垂直流人工湿地技术在北方污水处理及回用工程中的应用

Vertical Flow Constructed Wetland Used for Sewage Treatment and Reuse Project in North China

以垂直流人工湿地为核心的污水处理系统用于天津某镇污水处理及回用,系统去除效果好,运行稳定,出水可作为人工湖的补水。外界温度为20～30℃时,整个系统对CODCr、BOD5、SS、NH3-N和TP平均去除率分别为89.2%、95.4%、92.3%、89.8%和92.2%;外界温度为-6～4℃时,整个系统对CODCr、BOD5、SS、NH3-N和TP平均去除率分别为86.7%、94.2%、89.6%、84.0%和89.8%。人工湿地污水处理系统可通过优化运行参数来减少低温对系统造成的不利影响。

Vertical flow constructed wetland was used for treating wastewater in a town of Tianjin.The vertical flow constructed wetland was the core unit of sewage treatment system.The operation results showed that the removal effect of pollutant was good,and the outflow water could supply reclaimed water for artificial lake.When the outside temperature was between 20 and 30 ℃,the average removal rates of CODCr,BOD5,SS,NH3-N and TP were as high as 89.2 %,95.4%,92.3%,89.8% and 92.2%.When the outside temperature was between-6 and 4 ℃,the average removal rates of CODCr,BOD5,SS,NH3-N and TP were as high as 86.7%,94.2%,89.6%,84.0% and 89.8%.The adverse effects of low temperature could be reduced by optimizing running parameters.