生物滴滤池-人工湿地组合处理生活污水规律研究

Research on law of composite process of biotrickling filter and constructed wetland for domestic wastewater treatment

采用生物滴滤池-人工湿地组合工艺,研究了在滴滤池的水力负荷为1.0m3·m-2·d-1、人工湿地的水力负荷为0.125m3·m-2·d-1的条件下,组合工艺对模拟生活污水中污染物的去除规律.实验结果表明:采用活性污泥挂膜法可以达到快速启动滴滤池反应器的目的.组合工艺对CODcr、NH4+-N、TN和TP的平均去除率分别达到了96.2%、95.6%、91.2%和93.9%.CODcr和NH4+-N的去除主要在滴滤池内完成.滴滤池对TN、TP的去除率分别为51.2%、39.7%,人工湿地对TN、TP的去除贡献分别为48.8%、60.3%.组合工艺运行141天后,人工湿地出水TP浓度不断升高,说明填料的吸附达到饱和.

The composite process of biotrickling filter and constructed wetland was used to treat simulated domestic wastewater. The contaminant removal efficiency of composite process was investigated under the conditions of hydraulic loading of biotrickling filter of 1.0 m^3 · m^-2· d^-1. The results showed that the rapid start-up process of reactor was implemented by using the method of artificial inoculation with activated sludge. The average removal efficiencies of CODcr,NH4＋-N,TN and TP were 96.2%,95.6%,91.2% and 93.9%,respectively. Most parts of CODer and NH4＋-N were removed in biotrickling filter. The contributions of TN,TP removal of biotriekling filter were 51.2% ,39.7%, respectively. The contri- butions of TN, TP removal of constructed wetland were 48.8 %, 60.3 %, respectively. The TP concentration of effluent of constructed wetland increased constantly with the time after 141 days. This illustrated that the absorption abilities for TP reached the saturated binding.