Abstract: Enhancing growth of algae in an algaculture facility includes contacting a growth medium with a gas including carbon dioxide, transferring some of the carbon dioxide to the growth medium to yield an enriched growth medium, and providing the enriched growth medium to the algaculture facility. The concentration of dissolved carbon dioxide in the enriched growth medium exceeds the concentration of dissolved carbon dioxide in the growth medium, where dissolved carbon dioxide includes ions formed by the reaction of carbon dioxide with a species in solution. The growth medium may be obtained from the algaculture facility, and may be filtered or otherwise processed before or after contacting the growth medium with the gas. Providing the enriched growth medium to the algaculture facility increases the concentration of dissolved carbon dioxide in the bulk growth medium of the algaculture facility.

Abstract: Capturing a target gas includes contacting a gas mixture including a target species with an aqueous solution including a buffer species, and transferring some of the target species from the gas mixture to the aqueous solution. The target species forms a dissolved target species in the aqueous solution, and the aqueous solution is processed to yield a first aqueous stream and a second aqueous stream, where the equilibrium partial pressure of the target species over the second aqueous stream exceeds the equilibrium partial pressure of the target species over the first aqueous stream. At least some of the dissolved target species in the second aqueous stream is converted to the target species, and the target species is liberated from the second aqueous stream. The target species can be collected and/or compressed for subsequent processing or use.

Abstract: Capturing a target gas includes contacting a gas mixture including a target species with an aqueous solution including a buffer species, and transferring some of the target species from the gas mixture to the aqueous solution. The target species forms a dissolved target species in the aqueous solution, and the aqueous solution is processed to yield a first aqueous stream and a second aqueous stream, where the equilibrium partial pressure of the target species over the second aqueous stream exceeds the equilibrium partial pressure of the target species over the first aqueous stream. At least some of the dissolved target species in the second aqueous stream is converted to the target species, and the target species is liberated from the second aqueous stream. The target species can be collected and/or compressed for subsequent processing or use.