JPS633765A - Production of solid feed - Google Patents

Abstract

PURPOSE:To produce a solid feed in a short drying time in high efficiency, without causing deterioration of quality by thermal degradation, by adding crushed ice to a feed at a specific weight ratio to moisten the feed and forming, solidifying and drying the moistened feed. CONSTITUTION:Crushed ice is produced e.g. by finely crushing ice block produced by ice-making. The crushed ice is added to a feed at an amount of 3-30wt% to moisten the feed and the obtained mixture is formed and solidified to provide the objective solid feed. Since the feed is moistened with crushed ice, the amount of water necessary for forming is nearly half of the amount in the case of using water for moistening. Accordingly, the heat-quantity required for drying the formed feed can be remarkably reduced and the drying time can be shortened. The solid feed produced by this process exhibits improved growth, decreased occurrence of diarrhea and loose passage compared with conventional feed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for efficiently producing solid feed without quality deterioration due to thermal denaturation of the feed.

Conventional blue and its problems Traditionally, feed has been solidified for the purpose of efficient use, and - generally, an extrusion granulation method using a ring pellet machine is used to solidify feed. has been done.

In this solidification method, the feed is moistened with steam, molded using the above method, and then cooled and solidified (pelletized).
It increases the hardness and durability of feed. However, this method has the problem that the feed is exposed to high temperatures due to the use of steam, resulting in thermal denaturation and loss of quality. In particular, in the solidification of compound feed for young animals, skim milk powder, wheat flour, sugars, etc. are used as feed ingredients, so they are easily susceptible to deterioration in nutritional and appearance (color) quality due to heat denaturation. There is also the problem that these raw materials become sticky when moistened with steam, making it difficult to solidify them.

In addition, in view of the drawbacks caused by steam humidification as described above, a method of manufacturing solid feed has been used in which humidification is performed using water instead of steam and molded. This method uses 5
After adding ~50% water and kneading, it is molded using a disc pelleter or other wet granulator, so there is no problem of quality deterioration due to thermal denaturation like steam humidification, and the product has a diameter of 0. There is an advantage that pellets with a small size of about .5m+/m to 3.5m/+m can be obtained. However, with this method, it is necessary to perform hot air drying to reduce the moisture content after molding, which inevitably causes the decomposition of vitamins and thermal denaturation of proteins in the solid feed, which is particularly important for feed for young animals. There are major nutritional problems.

Due to the above-mentioned situation, in the production of solid feed,
It is desired to work at as low a temperature as possible and shorten the drying time.

Problems to be Solved by the Invention The present invention was made for the purpose of solving the above-mentioned problems seen in the production of solid feed. The objective is to provide a method that can efficiently produce solid feed with minimal quality deterioration due to denaturation.

The present inventor succeeded in solving the above-mentioned problem by using crushed ice to humidify the feed raw material when solidifying the feed, and thus achieved the present invention.

The structural feature of the present invention is that 3 to 30 g of crushed ice is added to the feed.
The method consists of adding % by weight, mixing, and molding and solidifying the mixture.

The term "crushed ice" as used herein refers to block-shaped ice obtained by ice making, which has been made into a fine form, with a particle size of 3. O1
It is preferable to use ice crushed to a size of about l/m or less, or ice made into flakes with a thickness of 0.5 to 3.5 m/+a using a flake ice maker or the like.

Means for Solving the Problems The present invention humidifies the feed by adding 3 to 30% by weight of crushed ice to the feed, and the above-mentioned amount varies depending on the type of feed used. Adjust the amount of crushed ice added within the range.Please note that the amount of crushed ice added is 3% by weight.
If it is lower than this, it will be difficult to mix the feed uniformly, and if it is more than 30% by weight, it will be unfavorable because molding will be poor or drying will take time after molding.

In the present invention, by humidifying with crushed ice, the amount of humidification required for forming (granulating) feed is approximately half that of water, so the amount of heat required for drying after forming is greatly reduced.
Therefore, the drying time is also shortened.

In addition, by using crushed ice, the increase in product temperature due to friction between the feed and the granulator during kneading and molding is suppressed, which reduces the drying time mentioned above and prevents thermal denaturation of the feed. It is possible to suppress quality deterioration due to Furthermore, when crushed ice is added, the feed is mixed more uniformly than when water is added, so pellets after molding can be obtained that are superior in both hardness and durability.

EXAMPLES The present invention and its effects will be specifically explained below with reference to Examples.

Example 1 A feed for young pigs having the following composition was solidified by the following procedure.

Feed composition ratio Raw materials Combination ratio (wt%) Skimmed milk powder
40 Wheat'FA41 Grape I! 10 Fishmeal 5 Oil 2 Vitamins, minerals 2 Add 5 wt% of crushed ice to the feed with the above mixing ratio (moisture 10%), mix uniformly, and mix this mixture (product temperature 20%).
°C) using a disc pelleter with a screen hole diameter of 1.5 g + / m and a screen thickness of 1.5 m / m,
Then, it was dried by hot air drying until the moisture content was 10%.

For comparison, water was added to the same feed as above at 104%.
The added and mixed mixture was molded and dried in the same manner as above.

Table 1 shows the results of a comparison of the degree of rise in product temperature after molding, the time required for drying, the properties of solid feed (pellets), etc. for both.

Example 2 Using a feed having the same composition as that used in Example 1, a mixture obtained by adding 3i+t% of crushed ice to the feed was prepared using a die hole diameter of 3. The pellets were molded using a ring-type pelletizer having a counterpore die with a die ring of 35 m/m, a die ring of 35 m/m, and a effective force of 1) 0 m/m, and then dried with hot air until the moisture content was 10%.

Further, as a comparative example, a mixture of 5 wt % water added and mixed in place of the above-mentioned crushed ice product was molded and dried in the same manner.

Table 2 shows the results of comparisons made in the same manner as in Example 1 for each of the obtained solid feeds.

Example 3 A feed for young fish having the following composition was solidified by the following procedure.

Feed composition ratio Raw materials Combination ratio (wt%) Fishmeal
60 Wheat flour 30 Soybean meal 5 Feed yeast 4 Vitamins, minerals 1 Add and mix 15 wt% of crushed ice to the feed with the above mixing ratio (moisture 10%), and mix this mixture into a screen with a pore size of 2. It is molded using a wet granulator with a screen thickness of 2.0+a/m, and then dried with hot air to reduce the moisture content to 10%.
It was dried until.

In addition, as a comparative example, 25% of water was added instead of the above crushed ice.
The mixture with wt% addition was molded in the same manner and dried.

Both obtained solid feeds were compared in the same manner as in Example 1, and the results are shown in Table 3.

Example 4 This example shows the results of a rearing test conducted on each test group consisting of 25 piglets aged 3 weeks old using each solid feed obtained in Examples 1 and 2 and Comparative Examples 1 and 2. This is what is shown. The results are shown in Table 4.

1) F and Mars As seen in the test results shown in the above examples, the drying time of the solid feed produced according to the present invention after molding is significantly longer than that of the conventional method of humidifying with water. Also, the properties of the pellet obtained by solidification are excellent.

Furthermore, in a rearing test using the solid feed according to the present invention, there are advantages in that growth is better and the incidence of diarrhea and loose stools is lower than that of conventional feeds.

Claims (1)

[Claims] (1) A method for producing solid feed, which comprises adding 3 to 30% by weight of crushed ice to feed, mixing the mixture, and molding and solidifying the mixture.