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Fluxes in PHA-storing microbial communities during enrichment and biopolymer accumulation processes

Paper ID Volume ID Publish Year Pages File Format Full-Text
33037 44954 2016 12 PDF Available
Title
Fluxes in PHA-storing microbial communities during enrichment and biopolymer accumulation processes
Abstract

•Fluxes in microbial community composition in an enrichment reactor were analysed.•The population was dominated by Flavisolibacter and Zoogloea; proportions varied.•The effect of the underlying flux on polyhydroxyalkanoate accumulation was examined.•PHA content and accumulation parameters remained relatively stable, composition was predictable.•Mixed culture bacterial processes are functionally robust for PHA accumulation.

The use of mixed microbial cultures for the production of polyhydroxyalkanoates (PHAs) is emerging as a viable technology. In this study, 16S rRNA gene amplicon pyrosequencing was used to analyse fluctuations in populations over a 63-day period within a PHA-storing mixed microbial community enriched on fermented whey permeate. This community was dominated by the genera Flavisolibacter and Zoogloea as well as an unidentified organism belonging to the phylum Bacteroidetes. The population was observed to cycle through an increase in Zoogloea followed by a return to a community composition similar to the initial one (highly enriched in Flavisolibacter). It was found that the PHA accumulation capacity of the community was robust to population flux during enrichment and even PHA accumulation, with final polymer composition dependent on the overall proportion of acetic to propionic acids in the feed. This community adaptation suggests that mixed culture PHA production is a robust process.

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Fluxes in PHA-storing microbial communities during enrichment and biopolymer accumulation processes
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Publisher
Database: Elsevier - ScienceDirect
Journal: New Biotechnology - Volume 33, Issue 1, 25 January 2016, Pages 61–72
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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