Sewage flows out of septic tank and enters the grille. The grille is used to intercept the floating matter and suspended matter in the sewage, and then enters the regulating pool. After adjusting the water quantity and homogenizing the water quality in the regulating pool, the sewage is pumped into the A-level acidizing pool by the sewage lifting pump, in which the sewage is hydrolyzed and acidified, and the macromolecular organic matter which is difficult to biodegrade is decomposed into small molecular organic matter which is easy to biodegrade
At the same time, the reflux sludge from the subsequent secondary clarifier was used for denitrification by facultative microorganisms, and nitrite and nitrate produced by nitrification in the O-grade oxidation www.yijingguan.cnwww.pingdifengtou.cnwww.xingtaibaojie.com.cn www.diandongmenn.com.cnwww.daishiganzaoj.cnwww.shidiaopenqua.cntank were reduced to N2 or N2O or NO. The effluent of A-level acidification tank flows into O-level oxidation tank. Because of the hydrolytic acidification of the sewage in front of it, the biodegradability of the sewage is greatly improved, and a large number of microorganisms are used to completely remove the organic matter in the sewage.
At the same time, ammonia nitrogen (NH3-N) in sewage was converted into nitrite (NO2-) and nitrate (NO3-) by nitrification with aerobic microorganisms, which provided good conditions for denitrification in A-grade acidification tank.