- Volume 6 Issue 2
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Effects of nitrogen and organic carbon sources on growth and lipid production of Chlorella sp. KR-1 in flask cultures
플라스크 배양에서 Chlorella sp. KR-1의 균체 성장 및 지질 생산에 대한 질소원 및 유기탄소원의 영향
- Received : 2015.01.02
- Accepted : 2015.01.13
- Published : 2014.12.31
Recently microalgae have been proposed as a promising biodiesel feedstock, owing to their higher lipid productivity and non-arable land based cultivation system. Biomass and lipid productivities of microalgae are largely affected by various environmental and nutritional factors. In this study, the effects of nitrogen (nitrate and ammonium) and organic carbon (glucose and glycerol) sources on the cell growth and lipid production of Chlorella sp. KR-1 were examined in flask cultures. Under autotrophic culture conditions for 15 days, overall cell growth and lipid (fatty acid methyl ester, FAME) production with nitrate were better than those of ammonium, resulting in 1.06 g cell/L and 333 mg FAME/L, respectively. Maximal intracellular lipid contents (348 - 352 mg FAME/g cell) were observed at low concentrations of 1 mM for both nitrate and ammonium. In the supply of light, addition of glucose in the range of 1 - 20 g/L showed higher cell densities than the autotrophic cell growth condition. Higher lipid accumulation of 375 mg FAME/g cell could achieved at 5 g glucose/L albeit of relatively short incubation of 7 days. With glycerol, intracellular lipid contents were ~1.9 times lower than glucose cases although similar cell growths were observed for both carbon sources.
Microalgae;Chlorella;cell growth;lipid;nitrogen source;carbon source
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Grant : 미세조류를 이용한 이산화탄소의 고부가가치 상품 전환 공정의 실증
Supported by : 한국에너지기술평가원