Inoculum composition determines microbial community and function in an anaerobic sequential batch reactor
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Perrotta-2017-Inoculum composition determines.pdf
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Author(s)
Kumaraswamy, Rajkumari
Bastidas-Oyanedel, Juan R.
Rodriguez, Jorge
Perrotta, Allison
Alm, Eric J
Date Issued
February 2017
Journal
PLoS ONE
Publisher
Public Library of Science
Citation
Perrotta, Allison R.; Kumaraswamy, Rajkumari; Bastidas-Oyanedel, Juan R.; Alm, Eric J. and Rodríguez, Jorge. “Inoculum Composition Determines Microbial Community and Function in an Anaerobic Sequential Batch Reactor.” Edited by Zaid Abdo. PLOS ONE 12, no. 2 (February 2017): e0171369 © 2017 Perrotta et al
Version
Final published version
Abstract
The sustainable recovery of resources from wastewater streams can provide many social and environmental benefits. A common strategy to recover valuable resources from wastewater is to harness the products of fermentation by complex microbial communities. In these fermentation bioreactors high microbial community diversity within the inoculum source is commonly assumed as sufficient for the selection of a functional microbial community. However, variability of the product profile obtained from these bioreactors is a persistent challenge in this field. In an attempt to address this variability, the impact of inoculum on the microbial community structure and function within the bioreactor was evaluated using controlled laboratory experiments. In the course of this work, sequential batch reactors were inoculated with three complex microbial inocula and the chemical and microbial compositions were monitored by HPLC and 16S rRNA amplicon analysis, respectively. Microbial community dynamics and chemical profiles were found to be distinct to initial inoculate and highly reproducible. Additionally we found that the generation of a complex volatile fatty acid profile was not specific to the diversity of the initial microbial inoculum. Our results suggest that the composition of the original inoculum predictably contributes to bioreactor community structure and function.
MIT Department
Broad Institute of MIT and Harvard
Massachusetts Institute of Technology. Department of Biological Engineering
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1371/journal.pone.0171369
