Influence of <i>ρ</i>(C)/<i>ρ</i>(N)Ratio on Technology Characteristics and Denitrifying Bacteria Community for 3BER-S

HAO Rui-xia; REN Xiao-ke; MENG Cheng-cheng; WANG Jian-chao; WANG Run-zhong; ZHAO Wen-li

doi:10.11936/bjutxb2014080002

Journal of Beijing University of Technology > 2015 > 41(5): 755-762. > DOI: 10.11936/bjutxb2014080002

HAO Rui-xia, REN Xiao-ke, MENG Cheng-cheng, WANG Jian-chao, WANG Run-zhong, ZHAO Wen-li. Influence of ρ(C)/ρ(N)Ratio on Technology Characteristics and Denitrifying Bacteria Community for 3BER-S[J]. Journal of Beijing University of Technology, 2015, 41(5): 755-762. DOI: 10.11936/bjutxb2014080002

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Influence of ρ(C)/ρ(N)Ratio on Technology Characteristics and Denitrifying Bacteria Community for 3BER-S

Key Laboratory of Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China

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Received Date: July 31, 2014
Available Online: January 10, 2023

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Abstract

In order to improve the nitrogen removal efficiency of three-dimension-electrode biofilm process,the effects of ρ(C)/ρ(N) on operation characteristics and denitrifying bacteria population community characteristics of a coupled 3-dimensional biofilm-electrode with sulfur autotrophic denitrification technology(3 DBER-S) were investigated at different ρ(C)/ρ(N) conditions.The operating result indicates that there is no significant impact of ρ(C)/ρ(N) on denitrification performance in 3BER-S.And the TN removal efficiency is more than 80%at different ρ(C)/ρ(N) conditions.Moreover,the effects of ρ(C)/ρ(N) on denitrifying bacteria population and denitrification nutrition types in 3BER-S system were found.At high ρ(C)/ρ(N) condition,there is less species of denitrifying bacteria in 3BER-S system,where the Thauera acts as the dominant bacteria and heterotrophic denitrification is the main process.When the ρ(C)/ρ(N) is reduced,both the denitrifying bacteria species and the proportion of sulfur autotrophic denitrification bacteria increase.In a word,the 3BER-S system maintains high and stable nitrogen removal efficiency at different ρ(C)/ρ(N) conditions,because the sulfur makes up for the deficiency of the denitrifying electronic donor in 3 BER-S at low ρ(C)/ρ(N)condition.
- biofilm-electrode,
- elemental sulfur,
- coupled denitrification technology,
- ρ(C)/ρ(N),
- denitrifying bacteria

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Influence of ρ(C)/ρ(N)Ratio on Technology Characteristics and Denitrifying Bacteria Community for 3BER-S

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