현재 위치
Home
CO2 Conversion by Biotechnology Symposium : 공동개최 : CDRS (이산화탄소저감 및 처리기술개발사업단) - 좌장 : 이진석(한국에너지연구원), 심상준(성균관대)
Molecular, Physiological and Harvesting Study on the CO2 Fixing Botryococcus braunii
-
- 발행기관
- 한국생물공학회 바로가기
-
- 간행물
- 한국생물공학회 학술대회 바로가기
-
- 통권
- 2010 춘계학술대회 및 국제심포지움 (2010.04)바로가기
-
- 페이지
- pp.69-69
-
- 저자
-
- 언어
- 영어(ENG)
-
- URL
- https://www.earticle.net/Article/A119203
※ 원문제공기관과의 협약기간이 종료되어 열람이 제한될 수 있습니다.
원문정보
초록
- 영어
- Botryococcus braunii was cultivated with ambient air containing 10% CO2 and flue gas. With flue gas, the biomass and lipid productivity for B. braunii were 77 mg L-1 d-1 and 21 mg L-1 d-1, respectively, which were higher than those with 10% CO2. Oleic acid, a main component of biodiesel, occupied 55% among the fatty acids in B. braunii. The photosynthetic parameter Ik, which is the irradiance at the onset of light saturation, was relatively higher for B. braunii, meaning it could be cultivated under a high light intensity. Therefore, the present results suggest that B. braunii is appropriate for producing biodiesel, due to its high lipid content and oleic acid proportion. The specific growth rate of B. braunii reached a constant of 0.177 d-1 during
cultivation with an initial nitrate feed of 3.66 mM. The maximum lipid productivity of 19 mg L-1 d-1was achieved at 0.37 mM nitrate. Fatty acid composition changed with nitrogen concentration. Under nitrogen limitation, the fatty acid composition of the B. braunii changed with increase in oleic acid content. Oleic acid content (86 % of total fatty acids) was higher in nitrogen limited culture than in nitrogen sufficiency culture condition (69 % of total FA). Delta-9 desaturase (desC) gene encodes an ACP-desaturase involved in the synthesis of the oleic acid. The expression level of desC measured by qRT-PCR showed a 2.6-fold increase in nitrogen-limited cells than that of nitrogen-sufficient cells. This coincides with the time when the cells reached nitrogen-starvation conditions i.e., after day 4. Biodiesel containing higher concentration of oleic acid has better properties such as anti-oxidation and cold flow property. Photosynthetic capacity based on O2 evolution rate per cell or chl-a was increased with decreased nitrate concentration. The factors for harvest by flocculation of B. braunii were investigated. The most significant factors were determined as FeCl3 concentration, bioflocculant percentage, and the time for slow mixing. When the biomass of B. braunii was 1.1 g L-1, the optimum harvesting condition were 0.57 mM FeCl3, 0.87% bioflocculant, and slow mixing for 180 sec. Additionally, 10 mM CaCl2 and rapid mixing for 60 sec. were basically needed for bioflocculation.
키워드
Botryococcus braunii desaturase gene flue gas harvest저자
간행물 정보
발행기관
-
- 발행기관명
- 한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
- 설립연도
- 1984
- 분야
- 공학>생물공학
- 소개
- 이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다 1. 생물공학 분야의 발전을 위한 연구 협력 2. 생물공학의 실용화를 촉진시키기 위한 산학 협동 3. 학술연구 발표회, 강연회, 연수회 등 학술활동의 개최 4. 국,영문 학술지,소식지,학술회의 Proceedings 및 학술도서의 발간 5. 생물공학 발전을 위한 정책 건의 6. 기타 국제 교류 등 본 학회의 목적 달성을 위한 제반 활동
간행물
-
- 간행물명
- 한국생물공학회 학술대회
- 간기
- 반년간
- 수록기간
- 1985~2013
- 십진분류
- KDC 476 DDC 576
이 권호 내 다른 논문 / 한국생물공학회 학술대회 2010 춘계학술대회 및 국제심포지움
피인용수 : 0건 (자료제공 : 네이버학술정보)
함께 이용한 논문 이 논문을 다운로드한 분들이 이용한 다른 논문입니다.
출처 : 네이버학술정보
0개의 논문이 장바구니에 담겼습니다.