At present, there are two ways to discharge the feces extracted by sewage suction vehicles and dung suction vehicles, formal way and informal way. The following Wuhan Yinghao Machinery Equipment Company introduces several sewage discharge methods.

The excrement entering the factory is discharged into the receiving pool through the excrement extractor. After screening, the sewage enters the secondary biochemical system for treatment, and large substances such as garbage in feces are separated and sent to the landfill for treatment. The remaining sludge can be composted after concentration and anaerobic digestion, and the supernatant sewage enters the sewage treatment system for treatment and discharge. Biogas produced by anaerobic sludge treatment can be recycled.

This treatment method can completely treat the feces harmlessly, and all the indexes after treatment can meet the national emission standards. However, its construction investment and operation cost are large and its management is complicated. Without the cooperation of municipal sewage treatment plants, this is the basic choice for the harmless treatment of fecal sewage.