Comparative study of two biological nitrogen removal processes: A/O process and step-feeding process - 文章详情页

作者：

Zhu, Guibing (Zhu, Guibing.) | Peng, Yongzhen (Peng, Yongzhen.) (学者：彭永臻) | Wang, Shuying (Wang, Shuying.) (学者：王淑莹) | Ma, Bin (Ma, Bin.)

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EI Scopus

摘要：

Two　biological　nitrogen　removal　processes　are　compared　in　the　aspect　of　nitrogen　removal,　process　operation　and　energy　saving.　Results　show　that　when　the　returned　sludge　ratio　is　50%　of　the　inflow　rate,　the　step-feeding　process　achieves　over　80%　total　nitrogen　(TN)　removal　efficiency,　but　the　TN　removal　efficiency　of　the　A/O　process　is　only　40%.　Moreover,　filamentous　sludge　bulking　can　be　well　restrained　in　the　step-feeding　process.　Given　the　conditions　of　a　returned　sludge　ratio　of　100%　and　a　nitrifying　liquor　recycle　ratio　of　200%,　the　TN　removal　efficiency　is　78.32%　in　the　A/O　process,　but　the　sludge　volume　index　(SVI)　value　increases　to　143　mL/g.　In　the　step-feeding　process,　the　SVI　is　only　94.4　mL/g　when　the　TN　removal　efficiency　reaches　81.1%.　The　step-feeding　process　has　distinct　advantages　over　the　A/O　process　in　the　aspects　of　practicability,　nitrogen　removal　and　operating　stability.

关键词：

Activated sludge process Efficiency Energy conservation Feeding Nitrogen removal Sewage sludge

作者机构：

[ 1 ] [Zhu, Guibing]School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
[ 2 ] [Zhu, Guibing]State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
[ 3 ] [Peng, Yongzhen]School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
[ 4 ] [Peng, Yongzhen]Key Lab. of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100022, China
[ 5 ] [Wang, Shuying]Key Lab. of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100022, China
[ 6 ] [Ma, Bin]School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China

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