Microalgae are an attractive biofuel feedstock because of their high lipid to biomass ratios, lipid compositions
that are suitable for biodiesel production, and the ability to grow on varied carbon sources. While
algae can grow autotrophically, supplying an exogenous carbon source can increase growth rates and
allow heterotrophic growth in the absence of light. Time course analyses of dextrose-supplemented Chlorella
vulgaris batch cultures demonstrate that light availability directly influences growth rate, chlorophyll
production, and total lipid accumulation. Parallel photomixotrophic and heterotrophic cultures
grown to stationary phase reached the same amount of biomass, but total lipid content was higher for
algae grown in the presence of light (an average of 1.90 mg/mL vs. 0.77 mg/mL over 5 days of stationary
phase growth).
Microalgae are an attractive biofuel feedstock because of their high lipid to biomass ratios, lipid compositionsthat are suitable for biodiesel production, and the ability to grow on varied carbon sources. Whilealgae can grow autotrophically, supplying an exogenous carbon source can increase growth rates andallow heterotrophic growth in the absence of light. Time course analyses of dextrose-supplemented Chlorellavulgaris batch cultures demonstrate that light availability directly influences growth rate, chlorophyllproduction, and total lipid accumulation. Parallel photomixotrophic and heterotrophic culturesgrown to stationary phase reached the same amount of biomass, but total lipid content was higher foralgae grown in the presence of light (an average of 1.90 mg/mL vs. 0.77 mg/mL over 5 days of stationaryphase growth).
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Microalgae are an attractive biofuel feedstock because of their high lipid to biomass ratios, lipid compositions
that are suitable for biodiesel production, and the ability to grow on varied carbon sources. While
algae can grow autotrophically, supplying an exogenous carbon source can increase growth rates and
allow heterotrophic growth in the absence of light. Time course analyses of dextrose-supplemented Chlorella
vulgaris batch cultures demonstrate that light availability directly influences growth rate, chlorophyll
production, and total lipid accumulation. Parallel photomixotrophic and heterotrophic cultures
grown to stationary phase reached the same amount of biomass, but total lipid content was higher for
algae grown in the presence of light (an average of 1.90 mg/mL vs. 0.77 mg/mL over 5 days of stationary
phase growth).
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