Performance of a pilot-scale sewage treatment: An up-flow anaerobic sludge blanket (UASB) and a down-flow hanging sponge (DHS) reactors combined system by sulfur-redox reaction process under low-temperature conditions

Masanobu Takahashi, Takashi Yamaguchi, Yoshiharu Kuramoto, Akihiro Nagano, Satoshi Shimozaki, Haruhiko Sumino, Nobuo Araki, Shinichi Yamazaki, Shuji Kawakami, Hideki Harada

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Performance of a wastewater treatment system utilizing a sulfur-redox reaction of microbes was investigated using a pilot-scale reactor that was fed with actual sewage. The system consisted of an up-flow anaerobic sludge blanket (UASB) reactor and a down-flow hanging sponge (DHS) reactor with a recirculation line. Consequently, the total CODCr (465±147mgL-1; total BOD of 207±68mgL-1) at the influent was reduced (70±14mgL-1; total BOD of 9±2mgL-1) at the DHS effluent under the conditions of an overall hydraulic retention time of 12h, a recirculation ratio of 2, and a low-sewage temperature of 7.0±2.8°C. A microbial analysis revealed that sulfate-reducing bacteria contributed to the degradation of organic matter in the UASB reactor even in low temperatures. The utilized sulfur-redox reaction is applicable for low-strength wastewater treatment under low-temperature conditions.

Original languageEnglish
Pages (from-to)753-757
Number of pages5
JournalBioresource Technology
Volume102
Issue number2
DOIs
Publication statusPublished - 2011 Jan 1

Keywords

  • Actual sewage
  • DHS
  • Sulfur-redox reaction
  • UASB

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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