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文章摘要

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

DOI：

英文关键词: Floating plants Sewage concentration Hydraulic retention time Purification effect

基金项目:甘肃农业大学盛彤笙基金资助项目(GSAU-STS-1435)

作者	单位
王小娟	甘肃农业大学资源与环境学院
陈年来	甘肃农业大学资源与环境学院
褚润	甘肃农业大学资源与环境学院

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中文摘要:

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，NH3-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。

英文摘要:

Taking three floating plants Pistia stratiotes L., Lemna minor L. and Eichhornia crassipes (Mart.) Solme as test materials, the concentration of DO, COD, TP, NH3-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 NH3-N and TP in low concentration. The optimal HRT of NH3-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.

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