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Characteristics and Phenol Wastewater Treatment of Aerobic Biofilm Reactor Used Rhodococcus sp. EL-GT and Sludge

Rhodococcus sp. EL-GT와 Sludge를 이응한 호기성 생물막 반응기의 특성 및 페놀 처리

  • Park, Geun-Tae (Department of Microbiology, Pusan National University) ;
  • Won, Seong-Nae (Department of Microbiology, Pusan National University) ;
  • Cho, Sun-Ja (Department of Microbiology, Pusan National University) ;
  • Son, Hong-Joo (Department of Biotechnology, Miryang National University) ;
  • Lee, Geon (Department of Microbiology, Pusan National University) ;
  • Lee, Sang-Joon (Department of Microbiology, Pusan National University)
  • 박근태 (부산대학교 미생물학과) ;
  • 원성내 (부산대학교 미생물학과) ;
  • 조순자 (부산대학교 미생물학과) ;
  • 손홍주 (밀양대학교 생물공학과) ;
  • 이건 (부산대학교 미생물학과) ;
  • 이상준 (부산대학교 미생물학과)
  • Published : 2002.06.01

Abstract

The research was performed to compare to the biofilm characteristics and phenol removal efficiency in RBCs(Rotating Biological Contactor) using Rhodococcus sp. EL-GT(single population) and activated sludge(mixed population) as inoculum. Both reactors showed similar tendency on variations of dry weight, thickness and dry density of biofilm. However, the growth of biofilm thickness in 3 and 4 stage of single population reactor has sustained longer than that of the mixed population reactor. Unlike the mixed population reactor, the dry density of biofilm in the single population reactor had a difference between 1, 2 stage and 3, 4 stage. The single population reactor was stably operated without the decrease of phenol removal efficiency in the range of pH 6 ~ 9 and 15mM phenol was completely degraded in these pH ranges. But in case of the mixed population reactor, the phenol degradability was dramatically decreased at over 5mM phenol concentration because of the overgrowth and detachment of its biofilm.

Keywords

Rhodococcus;sludge;RBC;biofilm reactor

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