OALib Journal期刊
生物法-人工湿地组合工艺处理小城镇混合污水研究
Keywords: 生物法 ,组合式人工湿地 ,混合污水 ,去除速率常数
Abstract:
为适应小城镇污水处理高效、低耗、管理简单的要求，开展了生物法(水解酸化/生物接触氧化)-人工湿地组合工艺(A/BCO-CW)处理小城镇片区混合污水的研究。结果表明，A/BCO系统在停留时间为3～6h条件下，对悬浮物和有机物有高的去除效率，COD、BOD5和TSS去除率分别达到63.1%、67.7%和66.2%，避免了人工湿地堵塞和提高处理效率，减少了所需湿地面积44%。全年运行结果表明，在0.30～0.59m/d水力负荷率下，垂直流-表面流-水平潜流人工湿地组合系统对COD、BOD5和TSS平均去除负荷达9.4、5.1和7.2g/(m2·d)(42%、71.2%和85.2%)；COD、BOD5去除速率常数为74.6±12.1m/y、166±30.5m/y，这些数值均处于文献中k值范围的高量程内。A/BCO-人工湿地系统对COD、BOD5和TSS具有好的处理效果，出水水质能够稳定达到《地表水环境质量标准》(GB3838-2002)的IV类水标准，2种处理方法有效组合起来，所开发的低成本、高效率、可持续运行的城镇废水处理组合系统，将会在实际应用尤其是高有机负荷污水处理中发挥良好效用。
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