New & Renewable Energy (신재생에너지)

Korean Society for New and Renewable Energy (한국신·재생에너지학회)
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Municipal Solid Waste-derived Syngas Fermentation Process by Pressurization

가압을 통한 도시형 생활 폐기물 기반 합성가스발효 공정 개발

  • Subin Shin (Gwangju Clean Energy Research Center, Korea Institute of Energy Research) ;
  • Jae Hee Go (Gwangju Clean Energy Research Center, Korea Institute of Energy Research) ;
  • Myounghoon Moon (Research Center for Innovative Energy and Carbon Optimized Synthesis for Chemicals (Inn-ECOSysChem), Gwangju Institute of Science and Technology) ;
  • Min-Sik Kim (Bioenergy and Resources Upcycling Research Laboratory, Korea, Institute of Energy Reserach) ;
  • Mungyu Lee (Research Center for Innovative Energy and Carbon Optimized Synthesis for Chemicals (Inn-ECOSysChem), Gwangju Institute of Science and Technology) ;
  • In Seop Chang (Research Center for Innovative Energy and Carbon Optimized Synthesis for Chemicals (Inn-ECOSysChem), Gwangju Institute of Science and Technology) ;
  • Seongsoo Son (CMC department PI Team, Kobiolabs) ;
  • Gwon Woo Park (Research Center for Innovative Energy and Carbon Optimized Synthesis for Chemicals (Inn-ECOSysChem), Gwangju Institute of Science and Technology)
  • Received : 2023.10.11
  • Accepted : 2023.12.12
  • Published : 2023.12.25
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Abstract

Global efforts are focused on achieving carbon neutrality due to the increases in the levels of greenhouse gases. Moreover, the greenhouse gases generated from the disposal of municipal solid waste (MSW) are the primary sources of emissions in South Korea. In this study, we conducted the biological conversion of syngas (CO, H2, and CO2) generated from MSW gasification. The MSW-derived syngas was used as a feed source for cultivating Eubacterium limosum KIST612, and pressurization was employed to enhance gas solubility in culture broth. However, the pH of the medium decreased owing to the pressurization because of the CO2 in the syngas and the cultivation-associated organic acid production. The replacement of conventional HEPES buffer with a phosphate buffer led to an approximately 2.5-fold increase in acetic acid concentration. Furthermore, compared with the control group, the pressurized reactor exhibited a maximum 8.28-fold increase in the CO consumption rate and a 3.8-fold increase in the H2 consumption rate.

Keywords

Acknowledgement

본 연구는 2021년도 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구입니다(No. 2021R1A5A1028138).

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