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상병인 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Hydrogenotrophicmethanogens can use gaseous substrates like H2 and CO2 in methane production. We successfully have operateda novel hollow-fiber membrane biofilm reactor (Hf-MBfR) for stable methane production from H2 and CO2 undercontinuous operation. H2 and CO2 were diffused into waterthrough the membrane without bubbles formation in theHf-MBfR operated at pH 4.5~5.5 over 70 days. Focusing on the presence of hydrogenotrophic methanogens, we analyzedthestructure of the microbial community in the reactor. Denaturinggradient gel electrophoresis was done with bacterial and archaeal 16S rDNAprimers. Real-time qPCRwas performed to check the variance in the methanogens according to the operation time. Finally, the microbial community at a condition with maximum methane production were analyzed by pyrosequencing methods. The results showed that acidicoperation of a methane production reactor without any pH adjustment inhibitedacetogenic growth and enriched the hydrogenotrophic methanogens, decreasing thegrowth of acetoclastic methanogens.
Biorefinery from carboxylic acids
상병인,전병승,신승진,김현진 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Volatile fatty acids have various applications, such as microbial nitrogen removal, the production of biofuels, the generation of electricity using microbial fuel cells, the synthesis of biosurfactants and biopolymers, and usages in the food, textile, pharmaceutical, leather, and plastics industries. It can be classified into short-chain fatty acids, such as acetic acid, propionic acid, and butyric acid, and medium-chain fatty acids with chains of 5 ~ 8 carbons (pentanoic acid, hexanoic acid, heptanoic acid, and octanoic acid), which are produced through the reverse □ -oxidation pathways. In this presentation, the different applications of carboxylic acids and their current and future production status are highlighted, with an emphasis on the biofuels and bio-chemicals industry.
상병인 한국환경농학회 2012 한국환경농학회 워크샵자료 Vol.2012 No.1
Volatility of oil prices along with major concerns about climate change, oil supply security and depleting reserves have sparked renewed interest in the production of fuels from renewable resources. Recent advances in green catalysts and system biology provide new tools for researchers and engineers to direct their strategies and construct optimal chemical and bio-based catalysts for the sustainable production of biofuels and biochemicals. To get the qualified vehicle fuels from the biological ways, the carbon number of the fuels should be increased. Bio-butanol having four carbons is one of the most promising biofuels due to its gasoline-like properties and the wide variety of its feedstock. However there is an antinomy that increasing carbon number in the biofuels provides better fuel characteristics but is more toxic to the fuel-producing microorganisms during fermentation. It is the fatal drawback of butanol or higher carbon-chained alcohols as the competitive biofuel with ethanol as the economical value aspect. To overcome the fatal drawback, carboxylic acids as the precursors of higher carbon-chained alcohols could be produced up to the similar concentration level with ethanol from the fermentation and could be converted to the higher carbon-chained alcohols by the chemical catalytic reaction, such as hydrogenation, etherification, esterification, etc. This is our novel idea to produce the biofuels containing higher carbon numbers using the integrated biological process with the chemical catalytic reaction.
재생에너지 3020 정책과 Power to Gas 기술
상병인 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
정부는 에너지전환 시대에 부응하기 위해 2017년 9월 많은 국민들의 주요 관심사항인 미세먼지를 획기적으로 감소시키기 위한 대책으로 노후석탄 발전소의 조기 폐지, 석탄발전의 LNG 전환 추진 등을 통해 국내 배출원에서 발생하는 미세먼지 발생량의 30% 이상을 감축할 것을 예고하였다. 이러한 신정부 에너지정책의 기본 방향인 에너지전환로드맵을 2017년 10월에 확정하여 원전의 단계적 감축 및 재생에너지를 2030년 국내 전체 발전량의 20%까지 확대하려는 정부 정책을 추진하고 있다. 그러나 재생에너지에서 생산되는 재생발전 전력은 계정과 날씨에 따라 발전량이 변동하여 전력 부하 안정성 확보 및 미활용 전력의 활용을 위한 방안 강구가 필요하다. 이러한 방안 중의 하나로 재생에너지에서 유래한 전기에너지를 가스연료 (수소, 메탄)로 전환하고 이를 이용한 에너지 믹스 그리드와 연계된 분산형 에너지 공급 시스템을 구축하려는 노력이 세계적으로 주목을 받고 있다. 따라서, 에너지 믹스 그리드의 주요 에너지원 역할이 가능할 Power to gas 기술 개발 동향에 대해 발표하고자 한다.