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Author:

Gong, Youkui (Gong, Youkui.) | Wang, Shuying (Wang, Shuying.) (Scholars:王淑莹) | Wang, Shasha (Wang, Shasha.) | Wang, Sai (Wang, Sai.)

Indexed by:

EI Scopus PKU CSCD

Abstract:

The effect of C/N ratio on kinetics of nitrite denitrification, as well as the corresponding N2O accumulation and reduction were investigated in a 3 L sequencing batch reactor. The initial 20 mg N·L-1 NO2--N was obtained by adding NaNO2. The C/N ratios 1.8, 2.5, 3.2 and 4.5 were reached by adding 0, 0.05, 0.1, 0.2 ml ethanol respectively. The highest N2O accumulation was 333, 200, 245 and 256 μmol·L-1 for each C/N ratio. The nitrite reduction and N2O production rate increased with the increase of C/N ratio. The reduction rate of N2O was about 35-45 mg N·(g MLSS)-1·h-1 for using internal carbon sources as electron donor and 172 mg N·(g MLSS)-1·h-1 for using external carbon source. The accumulation of N2O at the initial of denitrification process was attributed to the imbalance between synthesis of NO2- reductase and N2O reductase. Under lower C/N ratio, the competition of nitrite reductase and nitrous oxide reductase for electron donor resulted in accumulation of N2O. Under higher C/N ratio, the reduction of NO2- and N2O happened simultaneously and large amount of N2O accumulation may not happen. © All Rights Reserved.

Keyword:

Batch reactors Carbon Nitrogen oxides Denitrification Sodium compounds

Author Community:

  • [ 1 ] [Gong, Youkui]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 2 ] [Wang, Shuying]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 3 ] [Wang, Shasha]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 4 ] [Wang, Sai]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, China

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Source :

CIESC Journal

ISSN: 0438-1157

Year: 2011

Issue: 7

Volume: 62

Page: 2049-2054

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 10

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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