分级进水对阶梯垂直流人工湿地污水处理效果的影响

发布时间：2018-02-13 22:55

本文关键词： 阶梯垂直流人工湿地分级进水脱氮除磷　出处：《湖泊科学》2017年05期 　论文类型：期刊论文

【摘要】：本文研究了分级进水对阶梯垂直流人工湿地处理生活污水效果的影响.在保持总水力负荷为100 mm/d的情况下,分别将总进水量的0%、10%、20%和30%用于湿地第2级阶梯的进水,分析了系统对化学需氧量(COD)和氮、磷的总去除率和沿程变化.结果表明,不同分级进水比例条件下人工湿地对COD和总磷(TP)的去除率差异不明显,COD和TP的最高去除率分别为87.80%和81.17%,COD的去除主要集中在第1级,其贡献率平均为82.18%,TP的去除主要集中在第3级,贡献率平均为54.37%.分级进水对总氮(TN)去除率影响显著(P0.05),当2级进水比例为20%时,TN去除率最高,为61.70%±4.48%,且3个梯级对TN的去除贡献率分别为36.52%、42.11%和21.37%.相同组合形式的垂直流人工湿地处理生活污水的工程应用中,可根据需求设置20%左右的2级进水比例,以提高人工湿地对污染物的去除效果.
[Abstract]:In this paper, the effect of staged influent on the treatment of domestic sewage by step vertical flow constructed wetland was studied. Under the condition that the total hydraulic load was kept at 100 mm/d, 20% and 30% of the total influent volume were applied to the influent of the second step step of the wetland, respectively. The total removal rate of COD, nitrogen and phosphorus in the system and its variation along the process were analyzed. The highest removal rates of COD and TP in constructed wetland were 87.80% and 81.17 respectively, and the average contribution rate was 82.18%. The average contribution rate was 54.37. The removal rate of TNN was significantly affected by the graded influent, and the removal rate of TN was the highest when the ratio of two-stage influent was 20. 61.70% 卤4.48, and the contribution rate of the three steps to TN removal is 36.52% and 21.37% respectively. In the engineering application of treating domestic sewage with the same combination of vertical flow constructed wetlands, the ratio of about 20% grade influent can be set according to the demand. In order to improve the removal of pollutants in constructed wetlands.
【作者单位】：同济大学长江水环境教育部重点实验室;
【基金】：国家自然科学基金项目(51578395) 上海市创新行动计划项目(16DZ1204803)联合资助
【分类号】：X703

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