A^(2)/O+MBR+潜流湿地在南方小流域环境综合整治中的应用

Application of A^(2)/O+MBR+Subsurface Flow Wetland Process in the Comprehensive Environmental Improvement of Southern Small Watershed

受制于该流域用地指标及用地性质的影响,结合流域环境整治的景观需求,采用了灰绿结合的A^(2)/O+MBR+潜流湿地组合工艺形式作为流域治理的水质净化处理工艺对流域收集的污水进行处理。工程运行四年来,出水主要指标稳定达到《地表水环境质量标准》(GB3838-2002)Ⅳ类水质标准(TN≤10 mg/L),其中再生水厂COD、BOD5、NH_(3)-N、TN、TP、SS平均去除率分别达到91.18%、98.27%、97.83%、62.74%、91.29%和99.04%;潜流湿地NH_(3)-N、TN、TP平均去除率分别达到38.44%、12.15%和33.04%。工程实践表明,该组合工艺不仅满足了流域水质要求、节约占地,同时也起到了很好的景观效果。

Subject to the influence of the land use index and land use properties of the basin,combined with the landscape demand of the basin environmental improvement,A^(2)/O+MBR+subsurface flow wetland combined process form of grey-green is adopted as the water purification treatment process for watershed treatment.During the four years of operation,the main effluent indicators have stably reached the"Surface Water Environmental Quality Standard"(GB3838-2002)Class IV water quality standard(TN≤10 mg/L),with average removal rates of COD,BOD5,NH_(3)-N,TN,TP and SS in the reclaimed water plant reaching 91.18%,98.27%,97.83%,62.74%,91.29%and 99.04%,and NH_(3)-N,TN and TP in subsurface flow wetland reached 38.44%,12.15%and 33.04%,respectively.The engineering practice shows that the combined process not only meets the water quality requirements of the river basin and saves the land space,but also plays a very good landscape effect.