Short-cut nitrification and denitrification in A2O process treating domestic wastewater - 文章详情页

作者：

Zeng, W. (Zeng, W..) (学者：曾薇) | Li, L. (Li, L..) | Yang, Y.-Y. (Yang, Y.-Y..) | Zhang, Y. (Zhang, Y..) (学者：张勇) | Wang, S.-Y. (Wang, S.-Y..) (学者：王淑莹)

收录：

Scopus PKU CSCD

摘要：

At　normal　temperature,　a　lab-scale　A2O　process　was　operated　for　the　treatment　of　domestic　wastewater　with　low　C/N　ratios.　Short-cut　nitrification　and　denitrification　was　achieved　by　controlling　low　DO　concentration　of　0.3~0.5　mg/L　and　higher　internal　recycle　ratios　to　decrease　the　actual　aerobic　hydraulic　retention　time　(HRT).　The　average　nitrite　accumulation　rate　reached　about　90%.　When　the　C/N　ratio　was　2.34,　about　75.4%　of　TN　could　be　removed　in　the　short-cut　nitrification　A2O　process.　The　effects　of　different　carbon　sources,　nitrification　types　and　DO　levels　on　nitrogen　removal　efficiencies　in　the　A2O　process　were　also　investigated.　The　experimental　results　showed　that　the　short-cut　nitrification　at　low　DO　concentrations　had　the　same　TN　removal　efficiency　as　the　complete　nitrification　with　the　extra　carbon　sources.　Moreover,　the　activated　sludge　settling　characteristics　did　not　deteriorate.　Even　when　the　seed　sludge　was　bulking　sludge,　sludge　settling　and　treatment　performance　was　improved　under　low　DO　conditions　(0.3~0.5　mg/L).

关键词：

A2O process; Domestic wastewater; Short-cut nitrification and denitrification

作者机构：

[ 1 ] [Zeng, W.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Li, L.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Yang, Y.-Y.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Zhang, Y.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Wang, S.-Y.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

通讯作者信息：

王淑莹
[Wang, S.-Y.]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

电子邮件地址：

wsy@bjut.edu.cn

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