Nitrite effect on biological phosphorus removal process - Details

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EI Scopus PKU CSCD

Abstract：

In　this　study,　phosphorus　accumulating　organisms　(PAOs)　were　cultivated　in　two　SBR　systems,　one　operated　as　anaerobic/aerobic　mode,　the　other　as　anaerobic/anoxic　mode.　The　effects　of　nitrite　on　the　two　modes　of　phosphorus　removal　system　were　investigated.　The　results　showed　that　presence　of　nitrite　inhibits　both　aerobic　and　anoxic　phosphorus　uptake,　but　aerobic　phosphorus　uptake　was　more　affected　than　anoxic　phosphorus　uptake.　In　this　research,　0.88　mg/gVSS　and　6.72　mg/gVSS　were　observed　as　threshold　for　aerobic　and　anoxic　phosphate　uptake,　respectively.　With　the　aid　of　a　stepwise　elevation　of　NO2--N　added　in　influent,　denitrifying　phosphorus　accumulating　organisms　were　gradually　accommodated　to　resist　and　utilize　NO2--N　as　electron　acceptor,　but　the　phosphorus　removal　efficiency　was　lower　than　O2　and　NO3--N　as　electron　acceptors.

Keyword：

Nitrogen oxides Anoxic water Biology Biological water treatment Phosphorus

Author Community：

[ 1 ] [Bao, Lin-Lin]School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
[ 2 ] [Bao, Lin-Lin]School of Chemistry and Environmental Sciences, Henan Normal University, Xinxiang 453007, China
[ 3 ] [Li, Xiang-Kun]School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
[ 4 ] [Li, Dong]School of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100022, China
[ 5 ] [Kong, Xiang-Ji]School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
[ 6 ] [Zhao, Yan]School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
[ 7 ] [Zhang, Jie]School of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100022, China