The working principle of domestic sewage treatment equipment
Domestic sewage treatment equipment is a special equipment used to treat domestic sewage, and its working principle is mainly based on biochemical reactions. The equipment removes impurities such as organic matter, suspended solids, bacteria and viruses in sewage through physical, chemical and biological methods to achieve the purpose of purifying water quality.
First of all, the equipment intercepts large particles of impurities, such as gravel, fibers, etc., through the grille. The sewage then enters the grit remover to remove heavy particles such as sand and gravel through sedimentation. The effluent then enters the primary sedimentation tank, where the settling suspended solids are removed. At this stage, chemical precipitation may also be used to add chemicals to the effluent, so that some specific impurities react with the chemicals to form precipitates, which can be removed.
The effluent then enters the bioreactor. Here, the metabolism of microorganisms is used to decompose organic matter in the sewage. This process usually requires the supply of oxygen to support the growth and metabolism of microorganisms. The biological reactor is equipped with an aeration device, which can fully mix and contact the sewage with microorganisms through stirring and aeration, so as to improve the treatment efficiency.
After the treatment of the biological reactor, the sewage enters the secondary sedimentation tank. At this stage, most of the microorganisms and suspended solids are precipitated, allowing the water to be further purified. Finally, disinfection is carried out to kill microorganisms such as bacteria and viruses that may remain, ensuring that the effluent meets discharge standards or reuse requirements.
In the whole treatment process, the domestic sewage treatment equipment realizes efficient, stable and continuous sewage treatment through reasonable design and layout. At the same time, the equipment also adopts an automatic control system, which can monitor the water quality and treatment effect in real time, and adjust and control it as needed. This automated processing not only improves efficiency, but also reduces manual intervention and operational difficulty.