Removal of VOCs and H2S from Waste Gas with Biotrickling Filter

생물살수여과법을 이용한 공기중 VOC 및 H2S 제거

  • Kim, Kyoung-Ok (Department of Environmental Engineering, Yeungnam University) ;
  • Kim, Yong-Je (Department of Environmental Engineering, Yeungnam University) ;
  • Won, Yang-Soo (Department of Environmental Engineering, Yeungnam University)
  • 김경옥 (영남대학교 환경공학과) ;
  • 김용제 (영남대학교 환경공학과) ;
  • 원양수 (영남대학교 환경공학과)
  • Received : 2008.07.07
  • Accepted : 2008.09.16
  • Published : 2008.10.10

Abstract

Biodegradation of toluene, styrene and hydrogen sulfide as model compounds of volatile organic compounds and odor from waste gas was investigated experimentally in a biotrickling filter. This study focussed on the description of experimental results with regard to operating conditions. The effect of varying $H_2S$ load rate and inlet concentration was investigated under autotropic and mixotropic environmental conditions. The $H_2S$ removal efficiencies of greater than 99% were achieved at $H_2S$ loads below $10g/m^3{\cdot}hr$ for each environment. It was observed that the maximum elimination capacity of mixotrophic filter was achieved a little greater than the one of autotrophic filter. The biofiltration of toluene and styrene in trickling bed was examined under different gas flow rates, load rates, and inlet concentrations. Below $40g/m^3{\cdot}hr$ of toluene loading, the elimination capacity and loading were identical and it was completely destroyed. In high loading of toluene, the biotrickling filter was operated at its maximum elimination capacity. In the inlet concentration of 0.2, 0.5, and $1.0g/m^3$, the maximum elimination capacity of toluene showed 40, 45, and $60g/m^3{\cdot}hr$, respectively. After a short adaptation period, it was demonstrated that the results of styrene in originally toluene adapted bioreactor was similar with the ones of toluene. However, the performance of filer for styrene is generally a little lower than for toluene. The operating conditions (including liquid flow rate etc.) allowing the highest removal efficiency should be determined experimentally for each specific case.

Keywords

biotrickling;biodegradation;$H_2S$;volatile organic compound (VOC);toluene;styrene;air pollution control

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