Sustainable Winemaking: Upcycling Grape Pomace, Lees, and Winery Byproducts
Roughly 20% to 30% of the total mass of grapes harvested for winemaking ends up as byproduct. Historically viewed as agricultural waste—or simply dumped into compost heaps and landfills—grape pomace (skins, seeds, and stems), wine lees, and tartrate crystals are now at the center of the circular bioeconomy. Upcycling winery byproducts reduces methane emissions and groundwater pollution while unlocking high-value
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