Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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Preliminary Evaluation of Leachate Recirculation Anaerobic Digestion System to treat Source Separated Food Waste

침출수 순환형 음식물류 폐기물 혐기성 소화공법에 대한 초기 특성 파악

  • Lee, Byonghi (Dept. of Environmental Energy Eng., Kyonggi University) ;
  • Lee, Jeseung (Dept. of Environmental Energy Eng., Kyonggi University)
  • 이병희 (경기대학교 환경에너지공학과) ;
  • 이제승 (경기대학교 환경에너지공학과)
  • Received : 2013.11.08
  • Accepted : 2013.12.06
  • Published : 2013.12.30
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Abstract

In order to generate a renewable energy-Methane, anaerobic systems fed with source separated food waste from university cafeteria were studied. At first, four reactors were evaluated with same feed components; content non-mixing anaerobic reactor without leachate withdrawal/recirculation, content mixing anaerobic reactor without leachate withdrawal/recirculation, content non-mixing anaerobic reactor with leachate withdrawal/recirculation and content mixing anaerobic reactor with leachate withdrawal/recirculation. From the first study, content non-mixing anaerobic reactor with leachate withdrawal/recirculation showed the highest gas production. From further study with this system, it was observed that leachate permeation rate within anaerobic reactor was very important factor for gas generation. The higher permeation rate, the more gas production was observed. It is assumed that 1kg of gas collector weight and C/N ration above 10 in food waste may cause gas consumption in the anaerobic reactor. The gas consumption was estimated by negative pressure build-up at gas collector. The negative pressure build-up must be explained to produce Methane from Food Waste.

교내 식당에서 분리 수거된 음식물류 폐기물에서 재생 에너지인 메탄가스를 생산하기 위해 혐기성 소화시스템에 대한 연구가 수행되었다. 1차 실험에서 침출수 인발/반송도 없고 혼합도 없는, 침출수 인발/반송은 없고 혼합이 있는, 침출수 인발/반송은 있고 혼합이 없는, 그리고 침출수 인발/반송은 있고 혼합이 있는 4개의 혐기성 시스템에서 침출수 인발/반송은 있고 혼합이 없는 시스템에서 가스발생이 가장 많은 것으로 나타났다. 반응조 혼합이 없고 침출수 인발/반송이 수행되는 시스템에서는 침출수의 반응조 내 침출수 유출속도가 빠른 경우에 혐기성 반응이 활발히 일어난 것으로 관찰되었다. 가스수집기 무게가 1kg이고 음식물류 폐기물 C/N비가 10이상이 되는 경우 혐기성 반응조의 가스가 소모되어 가스수집기에 부압이 걸리는 것이 관찰되었는데, 이에 대한 원인을 밝히는 것이 음식물류 폐기물에서 재생에너지를 회수하는데 필수적이다.

Keywords

References

  1. A. Karagiannidis and G. Perkoulidis G., "A multi-criteria ranking of different technologies for the anaerobic digestion for energy recovery of the organic fraction of municipal solid wastes", Bioresource Technology, 100(8), 2355-2360. (2009). https://doi.org/10.1016/j.biortech.2008.11.033
  2. J. Mata-Alvarez, Biomethanization of the organic fraction of municipal solid wastes, IWA Publishing, pp. 111-140. (2003).
  3. 김문환, 조시경, 오세은, "고농도 음식물류 폐기물의 연속 중온 건식혐기성소화 시 반응조 안정 성지표 및 저해현상의 모니터링", 한국도시환경학회지, 11(2), 161-167. (2011).
  4. J. Mata-Alvarez, Biomethanization of the organic fraction of municipal solid wastes, IWA Publishing, pp. 91-107. (2003).
  5. 현근우, 방명렬, 박용덕, 박정희, 임병찬, 은주영, 김영진, 최규열, 정의호, 음식물쓰레기 처리 장치의 실효성에 관한 연구, 강원보건환경연구원보, 10, 139-152. (1999).
  6. D. P. Chynoweth, G. Bosch, J. F. K. Earle, Robert Legrand and Kexin Liu, "A novel process for anaerobic composting of municipal solid waste", Applied Biochemistry and Biotechnology, 28/29(1), 421-432. (1991). https://doi.org/10.1007/BF02922622
  7. R. T. Romano, Anaerobic digestion of onion processing waste and biochemical methods for enhanced anaerobic digestion, Ph. D. dissertation, University of California. pp. 8-11. (2008).
  8. A. D. Eaton, L. S. Clesceri and A. E. Greenberg., Standard Methods for the examination of water & wastewater, 20th ed., APHA, AWWA, WEF, pp. 2-54-2-59. (1998).
  9. M. Kim, Y. Ahn and R.E. Speece, "Comparative process stability and efficiency of anaerobic digestion; mesophilic vs. thermophilic". Water Research, 36(17), 4369-4385. (2002). https://doi.org/10.1016/S0043-1354(02)00147-1
  10. D. P. Chynoweth, J. Owens, D. O'Keefe, J. F. K. Earle, G. Bosch and R. Legrand, "Sequential Batch Anaerobic Composting of the Organic Fraction of Municipal Solid Waste". Water Science & Technology, 25(7), 327-339. (1992).
  11. H. Bouallagui, M. Torrijos, J.J. Godon, R. Moletta, C. R. B. Cheikh, Y. Touhami, J.P. Delgenes, M. Hamdi, "Two-phases anaerobic digestion of fruit and vegetable wastes: bioreactors performance", Biochemical engineering journal, 21(2), 193-197. (2004). https://doi.org/10.1016/j.bej.2004.05.001
  12. J. Rapport, R. Zhang, B. M. Jenkins and R. B. Williams, Current Anaerobic Digestion Technologies Used for Treatment of Municipal Organic Solid Waste, California Integrated Waste Management Board. pp. 35-36. (2008).