Deterministic processes drive the microbial assembly during the recovery of an anaerobic digester after a severe ammonia shock
| Autor: | Olivier Chapleur, Laurent Mazéas, Laëtitia Cardona |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
Bioengineering 7. Clean energy 03 medical and health sciences Ammonia chemistry.chemical_compound Bioreactors RNA Ribosomal 16S 0502 economics and business Bioreactor Microbiome Anaerobiosis 050207 economics Waste Management and Disposal 030304 developmental biology 0303 health sciences 050208 finance biology 030306 microbiology Renewable Energy Sustainability and the Environment 05 social sciences General Medicine biology.organism_classification Pulp and paper industry Anaerobic digestion Microbial population biology chemistry 13. Climate action Anaerobic exercise Methane Bacteria Archaea |
| Zdroj: | Bioresource technology. 347 |
| ISSN: | 1873-2976 |
| Popis: | Anaerobic digestion allows to produce sustainable energy but the microbial community involved in this process is highly sensitive to perturbations. In this study, a longitudinal experiment was performed in two sets of triplicate bioreactors to evaluate the influence of ammonia addition on AD microbiome and its recovery. Zeolite was added in three reactors to mitigate the inhibition. Microbial dynamics were monitored with 16S rRNA sequencing at 15 time points. Dominant methanogenic pathways were determined with gas isotopic signature analysis. Zeolite addition did not enable to reduce ammonia inhibition or improve the process under the conditions tested. In all the bioreactors, ammonia inhibition sharply decreased the methane production but the process could restart thanks to the increase of hydrogenotrophic archaea and syntrophic bacteria. Interestingly, similar behaviour was observed in the six reactors. Neutral modelling and null model were used and showed that a deterministic process governed the recovery of AD microbiome after failure. |
| Databáze: | OpenAIRE |
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