Method for employing anaerobic-aerobic combined biological filter to process domestic sewage

A method for employing anaerobic-aerobic combined biological filter to process domestic sewage relates to a method for processing domestic sewage. The invention solves the problems of poorer effects for removing P and N, poor effluent quality, and being hard to achieve the regulated discharge standard of the existing domestic sewage processing technique. The detail steps of the invention are as follows: the domestic sewage enters a pre-processing system, a biological flocculating constituent filter sedimentation tank, a BIOFOR anaerobic biological filter, a BIOFOR aeration biological filter, and an ultraviolet disinfecting device in sequence and then is discharged. The BIOFOR anaerobic biological filter is mainly used for denitrifying denitrification under the anaerobic conditions; the BIOFOR aeration biological filter is mainly used for removing the ammonia nitrogen and rest COD in the water and accomplishing the chemical P removing in the BIOFOR aeration biological filter. The invention employs the combination of the BIOFOR anaerobic biological filter and the BIOFOR aeration biological filter to process the domestic sewage; the P and N removing effects are good and the rest mud amount is less. Various indexes of the processed water body all can achieve the regulated standard and can completely realize automatization control.