Microalgae as substrates for fermentative biogas production in a combined biorefinery concept.
By J. Mussgnug, V. Klassen, Andreas Schlüter, Olaf Kruse. Journal of Biotechnology, 2010
686 citations recorded by the source corpus.
Most organic matter can be used for bioenergy generation via anaerobic fermentation. Today, crop plants like maize play the dominant role as substrates for renewable biogas production. In this work we investigated the suitability of six dominant microalgae species (freshwater and saltwater algae and cyanobacteria) as alternative substrates for biogas production. We could demonstrate that the biogas potential is strongly dependent on the species and on the pretreatment. Fermentation of the green alga Chlamydomonas reinhardtii was efficient with a production of 587 ml(±8.8 SE) biogas g volatile solids(-1) (VS(-1)), whereas fermentation of Scenedesmus obliquus was inefficient with only 287 ml(±10.1 SE) biogas g VS(-1) being produced. Drying as a pretreatment decreased the amount of biogas production to ca. 80%. The methane content of biogas from microalgae was 7-13% higher compared to biogas from maize silage. To evaluate integrative biorefinery concepts, hydrogen production in C. reinhardtii prior to anaerobic fermentation of the algae biomass was measured and resulted in an increase of biogas generation to 123% (±3.7 SE). We conclude that selected algae species can be good substrates for biogas production and that anaerobic fermentation can seriously be considered as final step in future microalgae-based biorefinery concepts.
Subfields: Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/c57d05af38deca951c9aff03cf53591e8c43e328
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Citations in the corpus
- Screening and selection of growth-promoting bacteria for Dunaliella cultures (2013, background): “has been proposed for carbon dioxide 65 and ammonium remediation [21], biofuel production [22] and methane production [23].”
- Ability of a mutant strain of the microalga Chlorella sp. to capture carbon dioxide for biogas upgrading (2012, background): “[34] concluded that the residues of microalgal biomass for anaerobic fermentation can seriously be considered as final step in future microalgae-based biorefinery concepts.”
- Impact of microalgae characteristics on their conversion to biofuel. Part II: Focus on biomethane production (2012, background): “…as a substrate under two diff erent HRTs revealed methane conversion effi cencies of 29 and 49% under 16 and 28 days, respectively.12 In the case of Scenedesmus obliquus, Mussgnug et al.10 found that aft er six months of digestion, the cellular disintegration of this species was negligible.”
- Microalgal hydrogen production research (2016, background): “reinhardtii with the anaerobic fermentation of the residual biomass led to enhanced biogas production (~720 mL g¡1 VS), mostly due to the enhanced starch and lipid content of the cells during H2 production stage [150]”
- Characteristics and potential of micro algal cultivation strategies: a review (2012, neutral): “Scenedesmus obliquus (Mussgnug et al., 2010).”
- Enhanced methane production of Chlorella vulgaris and Chlamydomonas reinhardtii by hydrolytic enzymes addition (2014, neutral): “[30] and higher than the value reported by Passos et al.”