Nitrite Accumulation during the Denitrification Process in SBR for the Treatment of Pre-treated Landfill Leachate

孙洪伟; 杨庆; 彭永臻; 时晓宁; 王淑莹; 张树军

doi:10.1016/S1004-9541(08)60312-2

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Nitrite Accumulation during the Denitrification Process in SBR for the Treatment of Pre-treated Landfill Leachate

Updated：2026-01-06

- Nitrite Accumulation during the Denitrification Process in SBR for the Treatment of Pre-treated Landfill Leachate
- Chinese Journal of Chemical Engineering Vol. 17, Issue 6, Pages: 1027-1031(2009)
- Affiliations：
  
  Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology,Beijing,China,100124
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(08)60312-2
  CLC：
- Published：2009
- Accepted：
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SUN Hongwei, YANG Qing, PENG Yongzhen, SHI Xiaoning, WANG Shuying, ZHANG Shujun. Nitrite Accumulation during the Denitrification Process in SBR for the Treatment of Pre-treated Landfill Leachate[J]. , 2009, 17(6): 1027-1031.
DOI：

SUN Hongwei, YANG Qing, PENG Yongzhen, SHI Xiaoning, WANG Shuying, ZHANG Shujun. Nitrite Accumulation during the Denitrification Process in SBR for the Treatment of Pre-treated Landfill Leachate[J]. , 2009, 17(6): 1027-1031. DOI： 10.1016/S1004-9541(08)60312-2.

摘要

Abstract

The nitrite accumulation in the denitrification process is investigated with sequencing batch reactor(SBR) treating pre-treated landfill leachate in anoxic/anaerobic up-flow anaerobic sludge bed(UASB).Nitrite accumulates obviously at different initial nitrate concentrations(64.9

54.8

49.3 and 29.5 mg·L

-1

) and low temperatures

and the two break points on the oxidation-reduction potential(ORP) profile indicate the completion of nitrate and nitrite reduction.Usually

the nitrate reduction rate is used as the sole parameter to characterize the denitrification rate

and nitrite is not even measured.For accuracy

the total oxidized nitrogen(nitrate + nitrite) is used as a measure

though details characterizing the process may be overlooked.Additionally

batch tests are conducted to investigate the effects of C/N ratios and types of carbon sources on the nitrite accumulation during the denitrification.It is observed that carbon source is sufficient for the reduction of nitrate to nitrite

but for further reduction of nitrite to nitrogen gas

is deficient when C/N is below the theoretical critical level of 3.75 based on the stoichiometry of denitrification.Five carbon sources used in this work

except for glucose

may cause the nitrite accumulation.From experimental results and cited literature

it is concluded that

Alcaligene

species may be contained in the SBR activated-sludge system.

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