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Algae-Based Wastewater Treatment for Biofuel Production: Processes, Species, and Extraction Methods

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Biomass and Biofuels from Microalgae

Part of the book series: Biofuel and Biorefinery Technologies ((BBT,volume 2))

Abstract

This chapter develops the principles and rationale for an algae-based biofuel production coupled to bioremediation of municipal and agricultural wastewaters . A synergistic model for algal wastewater treatment is proposed, which addresses several economic bottlenecks to earlier algal systems and promotes value-added products, including a high-quality effluent in addition to biodiesel to improve the economic feasibility of algal biofuels . Finally, we review candidate species for full-scale algae production ponds based on algal structure, physiology and ecology , and methods for extraction of algal oils for biodiesel production and coproducts. The dominant strains of algae that are commonly found in wastewater ponds, including  Euglenia , Scenedesmus , Selenastrum , Chlorella, and  Actinastrum , are suggested as candidates for large-scale culturing based on their ability to strip nutrients and organic matter from wastewater , grow rapidly, and produce a significant level of algal oil. Oil extraction by supercritical fluid extraction (SFE) is discussed as an efficient means of isolating algal oil and other commercially important high-value compounds from algal biomass . Together with water and CO2 reclamation, such products may shift the economics of algal biomass production to allow production of low-value commodities including biodiesel and biogas.

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Acknowledgment

H. Ahmadzadeh thanks ATF Committee for the financial support.

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Lyon, S.R., Ahmadzadeh, H., Murry, M.A. (2015). Algae-Based Wastewater Treatment for Biofuel Production: Processes, Species, and Extraction Methods. In: Moheimani, N., McHenry, M., de Boer, K., Bahri, P. (eds) Biomass and Biofuels from Microalgae. Biofuel and Biorefinery Technologies, vol 2. Springer, Cham. https://doi.org/10.1007/978-3-319-16640-7_6

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  • DOI: https://doi.org/10.1007/978-3-319-16640-7_6

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