摘要
对江苏省昆山市一处作为河流旁侧净化系统的滨河城市广场表面流人工湿地工程实例进行了18个月的连续监测,考察了三级串联式表面流人工湿地对微污染河水的长期净化效能,并探究了温度和降雨冲击负荷的影响。结果显示,当水力停留时间为15 h时,人工湿地对SS、NH_3-N、NO_3^--N、TN、TP和CODMn的去除率分别为34.2%、38.4%、22.3%、29.1%、35.6%和31.5%;SS、NH_3-N、TP主要在湿地前、中段被去除,NO_3^--N和TN主要在湿地中、后段被去除;各污染物去除率均与水温存在非常显著的正相关性(p<0.01);在降雨冲击负荷下,部分污染物进水浓度出现一定程度的升高,而出水浓度差异并不显著(除CODMn),表面流人工湿地的水质净化能力较稳定。
This study implemented a continuous monitoring of a constructed wetland adjacent to a slightly polluted river in Kunshan City, Jiangsu Province for 18 months, explored the long-term treatment efficiencies for a slightly polluted river using three constructed surface flow wetlands in series, and the effects of temperature and rainfall on pollutants removal. The results showed that removal efficiencies of SS, NH3-N, NO3- -N, TN, TP and CODMn were 34.2% ,38.4% ,22. 3% ,29. 1% ,35. 6% and 31.5% , respectively, when HRT was 15 h. SS, NH3 -N, TP were generally removed in the first and the second wetlands, while NO3 -N and TN were removed in the second and the third wetlands. Tem- perature significantly affected pollutants removal efficiencies （p 〈0.01 ）. In wet weathers, some inflow pollutants increased to a certain degree, but no significant changes were identified in outflow （except for CODM. ） , showing the good resilience of the surface flow constructed wetland to rainfall.
出处
《中国给水排水》
CAS
CSCD
北大核心
2017年第5期55-60,共6页
China Water & Wastewater
关键词
表面流人工湿地
微污染河水
水质净化
城市广场
surface flow constructed wetland
slightly polluted river water
water treatment ef-ficiency
urban square
