Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Removal Characteristics of Volatile Organic Compounds in Biofilters and Stoichiometric Analysis of Biological Reaction by Carbon Mass Balance

바이오필터의 휘발성유기화합물 제거특성 및 탄소물질수지를 이용한 생물반응의 양론적 해석

  • Kim, Dae-Keun (Department of Environmental Engineering, Seoul National University of Science and Technology)
  • 김대근 (서울과학기술대학교 환경공학과)
  • Received : 2010.05.28
  • Accepted : 2010.08.13
  • Published : 2010.08.31
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Abstract

This study was performed to investigate the removal characteristics of volatile organic compounds (VOCs) in the gasphase biofilters, and to propose a stoichiometric analysis approach to characterize biological reaction through carbon mass balance. The VOCs studied were toluene, styrene, methyl ethyl ketone (MEK), and methyl isobutyl ketone (MIBK) as a single substrate for each biofilter. The critical loading rate was determined to be $46.9\;g/m^3{\cdot}hr$, $25.8\;g/m^3{\cdot}hr$, $96.3\;g/m^3{\cdot}hr$, and $66.5\;g/m^3{\cdot}hr$ for toluene, styrene, MEK, and MIBK, respectively. The obtained results indicated that the critical loading rate was well correlated the octanol-water partition coefficient. In the analysis of carbon mass balance, carbon recovery to $CO_2$ became relatively lower as substrate loadings increased, but higher for carbon recovery to biomass. Stoichiometric analysis revealed that biomass yield increased as substrate loadings increased, and its coefficient (g biomass/g substrate) varied from 0.31 to 0.57 for toluene, 0.29 to 0.57 for styrene, 0.08 to 0.56 for MEK, and 0.14 to 0.53 for MIBK.

본 연구는 바이오필터의 기질분해특성을 파악하기 위하여 휘발성유기화합물을 대상으로 임계부하량과 기질특성의 상관관계를 분석하였고, 탄소물질수지를 이용한 생물반응의 양론적 해석을 수행하였다. 반응기에 공급된 기질은 단일물질이며, toluene, styrene, MEK, MIBK를 선정하였다. 바이오필터의 기질임계부하량은 toluene은 $46.9\;g/m^3{\cdot}hr$, styrene은 $25.8\;g/m^3{\cdot}hr$, MEK는 $96.3\;g/m^3{\cdot}hr$, MIBK는 $66.5\;g/m^3{\cdot}hr$이었으며, 임계부하량은 옥탄올-물 분배계수(KOW)와 높은 상관관계를 보였다. 또한 기질부하량이 증가할수록 물질수지 중 $CO_2$에 의한 탄소회수율은 낮아졌고, 바이오매스에 의한 탄소회수율은 높아지는 경향을 보였다. 생물양론적 해석을 통하여 추정된 biomass yield (g biomass/g substrate)는 기질부하량이 증가할수록 커졌으며, toluene은 0.31~0.57, styrene은 0.29~0.57, MEK는 0.08~0.56, MIBK는 0.14~0.53의 변화폭을 보였다.

Keywords

References

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