摘要
生活污水经过二级处理后的废水中仍含有相当数量污染物,尤其是N、P含量较高.采用表面流人工湿地处理系统,选取了3种常见的水生植物:香蒲、浮萍和芦苇作为主体植物进行废水的深度处理研究.试验结果表明,在水力负荷为0.04 m3/m2.d时,三类人工湿地系统均有较好的效果,对BOD5的平均去除率分别为83.9%、82.6%和77.1%;对NH3—N的去除率分别为80.4%、81.5%、74.2%,对TN的去除率分别为37.0%、50.6%和36.2%;对TP的去除率分别为71.9%、72.2%和69.7%;采用一级反应动力学方程对试验数据进行拟合,得到了该试验条件下污染物去除的反应速率常数.
The effluent from second biological wastewater treatment plants has some pollu- tant, especially about of N, P contaminants. This paper selected three surface flow construc- ted wetland systems with different plants: cattail, duckweed and reed to refine the wastewater said above. It was found out that three constructed wetlands had good purification effect. When hydraulicloads of these system were O. 04 m3/m2 . d, the removal rate of BOD5 was 83.9% ,82.6% and 77.1% , respectively. While the NH3-N had the removal rate of 80. 4% ,81.5% and 74.2% ,the TN had the removal rate of 37.0% ,50.6% and 36.2% ,the TP had 71.9% ,72.2% and 69.7%, respectively. The reaction rates of pollutant removal under the experimental conditions were computed by fitting the experimental data using first -order kinetics equation.
出处
《哈尔滨商业大学学报(自然科学版)》
CAS
2012年第2期162-165,共4页
Journal of Harbin University of Commerce:Natural Sciences Edition
基金
国家科技支撑计划课题(2008BAJ08B13)
关键词
人工湿地
生活污水
深度处理
水力负荷
constructed wetlands
domestic sewage
advanced treatment
hydraulicload