复合填料土壤渗滤系统处理农村生活污水的效果

为了加强农村生活污水综合治理,本研究以农村生活污水为研究对象,选择了以粉煤灰和腐熟牛粪作为填料配合土壤的2套不同装填方式的土壤渗滤系统,分别用于去除污水中的COD、总磷、总氮和氨氮.系统1对COD、总磷、总氮和氨氮的平均去除率分别为85.8%、98.1%、78.4%和93.7%,系统2的去除率分别为87.1%、96.0%、73.4%和95.5%.结果表明,两系统对污水中的污染物均有较好的去除效果.通过方差分析比较两系统的去除效果发现,装填方式对COD去除效果影响不大,而对总磷、总氮和氨氮的去除效果差异显著.但从污水处理效果综合比较,以分层装填方式的系统1对污染物的去除效果优于全混合装填方式的系统2.

Effect of rural decentralized sewage treatment by composite filler SIS

In order to strengthen the comprehensive management of rural sewage, two soil infiltration systems (SIS) were established to examine their removals for COD, total phosphorus (TP), total nitrogen (TN) and ammoniacal nitrogen (NH3-N) in rural sewage, where the fly ash was layered at two different depths of the column filled with soil-decomposed cow dung mixture in system 1(S1) and was fully mixed with the soil-decomposed cow dung mixture in system 2(S2). The average removal rates of COD, TP, TN, NH3-N for S1 were 85.8%, 98.1%, 78.4% and 93.7%, respectively, and for S2 were 87.1%, 96.0%, 73.4% and 96.0%, respectively. Among the removal effects of these two systems, significant difference in the TP, TN and NH3-N removal but little effect on COD were observed. From the comprehensive comparison of these two sewage treatments, S1 had better removal effect than S2.