进水浓度和水力停留时间对浮水植物净化效果的影响  

Influence of Influent Concentration and Hydraulic Retention Time on Purification Effect of Three Floating Plants

作　　者：王小娟[1] 陈年来[1] 褚润[1] 

机构地区：[1]甘肃农业大学资源与环境学院,甘肃兰州730070

出　　处：《环境监测管理与技术》2016年第5期29-33,共5页The Administration and Technique of Environmental Monitoring

基　　金：甘肃农业大学盛彤笙基金资助项目(GSAU-STS-1435)

摘　　要：以浮萍、大薸、凤眼莲3种浮水植物为试材,分别在水力停留2 d、4 d、8 d、10 d、12 d和14 d测定污水中DO、COD、TP、NH_3-N含量。通过比较植物在不同浓度污水中的净化效果,确定其在最佳浓度污水中对各污染物处理的最佳停留时间。结果表明,3种植物在适宜污水浓度均表现出较强净化效果。净化周期内,NH_3-N、TP去除率变化趋势与DO变化趋势一致,大薸、浮萍、凤眼莲在低浓度污水中对NH_3-N、TP去除率最好,NH3-N最佳停留时间分别为8 d、12 d、14 d,TP去除的最佳停留时间均为10 d,中浓度污水适合COD去除,大薸、浮萍、凤眼莲对COD去除的最佳停留时间分别为14 d、8 d、10 d。Taking three floating plants Pistia stratiotes L. , Lemna minor L. and Eichhornia crassipes （Mart. ） Solme as test materials, the concentration of DO, COD , TP, NH3 - N in sewage were determined by setting hydraulic residence time as 2 d, 4 d, 8 d, 10 d, 12 d and 14 d, respectively. Comparing the plant purification effect in different concentration sewage, the optimal hydraulic retention time （HRT） of plants in the optimal sewage concentration was determined, Results showed that these three floating plants had strong purifying effect on appropriate concentration sewage. During the purification cycle, Pistia stratiotes L. , Lemna minor L. and Eichhornia crassipes （ Mart. ） Solme had the best removal rate of NH3 - N and TP in low concentration. The optimal HRT of NH3 - N removal were 8 d, 12 d and 14 d, respectively. The best HRT of TP removal were all 10 d. Medium concentration sewage was appropriate for COD removal. The optimal residence time of Pistia stratiotes L., Lemna minor L. , and Eichhournia crassipes （Mart. ） Slome on COD removal were 14 d, 8 d and 10 d respectively.

关 键 词：浮水植物 污水浓度 水力停留时间 净化效果 

分 类 号：X703.1[环境科学与工程—环境工程]