Application of Anaerobic Fermentation and Advanced Treatment of Pig Manure in Large-scale Pig Farms

In order to achieve the purpose of up-to-standard discharge of fecal sewage treatment, a new sewage treatment process was provided, that was the solid-liquid separation-black membrane anaerobic fermentation pond-hydrolytic acidification pond-coagulative precipitation tank-A/O-advanced treatment process. Through the practice and application of large-scale pig farms in Shanbian Village of Xudun Town in Jian'ou City by Fujian Xinxing Boar Breeding Co., Ltd., after the advanced treatment, the effluent chemical oxygen demand (COD_cr), the biological oxygen demand (BOD₅) and the ammonia nitrogen content (NH₃-N) were respectively 147.2 mg·L^-1, 28.6 mg·L^-1, and 7.6 mg·L^-1. The suspended matter concentration (SS) was 9.8 mg·L^-1. This process established a new up-to-standard discharge mode of pig manure treatment by means of the technology integration, which provided a demonstration application for the pig manure treatment and the sustainable development of pig farms in Fujian Province.