Removal of organic substances and oxidation of ammonium nitrogen by a down-flow hanging sponge (DHS) reactor under high salinity conditions

Shigeki Uemura, Saori Suzuki, Kenichi Abe, Keiichi Kubota, Takashi Yamaguchi, Akiyoshi Ohashi, Yasuyuki Takemura, Hideki Harada

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

A down-flow hanging sponge (DHS) reactor, constructed by connecting three identical treatment units in series, was fed with highly saline artificial coke-plant wastewater containing 1400 mg L-1 of phenol in terms of chemical oxygen demand (COD) and 500 mg-N L-1 of ammonium nitrogen. The COD was removed by the 1st unit, achieving 92% removal at an average COD loading rate of 3.0 kg-COD m-3 d-1 for all units, with oxidation of ammonium nitrogen occurring primarily in the two downstream units. Microbial assays of the different units of the reactor revealed greater numbers of nitrifying bacteria in the 2nd and 3rd units than in the 1st unit, corresponding with the observed ammonium oxidation pattern of the reactor. These findings suggest that a succession of microflora was successfully established along the DHS.

Original languageEnglish
Pages (from-to)5180-5185
Number of pages6
JournalBioresource Technology
Volume101
Issue number14
DOIs
Publication statusPublished - 2010 Jul 1

Keywords

  • Ammonium nitrogen
  • Coke-plant wastewater
  • Down-flow hanging sponge reactor
  • Phenol
  • Salinity

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Removal of organic substances and oxidation of ammonium nitrogen by a down-flow hanging sponge (DHS) reactor under high salinity conditions'. Together they form a unique fingerprint.

  • Cite this