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A method for continuously extracting protein and dietary fiber from walnut dregs

A technology of dietary fiber and walnut meal, which is applied in the directions of protein food ingredients, vegetable protein processing, protein composition of waste, etc., can solve the problems of not involving the separation and extraction of walnut dietary fiber, insufficient utilization of resources, and low utilization rate of raw materials. , to achieve the effect of shortening the dissolution time, shortening the enzymatic hydrolysis time and uniform moisture content of the material

Active Publication Date: 2015-11-04
山东大树达孚特膳食品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are many production technologies related to the separate preparation of protein in walnut meal, but only related to the separate extraction and preparation process of walnut protein, such as the domestic invention patent "a method for preparing walnut polypeptide powder (patent application number is 200710017281.1, patent Publication number is CN101228918) " and " a kind of preparation method of high-purity walnut protein powder (patent application number is 201210165640.9, and patent publication number is CN102696858A) " all only disclose the method for separately separating and extracting walnut protein from walnut, but neither Involving the separation and extraction of walnut dietary fiber
The extraction product is single, the production cost is relatively high, the utilization rate of raw materials is relatively low, and the full utilization of resources has not been achieved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Vacuum microwave drying

[0029] Put the walnut meal in a vacuum microwave dryer at a vacuum of 70kpa and a microwave power of 150kw for 40 minutes to control the moisture content of the walnut meal at 5wt%. After drying, it is superfinely crushed and passed through a 120-mesh screen.

[0030] (2) Alkaline method-microwave combined extraction of protein

[0031] Mix the ultra-finely pulverized walnut meal powder in (1) with distilled water in a mass ratio of 1:30, then grind it, then add sodium bicarbonate or other edible alkali to adjust the pH to 9.0, and then place it in the microwave In the reactor, the temperature is 55℃, the microwave power is 400w, and the microwave frequency is 1000MHz for 30min. The liquid after microwave extraction is centrifuged at 4000r / min for 15min to separate supernatant A and Precipitation B.

[0032] (3) Freeze-dried protein powder

[0033] Add lactic acid or other edible acid to the supernatant A obtained in (2) to adjust the pH to 4.5, t...

Embodiment 2

[0041] (1) Vacuum microwave drying

[0042] The walnut meal is placed in a vacuum microwave dryer at a vacuum degree of 80kpa and a microwave power of 180kw for 30 minutes to control the moisture content of the walnut meal at 8wt%. After drying, it is superfinely pulverized and passed through a 100-mesh screen.

[0043] (2) Alkaline method-microwave combined extraction of protein

[0044] Mix the ultra-finely pulverized walnut meal powder in (1) with distilled water in a mass ratio of 1:20, then refining, then add sodium bicarbonate or other edible alkali to adjust the pH to 8.5, and then place it in the microwave Microwave-assisted extraction for 35 minutes in the reactor under the conditions of a temperature of 60°C, a microwave power of 300w, and a microwave frequency of 800MHz. The liquid after microwave extraction was centrifuged at 3500r / min for 20min and then supernatant A and precipitate B were separated.

[0045] (3) Freeze-dried protein powder

[0046] Add lactic acid or ot...

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PUM

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Abstract

The invention discloses a continuous extraction method of proteins and meal fibers from walnut meal. The method includes steps of carrying out a microwave drying process to walnut meal for 30min-40min with a vacuum degree being 60kpa-80kpa and a power being 100kW-200kW; after an ultramicro crushing and screening process, extracting walnut proteins from the walnut meal in a manner of a combination of an alkaline-microwave extraction process with a freeze drying process; carrying out a single-step degradation process to a precipitate through a compound enzyme and performing alcohol-precipitation and centrifugation; and carrying out an air-flow spray drying process to obtain water-soluble meal fibers and water-insoluble meal fibers with the air-inlet temperature being 120-180 DEG C, the air-outlet temperature being 60-80 DEG C and the compressed-air flow being 500-800 mL / h. Through the method, the dissolution rate of walnut proteins is increased, activity and nutritive value of the proteins is maintained and enzymatic hydrolysis efficiency and purity and yield of the meal fibers are increased. Recycling of waste materials is achieved and problems of wasting resource and polluting environment are solved.

Description

Technical field [0001] The invention relates to the field of deep processing of agricultural and sideline products, and relates to a method for continuously extracting protein, soluble dietary fiber water and insoluble dietary fiber from walnut meal. Background technique [0002] Walnut, also known as walnut and Qiang peach, belongs to the genus Juglans in the Juglans family. my country's walnut planting area and output rank first in the world, with an annual output of 260,000 tons of walnuts. In daily life, except for a small amount of fresh food and processed into snack foods, most of them are used for oil extraction. Walnut meal is an important by-product of walnut oil processing. After research, the protein content of walnut meal is as high as 30%-40%, and the dietary fiber is as high as 20%-30%. In addition, walnut meal is also rich in vitamins and minerals. However, for a long time, most people only paid attention to the health value of walnut oil and related research, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L1/36A23L1/308A23J3/14A23J1/00A23L1/305A23L25/00
CPCA23J1/005A23L33/185A23L33/22A23V2002/00A23V2250/5108A23V2250/548
Inventor 饶瑜李榕邢亚阁车振明蒋云露王猛
Owner 山东大树达孚特膳食品有限公司
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