Growing microalga Neochloris oleoabundans in rocking and floating plastic bag photobioreactors
Markov, S. A.; Childs, S.; Averitt, J. K.; Johansen, R. A.
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This paper evaluated and compared the relative microalgal biomass accumulation of rocking, floating, and stationary bag photobioreactors. Microalga Neochloris oleoabundans was grown in these photobioreactors in batch mode for 24 days under illumination. The 50 L plastic bags (cell suspension volume 25 L) were placed on the surface of a rocking platform, an artificial pond or a stationary platform. In the pond, waves were generated by electrical fans which shake and mix microalgal cells within the plastic bags. The bags were supplied with 5% CO2 in air under elevated pressure inside of the bags. The rocking bag method significantly increased biomass yields to approximately 3-4 g * L-1, as compared to 0.16 g * L-1 in the floating photobioreactor and only 0.03 g * L-1 in the stationary type photobioreactor.
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