Anaerobic biological treatment refers to the process of anaerobic respiration by anaerobic microorganisms in the absence of molecular oxygen to convert complex organic matter in water to methane and carbon dioxide and
release energy. Different from the aerobic biochemical treatment process, the hydrogen recipient of domestic sewage treated by anaerobic biological treatment is not molecular oxygen, but carbon, hydrogen, sulfur or combined oxygen. Therefore, H2, CH4 andH2S are usually produced in the treatment products of anaerobic biological reaction
