Flavor Colloidal Haze Removal

What causes colloidal haze in flavors?

Consumers often expect beverages to remain clear throughout shelf life. Colloidal haze can form when substances bond and create molecules large enough to remain suspended in a product, causing turbidity.

In flavors, haze may be associated with fusel oils, terpenes, essential oils, polysaccharides, pectins, higher fatty acids and their esters. These substances contribute important flavor and taste characteristics, but differences in their solubility in ethanol or water can also contribute to haze formation.

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How is colloidal haze removed?

Colloidal haze removal is a complex step in flavor processing. Chilling the liquid during filtration can help form particles for removal. Technologies that combine filtration and adsorption can then address particles and the colloidal material present in flavors, ingredients and blends.

Depth filter sheets can also support microbial bioburden reduction. When critical microbial removal is required, final membrane filtration is still necessary.

Depth filtration options for flavor processing

SUPRApak™ Plus modules with Seitz® depth filter media combine surface filtration, depth filtration and adsorption. Feed and filtrate channels create a fluid flow path that supports use of the sheet material and its adsorptive capacity in an enclosed-system alternative to flat-sheet filtration.

SUPRApak Plus modules

SUPRApak PW modules: For standard processes where inorganic filter aids are needed to achieve the required final product clarity.
SUPRApak PH modules: For ion-sensitive processes where preventing crystal precipitation in the filtrate is important.
SUPRApak PZ modules: Made with 100% pure cellulose sheet media for the lowest possible impact on color and flavor when processing high-quality products.

SUPRAdisc II depth filter modules

SUPRAdisc™ II X-Series depth filter modules: For standard processes where inorganic filter aids are needed to achieve the required final product clarity and a lenticular housing is available.
SUPRAdisc II C-Series modules: For ion-sensitive processes where preventing crystal precipitation in the filtrate is important.
SUPRAdisc II ZD Series depth filter modules: Made with 100% pure cellulose sheet media for the lowest possible impact on color and flavor when processing high-quality products.

Seitz depth filter sheets

Seitz K-Series depth filter sheets: For standard processes where inorganic filter aids are needed to achieve the required final product clarity and a depth filter press is in place.
Seitz IR-Series depth filter sheets: For ion-sensitive processes where preventing crystal precipitation in the filtrate is important.
Seitz ZD Series depth filter sheets: Made with 100% pure cellulose sheet media for the lowest possible impact on color and flavor when processing high-quality products with a depth filter press.

Choose the right approach for your process

The appropriate filtration approach depends on the source of turbidity, process conditions, product characteristics and installed equipment. Pall experts can help you review your flavor process and identify relevant filtration options.