JP4131689B2 - Method for producing algal salt - Google Patents

Description

The present invention is a so-called seaweed extract components contained in seaweed relates to a process for the preparation of algae salt taken into brine, more particularly, it captures the seaweed extract and efficiently extracted, well quality mineral balance stable algae salt It relates to a manufacturing method.

  In the past, so-called algal salt containing seaweed extract in salt is obtained by applying seawater to seaweed to deposit salt, baking it, dissolving it in water, and simmering the supernatant. Conventionally, as a method for producing the algae salt, a brine production process for producing saltwater-enriched brine by repeatedly contacting seawater and seaweed to evaporate water in the seawater, and brine obtained by concentrating the obtained brine A concentration step, a step of dissolving algae ash in which algae ash incinerated with seaweed is added to the concentrated brine, and a step of filtering the algae ash-dissolved brine to obtain a seaweed extract-containing brine, and the obtained seaweed extract Some have a simmering step for simmering the contained brine, a dehydration step for separating water from the mixture obtained in the simmering step, and a calcination salt step for heating and recovering the dehydrated salt obtained in the dehydration step as algal salt (For example, see Patent Document 1).

The one described in Patent Document 1 has the following problems.
(1) Since seawater is used as a raw material, bittern components such as magnesium remaining in seawater remain, and the obtained algal salt exhibits a bitter taste. Therefore, if the above-mentioned bittern component is removed by dehydration after extracting the seaweed extract, a part of the extract component is lost together with the bittern, resulting in a decrease in extraction efficiency from the seaweed.

  (2) Algae ash is dissolved in brine and then filtered to remove insoluble matter. However, since alga ash is fine, it is necessary to use, for example, Celite filtration or a fine filter for the above filtration. . However, organic components such as alginic acid extracted from kombu and mozuku have a high viscosity, so it is not easy to filter with fine filters, and these organic components are also removed during filtration, resulting in seaweed. The extraction efficiency of is reduced.

  (3) When seawater is circulated and poured into the algae branch, the seawater comes into contact with the seaweed while being gradually concentrated. However, when the salinity concentration is different, the amount of seaweed extract extracted varies depending on the osmotic pressure. For this reason, the extraction amount of the seaweed extract is not constant, and the quality of the obtained algal salt tends to vary.

JP 11-253126 A

The present invention is to solve the above takes the seaweed extract and efficiently extracted, and technical object to provide a method for producing mineral balance is good quality stable algae salt.

In order to solve the above problems, the present invention is configured as follows, for example, based on FIGS. 1 to 3 showing an embodiment of the present invention.
That is, the invention according to claim 1 relates to a method for producing algae salt, an extraction in which 5 to 60 parts by weight of seaweed is poured into salt water prepared by dissolving 100 parts by weight of purified salt in water and adjusted to a predetermined concentration, and immersed for a predetermined time. The step (1), the separation step (2) in which the seaweed mixed solution after the immersion is filtered and separated into the seaweed extract-extracted brine and the extraction residue, and the extraction residue is incinerated to be carbonized and obtained. Mineral recovery step (3), in which water is added to alga ash to dissolve minerals contained in the alga ash, and then insoluble matter is removed to obtain a mineral solution, and the above mineral solution is separated from the above-described separation step. A mixing step (4) for mixing with the seaweed extract-extracted salt water obtained in step 1 and a drying step (6) for recovering solids by evaporating water from the mixed solution obtained in the mixing step (4). It is characterized by that.

  The invention according to claim 2 relates to a method for producing algal salt, an extraction step in which 100 parts by weight of purified salt is dissolved in water and 5 to 60 parts by weight of seaweed is poured into the salt water prepared to a predetermined concentration and immersed for a predetermined time ( 1), a separation step (2) in which the seaweed mixed solution after immersion is filtered and separated into seaweed extract-extracted brine and extraction residue, and the extraction residue is incinerated and carbonized, and the resulting algal ash Seawater extract obtained by the mineral recovery step (3) obtained by adding water to the alga ash to dissolve minerals contained in the alga ash and then removing the insoluble matter to obtain a mineral solution, and the separation step (2) above. A drying step (6) for recovering solids by evaporating water from the extracted salt water, and extracting the mineral solution recovered in the mineral recovery step (3) of the previous production cycle with the extraction step (1) And mixed with salt water.

According to the present invention, it is an algal salt in which a component contained in seaweed is incorporated in salt, and the calcium component contained is 0.4% by weight or less, the potassium component is 10.0% by weight or less, and the magnesium component is 0.5% by weight. % Or less algal salt can be obtained.

  In the above extraction step, salt water is prepared at a predetermined concentration, and a predetermined amount of seaweed is immersed in the predetermined time, so that the extraction amount of seaweed extracts such as glutamic acid and alginic acid contained in the seaweed into the salt water is stabilized. . And the mineral etc. in the seaweed which could not be extracted by this extraction process are collect | recovered from an extraction residue by a mineral collection | recovery process, and are taken in into salt water. Therefore, all the extracts that can be extracted from the seaweed, such as organic components and minerals contained in the seaweed, are taken into the algal salt obtained by drying the salt water in a balanced manner.

  In the extraction step, the higher the concentration of the purified salt, the easier the seaweed extract is extracted from the relationship of osmotic pressure, and the less the amount of water evaporated in the drying step, the lower the energy cost. However, if the salinity is too high, it becomes supersaturated and a salt that cannot be dissolved is deposited. On the other hand, if the salinity is too low, there is a risk of spoilage during immersion in seaweed. Therefore, the salt concentration of the above-mentioned salt water is preferably set to 15 to 35% by weight, and more preferably set to 15 to 25% by weight.

  The extraction process can be repeated as an additional extraction process after the separation process. That is, the present invention further includes one or a plurality of additional extraction steps in which fresh seaweed is introduced into the seaweed extract-extracted salt water separated in the separation step and immersed for a predetermined time, and the seaweed after immersion in the additional extraction step You may perform the said isolation | separation process again to a liquid mixture. Thereby, content of the seaweed extract component contained in a seaweed extract extract can be raised significantly.

  As the seaweed to be added to the salt water in the above extraction step or additional extraction step, edible seaweeds such as kombu, seaweed, cypress, hondawald, mozuku and the like can be arbitrarily used. These seaweeds may be used as they are or after being cut to an arbitrary size, but if they are cut to a size of 100 mm or less, the contact area with salt water will increase and extraction will be efficient. The residue is preferably incinerated because it can be incinerated in a short time. In addition, it is more preferable that this cutting dimension is 50 mm or less. For example, it is more preferable to cut to a dimension of 20 mm or less, such as a length of 15 mm and a width of about 3 to 5 mm.

  In the above separation process, if the filter medium is rough, seaweed cocoons are mixed into the seaweed extract-extracted salt water, which is the filtrate, and a defective product may be produced in the drying process. On the other hand, seaweed extract-extracted salty water has a high viscosity due to the seaweed extract's slime, etc., and if the filter medium is too fine, it takes a long time to filter, and part of the organic components cannot be filtered. Extraction efficiency decreases. Therefore, in the separation step, it is preferable to use a 140 to 250 mesh filter medium, and it is more preferable to use a filter medium having a mesh of about 200 mesh (aperture 74 μm).

In the above drying step, a fine powdery algal salt can be obtained according to the spray drying method, and this finely powdered algal salt is excellent in solubility, adhesion to snacks, etc., and more preferable because it can be applied to a wide range of applications. . However, in the present invention, in the above drying step, for example, the moisture is concentrated to about 15%, dried by a vacuum freeze drying method or a hot air drying method, pulverized and powdered, and other drying methods are used. Also good.
If the liquid to be dried to be dried in the above drying step is homogenized in advance with a stirrer such as a homogenizer, seaweed extract and salt are uniformly mixed and the viscosity of the liquid to be dried decreases. The dry method is more preferable because the droplets become finer, and the amount of salt attached to the inner surface of the drying device is reduced to improve the yield.

The algal salt can increase the content of the seaweed extract component by repeating the additional extraction step, but conversely, by reducing or omitting this additional extraction step, the mineral component contained in the algal salt, That is, each content of a calcium component, a potassium component, and a magnesium component can be suppressed low.
Of the mineral components contained in the algal salt of the present invention, the potassium component is preferably kept at a low level of 8.0% by weight or less, more preferably at a level of 5.0% by weight or less. Further, it is more preferable that the magnesium component is suppressed to 0.4% by weight or less.

  Since the present invention is configured and operates as described above, the following effects can be obtained.

  (A) Since seaweed is immersed in salt water prepared at a predetermined concentration, the extraction amount of seaweed extracts such as organic components extracted from seaweed has little variation, and a stable quality algal salt can be obtained.

  (B) Since salt water obtained by adding water to purified salt is used, the obtained algal salt does not exhibit a bitter or metallic taste due to bittern components contained in seawater, unlike the above-described conventional technology. Furthermore, since the process which removes a bittern component from salt water is unnecessary, the seaweed extract taken in salt water is not lost by this bittern component removal process.

  (C) Algae ash obtained by incineration of the extraction residue after the extraction process is not directly dissolved in salt water containing seaweed extract, but once dissolved in water to remove insoluble matters, mixed with salt water Therefore, fine insoluble matter can be efficiently removed with a fine filter or Celite filtration. Moreover, there is no concern that the seaweed extract in the salt water will be removed when the insoluble matter is removed, and the content of the seaweed extract taken into the salt water can be kept high.

  (D) Organic components such as glutamic acid and alginic acid contained in seaweed are taken into salt water in the extraction process, while minerals contained in the extraction residue that could not be extracted in the extraction process are recovered in the mineral recovery process. Since it is mixed with salt water, the whole organic component and mineral contained in seaweed can be efficiently taken into the salt water, and algae salt with a good component balance can be obtained.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a flowchart of a method for producing algal salt, showing a first embodiment of the present invention.

  As shown in FIG. 1, this algal salt production method uses purified salt, water, and seaweed as raw materials, dissolves the purified salt in water to prepare a predetermined concentration of salt water, and soaks seaweed in the salt water for a predetermined time. The step (1), the separation step (2) in which the seaweed mixed solution after the immersion is filtered and separated into the seaweed extract-extracted brine and the extraction residue, and the extraction residue is incinerated to be carbonized and obtained. Mineral recovery step (3), in which water is added to alga ash to dissolve minerals contained in the alga ash, and then insoluble matter is removed to obtain a mineral solution, and the above mineral solution is separated into the separation step A mixing step (4) for mixing with the seaweed extract extracted salt water obtained in (2), a drying preparation step (5) for sterilizing and homogenizing the mixed solution obtained in this mixing step (4), and this prepared mixing A drying step (6) in which the liquid was dried with a spray dryer to recover a fine powdery solid, and the obtained And a finishing step (7) in which the fine powder is sieved to finish the algal salt.

Next, taking the case of using kombu as the seaweed, the above-described production steps will be described in detail.
First, in the extraction step (1), 6 kg of purified salt was dissolved in 18 kg of water to prepare a salt water having a salt concentration of 25% by weight, and 1.2 kg of kombu was added to this salt water and immersed for 18 hours. As the above-mentioned comb, a length previously cut to about 15 mm and a width of about 3 to 5 mm was used. However, in this invention, you may use what was cut into the bigger dimension of about 100 mm or less, for example, and also you may use the seaweed which is not cut. In addition, since the above-mentioned added kombu absorbs salt water, it is preferable to suppress the amount of salt input to the extent that all the kombu is immersed in salt water.

  Next, the salt water in which the above-mentioned kombu is immersed is first roughly filtered through a 140-mesh filter in the separation step (2), and then filtered using a 200-mesh filter (aperture 74 μm). It was separated into seaweed extract extracted brine and about 4.2 kg of extraction residue. Comb extract is extracted from the above salt water, and the viscosity is high, so if a fine filter is used, it will be difficult to filter, but if the filter is rough, the koji of the kombu may be mixed into the filtrate. It is preferable to use a filter of about 200 mesh.

In this extraction step (1), the water content of the extraction residue is reduced to facilitate carbonization, which will be described later, and the salt and seaweed extract contained in the extraction residue are recovered as much as possible. It is preferable to apply the treatment. The water recovered by the dehydration treatment is filtered through a 200 mesh filter in the same manner as the salt water in which the kombu is immersed, and the filtrate is returned to the seaweed extract-extracted salt water.
The extraction residue is preferably washed with water, and the washing liquid obtained by this washing treatment is filtered through a filter and then added to the seaweed extract-extracted salt water.

Next, the above extraction residue is incinerated by heating to 500 to 800 ° C. in the mineral recovery step (3) and carbonized to 0.96 kg of algal ash. 2.4 kg of water is added to this algal ash and heated to about 80 ° C., the mineral components contained in the algal ash are dissolved, filtered through a filter cloth, fine insoluble matters are removed by Celite filtration, and 2. 6 kg of mineral solution was obtained. If the amount of water added to the algal ash is large, the amount of water evaporated in the drying step (6) described later increases, resulting in an increase in cost. For this reason, although it is preferable that said amount of hydration is small, salt content is also contained in said mineral solution, When solid amount is too small, solid content, such as salt and a mineral, may not fully melt | dissolve. For this reason, said amount of hydration is adjusted so that the solid content contained in a mineral solution may be 25% or less.
In this embodiment, the insoluble matter is removed by filtration through a filter cloth and then through celite filtration, but the mineral recovery step of the present invention is replaced by, for example, celite filtration after natural sedimentation. The mineral solution may be obtained by removing the insoluble matter by other methods.

  Next, the mineral solution is mixed with the seaweed extract extracted brine obtained in the separation step (2) in the mixing step (4). This mixed solution is sterilized by heating to 80 ° C. in the next drying preparation step (5), and lowers the viscosity of the mixed solution. Next, the mixture is stirred and homogenized with a homomixer or homogenizer to uniformly mix the kombu extract and the salt, and further reduce the viscosity. These treatments are not always necessary, but by applying these treatments, the kombu extract is uniformly dispersed, so that the quality is improved and the amount of adhesion to the apparatus is reduced during the drying of the next process, yield. Will improve. In addition, when there is a possibility that foreign matter is mixed in each of the above steps, the mixed liquid is further filtered through a filter of about 100 mesh (mesh size: 149 μm) to remove these foreign matters.

  Next, in the drying step (6), the prepared mixed liquid is dried at 180 to 200 ° C. by a spray drying apparatus, and a solid content in a fine powder form is recovered. At this time, the higher the drying temperature, the higher the yield. This is probably because the drying speed is increased and the amount of adhesion to the apparatus is reduced. In addition, as said spray drying apparatus, although an atomizer may be a rotary disk type thing, a pressure nozzle type thing may be used and it is not limited to a specific type thing.

  Finally, in the finishing step (7), the fine powdered solid content is sieved with a 32 mesh (aperture 500 μm) sieve to remove clumps, thereby removing 5.44 kg of fine powdered algal salt. Obtained. In the finishing step (7), the above-mentioned finely powdered algal salt may be formed into granules using a granulator as necessary.

  The obtained algal salt had no bitterness or metallic taste due to the bitter melon component and had a umami characteristic of kombu. As a result of analyzing the components contained in the algal salt, the calcium component was 0.0907% by weight, the potassium component was 1.52% by weight, and the magnesium component was 0.139% by weight. Moreover, the fine powdery algal salt is fine and finely particulate, has excellent solubility and adheres well to snacks and the like, and can be applied to various uses.

  In said embodiment, algal salt was manufactured using 20 weight part kombu with respect to 100 weight part of refined salt. However, in the present invention, for example, 60 parts by weight of the kombu can be used with respect to 100 parts by weight of the purified salt. In this case, the component of the algal salt obtained by the same treatment as described above has a calcium component of 0.131% by weight. The potassium component was 4.006% by weight and the magnesium component was 0.218% by weight.

FIG. 2 is a flowchart of a method for producing algal salt, showing a second embodiment of the present invention.
In said 1st Embodiment, the mineral solution collect | recovered at the mineral collection | recovery process was mixed with the seaweed extract extraction salt water at the mixing process of the manufacturing cycle. However, in the present invention, the above-described mineral solution may be mixed with seaweed extract-extracted brine in a subsequent production cycle.
That is, in the second embodiment, as shown in FIG. 2, the seaweed extract-extracted salt water obtained in the separation step (2) contains the mineral solution recovered in the mineral recovery step (3) of the previous manufacturing cycle. Is mixed in the mixing step (4), while the mineral solution recovered in the mineral recovery step (3) of this manufacturing cycle is mixed with the seaweed extract extracted brine in the mixing step (4) of the next manufacturing cycle. . Other configurations are the same as those in the first embodiment described above, and are processed in the same manner, and thus the description thereof is omitted.

  In this second embodiment, it is not necessary to leave the seaweed extract-extracted salt water separated in the separation step (2) until the mineral recovery step (3) is completed, so that the time of each production cycle can be shortened. Manufacturing efficiency can be increased.

FIG. 3 is a flowchart of a method for producing algal salt, showing a third embodiment of the present invention.
In this third embodiment, as shown in FIG. 3, the mineral solution recovered in the mineral recovery step (3) of the previous manufacturing cycle is mixed with salt water in the extraction step (1). The mineral solution recovered in the mineral recovery step (3) is mixed with salt water in the extraction step (1) of the next production cycle. For this reason, the seaweed extract-extracted brine obtained in the separation step (2) is immediately treated in the drying preparation step (5) as it is. Other configurations are the same as those in the second embodiment and are processed in the same manner, and thus the description thereof is omitted.

  In this 3rd Embodiment, since a mineral solution is mixed with salt water by an extraction process (1), a part of seaweed extracts, such as a mineral, are adsorbed | sucked to an extraction residue at a separation process (2), and are taken in into salt water. There is a possibility that the amount of seaweed extract will decrease. However, since the seaweed extract-extracted salt water separated in the separation step (2) is immediately processed as it is in the drying preparation step (5), unlike the first embodiment, until the mineral recovery step (3) is completed. Since it is not necessary to leave the seaweed extract-extracted salt water and the mixing step (4) can be omitted, the time of each production cycle can be further shortened.

FIG. 4 is a flowchart of a method for producing algal salt, showing a fourth embodiment of the present invention.
As shown in FIG. 4, in the fourth embodiment, in the same process as the algal salt production method of the first embodiment, the seaweed extract-extracted salt water separated in the separation process (2) is added to the additional extraction process (11 ) And the separation step (2) are repeated twice more.

  In the additional extraction step (11), fresh seaweed is introduced into the seaweed extract-extracted salt water separated in the separation step (2) and immersed for a predetermined time, whereby the concentration of seaweed extract contained in the seaweed mixture is increased. Is greatly increased. In this embodiment, the additional extraction step is performed twice. However, when this additional extraction step is performed in the present invention, the number of times may be one or three or more.

The extraction residue separated in each of the separation steps (2) is individually washed with water and then incinerated and carbonized in the mineral recovery step (3). Moreover, the washing | cleaning liquid obtained by said washing | cleaning process is added to the seaweed extract extraction salt water isolate | separated at each isolation | separation process (2), respectively.
However, in the present invention, the extraction residue may be subjected to a mineral recovery step after each separation step (2), or the washing treatment may be omitted or the washing solution may be collected at the end. You may add to the seaweed extract extraction salt water obtained at the isolation | separation process (2).

Next, taking the case where a kombu is used as seaweed as an example, each manufacturing process of the fourth embodiment will be described based on FIG.
First, in the extraction step (1), 1 kg of purified salt is dissolved in 3 kg of water to prepare a salt water with a salt concentration of 25% by weight, and 350 g of kombu is added while the salt water is heated to 85 ° C. Immerse for a minute.

  Next, the salt water in which the above-mentioned kombu is immersed is separated into seaweed extract-extracted salt water and an extraction residue in the separation step (2) as in the first embodiment, and the extraction residue is dehydrated and washed with water. And processed. The washing liquid obtained by this washing treatment was added to the seaweed extract extracted brine and mixed.

Next, the seaweed extract-extracted salt water is added in the additional extraction step (11), in the same manner as in the extraction step (1), 350 g of the kombu is put in a state heated to 85 ° C., and immersed for 30 minutes. The same separation step (2) was performed. Then, this additional extraction step (11) and separation step (2) were repeated once more.
Note that the combs used in the extraction process (1) and the two additional extraction processes (11) were both cut into a predetermined size, similar to the comb used in the first embodiment. .

The extraction residue separated in the above three separation steps (2) was incinerated at once in the mineral recovery step (3). Then, 1.7 kg of water was added to 570 g of the obtained algal ash and dissolved, followed by filtration to obtain 1.47 kg of a mineral solution. In the mixing step (4), this mineral solution was mixed with 3.47 kg of the seaweed extract-extracted brine obtained in the last separation step (2). Thereafter, the mixed preparation was subjected to the drying preparation step (5), the drying step (6), and the finishing step (7) as in the first embodiment to obtain 997 g of a fine powdery algal salt.
The mineral component contained in the obtained algal salt was 0.215% by weight of the calcium component, 7.35% by weight of the potassium component, and 0.347% by weight of the magnesium component.

  In said 4th Embodiment, the additional extraction process was added to said 1st Embodiment. However, in the present invention, this additional extraction step may be added to the second and third embodiments.

  Algae salt obtained by the present invention incorporates components contained in seaweed and has a good mineral balance and stable quality, so it is mixed with table salt, salt added to various foods, and other seasonings. It is suitable for use as a salt used in a complex seasoning.

It is a flowchart of the manufacturing method of algal salt which shows 1st Embodiment of this invention. It is a flowchart of the manufacturing method of algal salt which shows 2nd Embodiment of this invention. It is a flowchart of the manufacturing method of algal salt which shows 3rd Embodiment of this invention. It is a flowchart of the manufacturing method of algal salt which shows 4th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Extraction process 2 ... Separation process 3 ... Mineral recovery process 4 ... Mixing process 5 ... Drying preparation process 6 ... Drying process 7 ... Finishing process
11 ... Additional extraction process

Claims (8)

An extraction step (1) in which 5 to 60 parts by weight of seaweed is poured into salt water prepared by dissolving 100 parts by weight of purified salt in water and adjusted to a predetermined concentration;
A separation step (2) in which the seaweed mixture after the immersion is filtered and separated into a seaweed extract-extracted brine and an extraction residue;
The extraction residue is incinerated and carbonized, water is added to the obtained algal ash to dissolve minerals contained in the algal ash, and then the insoluble matter is removed to obtain a mineral solution (3) )When,
A mixing step (4) in which the mineral solution is mixed with the seaweed extract-extracted brine obtained in the separation step (2);
A drying step (6) for recovering solids by evaporating water from the mixed solution obtained in the mixing step (4);
A method for producing algal salt, comprising: An extraction step (1) in which 5 to 60 parts by weight of seaweed is poured into salt water prepared by dissolving 100 parts by weight of purified salt in water and adjusted to a predetermined concentration;
A separation step (2) in which the seaweed mixture after the immersion is filtered and separated into a seaweed extract-extracted brine and an extraction residue;
The extraction residue is incinerated and carbonized, water is added to the obtained algal ash to dissolve minerals contained in the algal ash, and then the insoluble matter is removed to obtain a mineral solution (3) )When,
A drying step (6) for evaporating water from the seaweed extract-extracted salt water obtained in the separation step (2) to recover a solid content,
A method for producing algal salt, wherein the mineral solution recovered in the mineral recovery step (3) of the previous manufacturing cycle is mixed with salt water in the extraction step (1).   The method for producing algal salt according to claim 1 or 2, wherein in the extraction step (1), the concentration of the purified salt in the brine is 15 to 35% by weight.   The method for producing algal salt according to any one of claims 1 to 3, wherein the seaweed introduced into the salt water in the extraction step (1) is cut into a size of 100 mm or less.   The method for producing algae salt according to any one of claims 1 to 4, wherein in the separation step (2), a seaweed extract-extracted salt water and an extraction residue are separated using a 140 to 250 mesh filter medium. One or more additional extraction steps (11) in which fresh seaweed is introduced into the seaweed extract extracted brine separated in the separation step (2) and immersed for a predetermined time, are further provided.
The method for producing algal salt according to any one of claims 1 to 5, wherein the separation step (2) is performed again on the seaweed mixed solution after immersion in the additional extraction step (11).   The method for producing algal salt according to claim 6, wherein the seaweed introduced into the salt water in the additional extraction step (11) is cut into a size of 100 mm or less. Prior to the drying step (6), the liquid to be dried is homogenized with a stirrer, and the uniform liquid to be dried is dried by a spray drying method in the drying step (6) to collect a powdery solid. to manufacture how the Moshio according to any one of claims 1 to 7.

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