KR100697566B1 - Manufacturing method of bittern for soybean-curd manufacturing and utilized the same - Google Patents

Abstract

Provided is a method for manufacturing bittern for bean curds from deep seawater, wherein the prepared bittern contains no sulfate ion, has a mineral balance between Ca and Mg, and improves a taste of bean curds. The method for manufacturing bittern for bean curds from deep seawater comprises the steps of: collecting deep seawater found at the depth of at most 200m underground to produce bittern for bean curds; removing sulfate ions from the produced bittern by electrodialysis; and controlling a mineral balance between Ca and Mg to prepare bittern for bean curds, wherein a weight ratio of Ca/Mg is adjusted to 0.8-6.0 by using a calcium agent for controlling mineral balance.

Description

Manufacturing method of bittern for soybean-curd manufacturing and utilized the same}

1 is a process chart of the production of the water from deep sea water

2 is a small grouping process chart of the water molecule population

3 is a process chart for removing sulfate ions from the brine by electrodialysis

4 is a process chart of mineral balance adjustment

<Explanation of symbols for main parts of drawing>

 One; Electronic treatment tank 2; electrode

 3; Insulator 4; Stainless steel sheet

 5; Foundation concrete structure 6; grounding

 7; Constant voltage generator (Electron charger)

 7a; Variable resistor 7b; grounding

 7c; Primary winding 7d; Iron core

 7e; Secondary winding 8; Intermediate Treatment Tank

 9; Magnetizer feed pump 10; Magnetizer

11; Small group reservoir 12; Small group transfer pump

13; A brine reservoir 14; Water transfer pump

15; Electrodialysis apparatus 16; anode

17; Cathode 18; Anode chamber

19; Cathode chamber 20; Monovalent anion selective exchange diaphragm

21; Cation selective exchange membrane 22; Sulfate-Ion Water Supply Room

23; Desulfurized ion water chamber 24; Desulfate Ion Water Storage Tank

25; Desulfurization ion water feed pump 26; rectifier

27; Mineral balance adjusting tank 28; Mineral Balance Adjustment Tank Agitator

29; Water transfer pump 30 for tofu manufacturing; Magnetizer

 N; N-Pole S; S-Pole

Ⓢ; Solenoid valve M; Motor

pH; Hydrogen ion concentration

pHIS; PH indicating switch

BI; Baumedo Stopwatch

BIS; Baumedo Indicating Switch

TIC; Temperature indicating controller

ECIS; Electric conductivity indicating switch

The present invention relates to a method for producing soy sauce suitable for tofu production, and more specifically, to tofu production using brine produced as a by-product in the salt production process while producing drinking water and salt from deep sea water of 200 m or less in depth. The present invention relates to a method for preparing a suitable brine.

In general, as a coagulant in the production of tofu, using coarse water produced as a by-product while producing sun salt from seawater, or calcium chloride or glucono-δ-actone in addition to calcium sulfate.

There is a problem that seawater, which is produced as a by-product from sun salt produced by solar heat in salt fields, may contain harmful pollutants, while calcium salts are precipitated and removed from the evaporation site. Since there is almost no calcium component, there is a problem that mineral balance is not suitable.

Among components of sea water NaCl shall remind the salty taste, magnesium (Mg) has a bitter taste, potassium (K) is sour, sulfate ion (SO ₄ ^{2 -)} to to remind the San taste tteurige off the taste of the salt, while the Calcium (Ca) component has the characteristic of softening the taste.

Therefore, the present invention is to propose a method for producing a tofu for the production of tofu with a high calcium content in the mineral component is suitable for mineral balance by taking the deep sea water in a clean water of 200m or less depth.

Deep sea water has a higher concentration of nutrients, such as low temperature, low temperature, phosphoric acid, silicon, and nitrate nitrogen, compared to surface sea water, as shown in Table 1 below. It has low concentrations of environmental pollutants, suspended solids and suspended solids, and low concentration of microorganisms.

             Table 1 Analysis table of deep seawater and surface seawater

    Classification         Item    Deep sea water    Surface layer seawater    General Item   Water temperature （℃）     0-12    16.5-24.0   pH acidity      7.98     8.15   DO dissolved oxygen (mg / ℓ)      7.80     8.91   TOC Organic Carbon (mg / ℓ)      0.962     1.780   Soluble Evaporation Residue (mg / ℓ)   40750 37590   M-alkalido (mg / l)     114.7   110.5       Main element   Cl-chloride (%)       2.237     2.192   Na sodium (%)       1.080     1.030   Mg Magnesium (%)       0.130     0.131   Ca calcium (mg / ℓ)     456   441   K potassium (mg / ℓ)     414   399   Br bromine (mg / ℓ)      68.8    68.1   Sr Strontium (mg / ℓ)       7.77     7.61   B boron (mg / ℓ)       4.44     4.48   Ba barium (mg / ℓ)       0.044     0.025   F Fluorine (mg / ℓ)       0.53     0.56 _{^{SO 4 2 - (mg / ℓ}} )    2833  2627    Nutrient salts NH ₄ ⁺ ammonia nitrogen (mg / l)       0.05     0.03 NO ₃ ^- Nitrogen Nitrate (mg / ℓ)       1.158     0.081 PO ₄ ^{3 -} phosphate (mg / ℓ)       0.177     0.028   Si silicon (mg / ℓ)       1.89     0.32     Trace element   Pb lead (μg / ℓ)       0.102     0.087   Cd Cadmium (μg / ℓ)       0.028     0.008   Cu copper (μg / ℓ)       0.153     0.272   Fe iron (μg / ℓ)       0.217     0.355   Mn manganese (μg / ℓ)       0.265     0.313   Ni nickel (μg / ℓ)       0.387     0.496   Zn Zinc (μg / ℓ)       0.624     0.452   As Arsenic (μg / ℓ)       1.051     0.440   Mo molybdenum (μg / ℓ)       5.095     5.555    Number of bacteria   Viable count (pcs / mℓ) 10 ² 10 ^{4 3-10}

Note) The analysis table in Table 1 analyzes the depth of the deep seawater and surface seawater at 374m below the east of Muroro Lighthouse, Muro City, Koji Prefecture, Japan.

In addition, deep ocean water contains various essential trace elements necessary for the human body, and the number of water molecules under high pressure for a long time is ¹⁷ O-NMR half-width of Nuclear magnetic resonance. Since the value of is not highly subpopulated to 70 to 80 Hz (the number corresponding to 1/10 of the value of the ¹⁷ O-NMR half width is the number of groups of water molecules), in the present invention, the number of groups of water molecules is Is treated with 5 to 6 microclustered water.

The following are the considerations to be taken into consideration when manufacturing deep-sea water withdrawal.

① Mineral balance should be composed of Ca / Mg weight ratio of 0.8 or more.

② In reverse osmosis salt concentration process, it is necessary to operate the membrane without causing rise of pressure loss coefficient, drift of feed water and deterioration of reverse osmosis membrane by causing fouling of membrane due to scale generation during operation.

③ It is magnetized to produce the activated salt.

In the present invention, the Bomedo (° Be) of the Baume's hydrometer representing the specific gravity of seawater is expressed as a numerical value of the scale when the Bomedo hydrometer is floated in the liquid to measure the specific gravity of the liquid, Heavy bomedoes for heavy liquids and light bomedoes for light liquids that are lighter than the specific gravity of water. Among them, pure liquids are pure water. 0 ° Be, 15% saline solution to 15 ° Be, with 15 divisions between them. For liquid solution, 10% saline solution to 0 ° Be and pure water to 10 ° Be. In the case of seawater, Bomedo (° Be) is widely used as a measure of concentration because it approximates the salt concentration (wt%) in seawater.

The relationship between the Bume (° Be) and the specific gravity (d) of the liquid is

For heavy memedo, where the specific gravity of the liquid is heavier than the specific gravity of the water,

d = 144.3 / (144.3-Be). … … … … … … … … … … … … … … … … … ①

In the case of an alarm field where the specific gravity of the liquid is lower than the specific gravity of the water

d = 144.3 / (134.3 + Be)... … … … … … … … … … … … … … … … … … ②

The present invention has been made in view of solving the problems described above and to provide a method for producing a soy sauce suitable for tofu production.

In order to achieve the above object, the present invention is to take the deep sea water to produce the liver water in the salt production process, the step of removing sulfate ions by electrodialysis, to adjust the mineral balance to produce the liver water for tofu production It is characterized by the production of the tofu for the tofu manufacturing process.

First of all, the characteristics of deep ocean water are 200 meters below sea level, and since the deep sea water does not reach the plankton because it does not reach the sun, unlike the sea water at the surface, high nutrients do not exist in the surface water. It is characterized by cleanliness, low temperature stability and mineral balance characteristics.

1. High nutrition

In the deep sea where sunlight does not reach, the photosynthesis by plankton is hardly performed, unlike seawater in the surface layer, so there is no consumption of inorganic nutrients (nitrogen, nitrate, phosphate, silicon) consumed by photosynthesis in the surface seawater. Due to the lack of activity, large amounts of nutrients are decomposed and eluted from organic matter, such as dead bodies of organisms that have settled from the surface, and high concentrations of nutrients exist because there is no plankton to use. .

2. Cleanliness

In the deep sea where sunlight does not reach, there is little plankton, so there are few organisms such as fish, there are few pathogenic microorganisms, and the possibility of contamination by pollutants from land and the atmosphere is very small compared to surface water, and it is very clean. .

3. Low Temperature Stability

Deep sea water is characterized by extremely stable changes in water temperature at low and high pressures without mixing with surface water from the difference in temperature and salt concentration.

4. Mineral Properties

As shown in Table 1, the deep ocean water contains various essential trace elements and harmful metals such as lead (Pb), cadmium (Cd), copper (Cu), arsenic (As), and fluorine (F). Present in trace amounts.

Since the salt dissolved in the deep sea water has the characteristics described above, it is possible to produce high-quality salt water because it contains various mineral components that are hygienic and safe and useful to the human body compared to the natural salt produced from surface seawater.

Therefore, the present invention proposes a method for preparing the tofu for containing tofu containing minerals useful to the human body.

Hereinafter, the present invention will be described in detail with reference to the drawings.

I. Steps to produce the jailer

1) deep water extraction process

In FIG. 1, the deep sea water is taken from the deep seabed of 200 m or less, and the intake method is to take the pipe down to 200 m or less from the ship's bottom, or install the pipe to the sea level 200 m or less, and then take it with a pump. Or, pipes are installed up to 200m below sea level, and the intake wells are installed below sea level to take water according to siphon principle.

2) Heating treatment process

The deep ocean water collected in the sump is warmed to 20 ~ 30 ℃ because of its low viscosity and high filtration efficiency.

The heating method may be supplied with heat from a boiler, or may use surface water in the summer.

3) Small grouping process of water molecule group

In the warmed deep sea water, a group of water molecules is magnetized by a high-voltage constant voltage treatment in a small grouping process and a constant voltage conductive tube magnetizer or a permanent magnetizer. The clusters of are subpopulated, treated with microclustered water, and then sent to the pretreatment filtration process.

In the treatment step of small grouping of water molecules by a process combining a high pressure constant voltage treatment and a magnetization treatment in a magnetizer, the warmed deep water is injected into the electronic treatment tank (1) of the population of water molecules in a small grouping treatment step. From the constant voltage generator 7, a high-voltage alternating current constant voltage is applied to the electrode 2 with a voltage of 3,000 to 5,000 Volt and a current of 0.4 to 1.6 kV, and the positive and negative voltages of the electrode 2 are applied. When the electrostatic field is alternately applied to the water molecules for 4-10 hours alternately, the hydrogen molecules of the water molecules are partially broken while vibrating and rotating the water molecules themselves. (I), to the intermediate treatment water storage tank (8), to the magnetizer supply pump (9) to the magnetizer (10) and to the coil wound on the conductive tube, alternating current or direct current in the range of 0.5 to 5 Volt. After the magnetization treatment by applying low voltage of While returning to the tank 1, microclustered water having a half-value width of ¹⁷ O-NMR of Nuclear Magnetic Resonance (NMR) in the range of 48 to 60 Hz is obtained. When produced, the remainder is sent to the small-sized water storage tank 11 and then sent to the pretreatment filtration process by the small-sized water transfer pump 12.

The flow rate sent from the intermediate treatment water storage tank 8 to the magnetizer 10 by the magnetizer supply pump 9 and returned to the electronic treatment water tank 1 is 1 to 4 times the inflow water flow rate.

The small grouped water thus produced is treated with reduced water having a high alkaline oxidation frequency with a high energy Oxidation Reduction Potential (ORP) value in the range of +100 to -200 kPa.

The voltage applied to the electrode 2 of the electronic treatment tank 1 in the constant voltage generator 7 is adjusted in accordance with the values of pHI (7.4-7.8) and ORPI (+100 Hz or less) provided in the intermediate treatment water storage tank 8. do.

The material of the electrolytic treatment tank 1 is made of stainless steel, and the stainless steel electrode 2 filled with charcoal having high conductivity is inside. To the bottom of the insulator (3) of polyethylene (polyethylene), polyvinyl chloride (PVC), Styrofoam (Styrofoam) is selected and installed, the lower part of the insulator (3) is a conductor and corrosion-resistant material A steel sheet 4 is installed between the foundation concrete structures 5, and the stainless steel sheet 4 is grounded 6 to the ground.

The magnetizer 10 is a constant voltage conductive tube magnetizer wound around a cylindrical conductive tube made of an insulating material such as synthetic resin (PVC, PE, styrene resin, etc.), ebony, FRP, Bakelite, etc. When a low voltage of AC or DC in the range of 0.5 to 5 Volts is applied to the coil of the coil, a magnetic field is formed inside the coil. )

Instead of the constant voltage conductive tube magnetizer, a permanent magnet magnetizer magnetized in the range of 12,000 to 15,000 G (Gauss) may be installed.

When the capacity of the treated water is large, the electronic treatment water tank 1 in which the net of the electrode 2 of stainless steel filled with charcoal is embedded is installed in multiple stages for treatment.

As in the present invention, when the high-pressure constant voltage treatment and the small group of small groups of water molecules by the magnetizer are treated with small groups of water, the surface tension and viscosity of the water are reduced and the penetration force is reduced. ), The salt concentration efficiency in the reverse osmosis salt concentration process is improved, and various mineral components are activated by magnetization, and when used in salted foods, there is a characteristic of generating activated minerals having excellent mineral absorption rate of fermented microorganisms. .

However, if the small grouping process of water molecules is omitted in order to reduce the facility cost, the deep seawater heated to 20-30 ° C. is bypassed to the small grouping step of the water molecule group and sent to the pretreatment filtration process.

4) Pretreatment Filtration Process

Pretreatment filtration process is performed by sand filtration, micro filtration, ultra filtration alone or a combination of two or more of them, followed by nanofiltration and reverse osmosis filtration. Reverse osmosis filtration (SS) removes suspended solids (SS) that can cause fouling.

At this time, the filtration pressure is determined in consideration of the pressure loss of the filter and the pressure loss of the pipe according to the operating conditions.The filtration speed of sand filtration is 6-10 m / hour, and the effective diameter of the filter sand is 0.3-0.45 mm, the uniformity coefficient shall be 2.0 or less, and the thickness of the filtrate layer shall be 0.5-1.0 m.

At this time, if the turbidity of the deep ocean water taken is 2 mg / ℓ or less, it is not necessary to sand filtration.

Micro-filter and ultra-filter are not limited to the type of filtration membrane, and the supply pressure of the pump is decided by considering the filtration speed and the pressure loss according to the vendor's specifications. do.

Filtration in microfiltration or ultrafiltration treats the fouling index (FI) value of water supplied to the nanofiltration and reverse osmosis filtration processes in the range of 2-4.

The FI value is a numerical value representing the fine turbidity concentration in the target water and is expressed by the following equation.

FI = (1-T ₀ / T ₁₅ ) x 100/15... … … … … … … … … … ③

Where T ₀ is the time required for filtration of the first 500 ml of sample water when the sample water was pressure filtered to 0.2 MPa using a 0.45 μm microfiltration membrane, and T ₁₅ was filtered for 15 minutes in the same state as T _0. It is time required for filtration of 500 ml of sample water.

5) Concentration of Salinity by Nanofiltration and Reverse Osmosis Filtration

The shape of the membrane module of nanofiltration and reverse osmosis is tubular, hollow fiber, spiral wound, and flat plate and frame. It may be used in any form such as), and the material of the film is not particularly limited.

As the material of the nanofiltration membrane, polyamide-based, polypiperazineamide-based, polyesteramide-based, or cross-linked water-soluble vinyl polymer can be used. Is a non-asymmetric membrane with a dense layer on one side of the membrane, and gradually has micropores of large pore diameter from the dense layer toward or within the membrane, or on the dense layer of such asymmetric membrane. A composite membrane having a very thin separation functional layer formed of another material can be used, and piperazine polyamide-based composite membranes are preferred, but the material and structure of the membrane are not particularly limited in the present invention.

① Nano filtration

In the pretreatment filtration process, the deep seawater from which suspended solids are removed is sent to nanofiltration to discharge unfiltered sulfate-containing water, and the filtered desulfurized ionized salt is sent to a reverse osmosis filter.

For the transmission order of the ion in the nano-filtration membrane is a cation is ^{Ca 2 + ≥Mg 2 +> Li} +> Na +> K +> is a NH ₄ ^+, if the anion is _{^{SO 4 2 - »HCO 3 ->}} F - ^{> Cl -> Br -> NO} 3 -> is SiO _2, the case of sulfate ions (SO ₄ ^2-) is hard to permeate than Mg ^{+ 2} and Ca ^{+ 2.}

In nanofiltration, small solubility such as CaCO ₃ , CaSO ₄ , and SrSO ₄ dissolved in deep ocean water causes scale in membranes to concentrate salts in reverse osmosis, resulting in fouling. In order to suppress as much as possible, desulfurized ions brine from which sulfate ions (SO ₄ ^2- ) are removed is sent to a reverse osmosis filter, and the sulfated-containing mineral water is discharged.

In nanofiltration, the supply pressure is 20 to 30 atm, and in the case of spiral, the membrane permeate is 0.7 to 1.4 ㎥ / m², where the membrane permeate is 70 to 80% of the inflow. do.

When operating the operating pressure of reverse osmosis at low pressure of 55 atm or less and operating the filtered demineralized water at 40% or less of influent, since the scale due to sulphate is not a problem, nanofiltration is omitted and the pre-filtered deep seawater is removed. Immediately send to reverse osmosis filter.

Example 1

After warming the deep sea water of Table 1 to 25 ° C, a group of water molecules is injected into the electronic treatment tank 1 of the small group treatment step, and a high-pressure alternating-current constant voltage is applied to the electrode 2 from the constant voltage generator 7. A voltage of 0.5 volts and a current of 0.5 mA for 4 to 10 hours are sent to the intermediate treatment water storage tank (8), and the magnetizer supply pump (9) is sent to the constant voltage conductive tube magnetizer (10) and wound on the coil wound around the conductive tube. After applying a direct current of a range of magnetization, some were returned to the electronic treatment tank (1), and the ultra-large water treated with ¹⁷ half-width of ¹⁷ N-NMR of nuclear magnetic resonance was treated at 52 에서 by ultrafiltration. The pretreated filtrate with a FI value of 3.2 was subjected to 20 kg / cm2 G pressure using a spiral nanofiltration membrane of model No. SU-610 made of cross-linked polyamide manufactured by Toray Industries, Ltd. Membrane permeated water supplied to the membrane at 1.2m3 / m² The amount of permeated water was 80% of the amount of influent water, and the analysis values of the main components of the sulfated ion-containing mineral water and the filtered desulfurized ionized water as shown in Table 2 below.

        Table 2 Analysis of Principal Components of Water Quality Before and After Nanofiltration

 Item Pre-treated deep sea water (raw water) Desulphurized Water Salt (filtration)   % Removal      pH        7.80         7.24      - Na ⁺ (mg / L)   10,800    9,650     10.65 Cl ^- (㎎ / ℓ)   22,370   17,300     22.66 Ca ^{2 +} (㎎ / ℓ)      456      338     25.88 Mg ^{2 +} (㎎ / ℓ)    1,300    1,060     18.46 K ⁺ (mg / L)      414      355     14.25 _{^{SO 4 2 - (㎎ / ℓ}} )    2,833      608     78.54  B (mg / L)        4.44        4.43       0.23

As shown in Table 2, nano-filtration of deep sea water resulted in almost no removal of boron compounds. The removal rate of salts, calcium, magnesium, etc. was as low as 10-26%, but the sulfate ion was 78.54%. It was quite high.

② Reverse Osmosis Filtration

When desulfurized ions brine filtered by nanofiltration is supplied to reverse osmosis filtration, the operating pressure is supplied to the filtration membrane at 50 to 60 atmospheres (atm), and in the case of spiral filtration membranes, the membrane permeate water is operated at 0.5 to 0.8 m3 / m2. If the salt is removed in the range of 99.0 ~ 99.85wt%, demineralized desalted water is sent to the drinking water manufacturing process, the concentrated brine is filtered and sent to the salt manufacturing process.

Example 2

The desulfurization ion brine, the filtered water filtered in the nanofiltration of Example 1, was pressured 60 kg using a spiral reverse osmosis membrane of model No. SU-810 for high pressure reverse osmosis membrane of Toray Corporation of Japan. When the membrane permeate was 0.72m3 / m2 / day and the membrane permeate was 52% of the inflow, the unfiltered brine flow rate was 48%. . Analysis of the main components of concentrated brine is shown in Table 3 below.

Table 3 Analysis of main components of demineralized and concentrated brine

     Item  Influent Water (Desulphurized Salt Water) Filtrate (Demineralized Water) Concentrated brine Filtration removal rate (%)      pH        7.24        7.20      7.28       - Na ⁺ (mg / L)    9,650       38.7  20,062.5     99.60 Cl ^- (㎎ / ℓ)   17,300       71.6  35,964.1     99.59 Ca ²⁺ (mg / L)      338        0.6     703.5     99.82 Mg ²⁺ (mg / L)    1,060        1.9   2,206.2     99.82 K ⁺ (mg / L)      355        1.7     737.7     99.52 SO ₄ ^2- (mg / L)      608        4.7   1,261.6     99.23  B (mg / L)        4.43        1.8       7.1     59.37

As shown in Table 3, in the reverse osmosis filtration of the deep sea water, most of the minerals in the demineralized water, except for boron, were filtered out by 99% or higher, and the concentration of the mineral brine in the concentrated brine was concentrated to 6wt%. At this time, the Bomedo specific gravity was 5.9 ° Be.

6) Production process of the brine in the salt manufacturing process

When the seawater is concentrated, calcium sulfate (CaSO ₄ ) is first crystallized when the seawater is concentrated, and when water is continuously evaporated, the amount of raw water is less than one tenth, sodium chloride precipitates, followed by magnesium sulfate. Crystals such as magnesium chloride and potassium chloride are precipitated.

Salt water is deposited by evaporation of seawater, and the remaining liquid contains magnesium chloride, magnesium sulfate, potassium chloride and various other minerals.

In the reverse osmosis filtration process, when the concentration of salt is 5 ~ 6wt% (at this time, the specific gravity is 5 ~ 6 ° Be), the brine is introduced into the salt manufacturing process. When brine is concentrated by evaporation by dry air, concentration by heating, vacuum evaporation by heating, and electrodialysis of ion exchange diaphragm, NaCl starts to precipitate at 24 ~ 26 ° Be. At 32 ° Be, MgCl ₂ begins to precipitate, followed by MgSO ₄ and KCl.

Therefore, in most salt manufacturing processes, salts are precipitated to a specific gravity of 32 to 34 ° Be and produce dehydrated filtrate.

Therefore, the components of the brine produced as by-products during the salt manufacturing process are different according to the salt production method and the operating conditions, and the composition and composition of the brine are as follows.

1) The brine produced when salt is produced in salt salt

Since ancient times, salt water is produced when salt water is taken from salt to make salt by the power of sunlight and wind. It contains a lot of magnesium sulfate, so it is not suitable for tofu manufacturing.

2) The brine produced when salt is produced by evaporation by heating and evaporating in a kiln.

Sea water is taken and boiled in a large pot, etc., to make a total pollution, and the remaining liquid is brine, which also contains a lot of magnesium sulfate, so it is not suitable for making tofu.

3) The brine produced by reverse osmosis membrane concentration

In case of desalination of seawater or deep seawater, brine, which is concentrated brine while producing demineralized water by reverse osmosis membrane as in the present invention, has a high concentration of salt (NaCl) and tofu with seawater concentrate rather than saying that it is brine. It is not suitable as a manufacturing guard.

4) The brine produced while producing salt by ion exchange membrane electrodialysis

Produce salt by concentration of brine by ionizing DC seam by injecting seawater or deep seawater with pretreatment filtration such as sand filtration and microfiltration into multi-stage cation exchange membrane and anion exchange membrane. It is produced in the case of water, and the water produced here contains almost no sulfate ions while removing harmful substances such as PCB, dioxin, harmful mineral arsenic, mercury and lead, and does not precipitate calcium sulfate or magnesium sulfate. When used as a tofu for the taste is good, but there is a problem that the mineral balance is not suitable.

5) Other guards

Recently, as a tofu manufacturing coagulant (coagulant), some chemically produced magnesium chloride, calcium chloride, and the like are dissolved in water and sold as a cod liver. There is no problem even if this is sold as a guard, but there is a problem that mineral balance is not suitable.

The composition of the brine according to the salt preparation method is shown in Table 4 below.

             Table 4 Composition of Graft Water by Salt Manufacturing Method (g / kg)

       Kind of guard MgSO ₄ MgBr ₂ MgCl ₂ CaSO ₄ CaCl ₂   KCl   NaCl  Remarks Ryuha salt salt water  Magnesium Sulfate 41-87 2.3-3.6 130-210 22-32 19-81 Fluctuation 68 3.2 175 29 40 Average Cheonil salt water 8.4-67.1 1.1-7.4 37-218.8 6.5-34.4 16.3-113.6 Fluctuation 53.1 2.6 163.2 22.6 56.1 Average Ion Exchange Membrane Electrodialysis Intermittent  Calcium chloride system 221.8 0.7 40 112.8 14.4 194.5 1.2 37.3 97.3 27.4 208.2 0.6 39.7 79.6 27.4 152.6 0.5 27.8 152.6 56.2

The tofu manufacturing head has a variety of minerals useful to the human body, and the weight ratio of Ca / Mg is in the range of 0.8 to 6, and there should be no acidic sulfate ions.

Thus, the brine discharged from the salt manufacturing process is sent to the step of removing sulfate ions by electrodialysis to remove sulfate ions in the brine.

Example 3

In the reverse osmosis filtration process of Example 2, the brine was concentrated to 5.9 ° Be and injected into the cauldron, and heated by pre-decontamination method. ₄ , CaCO ₃ ) is removed, and the boiled broth, which has a specific gravity of 24 ° Be to 32 ° Be, is filtered and analyzed. Same as the content.

Table 5 Specific gravity at 32 ° Be

                  Analysis of Principal Components of Produced Water

 ingredient MgCl ₂ MgSO ₄ MgBr ₂   NaCl   KCl H ₂ O  Etc  Concentration (wt%)   17.2   7.5   0.3   4.1   3.2   67.4   0.3

II. Removing sulfate ion by electrodialysis

The sulfate ions (SO ₄ ^{2 -)} contained in the brine, since while remind the acidity (酸味) to lower the taste of tofu removal of sulfate ions is a cation exchange membrane is to use a diaphragm which passes through both the cation and anion exchange membranes is A method of removing sulfate ions, which are bivalent or more ions in the liver water, using a diaphragm that transmits only monovalent ions.

In the present invention, when the brine produced in the salt manufacturing process by electrodialysis is supplied to the brine storage tank 13 by diluting water (using demineralized water or mineral water in reverse osmosis filtration) by injecting a specific gravity of 10 to 15 ° Be After dilution, the cation exchange diaphragm uses a cation exchange diaphragm 21 which permeates both monovalent and divalent or higher polyvalent cations with the water transfer pump 14, and the anion exchange diaphragm is a monovalent anion. Sulfuric acid ion-containing liver water supply chamber 22 of the electrodialysis apparatus 15 in which the monovalent anion selective exchange diaphragm 20 selectively penetrating the bay is alternately arranged in a row between the anode 16 and the cathode 17. While supplying to the desulfuric acid ion water storage tank 24, the desulfuric acid ion water of the desulfuric acid ion water storage tank 24 is supplied to the desulfuric acid ion water chamber 23 by a desulfuric acid ion water transport pump 25, and circulated to the desulfuric acid ion water storage tank 24. If a direct current is applied from the rectifier 26 while Of Ca ^{2 +} and residual Na ^+, go to K ⁺ and the negative electrode 17 is de-sulfate ion bittern chamber 23 are all cations to pass through the selected cation-exchange membrane 21, such as, and the anion is a monovalent anion selected exchange membrane ion sulfate using 20 (SO ₄ ^{2 -)} polyhydric divalent or more, such as ion is unable to permeate monovalent anion (Cl ^-), s 1 is side barrel imposed anode 16 the selected anion exchange membrane (20) While moving to the desulfate ions chamber 23, the concentrated water from which sulfate ions have been removed is concentrated.

In the present invention, the cation exchange diaphragm uses a cation selective exchange diaphragm 21 that transmits all cations, and the anion exchange diaphragm comprises a monovalent anion selective exchange diaphragm 20 that selectively transmits only monovalent anions with the anode 16. In the electrodialysis apparatus 15 in which multiple stages are alternately arranged between the cathodes 17, sulfate ions are difficult to penetrate the monovalent anion exchange diaphragm 20, and thus remain in the sulfate ion-containing liver water supply chamber 22. .

The reason why the composition of the water is changed is that the removal of hepatic sulfate ions by ion exchange membrane electrodialysis is difficult for SO ₄ ^{2 -} ions to pass through the monovalent anion selective exchange diaphragm 20. The same phenomenon is called the selective permeability of ions.

When the brine is supplied to the brine storage tank 13 in the salt manufacturing process, it is supplied to the brine-containing liver water supply chamber 22 by the brine transfer pump 14 and returned to the brine storage tank 13, while the desulfuric acid ion storage tank 24 is supplied. When the sulphate of which the sulphate ion is removed is supplied to the desulfurization ion water storage chamber 23 by a desulfurization ion water feed pump 25, and is circulated to the desulfurization ion water storage tank 24, and a direct current is applied from the rectifier 26. , All the cations in the brine of the sulfate-ion-containing water-supplying chamber 22 pass through the cation selective exchange diaphragm 21 by electric attraction force and move to the desulfuric-ion-ion water-chamber 23 on the negative electrode 17 side. The anion is passed through the monovalent anion selective exchange diaphragm 20 to selectively remove monovalent anions except divalent or higher ions such as sulfate ions. When it is set to 8 to 20 mW / cm, the conductivity sheet By operating a solenoid valve (ⓢ) by an electric conductivity indicating switch (ECIS), the sulfate-containing water is sent to a magnesium sulfate recovery process, and the desulfuric acid ion water from which the sulfate ions are removed from the desulfurization ion water storage tank 24. When the specific gravity of the short selling is concentrated in the range of 10 to 22 ° Be, the solenoid valve ⓢ is operated by a Baume indicating switch (BIS) to be sent to the mineral balance adjusting tank 27.

And when the water level of the desulfurization ion water storage tank 24 falls, demineralized water is supplied to the water level controller LS installed in the desulfurization ion water storage tank 24 by the operation of the solenoid valve ⓢ.

In the electrodialysis apparatus 15 for concentrating salts while removing sulfate ions described above, all cations such as Na ⁺ , K ⁺ , Ca ^{2 +} , Mg ^{2 + in water} pass through a cation exchange membrane, and Cl ⁻ , Br ^-, SO ₄ ^{2 -} anion, such as sulfate ion (SO ₄ ^{2 -),} except monovalent anions only using selective anion-exchange membrane that is exchanged by the ion size of greater sulfate ion (SO ₄ ^{2 -)} is difficult to pass Because.

The anode 16 of the electrodialysis apparatus 15 for concentrating the brine while removing sulfate ions is a corrosion-resistant material and a dimensionally stable anode (DSA) electrode or a platinum-plated electrode having a high chlorine and oxygen generation overvoltage. The anode chamber solution is injected to the solution passed through the cathode chamber 19 to suppress the generation of chlorine and oxygen on the surface of the anode 16, the cathode 17 is hydrogen generated overvoltage (水 素 發生 過 電壓) This high Ranney nickel or stainless steel plate is used, and the cation exchange diaphragm closest to the cathode chamber 19 uses a hydrogen ion impermeable membrane or a monovalent anion permeable membrane. As a result, the amount of hydrogen ions (H ⁺ ) generated on the surface of the cathode 17 is reduced to improve power efficiency and reduce odor.

In order to reduce the treatment efficiency by generating scale in the desulfurization ion water chamber 23, a polarity switching device is installed in the rectifier 26 so that the attached scale can be detached. do.

The electrolyte solution of the electrode chamber is supplied to the cathode chamber 19 to supply the electrolyte solution discharged to the cathode chamber 18, and the electrolyte solution (cathode chamber solution) supplied to the cathode chamber 19 may use deep sea water. 3-10 wt% Na ₂ SO ₄ The use of an aqueous solution makes it possible to suppress corrosion of the electrode and generation of chlorine (Cl ₂ ) gas at the anode 16.

In order to increase the processing performance of the electrodialysis apparatus 15, it is preferable to make the current density as high as possible in the range below the limit current density, but the limit current density is proportional to the salt concentration and the diffusion layer. Since the thickness of the diffusion layer is inversely proportional to the thickness of, the concentration of the diffusion layer depends on the concentration of sulfate-containing interstitial water and the concentration of desulfurized-ion interstitial water. In the present invention, the cation selective exchange membrane 21 and the monovalent anion selective exchange Sulfuric acid ions are supplied to an electrodialysis apparatus (15) consisting of a sulfate-ion-containing interstitial water supply chamber (22) and a desulfate-ion interstitial chamber (23) in which the diaphragm (20) is alternately arranged between the anode (16) and the cathode (17). The contained brine is sent to the sulfate ion-containing liver water supply chamber 22 by the brine transfer pump 14, and partly circulated after desalination, and the concentrated brine is desulfurized ion water storage chamber 23 by the desulfuric acid ion water transfer pump 25. Sent to By supplying a large amount of concentrated brine which is passed through the desulfurization ion water chamber 23 so that the scale component is not generated in the desulfurization ion water chamber 23 while improving the salt concentration efficiency, the scale trouble can be prevented. By supplying concentrated brine with a high salt concentration to the sulfate ion water chamber 23, the liquid resistance of the current is reduced, so that the limit current density can be increased, and the treatment performance of the electrodialysis apparatus 15 for removing sulfate ion is improved. Can be improved.

In order to improve the electrodialysis efficiency and to suppress scale trouble by increasing the amount of energization by increasing the limit current density in the electrodialysis apparatus 15, the flow rate to be supplied to the sulfate ion-containing liver water supply chamber 22 is a membrane line. The sulfuric acid ion-containing water is returned to the brine storage tank 13 at a speed ranging from 10 to 30 cm / sec. It returns to the desulfurization ion water storage tank 24 so that a speed | rate may be maintained for 1-3 cm / sec.

The cation selective exchange diaphragm 21 used in the electrodialysis apparatus 15 is negatively charged to the main chain of the polystyrene-divinylbenzene system R-SO _3- ^. The monovalent anion selective exchange diaphragm 20 is a membrane capable of exchanging negative ions, and the electrostatic charge R-NH is used. and securing the ₃ ⁺ in the polymer chain (polymer chain), it secures the static charge in the film, also known as jeongha conductive film (正荷電膜), an ion-exchange group and crosslinking (架橋) by an aliphatic hydrocarbon group (脂肪族炭化水素) An anion exchange membrane in which a thin layer of a polymer material having a cation exchange group is formed on the surface of the membrane, and is cross-linked with aliphatic hydrocarbons to the monomer introduced into the exchange group. It is good to be oxidized and cationic bridge Examples of the polymer having a group include a polymer electrolyte having a cation exchange group, an insoluble polymer having a linear polymer electrolyte or a cation exchange group, and specifically, a sulfonate such as Ligninsulfonate, Phosphoric acid ester salts such as higher alcohol phosphate esters, such as polymer electrolytes having a cation exchange group having a molecular weight of 500 or more, methacrylic acid, carboxylic acid groups such as styrene sulfonic acid (-COOH) or sulfonic acid groups (- 1 of an insoluble polymer having a linear polymer electrolyte containing a large number of monomer units having SO ₃ H), a cation exchange group condensing phenols and aldehydes including a cation exchange group. Use membranes to selectively exchange anions.

However, in the case of the brine concentrated in the salt manufacturing process by electrodialysis, there is almost no sulfate ions in the brine, so the brine discharged in the salt manufacturing process is omitted to remove the sulfate ion by electrodialysis. , And sends the brine discharged from the salt manufacturing process to the mineral balance adjustment tank (27).

Example 4

The cation exchange diaphragm uses a membrane capable of permeating all cations with a negative charge of R-SO ₃ ^- in the polystyrene-divinyl benzene backbone, and the anion exchange membrane immobilizes the static charge R-NH ₃ ⁺ to the polymer chain. Asahi Glass Engineering Co., Ltd., which uses a membrane that selectively exchanges monovalent anions of insoluble polymers in which an ion exchange group is crosslinked by an aliphatic hydrocarbon while a thin layer of polymer material having a cation exchange group is formed on the surface of the membrane. In an electrodialysis apparatus consisting of a sulfate ion-containing liver water supply chamber and a desulphurized salt water chamber in a line of 20 cm × 10 cm ion exchange diaphragms, each having a thickness of 3 mm, The demineralized water discharged from the reverse osmosis filtration process for the brine produced at a specific gravity of 32 ° Be After injection and dilution to ° Be, the desulphurized liver water in the desulfuric acid liver water storage tank is returned to the desulfuric acid liver water transfer pump to the desulfuric acid liver water transfer pump, and is fed to the salt water storage tank and returned to the salt water storage tank. The composition of the desulphurized ionized water discharged at 20 ° Be from the desulfurized ionized water storage tank while applying DC voltage is shown in Table 6 below.

     Table 6 Analysis of Principal Components of Desulfate Ion Treated by Electrodialysis Process

 ingredient MgCl ₂ MgSO ₄ MgBr ₂   NaCl   KCl H ₂ O  Etc  Concentration (wt%)   14.94     -   0.26   3.56   2.78   78.20   0.26

The cation exchange membrane as shown in Table 6 using a film capable of transmitting all the cation and anion exchange membranes monovalent ion anion only optionally during the guard removal of sulfate ions in an electrodialysis device sulfate of MgSO ₄ is detected to exchange the Water was produced without the use of MgCl ₂ .

III. Adjusting the mineral balance to prepare the tofu manufacturing head

1) Manufacturing Process of Calcium Powder

Calcium powder for mineral balance adjustment is calcium salt precipitated from bones of animal such as bovine bone, egg shell, shell of shell like oyster shell, coral reef and salt manufacturing process Like (CaSO ₄ , CaCO ₃ ), the calcium component is calcined at 800-1,200 ° C. and then pulverized powder is used.

Animal bones such as bovine bone are composed of calcium phosphate apatite, and eggshell is composed of calcium carbonate (CaCO ₃ ), and shells such as oyster shells. In the case of calcium carbonate (CaCO ₃ ) is composed of a main component and a small amount of magnesium carbonate (MgCO ₃ ) is contained.

When the above-mentioned calcium material is calcined at 800 to 1,200 ° C., organic and volatile substances are thermally decomposed, and in the case of animal bone, calcium phosphate hydroxide (Ca ₅ (PO ₄ ) ₃ OH; ), And the calcium salt precipitated in egg shell, shell, and salt manufacturing process is converted into calcium oxide (CaO) to soluble calcium.

The above-mentioned calcium material is calcined at a firing temperature of 800 to 1,200 ° C. for 2 to 3 hours to be pulverized into 300 to 400 mesh particles to form a calcium powder as a mineral balance regulator.

The pulverized calcium powder is injected into an aqueous solution of 3-15 wt% hydrochloric acid at a pH of 6.5-7.5 to prepare a calcium for mineral balance adjustment. The reaction is shown in the following reaction formula ④.

CaO + 2HCl → CaCl ₂ + H ₂ O... … … … … … … … … … … … … … … … ④

2) Manufacturing process of tofu manufacturing by adjusting mineral balance

Sulfate ion in the electrodialysis device _{^{(15) (SO 4 2 -}} ) the catch is removed and concentrated sulfuric acid ion bittern is de-sulfate ion bittern bome in the storage tank 24 is also specific gravity concentrated to 10~32 ° Be range deionized sulfate ion bittern When the solenoid valve (ⓢ) is supplied to the mineral balance adjusting tank 27 by the BOME, the specific gravity indication controller (BIS) supplies the above-mentioned calcium powder so that the weight (weight) ratio of Ca / Mg is 0.8 to 6.0. do.

When the desulfurization ion water is supplied to the mineral balance adjusting tank 27, calcium powder is injected and stirred with the mineral balance adjusting tank stirrer 28 for 0.5 to 2 hours.

 The stirring method is a propeller stirrer, and the stirring time (retention time) is stirred at 0.5 to 2 hours and the rotation speed is 180 to 360 RPM, while dissolving the calcium powder which is a mineral balance adjusting agent, and discharging it to the head water feed pump for manufacturing tofu (29). It is sent to the magnetizer 30 installed on the side and circulated 4 to 10 times the flow rate of the inflow flow through the mineral balance adjusting tank 27, and magnetized to activate the mineral component, and then packaged and inspected for tofu production. Prepare a guard.

The material of the mineral balance adjusting tank stirrer 28 and the tofu manufacturing water transfer pump 29 uses one type of SUS-316L, titanium, and bronze alloys, which are flame resistant materials.

The magnetizer 30 provided at the discharge side of the tofu manufacturing water transfer pump 29 has the same magnetizer as the constant voltage conductive tube magnetizer or permanent magnetizer in the small grouping process. use.

The mineral component of the liver is activated by magnetizing the magnetizer 30 by the magnetizer 30 installed on the discharge side of the tofu manufacturing pump 29 for tofu production. Intake efficiency can be improved.

However, in order to reduce the facility cost and operating costs even if the above-described performance of the product is somewhat reduced, it may be possible to manufacture the tofu production without supplying the mineral balance adjustment calcium agent in the mineral balance adjustment step.

In addition, the tofu can be produced by the step of omitting the small grouping process, the nano filtration process, the electrodialysis process, and the mineral balance adjusting process of the water molecule group.
Specifically, the deep seawater heated to 20 to 30 ° C. was bypassed by the small grouping process of the water molecule group to the pretreatment filtration process, and the filtered water filtered in the pretreatment process was passed through the nanofiltration process. It is sent to the reverse osmosis filtration process, and the waste water discharged from the salt manufacturing process is sent to the mineral balance adjustment process by bypassing the electrodialysis process, and the mineral balance adjustment step is manufactured without supplying calcium agent for mineral balance adjustment step. It may be.

Example 5

In Example 4, the cation exchange diaphragm uses a membrane capable of permeating all cations, and the anion exchange membrane is an electrodialysis apparatus for selectively exchanging only monovalent ion anions. The resultant was calcined in 350 mesh and pulverized, and then dissolved in 10 wt% aqueous hydrochloric acid (HCl) solution with a pH of 6.8, and then dissolved at a weight ratio of Ca / Mg of 2, followed by stirring. The magnetic field of the neodymium magnet magnetized to 11,500 gauss was magnetized at a flow rate of 6 m / Sec to prepare a tofu for the manufacturing of tofu, and the component analysis values of the prepared tofu are shown in Table 7.

     Table 7 Analysis of Main Components of the Tofu Manufacturing Scale with Mineral Balance

 ingredient MgCl ₂ CaCl ₂ MgBr ₂   NaCl   KCl H ₂ O  Etc  Concentration (wt%)   8.79   12.56   0.15   2.10   1.64   74.61   0.15

Example 6

Tofu made by providing the tofu manufacturing agent prepared in Example 7 to a company that manufactures tofu using the brine produced in the solar salt manufacturing process, and the tofu made with the soy sauce produced in the natural salt manufacturing process was tested by 20 people. As a result of the sensory test of taste, all the tasters made the tofu made with the tofu preparation made in the present invention, the taste of the tofu was light and the bitterness was low, and the taste was excellent.

As described above, the present invention, after removing the sulfate ions from the brine produced in the salt manufacturing process from the deep sea water, and then adjusting the mineral balance of Ca / Mg tofu manufacturing head containing a variety of minerals useful to the human body It is expected to be widely used to make tofu because it has the effect of improving the taste of tofu.

Claims (6)

Taking the deep sea water below 200m deep to produce the water, removing the sulfate ion by electrodialysis, and adjusting the mineral balance to make the water for manufacturing tofu, each step is followed by the following process A method of manufacturing the tofu manufacturing head water from the deep sea water which is sequentially performed. I. Steps to produce the jailer 1) deep water extraction process Deep sea water is collected from the depth of the sea below 200m and sent to the sump. 2) Heating treatment process The deep seawater collected in the sump is warmed to 20-30 ° C and sent to a small grouping process of the water molecule population. 3) Small grouping process of water molecule group Deep sea water warmed at 20 to 30 ° C. is injected into the electronic treatment tank 1 of the small grouping treatment step of the water molecule population, and a high-pressure alternating-current constant voltage is supplied from the constant voltage generator 7 to the electrode 2. When the hydrogen bond of water molecules is partially broken by applying a voltage of 3,000 to 5,000 Volt and a current of 0.4 to 1.6 mA for 4 to 10 hours, the intermediate treatment water storage tank 8 To the magnetizer supply pump (9) to the magnetizer (10), and applied to the coil wound on the conductive tube by applying a low voltage of AC or DC in the range of 0.5 to 5 Volt to perform magnetization. Subsequently, the half-value width of ¹⁷ O-NMR of Nuclear Magnetic Resonance (NMR) in the range of 48 to 60 Hz was microclustered while being returned to the electronic treatment tank 1. After the water is produced, it is sent to the small-sized water storage tank (11) and then pretreated by the small-sized water transfer pump (12). Send. 4) Pretreatment Filtration Process The pretreatment filtration process uses sand filter, micro filter, ultra filtration alone or a combination of two or more to filter the water pollution index (FI). Is treated in the range of 2 to 4 and sent to nanofiltration for concentration of salts by nanofiltration and reverse osmosis filtration. 5) Concentration of Salinity by Nanofiltration and Reverse Osmosis Filtration ① Nano filtration In the pretreatment filtration process, the deep seawater from which suspended solids have been removed is sent to nanofiltration, and the filtered sulphate-containing water is discharged, and the filtered desulfurized ions are sent to reverse osmosis filtration. ② Reverse Osmosis Filtration Demineralized ions brine filtered in nanofiltration is fed to a reverse osmosis filter, and demineralized salts are sent to the drinking water manufacturing process, and concentrated brine is filtered and sent to the salt manufacturing process. 6) Production process of the brine in the salt manufacturing process When brine concentrated in reverse osmosis is supplied to the salt manufacturing process, salts of Bomedo are concentrated to 32-34 ° Be, and the dehydrated filtrate is produced to remove sulfate ions by electrodialysis. II. Removing sulfate ion by electrodialysis When the brine produced as a by-product in the salt manufacturing process is supplied to the brine storage tank 13, dilution of the dilution water by injecting the Bomedo specific gravity of 10 to 15 ° Be and dilution, the cation exchange diaphragm by the brine transfer pump 14 is 1 A cation selective exchange diaphragm 21 is used which penetrates both monovalent and divalent and multivalent cations, and the anion exchange diaphragm anodices the monovalent anion selective exchange diaphragm 20 which selectively transmits only monovalent anions. The desulfurized ion water is supplied to the effluent storage tank 13 while feeding it to the sulphate-ion-containing liver water supply chamber 22 of the electrodialysis apparatus 15 in which multiple stages are alternately arranged in a row between the 16 and the cathode 17. The desulfuric acid ion water of the storage tank 24 is supplied to the desulfuric acid ion water storage chamber 23 by the desulfuric acid ion water transport pump 25, and circulated to the desulfuric acid ion water storage tank 24 while direct current is supplied from the rectifier 26. When applied, in the brine in the sulfate-containing interstitial water supply chamber 22 All the cations pass through the cation selective exchange diaphragm 21 by electrical attraction force and move to the desulfurization ion water chamber 23 on the negative electrode 17 side, and the anion is a divalent or higher ion such as sulfate ion. Only the monovalent anions except the permeate penetrate the monovalent anion selective exchange diaphragm 20 and selectively move to the desulfuric acid ion water chamber 23, and when the concentration of the water is lowered, the solenoid is controlled by an electric conductivity indicating switch (ECIS). By operating the valve (ⓢ), the sulfuric acid ion-containing water is sent to a magnesium sulfate recovery process, and the concentration of short-selling desulfuric acid ion water in which the sulfate ion is removed from the desulfurization-ion water storage tank 24 is concentrated in the range of 10 to 22 ° Be. When the solenoid valve (ⓢ) is operated by the Baume indicating switch (BIS) is sent to the mineral balance adjustment tank (27). III. Adjusting the mineral balance to prepare the tofu manufacturing head 1) Manufacturing Process of Calcium Powder Calcined CaSO ₄ and CaCO ₃ precipitated at 800-1,200 ℃ in bone, eggshell, oyster shell, coral reef and salt manufacturing process And then pulverized into 300-400 mesh particles, and then injected into 3-15 wt% aqueous hydrochloric acid solution at a pH of 6.5-7.5 to prepare a calcium for mineral balance adjustment. 2) Manufacturing process of tofu manufacturing by adjusting mineral balance When the concentrated desulfuric acid ion water from which the sulfate ion (SO ₄ ^2- ) has been removed from the electrodialysis apparatus 15 is supplied to the mineral balance adjusting tank 27, the weight (weight) ratio of Ca / Mg of the above-described mineral regulator is increased. It is supplied at a ratio of 0.8 to 6.0, and stirred for 0.5 to 2 hours by the mineral balance adjusting tank stirrer 28, and sent to the magnetizer 30 installed on the discharge side by the water transfer pump 29 for tofu manufacturing, and the inflow flow rate The flow rate of 4 to 10 times is circulated to the mineral balance adjusting tank 27 to magnetize the mineral component to activate the mineral component, and then packaged and inspected to prepare the tofu manufacturing head. The method according to claim 1, wherein when the concentration of the brine in the salt production step by electrodialysis, since there is almost no sulfate ions in the liver water, the water discharged from the salt production step is a mineral balance adjustment tank ( 27) a method for producing a tofu manufacturing process by the step to send. The method of claim 1, wherein in order to reduce the facility cost and operating costs even if the performance of the product is somewhat reduced, the method for producing the tofu manufacturing head without supplying the mineral balance adjustment calcium agent in the mineral balance adjustment step. The method of claim 1, wherein the deep-sea water warmed to 20 ~ 30 ℃ in order to reduce the facility cost by bypassing the small grouping process of the water molecule population to the pre-treatment filtration process to produce the tofu production. The method according to claim 1, wherein when operating the operating pressure of the reverse osmosis filtration process at a low pressure of 55 atm or less to drive the filtered demineralized water to 40% or less of the influent, by the step of sending the filtered deep sea water directly to the reverse osmosis filtration process How to prepare the tofu for tofu production. The deep-sea water heated to 20-30 degreeC is bypassed by the small grouping process of a water molecule group, and is sent to a pretreatment filtration process, The filtered water filtered at the pretreatment process is a nanofiltration process. Bypass the water to the reverse osmosis filtration process, the water discharged from the salt production process bypasses the electrodialysis process to the mineral balance adjustment process, and in the mineral balance adjustment step to supply the mineral water for tofu production without supplying the calcium agent for mineral balance adjustment How to manufacture.

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