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폴리비닐클로라이드 해양광생물반응기와 고밀도 폴리에틸렌 해양광생물반응기에서 미세조류, Tetraselmis sp. KCTC12236BP의 생산성 비교
정성균(Seung-Gyun Jung),김수권(Su-Kwon Kim),변문섭(Moon-Sup Bun),조용희(Yonghee Cho),신동우(Dong-Woo Shin),김지훈(Z-Hun Kim),임상민(Sang-Min Lim),이철균(Choul-Gyun Lee) 한국해양바이오학회 2016 한국해양바이오학회지 Vol.8 No.1
It is important to design photobioreactor by cheap material for economical microalgal biomass production. In this study, two types of marine photobioreactors (MPBR), made by either polyvinyl chloride (MPBR-PVC) or high density poly ethylene (MPBR-HDPE), are used and performance of these were compared. Tetraselmis sp. KCTC 12236BP is a green marine alga that isolated from Ganghwa Island, Korea, and the strain was used for marine cultivations using MPBR-PVC and MPBR-HDPE. The cultivations were performed three times in the spring season of 2012 using MPBR-PVC and of 2013 using MPBR-HDPE in the coastal area of Young Heung Island. As the results, MPBR-PVC shows higher biomass productivities than MPBR-HDPE, due to its high light transmittance. In the cultivations using MPBR-PVC, the average sea water temperature was 11.5°C during the first experiment and 16.5°C during the second and third experiments. Average light intensities during three times for experiments were 407.5, 268.1 and 273.0 μ·E·m<SUP>-2</SUP>·s<SUP>-1</SUP>, respectively. The maximum fresh cell weight and average biomass productivity were 1.2 g·L<SUP>-1</SUP> and 0.12 g·L<SUP>-1</SUP>·day<SUP>-1</SUP>. These results showed that Tetraselmis sp. KCTC12236BP were adapted well with the environmental conditions from ocean, and grow in the MPBR-PVC and MPBR-HDPE.
Dunaliella tertiolecta LB999 유래 바이오디젤의 산화특성 연구
이돈민,이미은,하종한,류영진,최창용,심상혁,임상민,이철균,이봉희,Lee, Don-Min,Lee, Mi-Eun,Ha, Jong-Han,Ryu, Jin-Young,Choi, Chang-Yong,Shim, Sang-Hyuk,Lim, Sang-Min,Lee, Choul-Gyun,Lee, Bong-Hee 한국해양바이오학회 2015 한국해양바이오학회지 Vol.7 No.1
Bio diesel has advantages to reduce GHG(Greenhouse Gas) compare with the fossil fuel by using oil comes from plant/animal sources and even waste such as used cook oil. The diversity of energy feeds brings the positive effects to secure the national energy mix. In this circumstance, micro-algae is one of the prospective source, though some technical barriers. We analyzed the bio diesel which was derived from Dunaliella tertiolecta LB999 through the BD100 quality specifications designated by the law. From that result, it is revealed that the oxidation stability is one of the properties to be improved. In order to find the reason for low oxidation stability, we analyzed the oxidation tendency of each FAME components through some methods(EN 14111, EN14112, EN16091). In this study, we could find the higher double bond FAME portion, the more oxidative property(C18:1<C18:2${\ll}C18:3$) in bio diesel and main unsaturated FAME group is acted as the key component deciding the bio diesel's oxidation stability. It is proved experimentally that C18:3 FAME are oxidized easily under the modified accelerated oxidation test. We also figure out low molecular weight hydrocarbon and FAME were founded as a result of thermal degradation. Some alcohol and aldehydes were also made by FAME oxidation. In conclusion, it is necessary to find the way to improve the micro-algal bio diesel's oxidation stability.