Low-strength ultrasonication positively affects methanogenic granules toward higher AD performance:Implications from microbial community shift

Cho, Si Kyung, Kim, Dong Hoon, Quince, Christopher, Im, Wan Taek, Oh, Sae Eun and Shin, Seung Gu (2016) Low-strength ultrasonication positively affects methanogenic granules toward higher AD performance:Implications from microbial community shift. Ultrasonics Sonochemistry, 32. pp. 198-203. ISSN 1350-4177

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Abstract

To elucidate the enhanced methane yield from organic wastes, the effects of low-strength ultrasonication on the microbial community structures in upflow anaerobic sludge blanket reactors were for the first time analyzed using pyrosequencing. Interestingly, a more even microbial community was observed in the ultrasonicated granules than in the control, which could compensate for the decreased richness and resulted in comparable (archaea) or even higher (bacteria) diversity. The ultrasonicated granules contained higher levels of δ-Proteobacteria, of which many are reportedly potential syntrophs, as well as methanogenic genera Methanosaeta, Methanotorris, and Methanococcus. The increased presence of syntrophic bacteria with their methanogenic partners was discussed with respect to hydrogen flux; their selective proliferation seems to be responsible for the enhanced anaerobic performance. This study is the first research shedding light on the novel function of low-strength ultrasound shifting the microbial structure towards better biogas production performance, and will facilitate application of low-strength ultrasound to other bioprocesses.

Item Type: Article
Additional Information: Funding Information: This work was supported by the New & Renewable Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP: 20113030100030 ) grant funded by the Korea Government Ministry of Knowledge Economy and the Dongguk University fund of 2015. Publisher Copyright: © 2016 Elsevier B.V. All rights reserved.
Uncontrolled Keywords: evenness,low-strength ultrasonication,pyrosequencing,syntrophism,upflow anaerobic sludge blanket,δ-proteobacteria,chemical engineering (miscellaneous),environmental chemistry,radiology nuclear medicine and imaging,acoustics and ultrasonics,organic chemistry,inorganic chemistry ,/dk/atira/pure/subjectarea/asjc/1500/1501
Faculty \ School: Faculty of Science > School of Biological Sciences
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Depositing User: LivePure Connector
Date Deposited: 09 Sep 2022 09:31
Last Modified: 30 Sep 2022 02:27
URI: https://ueaeprints.uea.ac.uk/id/eprint/88013
DOI: 10.1016/j.ultsonch.2016.03.010

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