State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China.
State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China.
Bioresour Technol. 2019 May;280:199-212. doi: 10.1016/j.biortech.2019.02.020. Epub 2019 Feb 4.
Orthogonal tests were performed to assess the effect of design parameters on hydraulic and treatment performances of constructed wetlands. The results showed that water depth, layout of in- and outlet, flow rate, and aspect ratio mainly affected hydraulic performance, and water depth, plant spacing, and layout of in- and outlet mainly affected treatment performance. Optimal integrated performance was achieved with combination of 20-30 cm water depth, five evenly distributed inlets and one middle outlet, a flow rate of 0.4-0.55 m/h, 20-cm plant spacing, a 1.125:1 aspect ratio, and planted with Scripus tabernaemontani. The average treatment performances of 27.2%, 16.3%, and 30.7% removal rates were received for total nitrogen, total phosphorus, and total suspended solid, respectively. The design parameters that significantly influenced hydraulic performance did not significantly influence treatment performance. Various hydraulic and purification indicators displayed extremely significant correlations. There was a significant correlation between hydraulic performance and mass removal capacity.
采用正交试验研究了设计参数对人工湿地水力和处理性能的影响。结果表明，水深、进出水口布置、流量和长宽比对水力性能影响较大，而水深、植物间距和进出水口布置对处理性能影响较大。当水深为 20-30cm、进水口均匀分布 5 个且只有 1 个出水口、流量为 0.4-0.55m/h、植物间距为 20cm、长宽比为 1.125:1，且种植香蒲时，人工湿地综合性能最佳。总氮、总磷和总悬浮物的平均去除率分别为 27.2%、16.3%和 30.7%。对水力性能有显著影响的设计参数对处理性能没有显著影响。各种水力和净化指标之间存在极强的相关性。水力性能与质量去除能力之间存在显著相关性。
