Sewage treatment is a problem that many enterprises and factories consider when constructing, so mastering the process flow of sewage treatment is crucial. Now let me introduce the process flow of sewage treatment to you.
Introduction to the process flow of sewage treatment
A. Kitchen and restaurant sewage first enters the oil separator to remove large particles and floating oil before entering the regulating tank.
B. Automatic grid: Set up a grid to remove large particulate matter and impurities in sewage, ensuring the continuous operation of subsequent treatment devices. The grid residue is regularly manually treated.
C. After removing floating debris, the sewage enters the regulating tank, where a submersible sewage pump is installed to lift the sewage; A mixing system is set up in the regulating tank for mixing to prevent dirt from settling.
D. Using an initial sedimentation tank to remove inorganic particles from wastewater and reduce subsequent treatment loads.
E. Adopting an anaerobic reaction tank, organic pollutants are hydrolyzed and acidified under anaerobic conditions under the action of microorganisms, hydrolyzing from high molecular weight fats, proteins, etc. to small molecular weight organic pollutants such as fatty acids and alcohols. On the other hand, the anaerobic reaction tank can control the oxygen supply according to seasonal process operation needs, allowing it to serve as an anaerobic tank or an aerobic tank, thus achieving flexible operation and control, And ensure that the treatment effect meets the treatment requirements.
F. The biochemical treatment part adopts the contact aerobic treatment process, which is a widely used and mature treatment process scheme. This scheme has a high removal rate of organic pollutants, which can not only effectively reduce BOD5, but also effectively remove ammonia nitrogen. Adopting a biological contact oxidation tank, the biofilm in this tank has a large surface area, can adsorb a large amount of organic matter in wastewater, and has strong oxidation ability. As organic matter is decomposed, the microbial body continues to grow and reproduce, which increases the number of biofilms. Due to the aging and death of microorganisms on the biofilm, the biofilm will detach from the surface of the filter material and then flow out of the pool with the wastewater.
Due to the adsorption effect of biofilms, a thin layer of water layer is often attached to its surface. The organic matter in the water is oxidized by the biofilm, and its concentration is much lower than that in the influent of the filter. Therefore, when the wastewater flows on the surface of the filter material, the organic matter will be transferred from the moving wastewater to the water attached to the biofilm surface and further adsorbed by the biofilm.
