Nitrogen removal in wood chip combined substrate baffled subsurface-flow constructed wetlands: impact of matrix arrangement and intermittent aeration
Nitrogen removal in wood chip combined substrate baffled subsurface-flow constructed wetlands: impact of matrix arrangement and intermittent aeration
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木片组合基质挡板式地下流人工湿地的脱氮：基质排列和间歇通气的影响
DOI：
10.1007/s11356-016-8227-3
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发表时间：
2017-02
影响因子：
5.8
通讯作者：
Jianzheng Li
中科院分区：
文献类型：
--
作者：
Huai Li;Zifang Chi;Baixing Yan;Long Cheng;Jianzheng Li
在本研究中，两个实验室规模的折流式潜流人工湿地（BSFCW）（包括砾石-木片-炉渣和砾石-炉渣-木片）在不同的间歇曝气条件下运行，以评估人工曝气和缓释碳源对高浓度氮废水处理效率的影响。结果表明，砾石-矿渣-木片将好氧/厌氧交替环境扩展到砾石和矿渣区，并在随后的木片部分保持厌氧条件。砾石-矿渣-木片的顺序更有利于污染物的去除。木片框架基质提供充足的碳源，每天曝气 2 小时，同时获得 BFCW 中 COD (97%)、NH4+-N (95%) 和 TN (94%) 的高去除率。结果表明，间歇曝气与木片相结合可以实现 BSFCW 的高氮去除。
In this study, two lab-scale baffled subsurface-flow constructed wetlands (BSFCWs), including gravel-wood chips-slag and gravel-slag-wood chips, were operated at different intermittent aeration to evaluate the effect of artificial aeration and slow-released carbon source on the treatment efficiency of high-strength nitrogen wastewater. Results indicated that gravel-slag-wood chips extended aerobic/anaerobic alternating environment to gravel and slag zones and maintained anaerobic condition in the subsequent wood chip section. The order of gravel-slag-wood chip was more beneficial to pollutant removal. Sufficient carbon source supply resulted from wood-chip-framework substrate simultaneously obtained high removals of COD (97%), NH4+-N (95%), and TN (94%) in BSFCWs at 2 h aeration per day. The results suggest that intermittent aeration combined with wood chips could achieve high nitrogen removal in BSFCWs.
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