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Cited 7 time in webofscience Cited 11 time in scopus
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Tracking microbial community shifts during recovery process in overloaded anaerobic digesters under biological and non-biological supplementation strategies

Authors
Rhee, ChaeyoungPark, Sung-GwanKim, Dae WookYu, Sung IlShin, JuheeHwang, SeokhwanShin, Seung Gu
Issue Date
Nov-2021
Publisher
ELSEVIER SCI LTD
Keywords
Bioaugmentation; Magnetite; Coenzyme M; Propionate; Next-generation sequencing
Citation
BIORESOURCE TECHNOLOGY, v.340
Indexed
SCIE
SCOPUS
Journal Title
BIORESOURCE TECHNOLOGY
Volume
340
URI
https://scholarworks.bwise.kr/gnu/handle/sw.gnu/3113
DOI
10.1016/j.biortech.2021.125614
ISSN
0960-8524
Abstract
Anaerobic digestion encounters operational instability due to fluctuations in organic loading. Propionic acid (HPr) is frequently accumulated due to its unfavorable reaction thermodynamics. Here, 'specific' bioaugmentation using HPr enrichment cultures (three different injection regimes of quantity and frequency) was compared with 'non-specific' bioaugmentation using anaerobic sludge, and with non-biological supplementation of magnetite or coenzyme M. The specific bioaugmentation treatments showed superior recovery responses during continuous feeding after a peak overload. A 'one-shot' bioaugmentation with enrichment showed the best remediation, with similar to 25% recovery time and >10% CH4 conversion efficiency compared to the control. Consecutive bioaugmentation showed evidence of increased stability of the introduced community. Families Synergistaceae, Syntrophobacteraceae, and Kosmotogaceae were likely responsible for HPr-oxidation, in potential syntrophy with Methanoculleus and Methanobacterium. The different supplementation strategies can be considered to reduce the effect of start-up or overload in anaerobic digesters based on the availability of supplementation resources.
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공과대학 (에너지공학과)
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