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- W3145900923 abstract "为了削减南淝河输入巢湖的污染物,建成南淝河旁路多级人工湿地水质净化示范工程,包括预处理系统、垂直潜流湿地系统和水平潜流湿地系统3个工艺单元. 2014年3月至2015年2月对人工湿地各净化单元出水进行周年监测,分析各净化单元对污染物的去除效果,并探讨季节变化对去除效果的影响. 结果显示,旁路多级人工湿地体现较高的去除效果. 对高锰酸盐指数(COD<sub>Mn</sub>)、总氮(TN)、铵态氮(NH<sub>4</sub><sup>+</sup>-N)和总磷(TP)的总去除率分别为70.9%、43.7%、43.5%和76.6%. COD<sub>Mn</sub>和TP的平均出水浓度均优于《地表水环境质量标准》(GB 38382002)中的Ⅳ类水标准,而NH<sub>4</sub><sup>+</sup>-N的平均出水浓度优于《城镇污水处理厂污染物排放标准》(GB 189182002)一级A类标准. 各净化单元对污染物的去除差异显著,COD<sub>Mn</sub>的去除主要发生在预处理单元,其对COD<sub>Mn</sub>削减的净化率为65.1%;TN、NH<sub>4</sub><sup>+</sup>-N和TP的去除主要发生在垂直潜流湿地单元,其对TN、NH<sub>4</sub><sup>+</sup>-N和TP削减的净化率分别为23.2%、27.1%和51.1%. 不同季节,旁路多级人工湿地对污染物去除具有一定差异,对COD<sub>Mn</sub>和TP的去除率均表现为夏季> 秋季> 春季> 冬季,对TN的去除率表现为秋季> 春季> 夏季> 冬季,对NH<sub>4</sub><sup>+</sup>-N的去除率表现为秋季> 夏季> 春季> 冬季. 最后,建议通过增加碳源和增大水力停留时间来进一步优化该工艺,以有效提高脱氮效果.;The water purification demonstration project of a multi-stage bypass constructed wetland beside Nanfei River, including a pretreatment unit, vertical flow constructed wetland unit and horizontal flow constructed wetland unit, was built to reduce pollutants from Nanfei River into Lake Chaohu. From March 2014 to February 2015, the concentrations of the pollutants were detected from each purification unit and removal efficiencies of each constructed wetland unit were examined. The results showed that a multi-stage bypass constructed wetland reflected a higher removal efficiency. The total removal rates of COD<sub>Mn</sub>, total nitrogen(TN), ammonium nitrogen(NH<sup>+</sup><sub>4</sub>-N) and total phosphorus(TP) reached 70.9%, 43.7%, 43.5% and 76.6%, respectively. COD<sub>Mn</sub> and TP of the effluent attained the Environmental Quality Standard for Surface Water (GB 38382002) Ⅳ, while NH<sub>4</sub><sup>+</sup>-N of the effluent meet the needs of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant Pollutant (GB 189182002) class 1 A. There were significant differences on the pollutant removal efficiency among different purification units, the pretreatment unit played a leading role in removing COD<sub>Mn</sub>, with a 65.1% reduction for COD<sub>Mn</sub>; while TN, NH<sub>4</sub><sup>+</sup>-N and TP were degraded mainly in the vertical flow constructed wetland unit, which contributed 23.2%, 27.1% and 51.1% respectively to the total removal of TN, NH<sub>4</sub><sup>+</sup>-N and TP. The removal efficiencies of the studied pollutants varied with the seasons. The removal rate of COD<sub>Mn</sub> and TP decreased in sequence of summer> autumn> spring> winter, while the removal rate of TN decreased in sequence of autumn> spring> summer> winter and the removal rate of NH<sub>4</sub><sup>+</sup>-N was in the order of autumn> summer> spring> winter. Finally, in order to improve the denitrification efficiency recommended by adding carbon source and increasing the hydraulic retention time to further optimize the process." @default.
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- W3145900923 date "2016-01-01" @default.
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- W3145900923 title "Purification efficiencies of a multi-stage bypass constructed wetland for treating polluted water from Nanfei River, Chaohu Catchment" @default.
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- W3145900923 doi "https://doi.org/10.18307/2016.0209" @default.
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