水平潜流人工湿地复合系统净化农村高浊度富营养化水体的研究

REMEDIATION OF RURAL HIGH TURBID AND EUTROPHIC WATER BY USING SUB-SURFACE HORIZONTAL FLOW INTEGRATED CONSTRUCTED WETLANDS SYSTEM

采用氧化塘和人工湿地组成水平潜流人工湿地复合系统处理上海市崇明岛前卫村某河流高浊度富营养化水体。氧化塘内的生态纤维填料强化了微生物的种类和浓度,形成了藻菌共生体系;人工湿地内的基质陶粒比表面积大,易于微生物附着生长和吸附悬浮颗粒物。研究结果表明,COD、TN、TP、浊度、浮游植物的去除率较高,年平均去除率分别为50.5%、38.3%、51.5%、88.6%和31.6%,TDP、NH4+-N的去除率较差,去除率分别为15.4%和16.5%,处理效果呈现出季节性变化,夏季净化效果最好;在湿地植物选择上,香蒲的净化效果要优于灯芯草。

The sub-surface horizontal flow integrated constructed wetlands system was adopted to treat the rural high turbid and eutrophic water at Qianwei Village of Chongming Island in Shanghai. The sub-surface horizontal flow integrated constructed wetlands system was combined with oxidation pond and constructed wetlands. Ecological fiber media reinforced the functions of microorganism to form the mutualism relationship between algae and bacteria in the pond. Ecological ceramic particles with specific surface area in constructed wetlands were liable to the microbial biofilm formation and suspended particles absorption. As a result, the removal rate of COD ,TN,TP ,turbidity and phytoplankton were good. And the average removals were 50.5%, 38.3 %, 51.5%, 88.6% and 31.6%, respectively. The removal rate of TDP and NH4^＋-N were bad. And the average removals were just 15.4% and 16.5% .The treatment efficiency was changed from season to season. And the best time was summer. In the choice of wetland plants, Typha angustifolia＇s removal rate is superior to Rush.