Journal
JOURNAL OF BIOTECHNOLOGY
Volume 215, Issue -, Pages 52-61Publisher
ELSEVIER
DOI: 10.1016/j.jbiotec.2015.06.396
Keywords
Microalgae; Scenedesmus obliquus; Biogas; Microbial community; Next-generation sequencing; Metagenomics
Categories
Funding
- Hungarian Government [GOP-1.1.1-11-2012-0128, PIACA 3-1-2013-0145]
- Research and Technology Innovation Fund
- EU [H2020-LCE-2014-2015-646533]
Ask authors/readers for more resources
A microalgal biomass offers a potential alternative to the maize silage commonly used in biogas technology. In this study, photoautotrophically grown Scenedesmus obliquus was used as biogas substrate. This microalga has a low C/N ratio of 8.5 relative to the optimum 20-30. A significant increase in the ammonium ion content was not observed. The methane content of the biogas generated from Sc. obliquus proved to be higher than that from maize silage, but the specific biogas yield was lower. Semi-continuous steady biogas production lasted for 2 months. Because of the thick cell wall of Sc. obliquus, the biomass-degrading microorganisms require additional time to digest its biomass. The methane concentration in the biogas was also high, in co-digestion (i.e., 52-56%) as in alga-fed anaerobic digestion (i.e., 55-62%). These results may be related to the relative predominance of the order Clostridiales in co-digestion and to the more balanced C/N ratio of the mixed algal-maize biomass. Predominance of the order Methanosarcinales was observed in the domain Archaea, which supported the diversity of metabolic pathways in the process. (C) 2015 The Authors. Published by Elsevier B.V.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available