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가압을 통한 도시형 생활 폐기물 기반 합성가스발효 공정 개발
신수빈(Subin Shin),고재희(Jae Hee Go),문명훈(Myounghoon Moon),김민식(Min-Sik Kim),이문규(Mungyu Lee),장인섭(In Seop Chang),손성수(Seongsoo Son),박권우(Gwon Woo Park) 한국신재생에너지학회 2023 신재생에너지 Vol.19 No.4
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.