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Integrated simultaneous desulfurization and denitrification (ISDD) process at various COD/sulfate ratios

  • Chuan Chen
  • , Lihong Liu
  • , Duu-Jong Lee
  • , Wanqian Guo
  • , Aijie Wang
  • , Xijun Xu
  • , Xu Zhou
  • , Donghai Wu
  • , Nanqi Ren

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Abstract

The integrated simultaneous desulfurization and denitrification (ISDD) is a novel treatment process to handle sulfate and nitrate-laden wastewaters of high loadings. This study experimentally explored the effect of COD/SO42- ratio on the performance of ISDD process, particularly considering the complex interactions between sulfate-reducing bacteria (SRB), heterotrophic denitrifiers (hNRB) and autotrophic denitrifiers (aNRB). There existed an optimal COD/SO42- ratio (=1.5:1 in the present study) to reach 100% SO42- and NO3- removals and 42.6% S0 recovery. At COD/SO42-=1.5:1, the functional strains could form granules with high retention in the ISDD reactor. The microbial community analysis identified the SRB, hNRB and aNRB in the studied system, whose shifts correlated well with the noted ISDD performance change at different COD/SO42- ratio. Interactions between different groups of bacteria and the possible strategy to enhance the ISDD performance were discussed. © 2013 Elsevier Ltd.
Original languageEnglish
Pages (from-to)161-169
JournalBioresource Technology
Volume155
DOIs
Publication statusPublished - Mar 2014
Externally publishedYes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 6 - Clean Water and Sanitation
    SDG 6 Clean Water and Sanitation

Research Keywords

  • Carbon to sulfate ratio
  • Denitrification
  • Denitrifiers
  • Desulfurization
  • Sulfate-reducing bacteria

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