Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Application of Ozone Oxidation to Reduce the Biological Treatment Time of Petrochemical Wastewater

석유화학 폐수의 생물학적 처리시간 단축을 위한 오존 산화의 적용

  • Hong, Eun-Sik (School of Chemical Engineering and Bioengineering, University of Ulsan) ;
  • Kim, Hyun-Suk (School of Chemical Engineering and Bioengineering, University of Ulsan) ;
  • Lee, Sang-Hee (Hanwha Chemical Co.) ;
  • Chung, Jin-Suk (School of Chemical Engineering and Bioengineering, University of Ulsan) ;
  • Shin, Eun-Woo (School of Chemical Engineering and Bioengineering, University of Ulsan) ;
  • Ryu, Keun-Garp (School of Chemical Engineering and Bioengineering, University of Ulsan) ;
  • Yoo, Ik-Keun (School of Chemical Engineering and Bioengineering, University of Ulsan)
  • 홍은식 (울산대학교 생명화학공학부) ;
  • 김현석 (울산대학교 생명화학공학부) ;
  • 이상희 (한화석유화학(주)) ;
  • 정진석 (울산대학교 생명화학공학부) ;
  • 신은우 (울산대학교 생명화학공학부) ;
  • 류근갑 (울산대학교 생명화학공학부) ;
  • 유익근 (울산대학교 생명화학공학부)
  • Published : 2006.05.31
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Abstract

The efficacy of integrated ozone oxidation-biodegradation treatment was examined in the treatment of petrochemical wastewater with a special focus on the overall treatment time. When raw wastewater with chemical oxygen demand(COD) of 70-80 mg/L was oxidized by ozone, approximately 20% of initial COD was removed in less than 1.5 min at a dosing rate of 400 mg $O_3/L{\cdot}h $. No further decrease in COD was observed for the extended ozone treatment up to 30 min. Biological treatment alone showed a rapid reduction of COD to 40-50 mg/L, subsequently resulting in the decreased rate of COD removal. Pre-treatment by ozone before biological treatment did not significantly affect the specific rate of COD removal in a biological treatment. When ozone oxidation followed biological treatment, the extent of COD removal by ozone oxidation was greater compared to that of biologically-treated wastewater for a shorter time. Taken together, it was decided that the biological treatment time could be reduced if the treatment processes of concern will be properly arranged.

Keywords

References

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