Subventions et des contributions :

Subvention ou bourse octroyée s'appliquant à plus d'un exercice financier (2017-2018 à 2020-2021).

The wastewater treatment industry is undergoing a major transformation by increasingly focusing onx000D
wastewater resource recovery instead of simply wastewater treatment. Energy is an important resource that canx000D
be recovered from wastewater, and several facilities aim at operating energy neutral processes. At the samex000D
time, biosolids disposal is a major operational expense as it can use up to 60% of a facilities yearly budget. Thex000D
current proposal aims at tackling this combined problem by both minimizing biosolids production and byx000D
maximizing biomethane yields. This will be accomplished though treating waste activated sludge (WAS) withx000D
ozone to enhance it degradability in anaerobic digestion, and though operating the anaerobic digesters atx000D
psychrophilic (20°C and lower) temperatures. The ozone treatment will allow the operation of thex000D
psychrophilic anaerobic digester at high rates, which corresponds to solids retention time (SRT) equal or lowerx000D
than 20 days. Thus, beside the decrease in operation temperate, the operation of the digesters will not bex000D
modified substantially from the typical conditions. The enhanced degradability of the WAS will alsox000D
potentially create additional process capacity, which may reduce capital investments for the water resourcex000D
recovery facilities (WRRF). This new process will be the first of its kind by which the hydrolysis action ofx000D
ozone will be used to reduce the digester operation temperature and directly increase the biogas output whilex000D
maintaining a relatively low SRT. The current NSERC-CRD proposal is joint with an NSERC-ARD proposalx000D
presented by the Centre National en Électrochimie et en Technologies Environnementales (CNETE; affiliatedx000D
with the Collège Shawinigan). The new process developed through the proposed project, which will bex000D
commercialized by Air Liquide and its partners, will likely provide important economic and environmentalx000D
benefits to the Canadian wastewater resource recovery industry. It will also generate employment within Airx000D
Liquide and its partners for commercializing, manufacturing, and installing the new processes.