Small rural domestic sewage treatment equipment purification tank facilities

Small rural domestic sewage treatment equipment purification tank facilities

Process standard principle

(1) Strictly implement the national regulations on environmental protection to ensure that the effluent indicators meet the national and local standards for pollutant discharge;

(2) Adopt the current domestic mature and practical treatment process to achieve the treatment objectives stably and reliably;

(3) Under the above premises and requirements, achieve low investment and low operating costs;

(4) The technical route is simple and clear, and the operation management is convenient;

(5) According to local conditions, a sewage treatment station with beautiful appearance and coordination with surrounding buildings shall be built on the existing site.

Small rural domestic sewage treatment equipment purification tank facilities working principle

The removal of organic pollutants and ammonia nitrogen by integrated sewage treatment equipment mainly depends on the AO biological treatment process in the equipment. The working principle is at Level A. Because of the high concentration of organic matter in the sewage, the microorganism is in a state of gas deficiency. At this time, the microorganism is a facultative microorganism, which converts and decomposes the organic ammonia in the sewage into NH3-N. At the same time, the organic carbon is used as an electronic donor to convert NO - 2-N and NO - 3-N into N2. In addition, some organic carbon sources and NH3-N are also used to synthesize new cell substances. Therefore, Class A tank not only has a certain organic matter removal function, reduces the organic load of the subsequent aerobic tank, but also facilitates the nitrification. It also relies on the high concentration of organic matter in the raw water to complete the denitrification and ultimately eliminate nitrogen eutrophication pollution.

Small rural domestic sewage treatment equipment purification tank facilities At Grade O, the concentration of organic matter has been greatly reduced, but a certain amount of organic matter and higher NH3-N still exist. In order to further oxidize and decompose the organic matter, and at the same time, nitrification can be carried out smoothly when the carbonization is completed, aerobic biological contact oxidation tank with lower organic load is set at Level O. There are mainly aerobic microorganisms and aerobic bacteria (nitrifying bacteria) in the O tank. Aerobic microorganism decomposes organic matter into CO2 and H2O; Autotrophic bacteria (nitrifying bacteria) use inorganic carbon generated from organic matter decomposition or CO2 in the air as the nutrient source to convert NH 3-N in sewage into N 2-ON, N 3-ON, and the effluent from the O level pool returns to the A level pool to provide electronic receptors for the A level pool, and finally eliminate nitrogen pollution through denitrification.