Life cycle assessment of biofuels from an integrated Brazilian algae-sugarcane biorefinery

Autor(es)

Souza, Simone P. ^{[1, 2, 3]} ; Gopal, Anand R. ^[2] ; Seabra, Joaquim E. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Fac Engn Mecan, BR-13083860 Campinas, SP - Brazil

^[2] Univ Calif Berkeley, Environm Energy Technol Div, Berkeley, CA 94720 - USA

^[3] CNPEM ABTLuS, Brazilian Bioethanol Sci & Technol Lab CTBE, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ENERGY; v. 81, p. 373-381, MAR 1 2015.
• Citações Web of Science: 20

Resumo

Sugarcane ethanol biorefineries in Brazil produce carbon dioxide, electricity and heat as byproducts. These are essential inputs for algae biodiesel production. In this paper, we assessed ethanol's life cycle greenhouse gas emissions and fossil energy use produced in an integrated sugarcane and algae biorefinery where biodiesel replaces petroleum diesel for all agricultural operations. Carbon dioxide from cane juice fermentation is used as the carbon source for algae cultivation, and sugarcane bagasse is the sole source of energy for the entire facility. Glycerin produced from the biodiesel plant is consumed by algae during the mixotrophic growth phase. We assessed the uncertainties through a detailed Monte-Carlo analysis. We found that this integrated system can improve both the life cycle greenhouse gas emissions and the fossil energy use of sugarcane ethanol by around 10% and 50%, respectively, compared to a traditional Brazilian sugarcane ethanol distillery. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 12/19157-4 - Uso de algas para mitigação das emissões de CO2 no Setor Sucroenergético através de um novo modelo de biorrefinaria
• Beneficiário: Simone Pereira de Souza
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 11/13514-7 - Avaliação de aspectos econômicos e ambientais da produção integrada de bioenergia e alimentos
• Beneficiário: Joaquim Eugênio Abel Seabra
• Modalidade de apoio: Auxílio à Pesquisa - Regular