A Model for Bioaugmented Anaerobic Granulation
Autor: | Yehor Pererva, Anna Doloman, Charles D. Miller, Nicholas S. Flann, Amitesh Mahajan |
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Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
Microbiology (medical)
0303 health sciences Bioaugmentation 030306 microbiology Chemistry Microorganism lcsh:QR1-502 Substrate (chemistry) Cellobiose Pulp and paper industry agent-based model Microbiology lcsh:Microbiology 03 medical and health sciences Anaerobic digestion chemistry.chemical_compound Granulation Biogas biogas bioaugmentation anaerobic granulation Anaerobic exercise cDynoMiCs Original Research 030304 developmental biology |
Zdroj: | Frontiers in Microbiology, 11 Frontiers in Microbiology 11 (2020) Frontiers in Microbiology Frontiers in Microbiology, Vol 11 (2020) |
ISSN: | 1664-302X |
DOI: | 10.3389/fmicb.2020.566826 |
Popis: | Anaerobic granular sludge comprises of highly organized microorganisms with a sophisticated metabolic network. Such aggregates can withstand storage, temperature fluctuations and changes in the substrate supplied for anaerobic digestion. However, substrate change leads to long adaptation of granular consortia, creating lags in the reactor operations. To speed up adaptation and increase digestion efficiency, bioaugmentation with a robust consortium can be performed. The computational study described here aims to elucidate the mechanisms of bioaugmenting anaerobic granules, utilizing the current body of knowledge on metabolic and biochemical interactions between bacteria in such aggregates. Using a cDynoMiCs simulation environment, an agent-based model was developed to describe bioaugmentation for adaptation of cellobiose-degrading granular consortium to a lipid-rich feed. Lipolytic bacteria were successfully incorporated in silico to the stable granular consortia after 40 days of simulation. The ratio of cellobiose and the lipid-derivative, oleate, in the feed played key role to ensure augmentation. At 0.5 g/L of both cellobiose and oleate in the feed, a homogeneous stable augmented consortium was formed and converted the given amount of substrate to 10.9 mg/L of methane as a final product of anaerobic digestion. The demonstrated model can be used as a planning tool for anaerobic digestion facilities considering transition of the inoculum to a new type of feed. |
Databáze: | OpenAIRE |
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