Denitrifying phosphorus removal by nitrite pathway in a post-anoxic SBR system. - Details

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Abstract：

In　a　post-anoxic　sequencing　batch　reactor(SBR)　system　treating　domestic　wastewater,　the　realization　of　nitritation　and　denitrifying　phosphorus　removal　by　nitrite　pathway　and　its　removal　efficiency　was　investigated.　The　results　indicated　that　nitritation　and　denitrifying　phosphorus　removal　in　low　concentration　of　ammonia　water　at　room　temperature　was　established　by　the　strategy　of　sludge　discharge　in　condition　of　limited　oxygen.　The　effluent　of　COD,　TP,　NH4+-N,　TN　was　17.47mg/L,　0.462mg/L,　0mg/L　and　8.35mg/L,　respectively.　According　to　batch　experiments,　the　ratio　of　denitrifying　phosphorus　accumulating　organisms　which　took　nitrite　as　electron　acceptor　in　total　poly-phosphate　accumulating　organisms　could　reached　70%.　Studies　had　found　that　140mins　anoxic　reaction　time　could　have　negative　effects　on　phosphorus　removal,　and　anoxic　reaction　time　should　be　controlled　in　the　completion　of　the　nitrite　consumption.　Aeration　mode　affected　the　removal　of　nitrogen.　With　total　oxygen　changeless,　adopted　the　strategy　of　high　to　low　strength　aeration(1.2~0.2L/min),　nitrogen　removal　efficiency　could　be　improved.　©　2017,　Editorial　Board　of　China　Environmental　Science.　All　right　reserved.

Keyword：

Ammonia Efficiency Denitrification Phosphorus Ammonium hydroxide Effluents Wastewater treatment Nitrogen removal Oxygen Batch reactors

Author Community：

[ 1 ] [Li, Dong]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Li, Xiao-Ying]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Yang, Jie]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Luo, Ya-Hong]Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, College of the Environment, Henan Normal University, Xinxiang; 453007, China
[ 5 ] [Zhou, Yuan-Zheng]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 6 ] [Zeng, Hui-Ping]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 7 ] [Zhang, Jie]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 8 ] [Zhang, Jie]State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin; 150090, China

Reprint Author's Address：

李冬
[li, dong]key laboratory of beijing for water quality science and water environment recovery engineering, beijing university of technology, beijing; 100124, china

Email：

lidong2006@bjut.edu.cn

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