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Reducing electrocoagulation harvesting costs for practical microalgal biodiesel production.
Environ Technol ; 35(5-8): 691-7, 2014.
Article em En | MEDLINE | ID: mdl-24645449
Electrocoagulation has shown potential to be a primary microalgae harvesting technique for biodiesel production. However, methods to reduce energy and electrode costs are still necessary for practical application. Electrocoagulation tests were conducted on Nannochloris sp. and Dunaliella sp. using perforated aluminium and iron electrodes under various charge densities. Aluminium electrodes were shown to be more efficient than iron electrodes when harvesting both algal species. Despite the lower harvesting efficiency, however, the iron electrodes were more energy and cost efficient. Operational costs of less than $0.03/L oil were achieved when harvesting Nannochloris sp. with iron electrodes at 35% harvest efficiency, whereas aluminium electrodes cost $0.75/L oil with 42% harvesting efficiency. Increasing the harvesting efficiencies for both aluminium and iron electrodes also increased the overall cost per litre of oil, therefore lower harvesting efficiencies with lower energy inputs was recommended. Also, increasing the culturing salinity to 2 ppt sodium chloride for freshwater Nannochloris sp. was determined practical to improve the electrocoagulation energy efficiency despite a 25% reduction in cell growth.
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Biocombustíveis / Microalgas Tipo de estudo: Health_economic_evaluation Idioma: En Revista: Environ Technol Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2014 Tipo de documento: Article País de publicação: Reino Unido
Buscar no Google
Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Biocombustíveis / Microalgas Tipo de estudo: Health_economic_evaluation Idioma: En Revista: Environ Technol Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2014 Tipo de documento: Article País de publicação: Reino Unido