JPS63148980A - Production of spongy grain wastage pellet - Google Patents

Abstract

PURPOSE:To obtain the titled pellets, having excellent air permeability, lighting, water holding properties without collapsing of shape and useful as a culture medium for microorganisms, etc. at a low cot, by blending grain wastage with a large amount of water and small amount of impasted grain flour and starch, etc. CONSTITUTION:100pts.wt. grain wastage, e.g., bran, etc., is blended with a large amount of water, e.g. >=40pts.wt., expressed in terms of the amount of added water and a small amount of one or more of impasted grain flour, e.g. wheat flour, etc., and starch, e.g. corn starch, etc., in a mixer, etc., and extrusion molded using a pelletizing machine, etc., to provide pellets, which are then put in a drying chamber at 80 deg.C for 30min, taken out, allowed to stand for a whole day and night and dried to afford the aimed spongy grain wastage pellets. Furthermore, the amount of the impasted grain flour and starch, etc., added is preferably <=25pts.wt.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to a method for producing spongy grain pellets used as a culture medium for S* of various fungi. The present invention relates to a method for producing pellets that float on water, are porous and spongy, have a large surface area, have excellent water permeability and water retention, and do not easily lose their shape in water.

<Prior Art> Conventionally, bran pellets of this type have been formed extremely hard for the purpose of rational storage and transportation.

For this reason, it has a high specific gravity and is dense, and has had problems such as sinking immediately when placed in water, and immediately losing its shape if left in water.

<Problems to be solved by the invention> As mentioned above, in order to utilize bran's properties of 41 fibers and water retention as a culture medium for fungi, it is difficult to use bran in its powdered form due to its poor air permeability. The pellets produced using conventional methods are too hard and have poor permeability, and lose their shape when exposed to water. or,
A swelling method is used to produce porous materials with a specific gravity that allows them to float on water, but this requires the addition of a large amount of starch (more than 30%), which takes advantage of the properties of bran. Therefore, it could not be used for applications requiring low starch content.

<Means for Solving the Problems> The present invention produces bran pellets that have properties completely different from the conventionally produced pellets as described above, that is, they are porous and spongy, have excellent permeability, and water retention. The purpose is to produce bran pellets that do not easily lose their shape even in water, and by adding a large amount of water and a small amount of flour or starch (25!1 parts by weight or less per 100 parts by weight of bran). This method has been completed to industrially produce large amounts of bran pellets.

<Example> The present invention will be described in detail below.

The feature of the present invention is that 40! ! Adding a large amount of water in an amount of at least 60 to 100! parts (preferably 60 to 100! parts);
One or more types (2 or more) selected from wheat flour and starch
(5 parts by weight or less, preferably 5 to 25 parts by weight) is added after gelatinization, thereby making it possible to obtain bran pellets that are spongy, have water-retaining properties, and do not easily lose their shape in water. .

If the amount of water added is outside this range, it is impossible to produce bran pellets with the above properties.

Drying in the method of the present invention may be performed by natural drying at room temperature, but preferably heated to 70° C. or higher, and more preferably dried until the final moisture content of the pellets is 15% or less.

In addition, the gelatinized flour or starch to be added can be prepared by dissolving the flour or starch in the required amount of water in advance and gelatinizing it by heating, or by adding it to a mixture of flour or starch with bran. This refers to a method in which hot water or steam is added in an amount of water (40 parts by weight or more, preferably 60 to 100 parts by weight) and gelatinized by heating and kneading.

Examples of grain flours to be used include wheat flour, rice flour, corn flour, etc.; examples of starches include small 21 flour, rice starch, corn starch, tapioca starch, potato starch, sweet potato starch, and modified starches thereof (gelatinized starch). ), but in the present invention, among these flours and starches, it is most preferable to use wheat flour in terms of its effectiveness.

Also, the particle size of the bran used varies depending on the size of the pellets, but the coarser the particle size structure, the better.
% or less, and preferably 50% or more of 1000μ or more.

The molding machine used for molding may be an extrusion molding machine, for example, but any machine that can mold such highly hydrated bran may be used, and germs and other nutrients may be added to add value. I can do it.

Eight examples of the manufacturing method of the present invention will be described below.

Example 1 To 100 parts by weight of bran with a particle size of 1.6M or more, 5 parts by weight of wheat starch dissolved in 80 parts by weight of water and gelatinized by heating were added, mixed for 3 minutes with a mixer, and extruded with a pellet machine. to make a pellet of 7rtmφ x 25M, put it in a drying room at 80℃ for 30 minutes, then took it out and
It was left to dry day and night.

Example 2 10 parts by weight of wheat flour is dissolved in 80 parts by weight of water for 100 parts by weight of bran with a particle size range of 2% less than 0.6 darkness, 8% 0.6 to 1.0 darkness, and 90% of 1 darkness or more. The mixture was heated and gelatinized, kneaded for 3 minutes using a kneader, and extruded using a pellet machine to produce 8 MIφX 2.5 dark pellets. (Pellet machine rotation speed 16OR/M, supply 1660/Hr1 load current 55A) 10
The product was dried in a hot air dryer at 0° C. for 40 minutes to obtain spongy bran pellets with a product moisture content of 10%.

Example 3 Add 10 parts by weight of wheat flour to 100 parts by weight of bran with a particle size distribution of 90% over 1 darkness, and mix it to 1 liter.
After 3 minutes, 60 parts of water at 98°C were added, mixed for an additional 3 minutes, extruded in a pellet machine, and dried in the same manner as in Example 1.

Example 4 In the same manner as in Example 3, Φ of water was adjusted to 40 parts by weight.

Example 5 In the same manner as in Example 3, Φ of water was adjusted to 20 parts by weight.

Example 6 Add 12 parts by weight of water to 100 parts by weight of bran with a particle size distribution of 50% under 0.6 open mold and 10% over 1 #1, mix for 3 minutes with a mixer, extrude with a pellet machine, Example It was dried in the same manner as 1.

Effects> As described above, the method for producing pellets according to the present invention is low in cost, and when used as a culture medium, the pellets are porous and spongy and have sufficient air permeability and light absorption by ensuring voids. Moreover, the moisture retention of the grain cake improves water retention, and the nutrients contained in the grain cake and flour or starch provide pellets that are ideal for culturing fungi.

Claims (4)

[Claims] (1) Mixing 100 parts by weight of grain cake with 40 parts by weight or more of water and a small amount of one or more selected from gelatinized grain flour and starch, shaping, and then drying. A method for producing spongy grain pellets characterized by (2) A method for producing spongy grain cake pellets according to claim 1, wherein the grain cake is bran. (3) The method for producing spongy grain pellets according to claim 1, wherein one or more selected from grain flour and starch is wheat flour. (4) 1 selected from mixed gelatinized flour and starch;
The method for producing spongy grain meal pellets according to claim 1, wherein the amount of the seed or two or more is 25 parts by weight or less.