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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/17073

Title: Microalgae Versus Land Crops as Feedstock for Biodiesel: Productivity, Quality, and Standard Compliance
Other Titles: BioEnergy Research
Authors: Nascimento, Iracema Andrade
Marques, Sheyla Santa Izabel
Cabanelas, Iago Teles Dominguez
Carvalho, Gilson Correia de
Nascimento, Maurício Andrade
Souza, Carolina Oliveira de
Druzian, Janice Izabel
Hussain, Javid
Liao, Wei
Keywords: Microalgae oil yields;Microalgae-based biodiesel;Biodiesel fuel quality;Biodiesel productivity;Biodiesel feedstock selection
Issue Date: 2014
Abstract: Despite certain environmental advantages over fossil diesel, land crop-derived biodiesels may not satisfy the increasing worldwide demand for transportation fuels. As an abundant photosynthesizer, algae could be an adequate surrogate for biodiesel production. Nevertheless, high production costs, scarce selected species, and inaccurate assumptions about production yields represent industrial uncertainties. In this study, a reliable approach to analyzing algal biodiesel production has been developed based on species-to-species variations in oil productivity and quality. This approach compares biodiesels from Chlorophyta strains with land crop feedstock according to (i) potential yields, (ii) oil quality, and (iii) compliance with biodiesel quality standards. Algal yields were assessed by (i) extrapolating the strain-specific laboratory results to commercial-scale growth systems; (ii) converting volumetric to areal biomass productivity; and (iii) estimating oil yields for each strain, as the product of their projected areal biomass productivity for each growth system, and the oil percentage in biomass as determined in the laboratory. Biodiesel fuel properties were estimated by using fatty acid methyl ester profile predictive models. The Chlorophyta strains in this study provided annual oil yields that were generally higher than those of land crops by one order of magnitude. Six strains yielding more than 40 mg oil l−1 day−1 were identified as adequate for sustaining biodiesel production. Trebouxiophyceae algae were the most productive. Critical biodiesel parameters from both feedstock types suggest that most microalgae-derived biodiesels meet international fuel quality standards with better values than those of land crops. Because some of the highly productive feedstock does not simultaneously meet all the standards for a high quality biodiesel, optimization solutions are discussed.
Description: Texto completo: acesso restrito. p.1002-1013
URI: http://repositorio.ufba.br/ri/handle/ri/17073
ISSN: 1939-1234
Appears in Collections:Artigos Publicados em Periódicos (LABIOMAR)

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