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Open AccessArticle

Augmentation of Granular Anaerobic Sludge with Algalytic Bacteria Enhances Methane Production from Microalgal Biomass

1
Department of Biological Engineering, Utah State University, Old Main Hill 4105, Logan, UT 84322-4105, USA
2
Department of Mathematics and Statistics, Utah State University, Old Main Hill 3900, Logan, UT 84322-3900, USA
*
Author to whom correspondence should be addressed.
Current address: Department of Biological Science, Florida State University, 319 Stadium Drive, Tallahassee, FL 32306-4295, USA.
Fermentation 2019, 5(4), 88; https://doi.org/10.3390/fermentation5040088
Received: 19 July 2019 / Revised: 25 September 2019 / Accepted: 29 September 2019 / Published: 30 September 2019
(This article belongs to the Special Issue Fermentation Process in Biorefinery)
The efficiency of anaerobic digestion relies upon activity of the inoculum converting organic substrate into biogas. Often, metabolic capacity of the inoculum needs to be augmented with new capabilities to accommodate changes in the substrate feed composition. However, bioaugmentation is not a widely used strategy possibly due to the lack of studies demonstrating successful applications. This study describes the bioaugmentation of granular anaerobic sludge digesting mixed algal biomass in batch-scale reactors. The addition of an algalytic bacterial mixture to the granular consortium increased methane yield by 11%. This study also investigated changes in the microbial 16SrRNA composition of the augmented and non-augmented granular inoculum, which demonstrates a significant change in the hydrolytic microbial community. Overall, the studies’ results aim to provide a feasible checklist to assess the success rates of bioaugmentation of anaerobic digestion applications. View Full-Text
Keywords: anaerobic digestion; granular anaerobic sludge; bioaugmentation; microalgae; algalytic bacteria anaerobic digestion; granular anaerobic sludge; bioaugmentation; microalgae; algalytic bacteria
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MDPI and ACS Style

Doloman, A.; Pererva, Y.; Cortez, M.H.; Sims, R.C.; Miller, C.D. Augmentation of Granular Anaerobic Sludge with Algalytic Bacteria Enhances Methane Production from Microalgal Biomass. Fermentation 2019, 5, 88.

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