at 14H00 | 520 CF

The Flow of Waste in a Circular Economy

Presented by: Chaire de recherche sur la valorisation des matières résiduelles
Moderated by: Robert Legros, Chaire de recherche sur la valorisation des matières résiduelles
Green and circular economy

- Incentives in Gatineau: How to evaluate their performance?

With the ban on the burial of organic matter and the objective of reducing the amount of garbage generated by 45%, the City of Gatineau is putting in place several incentives. What are these measures and how are the performance measured? This presentation answers these questions and takes place in two parts. The first part presents the various incentives that exist, and application examples focused on what the City of Gatineau is putting in place. The second part presents a methodology to be applied to evaluate the performance of the implementation of incentives within municipalities. The purpose of this presentation is to illustrate how the implementation of incentives can influence the generation of the waste stream.Through its partnership with the CRVMR, the City of Gatineau uses the methodology developed to be able to evaluate the effectiveness of the implementation of incentives.

- Influence of waste treatment scales in the context of the agglomeration of Montreal

As part of its PDGMR, the City of Montréal wants to reduce, in the specific context of the agglomeration, the economic and environmental costs related to the export of garbage over long distances. This reduction involves reducing the transport distances of the materials by respecting the built environment according to the density and types of housing. We will discuss the impact of centralizing the treatment of materials on the agglomeration of Montréal according to the variation of costs and quantities to be treated. Methods to adapt our understanding of the management of residual materials in a territory according to its structure and distances to travel, develop in partnership with the CRVMR, will also be discussed.

- The co-digestion of organic matter in Laval: benefits and limits

The Ville de Laval has planned in its last PGMR the construction of a biomethanation center that will treat the sludge of its three wastewater treatment plants, in addition to the content of the collection of organic organic matter. The latter, currently being implemented, aims to recover food residues and green residues in the same bin for residences of 7 or fewer units.Such co-treatment often has several advantages. However, the high proportion of green residues during peak periods could affect the performance and stability of the process, as well as modify the fertilizing properties of the granules produced from the digestate.Through its partnership with the CRVMR, the City then quantified quantitatively by numerical simulation the impacts of these peak periods of green residues on the operation and the performances of the process, and on the properties of the digestate produced. She was therefore able to make several observations.

- Portrait of CRD flows in Quebec: from the deposit to the outlets

In Canada, residues from Construction, Renovation and Demolition (CRD) projects represent approximately the third of all landfilled waste. There are currently some opportunities for some CRDs such as residues from road works, bituminous mix and metal, whose homogeneity facilitates recycling. But what about buildings that have a wide variety of materials that are difficult to separate from each other? What are the limitations of the sorting operations that are done on these CRD residues from buildings? What alternative is available when the energy recovery of treated wood and particle board is limited by environmental constraints? How to recycle gypsum? What can be done with the 481,000 t of fine fraction generated annually when daily cover is no longer an option? This presentation is done jointly with RECYC-QUÉBEC and tries to answer these questions.