JPS61231979A - Extraction of protein and vitamins from earthworm - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION The present invention relates to a method for extracting proteins, vitamins and minerals from worms.

[Prior art]

Worms contain large amounts of protein, vitamins, and minerals, and have long been used not only as a health food but also as an antipyretic and diuretic.

However, worms are elongated and live by ingesting decayed plant matter in the soil, so their bodies contain impurities such as soil and decayed plant matter.

Such impurities are difficult to remove, and conventionally, worms were taken with the impurities still in the body, which was extremely unsanitary.

[Purpose of the invention]

The present invention was made in order to eliminate such conventional drawbacks, and an object of the present invention is to provide a method for hygienically extracting proteins, vitamins, etc. from worms.

[Structure of the invention]

The present invention, which achieves the above object, comprises a first step of leaving worms in apple juice to cleanse internal organs by expelling impurities in the worm's body, and drying the worms obtained in the first step. A second step of pulverizing the powder, leaving the powder in acidic water, adding an alkali, stirring and filtration to obtain a filtrate and a filtrate; and a fourth step of vacuum drying the filtrate obtained in the second step and the third step.

The present invention consists of four steps.

In the first step, the worms are left in apple juice. The acidity (pH) of apple juice is the most suitable for worms, so worms eat apple juice and expel impurities such as dirt and rotting plant matter from their bodies, cleansing their internal organs.

The time for leaving the worm in the apple juice can be selected as appropriate until the worm sufficiently expels impurities from the body and the internal organs become clean, and is, for example, 24 hours.

In addition, instead of apple juice, it is also possible to use an acidic feed that has the same acidity as apple juice.

Next, in the second step of the present invention, the obtained in the first step,
The worm whose internal organs have been cleaned is dried and ground into a powder, and this powder is added to acidic water and left to stand, then the alkali is removed, stirred, and filtered to obtain a filtrate and a filtrate.

By adding worm powder to acidic water, about 85% of the worm protein is extracted, and by making this water alkaline again, 90 to 95% of the protein is separated.

As the acidic water, an aqueous solution of an inorganic acid or an organic acid is used, and its pi is in a weakly acidic range, usually pH 6 to 7,
Preferably it is about pus, s.

The time for leaving in acidic water is not particularly limited, and can be selected as appropriate, for example, from 1 to 2 hours.

As the alkali added to acidic water, caustic soda and soda carbonate are used, but the alkali is not limited to these, and water-soluble inorganic alkali salts are generally used.

Further, the pH after addition of the alkali is not particularly limited as long as it is within the alkaline range, and the stirring time can also be appropriately selected, for example, from 1 to 2 hours.

After such treatment, it is filtered to obtain a filtrate and a filtrate.

This filtrate contains most of the proteins, vitamins, minerals, calcium, phosphorus, iron, etc. separated from the worms.

Furthermore, in the third step of the present invention, the filtrate separated in the second step is made acidic again and then filtered to obtain a filtrate.

For acidification, an inorganic acid or an organic acid is usually used, and the pH after acidification is usually 4 to 5, preferably 4.
5 to 4.6.

The filtrate obtained in this third step is a residual extract that was not extracted in the third step, and is usually obtained by coagulating proteins and the like.

Finally, in the fourth step, the filtrate obtained in the second and third steps is preferably washed with water and then vacuum-dried.

As a result, an extract rich in proteins, vitamins, minerals, etc. is obtained, and approximately 95% of the essential components of the worm can be recovered.

〔Effect of the invention〕

As described above, according to the present invention, proteins, vitamins, etc. are extracted after removing soil and decaying plant matter from the worm's body, which is not only extremely hygienic but also allows for long-term storage. It is possible.

In addition, this extract is not simply powdered worms, but uses a chemical extraction method, so it is rich in protein, vitamins, etc., and is suitable as a nutritional food.

Hereinafter, the present invention will be explained step by step with reference to Examples.

〔Example〕

First step: 3 kg of washed worms were placed in a container along with 100 g of apple juice and left for 24 hours.

The worm ingested the acidic apple juice and vomited out the impurities in its internal organs, cleansing its internal organs.

2nd process The worms treated in the first step were dried and powdered.

On the other hand, add hydrochloric acid to water 3 to 4 times the amount of this powder to adjust the pH.
This powder was added to a solution whose pH was adjusted to about 6.5, and after being left for about 1 hour, caustic soda was further added to make it alkaline, followed by stirring for 1 hour and filtering.

Through this filtration, approximately 80% of the proteins, vitamins, minerals, phosphorus, iron, etc. contained in the worms were separated as a filtrate.

Third step: After the filtrate was separated in the second step, hydrochloric acid was again added to the filtrate to adjust the pH to 4.5 to 4.6, and the mixture was filtered.

As a result, remaining proteins, vitamins, etc. were separated as a filtrate.

The filtrate obtained in the fourth step and above was washed and dried under vacuum to obtain an extract rich in proteins, vitamins, etc.

Claims (1)

[Claims] The first step is to leave the worms in apple juice and cleanse the internal organs by expelling impurities inside the worms.The worms obtained in the first step are dried and powdered, and this powder is placed in acidic water. a second step of adding an alkali after standing, stirring and filtering to obtain a filtrate and a filtrate; a third step of making the filtrate of the second step acidic and then filtering to obtain a filtrate;
A method for extracting proteins and vitamins from worms, the method comprising the following steps: and a fourth step of vacuum drying the filtrate obtained in the third step.