Effect of CO2 enhancement in an outdoor algal production system usingTetraselmis |
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Authors: | Miguel Olaizola Eirik O Duerr Donald W Freeman |
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Institution: | 1. Marine Sciences Research Center, State University of New York at Stony Brook, Stony Brook, NY, 11794-5000, USA 2. The Oceanic Institute, Makapuu Point, P.O. Box 25280, Honolulu, HZ, 96825, USA 3. USDA-ARS, Aquaculture Project, Route 2, Box 481, Tishomingo, OK, 73460, USA
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Abstract: | One of the objectives of microalgal culture is to provide reliable production technology for important live aquaculture feed organisms. Presented here are the results of experiments designed to provide a better understanding of the relationship between inorganic carbon availability and algal production.Our results suggest that through additions of CO2 gas we were able to maintain sufficient dissolved carbon to stabilize outdoor algal cultures. Increases in the rate of addition of CO2 increased levels of dissolved CO2, total dissolved inorganic carbon ( CO2), and decreased pH in the growth medium. This translated into improved buffering capacity of the culture medium and higher growth rate. A minimum of 2.4 mM CO2 was found necessary to maintain a maximal growth rate of 0.7 doublings/day. We also found that the increased productivity more than offsets the cost of adding the CO2. |
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Keywords: | algal biomass CO2 gas outdoor algal cultures Tetraselmis |
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