Title: Aspects of carbon dioxide mitigation in a closed microalgae photo-bioreactor supplied with flue gas

Authors: Eyal Kurzbaum; Anat Aharoni; Felix Kirzhner; Yossi Azov; Thomas Friedl; Robert Armon

Addresses: Shamir Research Institute, University of Haifa, P.O. Box 97, Qatzrin 12900, Israel ' Department of Civil and Environmental Engineering, Technion, Haifa, 32000, Israel ' Deceased; formerly of Department of Civil and Environmental Engineering, Israel ' Department of Civil and Environmental Engineering, Technion, Haifa, 32000, Israel ' Department Experimental Phycology and Culture Collection of Algae (EPSAG), Georg-August-University Goettingen, Nikolausberger Weg 18, 37073, Goettingen, Germany ' Department of Civil and Environmental Engineering, Technion, Haifa, 32000, Israel

Abstract: The aim of the present study is to investigate the potential of flue gases to be efficiently and economically applied in production of algal biomass in a photobioreactor (PBR). Various microalgae strains (Chlorella sorokiniana 211-234, Bracteacoccus minor 61.80, Radiosphaera negevensis 87.80, Chlorosarcinopsis negevensis 67.80 and Chlorococcum novae-angliae 5.85) had been tested for CO2 mitigation, growth and tolerance to high CO2 levels. The flue gas and CO2 bubbling induced a significant algal mass growth compared to control (ambient air). Removal of CO2 and NO by the studied microalgae strains was found to be 44% and 33% along daily intervals, respectively. A growth rate of ~0.4g L−1 d−1 was obtained for all algal species tested. Growth conditions for tested algae can be optimised through PBR technology in order to obtain highest biomass yield for production of valuable biochemicals (i.e., low-cost biofuel).

Keywords: carbon dioxide; flue gas; photobioreactor; PBR; microalgae; biomitigation; algae; NO; growth rate.

DOI: 10.1504/IJEP.2017.088168

International Journal of Environment and Pollution, 2017 Vol.62 No.1, pp.1 - 16

Available online: 23 Nov 2017 *

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