Method for the regeneration of PVPP from a membrane filter retentate after clarification and stabilization of a yeast fermented beverage
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United States of America Patent
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Oct 25, 2016
Grant Date -
Aug 1, 2013
app pub date -
Jul 18, 2011
filing date -
Jul 22, 2010
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Abstract
A method of preparing a yeast fermented beverage is disclosed, comprising: (a) fermenting wort with yeast to produce a fermented liquid; (b) optionally removing the yeast; (c) mixing the fermented liquid with polyvinylpolypyrrolidone (PVPP) particles; (d) filtering the fermented liquid over a first membrane filter without employing a filter aid; (e) combining a first retentate with an aqueous regeneration liquid to desorb polyphenols and/or protein from the PVPP particles, wherein the aqueous regeneration liquid has a pH of at least 10.0; (f) filtering the combination retentate and regeneration liquid over a second membrane filter without employing a filter aid; and (g) after, optional further refining the regenerated PVPP particles from the second retentate, and recirculating the particles to step (c); wherein macromolecular components contained in the first retentate and/or retained on the second filter are degraded using a degradative agent selected from oxidants, enzymes and combinations thereof.
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