에너지공학 (Journal of Energy Engineering)

  • 제23권3호
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  • Pages.125-131
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  • 2014
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  • 1598-7981(pISSN)
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  • 2713-7074(eISSN)
한국에너지학회 (The Korean Society for Energy)
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매립지 주입을 위한 음폐수 산발효 시 반응기 형태와 체류시간에 따른 특성

Characteristics of Anaerobic Acid Fermentation with Food waste leachate by Reactor Type of Retention Time for Landfill Site Injection

  • 문광석 (서울과학기술대학교 에너지환경대학원) ;
  • 김재형 (서울과학기술대학교 에너지환경대학원) ;
  • 구혜민 (서울과학기술대학교 에너지환경대학원) ;
  • 임준혁 (서울과학기술대학교 에너지환경대학원) ;
  • 김낙주 (서울과학기술대학교 에너지환경대학원) ;
  • 장원석 (한국지역난방공사 기술연구소) ;
  • 박대원 (서울과학기술대학교 에너지환경대학원)
  • Moon, Kwangseok (Graduate School of energy and Environment, Seoul National University of Technology & Science) ;
  • Kim, Jaehyung (Graduate School of energy and Environment, Seoul National University of Technology & Science) ;
  • Koo, Hyemin (Graduate School of energy and Environment, Seoul National University of Technology & Science) ;
  • Lim, Junhyuk (Graduate School of energy and Environment, Seoul National University of Technology & Science) ;
  • Kim, Nakjoo (Graduate School of energy and Environment, Seoul National University of Technology & Science) ;
  • Chang, Wonseok (District Heating Technology Research Institute, Korea District Heating Corp.) ;
  • Pak, Daewon (Graduate School of energy and Environment, Seoul National University of Technology & Science)
  • 투고 : 2014.08.02
  • 심사 : 2014.09.12
  • 발행 : 2014.09.30
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초록

본 연구에서는 매립가스 증대를 위한 음폐수의 원활한 주입을 위해 혐기성 산발효 전처리를 수행하였으며 이를 통해 점도 감소와 유기산 생산량을 확인하여 매립지 주입을 위한 최적조건을 확인하고자 하였다. 산발효 후 음폐수 가용화율은 약 15% 증가함을 보였고 체류시간의 변화와 반응기형태를 달리 한 결과 큰 차이를 보이지는 않았다. 반응기형태에 따라 점도변화를 확인한 결과 상향류식 반응기에서 $76.95{\pm}3.27%$로 완전혼합반응기에 비해 약 11.38% 높은 점도 저감효율을 보였으며, VFA생산에서는 체류시간을 3일에서 5일로 증가 시 2.01배(상향류식 반응기), 1.76배(완전혼합반응기) 높은 경향을 보였다. 이는 상향류식 반응기의 경우 고정층담체의 스크린 역할로 분자량이 작은 물질에 비해 큰 물질들이 상대적으로 반응기에 체류하는 시간이 길어져 효율이 높은 것으로 사료된다.

In order to increase landfill gas (LFG) production with food waste leachate, this study was confirmed to be acidogenetic conditions for landfill site injection. Thereby, it was conducted for acidogenetic treatments to determine the decrease in viscosity and VFA production. After acidogenesis treatments, solubility of food waste leachate increased approximately 15%, and as a result, UASB and CSTR were similar by reactor type using the change of retention time. Based on the result of the change in viscosity by reactor type, efficiency of UASB showed approximately 11.38% of higher decrease in viscosity as $76.95{\pm}3.27%$ vs. CSTR. Also, VFA production showed the higher increase of 2.01 times (UASB) and 1.76 times (CSTR) respectively at the point of increasing retention time from 3 to 5 days. From the above results, efficiency of UASB in a reactor was relatively higher because large molecular lead to longer retention time than small molecular due to having screen effect in the fixed media.

키워드

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