The present invention relates to a domestic sewage treatment apparatus, comprising a first biochemical tank and an upward flow type aeration biofiltration tank, wherein an outlet port is formed below the tank of the first biochemical tank, and a bottom of the biochemical tank A second aeration pipe is provided in a lower portion of the filtration tank, a filter medium layer is provided in an upper portion of the filtration tank, and a water collecting tank is provided around the tank body in the upper portion of the filter medium layer of the filtration tank And the second aeration pipe is mounted to be supported by the shut-off net, and the tank of the filtration tank below the shut-off net is provided with an inlet port , The tank body of the filtration tank is provided with a lower outlet port, and the outlet port of the primary biochemical tank is connected to the first port It is connected to the valve, sewage grinding pump, flow control valves, flow meters and up-flow type and sequence of aeration ipsugu biological filtration tank. The filtration tank of the apparatus is uniform in the influent water in the process, the flow of water is stable, and the water quality of the treated wastewater through the same time with the same water quality is small, and thus the quality of the outgoing water quality can be secured.
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