Canteen sewage treatment scheme and process flow

There are aerobic microorganisms and digestive bacteria in the O-level biological pool, in which the aerobic microorganisms decompose organic matter into CO2 and H2O. Under the condition of sufficient oxygen supply, the nitrification of nitrifying bacteria oxidizes NH3-N to NO3-, and returns to the A-level biological tank through reflux control. Under the condition of hypoxia, the denitrification effect of the aerobic bacteria reduces NO3- to molecular nitrogen, and the effluent of the supernatant of the oxidation tank enters the sedimentation tank for sedimentation. The effluent of the supernatant of the sedimentation tank enters the clear pool for A short time, and the effluent is discharged according to the standard.