Start-up characteristics of four-zone integrated reactor for nitrogen removal in winter and analysis of nitrobacteria community - 文章详情页

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The　treatment　of　decentralized　sewage　has　gained　more　and　more　attention　in　China　in　recent　years.　A　four-zone　integrated　reactor　was　designed　by　combining　biofilm　system　and　activated　sludge　system　and　start-up　by　gradient　shorten　the　HRT.　The　removal　of　COD,　NH4+-N　and　TN　were　studied　at　8-15℃.　Fluorescence　in　situ　hybridization　(FISH)　was　used　to　detect　nitrobacteria　population　(AOB,　NOB)　so　as　to　study　the　relationship　between　the　reactor　effect　and　functional　micro-bacteria.　The　results　showed　that,　when　the　HRT　was　9.2　h,　the　removal　efficiencies　of　COD,　ammonia　and　TN　were　92.11%,　99.21%　and　61.63%,　respectively.　Compared　to　the　initial　stage,　the　numbers　of　AOB　and　NOB　in　the　late　phase　were　increased　by　5.82　and　6.14　times,　respectively.　In　addition,　the　proportion　of　nitrobacteria　was　increased　from　6.12%　to　16.38%,　which　became　the　dominant　bacteria　in　biofilms.　Moreover,　the　nitrification　efficiency　was　increased　from　78.49%　to　97.52%,　while　the　number　of　NOB　was　5.61-fold　increased　and　the　value　of　AOB/NOB　was　optimized　to　1.47.　The　effluent　quality　is　guaranteed　by　the　enrichment　of　AOB　and　NOB　and　suitable　value　of　AOB/NOB.　©,　2015,　Science　Press.　All　right　reserved.

关键词：

Fluorescence in situ hybridization (FISH); Integrated reactor; Nitrobacteria; Nitrogen removal; Start-up at winter

作者机构：

[ 1 ] [Zhang, Y.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Department of Architectural Engineering, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [Sun, F.-X.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Department of Architectural Engineering, Beijing University of Technology, Beijing, 100124, China
[ 3 ] [Xie, H.-J.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Department of Architectural Engineering, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Chen, J.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Department of Architectural Engineering, Beijing University of Technology, Beijing, 100124, China
[ 5 ] [Sui, X.]Beijing North Drainage Works Design and Research Institute Company Limited, Beijing, 100123, China
[ 6 ] [Gan, Z.-M.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Department of Architectural Engineering, Beijing University of Technology, Beijing, 100124, China
[ 7 ] [Wang, X.-P.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Department of Architectural Engineering, Beijing University of Technology, Beijing, 100124, China
[ 8 ] [Shi, Y.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Department of Architectural Engineering, Beijing University of Technology, Beijing, 100124, China

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