快速渗滤和生物湿地综合系统处理农村生活污水的季节性运行效果分析

Analysis of Seasonal Operation Effects of CRI and WRSIS Integrated System on Rural Domestic Sewage

【目的】研究快速渗滤和生物湿地综合系统处理农村生活污水的季节性运行效果,为推广适宜农村地区的新型污水治理技术和方法提供参考和依据。【方法】在试区建立快速渗滤和人工生物湿地相连接的系统,分别按不同季节开展水质净化试验,将农村污水放入系统中,经由渗滤池和生物塘进行逐级处理,同时采集各环节的水样,测其总氮、总磷和化学需氧量的浓度,并与试验前的水质相比较,计算污染物的去除率,分析系统对农村生活污水的季节性去除效果。【结果】快速渗滤和生物湿地综合系统在试验期间对农村生活污水各种污染物均有较大的去除作用,在季节上其去除效果夏、秋季优于春、冬季,COD、TN、TP的去除率均在夏季最高,分别为92.2%、87.0%和85.9%,冬季相对较低,但也达到81.8%、76.1%、70.4%的去除水平。【结论】快速渗滤和生物湿地相结合的系统在各季节内均能正常运行,并有效去除各种污染物,在治理和修复农村生活污水方面具有良好的推广和应用前景。

【Objective】The seasonal operation effects of integrated system of Constructed Rapid Infiltration( CRI) and Wetland Reservoir Sub-Irrigation Systems( WRSIS) on rural domestic sewage were studied,in order to provide data reference and theoretical basis for popularizing new sewage treatment techniques and methods suitable for rural areas.【Method】The CRI and WRSIS connected system was established in test area,and conducted sewage purification test in spring,summer,autumn and winter. During the experiment,the rural sewage was put into infiltration filters and biological ponds for processing step by step,then collected water samples from all steps to measure the concentrations of TN,TP and COD; counted pollutant removal rate compared with the water quality before experiment,and analyzed the seasonal removal effect of system on rural domestic sewage.【Result】Integrated system of CRI and WRSIS had the great removal effects on various pollutants of rural domestic sewage during the experiment. In the season,the removal effects of summer and autumn were better than spring and winter. The removal rates of COD,TN and TP were highest in summer,reaching 92. 2 %,87. 0 % and 85. 9 %,while relatively low in winter,which also reached 81. 8 %,76. 1 % and 70. 4 %.【Conclusion】Integrated system of CRI and WRSIS operated normally in all seasons and effectively removed all kinds of pollutants. So the system had good popularization and application prospect in treatment and repair of rural domestic sewage.