两级土壤渗滤系统对高含氮有机废水的处理效果研究

Study on the Performance of a Two-Stage Soil Infiltration Treatment System Treating High Strength Nitrogen Wastewater

采用两级土壤渗滤系统处理含高浓度氨氮的人工配水和实际废水,在两级进水中投加原污水作为补充碳源,促进土壤渗滤系统的总氮去除效果.结果表明,在原污水化学需氧量(COD)浓度为861.2～1 686.3mg/L,总氮(TN)浓度为168.00～292.48mg/L,总磷(TP)浓度为10.26～20.50mg/L条件下,两级土壤渗滤系统对COD,TN,TP的去除率可以分别达到96.8%、94.5%和99.9%.两级土壤渗滤系统不仅能够加强土壤渗滤法对总氮的脱除效果,还可以保持COD,TP等指标的出水浓度更低、更稳定.

A two-stage soil infiltration system was used to treat synthetic and fermented swine wastewater containing high concentration of ammonium nitrogen.In order to enhance TN removal of the two-stage SIT system,raw wastewater was added as additional carbon resource into the influent of the second stage soil columns.The experimental results indicated that with concentrations of COD,TN,TP in the raw wastewater ranging between 861.2—1686.3mg/L,168.00—292.48mg/L and 10.26—20.50mg/L,the corresponding removal rates of them could reach 96.8%,94.5% and 99.9%,respectively.The two-stage soil infiltration system can not only strengthen TN removal effect of soil infiltration system,but also guarantee more stable effluents with low concentrations of other pollution indices such as COD and TP.