Integrated treatment technology device for swine wastewater

摘要

An integrated device for treating swine wastewater, includes a main reaction tank 5, a step-feed inflow system 1, a stirring and diversion system, an aeration and oxygen supply system 2, a sludge diversion system 3 and a nitrification liquid reflux system 4. The main reaction tank includes a pre-treatment section 501, a pre-anoxic section 502, an anaerobic section 503, an anoxic section 504, a primary sedimentation tank 505, an aerobic section 506, an intermediate sedimentation tank 507, a membrane tank 508, a sludge tank 509, and a clear water tank 510 that are sequentially connected. The wastewater is subjected to flocculation by a microbial preparation in the pre-treatment section. The sludge diversion system comprises first 31, second 32 and third 33 sludge diversion systems that divide the sludge in the primary sedimentation tank, in the intermediate sedimentation tank and in the sludge tank respectively into two parts. The primary diversion system refluxes sludge into the anaerobic section and discharges sludge into the sludge tank. The second diversion system refluxes sludge into the pre-anoxic section and discharges sludge into the sludge tank. The third diversion system refluxes the sludge into the aerobic section and discharges sludge into a sludge treatment system.