Nitrogen removal and recovery from lagoon-pretreated swine wastewater by constructed wetlands under sustainable plant harvesting management
Nitrogen removal and recovery from lagoon-pretreated swine wastewater by constructed wetlands under sustainable plant harvesting management
复制标题
在可持续植物收获管理下，人工湿地对泻湖预处理的养猪废水进行氮去除和回收
DOI：
10.1016/j.biortech.2018.03.017
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发表时间：
2018
影响因子：
11.4
通讯作者：
Wu Jinshui
中科院分区：
文献类型：
--
作者：
Luo Pei;Liu Feng;Zhang Shunan;Li Hongfang;Yao Ran;Jiang Qianwen;Xiao Runlin;Wu Jinshui
以3种浓度的猪场废水为供试材料，采用3级中试规模的狐尾藻表面流人工湿地系统，研究了在可持续植物收获管理下，人工湿地系统对氮的去除与恢复。对NH_4 ~+-N的平均去除率为87.7-97.9%，对总氮的平均去除率为85.4-96.1%。通过多次收获M.当TN浓度为21.8-282 mg L-1时，水生植物的最大值为120-222 g N m-2 yr-1。在不同的CW单元中，收获的TN质量占总去除量的0.85-100%。基于质量平衡估算，植物吸收、沉积物储存和微生物去除分别占TN负荷质量的13.0- 55.0%、4.9- 8.0%和33.0-67.5%。本研究结果证实了M. aquaticum适合于在CW系统中去除和回收营养物质，该系统设计用于处理养猪废水，并结合可持续的植物收获策略。
A series of three-stage pilot-scale surface flow constructed wetlands (CWs) planted withMyriophyllum aquaticumwere fed with three strengths of lagoon-pretreated swine wastewater to study nitrogen (N) removal and recovery under sustainable plant harvesting management. The CWs had mean removal efficiency of 87.7–97.9% for NH4+-N and 85.4–96.1% for total N (TN). The recovered TN mass via multiple harvests ofM. aquaticumwas greatest (120–222 g N m−2yr−1) when TN concentrations were 21.8–282 mg L−1. The harvested TN mass accounted for 0.85–100% of the total removal in the different CW units. Based on mass balance estimation, plant uptake, sediment storage, and microbial removal accounted for 13.0–55.0%, 4.9–8.0%, and 33.0–67.5% of TN loading mass, respectively. The results of this study confirm thatM. aquaticumis appropriate for the removal and recovery of nutrients in CW systems designed for treating swine wastewater in conjunction with sustainable plant harvesting strategies.