Aquatic biomass resources and carbon dioxide trapping

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Aquatic biomass resources and carbon dioxide trapping

Chelf, P; Brown, LM; Wyman, CE Biomass and Bioenergy. Vol. 4, no. 3, pp. 175-183. 1993

Abstract

Intensively managed microalgal production facilities are capable of fixing several-fold more carbon dioxide per unit area than trees or crops. Although CO sub(2) is still released when fuels derived from algal biomass are burned, integration of microalgal farms for flue gas capture approximately doubles the amount of energy produced per unit of CO sub(2) released. Materials derived from microalgal biomass also can be used for other long-term uses, serving to sequester CO sub(2). Flue gas has the potential to provide sufficient quantities of CO sub(2) for such large-scale microalgae farms. Viewing microalgae farms as a means to reduce the effects of a greenhouse gas (carbon dioxide, CO sub(2)) changes the view of the economics of the process. Instead of requiring that microalgae-derived fuel be cost competitive with fossil fuels, the process economics must be compared with those of other technologies proposed to deal with the problem of CO sub(2) pollution. However, development of alternative, environmentally safer energy production technologies will benefit society whether or not global climate change actually occurs. Microalgal biomass production has great potential to contribute to world energy supplies, and to control CO sub(2) emissions as the demand for energy increases. This technology makes productive use of arid and semi-arid lands and highly saline water, resources that are not suitable for agriculture and other biomass technologies.

Key words: Environmental Engineering; Aquatic biomass; Algal biomass; Microalgae farms; Microalgal biomass; Flue gases; Renewable energy resources; Carbon dioxide; Algae

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