JPS6262144B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing fruit juice from stone fruits such as dates and prunes.

Generally, turbidity such as fiber, crude protein, pectin, etc., and other impurities suspended in the crude extract (crude juice) obtained by extracting stone fruits, especially date fruits, with water or hot water are removed. It is very difficult to industrially separate the ultrafiltration membrane using ultrafiltration equipment, and although there are reports of excessive testing using ultrafiltration membranes, it is not economical.

In addition, Iraq is the main producer of date fruits.
When producing a series of fruit juices using these foreign date fruits as raw materials, the date fruits are generally imported packed in plastic bags weighing 25 kg or 50 kg. Due to the high concentration of sugar they contain, they are solidified into blocks inside the bag (semi-dried fruits with a sugar content of 65 to 70%), so they are crushed to a state suitable for sugar extraction. It has been industrially difficult to extract the crushed material. In other words, it is extremely inefficient to use stone crushers or manual labor to crush date blocks, and live steam is not used to bring the crushed material (date crops) into a state suitable for extraction. Due to the high pressure and high temperature heat treatment for a long period of time (1 to 2 hours), the PH of the product changes due to the use of live steam, and the Mellard reaction occurs due to the high pressure, high temperature and long time heating, which adversely affects the quality. It was also unfavorable in terms of yield.

The present inventor has achieved the present invention as a result of research into a method for industrially producing fruit juice from fruits such as dates and prunes of good quality in an efficient and economical manner while eliminating the above-mentioned drawbacks. .

An object of the present invention is to provide a method for continuous production of fruit juices such as dates and prunes and piure, which are excellent as raw materials for beverages, fermentation raw materials, seasonings, and the like.

In the present invention, raw fruits such as dates are crushed into a mud-like (magma-like) state by adding water or hot water using a micro radar, and then indirectly heated (80°C to 95°C) using a jacket-type courier. After deactivating enzymes and extracting sugar etc., the pulp is separated from seeds and other impurities using a seed pulper, and the crude pulp is separated using a finisher.
This is a method for producing concentrated fruit juice such as dates, which is characterized by sequentially treating the fruit juice with a check filter to separate fine pulp and other impurities, and then over-treating with a check filter and then concentrating and sterilizing the juice.

In the present invention, fruits such as dates refer to dates, prunes, and other similar fruits, and the raw fruit fruits are fresh fruits or are based on the packaging, and the fruits themselves stick to each other due to the high concentration of sugar contained in them and form clumps. This means that it is a fruit that has solidified into a block shape. When the starting material (raw material) is fruit that has been taken out of a plastic bag and has solidified into nodules, it is pretreated to make it into fine particles using a cutter equipped with a blade made of superalloy, etc. Preferably, fresh fruit is fed directly to the microradan. Moreover, the fruit juice such as dates obtained in the present invention means fruit juice such as dates and piure.

Next, embodiments of the invention will be described.

Example 1 Date fruits were continuously fed to a crusher (micro grader), and the dates were crushed while adding warm water (approximately 80°C) at a weight ratio of 1:1, and then put into a jacket. Continuously feed the crushed material into a molded fruit extractor, hold the crushed material at a temperature of about 92°C for about 15 minutes, perform enzyme deactivation and extraction, and then separate the seeds from the processed material. In order to make it suitable, the sugar concentration is adjusted to about 33° to ₃₅ ° B The date fruit juice liquid was obtained by fractionation.

The obtained juice was continuously fed into a finisher (0.5 mm diameter screen, 700 rpm) together with hot water.
After separating the coarse pulp, it is separated into fine pulp using a vibration separator and then processed into a spiral decanter (3.500 rpm).
The decanter pulp is further separated into the decanter pulp using the desludger, and the juice is stored in a tank. Ta. The final juice obtained is _B
It is preferable to adjust the angle to 23°.

The obtained juice was concentrated using a thin film vacuum concentrator in a conventional manner, adjusted to 70° _BX , and then sterilized and packaged to produce a product.

It is preferable that appropriate amounts of heated water be automatically added to the micro radar, seed pulper, and finisher from the same hot water tank.

Seeds separated by the seed pulper are washed with warm water and used as a raw material for activated carbon, and the washing water can be combined with the juice from which the seeds have been separated by the seed pulper, and the crude pulp separated by the finisher is The washing water is washed with warm water and used as feed material, and the washing water can be combined with the juice from which the coarse pulp is separated in a finisher.Furthermore, the fine pulp separated in a spiral decanter is used as food pulp for jam processing, etc. used for.

In addition, in the over-process (filter check),
The reflux of the permeated liquid is around 23 degrees, about 70 degrees.
Approximately 5000 per ^20m2 at ℃ is preferable.

Example 2 A large number of date fruits are solidified into block-like shapes due to high concentration of sugar and pectin, and are placed in a hopper and continuously transferred to a cutter using a conveyor. After crushing into solid bodies with a diameter of about 8 mm using the cutter, the solid bodies (date crops) were continuously fed into a crusher (micro grader) using an elevator, and then treated in the same manner as in Example 1. A clear date fruit juice liquid was obtained.

According to the present invention, fruit juice and piure can be continuously and efficiently extracted from fruits such as dates, which are rich in sugars such as fructose and glucose, as well as containing many vitamins and minerals, without causing the Melard reaction. It can be manufactured to

Claims (1)

[Claims] 1 Fruits such as dates that have been pre-treated or not pre-treated for cutting are crushed using a micro radar with the addition of heated water, then heat treated with a jacket-type courier, then heated water is added to the seed pulper. Seeds and impurities are separated to obtain juice, heated water is added to this, and a finisher separates the coarse pulp.Furthermore, a vibration separator, a decanter, a deslarger, and a filter are sequentially used to separate fine pulp and fine impurities. A continuous production method for fruit juice such as dates.