A Simple Village Sewage Treatment System and the Effect of Application Case

Abstract

Under the country’s rural development call of “green development, rural revitalization”, in order to solve the problem of rural sewage treatment and recycling, we designed a simple village sewage treatment system based on AO treatment process. The system has the characteristics of small area, low construction and operation cost and good processing effect. Through the actual case of Quzhou Experimental Station of China Agricultural University, the removal rate of total phosphorus and ammonia nitrogen reached 50% and 93% respectively after one year of operation of the system. The COD content of wastewater is reduced from about 700 mg/L to 16 mg/L, and the removal rate is 98%, reaching the standard of farmland irrigation water (GB5084-2005). The treated water can be directly used for farmland irrigation water. The practical application case of Quzhou experimental station also shows that fish can survive in the treated sewage for a long time, which proves the treatment effect of this system. This system is worth popularizing and applying in countryside of our country.