串联式垂直流生态滤池处理农村生活污水的试验研究

对串联式垂直流生态滤池处理农村生活污水进行了为期5个月的现场试验研究。结果表明：通过该工艺,污水中的COD、氨氮、总氮和总磷等污染物均得到了有效去除,在进水COD、氨氮、总氮和总磷平均质量浓度为73.19、25.08、48.55、0.55 mg·L-1时,平均去除率依次为65.6%、71.6%、58.7%、86.9%。COD、氨氮和总磷的去除主要发生在第一级生态滤池的进水0～40 cm阶段,而总氮浓度基本呈均匀下降趋势。串联式生态滤池对各污染指标较好的去除效果也证明了其是一种适合农村分散式污水处理、解决农村污水肆意排放的新途径。

Experimental study on treatment of rural domestic sewage with serial vertical-flow filters

The domestic wastewater in rural areas was treated by serial vertical flow ecofilters in this pilot study.The results of 5 months showed that the pollutants,e.g.,chemical oxygen demand（COD）,ammonium-nitrogen（NH4＋-N）,total nitrogen（TN） and total-phosphate（TP） in the domestic wastewater was effectively removed by the serial vertical flow filters.When the concentrations in the influent were 212.84 mg·L-1 for COD,88.37 mg·L-1 for NH4＋-N,117.66 mg·L-1 for TN and 4.20 mg·L-1 for TP,the average removal efficiencies of the serial vertical flow eco-filters were 65.6%,71.6%,58.7% and 86.9% for COD,NH4＋-N,TN and TP,respectively.Due to deposition and adsorption,most of pollutants such as COD,NH4＋-N,TP were removed in the first stage（from inlet to 40 cm） of the serial vertical flow eco-filters.The removal of TN in the domestic wastewater was steady,with an even process along with the serial vertical flow eco-filters was steady.These results implied that the serial vertical flow eco-filters are capable for treating diffuse domestic wastewater,and have significantly potential to reduce wastewater pollution and protect environments in rural and similar areas.