Etude de la clarification de la bière de garde par microfiltration tangentielle – Application de la technologie RVF.

In: 6ième Colloque PROSETIA, Versailles – St Cyr, 19-21 Mars 2001Etude de la clarification de la bière de garde par microfiltration tangentielle – Application de la technologie RVF.. 6. Colloque PROSETI

Le nettoyage et la désinfection des membranes de filtration tangentielle dans l'industrie alimentaire. Revue bibliographique

National audienc

Le nettoyage et la désinfection des membranes de filtration tangentielle dans l'industrie alimentaire. Revue bibliographique

National audienc

Water, wastewater and waste management in brewing industries

Water and wastewater management constitutes a practical problem for the food and beverage industry including the brewing industry. In spite of significant improvement over the last 20 years, water consumption and disposal remain critical from an environmental and economic standpoint. This paper gives an overview of the world beer market in order to highlight the heterogeneity in capacity of global beer production. From a synthesis of existing literature, water consumption is analysed and the most common treatments and the associated costs are reported. Finally, biological and technical alternatives including membrane operation processes and economic reality are described

Détermination des pressions transmembranaires en MFT approches analytique et numérique des profils de pression validation expérimentale

*INRA LGPTA Villeneuve d'Ascq Diffusion du document : INRA LGPTA Villeneuve d'AscqNational audienc

Techniques en brasserie: Technologies associées à la clarification.

Techniques en brasserie: Technologies associées à la clarification

Techniques en brasserie: Opportunités et réalité des procédés membranaires.

Techniques en brasserie: Opportunités et réalité des procédés membranaires

Techniques en brasserie: Opportunités et réalité des procédés membranaires.

Techniques en brasserie: Opportunités et réalité des procédés membranaires

The effect of oscillatory flow on crossflow microfiltration of beer in a tubular mineral membrane system - membrane fouling resistance decrease and energetic considerations

International audienc

Cell adhesion and related fouling mechanism on a tubular ceramic microfiltration membrane using Bacillus cereus spores

International audienceAdhesion of microorganisms to the membrane surface is an important and critical first step in biofilm fouling. Fouling mechanisms governing the adhesion of Bacillus cereus spores on a 0.45 mu m tubular ceramic microfiltration membrane together with the relationship between hydraulic and microbiological cleanliness were investigated. Hydraulic cleanliness was evaluated using three parameters: percent flux recovery (FR), percent reversible removed fouling (RF) and a hydraulic cleanliness criterion (HCC). Microbiological cleanliness was assessed from the residual microbial population onto the membrane surface remaining after the fouling-rinsing sequence. The residual contamination (median value equal to 5.2 log cfu cm(-2) for the whole set of experiments) was found to be uniform along the membrane path. Flux versus time curves supported the intermediate blocking filtration law at the initial stages of fouling during which microfiltration behaves as a dead-end filtration. Under fixed hydrodynamic shear conditions and solution chemistry (pH, ionic strength), cell - membrane adhesion was shown to be predominantly controlled by the permeation drag force. The residual contamination level could be predicted by means of a linear relationship involving two independent variables derived from fouling data: the blocked area per unit filtrate volume associated with the intermediate blocking filtration law (sigma) and a fouling parameter (noted F-y). A correlation was found between the residual spore population (median log N) and the residual irreversible fouling resistance. FR appeared to be a good indicator of microbiological cleanliness. A calculation using the actual shape of Bacillus cereus spores appeared to partly explain the discrepancies observed between the predicted and observed normalized flux decline following rinsing. This emphasized the large fouling capability of adhered bacteria, which resulted in the substantial water flux declines left after rinsing