Počet záznamů: 1

Experimental validation of a nonequilibrium model of CO2 fluxes between gas, liquid medium, and algae in a flat-panel photobioreactor

  1. 1.
    0359491 - UEK-B 2012 RIV DE eng J - Článek v odborném periodiku
    Nedbal, Ladislav - Červený, Jan - Keren, N. - Kaplan, A.
    Experimental validation of a nonequilibrium model of CO2 fluxes between gas, liquid medium, and algae in a flat-panel photobioreactor.
    Journal of Industrial Microbiology & Biotechnology. Roč. 37, č. 12 (2010), s. 1319-1326 ISSN 1367-5435
    Grant CEP: GA ČR GA206/09/1284
    Výzkumný záměr: CEZ:AV0Z60870520
    Klíčová slova: algae * carbon dioxide * cyanobacteria * mathematical model * photosynthesis
    Kód oboru RIV: EH - Ekologie - společenstva
    Impakt faktor: 2.416, rok: 2010
    http://www.springerlink.com/content/a2133tn14581366g/

    Carbon dioxide (CO2) availability strongly affects the productivity of algal photobioreactors, where it is dynamically exchanged between different compartments, phases, and chemical forms. To understand the underlying processes, we constructed a nonequilibrium mathematical model of CO2 dynamics in a flat-panel algal photobioreactor. The model includes mass transfer to the algal suspension from a stream of bubbles of CO2-enriched air and from the photobioreactor headspace. Also included are the hydration of dissolved CO2 to bicarbonate ion (HCO (3) (-) ) as well as uptake and/or cycling of these two chemical forms by the cells. The model was validated in experiments using a laboratory-scale flat-panel photobioreactor that controls light, temperature, and pH and where the concentration of dissolved CO2, and partial pressure of CO2 in the photobioreactor exhaust are measured. First, the model prediction was compared with measured CO2 dynamics that occurred in response to a stepwise change in the CO2 partial pressure in the gas sparger. Furthermore, the model was used to predict CO2 dynamics in photobioreactors with unicellular, nitrogen-fixing cyanobacterium Cyanothece sp. The metabolism changes dramatically during a day, and the distribution of CO2 is expected to exhibit a pronounced diurnal modulation that significantly deviates from chemical equilibrium.
    Trvalý link: http://hdl.handle.net/11104/0197272