Pretreatment method of sewage sludge usign a mixture of eznymes and treatment method of sewage sludge by anaerobic digestion

摘要

An example of the present invention provides a sewage sludge pretreatment method comprising the step of adding a crude enzyme solution mixture to sewage sludge and reacting under aerobic conditions. The crude enzyme solution mixture is a mixture of the culture supernatant of strains screened from sewage sludge, and has high proteolytic enzyme activity and lipolytic enzyme activity. The content of Suspended Solids) is greatly reduced, making it very suitable for biogas production by anaerobic digestion. Therefore, the sewage sludge pretreatment method according to an example of the present invention has an advantage applicable to a full-scale facility for economically treating sewage sludge.