Degradation of xenobiotic substances using sulfate-reducing bacteria in a UASB reactor

S. Tsuneda, T. Shiono, K. Nakamura, T. Dogan, A. Hirata

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

An upflow anaerobic sludge blanket (UASB) reactor was successfully applied to continuous degradation of ferric ethylene diamine tetraacetate (Fe-EDTA) as a typical xenobiotic substance contained in photo-processing wastewater. The sludge in the UASB reactor had an abundance of sulfate-reducing bacteria (SRB), which had been anaerobically cultivated in a sulfate-rich culture medium including Fe-EDTA and yeast-extract as the carbon sources. Since the prominent reductions of Fe-EDTA and sulfate ion were observed, the contribution of SRB to Fe-EDTA degradation in the UASB reactor was confirmed. The aggregated sludge in the UASB reactor became gradually large reaching steady state with an equivalent diameter of 60-90 μm after 124 days operation. An increase of the amount of yeast extract addition to feed solution improved the Fe-EDTA removal efficiency up to 90%. Moreover, the combination of ozone treatment with SRB treatment further improved removal efficiency of total organic carbon (TOC) in an actual photo-processing wastewater composed of fixing and developing wastes.

Original languageEnglish
Pages (from-to)227-234
Number of pages8
JournalWater Science and Technology
Volume48
Issue number11-12
Publication statusPublished - 2004 Jan 27

Keywords

  • Ferric ethylene diamine tetra acetate (Fe-EDTA)
  • Ozone treatment
  • Photo-processing wastewater
  • Sulfate-reducing bacteria (SRB)
  • Upflow anaerobic sludge blanket (UASB)

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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