Low strength wastewater treatment under low temperature conditions by a novel sulfur redox action process

T. Yamaguchi, Y. Bungo, Masanobu Takahashi, H. Sumino, Akihiro Nagano, N. Araki, T. Imai, S. Yamazaki, H. Harada

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The objective of this research is to make a novel wastewater treatment process activated by a sulfur-redox cycle action of microbes in low temperature conditions. This action is carried out by sulfate-reducing bacteria (SRB) and sulfur-oxidizing bacteria (SOB). The process was comprised of a UASB reactor as pre-treatment and an aerobic downflow hanging sponge (DHS) reactor as post-treatment. As the results of reactor operation, the whole process achieved that over 90% of CODcr removal efficiency, less than 30 mgCODcr/L (less than 15 mgBOD/L) of final effluent, at 12 h of HRT and at 8°C of UASB reactor temperature. Acetobacterium sp. was detected as the predominant species by PCR-DGGE method targeting 16SrDNA with band excision and sequence analysis. In the UASB reactor, various species of sulfate-reducing bacterium, Desulfobulbus sp., Desulfovibrio sp., and Desulfomicrobium sp., were found by cloning analysis. In the DHS reactor, Tetracoccus sp. presented as dominant. The proposed sulfur-redox action process was considered as an applicable process for low strength wastewater treatment in low temperature conditions.

Original languageEnglish
Pages (from-to)99-105
Number of pages7
JournalWater Science and Technology
Issue number6
Publication statusPublished - 2006
Externally publishedYes


  • Downflow hanging sponge reactor
  • Low strength wastewater
  • Low temperature
  • Sulfate-reducing bacteria
  • Sulfur-oxidizing bacteria
  • Sulfur-redox action

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology


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