Air and Climate Change
Environmental Management and Sustainable Development
Life Cycle Analysis
New Energies in the World
Recycling and Energy Recovery
Soils and Groundwater
Sustainable Development within Large Corporations
From 02:30 pm to 04:00 pm
The biography note is only available in french. Monsieur Desjardins a obtenu en 1984 un baccalauréat en génie civil à l'École Polytechnique de Montréal. En 1986 et en 1994, il a complété respectivement une maîtrise et un doctorat en génie de l’environnement à la même institution. Spécialisé en traitement des eaux potables et usées, Monsieur Desjardins travaille dans le génie-conseil depuis plus de 25 ans. Auteur d’un grand nombre de publications techniques et scientifiques et récipiendaire de plusieurs prix, dont la prestigieuse distinction Patrick O. Bourgeois, Monsieur Desjardins jouit d’une réputation enviable en tant qu’expert en procédés. Membre actif de Réseau environnement, il collabore également au suivi du programme de génie civil de l’École Polytechnique. Depuis 1993, Monsieur Desjardins œuvre au sein de la firme AXOR Experts-Conseils Inc. dont il est l’un des associés, à titre de Vice-président Environnement.
Starts at: 14h30
Mrs Carole Jutras has a bachelor's degree in geography, a master's degree in regional planning and development and a master's degree in public administration. Since July 2010, she is at the head of the municipal water branch, water policy directorate, at Québec's Ministry of Sustainable development, Environment and Parks. She has a diversified experience, having been at the head of the land planning and local development branch at the Québec's Ministry of Municipal Affairs for many years, as well as director of the president's office at the Québec's Administrative Tribunal.
Mr. Des Rosiers was trained as an engineer and holds a Master of Sc. Civil Engineering and a Master of Administration (Project Management). After having worked many years for the Quebec provincial government and then the federal government (Natural Resources Canada), he made a career shift by moving to Paris to head a Policy Analysis group at the International Energy Agency (OECD) where he spent 5 years. After having done a few contracts with UNFAO and UNDP, he returned to Canada with Environment Canada where he is since 2008 Director of Environmental Protection Operations for the Quebec Region.
www.acepu.ca / www.cwwa.ca
Jennifer Jackson a été nommée Directrice générale de l'Association canadienne des eaux potables et usées (ACEPU) en août 2010. Avant sa nomination, Jennifer était une analyste principale des politiques à la Direction générale de l’intendance environnementale d'Environnement Canada. Pendant 11 ans et demi, elle a servi comme Conseiller juridique à la ville d'Ottawa où elle a fourni des conseils juridiques en environnement, en planification, en gouvernance municipale, en vie privée, en entreprise et des avis juridiques municipaux. De 2006-2009, Jennifer a été nommée par l'Association des municipalités de l'Ontario au Comité des programmes de l'industrie municipale de Waste Diversion Ontario où elle a assisté aux négociations de l'augmentation du financement des municipalités ontariennes et aux changements de responsabilités fonctionnelles de travail dans le programme de recyclage des boîtes bleues et des déchets dangereux. Résidente à Gatineau, au Québec, Jennifer est titulaire d'un baccalauréat spécialisé en sciences biologiques de l'Université de Guelph et d’un baccalauréat en droit de l'Université de Windsor.
Bijan Aidun is the Municipal Wastewater Specialist with Alberta Environment. He has his Masters degree in Environmental Engineering and has been with Alberta Environment for over 25 years. In the last 8 years, Bijan has been in charge of developing Alberta’s standards, guidelines, regulation and policy related to Municipal Wastewater Systems and Storm Water Drainage Systems. Bijan has represented Alberta on the Canadian Council of Ministers of Environment (CCME) Development Committee to prepare the Canada Wide Strategy for Management of Municipal Wastewater Effluent and he is now member of the CCME Coordinating Committee. Bijan is in charge of implementing the CCME Strategy and the Federal Government’s regulation in Alberta.
The abstract will be updated shortly.
From 05:30 pm to 07:00 pm
Starts at: 17h30
Mr. LeBlanc has been Chairman of Greater Moncton Sewerage Commission (GMSC) since its inception in 1983. He is also the Senior Partner in the law firm, LeBlanc Maillet, also located in Moncton, New Brunswick Canada. In addition to his extensive commitment to the Commission, on a purely voluntary basis, he also serves on numerous other community and professional associations. Prior to his appointment as Chairman of the (GMSC), Greater Moncton had no wastewater treatment systems. Under his leadership, the GMSC has sited, built and paid for collector and wastewater treatment systems, as well as building a global leading edge composting facility in order to successfully deal with the recycling of biosolids. Mr. LeBlanc and the GMSC have also been pro-active at the scientific level and have published various articles that have been reproduced in scientific journals. They have also been invited to make presentations at local, national and international conferences in various countries, including the United States of America, Austria, New Zealand, China, Hungary, Norway, Turkey, Nepal, and South Africa. Mr. LeBlanc has also been invited by the United Nations (UN-Habitat) to speak to a conference of managers of African Cities at the United Nations campus in Nairobi, Kenya. Mr. LeBlanc was also the Conference Chair of the IWA Biosolids specialized conference, supported by the Water Environment Federation (WEF) held in Moncton, Canada on June 24-27 2007.
Mr. Allain received his civil engineering degree from Université de Moncton in 1979. He worked in Ottawa for several years initially with MacLaren, then Lavalin with a posting in Nigeria in 1982. With experiences in Wastewater, Water and Solid Waste, he returned to Greater Moncton in 1987 to continue his career with Touchie Engineering. He was appointed to the position of Director of Operations with the Greater Moncton Sewerage Commission in 1994. He has overseen several projects associated with the Collector Sewers and the Treatment Facility. As director of operations for the Greater Moncton Sewerage Commission (GMSC), Mr. Allain was the primary technical resource behind the design and construction of the municipal region’s state-of-the-art Biosolids Composting Facility in Riverview. Mr. Allain acted as senior engineer during every phase of the new wastewater treatment facility and directed every aspect of the biosolids composting facilitie—from site and process selection through to the research and development, design and finally, construction. Mr. Allain has shared his ground-breaking technical expertise with colleagues and academics around the world. He has presented his work at wastewater conferences in Brisbane, Australia; Beijing, China; Pécs, Hungary; Rotorua, New Zealand; and Trondheim. Norway. He has delivered training courses for water system operators in New Brunswick; lectured on wastewater collection, treatment and construction at the Université de Moncton and served as a co-thesis director for environmental engineering master’s students. Conrad Allain is a registered as a professional engineer in New Brunswick, and Ontario. He is also a member of the Pollution Control Association of Ontario and the Water Environment Federation. He recently received an award of merit for Technical Excellence from his association for his contribution to innovation, problem solving and applied research relative to the composting system.
The process of wastewater treatment results in the production of a valuable nutrient rich organic material or Biosolids, which contains significant quantities of organic nitrogen and phosphorus as well as trace amounts of minerals necessary for plant growth. The Greater Moncton Sewerage Commission (GMSC) servicing Atlantic Canada municipalities of Moncton, Dieppe and Riverview recognized the challenges as well as the opportunities of dealing with these Biosolids. At the GMSC, Biosolids is used as a key ingredient in manufacturing compost. The process makes use of a variety of by-products from the foresting industry (sawdust, bark) and farming (hay, straw, silage, manure). Biosolids, in this process, acts as a key ingredient, a catalyst or inoculator in high temperature aerobic composting and in producing products that are of high value in land reclamation, growing vegetation, in horticulture and in agriculture. The composting process used by the GMSC combines bottom aeration and a proprietary cover system. The process has been found to be very effective in destroying pathogens and inactivating weed seeds. In addition, the extended composting followed by a long curing phase reduces emerging pollutants such as pharmaceuticals. Compost produced is of the highest quality standard in Canada and can be used with no restrictions. The authors also believes that the existing strategies in managing Wastewater Biosolids and other biodegradable wastes and by-products will need to be developed further as a result of rising energy and chemical fertilizers costs. Compost contains macro and micronutrients often absent in synthetic fertilizers. Composts can be made at the local level with minimum technology and can drastically improve soil organic content and its ability to hold moisture in addition to the fertilizer value. Composting is a viable alternative for most of the waste and sludge management problems around the world. Composting can play a major role in developing a waste/resource management solution and in improving agricultural inputs in particular organic matter and humus. The GMSC and the authors have taken a leadership role in Biosolids management. In addition to participating at several conferences, they organized a World Environmental Specialist Conference supported by the International Water Association (IWA) and the Water Environment Federation (WEF) entitled “Moving Forward Wastewater Biosolids Sustainability: Technical, Managerial, and Public Synergy”. This world class event was held in Moncton, New Brunswick, Canada, in 2007. In addition, the GMSC, in partnership with UN-HABITAT, took the lead in creating the “Global Atlas of Excreta, Wastewater Sludge, and Biosolids Management: Moving Forward the Sustainable and Welcome Uses of a Global Resources” which was launched at the IWA World Water Congress in Vienna, Austria in 2008, and which publication is found on the United Nations web-site.
Starts at: 18h00
The biography will be coming soon.
The abstract will be online shortly.
Starts at: 18h30
Arnaud Cheyrou-Lagreze has a Master in Science & Technique in Air & Water since 1981. After obtaining a DEA in applied Ichthyology, he became a certified agronomist in Toulouse (France) in 1984. In 1988, he integrated the SIRIAL company as Co-Director, where he actively participated in the invention of the liquid sludge dryer prototype Valoris™. This prototype was created for pig manure treatment. Then, until 2006, he served as a technical expert in the IBS Ingénierie company. He was in charge of technical tests on semi liquids sludge. At the same time, he ensured the development process at industrial scale in the meat processing industry. Finally, M.Cheyrou Lagreze served as Technical Director since 2006 at Mechtronix Environment Inc. He is responsible for the technical validation of the various applications including the municipal sector of the Valoris™ process, as well as for all R&D evolution.
The biography will be updated shortly.
Municipalities as well as industries face multiple constraints in managing their residual materials. Environmental policies, higher volumes, cost of treatment, storage, are all factors that biosolids managers must consider in making a choice. This choice is becoming difficult due to the large range of technologies available. This conference will focus initially on the example of the City of Edmonton and the first experimental results obtained, to familiarize the audience with a technology of sludge thermal drying with low energy consumption. Since the 1st of April 2009, the city of Edmonton transferred the water treatment facility to EPCOR Water Services. Then, in a second step, the presentation will explain how this technology is the missing link among the technical processing and recycling of sludge and methanized sludge. In partnership with Mechtronix Environment and STDC, the City of Edmonton decided to become a pilot city by establishing a demonstration project of methanized sludge drying and recovering on the site of the WWTP of Gold Bar station. The project aims is to test Valoris™, the biosolids drying and recovery process developed by Mechtronix Environment Inc. The validation of energy efficiency of Valoris ™ for the different types of municipal sludge treatment and itscontribution to energy and agricultural recovery, will make the city as a national and international reference for municipalities. Thermal drying with Valoris ™ is well adapted for treatment of municipal sludge and digestate from anaerobic digestion processes. The method can support biological sludge at rates ranging from 2% to 15% of dryness. It comes out in powder or granules between 70% and 90% DM, and they are sanitized. The dried product exiting from the heat drying process can be enhanced by organo-mineral fertilizer or green energy. The method is conservative and non-destructive, most of the nutrients contained in the sludge can be found in the dry product. Energetically, the dry product has a high calorific value depending on the type of sludge treated. This technology fulfills the missing link in biosolids management thanks to the lowest operational costs on the market. Indeed, this process consumes less than 150 kWh per ton of raw product, compared with more than 800 to 1200 kWh per ton of raw product for conventional drying technologies. This excellent energy efficiency can be explained by the mechanical vapor compression process allowing recycling if the steam from the sludge drying and back it into the system. Valoris ™ also has a minimal impact on the environment since extracted water is (depending on choice of water vapor treatment) compatible with a rejection of the rainwater network. Also, thanks to its fully closed process, few gases go back to the atmosphere. Gases are captured and treated thanks to scrubbers. In the same way, residual water is treated. On the other hand, the current context in Quebec promotes the emergence of a biogas industry through policy on waste management. Heat drying fits perfectly into this biogas sector in providing cities with the opportunity to dry the digestate produced.
From 07:30 pm to 09:00 pm
Starts at: 19h30
Nigel De Souza is a Masters Student in the Environmental Engineering Department at Carleton University. He is a recipient of the 2009-10 and 2010-11 Lewar-OGSST scholarships, as well as a departmental entrance scholarship in 2009/2010. Nigel is an active student and has previously presented his undergraduate work on Dechlorination Reactions at the Ontario Water Works Association (OWWA) annual conference in May 2009. Nigel is currently involved with starting a joint OWWA/WEAO student chapter at Carleton University. He is also a current member of both “Lets Talk Science” and “Student Society of Environmental Engineering, Development, Management and Science (SEEDS)” on campus.
Onita Basu, Ph.D, is an Assistant Professor in the Environmental Engineering Department at Carleton University. She completed her Ph.D. in Environmental Engineering at the University of Waterloo. Her research focuses on process optimization in water and wastewater treatment with current projects aimed at membrane bioreactors, dechlorination research, and disinfection byproduct formation.
Membrane bioreactors combine the use of bioreactors and membrane filtration into a single treatment step requiring less operational space while producing treated water of high quality (Tian et al. 2009). Consequently the use of membranes has gained popularity in the treatment of water, wastewaters and water for reuse. However, the widespread application of membranes is still limited due to the unavoidable shortcoming of membrane fouling. Numerous studies have been undertaken to determine methods of reducing fouling through the implementation of physical cleaning mechanisms such as backwashing, relaxation and air sparging (Le Clech et al., 2003; Van der Marel et al., 2009). However, most of these studies focus on the determination of the critical flux for membranes and not on quantifying the effect of the various cleaning mechanisms on fouling reduction (Porcelli & Judd, 2010). Furthermore, most literature on membrane fouling is centered on fouling in the treatment of wastewater resulting in a shortage of information pertaining to the effect of natural source water constituents such as organic and inorganic matter on membrane fouling. The purpose of the research is to investigate the effect of physical cleaning mechanisms on membrane fouling as well as the impact of water quality parameters typical of natural source waters on membrane fouling. Two sets of 24 factorial experiments were designed to meet these objectives, the first set to investigate the effect of forward flux (19 and 38 LMH), backwash frequency, relaxation duration and air flow on membrane fouling and the second set to investigate the impact of dissolved organic matter, inorganic particulate matter and pH on membrane fouling. Experiments involve the use of simulated source water made up of humic acid, cellulose, kaolin clay and hardness chemicals treated in a continuous flow system. Preliminary experiments showed that the incorporation of relaxation in an operational regime resulted in a noteworthy reduction of fouling compared to regimes without relaxation. Le Clech et al., 2003. J. of Membrane Science 227, 81-93. Porcelli & Judd, 2010. Separation and Purification Tech., 71, Iss. 2, 137-143. Tian et al., 2009. Chemical Engineering J.148, 296-305. Van der Marel et al., 2009. J. of Membrane Science, 332, Iss. 1-2, 24-29.
Starts at: 20h00
Roger Lacasse is the Scientific and Technical Director at Premier Tech Aqua, a company that specializes in decentralized wastewater treatment. Lacasse is a professional engineer with a master’s degree in hydraulic civil engineering from Sherbrooke University in Canada. He has 30 years of experience in hydrology and in water and wastewater treatment for a wide range of system sizes and design flows. Since 1997, his work has focused on development of different wastewater treatment technologies (onsite, cluster and commercial systems) applicable to decentralized market, and on development of new standard by an active participation to different Subcommittees related to the NQ 3680-910 Standard in Quebec and CAN/BNQ 3680-600 Standard in Canada. Actually, he is member of the technical committees preparing a new Canadian standard: “CSA B65 Technical Committee on Decentralized Wastewater Systems”.
Where decentralized wastewater treatment is concerned, cost-effective phosphorus removal (DP) process represents major challenges that is, phosphorus removal below 1.0 mg/L without a pH exceeding a discharge limit of 9.5. Over the past three years, Premier Tech Aqua has tested various approaches to integrate DP options into decentralized wastewater treatment systems. A system that combined primary treatment and a new electro-coagulation (EC) process (patent pending) was tested over a one-year period. This system reduced total phosphorus to below 1.0 mg/L. Addition of an organic filter unit after the EC system increases the performance in total phosphorus removal to below 0.3 mg/L, TSS and BOD5 at 5 mg/L and fecal coliforms to below 200 counts/100 mL. The system developed is well-adapted to decentralized approach by reducing sludge production (60 to 70% less than sludge produced by conventional approach using chemical injection), eliminating chemical storage and facilitating process control. Finally, other testing are conducted to demonstrate the performance of the EC phosphorus removal approach combined with other filter units such as sand filter and membrane bioreactor technology (MBR).
Starts at: 20h30
Marcel Roy, ing, obtained his diploma in civil engineering from the University of Ottawa in 1982. He worked for 10 years as engineer designer for Boileau and Associates in Québec and for Giffels in Ontario. Afterward, M. Roy worked for the city of Gatineau, first as assistant to the Director of Public Works, then as Director of Public Works and Engineering and finally as Director of Technical Services following the amalgamation of 5 cities to create the new city of Gatineau. Since 2007, he has worked for JFSA, a firm specializing in hydrology and hydraulics, as Regional Director of the Outaouais. Mr. Roy has worked on the conception, behaviour analysis and maintenance of the municipal networks (sewer, watermain, etc.) in the City of Gatineau. Among other projects, he was notably involved in the analysis of the torrent rains of August 1994, which provoked more than 800 sewer backups in Gatineau. Besides his work in the resolution of sewer backup problems using dynamic computer simulations, Mr. Roy has also participated in the modification of municipal bylaw with the help of the MAM, allowing any municipality in Québec to assist residents battling against repetitive sewer backup by upgrading residential plumbing through the disconnection of tile drains connected to the sanitary sewer. With JFSA, Mr. Roy has participated in and coordinated several projects involving radar imaging characterization of heavy rains that resulted in sewer backup. Dynamic computer simulation is then performed using the rainfall data generated by radar imaging to evaluate sewer network weaknesses.
The behaviour of a sewer network or a watershed is a direct function of the volume of rain which falls on a given area. Rain gauge installation on the ground supplies pin point data of the rainfall; however, the spatial distribution of a rainfall is highly variable from one location to another. A more accurate representation of a storm relies on the interpretation of radar images, calibrated using rain gauges on the ground. How many municipalities have rain gauges on the ground and wonder what rain intensity provoked a sewer backup, a beaver dam collapse or a culvert washout? The answer to this question may be found through the overlapping of radar images (rain or snow) and a Google Earth image. JFSA thus proceeded with the development of tools to stack radar images from Environment Canada using Google Earth. Environment Canada radar coverage is almost 100% in densely-populated areas. In Quebec alone, 6 radar stations cover the zones of interest. Each pixel of an Environment Canada radar image represents an area of 1km2. Although it is interesting to look at these images, it is difficult to analyze a precise zone of interest at that scale. JFSA thus examined the possibility of stacking the geospatially-referenced radar images in Google Earth while preserving Google Earth features (e.g. zoom, distances, thumbtacks, roads, houses, etc.). The software package can very rapidly generate, everywhere in Canada where radar coverage is available, a rainfall event in 10 minute increments. The generated Goggle Earth KMZ file can then be transmitted to a client by standard e-mail. Starting with a small, difficult to analyze image, we can now obtain and enlarge a single pixel without losing the background. Better still, we can animate a rainfall event over an area on Google Earth and evaluate its intensity and consequent impact on existing infrastructure. A multitude of information is also visible on the screen, including the color of the cell (which represents the rainfall intensity range), the arbitrary grid reference number of the cell, the rainfall intensity range in mm/hr to assist in distinguishing colors and finally the total minimum and maximum accumulation of water at a given position in Google Earth. This information is displayed only at a certain scale on the screen. All the numbers presented in the cell may be compiled in Excel from an easily convertible TXT file. In Excel, the user can performed different mathematical operations to compute rainfall return period in a cell over a period of time. The development of this software is an ongoing endeavour. At the present time it is possible to generate a 100 km2 (10 km X 10 km) grid over a period of 24 hours by staking images in 10 minute increments. The 10 minute increment comes from Environment Canada, and is the rate of capture of Canadian radar stations. The 24 hour limit is related to Goggle Earth memory. In terms of speed of execution, a KMZ (Google Earth format) file can be created within minutes after the end of a precipitation event. The cost of the service is also a key factor in the success of this tool. For a few hundreds dollars, the customer has a powerful tool of analysis that can reduce the risk of exposure to lawsuits in, for example, the case of sewer backups. Combined with rain gauge analysis, the city has an additional tool to understanding the significance and the complexity of a rainfall event.
From 12:30 pm to 02:00 pm
Dr. Sri Rangarajan obtained his B.E. and M.E. degrees in Civil/Water Resources Engineering from India and a doctoral degree from the University of Manitoba, Winnipeg. He has extensive experience in environmental and water resources engineering in the areas of surface hydrology, multiobjective decision making, wet weather flow, water quality, and hydraulics. He has managed or led tasks in more than 40 challenging projects on watershed management (TMDLs and source water protection), CSO/SSO control, and stormwater management in U.S., Canada, China and India. Dr. Rangarajan is very familiar with federal and state regulatory issues in his areas of expertise and is actively involved in the review of regulatory policies and criteria. He serves as Chair of the Watershed Management Committee of WEF and Wet Weather Flow Technologies Committee of ASCE. He recently co-chaired the WEF symposium on Impaired Waters: Spanning the Water Quality Continuum.
Starts at: 12h30
The biography is available in French only: Denis Martel détient un baccalauréat en génie civil ainsi qu'une maîtrise en assainissement des eaux de l'Université Laval. Sa carrière a débuté au sein du génie conseil après quoi il a enseigné quelques années en technique de l'eau, de l'air et de l'assainissement au CEGEP de Saint-Laurent. Il a joint le ministère du Développement durable de l'environnement et des parcs en 2002 et il est actuellement chef de la division eaux usées du Service des eaux municipales.
Dr. Markowitz has over 30 years of experience in water quality evaluation, aquatic biology, project management, and environmental policy development. He has provided innovative solutions for wastewater, SSO CSO, storm water management, and source water protection planning and study projects. Dr. Markowitz has developed and implemented water quality studies on the CSO and SSO receiving waters for numerous Cities including Detroit, Michigan; Sandusky Youngstown, Akron, Cleveland, Youngstown, Lorain, Lancaster, Newark, and Columbus in Ohio; Buffalo, Albany and New York City in New York. Dan has also worked on water quality management for the Cities of Fort Wayne, and Valparaiso in Indiana, Bridgeport Connecticut, Williamsport Pennsylvania, and other projects regionally and nationally. Many of Dr. Markowitz's projects have supported NPDES permit applications, negotiations with State and Federal Agencies to define consent order requirements. The wet weather use attainability studies that Dan has led have helped municipalities define appropriate environmentally responsive solutions to control wet weather discharges that provide demonstrable environmental benefit. Dan has also provided support to clients to obtain NPDES permit approval for permits to install improvements and or upgrades to wastewater treatment facilities, in particular Dan's knowledge and experience in consent order negotiation has also led to support of permit appeals and expert testimony in support of clients positions on appropriate permit limits and requirements needed to meet applicable water quality standards. Dr. Markowitz is a Principal Environmental Scientist with Malcolm Pirnie / ARCADIS the water Division of ARCADIS-US.
Brooks Smith is a partner at Hunton & Williams LLP, where he focuses on emerging issues under the Clean Water Act. Brooks represents a diverse range of regulated parties, from national and regional trade groups to individual industrial, municipal, developer and institutional dischargers. He has been at the forefront of a number of high profile proceedings involving stormwater, TMDLs, NPDES permits, use attainability analyses, trading and effluent guidelines. Brooks is active in the Water Environment Federation, has chaired a number of national conferences, and is listed as a lawyer of distinction in both Chambers USA and Best Lawyers.
The biography is available in French only: Monsieur Osseyrane a dévolu sa carrière professionnelle dans les domaines du génie hydraulique et municipal. Détenteur d’un baccalauréat et d’une maîtrise en ressources hydriques de l’école Polytechnique de Montréal, monsieur Osseyrane a travaillé plus de 30 ans au service de la Ville de Montréal dans le plus grand projet d’assainissement du Québec, celui de l’épuration des eaux usées d’une agglomération de près de 2 millions d’habitants. En charge de la section Plans directeurs des réseaux de collecteurs et dans les réseaux des collecteurs, il a participé et coordonné des études et des projets de construction d’égouts collecteurs sur le territoire de l’île de Montréal. Monsieur Osseyrane a été reçu membre du programme de reconnaissance de la grande expertise des professionnels scientifiques de la Ville de Montréal dans le domaine du Drainage urbain. Actuellement, monsieur Osseyrane continue d’offrir ses services à titre de consultant chez BPR CSO comme directeur de projets en hydrologie et hydraulique urbaine. Monsieur Osseyrane a collaboré au sein de RÉSEAU environnement dans l’organisation de plusieurs journées techniques depuis plus de 20 ans. Il est l’auteur de nouvelles courbes enveloppes d’Intensité-Durée-Fréquence pour la région de Montréal. Monsieur Osseyrane a participé à plusieurs comités techniques dont celui du PIEVC (Protocole d’ingénierie du CVIIP pour l’évaluation de la vulnérabilité des infrastructures au changement climatique), Infra-guides et le comité rejets des réseaux urbains en temps de pluie de RÉSEAU environnement. Finalement, monsieur Osseyrane a présidé le Comité de RÉSEAU environnement qui a eu le mandat de rédaction du nouveau «Guide de gestion des eaux pluviales du Québec» publié en début d’année.
The abstract will be available shortly.
Ms. Tao is a Senior Hydraulic Specialist at BPR-CSO. She has participated in various projects on the modeling, evaluation and optimisation of the sanitary and combined sewer systems for the controls of CSOs, SSOs, inflow and infiltrations, and sewer back- ups in North America. Ms. Tao possesses a Bachelors degree in Environmental Engineering from University of British Columbia and a Master degree in Civil Engineering from McGill University. She masters the application of most major hydrological and hydraulic software. She has over 12 years of experience in the fields of environment, wastewater and water resources, both domestic and international.
David Beattie is a project manager for the City of Wilmington, Delaware-Department of Public Works. He is a licensed professional engineer and holds a B.M.E. and M.E. in mechanical engineering from Cornell University. He has 12 years of work experience on public works projects involving sewers, stormwater, street paving, sidewalk reconstruction and 30 years of work experience in private industry with utility operations, project management, plant and process design.
The City of Wilmington Delaware is a mid-size city in the mid-Atlantic region of the United States. The City has a combined sewer system. By Environmental Protection Agency (EPA) regulation, the City had to capture 85% of the average annual rainfall that was overflowing to receiving waters from 40 Combined Sewer Overflow (CSO) locations. The initial plan called for construction of storage facilities in City parks at a cost of ~$120M. A real-time control system is projected to accomplish the same results for ~$27M.
Starts at: 15h00
Starts at: 15h30
Historically, urban growth occurred around water bodies due to factors such as easy access to transportation, water supply, and drainage. With the expanded transportation network along with peoples’ desires to live in more pristine environments, dense growth from the cities began to spread to surrounding previously undeveloped areas. Significant sprawl continues to occur based on short-term goals rather than a regional, holistic approach. Changes in impervious covers due to developments can be inevitable. However, the effects of these changes are challenging from policy, regulatory and technical perspectives and need innovative methods and planning strategies to mitigate those effects. In this presentation, a multi-objective decision framework has been developed to guide the determination of an effective imperviousness that can better address the various challenges pertinent to a site where a new or re-development is being planned. The simulation-optimization approach developed here can help determine the minimum reduction in impervious cover necessary, under the given site-constraints, so that the developers can strive to meet or exceed this target reduction. Constraints are placed on a site depending on the appropriate regional challenges that can be grouped into three major categories: (a) hydrologic considerations including variability in rainfall and pre and post-development flow volumes/ peak runoff rates, and groundwater recharge; (b) sustainability (green) considerations including on-site retention/detention and water reuse in terms of its reliability and effectiveness in reducing stormwater volumes/peak flows; and (c) water quality considerations including pollutant load reductions to the receiving water bodies. Metrics for evaluating various considerations can be expressed quantitatively (e.g., cost factors) and qualitatively (e.g., weighting factors for the objective functions). This framework has been applied to a highly urbanized watershed. The inputs for the simulation-optimization process have been developed through mathematical modeling of the hydrologic and hydraulic elements and development of preliminary cost estimates. Optimum (minimum) impervious cover reduction target is developed based on site-specific issues and discussions will provided in this presentation to demonstrate the application to conceptualize sustainable stormwater management strategies.
From 05:30 pm to 09:00 pm
Jeanette Brown is the 2010-2011 President of the Water Environment Federation (WEF), an international organization of water quality professionals headquartered in Alexandria, Va. She is currently the Executive Director of the Stamford Water Pollution Control Authority (Stamford, Conn.) and Adjunct Faculty in Environmental Engineering at Manhattan College in Riverdale, N.Y. Jeanette has been a WEF member since 1976 and has served on WEF’s House of Delegates from 2004-2007. She has also been a member of or chaired several WEF committees including Operations Challenge, WISE Committee-Developing Guidelines and Training for Wastewater Security, Municipal Wastewater Treatment Design and Technical Practice as well as WEF’s Community of Practice for Microconstituents and as the facilitator for WEF’s HOD Strategic Planning Sessions and Governance. In addition, she has co-chaired and authored several of WEF’s publications including Manuals of Practice and training courses. She has also published numerous papers, made numerous presentations at WEFTEC and other industry-related events, and is on the editorial board of the Journal of the U.S. SJWP. She has been an active member of the New England Water Environment Association (NEWEA), the American Academy of Environmental Engineers (AAEE), the American Society of Civil Engineers (ASCE) and their Environmental and Water Resources Institute (EWRI) and the International Water Association (IWA), serving in a number of positions including President of AAEE and President of EWRI. Jeanette has received WEF’s Hatfield (1986) and Public Educators Awards (2003); NEWEA’s NEWPCA Operator of the Year (1988), Alfred E. Peloquin (2000) and Public Educators Awards (2002); as well as the Governor's Environment 2000 Award for contributions to improving the water quality of Long Island Sound (1993) and an EPA Region 1 Merit Award (2007), AAEE, Edward J. Cleary Award (2008), AAEE Kappe Lecturer (2008). She is a licensed Professional Engineer in Connecticut; Board Certified Environmental Engineer (AAEE); Diplomate of the American Academy of Water Recourses Engineers (AAWRE), Class 4 Wastewater Treatment Plant Operator; and Class 4 Collection System Operator. Jeanette received a B.S. from the University of Maryland in College Park and an M.S. in Environmental Engineering from Manhattan College.
Robert (Bob) Freudenberg has been Vice President of Entex Technologies in Chapel Hill North Carolina since 2006. He has a BS in Chemical Engineering from Villanova University and an MS in Chemical and Biochemical Engineering from the University of Pennsylvania. Bob’s more than 30 years of experience in the design and operation of process systems and equipment encompasses a wide range of biological systems, including fixed-film, suspended growth and hybrid treatment systems for industrial and municipal applications. Early in his career, he was the Project Engineer or Project Manager for some of the first biological phosphorus removal and pure oxygen wastewater treatment systems built in the United States.
The existing wastewater treatment plant at the city of The Colony, Texas consisted of two parallel contact stabilization trains that were designed only for BOD and TSS removal. The rapid development in that Dallas suburb created a need to upgrade the city’s Stewart Creek WWTP from 3.4 mgd to 4.5 mgd. As part of the flow expansion, the Texas Commission on Environmental Quality (TCEQ) issued a new permit requiring the plant to meet strict effluent ammonia-nitrogen and total phosphorus limits. An evaluation of expansion alternatives led to the decision to use Integrated Fixed-Film/Activated Sludge (IFAS) in the existing facilities to provide the required nitrification and treat the increased flow. IFAS technology is a hybrid biological wastewater treatment process that combines suspended growth and attached growth treatment. This is accomplished by adding a high surface area media directly into the aeration basins of an activated sludge plant to increase the amount of biomass available in the system. Two types of media are available for IFAS upgrades, fixed woven fabric media and floating carrier elements. The city’s consulting engineers selected fixed media for this application. This presentation summarizes the design considerations that led to the choice of this particular media and provides a case study on the upgrade of this facility. A summary of the influent and effluent data since completion of the IFAS upgrade is included in the presentation. Effluent quality has been good since completion of the upgrade.
Dr. Holakoo is a Process Engineer in the Water Technoligies Group at Black & Veatch. She has been involved in process evaluation, modeling, upgrade and expansion of the wastewater treatment facilities. Specific expertise includes biological nutrient removal (BNR) and computer simulation of biological wastewater treatment processes. She has worked on various types of projects involving conventional activated sludge systems as well as advanced treatment technologies like membrane bioreactors (MBRs), moving bed bioreactors (MBBR) and integrated fixed film activated sludge (IFAS) processes. Dr. Holakoo is a registered professional engineer in Canada and the United States. Before joining Black and Veatch, she worked as a wastewater process engineer with Veolia Water in the US.
Integrated fixed film activated sludge (IFAS) and moving bed biofilm reactors (MBBR) are growing in popularity, as many Utilities have found them to be economically competitive with conventional activated sludge. This presentation will share lessons learned from “first generation” plants in North America, starting with the Broomfield, Colorado IFAS facility in 2003, and the South Adams County, Colorado MBBR facility in 2004. Six other operating plants will be discussed, including IFAS facilities in Cheyenne, Wyoming; Yucaipa, California; Flagstaff, Arizona and Lubbock, Texas; and MBBR facilities in Cheyenne, Wyoming and Brisbane, Australia. Full-scale data and operator testimonials from these facilities have been instrumental in designing “second generation” IFAS facilities in West Haven, Connecticut and Westchester County, New York; and MBBR facilities in Fort Myers, Florida and Midwest City, Oklahoma. The presentation will cover a wide range of process and practical design considerations, as well as start-up considerations.
Beverley Stinson serves as a Vice President with AECOM Water. She holds a First Class Honors Degree and Ph.D in Engineering from Queens University Belfast and Imperial College London an currently serves as the Director of Research and also as the National Technical leader for Nutrient Management at AECOM. As such she has been intimately involved in most of the major BNR and ENR research and plant upgrades in New York City and the Chesapeake Bay. As part of the BNR / ENR technology research Beverley has had the opportunity to work on the development and design of several novel centrate / filtrate treatment facilities including the first SHARON process in the USA and the largest Deammonification facility in the world at Blue Plains. Today she will share some information with us on the current state of knowledge with regard to these novel processes and where the research is taking us next with regard to the use of the ANAMMOX bacteria in mainstream wastewater treatment.
What can ANAMMOX Deammonification do for you? An overview of the pros and cons of various sidestream centrate deammonification facilities (suspended,attached and granular processes) and discuss the potential to successfully implement ANAMMOX deammonification in mainstream wastewater treatment. The ANAMMOX bacteria was identified in the late 1990s but has been rapidly adopted as an energy efficient bacteria offering the potential to remove nitrogen with reduced oxygen and carbon demands. It does so through a process known as deammonification. Compared to nitrogen removal by the conventional nitrification-denitrification pathway, ANAMMOX deammonification offer a 60% reduction in oxygen demand and eliminates the need for external carbon demand (e.g. methanol) while effectively removing nitrogen. Sidestream Deammonification - Due to these savings in aeration and external carbon demand, within the past decade there has been a thrust to develop and implement full scale deammonification processes for treatment of high-strength ammonium-laded sidestreams from dewatering processes following anaerobic digestion (e.g. centrate, filtrate, etc.), which typically constitute approximately 20% of the overall plant nitrogen load. These applications are typically referred to as sidestream deammonification processes. In the last five years, implementation of various sidestream deammonification processes at European WWTPs has been rapid; North American WWTPs are beginning to view sidestream deammonification as an established process and are also seeking to implement these processes. There are currently approximately 20 full scale sidestream deammonification facilities in operation in Europe and two in the design phase here in north America, namely Blue Plains WWTP in Washington D.C. and Alexandria WWTP in Virginia. The existing full scale sidestream deammonification facilities use a range of processes including suspended, attached and granular ANAMMOX bacteria and in a range of configurations including two stage and single stage. Each has advantage and disadvantages with regard to performance, reliability, energy efficiency, ease of operation and greenhouse gas emissions. This paper will review several full scale case studies and compare and contrast the benefits and disadvantages of the various sidestream ANAMMOX configurations. Mainstream Wastewater Deammonification –Given the tremendously successful application of ANNAMOX in the sidestream, many are undertaking research to determine how feasible it may be to promote and sustain the growth and nitrogen removal performance of ANAMMOX in the cooler, more dilute mainstream wastewater environment. Several leading facilities are in the process of piloting and demonstrating this concept including DC Water, Hampton Roads Sanitation District and the Strass and Glanerland WWTPs in Austria. This paper will provide an overview of the ongoing research efforts and discuss the vision for future successful deammonification wastewater treatment facilities that have the potential to be significant energy production facilities using renewable resources such as wastewater.
The energy required for treatment and delivery of drinking water accounts for as much as 80% of its cost, and an insufficient supply of affordable energy will have a negative effect on the price and availability of water. However, wastewater has potential to be a producer of energy, as treatment plants can be not only energy neutral but producers of energy. Biosolids from a treatment plant are a renewable energy source. This paper discusses energy demand in general, the potential for energy generation from wastewater, and a case study in energy recovery from gasification.
Frank Belfry is a Senior Professional Engineer and Principal with Kerr Wood Leidal Assoc Ltd. in Burnaby, British Columbia. He is a graduate of Queen’s University in Kingston Ontario and now has over 35 years experience in planning, design and implementation of municipal infrastructure. He has been: - President of the British Columbia Water and Waste Association, - Director of the Water Environment Federation - Director of the Consulting Engineers of British Columbia - Chair of the District of North Vancouver Advisory Planning Commission ,and - Chair of the Squamish Nation Planning Commission. In addition he was President of Kerr Wood Leidal Assoc. from 1997 to 2006 and was Chairman of the Board of Directors for 13 years. Recently Frank Belfry was the Project Manager for the design and construction of the Whistler Olympic Village District Energy System in Whistler, British Columbia.
The extraction of heat from municipal wastewater effluent is a promising and innovative technology that has seen only very limited application in North America. It has the potential to provide communities with an opportunity to reduce their dependency on carbon-based energy sources by utilizing a heat source that has traditionally been discarded. The district energy sharing-system (DESS) at the Whistler Athletes’ Village (WAV) uses the heat energy from the effluent at the Whistler wastewater treatment plant (WWTP) as the primary form of heating. In the event that there is not enough available heat in the effluent, gas fired boilers provide the DESS with additional heat energy. The commissioning and optimization of the WAV DESS was completed prior to January 2010. This presentation will describe how the DESS performed during the Olympic Games, quantifying what proportion of the heat energy in the DESS was derived from effluent. The presentation will cover issues and opportunities that were encountered during the commissioning and optimization of the system. Furthermore, the presentation will address the conversion of the WAV to residential inhabitation, and how the system performed throughout 2010 to date.
Ahren T. Britton (MSc, P.Eng), Chief Technology Officer Mr. Britton has more than 10 years experience in environmental engineering, specifically focused on the wastewater treatment industry. He is a co-inventor of Ostara's technology and developed the first prototype of Ostara`s technology during his research at the University of British Columbia. His professional experience includes roles in engineering consulting, municipal utilities and heavy industry both in North America and in Australasia.
Sylvie Baig received her degree as a chemical engineer in 1989 and obtained her PhD from the National Superior School of Chemistry at Toulouse, part of National Polytechnic Institute of Toulouse, France. In 1992, she joined Degrémont as Research Engineer. She is currently Head of Scientific Innovation in charge of the coordination of the Suez Environnement platform “Research and Innovation for the Industry”, coordination of a network of scientific partners and correspondents, coordination of scientific intelligence, development and use of methods for strengthening the capacity and management of the innovation, scientific and methodological support for R & D/industrialization projects, relationships and coordination with R & D entities within Suez Environment, expertise on business projects. Her work focuses on water, sludge and air treatment. She is co-author of the Degrémont’s Water Treatment Handbook, active in events in the water field and in the international network of associations and institutions. Among others, she participates in the Executive Committee of the French Society of Chemical Engineering, in the Competitiveness cluster AXELERA on Chemistry and Environment, in the European Platform Water Supply Sanitation Technology Platform. She is currently the President of the International Ozone Association, the unique association that gathers the scientific and technical community around fundamental, engineering and applied aspects of oxidation techniques involving ozone or any derived or comparable oxidants for any purpose.
The International Ozone Association The International Ozone Association is a non-profit educational and scientific organisation dedicated to the collection and dissemination of information on, and to promote research in, any and all aspects of ozone and related oxygen species technologies. In 1973, the professionals from industry and research sectors created the International Ozone Association as network dedicated to support the growth of ozone application in all fields. Since its foundation, the IOA is at the forefront in connecting professionals around the globe involved and interested in ozone-related issues including scientists, researchers, engineers, system designers, technologists, equipment manufacturers, consultants, end users and members of governmental agencies. The Association groups together almost 1300 members representing the world’s leading edge of ozone and related oxidants specialists from various disciplines through three regional groups. The Association is thus in the first position to help professionals interested in any ozone related topics by offering them many services: publications, taylor-made events, promotion of research programs, quality assurance papers, regulations overview… Ozone and its applications The use of ozone was made possible through the development of ozone generators mainly based on corona discharge applied to oxygen-containing gas. The latter directly installed on the use site permit to make the most of the oxidizing properties of ozone in various fields since the beginning of nineties. Ozone can serve in any case where an effective oxidizing action is required on natural, organic, inorganic, mineral, biological, gaseous, liquid or solid substances: disinfection (destruction of pathogenic germs in water, gas, equipment, packaging…), pollutants removal with biodegradability increase, decolorization, COD abatment, VOCs elimination, reduction in toxicity, degradation of specific compounds (from water, air, surface…), conversion and purification of products (chemicals, natural products), therapy purpose… Ozone for water treatment Ozone was used as early as 1893 for disinfection of drinking water in Holland. Full scale ozone application in water treatment goes back to 1904 with the installation for drinking water production in Nice, France. By 1980, there were over 1100 water treatment facilities utilizing ozone, mostly in Europe. Ozone treatment of drinking water is well established in Europe and now grows in North America. Ozone has been used in the USA since 1979, beginning with a water treatment plant in Monroe. Michigan. It was implemented in Quebec, Canada, in the early 1980s and is now gaining in popularity in other provinces. Ozonation for drinking water provides several key benefits such as disinfection and Disinfection By-Product Product control. Use of ozone is increasing because very often, several benefits are achieved at the same time. This ability to achieve multiple benefits has increased ozone’s role in current water treatment practice. Europe has pioneered the development of ozone application in the production of drinking water that has over 2000 references. The North American continent has taken over from the 1970s in the field of disinfection of urban wastewater as an alternative to chlorination. The increase in the number of treatment plants equipped with an ozonation facility has been supported by several factors: the significant progress on the performance of ozone generators, advances in the design of ozone contactors, demonstration of the effectiveness of ozone to meet various objectives. Current challenges Innovation in application of ozone for water treatment is driven by three key challenges: – The degradation of the quality of raw water sources when higher and higher quality is expected after treatment, – The use of wastewater as alternative resource for many purposes, – The need for sewage sludge management. Accordingly, ozone-based oxidation technologies are among the water treatment technologies enjoying the strongest growth prospects, close to 10% per year. The drivers identified for new water and wastewater technologies cover issues addressed in IOA events and publications: – Energy management for the better cost-efficiency of oxidation processes (low energy processes, energy recovery, alternative energy resource), – Water scarcity: water reclamation, natural water conservation – Sludge treatment: sludge minimisation, sludge pretreatment, sludge production reduction – Emerging contaminants: removal, toxicity control.
Starts at: 13h00
Dr. Jasim received his B.Sc. in Chemical Engineering from Baghdad University, Iraq, and his M.Sc. and Ph.D. in Chemical Engineering from the University of Wales, the United Kingdom. He serves as the Director, Great Lakes Regional Office-International Joint Commission. He direct the operation of the Scientific and Technical programs, initiate strategic partnerships and alliances with the universities, and other stakeholders in the water industry to work on emerging issues related to water quality. Dr. Jasim was the First CEO of the Walkerton Clean Water Centre and played a major role in establishing the Centre to make it a leader in the drinking water industry for training, education and research. Dr. Jasim served as Director, Water Quality and Production for the Windsor Utilities Commission. He proposed, and successfully implemented ozone for drinking water treatment in Windsor, Ontario. Dr. Jasim has received awards for his work, including; the 2008 Emerald Award-Ontario Ministry of the Environment, 2004 Engineer of the Year Award-Professional Engineers of Ontario. Currently, Dr. Jasim is an Adjunct Research Professor at the University of Western Ontario and Adjunct Professor at the University of Windsor. Serves as the President of the International Ozone Association-Pan American Group (IOA-PAG); President of the Ontario Water Works Association (OWWA).
The Great Lakes that is shared by Canada and the United States is the source of drinking water to approximately 40 million people in the two countries. Canada and the United States created the International Joint Commission (IJC) because they recognized that each country is affected by the other's actions in lake and river systems along the border. The two countries cooperate to manage these waters wisely and to protect them for the benefit of today's citizens and future generations. These lakes and rivers are used for many purposes. Communities and industries may get fresh water from them, allow waste water to drain into them, or use hydroelectric power generated by the flow of rivers. This paper will include a review and discussion for the application and success of ozone in three cities to address different water quality issues. The successful application in the three cities promoted the use of ozone in many other cities in the Great Lakes basin. Ozone applications started to address some of the new challenges in drinking water quality such as Chemicals of Emerging Concern (CEC), which include pharmaceuticals and Personal Care Products (PPCPs). The topic of chemicals of emerging concern is of longstanding interest in the Great Lakes community and in the environmental agencies and of the governments. Studies conducted in the Great Lakes region showed that ozone and advanced oxidation processes (AOPs) involving ozone and hydrogen peroxide, successfully removed these chemicals. In 2002-2004, a study on Detroit River indicated a high removal of such compounds with ozone application compared to conventional treatment systems. A study in 2008-2009 conducted on Lake Huron water using ozone and hydrogen peroxide AOP, was more successful in removing pharmaceuticals and personal care products and pesticides than conventional treatment processes.
Starts at: 13h30
The biography is available in French only: Christian Khayat ing., est titulaire d’une maîtrise en génie de l’environnement de l’école polytechnique de Montréal. Depuis la thèse de sa maitrise qui portait sur l’ozonation de l’eau, Christian Khayat a réalisé de nombreux projets en ozone dont les études et les plans et devis ainsi que la mise en service des usines de Laval ainsi que le projet en cours de la mise aux normes des usines de Montréal. Son expérience couvre également la réalisation d’étude et de projets pilote en ozone dont des essais pilote sur le traitement des sols et des eaux contaminées à l’ozone dans l’est de Montréal pour Petro-Canada. Christian khayat est à l’emploi de SNC-Lavalin depuis plus de quatorze ans et cumule plus de vingt ans d’expérience en conception, préparation de plans et devis et gérance de projets impliquant une variété de projet tant au Québec qu’à l’international. Il agit comme directeur de projets ou comme chef d’équipe en dirigeant la conception et en organisant et supervisant l’équipe de travail pour des projets d’envergures ou de moindre envergure impliquant plusieurs ingénieurs et professionnels pour des petites et grandes usines de traitement des eaux en milieu urbain ou industriel.
The abstract is available in French only : Les options d’élimination des boues en excès de traitement secondaires des eaux usées vont diminuer dans les dix prochaines années en conformité avec la politique du gouvernement du Québec (2010-2015) qui vise à bannir l’enfouissement des matières organiques. Cette situation se conjugue avec la rapide et constante augmentation des coûts d’élimination qui motivent les usines de traitement des eaux usées à installer des technologies pour réduire la quantité de boues en excès produites. Une des technologies expérimentée en Europe avec succès est le traitement à l’ozone des boues recirculées; et la Régie d’Assainissement des Eaux du Bassin La Prairie (RAEBL) considère sérieusement l’installation de la première unité pleine échelle de cette technologie en Amérique de Nord. Cette installation sera aussi la plus importante au monde pour traiter des boues municipales. Les études préliminaires du projet ont démontrées que sa viabilité économique reposait sur la capacité de prédire précisément les performances de réduction des boues produites et sur l’atteinte de buts de développement durable complémentaires à cette réduction telle la désinfection de l’effluent final. Étant données la nature spéciales des boues composés de boues à la fois municipales et industrielle le projet a nécessité de passer par plusieurs étapes dont une modélisation mathématique et l’expérimentation sur une installation pilote à petite échelle. Ainsi, nous avons conduit une étude pilote à l’usine de la RAEBL pour vérifier la performance et valider notre modèle mathématique, ainsi que des outils qui ont servi à finaliser notre étude économique. L’étude pilote à permis de démontrer que la performance à l’usine de la RAEBL serait similaire à celle d’une installation municipale conventionnelle, bien que la composition de l’affluent soit très atypique. De plus, la réduction de la production de boues décroît linéairement avec l’augmentation de la dose d’ozone tel que prédit par le modèle, ce qui permet de conclure que les variables importantes pour la prédiction de la performance sont : l’âge de boues, le type de traitement (conventionnel ou nitrifiant-dénitrifiant), la température, la dégradabilité de l’affluent. Ces données ont été utilisées pour faire l’étude économique du projet. En couplant le projet de réduction des boues avec la désinfection de l’effluent finale tous deux par des procédés de production d’ozone la Régie présente un bon exemple de synergie de projet bénéfique et respectueux de l’environnement et du développement durable en permettant à la fois la désinfection des effluents à la réduction des boues de la station. Les coûts d'exploitation supplémentaires de la désinfection seront largement compensés par les éonomies associées à la réduction des boues.
From 06:15 pm to 08:15 pm
Starts at: 18h15
Mrs Janic Chaîney is graduated from Sherbrooke University and is a member of the Ordre des Ingénieurs du Québec. For 15 years, Mrs Chaîney participated to many start-ups and commissioning of wastewater treatment plants for Dessau firm. Mrs Chaîney also was director by Interim of La Pinière Wastewater treatment plant in Laval which treats a daily average flow of 240 000 m³/d and counts thirty operators and mechanics. Mrs Chaîney is now application engineer for ITT W&WW Canada, major equipment supplier in pumping, aeration, filtration, UV and ozone process.
Mr Harald Stapel holds a Masters degree in Science (Environmental Engineering with a focus on water & wastewater treatment) from Paderborn University, Germany. Mr.. Stapel began his career in Research & Development working on biological and oxidation processes. Over the last 14 years, he has held roles in Sales Engineering as well as Sales Management. Mr..Stapel currently holds the position of Global Sales Manager for Wedeco Ozone Systems.
The combination of biological treatment with ozonation is one important approach to applying ozone in the field of waste water processing. Besides the synergistic effects of such a process combination, which leads to the oxidation of recalcitrant and inhibitory compounds or intermediates by enhancement of their biodegradability, the key for raising applicability is the improved efficiency of the ozone generation. Moreover the treatment of municipal waste water itself is of increasing interest due to several benefits such as disinfection, decolorization and removal of persistent dissolved organic carbon (DOC), EDCs or pharmaceuticals for water re-use and groundwater recharge. Figure 1 gives an overview on the various possible applications for ozone in the field of waste water treatment. The results from research studies and ongoing large scale pilots show the promising use of ozone to treat effluents of municipal waste water treatment plants. The ozone treatment exhibits advantages in comparison to chlorine oxidation and other advanced oxidation processes, e.g. UV/H2O2. Even in waste water matrices ozone reacts fast and specifically (non-radical mechanism) with many of the investigated compounds. Therefore it is possible to achieve treatment results (reduction rates > 90%) even with relatively low ozone dosage of 5 to 10 mg/L. It is possible to reduce the concentrations of specific contaminants as well as pathogens and to eliminate estrogenicity. The operational cost of ozone treatment is in the range of 0.01 to 0.02 US$ per m3 treated water (0.03-0.06 US$ per 1000 gal). The integration of an ozone treatment step in different treatment chains, e.g. Biology-Ozone-Biofilter-UV enables the operators of treatment plants to be consistent with future regulations regarding persistent substances and disinfection goals. The presentation will summarize the existing knowledge on the effects of ozone and describe treatment results of conducted large scale pilot studies as well as from operating systems. The existing knowledge of ozone systems combined with new research results enables potential end users and consultants to design and construct large scale treatment plants.
Starts at: 18h45
Starts at: 19h15
The biography will be updated shortly
Starts at: 19h45
Dr Yargeau is an engineer who joined McGill University in 2004. She is currently an Associate Professor and Graduate Program Director in Chemical Engineering and an Associate Member of the McGill School of Environment. Her expertise is in chemical & environmental engineering. She is a leader in degradation of aqueous pharmaceuticals and xenobiotics using biological systems and advanced oxidation. Her research focuses on both fundamental and technological aspects leading to improvement of technologies to mitigate the release of pharmaceuticals in the environment. She has established strong research collaborations in Canada and internationally as well as industrial collaboration. She serves on various committees including the international management committees of two specialist groups of the International Water Association (IWA). The innovative aspect of her research have already been recognized by several refereed publications, two research awards received at international conferences and invited talks.
The risk associated with pharmaceuticals in the environment is a rising issue of global concern. The research presented here focuses not only on the removal of these selected pharmaceuticals during ozonation and other oxidation processes of wastewaters but also on the identification of products and the characterization of their residual toxicity. The fate of a selected pharmaceuticals including sulfamethoxazole (SMX), levofloxacin (LEVO) and 17-ethinyl estradiol (EE2) have been studied during oxidation processes including: ozonation, photolysis and photocatalysis. Although SMX was rapidly degraded in the presence of ozone, sulfanilamide was produced as an intermediate and products were shown to have an effect on mammalian culture cells (HepG2). Surprisingly, comparative experiments performed in pure water and in a secondary municipal effluent indicated that similar ozone doses were required in both matrices to obtain similar SMX removal. Faster removal was obtained by photolysis than in presence of TiO2. However, a more complex mixture of persistent products was obtained when using UV exposure alone. LEVO and its antibacterial activity (measured using Agar diffusion tests) were completely removed when exposed to an ozone dose equivalent to the LEVO concentration (1:1, mass basis). However, the maximum mineralization attained was less than 60% even with increased ozone doses. While photocatalysis treatment of LEVO resulted in a residual COD that decreased monotonically with increasing irradiation time. As for the ozonation of EE2, the treatment resulted in the formation of solution of lower estrogenic activity based on the YES assay. Two products formed were identified and were shown to induce a decreased testosterone production in cultured fetal rat testes. Overall, these results demonstrate the importance of an improved understanding of the fate of pharmaceuticals in oxidative treatments and provide insight on ways to control their transformation in order to convert these agents to non-toxic, biologically less active or more biodegradable species.