多级土壤渗滤系统处理滇池入湖河水的研究  

Multi-soil-layer System for Treatment of Polluted River Water Flowing into Dianchi Lake

作　　者：魏才倢[1] 吴为中[1] 陶淑[1,2] 李德生[2] 

机构地区：[1]北京大学环境科学与工程学院,北京100871 [2]兰州交通大学环境与市政工程学院,甘肃兰州730070

出　　处：《中国给水排水》2010年第9期104-107,111,共5页China Water & Wastewater

基　　金：国家高技术研究发展计划(863)项目(2005AA601010-03);国家水体污染控制与治理科技重大专项(2009ZX07102-003)

摘　　要：采用多级土壤渗滤(MSL)模拟系统处理滇池入湖河水,以陶结、木炭、石灰石和铁屑作为混合模块层滤料,以沸石作为渗滤层滤料,考察了曝气和水力负荷等参数对系统除污效能的影响。结果表明,MSL系统对受污染河水具有良好的净化效果,尤其是在非曝气条件下,对COD、NH4+-N、TN和TP的平均去除率分别在50%、90%、80%和70%以上,且出水NH4+-N和TP浓度可达到《地表水环境质量标准》(GB3838—2002)的Ⅲ类标准。曝气与否对NH4+-N和TP去除效果的影响较小,但曝气可明显提高系统对有机物的去除效果,而同时却大大降低了对TN的去除效能。另外,提高水力负荷会降低对有机物的去除效果,而对氮和磷去除效果的影响则相对较小。Multi-soil-layer （MSL） simulation system was used for purifying polluted river water flowing into Dianchi Lake. The MSL system is filled with ceramsite, charcoal, limestone and iron filings in the mixed !ayer and zeolite in the permeable layer. The effect of aerated conditions and hydraulic load on the removal of pollutants by MSL system was investigated. The results indicate that the MSL system has excellent purification effect of polluted river water. Under the non-aerated condition, the average re- moval rates of COD, ammonia nitrogen, TN and TP are above 50% , 90% , 80% and 70% respectively, and the effluent ammonia nitrogen and TP concentrations can reach the III criteria specified in the Envi- ronmental Quality Standards for SuoCace influence on the removal efficiencies of Water （GB 3838 -2002）. Aeration and no aeration have slight ammonia nitrogen and TP. However, aeration can significantly improve the removal efficiency of organic matter and reduce greatly the removal efficiency of TN. In addi- tion, increasing the hydraulic loading rate can reduce the removal efficiency of organic matter and has rel- atively slight influence on the removal efficiency of nitrogen and phosphorus.

关 键 词：多级土壤渗滤系统 受污染河水 曝气 混合模块层 渗滤层 

分 类 号：X703[环境科学与工程—环境工程]