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Reverse Osmosis (RO)

A winemaking process that has several uses. Reverse Osmosis (RO) is used to remove water from wine must, increasing the potential alcohol concentration. RO is also used to remove excess alcohol from finished wine. This process may become more common if global temperatures continue to increase, driving-up the sugar content in ripe grapes. Recently, RO has been used to remove unwanted compounds such as 4-ethylphenol, a byproduct of Brettanomyces contamination.
 Reverse Osmosis (RO) - Wine Glossary


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