This project is located in Wangdian Town, Xiuzhou District, Jiaxing City, Zhejiang Province. The nature of the sewage is rural domestic sewage. The project is distributed in Rockery and Nanmei Village (Xihe Village Site, Nanqiaotou 1 Site, Nanqiaotou 2 Site, and Jiangzhong Village Site). The treatment The standard is 5-20m3/d, and the treatment process of "grid sedimentation zone-anaerobic zone-facultative zone-aerobic zone-explosion biological filter-disinfection" is used to treat the effluent to meet the "Urban Sewage Treatment Plant Pollutant Discharge Standard" 》 (GB1918-202) Class B and above standards, that is, the incoming water quality is: PH6.5-9.5; CODcrs40Omg/L; BOD5s200mg/L; Ss 50mgL; NH -N6Omg(L; TN 3OmgAL; TPs5mglL When, the designed water quality requirements reach: CODcrs6Omg/; BOD5s20mg/; s s2O0mg/L; NH3-Ns8 (15 when the water temperature is lower than 12°C) mglL; TNs2UmglL; TPsimgL; PH 6~9. The treated water is discharged directly. to rural rivers.