The psychrophilic methanogens application in anaerobic biological treatment and research on cold-adapted mechanism

Anaerobic digestion technology of organic waste is considered sustainable and optimum. However, the process of anaerobic digestion at mesophilic and thermophilic temperatures is well understood and applied, psychrophilic temperatures treatment has not been explored widely which could reduce operation cost considerably. This review states the research progress and cold-adapted mechanism of psychrophilic methanogens. Moreover, some new research theory and technology on psychrophilic methanogens were proposed. The application and prospect of anaerobic digestion at low temperature were also discussed.