In this process, anaerobic biomass transforms organics in the raw wastewater (mainly sugars) into methane gas. This biogas fuel is then consumed to dry bleached chemi-thermomechanical (BCTMP) pulp in the final step of production.
The process displaces the light oil previously used, thereby reducing fossil fuel consumption by 87% and also reducing greenhouse gas emissions to the environment as well as solid waste to landfill by 24%. Biogas fuel currently accounts for 79.5% of Matane Mill’s on-site fuel consumption. What’s more, installing the anaerobic reactor plant debottlenecked the capacity limitations of the wastewater treatment facility, presenting the opportunity for increased market pulp production.