2种野生植物砾石基质系统净化生活污水

Purification of domestic sewage by two kinds of wild plants gravel matrix system

以北水苦荬和巴天酸模2种本地野生植物为研究对象,通过构建小型砾石基质污水净化系统,研究其在不同运行时间下对生活污水的净化效果,并对各指标去除率进行Pearson相关性分析,探讨野生植物用于人工湿地的可行性。经过30 d的实验研究表明:对照组、北水苦荬组和巴天酸模组对生活污水中COD平均去除率分别为52.1%、55.8%、56.6%;对NH_3-N平均去除率分别为38.2%、43.6%、45.0%;对TN平均去除率分别为37.3%、42.9%、42.6%;对TP平均去除率分别为42.5%、45.6%、46.2%。各指标间去除率在湿地单元中表现出不同的相关性。

Two native wild plants, namely, Veronica anagallis-aquatica L. and Rumex patientia Linn, were studied to assess the feasibility of using these wild plants for wastewater treatment in constructed wetlands. Ex- periments were conducted in a small gravel matrix sewage purification system, and the effects of the plants on sewage purification were evaluated at multiple running times. Pearson correlation analyses were performed to de- termine the removal rates for each water quality indicator. The results achieved after one month showed that the average removal rates for the chemical oxygen demand （COD） were 52. 1% , 55.8% , and 56.6% in the control group, V. anagallis-aquatica L. treatment group, and R. patientia Linn treatment group, respectively. The av- erage removal rates for NH3-N were 38.2% , 43.6% , and 45% , respectively, the average removal rates for total nitrogen （TN） were 37.3% , 42.9% , and 42.6% , respectively, and the average removal rates for total phos- phorous （TP） were 42.5% , 45.6% , and 46.2% , respectively, for the above three treatment groups. The re- moval rates for each indicator varied somewhat in different wetland units.