CZ305351B6 - Method of obtaining fibrous material - Google Patents

Abstract

Lupine peelings, lupine cores or lupine meal are mixed with water, the pH thereof is adjusted under perpetual stirring to an alkali range of 8 to 8.5 and all is then heated until boil. The thus obtained suspension is then cooled down to a temperature in the range of 60 to 70 degC; enzyme for protein cleavage is added and under perpetual stirring protein is hydrolyzed to yield a solid fibrous filter cake. The filter cake is then washed, dried and ground. When obtaining fibrous material from ground cores of lupine beans or from lupine meal, also enzymes for liquefaction and saccharization of starch are added into the cooled down suspension. The pH adjustment is usually carried out by the use of potassium bicarbonate.

Description

Technical field

The invention relates to a process for obtaining fiber from lupine husks, lupine kernels or lupine flour.

BACKGROUND OF THE INVENTION

Fiber in the human diet is obtained predominantly by natural means, consumption of fruits, vegetables, cereals, etc. Targeted fiber extraction is usually carried out by drying and grinding fruits and various fruits in which the fiber is richly contained. One of the fruits rich in fiber is lupine, but the method of obtaining fiber alone from these fruits has not been known yet.

It is therefore an object of the invention to find a method by which this rich content of lupine bean fiber can be obtained while attaining high durability of the product obtained.

SUMMARY OF THE INVENTION

The object is achieved by the process of obtaining the fiber according to the invention, which consists in mixing the lupine husks, lupine cores or lupine flour with water, adjusting their pH to an alkaline range of 8 to 8.5 pH while stirring, After boiling and the resulting suspension is cooled to 60-70 ° C, the protein digestion enzyme is added and the protein is hydrolyzed while stirring to form a solid fiber filter cake which is washed, dried and ground. This method is used in particular in obtaining fiber from lupine skin.

In obtaining fiber from lupine kernels or from lupine flour, the starch liquefaction and saccharification enzymes are also added to the cooled suspension.

In a preferred embodiment, the pH adjustment is performed with potassium bicarbonate.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

Lupine beans were peeled on a peeling machine to obtain a separate shell fraction and a core fraction separately. The core fraction was ground and mixed with 30 parts of core and 70 parts of water, the pH was adjusted to an alkaline pH of 8.3 by addition of potassium bicarbonate, and the mixture was heated to boiling for one hour. Then the suspension was cooled to 70 ° C and NOVO Allcalase L was added to digest the proteins. After one hour, BAN LS, AMG 300 L enzymes were added to liquefy and saccharinate the starch while hydrolyzing the protein for two hours. At the end of this process, filtration was performed to separate the solid portion, which is the filter cake, which is predominantly dietary fiber. The obtained filter cake was washed, dried and ground.

Example 2

The peeled lupine husk fraction was ground and mixed with water at a rate of 30 parts of husks and 70 parts of water and left to stand for 2 hours. The pH was then adjusted to an alkaline range of 8.3 pH

By adding potassium bicarbonate while stirring, and the mixture was heated to boiling for one hour. Then the suspension was cooled to 70 ° C and NOVO Alcalase L was added to digest the proteins and hydrolyzed the protein with stirring for two hours. After completion of this process, filtration was performed. The solid portion, the filter cake is predominantly coarse fiber. The obtained filter cake was washed, dried and ground.

Example 3

Lupine flour or defatted lupine flour was prepared as a slurry with water in a ratio of 20 parts lupine flour to 80 parts water. After thoroughly mixing and adjusting the pH to an alkaline pH of 8.5 by the addition of potassium bicarbonate, the mixture was heated to boiling for one hour while saponifying the fats. Then, the suspension was cooled to 70 ° C and NOVO Alcalase L was added to digest the proteins, as well as BAN LS, AMG 300L enzymes to make the starch liquefied and saccharified. At this temperature, the enzymes were allowed to act for two hours while stirring. After completion of this process, filtration was performed. The solid part, the filter cake is predominantly coarse and dietary fiber. In the liquid phase, hydrolysed protein, saponified fats and liquid starch, which can be decomposed into sugar, leave. The obtained filter cake was washed, dried and ground.

PATENT CLAIMS

Claims (3)

Process for obtaining pulp, characterized in that the lupine husks, lupine cores or lupine flour are mixed with water, adjusted, with stirring, to an alkaline pH of 8 to 8.5 pH and heated to boiling, the resulting suspension The mixture is cooled to 60-70 ° C, the protein cleavage enzyme is added, and the protein is hydrolyzed while stirring to form a rigid fiber filter cake which is washed, dried and ground. Process according to claim 1, characterized in that starch liquefaction and saccharification enzymes are also added to the cooled suspension at a temperature of 60 to 70 ° C. Method according to claim 1 or 2, characterized in that the adjustment of the pH to the alkaline range of 8 to 8.5 pH is carried out with potassium bicarbonate.