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Evaluation of nutrient removal efficiency and microbial enzyme activity in a baffled subsurface-flow constructed wetland system

文献类型： 外文期刊

作者： Cui, Lihua 1 ; Ouyang, Ying 2 ; Gu, Wenjie 3 ; Yang, Weizhi 1 ; Xu, Qiaoling 1 ;

作者机构： 1.South China Agr Univ, Coll Nat Resource & Environm, Guangzhou 510642, Peoples R China

2.USDA Forest Serv, Ctr Bottomland Hardwoods Res, Mississippi State, MS 39762 USA

3.Guangdong Acad Agr Sci, Inst Soil & Fertilizer, Guangzhou 510640, Peoples R China

关键词： Baffled subsurface-flow;Constructed wetland;Enzyme activity;Nitrogen and phosphorus removal

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： In this study, the enzyme activities and their relationships to domestic wastewater purification are investigated in four different types of subsurface-flow constructed wetlands (CWs), namely the traditional horizontal subsurface-flow, horizontal baffled subsurface-flow, vertical baffled subsurface-flow, and composite baffled subsurface-flow CWs. Results showed that the urease activity in the composite baffled subsurface-flow CW was significantly higher than in the other three CWs, while the phosphatase activity in the vertical baffled subsurface-flow CW were higher than in the other three CWs. There were significant and very significant correlations between the activities of urease and the removal rates of TN and NH4+-N for the horizontal baffled flow, horizontal subsurface flow, and composite baffled subsurface flow CWs. This study suggests that the activity of urease in the root zones of those three CWs is an important indicator for N purification from wastewaters.

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