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Ammonium removal pathways and microbial community in GAC-sand dual media filter in drinking water treatment

查看全文 作　　者：Shuo [1]Feng;Shuguang [2]Xie;Xiaojian [1]Zhang;Zhiyu [1]Yang;Wei [3]Ding;Xiaobin [1]Liao;Yuanyuan [1]Liu;Chao [1]Chen 高影响力作者 机构地区：[1]School of Environment, Tsinghua University, Beijing 100084, China.;[2]College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China;[3]Dongguan Dongjiang Water Company Limited, Dongguan 523000, China高影响力机构 出　　处：《Journal of Environmental Sciences》索引2012年第24卷第9期,共7页高影响力期刊 基　　金：supported by the Major Science and Technology Program for Water Pollution Control and Treatment(No. 2009ZX07423-003) 摘　　要：A GAC-sand dual media filter(GSF) was devised as an alternative solution for drinking water treatment plant to tackle the raw water polluted by ammonium in place of expensive ozone-GAC processes or bio-pretreatments.The ammonium removal pathways and microbial community in the GSFs were investigated.The concentrations of ammonium,nitrite and nitrate nitrogen were monitored along the filter.Total inorganic nitrogen(TIN) loss occurred during the filtration.For 1 mg ammonium removal,the TIN loss was as high as 0.35 mg,DO consumption was 3.06 mg,and alkalinity consumption was 5.55 mg.It was assumed that both nitrification and denitrification processes occur in the filters to fit the TIN loss and low DO consumption.During the filtration,nitritation,nitrification and nitritation-anaerobic ammonium oxidation processes probably occur,while traditional nitrification and denitrification and simultaneous nitrification and denitrification processes may occur.In the GSFs,Nitrosomonas and Nitrospira are likely to be involved in nitrification processes,while Novosphingobium,Comamonadaceae and Oxalobacteraceae may be involved in denitrification processes. 关 键 词：饮用水处理 微生物群落 过滤器 GAC 双介质 反硝化过程 铵 砂
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