The biofilm method is to attach microorganisms to the surface of the carrier. When the sewage flows through the surface of the carrier, through the adsorption of organic nutrients, the diffusion of oxygen into the biofilm, and the biological oxidation that occurs in the film, the pollution Decompose the substance.

Sewage treatment is a variety of economical, reasonable, scientific, and effective treatment methods for domestic sewage,

Constructed wetland is a comprehensive ecosystem. It applies the principles of species symbiosis, material recycling and regeneration in the ecosystem,

Activated sludge method is a kind of aerobic biological treatment method of sewage, invented in 1912 by Clark and Gage of the United Kingdom. Nowadays, the activated sludge method and its derivative and improved processes are the most widely used methods for treating urban sewage.

Sewage treatment is a variety of economical, reasonable, scientific and effective treatment methods for domestic sewage, industrial wastewater and urban sewage

Physical method: physical or mechanical separation process. Filtration, precipitation, centrifugal separation, floating, etc.

Physical method: physical or mechanical separation process. Filtration, precipitation, centrifugal separation, floating, etc.