摘要
采用复合人工湿地系统对紫阳湖富营养水体进行净化工程性研究,在水力负荷为1 m3(/m2·d)的条件下,研究了上层表面流人工湿地单元、下层水平潜流人工湿地单元对紫阳湖水体中高锰酸盐指数、TN、TP等水质指标的去除效果。结果表明:下层水平潜流人工湿地单元对高锰酸盐指数、TN、TP的去除率分别为24.5%、23.1%、23.3%,上层表面流人工湿地单元对高锰酸盐指数、TN、TP的去除率分别为23.5%、13.3%、14.2%,上层人工湿地单元对氮、磷的去除效果比上层人工湿地单元高50%和40%,对高锰酸盐指数的去除效果两者差不多。另外,复合人工湿地对紫阳湖水净化效果较好,对高锰酸盐指数、TN、TP的平均去除率达到42%、33.2%和34.2%,出水浓度分别为9.60、2.01和0.23 mg/L,出水稳定可以为后续水体生态修复措施创造有利条件。
Combined constructed wetlands system was applied to treat eutrophic water of Ziyang Lake, Wuhan. Under the condition of loading rates 1 m3/（m2 .d）, up surface flow constructed wetland unit and down horizontal subsurface flow constructed wetland unit for the removal rates of CODMn, TN and TP were studied. Results showed that down horizontal subsurface flow constructed unit for the removal rates of CODMn, TN and TP were 24.5%, 23.1% and 23.3%, while up surface flow constructed wetland unit for removal rates of CODMn, TN and TP were 23.5%, 13.3% and 14.2%. TN, TP removal rates of down wetland unit were 50% and 40% better than up wetland unit, however CODMn removal rates for the both were almost the same. The experiment also demonstrated that the combined constructed wetlands system had stable effects on removal of CODMn, TN and TP, which can create a suitable condition for subsequent restoration, with average removal rates of CODMn, TN and TP as 42%, 33.2% and 34.2%, as well as average effluent concentration as 9.60 mg/L 2.01 mg/L and 0.23 mg/L.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第9期126-128,134,共4页
Environmental Science & Technology
关键词
富营养化水体
湖泊治理
复合人工湿地
去除率
eutrophic water
lake management
combined constructed wetlands
removal rate
