Removal of nutrients from septic tank effluent with baffle subsurface-flow constructed wetlands.
Removal of nutrients from septic tank effluent with baffle subsurface-flow constructed wetlands.
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DOI：
10.1016/j.jenvman.2015.01.035
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发表时间：
2015-04
影响因子：
8.7
通讯作者：
L. Cui;Ouyang Ying;Weizhi Yang;Zhujian Huang;Qiaoling Xu;Guangwei Yu
中科院分区：
文献类型：
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作者：
L. Cui;Ouyang Ying;Weizhi Yang;Zhujian Huang;Qiaoling Xu;Guangwei Yu
设计了3种新型折流人工湿地（CWs），分别为折流水平流连续湿地（Z1）、折流垂直流连续湿地（Z2）和折流混合流连续湿地（Z3），以及传统的水平潜流连续湿地（Z4），以测试不同水力停留时间（HRTs）下化粪池出水氮(N)和磷(P)的去除效果。结果表明，4种化粪池出水氮磷去除率最佳HRT为2 d。在此HRT下，Z1、Z2、Z3和Z4 CWs对TN的去除率分别为49.93%、58.50%、46.01和44.44%，对TP的去除率分别为87.82%、93.23、95.97和91.30%。我们的研究进一步表明，由于Z3连续化粪池出水的混合流动方向和连续化粪池系统内更好的氧气供应，Z3连续化粪池出水中N和P的整体去除设计是最好的。
Three new baffle flow constructed wetlands (CWs), namely the baffle horizontal flow CW (Z1), baffle vertical flow CW (Z2) and baffle hybrid flow CW (Z3), along with one traditional horizontal subsurface flow CW (Z4) were designed to test the removal efficiency of nitrogen (N) and phosphorus (P) from the septic tank effluent under varying hydraulic retention times (HRTs). Results showed that the optimal HRT was two days for maximal removal of N and P from the septic tank effluent among the four CWs. At this HRT, the Z1, Z2, Z3 and Z4 CWs removed, respectively, 49.93, 58.50, 46.01 and 44.44% of TN as well as 87.82, 93.23, 95.97 and 91.30% of TP. Our study further revealed that the Z3 CW was the best design for overall removal of N and P from the septic tank effluent due to its hybrid flow directions with better oxygen supply inside the CW system.