人工湿地工艺在污水处理中的应用优势分析

Analysis on Advantages of Constructed Wetland in Sewage Treatment

【目的】研究人工湿地工艺在污水处理中的作用,明确人工湿地工艺运行机制,为污水处理行业提供借鉴。【方法】以实际监测数据就当前国内生活污水处理常用的氧化沟工艺、ICEAS工艺及垂直流人工湿地工艺对CODCr、BOD5、SS、TP、TN这5项指标的处理现状作了分析比较。【结果】人工湿地工艺相对于其它两种工艺表现出了更加优秀的处理能力,CODCr、BOD5、SS、TP、TN等5项指标的去除率均相对较高。应用人工湿地工艺的污水处理厂CODCr、BOD5、SS、TP等4项指标的年平均去除率均达到了90%及以上,TN的去除率也可达80%。【结论】从处理效果、投资及运营成本等各方面来看,人工湿地应用在中小型污水处理厂生活污水的处理中表现出突出的优势。将人工湿地工艺运用在污水处理中可大大提高污水的处理效率,还可降低运行成本。

[ Objective ] The objective of this study is to clarify the role and the operation mechanism of ＇artificial wetland process, and to provide reference for the sewage treatment industry. [ Method] Actually monitoring data from three kinds of current domestic sewage treatment methods which are oxidation ditch process, ICEAS process and vertical flow of artificial wetland process were analyzed and compared in the paper. [ ResultlThe removal rates of CODer, BODs , SS, TP and TN in artificial wedand process was relatively high, and this result shows that it has a better processing capability than the other two processes. The annual average removal rates of CODer, BOD5 , SS and TP in sew- age treatment plants with artificial wetland process reached 90 % , and the removal rate of TN was up to 80 %. [ Conclusion ] From the aspects of processing effect, investment and operation cost, the application of constructed wetland has been outstanding in the treatment of domestic sewage in small and medium-sized sewage treatment plant. The use of artificial wetland process in sewage treatment not only can greatly improve the efficiency of sewage treatment, but also reduce operating costs.