Search results for "Anaérobie"
showing 3 items of 3 documents
Co-production of Hydrogen and Methane From the Organic Fraction of Municipal Solid Waste in a Pilot Scale Dark Fermenter and Methanogenic Biofilm Rea…
2018
The co-production of biohydrogen and methane from the organic fraction of municipal solid waste was investigated using a two-stage AD system, composed of a pilot scale dark fermenter (DF) and a continuous methanogenic biofilm reactor. From the DF process, a biohydrogen yield of 41.7 (± 2.3) ml H2/gVSadded was achieved. The liquid DF effluent (DFE) was rich in short chain volatile fatty acids, i.e., mainly acetic and butyric acid. The DFE was valorized by producing methane in the methanogenic biofilm reactor. Two methanogenic biofilm reactors were used to assess the biotic and abiotic role of the DFE on the performance of the reactors. Regardless of the different DFE feeding (i.e., biotic an…
Nouvelles stratégies de stabilisation des bactéries extrêmement sensibles à l’oxygène : cas du probiotique Faecalibacterium prausnitzii.
2016
Intestinal bacteria are of growing interest in the areas of health and wellness [1, 3]. The intestinal ecosystem is characterized by its complex composi-tion and its very low oxygen content. Therefore, nu-merous bacterial species isolated from this environ-ment are extremely sensitive to oxygen. This feature is responsible for the difficulty of implementation of these microorganisms for probiotic large-scale appli-cations, particularly during processing and storage. In this presentation, we present the main steps that have been overcome to conserve and design a stabilization strategy for the bacteria Faecalibacterium prausnitzii, recognized for their anti-inflammatory activities intestinal …
Assessment of cross-flow filtration as microalgae harvesting technique prior to anaerobic digestion: Evaluation of biomass integrity and energy demand
2018
[EN] In the present study, the effect of cross-flow filtration (CFF) on the overall valorization of Chlorella spp. microalgae as biogas was assessed. The effect of CFF on microalgae cell integrity was quantified in terms of viability which was correlated with the anaerobic biodegradability. The viability dropped as the biomass concentration increased, whereas anaerobic biodegradability increased linearly with the viability reduction. It was hypothesized that a stress-induced release and further accumulation of organic polymers during CFF increased the flux resistance which promoted harsher shear-stress conditions. Furthermore, the volume reduction as the concentration increased entailed an …