Pomace

Pomace or marc is a solid byproduct of the winemaking process. It is derived from the pulp, skins, stems, and seeds of grapes after the juice has been extracted for wine production. Pomace has been used in various ways throughout history and across cultures, including as a fertilizer, a source of biofuel, and a component in the production of certain types of brandy and grappa.

History

The use of pomace dates back to ancient times. The Romans and Greeks used pomace as a fertilizer, recognizing its rich nutrient content. In more recent times, pomace has been used in the production of pomace brandy, a type of brandy made from the fermented pomace.

Composition

Pomace is composed of the skins, pulp, seeds, and stems of grapes. The exact composition can vary depending on the type of grape and the winemaking process. Generally, pomace is rich in fiber, antioxidants, and polyphenols, which are beneficial compounds found in plants.

Uses

Winemaking

In winemaking, pomace is often used to produce a second, less expensive wine known as pomace wine or vin de piquette. This is made by soaking the pomace in water and fermenting it a second time.

Distillation

Pomace can also be distilled to produce a type of brandy known as pomace brandy or marc. This is a common practice in countries such as Italy, where it is known as grappa, and France, where it is known as marc de Bourgogne.

Fertilizer

Due to its rich nutrient content, pomace has been used as a fertilizer for centuries. It can be composted and used to enrich soil, promoting plant growth.

Biofuel

More recently, pomace has been explored as a potential source of biofuel. The high sugar content in the grape skins and pulp can be fermented to produce ethanol, a type of biofuel.

See also

• Winemaking
• Grape
• Pomace brandy
• Biofuel