本源微生物菌剂治理垂直流人工湿地堵塞问题

Research on Vertical Flow Constructed Wetland Clogging Treatment with Origin-Microorganism Bacteria

为了解决垂直流人工湿地的堵塞问题,将直接投加本源微生物菌剂的水处理技术与人工湿地相结合,采用"预处理+改善基质"的方法,对进入湿地前的水体投加本源微生物菌剂以降低进入湿地的污染负荷,并在湿地的基质中掺加固化后的本源微生物菌剂来降解堵塞湿地的淤积物质,由此治理湿地堵塞并提高污水处理效率。以深圳市甘坑河和甘坑人工湿地为例进行治理,经治理一个月后,人工湿地出水水质达一级排放标准,各项指标的去除率为:COD,80%～90%;BOD5,85%～95%;氨氮,75%～85%;总磷,55%～65%。从2005年治理至今人工湿地仍运行良好,结果表明,此种方法能够使人工湿地恢复其污水处理能力,解决人工湿地堵塞问题。

In order to solve the substrates clogging problems of vertical flow wetlands, a method is proposed that ＂water pretreatment -k substrates improvement＂ by adding origin-microorganism bacteria. It combines the bacteria water treatment technology with con- structed wetlands, water pretreatment means adding origin-microorganism bacteria before water flows into wetlands, which can re- duce the pollution load entering the wetlands; substrates improvement means adding origin-microorganism bacteria into substrates of the wetlands, which can degrade siltation substances that clog wetlands. The clogging treatment of Gankeng River and Gankeng con- structed wetland in Shenzhen is used as an example, the wetland water quality reaches the primary emission standard after treatment for one month. Pollution indicators removal rates are COD, 80%-90% ; BOD5, 85%-95 %; ammonia nitrogen, 75%-85% ; total phosphorus, 55 %-65%. So far the constructed wetlands have worked well since treatment from 2005, the results show that by u- sing this method, the constructed wetland restores its sewage treatment capacity, clogging problem is resolved.