Abstract
Unfiltered wine is a turbid medium that is not generally accepted by the consumer. Therefore, one or several filtration steps are required before bottling. Silicon carbide (SiC) membranes desirable parameters (porosity, tortuosity fluxes) allow filtering several different types of loaded matrices like wine or residue sediment. An in-depth filtration study was carried out on white and red wines to evaluate membrane efficiency and to optimise their cleaning procedure. Retention rates were studied as a function of wine type, filtration mode, and volumetric concentration factor. Compared to ceramic membranes, SiC membrane permeate fluxes are higher, up to a factor of 10 for red wine. For white wines, equivalent permeate fluxes could be obtained with dead-end filtration. Moreover, SiC membranes appear to be effective in obtaining a clear and brilliant wine and do not modify the concentration of the compounds of interest in wine. Finally, an optimised cleaning protocol has been identified and shown to restore a sufficient permeability to the SiC membranes.
Highlights
The presence of cloudiness or deposits in wine has always been perceived by consumers as a defect or undesirable trait of the final product (Rayess and Mietton-Peuchot, 2016)
This part aimed to evaluate the efficiency of Silicon carbide (SiC) m2embrane in wine filtration
Obtaining raw materials for the experiments was difficult for several reasons: firstly, to be as representative as possible of what is going on in the field, it was necessary to obtain at least, one white wine and two red wines
Summary
The presence of cloudiness or deposits in wine has always been perceived by consumers as a defect or undesirable trait of the final product (Rayess and Mietton-Peuchot, 2016). The matrices to be filtered present in the cellar are varied and very complex These rich matrices may cause severe fouling and possibly irreversible modifications of wines organoleptic characteristics. Wine is increasingly filtered on microfiltration membranes, but the performances of currently used technologies limit the efficiency of industrial installations using a high frequency of backwash. The microfiltration membranes currently used for wine filtration are between 0.2 and 1.2 μm pores size. Both organic and ceramic membranes consist of a support layer in addition to a very thin filtration layer. Silicon carbide (SiC) is increasingly used for membrane manufacturing because they are more stable than synthetic membranes, they have a much longer lifetime, and the cleaning-sterilizing process is better due to high temperature
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
