On-site evaluation of the performance of a full-scale down-flow hanging sponge reactor as a post-treatment process of an up-flow anaerobic sludge blanket reactor for treating sewage in India

Tsutomu Okubo, Takashi Onodera, Shigeki Uemura, Takashi Yamaguchi, Akiyoshi Ohashi, Hideki Harada

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A down-flow hanging sponge (DHS) reactor is a novel, unaerated, aerobic, biofilm reactor that is used to polish effluent received from an up-flow anaerobic sludge blanket (UASB) reactor for treating municipal sewage. A full-scale DHS reactor was constructed for post-treatment of a full-scale UASB reactor at a municipal sewage treatment plant in India. Performance of the DHS reactor was evaluated with respect to organic removal over 1800days of continuous operation. The UASB+DHS system consistently produced effluent with chemical oxygen demand (COD), biochemical oxygen demand (BOD), and suspended solids (SS) values of 37, 6.0 and 19mgL-1, on average, respectively. The sludge yield of the DHS reactor was estimated to be 0.04kgSSkg-1 COD removed or 0.12kgSSkg-1 BOD removed, which is considerably lower than other aerobic treatment methods that have been employed for polishing UASB effluent.

Original languageEnglish
Pages (from-to)156-164
Number of pages9
JournalBioresource Technology
Volume194
DOIs
Publication statusPublished - 2015 Oct 1

Keywords

  • Developing countries
  • Down-flow hanging sponge (DHS)
  • Municipal sewage treatment
  • Organic removal
  • Up-flow anaerobic sludge blanket (UASB)

ASJC Scopus subject areas

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

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