Influence of different pre-treatment routes on the anaerobic digestion of a filamentous algae

The anaerobic digestion of outdoor cultivated Rhizoclonium biomass was investigated in this study. The influence of applying mechanical and biological pre-treatment methods prior to the biomass digestion on the overall methane yields was examined. The results show that the application of a combined...

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Bibliographic Details
Published in:Renewable energy 2013-02, Vol.50, p.476-480
Main Authors: Ehimen, E.A., Holm-Nielsen, J.-B., Poulsen, M., Boelsmand, J.E.
Format: Article
Language:English
Subjects:
Algae
Anaerobic digestion
Applied sciences
Biomass
Biomass pre-treatment
Blending
Digestion
Energy
Exact sciences and technology
Methane
Natural energy
Outdoor
pretreatment
Renewable energy
renewable energy sources
Rhizoclonium
Rhizoclonium sp
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Summary:The anaerobic digestion of outdoor cultivated Rhizoclonium biomass was investigated in this study. The influence of applying mechanical and biological pre-treatment methods prior to the biomass digestion on the overall methane yields was examined. The results show that the application of a combined biomass blending (20% compared to use of a mechanical size reduction method alone. The methane yields from Rhizoclonium biomass were however observed to be considerably lower than those of other algae species from the literature. ► CH4 increase (>10%) was seen with ultrasonic pre-treatment of Rhizoclonium samples. ► Enzymatic pre-treatment further improved the CH4 yields by >20%. ► CH4 production from Rhizoclonium was less than other reported microalgae species.
ISSN:0960-1481
1879-0682
DOI:10.1016/j.renene.2012.06.064