Septic tank is a basic sludge treatment facility and also a pretreatment facility for domestic sewage. Its functions are as follows:
- Ensure the environmental sanitation of the living community and avoid the spread of domestic sewage and pollutants in the living environment.
- In the working environment of anaerobic corrosion in septic tanks, kill mosquito eggs.
- Temporary storage of sludge, organic sludge undergoes anaerobic decomposition, and the matured organic sludge can be used as agricultural fertilizer.
- Pretreatment of domestic sewage (primary treatment), precipitate impurities, and hydrolyze macromolecular organic substances into small molecular organic substances such as acids and alcohols to improve subsequent sewage treatment.

















