Patent ID: 9476020
Filing Date: 2016-10-25
CPC Classification: B01D,B01J,C12C,C12H

Claim Text:
1. A method of regenerating polyvinylpolypyrrolidone (PVPP) particles in preparing a yeast fermented beverage, comprising: (a) fermenting wort with a biologically active yeast to produce a fermented liquid comprising yeast, alcohol, polyphenols and protein; (b) combining the fermented liquid with polyvinylpolypyrrolidone (PVPP) particles to bind at least a fraction of the polyphenols and/or the proteins contained in the fermented liquid to the PVPP particles, wherein the yeast in the fermented liquid is at a concentration of at least 5 mg of wet yeast per kg of fermented liquid; (c) removing a slurry containing the PVPP particles and yeast from the fermented liquid by means of membrane filtration; (d) separating the slurry into a yeast-enriched fraction and a PVPP-enriched fraction by means of a sedimentation separation technique selected from flotation separation, settling separation and separation using a hydrocyclone; (e) regenerating the PVPP particles during and/or after the separation (d) by desorbing polyphenols and/or protein from the PVPP-particles and separating the desorbed polyphenols and/or the desorbed protein from the PVPP particles; and (f) recirculating the regenerated PVPP particles to step (b).