From this point forward, various substrates, including sewage sludge, have been isolated through anaerobic handling, seemingly forever. We both agree that an anaerobic digester is the best option because it uses a gas engine to burn methane to produce energy. At temperatures above 25 °C, anaerobic retention, which is essentially always possible in India, is likely to occur. Various wa... https://woggroup.com/industrial-process-water.html