垂直流湿地处理低浓度生活污水的水力负荷  

Hydraulic loading of vertical-flow wetland applied in low concentration sewage treatment.

作　　者：龚琴红[1] 田光明[1] 吴坚阳[1] 丁晔[1] 李文红[1] 

机构地区：[1]浙江大学环境工程系,浙江杭州310029

出　　处：《中国环境科学》2004年第3期275-279,共5页China Environmental Science

基　　金：国家"863"项目(2002AA60101201);浙江省重大项目(021103723)

摘　　要：在5种水力负荷条件下,采用连续进水、间歇排水的运行方式,对2种垂直流湿地处理低浓度生活污水的去除效果进行了研究.结果表明,在水力负荷为0.085,0.106,0.141,0.212m3/(m2d)的条件下,多层填料(1#)湿地和双层填料(2#)湿地对CODCr和NH4+-N的去除无明显差异,出水CODCr和NH4+-N浓度均低于30mg/L和5mg/L.两垂直流湿地CODCr净化负荷与有机污染负荷之间呈显著的正相关关系(n=4R2>0.98).垂直流湿地中氮的去除主要是依靠微生物的硝化和反硝化作用;进水水质、水力负荷和温度等影响湿地系统硝化和反硝化作用的进行,水力负荷为0.141m3/(m2d)时,总氮(TN)去除效率与有机污染负荷呈正相关.Under conditions of 5 kinds of hydraulic loading, adopting operating type of continuous water input and intermittent drainage, the organics and nitrogen removal effect of vertical flow wetland composed of two different fillers in low concentration living sewage treatment was studied. Under conditions of hydraulic loadings 0.085m3/(m2d), 0.106m3/(m2d), 0.141m3/(m2d) and 0.212m3/(m2d) the CODCr and NH4+-N removal had no significant difference between multilayer filler (1#) wetland and dual-filler (2#) wetland, with the effluent CODCr and NH4+-N concentrations all below 30mg/L and 5mg/L respectively. An obvious positive correlation was found between CODCr purifying loading and organic polluting loading (n=41, R2>0.98). Nitrogen removal in vertical-flow wetland depended mainly on the nitrification and denitrification of microbe, which were affected by water input quality, hydraulic loading and temperature. There was positive correlation between TN removal efficiency and organic polluting loading at the hydraulic loading of 0.141m3/(m2d).

关 键 词：垂直流湿地 水力负荷 生活污水 硝化 反硝化 

分 类 号：X144[环境科学与工程—环境科学]