土壤-纳滤系统处理再生水补充地下水的研究  

Study on groundwater recharge with reclaimed water treated by soil-nanofiltration system

作　　者：吴琳琳[1] 张猛[1] 成徐州[1] 赵璇[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084

出　　处：《环境工程学报》2011年第2期267-270,共4页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(50908130;50878115);中国博士后基金(20100470348);中德合作项目(2007DFB90460)

摘　　要：为充分保障再生水回灌地下时的水质安全、提供高质量地下水资源,在土壤处理系统中嵌入纳滤技术强化对再生水的处理效果,并初步探讨土壤系统作为前处理对纳滤膜污染的控制机理。结果表明,未采用臭氧氧化预处理前,土壤处理对再生水DOC和UV254的平均去除率分别为22%和20%。臭氧氧化对UV254的平均去除率为51%,并将土壤对DOC的去除率提高到52%。纳滤膜对DOC的去除率在72%-83%之间,对UV254去除率在75%-84%之间,使出水DOC稳定在1 mg/L以下。纳滤膜对电导率的去除率为40%-50%,可以降低溶解性固体对地下水盐度和土壤性能的影响。三维荧光光谱表明引起膜污染的主要是类蛋白物质。再生水中引起膜污染物质的特征峰强度经短期土壤处理后大幅降低,表明短期土壤处理能够有效去除再生水中引起膜污染的物质,控制纳滤膜污染。The combined system of soil treatment and nanofiltration was used to treat reclaimed wastewater in order to guarantee the water safety for groundwater recharge.In this study,the removal efficiencies of organic and inorganic matters by the combined system and membrane fouling control mechanism by the soil treatment were discussed.The results demonstrated that 22% of DOC and 20% of UV254 could be removed by the soil treatment.Ozonation could remove 51% of UV254 value,and enhanced DOC removal efficiency of the soil treatment to 52%.The removal efficiencies of DOC and UV254 by NF270 were 72%-83% and 75%-84%,respectively.DOC of NF270 permeate was below 1.0 mg/L.NF270 shows 40%-50% removal efficiency of conductivity,which could reduce the negative effects of dissolved solids on soil and groundwater.3DEEM spectrum showed that protein-like substance was the main membrane foulant,which could be effectively removed by the soil treatment from reclaimed wastewater.

关 键 词：再生水 土壤处理 纳滤 地下水回灌 

分 类 号：X703[环境科学与工程—环境工程]