无植物潜流人工湿地基质床污染物去除性能研究  

Study on pollutant removal ability of unplanted subsurface flow constructed wetland beds

作　　者：刘霄 黄岁樑[1] 刘学功[2] 

机构地区：[1]环境污染过程与基准教育部重点实验室,天津市城市生态环境修复与污染防治重点实验室,南开大学环境科学与工程学院水环境数值模拟研究室,天津300071 [2]天津市水利科学研究院,天津300061

出　　处：《环境污染与防治》2013年第4期7-13,共7页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.51079068);国家水体污染控制与治理重大专项(No.2008ZX07314-005-001;No.2009ZX07209-001);天津市科技支撑计划重点项目(No.09ZCGYSF00400)

摘　　要：采用单一基质页岩和页岩、陶粒组合基质进行无植物潜流人工湿地基质床的水质净化实验,比较不同基质设置对COD、TN、NH4+-N、TP、溶解性总磷(TDP)和溶解性正磷酸盐(SRP)去除效果的影响。结果表明,在相同进水水质,水力负荷为480mm/d的运行条件下,以单一页岩为基质的无植物潜流人工湿地基质床的COD、TN、NH4+-N、TP、TDP、SRP去除效果均略优于填充页岩和陶粒组合基质的基质床。总体来看,基质对湿地系统中各污染物去除的贡献均不是非常显著,并且不能保证长期稳定的运行效果。沿程去除结果表明,无植物潜流人工湿地基质床对COD、NH4+-N、TP的去除主要发生在进水后沿程的0～90cm距离内。水力负荷和基质设置均可能影响基质床的污染物去除效果,以基质选择为目的的批量吸附实验结果不能完全反映基质床的全面去污性能。Two polite scale unplanted subsurface flow constructed wetlands, with single shale and mixture of shale and haydite as substrate separately, were established for water purification. The effect of substrate material on COD, TN, NH＋-N, TP, （total dissolved phosphorus） TDP and （soluble orthophosphate） SRP removal was investi gated. Under the same influent quality and hydraulic load （480 mm/d）, the pollutants removal efficiency of shale substrate was slightly higher than that of mixture substrate. Generally speaking, the contribution of substrate to pollutant removal was insignificant, and it could not guarantee the long-term stable operation of constructed wetland. The concentration of pollutants along the constructed wetland was detected. It was found that COD, NH＋-N and TP were mainly removed in 0-90 cm of down-flow ponds. Both hydraulic loading and substrate setting could influence the pollutant removal efficiency of the constructed wetland. The aim of batch adsorption experiments was to choice the proper substrate, so the results couldn＇t fully reflect pollutant removal ability of the constructed wetland.

关 键 词：潜流人工湿地 基质 去污性能 

分 类 号：X703[环境科学与工程—环境工程]