Biological ultrafiltration membrane sewage treatment device

The invention relates to the field of sewage treatment and in particular relates to a biological ultrafiltration membrane sewage treatment device. The sewage treatment is large in discharge value and low in cost, repeated washing can be realized, the service life is long, the gas production rate is high, the capacity of degrading COD is high, and the energy consumption is low. An opening in one end of a main pipeline of a bubbling tube is horizontally formed in the bottom of an aerobic biological reaction tank, and the open end extends to the outer part of the aerobic biological reaction tank and is communicated with an air blower; multiple micro-porous aeration tubes are arranged, multiple micro pores with the pore size of 0.2-200mu m are formed in the tube walls, and the multiple micro-porous aeration tubes are communicated with the main pipeline of the bubbling tube; a water pumping/sucking main pipeline is a hollow pipeline of which one end is open and is horizontally arranged in the aerobic biological reaction tank, and the open end of the water pumping/sucking main pipeline extends to the outer part of the aerobic biological reaction tank and is communicated with a water pumping/sucking pump; and multiple hollow micro-porous ultrafiltration membrane filter tubes are arranged, micro pores with the pore size of 0.02-200mu m are formed in the tube walls, and the open ends of the hollow micro-porous ultrafiltration membrane filter tubes are communicated with the water pumping/sucking main pipeline.