Method for preparing high-activity lemon diet fibers

Abstract

The invention discloses a method for preparing high-activity lemon diet fibers, which uses fresh lemon peel residue as a raw material and comprises the following: (1) a process step of enzyme inactivation treatment, which is to scald the lemon peel residue in hot water for 4 to 6 minutes at the temperature of 95 to 100 DEG C to destroy the activity of pectinase in the lemon peel residue; (2) a process step of cooling and dewatering, which is to cool the lemon peel residue after the enzyme inactivation treatment to room temperature in a tap water washing mode and then dewater; (3) a process step of ethanol extraction, which is to soak the dewatered lemon peel residue in 95 volume percent ethanol for at least 90 minutes under normal pressure and at the temperature of 40 to 50 DEG C and filter to obtain filter residue which is lemon diet fibers; and (4) a process step of drying and smashing, which is to pre-freeze the obtained lemon diet fibers, dry with a vacuum freezing dryer until the weight is constant and smash until the grain size is 10 to 40 meshes to obtain the lemon diet fibers.

Description

technical field [0001] The invention belongs to the field of preparation of fruit dietary fiber, in particular to a preparation method of lemon dietary fiber. Background technique [0002] Lemon is a kind of good human body health care fruit, has very high economic value, and my country's lemon processing mainly produces products such as lemon oil, lemon juice (lemon drink), lemon dry sheet, is mainly based on rough processing, and lemon is about Produce 40%~50% skin dregs, in China, most of them are treated as garbage, and are not rationally utilized, which not only causes a great waste of resources, but also pollutes the environment. Lemon zest is rich in dietary fiber, and it is the variety with the highest dietary fiber content among all citrus raw materials. [0003] Dietary fiber is considered to be the "seventh largest nutrient" after carbohydrates, proteins, fats, water, minerals and vitamins. An appropriate amount of dietary fiber in the gastrointestinal tract can ...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the technological process is relatively complicated, and specific strains are required to be expanded and fermented under certain conditions, and H2O2 is also required to The product undergoes decolorization treatment, while H2O2 has strong oxidation properties, it not only has a bleaching effect, but also causes damage to the active ingredients of the product such as flavonoids, vitamins, etc. destroy

In this method, active components such as flavonoids in raw materials are severely damaged due to the adoption of a series of alkali treatment, ultrasonic treatment, and extrusion processes, and its preparation process and required equipment are relatively complicated.

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