KR20170063102A - Purification method and device of Waste Brine for Recycling - Google Patents

Purification method and device of Waste Brine for Recycling Download PDF

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Publication number
KR20170063102A
KR20170063102A KR1020150169089A KR20150169089A KR20170063102A KR 20170063102 A KR20170063102 A KR 20170063102A KR 1020150169089 A KR1020150169089 A KR 1020150169089A KR 20150169089 A KR20150169089 A KR 20150169089A KR 20170063102 A KR20170063102 A KR 20170063102A
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KR
South Korea
Prior art keywords
brine
screen
chinese cabbage
filtration step
pore size
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Application number
KR1020150169089A
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Korean (ko)
Inventor
한응수
김현주
홍성욱
이혜진
최세원
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한국식품연구원
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Priority to KR1020150169089A priority Critical patent/KR20170063102A/en
Publication of KR20170063102A publication Critical patent/KR20170063102A/en

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B7/00—Preservation or chemical ripening of fruit or vegetables
    • A23B7/10—Preserving with acids; Acid fermentation
    • A23B7/105—Leaf vegetables, e.g. sauerkraut
    • B01D29/0029—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/39—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/28—Strainers not provided for elsewhere
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters

Abstract

The present invention relates to a purification method and a purifying apparatus for reusing a Chinese cabbage pickling brine, comprising a step of draining salt water of a cabbage pickling bath, a step of first filtering the contaminants contained in the saline water to be drained, a step of heating, Precipitating coarse particles which have not been removed in the precipitation step and particulate matter having a specific gravity greater than 1, a second filtration step of removing fine particles not removed in the precipitation step, and a step of removing odor, color and microorganisms And an apparatus for purifying the brine pickled saline.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purifying method and a purifying device for reusing salted Chinese cabbage,

The present invention relates to a purification method and a purification apparatus for reusing a Chinese cabbage pickling brine and, more particularly, to a purification method for reusing a Chinese cabbage pickling brine including primary filtration, heating, precipitation, secondary filtration and sterilization, And a purifier.

According to the Food Code, kimchi refers to Kimchi, Chinese cabbage kimchi, etc. which are processed by fermentation, which are processed by fermentation after being pickled, seasoned and mixed with vegetables such as cabbage as the main raw materials and pickled vegetables such as Chinese cabbage and radish It can be defined as a fermented food of Korea, which is fermented and fermented by various spices such as red pepper powder, green onion, garlic, ginger, and fermented fish paste.

The total consumption of kimchi is estimated to be about 140 ~ 1.5 million tons per year in Korea. Of these, the kimchi of cabbage accounts for about 70% of total consumption.

In a society with a large family in the past, kimchi has been prepared by directly cutting cabbage at home and preparing various kinds of spices. However, in the modern society where the nuclear family center and the dual-income couple are increasing, there is a tendency to prefer processed small- .

As of 2013, kimchi produced at home is 50.8%, while kimchi produced by industry is 49.2%, half of which is produced by kimchi manufacturers. The number of kimchi manufacturers is increasing year by year.

Meanwhile, in order to immerse the kimchi, it is necessary to process the Chinese cabbage into salty water. If you do not cut cabbage and spice it up, the moisture contained in the cabbage leaves the cabbage and lowers the viscosity of the spice, especially because the lactobacillus does not work properly and you can not taste the original taste of kimchi. At home, salt water used for pickling of such cabbage is generally discarded without being reused. However, in a factory that manufactures a large amount of kimchi, it is necessary to prevent the increase of manufacturing cost and to carry out an appropriate purification process in terms of environmental protection, This is the situation we are using.

As a conventional technique for reusing the pickled Chinese cabbage, Korean Patent Publication No. 2002-0023440 discloses a method for removing microorganisms, soluble vitamins, proteins, and the like contained in wastewater generated during cabbage cutting process and washing process, A three-stage metal treatment tank for filtration, a three-stage water treatment tank consisting of a metal mesh, a sand tank, and an activated carbon tank for re-filtering the wash water from which suspended matters have been removed, a filter for filtering the pneumatic water discharged from the three- And a sterilizing treatment device which is a chlorine sterilizing treatment device for sterilizing the microbes of the pneumoconiosis-filtered water and the washing water.

However, the conventional methods and apparatuses for treating salted brine and washing water require a seven-stage filtration process such as a three-stage metal treatment tank, a three-stage water treatment tank, and a filter, The treatment apparatus generates byproducts due to the ozone reaction and poses a problem that maintenance and management are very difficult.

Korean Patent Publication No. 2002-0023440

Disclosure of the Invention The present invention has been made to solve the above-mentioned problems of the prior art, and provides a purification method and a purification apparatus for reusing a Chinese cabbage pickled salt that can effectively remove various foreign substances while simplifying the entire purification process and purification apparatus such as a filtration process It has its purpose.

In order to accomplish the above object, the present invention provides a method for purifying a Chinese cabbage pickling brine, comprising the steps of: discharging brine from a cabbage pickling bath; firstly filtering contaminants contained in the brine to be drained; A step of precipitating coarse particles that have not been removed and particulate matter having a specific gravity greater than 1, a second filtration step of removing fine particles not removed in the precipitation step, and a step of removing odor, And an electrolyzing step for sterilizing the microorganism.

The purification method for reusing the salted Chinese cabbage according to the present invention further comprises a step of heating the saline water between the primary filtration step and the precipitation step for denaturing the soluble protein contained in the saline water do.

The cleaning method for reusing the salted Chinese cabbage according to the present invention is characterized in that the heating temperature is 35 to 95 ° C.

Further, the purification method for reusing the Chinese cabbage pickling brine according to the present invention is a screen having a pore size of 1 cm or more in the primary filtration step, a strainer having a pore size of 0.1 to 2 mm in the secondary filtration step, Filtration with a filter.

The purification method for reusing the salted Chinese cabbage according to the present invention is characterized in that the low-voltage discharge step is further performed using the low-temperature plasma after the electrolysis step.

The purifying apparatus for reusing the Chinese cabbage pickling brine according to the present invention comprises a cabbage pickling tank, a screen having a pore size of 1 cm or more for filtering the contaminants contained in the brine, A sedimentation tank for sedimenting excess particulate matter, a strainer having a pore size of 0.1 to 2 mm to remove fine particles not removed from the settling tank, a bag filter or a disk filter, and a method for sterilizing odors, colors and microorganisms contained in brine And an electrolytic device.

The purification apparatus for reusing the salted Chinese cabbage according to the present invention further comprises a heating tank between the screen and the settling tank for denaturing the dissolved protein contained in the salt water.

The purifying apparatus for reusing the Chinese cabbage brine according to the present invention further comprises a low-temperature plasma at the downstream of the electrolysis apparatus.

According to the present invention as described above, there is provided a method and apparatus simplified in comparison with the prior art by using a screen filtration step having a pore diameter of 1 cm or more, a heating step, a precipitation step, a filtration apparatus equivalent to 0.1 to 2 mm, Can be provided.

In particular, by performing the heating step after the screen filtration step, the soluble protein component can be easily removed, and the viscosity of the brine is lowered, so that the operation cost in the filtration step can be reduced.

1 is a schematic view of a purification method for reusing a salted brine of a Chinese cabbage according to an embodiment of the present invention.

&Quot; and / or "include each and every combination of one or more of the mentioned items. ≪ RTI ID = 0.0 >

In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms " comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements in addition to the stated element.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

Hereinafter, a purification method and a purifier for reusing the salted Chinese cabbage according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view showing a purification method for reusing a salted brine of a Chinese cabbage according to an embodiment of the present invention.

The purification method for reusing the Chinese cabbage pickling brine according to the present invention comprises a step of draining the salt water of the cabbage pickling bath, a step of primary filtration, a step of heating the salt water, a step of precipitating the coarse particles and the particulate matter having a specific gravity exceeding 1 A secondary filtration step, an electrolysis step, and a low-voltage discharge step using a low-temperature plasma.

First, a step of draining salt water of a cabbage pickling bath containing various foreign substances is carried out.

When a Chinese cabbage is dipped for a certain time in a pickling tank containing a salt having a predetermined salinity, various foreign substances such as a cabbage leaf, stem, sand, and larva are incorporated into the pickled salted Chinese cabbage. These foreign substances can cause the failure of the apparatus in the process of transferring the salt water for reuse or reduce the commerciality of the pickled Chinese cabbages due to various microorganisms, so that these foreign substances are removed and then reused.

It is preferable to remove the relatively large particles of the foreign matter first.

It is preferable to remove large contaminants in advance because clogs having a size of several ㎝ or more, such as a cabbage leaf, stems, and straws, can easily obstruct the channel through which salt water travels, .

Here, the filtration apparatus capable of removing the contaminants having a size of several ㎝ or more is not particularly limited, but it is possible to use a screen filtration apparatus having a pore size of 1 cm or more capable of rapidly cleaning a large amount of brine and enduring high water pressure desirable.

On the other hand, when cabbage is cut from salted water, various protein components contained in the cabbage are eluted and the protein content of the salted water becomes high. These proteins cause bubbles in circulation process of the pickled cabbage, causing malfunction of electronic equipment, Breed and cause the factory environment to become dirty.

In general, protein dissolved in saline is small in size and difficult to be removed by a general filtration method. In particular, in order to remove colloidal state or nanometer-sized foreign matter, there is a problem that the apparatus is complicated as well as costly.

In the purification method of the present invention, the step of heating is performed after the primary filtration step in order to remove the dissolved protein contained in the saline water at low cost.

That is, the protein has characteristics that the state or property is changed by physical manipulation such as heat or pressure, or chemical manipulation such as acid or base. When the protein is denatured, the solubility is decreased. Therefore, the protein dissolved in the salt water is converted into particulate matter, so that it can be easily removed in the subsequent precipitation step and / or the second filtration step.

Here, the heating temperature is not particularly limited as long as it is a temperature range in which the protein can be denatured, but is preferably 35 ° C or more and 95 ° C or less.

If the temperature is lower than 35 ° C, denaturation of the protein may not be sufficient, and the solubility protein may be difficult to be granulated. On the other hand, if the temperature is higher than 95 ° C, the heating cost is excessively increased.

On the other hand, when a specific substance contained in a fluid is separated using a filtration apparatus having a plurality of pores, it is common to apply a predetermined pressure to supply the fluid to the filtration apparatus. Such a supply pressure varies depending on the size of the pores, and in particular, the lower the temperature of the fluid, the higher the viscosity, and therefore the higher pressure is required even under the same conditions, which leads to an increase in the running cost.

However, in the present invention, since the primary filtered filtrate is heated to 35 ° C or higher and 95 ° C or lower, it is possible to not only remove the soluble protein through protein denaturation, but also contribute to the reduction of the operation cost in the second filtration step to be described later.

The next step is to precipitate the warmed brine.

The warmed brine still contains coarse particles of less than 1 cm and particulate material of greater than 1 specific gravity, such as sand and clay, which have not been removed in the primary filtration step, And then sinks to the bottom of the settler by its own weight.

In particular, in the precipitation step, protein components denatured by warming can be removed together. The heated protein is denatured and the denatured protein is granulated. Therefore, when the particles are sufficiently large, they can be precipitated alone. Even if the particles are small, they can be attached to coarse particles or clay of less than 1 cm and precipitated together. When the secondary filtration step to be described later is carried out without sufficiently removing the denatured protein, it is preferable to perform the precipitation step because the filtration performance may be lowered by blocking the filter pores.

Here, the settling time can be determined in consideration of the flow rate of the brine and the components of the particles.

When the primary filtration step, the warming step, and the precipitation step are performed, a large amount of contaminants, coarse particles, clay having a specific gravity of 1 or more, and soluble proteins are removed. However, fine particles containing various microorganisms, which are difficult to be visually recognized by the human eye, may still exist even after the above step.

Therefore, it is desirable to perform a secondary filtration step and an electrolysis step in order to completely remove these substances.

The secondary filtration step is to remove particles having a size of several millimeters or less which have not been removed in the precipitation step.

In other words, particles in the colloidal state can not be precipitated only by their own weight, and they can be removed by the coagulation method in which a drug is added. However, the risk and the cost of the drug due to the addition of the drug are needed.

Therefore, in the present invention, a filtration step is performed by using a filtration device which is environment-friendly but can select and remove desired particles without using chemicals.

Here, the filter used in the filtration device is not particularly limited as long as it can remove the particulate matter contained in the brine, but it is preferably a strainer, bag filter or disk filter having salt resistance and durability.

The pores of the strainer, the bag filter or the disk filter are preferably 0.1 to 2 mm.

When the pore size is less than 0.1 mm, the operation cost is increased because the pressure for supplying the brine is increased. On the contrary, when the pore size exceeds 2 mm, the operation cost is low, but the pore is too large, It is preferable to have a pore size falling within the above range.

The following steps are carried out to remove the microorganisms, odor or chromaticity contained in the brine.

Chinese cabbage may contain various microorganisms including larvae. Since these microorganisms are separated from the Chinese cabbage during the Chinese cabbage picking process and remain in the brine, in order to obtain a saffron sauce that is hygienically safe, it is necessary to reuse salt water from which these microbes have been removed.

Therefore, the present invention may further include an electrolysis step for sterilizing and removing these microorganisms.

Electrolysis is an electrolytic decomposition reaction in which an electrode plate having (+) and (-) charges is placed in water and an electric current is applied to these electrode plates to obtain oxygen at the (+ to be. At this time, when sodium chloride is present in the water, sodium hypochlorite having sterilizing and disinfecting power is produced in the positive electrode plate.

That is, since the present invention is salted Chinese cabbage, sodium hypochlorite having strong sterilizing power can be produced without separately injecting sodium chloride, and the sodium hypochlorite can sterilize or inactivate the microorganisms contained in the salt water.

In addition, since sodium hypochlorite produced by electrolysis has oxidizing power as well as sterilizing power, it is possible to oxidize the odor component or hue component generated in the pickling process.

On the other hand, the electrolytic apparatus having the above-mentioned principle corresponds to a technique and an apparatus widely known in the field of water treatment and the like, so that it is not particularly limited as long as it is an electrolytic apparatus capable of achieving the same purpose and function.

The cleaning method for reusing the pickled brine of the present invention may further include a low voltage discharge step using a low temperature plasma.

When water flows between the cathode and anode electrodes facing each other and a voltage is applied to the electrode, a plasma discharge occurs at low voltage to separate water molecules. OH-Radical generated during plasma discharge is chlorine, ozone, hydrogen peroxide It has much more powerful disinfecting power and organic decomposition ability. Therefore, it is possible to completely decompose microorganisms, odors, and chromaticities that may remain in the electrolysis step.

As a generator capable of discharging the plasma in the water with such a low voltage, a gap is formed between the first electrode having a line or cylindrical shape disclosed in Korean Patent Laid-Open Publication No. 2010-0060494 and the first electrode facing each other A second electrode and a first electrode which are formed in a cylindrical shape so as to flow at least one of water, wastewater, and commercial water in the gap, which causes plasma discharge in water in the gap, An apparatus including two electrodes and a housing for supplying water to one side of the gap and discharging hydrogen radical gas and hydrogen radical gas generated by the plasma discharge and led to the other side of the gap may be used, It is not particularly limited as long as it is a device capable of discharging the plasma.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

Claims (8)

A method for purifying a Chinese cabbage pickling brine,
Draining the brine of the cabbage pickling bath;
Firstly filtering contaminants contained in the brine to be drained;
Precipitating coarse particles not removed in the primary filtration step and particulate matter having a specific gravity greater than 1;
A secondary filtration step of removing fine particles not removed in the precipitation step; And
Characterized in that it comprises an electrolysis step for sterilizing odors, colors and microorganisms which have not been removed in the secondary filtration step.
The method according to claim 1,
Further comprising the step of heating the salt water between the primary filtration step and the precipitation step for denaturing the soluble protein contained in the salt water.
3. The method of claim 2,
Wherein the heating temperature is 35 to 95 占 폚.
The method according to claim 1,
Characterized in that the screen is a screen having a pore size of 1 cm or more in the primary filtration step and is filtered with a strainer, a bag filter or a disk filter having a pore size of 0.1 to 2 mm in the secondary filtration step. Way.
The method according to claim 1,
Wherein the low-voltage discharge step is further performed using a low-temperature plasma after the electrolysis step.
A purification apparatus for reusing a Chinese cabbage pickling brine,
Cabbage pickles;
A screen having a pore size of at least 1 cm to filter contaminants contained in said brine;
A sedimentation tank for precipitating coarse particles not removed from the screen and particulate matter having a specific gravity greater than 1;
A strainer, a bag filter or a disk filter having a pore size of 0.1 to 2 mm for removing fine particles not removed from the settling tank; And
And an electrolytic device for sterilizing odors, colors and microorganisms contained in the brine, and a purification device for reusing the salted brine of the Chinese cabbage.
The method according to claim 6,
Further comprising a heating tank between the screen and the settling tank for denaturing the dissolved protein contained in the brine.
8. The method of claim 7,
Further comprising a low-temperature plasma after the electrolysis apparatus.
KR1020150169089A 2015-11-30 2015-11-30 Purification method and device of Waste Brine for Recycling KR20170063102A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107902845A (en) * 2017-12-07 2018-04-13 莱特莱德（北京）环境技术股份有限公司 Portable pickling sauerkraut wastewater treatment equipment
KR20200117272A (en) 2019-04-03 2020-10-14 임홍균 Salt water manufacturing apparatus
KR20230171664A (en) 2022-06-14 2023-12-21 의림환경에너텍 주식회사 Salt water recycling system for kimchi pickling process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107902845A (en) * 2017-12-07 2018-04-13 莱特莱德（北京）环境技术股份有限公司 Portable pickling sauerkraut wastewater treatment equipment
KR20200117272A (en) 2019-04-03 2020-10-14 임홍균 Salt water manufacturing apparatus
KR20230171664A (en) 2022-06-14 2023-12-21 의림환경에너텍 주식회사 Salt water recycling system for kimchi pickling process

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