A biological and ecological composite treatment device for rural sewage treatment

The invention discloses a bio-ecological composite treatment device for rural sewage treatment, which comprises an anaerobic enhanced pretreatment pool, an aeration pool and an ecological pond separated from each other and connected in sequence. The anaerobic enhanced pretreatment pool includes three interconnected The pretreatment tank is connected with the aeration tank; the aeration tank is equipped with a combined packing, the three-way diversion pipe runs through to the bottom of the combined packing and is arranged opposite to the blast aerator, and the aeration tank is connected to the ecological pond; the ecological pond includes Two interconnected sub-ponds in series, each sub-pond includes a shallow wet area and a deep-water wet area, the deep-water wet area of ​​the upstream sub-pond is equipped with a floating bed inclined plate sedimentation combination device, and the deep-water wet area of ​​the terminal sub-pond is equipped with aquatic plants and fish; A sludge return pump device is installed in the ecological pond, and trees with dense crowns are planted on the surrounding banks. The invention optimizes the traditional process, prolongs the residence time of sewage, and improves the mixing degree of sewage and activated sludge; it has the characteristics of low cost, low operating cost, high efficiency and easy popularization.