The invention discloses a structure and a method for treating
sewage through
coupling a multi-point water inlet
biological membrane with a
phosphorus absorption device. The method comprises the following steps: enabling
sewage to simultaneously enter a primary anoxic area, a secondary anoxic area and a
biological membrane area via a water inlet
pipe, wherein the water inlet proportion is (3:1)-(1:1); subsequently, enabling the
sewage to flow through all stages of anoxic areas and aerobic areas in a bending-flow form through a communicating
pipe, performing front pretreatment on the sewage in the primary anoxic area, removing
nitrogen by utilizing return
sludge, entering the primary aerobic area to remove organic matters and
ammonia nitrogen, mixing
effluent water from the primary aerobic area and inflow water from the secondary anoxic area, further removing
nitrogen in the primary aerobic area, further removing organic matters and
ammonia nitrogen in the secondary aerobic area, enabling the treated sewage to enter a
sedimentation tank, enabling
effluent water from a liquid supernatant on the surface of the
sedimentation tank to enter the
phosphorus absorption device, discharging from the bottom after absorption, absorbing
phosphorus and dissolved and suspended pollutants in the sewage through the phosphorus absorption device and cleaning through a
backwashing pump after
absorption saturation. The structure and the method disclosed by the invention are particularly suitable for the field of deep nitrogen and phosphorus removal of middle and
small town domestic sewage and industrial
wastewater.