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Apparatus and method for controlling autotroph cultivation

United States Patent

8,478,444
July 2, 2013
View the Complete Patent at the US Patent & Trademark Office
A method includes receiving at least one measurement of a dissolved carbon dioxide concentration of a mixture of fluid containing an autotrophic organism. The method also includes determining an adjustment to one or more manipulated variables using the at least one measurement. The method further includes generating one or more signals to modify the one or more manipulated variables based on the determined adjustment. The one or more manipulated variables could include a carbon dioxide flow rate, an air flow rate, a water temperature, and an agitation level for the mixture. At least one model relates the dissolved carbon dioxide concentration to one or more manipulated variables, and the adjustment could be determined by using the at least one model to drive the dissolved carbon dioxide concentration to at least one target that optimize a goal function. The goal function could be to optimize biomass growth rate, nutrient removal and/or lipid production.
Fuxman; Adrian M. (North Vancouver, CA), Tixier; Sebastien (North Vancouver, CA), Stewart; Gregory E. (North Vancouver, CA), Haran; Frank M. (North Vancouver, CA), Backstrom; Johan U. (North Vancouver, CA), Gerbrandt; Kelsey (Burnaby, CA)
Honeywell ASCa Inc. (Mississauga, Ontario, CA)
12/ 985,061
January 5, 2011
GOVERNMENT LICENSE RIGHTS This invention was made with government support under contract DEFC2610FE0002568 from the United States Department of Energy. The government has certain rights in the invention