Effects of Influent Flow and Nitrifying Fluid Return Flow on Low ρ(C)/ρ(N) Ratio of Real Domestic Sewage Treatment in an A2N2 System [进水量和硝化液回流量对A2N2系统处理低ρ(C)/ρ(N)实际生活污水的影响] - 文章详情页

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摘要：

To　achieve　effectiveness　of　nitrogen　and　phosphorus　removal,　a　two-sludge　denitrifying　phosphorus　removal　system　(A2N2)　was　used　to　treat　low　ρ(C)/ρ(N)　ratio　real　domestic　wastewater.　Based　on　different　influent　flows　(characterized　by　influent　ratio)　and　nitrifying　fluid　return　flows(characterized　by　exchange　ratio)　conditions,　the　system　achieved　efficient　denitrifying　phosphorus　removal　performance.　The　experiment　was　conducted　as　follows:　anaerobic　was　set　as　1.5　h,　anoxic　was　2　h,　and　aerobic　was　10　min　in　the　A-SBR　unit.　First　the　nitrification　duration　time　was　4　h.　Second,　the　nitrification　duration　time　was　1　h　in　the　N-SBR　units.　The　aeration　flow　rate　of　A-SBR　and　N-SBR　units　was　100　and　120　L/h,　respectively,and　the　filling　rate　was　66%.　Under　this　condition,　nine　different　parameters　were　experimentally　tested　by　varying　the　influent　ratio　R1　(70%,　75%,　and　80%)　and　the　exchange　ratio　of　R2　(70%,　75%,　and　80%),　respectively.　Results　show　that　under　the　condition　of　different　influent　ratios　and　exchange　ratios,　the　A2N2　system　can　remove　COD　stably　and　efficiently.　The　average　COD　removal　rate　in　each　stage　is　above　80%.　However,　the　removal　performance　of　TN　is　significantly　different,　which　is　61.67%-78.3%.　When　the　influent　ratio　and　exchange　ratio　are　70%　and　80%,the　TN　removal　rate　of　A2N2　system　is　the　best,　which　is　78.3%.　The　average　effluent　TN　is　9.2　mg/L.　In　the　aspect　of　phosphorus　removal,　the　exchange　ratio　increases　from　70%　to　80%　and　the　denitrifying　phosphorus　removal　rate　remains　above　99%.　The　effluent　phosphorus　concentration　is　below　0.1　mg/L.　©　2019,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.

关键词：

A2N2 two-sludge system; Denitrifying phosphorus removal; Influent ratio and exchange ratio; Low ρ(C)/ρ(N) ratio; TN removal performance

作者机构：

[ 1 ] [Wang, S.]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [Huang, Y.]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 3 ] [Wang, M.]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Wang, M.]Beijing Drainage Group Technology Research and Development Center, Beijing, 100044, China
[ 5 ] [Zhao, W.]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 6 ] [Pan, C.]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 7 ] [Peng, Y.]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China

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