水解酸化+中温UASB+生物接触氧化+人工湿地工艺处理规模化猪场废水的工程实践研究

STUDY ON COMBINED PROCESS OF "HYDROLYTIC ACIDIFICATION+UASB+ BIOLOGICAL CONTACT OXIDATION+ CONSTRUCTED WETLAND" FOR TREATMENT OF PIGGERY WASTEWATER

通过对水解酸化+中温UASB+生物接触氧化+人工湿地工艺处理规模化猪场废水的工程实践进行研究。结果表明,采用生物接触氧化池出水回流至UASB方式实现系统硝化与反硝化脱氮,氨氮去除率可达85.6%;采用化学除磷和生物处理相结合,系统对总磷的去除率可达90.7%。经该工艺处理后,出水水质可以达到畜禽养殖业污染物排放标准(GB 18596-2001),且吨水处理费用仅为0.85元。

The combined process of ＂hydrolytic acidification＋UASB＋biological contact oxidation＋constructed wetland＂ for treatment of piggery wastewater was studied in this paper. The results showed that nitrification and denitrification achieved by using the effluent of biological contact cxidation backflow to the UASB reactor, and the ammonia nitrogen removal rate achieved 85.6%. The phosphorus removal Late achieved 90.7% by, combining the chemistry and biology phosphorus process. The effluent treated by this system achieves the discharge standard of pollutants for livestock and poultry breeding, and the operation cost was only 0.85 RMB per ton.