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Impact of low temperature pretreatment on the anaerobic digestion of microalgal biomass
Passos, Fabiana Lopes del Rei; García Serrano, Joan; Ferrer Martí, Ivet
Universitat Politècnica de Catalunya. Departament d'Enginyeria Hidràulica, Marítima i Ambiental; Universitat Politècnica de Catalunya. GEMMA - Grup d'Enginyeria i Microbiologia del Medi Ambient
The aim of this study was to investigate the effect of low temperature pretreatment on the anaerobic digestion of microalgal biomass grown in wastewater. To this end, microalgae were pretreated at low temperatures (55, 75 and 95 °C) for 5, 10 and 15 h. Biomass solubilisation was enhanced with the pretreatment temperature and exposure time up to 10 h. The methane yield was improved by 14%, 53% and 62% at 55, 75 and 95 °C, respectively; and was correlated with the solubilisation increase. The pretreatment at 95 °C for 10 h increased VS solubilisation by 1188%, the initial methane production rate by 90% and final methane yield by 60% compared to untreated microalgae. With diluted biomass (∼1% VS) positive energy balance was not likely to be attained. However, with concentrated biomass (>2% VS) energy requirements may be covered and even surplus energy generated.
Àrees temàtiques de la UPC::Energies::Recursos energètics renovables::Biogàs
Àrees temàtiques de la UPC::Energies::Recursos energètics renovables::Biocombustibles
Biogas.
Biomass energy.
Microbial fuel cells
Waste products as fuel.
Biomass
Algae
Anaerobic digestion
Biofuels
Biogas
Methane
Microorganisms
Solubility
Temperature
Wastewater
Algues -- Biotecnologia
Biogàs
Biocombustibles
Microbiologia industrial
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
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