Domestic sewage treatment equipment is a device used to treat sewage in daily life. Application of ambient temperature anaerobic fermentation technology in small-scale domestic sewage purification biogas digesters.

According to the principle of "multi-stage self flow, step-by-step degradation", a new device for first stage anaerobic fermentation and second stage facultative digestion filtration is established. It consists of processes such as anaerobic fermentation, facultative digestion filtration, sewage reflux, and packing.