Chitosan Flocculation in Wine Brewing

Chitosan Flocculation in Wine Brewing

Chitosan, a natural cationic polymer, is an efficient clarifying agent in winemaking. It removes suspended particles, yeast residues, colloids and unstable proteins to stabilize wine and improve clarity.

Under wine’s weak acidic environment, chitosan carries positive charges, which neutralize negative charges on impurity particles, breaking the stability of the colloidal system. Its long molecular chain forms bridges between dispersed particles, adsorbing and gathering fine impurities into large, dense flocs.

First, dissolve food-grade chitosan in dilute acid to make a uniform solution. Add it slowly into post-fermentation wine with gentle stirring to ensure even distribution. Then let the wine stand still: charged neutralization and bridging adsorption happen quickly, making impurities aggregate into flocs.

Under gravity, flocs settle rapidly to the bottom, forming a compact sediment layer. The upper layer becomes clear, pure wine, achieving solid-liquid separation. This method is safe, eco-friendly and efficient, with no harmful residues, widely used in modern winemaking clarification.

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Our main products: chitin, chitosan, Hydroxypropyl Chitosan, Hydrochloride Chitosan, Chitosan Lactate, Carboxymethyl Chitosan.

With origin: Chitosan Fresh North Atlantic Shrimp Shell/Crab Shell Origin

Chitosan Aspergillus Niger Origin

Chitosan Agaricus bisporus Origin mushroom

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