厌氧池-两级复合型潜流人工湿地工艺设计

Process Design of Anaerobic Pond-Secondary Subsurface Flow Constructed Wetland System

针对农村生活污水成分简单、浓度较低的特点,提出了厌氧池-两级复合型潜流人工湿地的设计原理和设计方法,通过对厌氧池-人工湿地的组合、两级人工湿地的选用、环形人工湿地的设计以及湿地设计中相关参数的系统研究,从工艺组合和水力学的角度对厌氧池-两级复合型潜流人工湿地系统进行优化设计。系统运行结果表明,厌氧池-两级复合型潜流人工湿地结构设计合理,符合水力学要求,处理效率高,出水优于GB18918—2002《城镇污水处理厂污染物排放标准》一级A类排放标准。

The design principle and method of anaerobic pond-secondary subsurface constructed wetland system were discussed in this paper for treating the rural domestic sewage.The design was optimized from technics assembling and hydraulics parameters based on the analysis of design and parameters of anaerobic pond-secondary subsurface constructed wetland,secondary subsurface constructed wetland,ring-shape constructed wetland and wetland.The results indicated that anaerobic pond-secondary subsurface constructed wetland system had dominating advantage in small area of reasonable design,low cost in building and operation,and high removal efficiency.The effluent can meet class A level one of the national discharge standard of pollutants for municipal wastewater treatment plant.