Analysis on the Application and Operation of Sewage Treatment Technology on Large-scale Pig Farms

In order to achieve the goal of meeting the discharge standards of fecal sewage treatment, a new sewage treatment process was provided, that is, feedwater regulating reservoir+solid-liquid separation+CSTR anaerobic fermentation tank+dissolved air floatation 1+A/O+BBAF+dissolved air floatation 2+disinfection process. Through the practice application of Fujian Yongrun Agricultural Development Co., Ltd. in Shuangyuan Village, Zhengdun Town, Songxi County of Nanping City, the results showed that by means of technology integration, the sewage treatment reached the preset target, and the effluent quality indexes of COD 187.4 mg·L^-1, BOD₅ 81.4 mg·L^-1, NH₄⁺-N 71.8 mg·L^-1, TP 7.3 mg·L^-1 and SS 84.7 mg·L^-1 all met the requirements of GB18596-2001 pollutant discharge standards for livestock and poultry industry, which have effectively treated the organic pollutants in sewage and achieved the sustainable development of fecal sewage treatment on pig farms.