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Author(s): Teresa M. Mata
Janaína Santos
Adélio M. Mendes
Nídia S. Caetano
António A. Martins
Title: Sustainability evaluation of biodiesel produced from microalgae chlamydomonas sp grown in brewery wastewater
Issue Date: 2014
Abstract: This study performs a sustainability evaluation of biodiesel from microalga Chlamydomonas sp. grown in20 % (v/v) of brewery's wastewater, blended with pentose sugars (xylose, arabinose or ribose resultingfrom the hydrolysis of brewer's spent grains (BSG). The life cycle steps considered for the study are:microalgae cultivation, biomass processing and lipids extraction at the brewery site, and its conversion tobiodiesel at a dedicated external biofuel's plant. Three sustainability indicators (LCEE, FER and GW) wereconsidered and calculated using experimental data. Literature data was used, whenever necessary, tocomplement life cycle data, thus allowing a more accurate sustainability evaluation. A comparativeanalysis of the biodiesel life cycle steps was also conducted, with the main goal of identifying which stepsneed to be improved. Results show that biomass processing, especially cell harvesting, microalgaecultivation, and lipids extraction are the main process bottlenecks. It is also analysed the influence on themicroalgae biodiesel sustainability of adding each pentose sugar to the cultivation media, concluding that itstrongly influences the biomass and lipid productivity. In particular, the addition of xylose is preferable interms of lipid productivity, but from a sustainability point of view, ribose is the best, though the differencefrom xylose is not significant. Nevertheless, culture without pentose addition presents the bestsustainability results.
Subject: Engenharia química, Engenharia química
Chemical engineering, Chemical engineering
Scientific areas: Ciências da engenharia e tecnologias::Engenharia química
Engineering and technology::Chemical engineering
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/PEst-C/EQB/UI0511/2013/PROJECTO ESTRATÉGICO - UI 511 - 2013-2014/UI0511
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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