Distributed domestic sewage treatment device and ventilation method

The invention relates to the technical field of sewage treatment, and discloses a decentralized domestic sewage treatment device and a ventilation method.The decentralized domestic sewage treatment device comprises a tank body and a support, a sewage inlet pipe is arranged on the left side of the tank body, and a spraying mechanism is arranged at the tail end of the sewage inlet pipe through a flange plate; the spraying mechanism comprises a first water conveying pipe, a flow divider, a mounting part and a spraying head, the first water conveying pipe is fixedly mounted at the tail end of the sewage inlet pipe, the flow divider is fixedly mounted at the tail end of the first water conveying pipe, and the mounting part is fixedly mounted at the bottom of the first water conveying pipe. According to the distributed domestic sewage treatment device and the ventilation method, a biological membrane method is adopted as a main biological treatment method, the degradation effect of microorganisms is fully utilized,