Publications by authors named "J Sebastien Steyer"

A novel species was isolated as a contaminant in viral transport media at the District of Columbia Department of Forensic Sciences Public Health Laboratory. Phylogenomic and biochemical analyses of the isolate determined that it represented a novel species within . Related strains in public genome databases suggested that this novel species is associated with clinically acquired infections, similar to closely related .

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Article Synopsis
  • Dark fermentation (DF) generates biohydrogen and volatile fatty acids (VFAs) but struggles with slow butyrate consumption.
  • This study explores using artificial microalgae-bacteria consortia to enhance butyrate removal rates, demonstrating that certain microalgae growth isn't hindered by bacteria but actually benefits from their presence.
  • Findings suggest that coupling DF effluents with microalgal cultivation can improve substrate removal and promote the production of valuable biomass.
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The growing use of anaerobic co-digestion (AcoD) in processing organic waste has led to a significant digestate production. To effectively recycle digestate back into soils, it is crucial to understand how operational variables in the AcoD process influence the conversion of organic matter (OM). To address this, a combination of biochemical fractionation and various soil incubation tests were employed to assess the stability of OM in digestates generated from anaerobic continuous reactors fed with a food waste-hay mixture and operating at different hydraulic retention times (HRT) and organic loading rates (OLR).

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Anaerobic digestion (AD) of microalgae is an intriguing approach for bioenergy production. The scaling-up of AD presents a significant challenge due to the systematic efficiency losses related to process instabilities. To gain a comprehensive understanding of AD behavior, this study assessed a modified version of the anaerobic digestion model No1 (ADM1) + Contois kinetics to represent microalgae AD impacted by overloading.

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The potential success of microalgal biofuels greatly depends on the sustainability of the chosen pathway to produce them. Hydrothermal liquefaction (HTL) is a promising route to convert wet algal biomass into biocrude. Recycling the resulting HTL aqueous phase (AP) aims not only to recover nutrients from this effluent but also to use it as a substrate to close the photosynthetic loop and produce algal biomass again and process this biomass again into new biocrude.

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