The City of Matane will undertake a techno-economic feasibility study for the co-digestion of residual organic matter by anaerobic digestion. The organic matter to be treated would include materials from residential, industrial, institutional, and commercial collection as well as secondary sludge from the treatment of a paper mill’s wastewater. According to the inventory of greenhouse gas emissions carried out for the City of Matane, the treatment of residual material accounts for 91% of emissions for activities over which the city has direct control. The study stems from an update of the residual material management plan for the Matane RCM conducted in 2016.Following a meeting with city officials to review and adjust the details of the methodology, the city and its consultants will analyze the project’s policy, technical, and financial concepts, as well as quantification of GHG emission reductions. An estimate of the overall facility costs, biogas market, and rate of return will inform the economic analysis. This analysis, along with the technical findings, will be presented to the managers involved in the project as well as elected officials. Toward the end of the study, visits to plants similar to the ones for the selected scenario will be planned to better assess best practices and key challenges. The feasibility study will also analyze two residual organic matter collection scenarios: collection using a third track and collection from waste for mechanobiological treatment.With the exception of septage, all of the city’s organic matter to be treated by anaerobic digestion will be landfilled. Preliminary estimates indicate that the landfilling of paper mill sludge emits approximately 64,500 tCO?e/year, and the project aims at diverting all of it. For municipal and IC&I residual organic matter, based on a 2012 inventory, it is estimated that the engineered landfill generates approximately 14,500 tCO?e/year. As 100% of the sludge and approximately 60% of the residual organic matter from curbside collection would be diverted from landfill, the goal is to achieve a reduction in GHG emissions of at least 50% compared to status quo. The city believes that this is a conservative target and that a reduction in GHG emissions of approximately 80% could be achieved.