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Microbial diversity of mesophilic methanogenic consortium that can degrade long-chain fatty acids in chemostat cultivation

Paper ID Volume ID Publish Year Pages File Format Full-Text
21881 43241 2006 10 PDF Available
Title
Microbial diversity of mesophilic methanogenic consortium that can degrade long-chain fatty acids in chemostat cultivation
Abstract

We established a chemostat cultivation method for a mesophilic methanogenic consortium that could degrade long-chain fatty acids (LCFA) using a completely stirred tank reactor (CSTR) fed with synthetic wastewater containing oleic and palmitic acids as the carbon and energy sources. The critical dilution rate of the chemostat, in which most of the introduced LCFA were decomposed and mineralized, was 0.4 d−1. The microbial community under steady-state condition at this dilution rate was analyzed by 16S rRNA gene sequencing. We detected the following major groups of methanogens within the archaeal community: the aceticlastic genera Methanosaeta and Methanosarcina and the hydrogenotrophic genus Methanospirillum. We also detected organisms that were closely related to fatty-acid oxidizing bacteria affiliated with the family Syntrophomonadaceae. However, bacteria belonging to the phyla Bacteroidetes and Spirochaetes, which are phylogenetically distant from known fatty-acid oxidizing bacteria, apparently predominated in the population, indicating that they play important roles in LCFA degradation within the chemostat.

Keywords
methane fermentation; long-chain fatty acids; phylogenetic analysis; 16S rRNA gene; chemostatcultivation; wastewater
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Microbial diversity of mesophilic methanogenic consortium that can degrade long-chain fatty acids in chemostat cultivation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 102, Issue 6, December 2006, Pages 535–544
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
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us