三级过滤对复合型微污染地下水净化效能研究  

Study on Purification Efficiency of Three-Level Filtration for Treating The Composite Micro-Polluted Groundwater

作　　者：赵玉华[1] 闫谞[1,2] 程洁[1] 王頔 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]内蒙古城市规划市政设计研究院有限公司,内蒙古呼和浩特010070 [3]辽宁省城乡建设规划设计院,辽宁沈阳110000

出　　处：《沈阳建筑大学学报（自然科学版）》2014年第3期536-541,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07424-002-003)

摘　　要：目的研究接触氧化法的工艺过程与运行参数,以使复合型微污染地下水达到饮用水标准.方法用地下水配加MnSO4·5H2O,FeSO4·7H2O,NH4Cl和腐植酸、尿素、淀粉,模拟复合型微污染地下水,采用锰砂-陶粒-锰砂三级接触氧化过滤法处理,滤层总厚度1.5 m,滤速1 m/h.结果经过三级曝气、过滤后,出水主要指标达到饮用水标准.Fe2+氧化还原电位低,只采用跌水曝气DO值已满足要求,平均去除率为95.36%.CODMn质量浓度相对较低,在只跌水曝气时已达标,平均去除率为44.21%,增大曝气量后出水质量浓度更低,平均去除率为53.69%.采用简单的跌水曝气方式时,出水锰和氨氮质量浓度均较高,经增加曝气强度后,出水氨氮、锰逐渐开始达标,达标后平均去除率分别为97.22%和96.50%.结论三级曝气、过滤接触氧化法处理复合型微污染地下水能取得良好的净化效果,其中DO对锰和氨氮有较大影响.In order to treat the composite micro-polluted groundwater to conform to the standard of drinking water, the process and operating parameters of contact oxidation were studied in this paper. The manganese sand-ceramic-manganese sand consisted of three-level contact oxidation filtration process method was used to treat the composite micro-polluted groundwater that was built through groundwater added MnSO4·5H2O,FeSO4·7H2O,NH4Cl,humic acid,urea and starch. The total thickness of the filter layer was 1.5 m and the filtration velocity was 1.0 m/h. It shows that the main effluent indexes conform to the drinking water standard by three-level aeration and three-level filtration. Because the oxidation-reduction potential is low, Fe^2＋ is easily oxidized ,by simple drop-aeration ,the average removal rate is 95.36% and meets the requirement. Due to the influent CODMn mass concentration is relatively low, the average removal rate achieves 44. 21% by simple drop-aeration. The removal rate can be further improved to 53.69% by increasing the DO content. The mass concentrations of effluent manganese and ammonia nitrogen which treated by simple drop-aeration are higher. After increasing aeration intensity, the effluent mass concentrations can gradually reach the standard of drinking water and average removal rates are 96. 50%, 97.22%, respectively. It concludes that through three-level aeration and three-level filtration contact oxidation process treating, good purification efficiency of the composite micro-polluted groundwater can be obtained. Meanwhile, DO has a great impact on the manganese and ammonia nitrogen removal.

关 键 词：复合型微污染地下水 接触氧化法 三级过滤 曝气 DO 

分 类 号：TU991[建筑科学—市政工程]