Issue link: http://winesandvines.uberflip.com/i/137110
co v e r s t o r y year's worth of rainwater is filtered over a six-month period. This helps spread out the load on the filters and ensures clean water. 4. Nanofiltration membranes allow the chemicals in cleaning solutions to pass through, and both the chemicals and the water can be re-used in cleaning processes. The winery is plumbed for clean-in-place tanks, and 14 new, 2,000-liter teaching tanks should arrive shortly for this purpose. Boulton hopes to reuse the chemicals and water at least 10 times and to recapture them at 90% recovery. The chemicals used are dilute potassium hydroxide for high-pH cleaning and potassium bisulfate instead of sodium-based caustic, citric acid or other organic cleaners. Because the winery uses "warmer" cold water rather than below-freezing glycol for cooling tanks, it avoids buildup of tartrates, which would have to be removed from its fermentors with strong base cleaners and high temperatures. Block emphasizes the importance of the CIP systems and their recycling. "These are techniques long used in dairy, pharmaceutical and brewing," he says. He should know, having worked in pharmaceuticals before turning to enology. "If your sanitation is bad there, you can kill people. In winemaking, you just produce bad wine." There won't be much wastewater, but it would be low in solids and could be used for irrigation. Organic waste goes to the campus biodigestor, which generates methane (biogas) for heating. View from the Jackson family T hough Jess Jackson was very interested in water us- age and other sustainability issues, the donation to UC Davis Robert Mondavi Institute for Wine and Food Science was made by his family in his honor after his death two years ago. His eldest daughter with Katie Jackson is director of community outreach and co-manager of government relations and sustainability at Jackson Family Wines. Barbara Banke, Katie Jackson, serves as the director of community outreach and is comanager of government rela- tions and sustainability at Jackson Family Wines. "My parents were very enthusiastic about the LEED-certified teaching winery (and contributed to it)," Katie Jackson said. "They were also very interested in water reuse, carbon sequestration and sustainability in general. They thought it would be great to have a building to test and demonstrate these ideas." She added that Jackson Family Wines is testing water reuse and carbon sequestration at its own properties as well. P.F. 30 W in e s & V i ne s J U LY 2 013