组合人工湿地系统治理受污染的长沙市星月水库水

Combined Constructed Wetland System for Control of Polluted Xingyue Reservoir Water

采用表流+潜流三级串联组合工艺净化进入长沙市青竹湖星月水库的生活污水、农田污水和地表径流水,处理规模为6 000 m^3/d,污混浊暴雨径流过滤处理容量为5 000 m^3/h,溢洪能力为20×10~4m^3/d。该系统处理后出水各项指标可达到《城镇污水处理厂污染物排放标准》(GB18918—2002)一级A标准,对COD、TN、TP、SS去除率依次为79.67%、58.48%、49.72%、83.54%。结果表明,组合湿地系统达到了净化水库水质、修复景观、增加水库蓄水量和暴雨期溢洪等要求。

A combined system of surface flow and subsurface flow units in series was used to purify domestic sewage, agricultural runoff and surface runoff. The treatment capacity of the system was 6 000 m^3/d, the filtration capacity of muddy storm runoff was 5 000 m^3/h, and the flood discharge capacity was 20 × 10^4 m^3/d. After treatment by the system, the effluent quality could meet the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB 18918 - 2002）. The average removal rates of COD, TN, TP and SS were 79.67%, 58.48%, 49.72% and 83.54%, respectively. The results indicated that the combined constructed wetland system could meet the requirements for purification of polluted reservoir water, landscape restoration, and increase in water stor- age and flood discharge capacities of the reservoir.