According to different levels, sewage sludge sewage treatment can be divided into secondary treatment and tertiary treatment. The primary treatment is basically suspended in solid waste, mainly by interception and sedimentation, and petroleum physical methods. Second, the main task of wastewater treatment is to greatly remove colloid and dissolved organic pollutants, and adopt activated sludge process, that is, biological treatment membrane. 3 treatment and advanced treatment, the purpose of which is to remove suspended solids, inorganic substances and other pollutants from wastewater. The commonly used methods are mainly physical and chemical methods, such as process adsorption, ion exchange, coagulation and precipitation, oxidation, etc.

Urban sewage enters the secondary discharge tank (secondary tank) for decanting separation after being subjected to grid, primary discharge tank (sedimentation tank), removal of suspended solids and gravel, and large-scale aeration biological treatment. The separated sludge flows back to aeration after precipitation, and the other part is transported out by comprehensive utilization after concentration, digestion and dehydration. The secondary discharge water is disinfected by chlorination tank for advanced treatment or discharge.

Water treatment:

The basic principle of water->; Alum is added and precipitated->; & gt- and chlorine.

First, select appropriate water pipes and pipelines, and kill algae, chlorinated plants and shellfish with water pump and water pump (1) and before the water pump. It is pumped to the factory treatment system by the first-stage water pump. After mixing (usually adding an appropriate amount of aluminum to the source water, commonly known as ""), settling, filtering and disinfection, each process and the corresponding structure (such as filter, water leakage in the clean water tank, etc.), after disinfection, generally chlorine and ammonia are put into the disinfectant clean water tank, and the water is pumped in the tank for about an hour, and the water is qualified by the secondary pump (by) for drinking and production.