Effect of ammonium and nitrite on performance of continuous CANON reactor - Details

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Abstract：

To　increase　the　TN　(total　inorganic　nitrogen)　removal　efficiency,　a　CANON　(completely　autotrophic　nitrogen-removal　over　nitrite)　reactor,　which　started　directly　under　aerobic　conditions　in　the　laboratory　was　used.　The　temperature　was　controlled　at　35°C±1°C,　aeration　rate　was　31.2　m3/(m3·h),　dissolved　oxygen　was　about　1.5-2.0　mg/L,　hydraulic　retention　time　was　3.7　h　respectively.　Tests　of　ammonium　and　nitrite　concentration　on　performance　of　CANON　reactor　were　conducted.　It　is　found　that　when　the　aeration　rate　is　kept　stable,　it　is　not　suitable　to　obtain　high　TN　removal　rate　when　the　ammonium　concentration　is　too　high　or　too　low.　When　the　ammonium　concentration　is　about　310-360　mg/L,　a　TN　removal　rate　of　more　than　75%　is　gained　under　the　above-mentioned　conditions.　Increasing　the　concentration　of　ammonium　and　nitrite　in　the　reactor　is　beneficial　to　improve　the　TN　removal　load　until　both　concentrations　of　ammonium　and　nitrite　is　more　than　50　mg/L.　When　the　CANON　reactor　is　used　to　treat　ammonium-rich　wastewater　without　any　organic　carbon,　the　TN　concentration　in　effluent　is　still　high,　and　a　further　step　is　necessary　to　meet　discharge　standards.

Keyword：

Effluents Organic carbon Dissolved oxygen Wastewater treatment Nitrogen removal

Author Community：

[ 1 ] [Fu, Kun-Ming]Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Fu, Kun-Ming]Key Laboratory of Urban Stormwater System and Water Environment, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
[ 3 ] [Zhang, Jie]Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Cao, Xiang-Sheng]Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Li, Dong]Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
[ 6 ] [Meng, Xue-Zheng]Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
[ 7 ] [Zhu, Zhao-Liang]Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
[ 8 ] [Wang, Jun-An]Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China