Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Biodegradation of Benzne,Toluene, and Phenol by a Mixed Culture in Semicontinuous Culture

반연속배양의 혼합균주에 의한 Benzene, Toluene 및 Phenol 혼합물 분해

  • 오희목 (한국과학기술연구원 유전공학연구소) ;
  • 김성빈 (한국과학기술연구원 유전공학연구소) ;
  • 이창호 (한국과학기술연구원 유전공학연구소) ;
  • 서현효 (한국과학기술연구원 유전공학연구소) ;
  • 이문호 ((주) 화랑환경) ;
  • 고영희 (한국과학기술연구원 유전공학연구소) ;
  • 윤병대 (한국과학기술연구원 유전공학연구소)
  • Published : 1994.08.01
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Abstract

The biodegradation of aromatic compounds by a mixed culture GE1 was investigated in an artificial wastewater containing 250 mg/l of benzene, toluene, and phenol in semicontinuous culture. In the control group (no strains) with an aeration rate of 75 ml/l/min, 37% of phenol and 83% of benzene were volatilized during early 24 hrs and toluene was disappeared from the medium within 12 hrs. The biodegradation of benzene and toluene was effective in SB (strains + biofilm) treatment, while phenol was degraded more quickly in SG (strains + glucose) treatment including glucose as an additional carbon source. aromatic compounds added at a concentration of 250 mg/l were completely removed by SG treatment after 16 hrs or 32 hrs, respectively. The removal rate of COD was high as much as 80 mg/l/h in SG treatment during early period, but COD revealed a stable value of 116~140 mg/l after 12 hrs caused by increased biomass. Therefore, it is concluded that the mixed GE1 could be used for the wastewater treatment including aromatic compounds such as benzene, toluene, and phenol.

Keywords

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