Effect of C/N on performance of AAO-BAF process - Details

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Abstract：

Combining　anaerobic-anoxic-oxic　reactor　with　an　external　nitrification　biological　aerated　filter,　the　AAO-BAF　process　was　used　to　treat　domestic　wastewater.　Adjusting　the　influent　COD　concentration　from　211　to　675　mgL-1,　the　effect　of　carbon-nitrogen　ratio　(C/N)　on　the　performance　of　the　AAO-BAF　process　was　investigated.　A　low　or　high　influent　organic　concentration　had　significant　effect　on　the　nutrients　removal　efficiency　due　to　the　deficient　phosphorus　release　or　nitrate　competition　in　the　anoxic　zones　of　the　AAO　reactor　between　DPAOs　and　ordinary　heterotrophic　organisms.　When　C/N　was　between　4　and　7,the　average　removal　efficiencies　of　COD,　TN　and　PO43-　could　reach　more　than　86%,　78%　and　90%　respectively.　Large　quantity　of　residual　volatile　fatty　acid　(VFA)would　be　transferred　into　the　anoxic　zones　when　C/N　was　very　high　(such　as　9.5),　which　would　cause　rapid　consumption　of　NO-3　by　ordinary　heterotrophic　organisms　rather　than　denitrifying　phosphorus　accumulating　organisms　(DPAOs).　©　All　rights　reserved.

Keyword：

Biology Volatile fatty acids Wastewater treatment Anoxic water Efficiency Nitrification Denitrification

Author Community：

[ 1 ] [Zhang, Weitang]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Xue, Xiaofei]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Xue, Xiaofei]Beijing Enterprises Water Group (China) Investment Limited, Beijing; 100124, China
[ 4 ] [Pang, Hongtao]Beijing Enterprises Water Group (China) Investment Limited, Beijing; 100124, China
[ 5 ] [Zhang, Jie]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 6 ] [Li, Dong]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 7 ] [Peng, Yongzhen]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China

Reprint Author's Address：

彭永臻
[peng, yongzhen]key laboratory of beijing for water quality science and water environment recovery engineering, beijing university of technology, beijing; 100124, china

Email：

pyz@bjut.edu.cn

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