Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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Monitoring of Hydrogen Sulfide in Anaerobic Co-digestion of Swine Manure and Food Waste

돈분 및 음식물쓰레기 혼용 혐기소화 시 황화수소 가스 모니터링

  • Shin, JoungDu (Department of Climate Change and Ecology, Agro-Environmental Division, National Institute of Agricultural Science and Technology, RAD) ;
  • Sung, Shihwu (Department of Civil, Concentration and Environmental Engineering, Ames, Iowa State University) ;
  • Kim, Hyunook (Department of Environmental Engineering, University of Seoul) ;
  • Kim, SamcCeun (Department of Climate Change and Ecology, Agro-Environmental Division, National Institute of Agricultural Science and Technology, RAD) ;
  • Lee, MyoungSun (Collage of Life&Science, Sang-Ji University)
  • 신중두 (농촌진흥청 국립농업과학원) ;
  • 성시우 (아이오와 주립대학교 도시건설환경공학과) ;
  • 김현욱 (서울시립대학교 환경공학과) ;
  • 김삼권 (농촌진흥청 국립농업과학원) ;
  • 이명선 (상지대학교 식물자원학부)
  • Received : 2008.11.07
  • Accepted : 2008.12.01
  • Published : 2008.12.31
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Abstract

Objective of this study was to monitor the hydrogen sulfide production rate and concentration in anaerobic co-digestion of swine manure and food waste for biogas production in order to alternate the petroleum based energy. Anaerobic co-digestion for biogas production was performed in serum bottles at 2% volatile solids (VS) concentration and various mixing ratios of two substrates(swine manure: food waste = 100:0 ~ 0:100). Although hydrogen sulfide production rates were varied with digestion periods at different treatments, it was observed that hydrogen sulfide produced in the swine manure alone was lower at 2.4 fold than that of food waste. For effects of hydrogen sulfide concentration in the different mixing ratios of swine manure to food waste, the higher food waste ratio the higher hydrogen sulfide concentration. Also its average concentrations were varied from 0.1452% in the swine waste only to 0.3420% in the food waste alone. For the composition ratio of bio-gas in their anaerobic co-digestion, it appeared that there was 53.2% of $CH_4$, 23.9% of $CO_2$, 0.3% of $H_2S$ and 22.7% of miscellaneous gases including moisture.

본 연구의 목적은 석유화학에너지를 대체하기 위해 바이오가스 생산을 위한 돈분 및 음식물쓰레기 혼용 혐기소화 시 황화수소가스 농도 및 발생비율을 모니터링 한 것이었다. 바이오가스 생산을 위한 혼합혐기 소화는 휘발성 고형물 2%기준 다양한 돈분 및 음식물쓰레기 혼합비율하에서 시럼병을 이용하여 수행하였다. 황화수소가스 발생비율은 처리별 소화기간에 따라 다양하다 할지라도, 수급원료를 돈분만을 이용한 경우는 음식물 쓰레기와 비교할 때 황화수소 발생량은 2.4배 낮게 나타난 것으로 관측되었다. 돈분과 음식물쓰레기 혼합비율에 따른 황화수소가스 농도에 미치는 영향에 대해서는 음식물쓰레기 혼합비율이 높으면 높을수록 황화수소 농도가 높게 나타났다. 황화수소가스 평균 농도는 돈분처리, 0.1452% 에서부터 음식물쓰레기 처리, 0.3420% 까지 다양 하였다. 돈분 및 음식물쓰레기 혼용 혐기발효 시 바이오가스 조성비율은 메탄가스가 53.2%, 이산화탄소 23.9%, 황화수소 0.3% 및 수분을 포함한 기타 22.7%로 이루어져 있는 것으로 나타났다.

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