Sewage characteristics:

Domestic sewage is mainly divided into two categories: rural domestic sewage and urban domestic sewage:

Rural domestic sewage concentration is high, the concentration of organic matter is relatively high. Among them, COD, nitrogen and phosphorus, suspended matter and bacteria are the main pollutants, and the concentration of ammonia nitrogen, total nitrogen, total phosphorus and other pollution indicators is relatively low.

Urban domestic sewage contains starch, protein, cellulose and mineral oil and other organic matter, among which the chemical oxygen demand (COD), biological oxygen demand (BOD), total nitrogen (TN) and total phosphorus (TP) are relatively high.

Governance plan:

Engineering system is mainly rural sewage treatment in rural sewage family connection, on the basis of the construction of artificial wetland sewage anaerobic reactor, and high adsorption main pollution factor of plant, put into efficient sewage special microorganism decomposition, the use of natural ponds in purification, through five links, the treated sewage reached national the prescribed discharge standards.

The municipal sewage is mainly treated by flocculation separation, foam elimination, anaerobic and aerobic treatment and biological comprehensive treatment

。