A METHOD AND APPARATUS FOR THE RECOVERY OF PVPP AFTER CONTACT WITH A YEAST FERMENTED BEVERAGE BY SEDIMENTATION SEPARATION.

摘要

The present invention relates to a method of preparing a yeast fermented beverage, said method comprising the steps of: a. fermenting wort with a biologically active yeast to produce a fermented liquid; 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 said PVPP particles; c. removing a slurry containing the PVPP particles and yeast from the fermented liquid; d. separating said 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 before, during and/or after the separation into the yeast-enriched fraction and the PVPP-enriched fraction by desorbing polyphenols and/or protein from said 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. The method according to the present invention can be operated with single use PVPP as well as regenerable PVPP. Furthermore, the method does not require sophisticated filter hardware for regenerating the PVPP.