Anaerobic digestion process methane

HYAN [Hybrid anaerobic] A process for treating the supernatant liquor from sewage sludge treatment plants by anaerobic digestion. The methane produced is burnt to provide heat for the treatment plant and to destroy odors. Developed by a Canadian consortium and operated at the Lakeview Water Pollution Control Plant, Mississauga, Ontario, from 1991. 

The acid-forming and methane-forming bacteria work simultaneously in the anaerobic digestion process. Oxygen is excluded from the digester and various other environmental conditions are controlled so that the methane-formers are maintained in balance with the acid-formers. Otherwise, the methane-formers would be inhibited and in some cases would cease to function entirely. 

Biological Process Stability. The anaerobic digestion process involves a complexity of interrelated biochemical reactions, many of which are not clearly understood. Anaerobic digestion therefore, has a poor reputation from a process-stability viewpoint. Municipal digesters are frequently attended by skilled operators with elaborate monitoring facilities at their disposal. The adoption of on-farm anaerobic digestion systems for methane production are unlikely to occur under such requirements for successful operation. 

Complete Mix Digester - A type of anaerobic digester that has a mechanical mixing system and where temperature and volume are controlled to maximize the anaerobic digestion process for biological waste treatment, methane production, and odor control. 

Ana.eroblc Digestion. Methane can be produced from water slurries of biomass by anaerobic digestion in the presence of mixed populations of anaerobes. This process has been used for many years to stabilize municipal sewage sludges for purposes of disposal. Presuming the biomass is all cellulose, the chemistry can be represented in simplified form as follows ... 

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