Method for transforming pentosan and dietary fiber by wheat bran enzyme engineering method

A wheat bran and dietary fiber technology, applied in the field of food processing, can solve the problems of low added value, etc., and achieve the effects of increasing dietary fiber content, increasing economic income, and large flexibility

Inactive Publication Date: 2009-12-23
HENAN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

At present, it is mainly used as fe

Method used

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Embodiment Construction

[0036]The wheat bran is first processed by a bran breaker, and then sieved through 80 mesh to remove the sticky flour in the bran, and then crushed through a 40 mesh sieve. After crushing, the bran is adjusted to pH 5 with dilute hydrochloric acid at a ratio of material to water of 1:6, and cell wall decomposing enzymes (xylanase, cellulase or pentosanase, 40u / 100mL) are added, and enzymatic hydrolysis at 45°C for 1 hour , Centrifugation, and then use an extruder to treat the wheat bran. On the one hand, the enzyme is inactivated, and on the other hand, the structure of the wheat bran is further loosened to facilitate subsequent extraction and separation. The expanded wheat bran is then crushed to 40 meshes. screen. Weigh 50g of crushed bran sample into a reactor equipped with a stirring device, add 250mL of water, 120u of cellulase, stir in a water bath at 45℃ for 1h, and then use saturated Ca(OH) 2 The solution was adjusted to pH=10 and stirred at 50°C for 2h; the reaction solut...

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Abstract

The invention discloses a method for simultaneously producing pentosan and dietary fiber by a wheat bran enzyme engineering method, belonging to the food processing field of the deep processing transformation of the food processing by-product. The method takes industrial wheat outer bran as raw material; after the moisture and the Ph of the industrial wheat outer bran are regulated, cell wall lytic enzyme is adopted for being acted on the wheat bran; and then a screw extruder is adopted for extrusion expansion treatment; alkali liquor, the Ph of which is equal to 10, is used for extraction; and extraction solution obtained by decentralization is deproteinized, concentrated, and dried in vacuum to obtain pentosan. Precipitant obtained by alkali liquor extraction and decentralization is decolorized by H2O2 solution, washed, dried and ground to obtain dietary fiber. The technology can simultaneously produce pentosan and dietary fiber, also can only produce pentosan or dietary fiber according to market demands, and is flexible. The obtained pentosan and dietary fiber can serve as addition agent and functional factors, and are applied to food, pharmaceutical industries and cosmetic industries, thus realizing the effective transformation and utilization of the wheat bran.

Description

Technical field: [0001] The invention relates to a method for producing pentosans and dietary fiber from wheat bran, relates to the intensive processing and comprehensive utilization technology of grain by-products, and belongs to the field of food processing. Background technique: [0002] Wheat bran is the main by-product of the processing of wheat into flour. The annual output of wheat bran in my country is about 25 million tons. At present, it is mainly used as feed, and the added value is very low. Wheat bran is rich in nutrients. If it can be effectively developed and utilized, it will be a huge asset. The content of pentosan in wheat bran is about 20%, the content of dietary fiber is about 40%, and the other contains about 15% protein and about 15% starch. Therefore, wheat bran is very important for preparing pentosan and dietary fiber. Good raw materials. Pentosans have an important effect on the baking quality of bread. Adding pentosans to flour can significantly improve...

Claims

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Application Information

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IPC IPC(8): C08B37/00C12S3/02A23L1/09A23L1/30A23L1/308A23L1/10A23L1/28A23L33/10A23L33/125A23L33/21
Inventor 郑学玲李利民张杰
Owner HENAN UNIVERSITY OF TECHNOLOGY
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