Effect of the mixing ratio during co-treatment of landfill leachate and sewage with a combined stripping and reversed A2/O process

Xiao Lan Zeng, Wen Chuan Ding, Zhi Zhang, Peng Wan, Yang Deng, Shuangshuang Wang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In this study, pilot-scale tests were conducted to evaluate the effect of volumetric mixing ratio of landfill leachate to sewage on the performance of the combined ammonia stripping and reversed anaerobic/anoxic/oxic (A2/O) process for co-treatment of landfill leachate and municipal sewage. Stripping, as pre-treatment, could significantly remove ammonia nitrogen (NH3-N) and total nitrogen (TN) by 55% and 52%, respectively. Moreover, chemical oxygen demand (COD) was slightly reduced by 6.8%, and little total phosphorus (TP) was removed. The subsequent reversed A2/O process appeared to be highly influenced by the volumetric mixing ratio of leachate to sewage. Typically, the effluent COD, NH3-N, TN and TP increased with the increasing ratio from 1:30 to 1:15, namely, the increasing fraction of leachate. Over the all tested mixing ratio range, the effluent COD and NH3-N were satisfied with the primary B standards of Chinese Discharge Standard of Pollutants for municipal waste water treatment plant (GB18918-2002). The standards different from the primary A standards for water reuse are used for discharge into the most surface water bodies in China. However, TN and TP would exceed the primary B standard levels at a mixing ratio of 1:15 or greater. These findings suggest that an appropriate volumetric mixing ratio should be carefully selected to ensure the performance of the reversed A2/O process.

Original languageEnglish
Pages (from-to)2668-2673
Number of pages6
JournalEnvironmental Technology (United Kingdom)
Volume36
Issue number20
DOIs
StatePublished - 18 Oct 2015

Fingerprint

Chemical Water Pollutants
Sewage
mixing ratio
sewage
Chemical oxygen demand
Nitrogen
chemical oxygen demand
Phosphorus
nitrogen
phosphorus
Ammonia
leachate
Effluents
ammonia
effluent
Water treatment plants
Surface waters
Wastewater
effect
landfill leachate

Keywords

  • ammonia stripping
  • landfill leachate
  • reversed A/O
  • sewage
  • volumetric mixing ratio

Cite this

Zeng, Xiao Lan ; Ding, Wen Chuan ; Zhang, Zhi ; Wan, Peng ; Deng, Yang ; Wang, Shuangshuang. / Effect of the mixing ratio during co-treatment of landfill leachate and sewage with a combined stripping and reversed A2/O process. In: Environmental Technology (United Kingdom). 2015 ; Vol. 36, No. 20. pp. 2668-2673.
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Effect of the mixing ratio during co-treatment of landfill leachate and sewage with a combined stripping and reversed A2/O process. / Zeng, Xiao Lan; Ding, Wen Chuan; Zhang, Zhi; Wan, Peng; Deng, Yang; Wang, Shuangshuang.

In: Environmental Technology (United Kingdom), Vol. 36, No. 20, 18.10.2015, p. 2668-2673.

Research output: Contribution to journalArticle

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AU - Zeng, Xiao Lan

AU - Ding, Wen Chuan

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AU - Wan, Peng

AU - Deng, Yang

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