Tracking microbial community shifts during recovery process in overloaded anaerobic digesters under biological and non-biological supplementation strategies
| Autor: | Sung-Gwan Park, Chaeyoung Rhee, Sung Il Yu, Seokhwan Hwang, Dae Wook Kim, Seung Gu Shin, Juhee Shin |
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| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Methanobacterium Bioaugmentation Environmental Engineering biology Sewage Renewable Energy Sustainability and the Environment Microbiota Bioengineering General Medicine biology.organism_classification Anaerobic digestion Methanoculleus Bioreactors Microbial population biology Syntrophy chemistry Dietary Supplements Propionate Humans Food science Anaerobiosis Waste Management and Disposal Anaerobic exercise Methane |
| Zdroj: | Bioresource technology. 340 |
| ISSN: | 1873-2976 |
| Popis: | 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 ~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. |
| Databáze: | OpenAIRE |
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