RT info:eu-repo/semantics/article
T1 Effect of pretreatments on biogas production from microalgae biomass grown in pig manure treatment plants
A1 Martín Juarez, Judit
A1 Riol Pastor, Elena
A1 Fernández Sevilla, Jose María
A1 Muñoz Torre, Raúl
A1 García Encina, Pedro Antonio
A1 Bolado Rodríguez, Silvia
K1 Anaerobic digestion
K1 Fertilizer
K1 Inhibition
K1 Kinetic model
K1 Methane
AB 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.
PB Elsevier
YR 2018
FD 2018
LK http://uvadoc.uva.es/handle/10324/28604
UL http://uvadoc.uva.es/handle/10324/28604
LA eng
NO Bioresource Technology. https://doi.org/10.1016/j.biortech.2018.02.063.
DS UVaDOC
RD 06-ago-2024