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Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae
Published on: July 10, 2015
Nitrate repletion strategy for enhancing lipid production from marine microalga Tetraselmis sp
Garam Kim1, Jinsung Bae1, Kisay Lee1
1Department of Environmental Engineering and Energy, Myongji University, Yongin 449-728, Republic of Korea.
Abstract:
The cell growth rate and cellular lipid content of microalgae are affected by the nitrogen levels during cultivation. The growth rate and lipid content of marine microalga Tetraselmis sp. was found to increase under nitrate replete conditions, but not under deplete conditions. Thus, in order to enhance the lipid productivity of Tetraselmis sp., a two-stage culture process utilizing nitrate replete condition was applied. When the cells were cultivated in F/2 medium for five days in the first stage, the obtained lipid content and productivity were 22.4% and 26.7mgL(-1)d(-1), respectively. After second stage of cultivation for a further 36h under nitrate replete conditions with 8.82mM NaNO3, increased biomass concentration of 1.32gL(-1) and lipid content of 30.5% were obtained, with an enhanced lipid productivity of 47.3mgL(-1)d(-1).
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