Effect of C/N ratio on nitrous oxide production during denitrification with different electron acceptors - 文章详情页

作者：

Shang, H.-L. (Shang, H.-L..) | Peng, Y.-Z. (Peng, Y.-Z..) (学者：彭永臻) | Zhang, J.-R. (Zhang, J.-R..) | Wang, S.-Y. (Wang, S.-Y..) (学者：王淑莹)

收录：

Scopus PKU CSCD

摘要：

The　experiment　investigated　the　nitrous　oxide　production　under　different　C/N　ratios　during　denitrification,　taking　nitrate　and　nitrite　as　electron　acceptor　respectively.　Ethanol　was　selected　as　carbon　source.　The　C/N　ratios　were　0,　1.2,　2.4,　3.5,　5.0　and　20　when　nitrate　was　taken　as　electron　acceptor　and　C/N　ratios　0,　1.8,　2.4,　3.0,　4.3,　5.2,　6.6,　20.6　when　electron　acceptor　was　nitrite.　The　results　indicated　that:　the　optimum　C/N　ratio　was　3.0　taking　nitrite　as　electron　acceptor　and　the　N2O　production　was　0.044　mg·L-1;　the　optimum　C/N　ratio　was　5.0　taking　nitrate　as　electron　acceptor　and　the　N2O　production　was　0.135　mg·L-1　which　was　3　times　higher　than　that　of　nitrite　as　electron　acceptor.　Though　the　electron　acceptor　changed,　the　trend　of　N2O　production　was　similar:　when　carbon　source　was　badly　insufficient,　the　production　of　N2O　and　denitrification　rate　were　both　quite　small;　the　N2O　production　increased　with　the　increasing　of　the　quantity　of　carbon　source;　when　the　carbon　source　was　excessive,　the　N2O　production　sharply　raised.　Consequendy,　compared　to　complete　nitrification　and　denitrification,　short-cut　nitrification　and　denitrification　could　save　40%　carbon　source.　Moreover,　controlling　C/N　=　3　could　reduce　the　production　of　N2O　in　short-cut　nitrification.

关键词：

C/N ratio; Denitrification; Nitrate; Nitrite; Nitrous oxide

作者机构：

[ 1 ] [Shang, H.-L.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Peng, Y.-Z.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Zhang, J.-R.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Wang, S.-Y.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China

通讯作者信息：

彭永臻
[Peng, Y.-Z.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China

电子邮件地址：

pyz@bjut.edu.cn

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