RT Journal Article SR Electronic T1 Sugar Extraction from Grape Pomace with A 3-Stage Countercurrent System JF American Journal of Enology and Viticulture JO Am J Enol Vitic. FD American Society for Enology and Viticulture SP 14 OP 20 DO 10.5344/ajev.1965.16.1.14 VO 16 IS 1 A1 R. J. Coffelt A1 H. W. Berg A1 Paul Frei A1 E. A. Rossi, Jr. YR 1965 UL http://www.ajevonline.org/content/16/1/14.abstract AB The main factors involved in countercurrent extraction of sugar from pomace are the liquid content of the feed, the degree of pressing, and the water added. The time the pomace is in contact with the extraction liquid is of less importance. Countercurrent extraction is a more satisfactory washing system than simple multiple-contact since satisfactory sugar levels in both product and washed pomace are easily attainable with countercurrent washing.