水平潜流人工湿地处理北方低浓度生活污水研究

摘要

[Objective] To obtain the optimum operating parameters of the horizontal subsurface flow constructed wetlands. [ Methods ] This research studied the treatment effect of the horizontal subsurface-flow constructed wetlands in different conditions on low-concentration sewage in the North, investigated the relationship between the removal rate of CODCr,NH4+ -N, TN and TP and the temperature, hydraulic loading. [ Result ] When the hydraulic loading was 0.04 -0. 15 m3/(m2 · d) ,high hydraulic loading in summer(0. 12 -0. 15 m3/(m2 ·d)),middle hydraulic loading in autumn(0.07 -0.10 m3(m2 · d)) ,low hydraulic loading in winter(0.04 -0.06 m3/(m2 · d) ) were the optimum operating parameters. [ Conclusion ] The temperature was one of the key factors on treatment effect.%[目的]获得不同条件下水平潜流人工湿地的最佳运行参数.[方法]研究了水平潜流人工湿地在不同工况下处理北方低浓度生活污水的效果,探讨了CODCr、NH4+-N、TN和TP等指标的去除率与温度、水力负荷等的关系.[结果]在0.04～0.15 m3/(m2·d)的水力负荷区间内,夏季高温采用高水力负荷[0.12～0.15 m3/(m2·d)]、秋季中温采用中水力负荷[0.07 ～0.10m3/(m2·d)]、冬季采用低水力负荷[0.04～～0.06 m3/(m2·d)]为最佳运行参数.[结论]温度是影响湿地处理效果的关键因素之一.