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Title: Effect of pretreatments on biogas production from microalgae biomass grown in pig manure treatment plants
Authors: Martin Juarez, Judit
Riol Pastor, Elena
Fernández Sevilla, Jose María
Muñoz Torre, Raúl
García Encina, Pedro A.
Bolado Rodríguez, Silvia
Issue Date: 2018
Publisher: Elsevier
Citation: Bioresource Technology.
Abstract: Methane production from pretreated and raw mixed microalgae biomass grown in pig manure was evaluated. Acid and basic pretreatments provided the highest volatile solids solubilisation (up to 81%) followed by alkaline-peroxide and ultrasounds (23%). Bead milling and steam explosion remarkably increased the methane production rate, although the highest yield (377 mL CH4/g SV) was achieved by alkali pretreatment. Nevertheless, some pretreatments inhibited biogas production and resulted in lag phases of 7-9 days. Hence, experiments using only the pretreated solid phase were performed, which resulted in a decrease in the lag phase to 2-3 days for the alkali pretreatment and slightly increased biomass biodegradability of few samples. The limiting step during the BMP test (hydrolysis or microbial inhibition) for each pretreatment was elucidated using the goodness of fitting to a first order or a Gompertz model. Finally, the use of digestate as biofertilizer was evaluated applying a biorefinery concept.
Classification: anaerobic digestion
kinetic model
Peer Review: SI
DOI: 10.1016/j.biortech.2018.02.063.
Sponsor: Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria – INIA”, “Ministerio de Economía y Competitividad – MINECO (RTA2013-00056-C03-02) supported by FEDER program,
Junta de Castilla y León – JCyL (VA094U14)
Junta de Castilla y León – JCyL Doctorate Scholarship.
Language: eng
Rights: info:eu-repo/semantics/openAccess
Appears in Collections:GTA - Artículos de revista
DEP48 - Artículos de revista

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