Abstract
ABSTRACTNaHCO3 was used to increase the concentration of dissolved inorganic carbon (DIC) for autotrophic microalgal cultivation in open pond systems. The effects of DIC on the growth of Chlorella vulgaris were investigated under different initial DIC concentrations of 17, 33, 62, 123, and 361 mg carbon/L under no mixing condition. NaHCO3 was found to be an excellent buffer that can help increase DIC concentrations in the culture medium for open pond systems with an advantage of keeping the pH of the medium suitable for algal culture. The cell growth did not show any significant differences with respect to DIC concentrations available in the culture media under no mixing condition. A mass balance model for DIC shows that the external mass transfer resistance between the bulk culture media and the algal cell surface is not significant. The DIC consumption rate inside the algal cell is very likely to be a rate‐limiting step for the growth. Copyright © 2014 Curtin University of Technology and John Wiley & Sons, Ltd.
Published Version
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