JP2002125582A - Method for processing oyster shell or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for efficiently processing or treating the bones or shells of animals or fishes and shellfishes so as to effect improved finish of the bones or shells. SOLUTION: This method for processing oyster shells comprises the following process: the oyster shells are pressurized in a humid or dry atmosphere at a temp. of >=100 deg.C and >=2 atm for a specified time and then depressurized to the atmospheric pressure for 5 s or longer, thereafter ground; owing to the above treatment, the oyster shells become soft and easy to ground. The resulting oyster shell powder has no sharp edge, being good in finish and safe in handling; furthermore the powder has been sterilized by heating, preventing the organic matter deposited thereon from putrefaction, and also the oyster shell powder itself has deodorant effect; owing to the active ingredients contained including lime components, nitrogen components, phosphate components, potassium components, manganese, iron and iodine, the powder serves as a fertilizer or soil conditioner and is also usable as a feed for animals including chickens and fishes or a food additive. By the way, the oyster shells include oyster shells, sea urchin shells, seashells, fish bones, fowl bones, pig bones and cattle bones.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing oysters and the like, and more particularly to a method for processing animal and fish bones and shells of crustaceans.

[0002]

2. Description of the Related Art Generally, oysters, shells, fish bones, chicken bones, cow bones, pig bones, and the like are sometimes finely ground and used as fertilizers and feeds as bone powder. Feed them,
Conventionally, when used as a fertilizer, for example, a method of directly crushing dried bones and shells has been adopted.

[0003]

However, such conventional processing and processing methods have the following disadvantages. That is, in the conventional method, the processing of the fish bone and the squid was not easy due to its hardness. It took time and effort to grind it finely. That is, the processing steps were complicated. Moreover, even if it was crushed, the crushed pieces had a sharp shape, and the finish was poor. In addition, the subsequent processing such as sorting and packing was adversely affected.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for processing bones and shells, which can efficiently process and process the same.

[0005]

According to the first aspect of the present invention, a shell of a crustacean or a bone of an animal is pressurized in a humidified atmosphere or a dry atmosphere at a temperature of 100 ° C. or more to 2 atm or more. This is a method for processing squid or the like, which includes a pressurizing step and a depressurizing step of reducing the pressure over a predetermined period of time. This decompression is performed slowly. For example, 10
Reduce the pressure for more than a second. Crustacean shells or animal bones include: That is, oyster shell, sea shell, shell, fish bone, chicken bone, pig bone, cow bone and so on.

According to a second aspect of the present invention, there is provided the method of processing oysters according to the first aspect, wherein the pressure is reduced to the atmospheric pressure in 5 seconds or more in the pressure reducing step. This is because if the pressure is rapidly reduced within a time of less than 5 seconds, the shells, bones, etc., which have been heated under pressure, burst or scatter.

According to a third aspect of the present invention, there is provided a process for processing oysters or the like according to the first or second aspect, further comprising a pulverizing step of pulverizing crustacean shells or animal or fish bones after the decompression step. Is the way. For the pulverization, a known pulverizer can be used. The shell and bone are softened by pressurization and heat treatment, and can be easily pulverized.

[0008]

According to the method for processing oysters and the like according to claims 1 to 3, oyster shells and the like can be softened, and subsequent processing such as pulverization can be performed extremely easily. Moreover, since the crushed pieces such as the crushed husk are soft, they have no sharp corners, have a good finish, and are safe in handling. Thus, the ground husk powder can be used mainly as chicken feed, and the ground cow bone can be used as bone meal fertilizer.

[0009]

Embodiments of the present invention will be described below. (First Embodiment) The squid was processed under the following conditions.
First, 3 kg of oyster husk was put into a pressure cooker, and 100 cc of water was added. Then, this was heated to 120 to 150 ° C., and the internal pressure of the pressure cooker was kept at 2 to 5 atm for 8 minutes. Thereafter, the heating was stopped and the pressure was reduced to atmospheric pressure over 10 seconds. The used oyster hulls are those obtained after removing the oysters, washed with water and dried. As a result, the husk was soft and very easy to grind. The pulverization was performed by a usual method using a pulverizer or the like.
Crush to a size of about 1 mm. At this time, the heating imparts a bactericidal effect and can prevent decay of attached organic matter. The ground husk itself also has a deodorizing effect. In the existing method, since the crushed pieces were crushed while being hard, the crushed pieces were shaped like glass pieces, and when used as animal feed, it would be dangerous if not reduced. In this embodiment, it is soft and can be pulverized into a rounded and rounded shape without danger.

[0010]

According to the present invention, oysters and the like can be easily softened. At the same time, the processing time can be reduced. In addition, processed oyster shells and fish bones can be handled safely. Therefore, it can be used safely as feed or fertilizer. In addition, when this dried and ground powder such as husks and cow bones are sprayed on fields, etc., the lime, nitrogen, phosphoric acid, potassium, and manganese, iron, iodine, etc. contained in the powder are effectively used. Ingredients are effectively absorbed from plant roots, and vegetables, rice,
It is effective for growing various plants such as wheat, flowers and lawns. In other words, the powder such as oysters can also be used as a soil conditioner. In addition, the flakes and powder such as squid according to the present invention contain minerals such as lime, and are not only plant fertilizers, but also feed for animals including chickens and fish, or as a food additive. Can also be used effectively.

Claims (3)

[Claims] 1. A pressurizing step of pressurizing crustacean shells or animal or fish bones in a humidified atmosphere or a dry atmosphere at a temperature of 100 ° C. or more and at least 2 atm. A method for processing oysters and the like, including a pressure reducing step of reducing pressure. 2. The method according to claim 1, wherein the pressure is reduced to atmospheric pressure in 5 seconds or more. 3. A pulverizing step for pulverizing crustacean shells, animal and fish bones and the like after the decompression step.
Or a method for processing a squid or the like according to claim 2.