Lees filtration is both an important process in wine production and one of the least exploited. It is definitely not glamorous, as the lees are composed of gummy, thick, pasty materials that are difficult to move and process in a timely manner. However, lees contain a large number of organisms that work both for and against good wine quality. If a winery wants to recover quality wine from juice lees, there is only a short window of time when the wine can be extracted from the lees matrix and add...