Shifts in microbial community structure of granular and liquid biomass in response to changes to infeed and digester design in anaerobic digesters receiving food-processing wastes

Nelson, Michael C., Morrison, Mark, Schanbacher, Floyd and Yu, Zhongtang (2012) Shifts in microbial community structure of granular and liquid biomass in response to changes to infeed and digester design in anaerobic digesters receiving food-processing wastes. Bioresource Technology, 107 135-143. doi:10.1016/j.biortech.2011.12.070


Author Nelson, Michael C.
Morrison, Mark
Schanbacher, Floyd
Yu, Zhongtang
Title Shifts in microbial community structure of granular and liquid biomass in response to changes to infeed and digester design in anaerobic digesters receiving food-processing wastes
Journal name Bioresource Technology   Check publisher's open access policy
ISSN 0960-8524
1873-2976
Publication date 2012
Sub-type Article (original research)
DOI 10.1016/j.biortech.2011.12.070
Open Access Status
Volume 107
Start page 135
End page 143
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Abstract There have been few studies, to date, examining the effect of seed sludge on the microbial community established in a new anaerobic digestion (AD) system and whether or not the population present in the seed sludge establishes it self as the predominant population. Further, no reported studies have yet examined the differences in microbial populations that result from the formation of granular biomass in upflow anaerobic sludge blanket (UASB) systems. This study focused on examining the changes in microbial diversity between the initial seed sludge and the community that becomes established in a new digester. Using 16S rRNA clone libraries the diversity of microbes in both the granular and liquid biomass fractions from 3 AD sludge samples was examined and compared. Results showed that each sample had unique microbial community, with the distribution of sequences at the phylum level highly variable. This suggests that the feedstock had an effect of enriching microbial populations that are uniquely suited to a particular feedstock. Differences between the granular and liquid biomass fractions of each sample were less pronounced than differences attributable to the change in feedstock, however the results suggest that there are different functional groups in each fraction.
Keyword Anaerobic digestion
Granule
Microbial diversity
Seed sludge
UASB
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: UQ Diamantina Institute Publications
 
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