生态型组合人工湿地污水处理工艺

Process of Ecological Multiple Constructed Wetlands for Wastewater Treatment

建立了由生物调节池、好氧降解与微生物培养池、潜流湿地和表流湿地组成的生态型污水处理组合工艺系统,用以处理生活污水和试验室废水。系统连续运行2年的处理效果持续稳定,出水水质达到国家(GB 18918-2002)1级排放标准。该工艺的建设成本和运行成本低,用地面积小于2 m2/t,建设成本为300~500元/t,运行耗电量小于0.1元/t,管理维护等费用约为0.1元/t,运行合计费用小于0.2元/t,该生态型组合人工湿地所具有的环境效益、经济效益及社会效益,对于处理水量不大、水质变化不太大,管理水平不太高的广大中小城镇、居民小区尤其适用。

An ecological multiple processing model consisting of a bio-regulating pool,an aerobic bio-reactor,a sub-flow wetland cell and a surface-flow wetland cell in series connections was established for treatment of sewage and lab wastewater at university compus.The system was shown to be steady and sustanable within a continuously two years period of operation and monitoring.The water quality after treatment by the system met the first grade of the national standards for discharge of sewage water(GB 18918-2002).The costs of system construction and operation were low,and the area of land used was less than 2 m^2/t.The cost of construction was 300～500 yuan /t,the electricity usage for running the system was less than 0.1yuan /t,the cost of management and maintenance was less than 0.1yuan /t.The established system with its environmental,economical and society benefits could be used in particular as wastewater treatment solutions for towns.