Issue link: http://winesandvines.uberflip.com/i/101495
WINEMAKING Are reverse osmosis and crossflow filtration the same? R everse osmosis, ultra filtration and crossflow filtration are not totally different techniques, but they refer to different uses for the same general method. A membrane can separate various elements in wine into two streams with different components, while traditional filtration simply pushes wine through a ���dead-end��� filter medium and only one stream comes out the other side. Reverse osmosis and ultrafiltration use the crossflow technique (also known as tangential flow filtration), but usually to achieve different goals such as alcohol or ethyl acetate removal than for clarification, removing yeast and bacteria, etc. In crossflow filtration, an incoming feed stream passes��across the surface of a crossflow��membrane, and two exiting streams are generated: a permeate stream (which passes through the membrane) and a retentate stream (which is retained by the membrane.) In crossflow filtration the permeate stream is the target stream (i.e., the filtered wine), whereas in reverse osmosis, the streams are split, something is done to one stream and then the two are put back together, altered by the ���treatment.��� P.F. He says that sales continue to increase. ���Wineries that were not interested in this technology three years ago are now looking to purchase within the next two years.��� Hernandez believes crossflow tech- nology continues to evolve with upgraded automation and minimal oxygen intake. In addition, ���The next phase, high-solids clarification, is now in the marketplace.��� ATP represents Padovan TMCI, which manufactures a complete line of clarification equipment. The smallest crossflow filter is a SMART 40 (40 square meters of surface area) with minimal small footprint. Padovan can manufacture almost any size filter desired based on flow-rate requirements. �� Hernandez says the latest innovation is the Dynamos high solids crossflow filter, which utilizes a slightly different concept. In lieu of polymeric membranes, the unit comes with ceramic discs that rotate at 300 rpm and can handle up to 70% solids. Hernandez says ATP has more than 50 crossflow filters in operation at such wineries as Golden State Soledad, Scheid Vineyards, Constellation���s Turner Road Vintners, Kendall Jackson Vinwood and Gallo Sonoma. No fear of filtration The satisfied winemakers we interviewed about crossflow filtration confirmed that the most up-to-date filtration equipment can be the least intrusive to their wines. While wine marketing departments avoid talking about filtration for fear that the public and wine critics regard it as a negative quality factor, many of the winemakers they work with have been putting it to use for several years now and are very happy with the results. The original, BOTTLE-MATIC-II 3 YEAR WARRANTY INCLUDED Front and Back! MADE IN USA! 21 day trial $1800 for Wines & Vines Readers! Front & Back! Label any cylindrical container fast and accurately from ����� to 8��� diameter, @ Speeds of 1200 Pcs. per hour. NOT A CHEAP, IMPORTED KNOCK-OFF! ISPENSA-MATIC DLabel Dispensers 56 W in e s & V i ne s JANUARY 20 13 STOP Wasting Time Labeling by Hand! Price subject to change without notice. 28220 Playmor Beach Rd, Rocky Mount, MO 65072 Call Toll Free: 1 (800) 325-7303 or (573) 392-7684 FAX:(573) 392-1757; E-mail: info@dispensamatic.com Web: http://www.bottle-labeler.com SEE US AT UNIFIED, BOOTH #2621 2/01/10 SEE US AT UNIFIED, BOOTH #120 u