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Chlorella vulgaris cultivation with an additive of magnesium-aminoclay
- Farooq, Wasif, Lee, Hyun Uk, Huh, Yun Suk, Lee, Young-Chul
- Algal research 2016 v.17 pp. 211-216
- Chlorella vulgaris, biodiesel, carbon dioxide, fuel production, harvesting, lipid content, lipids, microalgae, oils, reactive oxygen species
- In integral microalgal biofuel production consisting of microalgal culturing, harvesting, lipid (oil) extraction, oil-to-biodiesel conversion and biodiesel quality improvement, cultivation to improve lipid (oil) content in microalgal cells without inducement of transformants is a booming field of experimentation and application. In the present study, water-solubilized, transparent and cationic-charged and clustered magnesium-aminoclay (MgAC) was utilized as a co-additive in Chlorella vulgaris cultivation. The MgAC effected both an increase of cell size (from ~3.524μm to ~4.175μm size) with low cell density (from 1260×106cells/mL to 511×106cells/mL) and an increase of total lipid content without microalgal cell transformation according to various MgAC loadings (0, 0.25, 0.50, and 1.0g/L) at the 2.0% CO2 supply. The cationic-charged MgAC clusters wrapped the microalgal cells to create a stressful microenvironment, increasing the intracellular reactive oxygen species (ROS) content. Therefore, additive-MgAC-based microalgal cultivation is herein suggested in a novel microalgal biofuel production.