Effect of pretreatments on biogas production from microalgae biomass grown in pig manure treatment plants

Copyright © 2018 Elsevier Ltd. All rights reserved..

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.

Medienart:

E-Artikel

Erscheinungsjahr:

2018

Erschienen:

2018

Enthalten in:

Zur Gesamtaufnahme - volume:257

Enthalten in:

Bioresource technology - 257(2018) vom: 05. Juni, Seite 30-38

Sprache:

Englisch

Beteiligte Personen:

Martín Juárez, Judit [VerfasserIn]
Riol Pastor, Elena [VerfasserIn]
Fernández Sevilla, José M [VerfasserIn]
Muñoz Torre, Raúl [VerfasserIn]
García-Encina, Pedro A [VerfasserIn]
Bolado Rodríguez, Silvia [VerfasserIn]

Links:

Volltext

Themen:

Anaerobic digestion
Biofuels
Fertilizer
Inhibition
Journal Article
Kinetic model
Manure
Methane
OP0UW79H66

Anmerkungen:

Date Completed 30.05.2018

Date Revised 02.12.2018

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.biortech.2018.02.063

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM281401926