The type of carbohydrates specifically selects microbial community structures and fermentation patterns

Chatellard, L. , Trably, E. and Carrère, H. (2016) The type of carbohydrates specifically selects microbial community structures and fermentation patterns. Bioresource Technology, 221, pp. 541-549. (doi: 10.1016/j.biortech.2016.09.084) (PMID:27686722)

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Abstract

The impact on dark fermentation of seven carbohydrates as model substrates of lignocellulosic fractions (glucose, cellobiose, microcrystalline cellulose, arabinose, xylose, xylan and wheat straw) was investigated. Metabolic patterns and bacterial communities were characterized at the end of batch tests inoculated with manure digestate. It was found that hydrogen production was linked to the sugar type (pentose or hexose) and the degree of polymerisation. Hexoses produced less hydrogen, with a specific selection of lactate-producing bacterial community structures. Maximal hydrogen production was five times higher on pentose-based substrates, with specific bacterial community structures producing acetate and butyrate as main metabolites. Low hydrogen amounts accumulated from complex sugars (cellulose, xylan and wheat straw). A relatively high proportion of the reads was affiliated to Ruminococcaceae suggesting an efficient hydrolytic activity. Knowing that the bacterial community structure is very specific to a particular substrate offers new possibilities to design more efficient H2-producing biological systems.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Chatellard, Dr Lucile
Authors: Chatellard, L., Trably, E., and Carrère, H.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:Bioresource Technology
Publisher:Elsevier
ISSN:0960-8524
ISSN (Online):1873-2976
Published Online:20 September 2016

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