Good oxygen biochemical treatment system of sewage

The utility model discloses a good oxygen biochemical treatment system of sewage, including return sludge device, the water installations who connects gradually, biochemical reactions device and mud -water separation device, the mud -water separation device passes through the return sludge device and is connected with the biochemical reactions device, the biochemical reactions device includes biochemical reactions ware and aeration mechanism, aeration mechanism is connected with the biochemical reactions ware, the inner chamber of biochemical reactions ware is equipped with 2 dismantled and assembled baffles, 2 initial response district, second reaction zone and third response district are separated into with the inner chamber of biochemical reactions ware to the baffle, initial response district and second reaction zone all are connected with water installations, third response is connected with the mud -water separation device in the district. The utility model discloses multiple wastewater treatment process is as an organic whole for the collection, can according to actual need realizes different wastewater treatment process's conversion, can appraise each process flow and technological parameter's treatment effeciency and economic nature, have the technology combination nimble changeable, adjust convenience, advantage that equipment is simple.