人工湿地技术处理农村生活污水效果研究

Study on the Effect of Constructed Wetland Technology on Rural Domestic Sewage

在探讨了人工湿地在农村生活污水处理中的研究进展基础上,以湖北省荆门市沙阳县某农村的生活污水为处理对象,连续布设了两个人工湿地,在每个湿地中分别布设不同的基质,采用沉砂池+2个水平潜流式人工湿地进行处理,分析了每个湿地进出水中TN、TP、COD和NH3-N污染物浓度值以及去除率,结果表明:水平潜流人工湿地在处理农村生活污水时对废水中COD有较好的去除能力,COD的去除率在80%左右;采用多个人工湿地综合运用能明显的提高污水中污染物的去除效果,当湿地中布设瓜子皮、砂石等基质时污染物去除效果比砂效果好;温度能影响人工湿地中植物的生长,且对植物吸附污染物能力有较大影响,各污染物浓度在夏季去除效果比冬季较好。

Based on the research progress of constructed wetland in rural domestic sewage treatment,taking domestic sewage from Shayang county of Jingmen city as treatment object,two domestic wetlands with different substrates were built,and grit chamber and 2 horizontal subsurface flow constructed wetlands were used to treat the domestic sewage.The concentration values and removal rates of TN,TP,COD and NH3-N in each wetland influent and effluent were analyzed.The results showed that,the subsurface flow constructed wetland had good removal ability of COD in wastewater during treating rural domestic sewage,and the removal rate of COD was about 80%;the comprehensive utilization of multiple constructed wetlands obviously improved the removal effect of pollutants in sewage.When melon seed skin,sand and stone were used as the substrate in the wetland,the pollutant removal effect was better than the sand effect;the temperature could affect the growth of the plant in the constructed wetland,and had a greater impact on the adsorption capacity of the plant to pollutants,so removal rate of pollutants in summer was better than that in winter.