Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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Effect of biogas production to different anaerobic digestion systems and feeding stocks

혐기소화 공정 및 원료 유형별 바이오가스 생산에 미치는 영향

  • Shin, JoungDu (Climate Change & Agroecology division, National Academy of Agricultural Science, RDA) ;
  • Hong, Seung-Gil (Climate Change & Agroecology division, National Academy of Agricultural Science, RDA) ;
  • Park, Woo-Kyun (Climate Change & Agroecology division, National Academy of Agricultural Science, RDA) ;
  • Park, SangWon (Bio-resources Management Division, Research Policy Bureau, RDA)
  • 신중두 (농촌진흥청 국립농업과학원 기후변화생태과) ;
  • 홍승길 (농촌진흥청 국립농업과학원 기후변화생태과) ;
  • 박우균 (농촌진흥청 국립농업과학원 기후변화생태과) ;
  • 박상원 (농촌진흥청 생명자원관리과)
  • Received : 2011.10.21
  • Accepted : 2011.12.23
  • Published : 2011.12.31
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Abstract

Objective of this study was to investigate the effect of biogas production to different systems and feeding stocks. For the biogas production through operating the temperature phase anaerobic digestion(TPAD) with different feeding stocks, the stage state of biogas production with 70% of methane concentration in the thermophilic digestion tank with co-digestion of food waste and swine manure(40 : 60) was delayed at 3.5 times, but its mesophilic tank was short for 5 days as relative to the swine manure. The cumulative methane production in the thermophilic digestion tank with co-digestion of food waste and swine manure was started with greater than its swine manure at 60 days after digestion periods. However, its mesophilic tank with swine manure was great at 3 days after digestion periods. For aspect of anaerobic digestion processes with swine manure, it was appeared that the stage state of biogas production rate in TPAD was shorter than the two phase anaerobic digestion system.

본 연구의 목적은 TPAD(Temperature Phased Anaerobic Digestion)시스템 [고온조($55^{\circ}C$)와 중온조 ($35^{\circ}C$)]과 이상혐기소화시스템[중온조($35^{\circ}C$)와 중온조($35^{\circ}C$)]공정을 비교하고, 이러한 공정을 적용한 유기성 자원별 바이오가스 생산량을 비교하는 것이었다. 원료별 TPAD시스템을 적용한 바이오가스 생산량을 비교해 볼 때, 고온조에서 돈분과 음식물류폐기물을 혼합한 원료를 사용한 경우는 돈분만 사용하였을 때 보다 혐기소화 공정의 안정화에 걸리는 기간은 3.5배가 지연되었지만, 중온조의 경우, 돈분과 음식물류폐기물을 혼용 처리하였을때 메탄가스 농도 약 70%로 체류시간을 5일 앞당겨 안정화 단계에 도달하는 것으로 나타났다. 돈분과 음식물류폐기물을 혼합한 원료의 경우 고온조에서 혐기소화 60일을 기점으로, 또한 중온조의 경우 초기단계인 혐기소화 3일 후부터 돈분만 사용한 경우 보다 누적 메탄가스 발생량이 많게 나타났다. 또한 혐기소화 공정측면에서 돈분을 이용한 TPAD시스템 운영은 이상혐기소화시스템보다 조기에 공정의 안정화 단계에 도달하는 것으로 나타났다.

Keywords

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