Method for upgrading and reconstructing waste coffee grounds into antioxidant dietary fibers

By combining microwave-assisted extraction and enzyme treatment methods, more soluble antioxidant substances are extracted from waste coffee grounds, solving the problem of low extraction efficiency in the prior art, and achieving efficient antioxidant and improved prebiotic functional components.

CN120477381APending Publication Date: 2025-08-15SOREMARTEC SA(BE)
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Patent Information

Application Number
CN202510163320.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-02-14
Filing Date
2025-02-14
Publication Date
2025-08-15

AI Technical Summary

Technical Problem

The prior art is difficult to efficiently extract soluble antioxidant substances, especially prebiotic functional components and polyphenols, from waste coffee grounds, resulting in limited antioxidant and probiotic effects in the intestine.

Method used

A combination of microwave-assisted extraction (MAE) and enzyme-assisted extraction (EAE) is used, and microwave-assisted extraction is performed first and then enzyme treatment is carried out to optimize the extraction sequence to improve the total amount and quality of soluble substances.

Benefits of technology

The amount of soluble substances and antioxidant properties extracted from waste coffee grounds have been significantly improved, the intestinal effect of prebiotic functional components has been enhanced, and the antioxidant properties and yield have been improved.

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Abstract

A method for upgrading waste coffee grounds into antioxidant dietary fibers comprises the following steps: a) performing microwave-assisted extraction (MAE) on a waste coffee grounds (SCG) material in water at a temperature of at most 200 DEG C for a time of at least 5 minutes; and then b) subjecting the waste coffee grounds material extracted according to step a) to enzyme-assisted extraction (EAE) in an aqueous solution comprising an enzyme having endoglucanase and / or cellulase activity, and recovering soluble substances. In a preferred embodiment, the SCG is pre-treated prior to the MAE extraction step, the pre-treatment being selected from pulsed electric field treatment or high voltage extraction, or both.
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