JP2002081000A - Method of utilizing water in surface treatment, such as plating treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the following problems with the waste water used for conventional plating treatment; there is the constitution to treat the waste water with ion exchange resins, then to filter and to remove the tartaric acid compounds dissolved in the waste water by adding a calcium salt to the filtrate formed by the filtration but this constitution is intricate in the treatment method and there is a possibility that the salt concentration of the waste water increases; there is the constitution to add and agitate sodium hydroxide to the waste water to neutralize the water to a pH 3.5, then to add a chromic acid solution to the filtrate to control the pH to 3.5 but this constitution is intricate in the treatment method and the increase of a cost based on the chemical treatment cannot be averted. SOLUTION: The method of utilizing the water in the surface treatment, such as the plating treatment consists in subjecting the waste water used for the plating treatment to the separation of solid from the liquid, then forming clean water of a pH 10 to 8, warming up the clean water of the pH 10 to 8 up to about 17 to 26 deg.C to form the warmed-up clean water, subjecting the warmed-up clean water to activation treatment with a catalyst means and utilizing this clean water to part of the cleaning water after degreasing treatment. Accordingly, the clean raw water may be recycled as the cleaning water after the degreasing treatment. This method is helpful for saving of drinking water and sewage and the achievement of a cost reduction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION General plating, plating surface processing,
Reduced the amount of tap water, public water, and other clean water used in powder coating surface treatment, plating surface treatment, and surface treatment (referred to as plating treatment) to a maximum of about 1/10 to 1/8. By making effective use of wastewater, water in surface treatment such as plating can be used effectively to improve the environment, improve the environment, reduce the cost and speed up the plating process, reduce the number of tanks, save space in the factory, and effectively use the wastewater. How to use.

[0002]

2. Description of the Related Art Conventionally, for wastewater (wastewater, sludge water, etc.) generated in a plating process, a factory, a civil engineering work site, etc., as literatures corresponding to neutralization, chemical treatment, or discharge through pH adjustment, The following inventions may be mentioned. (1) JP-A-48-29267 discloses a method for treating a chemical copper plating waste liquid (referred to as reference (1)). The gist of the method is that the chemical copper plating waste liquid is treated with an ion exchange resin, and the treated filtrate is treated with calcium. This is a configuration in which a tartaric acid compound dissolved by adding a salt is recovered as calcium tartrate, and is intended to purify wastewater. The purified solution can be used for producing a chemical copper plating solution or can be discharged to a river or a sewer.

(2) A method of treating chromic acid-containing wastewater disclosed in Japanese Patent Application Laid-Open No. Sho 50-129490 (referred to as Reference (2)). 9) The clarified water is reused for washing water, which limits the use of clean water. Also, depending on the intended use of the clarified water
The feature is that the PH range can be selected.

(3) Japanese Patent Application Laid-Open No. 63-274491 discloses a method for treating a plating waste solution containing phosphorous acid or a salt thereof (referred to as Reference (3)). In an aqueous solution, a photocatalyst in which fine particles serving as a catalyst are supported on the surface of inorganic particles of a semiconductor is charged, and phosphoric acid or a salt is converted to phosphoric acid or a salt by irradiating light in the presence of the photocatalyst, and is poorly water-soluble. And removing by precipitation or by a known separation method.

[0005]

The above document (1) discloses that after treatment with an ion-exchange resin, filtration is performed, and a calcium salt is added to a filtrate produced by the filtration to remove a dissolved tartaric acid compound. Configuration. Therefore, problems such as a complicated treatment method and a possibility that the salt concentration of the wastewater may be increased are considered.

Document (2) has a structure in which sodium hydroxide is added and stirred, neutralized to pH 6.0, filtered, and a chromic acid solution is added to the filtrate to obtain pH 3.5. Therefore, problems such as a complicated processing method and an increase in cost due to chemical treatment cannot be avoided.

[0007] Reference (3) further discloses that a photocatalyst carrying fine particles serving as a catalyst is introduced onto the surface of inorganic particles of a semiconductor,
It converts to phosphoric acid or a salt, generates a hydrophobic soluble phosphate, and removes phosphorous acid through precipitation and separation treatment. Therefore, the processing method becomes complicated, based on chemical processing,
Problems such as an inability to avoid an increase in cost are conceivable.

[0008]

According to the first aspect of the present invention, the pH of wastewater used for washing in plating is adjusted to an optimum state for washing by solid-liquid separation (sedimentation separation) / clarification and pH adjustment. The purpose of the present invention is to convert the heated water into clear water, activate the heated water, and reuse it as a part of the washing water after the degreasing treatment.

[0009] Claim 1 is to use the wastewater used in the plating process,
After solid-liquid separation using a precipitation device, the pH is adjusted via pH adjustment.
A clarified water of 10 to 8 is produced, and the clarified water of pH 10 to 8 is
A structure in which the temperature is raised to about 26 ° C. to generate heated heated clarified water, and the heated heated clarified water is subjected to an activation treatment through a catalyst means to be used as a part of the cleaning water after the degreasing treatment. This is a method of using water in surface treatment such as plating.

[0010] The invention of claim 2 is to adjust the pH of the wastewater used for washing in the plating treatment to an optimal state for the washing through solid-liquid separation (sedimentation separation) / clarification treatment and pH adjustment. It is an object of the present invention to reuse as washing water after degreasing in a state where it has been converted, and the salt concentration is maintained and activated.

[0011] Claim 2 is to use the wastewater used in the plating process,
After solid-liquid separation using a precipitation device, the pH is adjusted via pH adjustment.
A clarified water of 10 to 8 is produced, and the clarified water of pH 10 to 8 is
C. to about 26.degree. C. to generate heated clarified water, maintain the salt concentration of the heated clarified water within the range of 10,000 to 17,000 .mu.s (.mu.s: microsiemens value), and use the catalyst means. This is a method of using water in a surface treatment such as a plating treatment in which an activation treatment is performed through the use of the cleaning water after the degreasing treatment.

According to a third aspect of the present invention, the wastewater used for washing in the plating treatment is subjected to solid-liquid separation (sedimentation separation) / clarification treatment and pH adjustment to adjust the pH to an optimum state for washing, and the temperature of the purified water is increased. And maintaining the temperature rise constant at all times, and activating the temperature rise clear water to reuse it as a part of the pickling treatment after the degreasing treatment and / or the washing water after the electrolytic treatment. Aim.

[0013] Claim 3 is to use the wastewater used for the plating process.
After solid-liquid separation using a precipitation device, the pH is adjusted via pH adjustment.
Produce 10-8 clarified water and pH 8-6 clarified water, this pH 10-8
Is heated to about 17 ° C. to 26 ° C. to generate heated warmed clear water, and the warmed clear water is subjected to an activation treatment through a catalyst means, and the washing water after the degreasing treatment is performed. The clarified water having a pH of 8 to 6 is heated to approximately 17 ° C. to 26 ° C. to generate a heated clarified water, and the heated clarified water is activated via a catalyst means. This is a method of using water in a surface treatment such as a plating treatment in which a chemical conversion treatment is performed and a part of the washing water after the treatment such as the pickling treatment and / or the electrolytic treatment is used.

According to a fourth aspect of the present invention, the wastewater used for washing in the plating treatment is subjected to solid-liquid separation (sedimentation separation) and clarification treatment and the pH is adjusted to an optimum state for washing with water. In the activated state, while keeping the temperature of the heated clear water constant, and maintaining the salt concentration of the heated clear water, the pickling treatment after the degreasing treatment and / or the electrolytic treatment after the electrolytic treatment are performed. It is intended to be reused as washing water.

[0015] Claim 4 is to use the wastewater used for the plating process.
After solid-liquid separation using a precipitation device, the pH is adjusted via pH adjustment.
Produce 10-8 clarified water and pH 8-6 clarified water, this pH 10-8
Is heated to about 17 ° C. to 26 ° C. to produce heated clarified water, and the salt concentration of the heated clarified water is increased to 10,000 to 17,000.
In the state maintained within the range of μs (μs: microsiemens value), an activation treatment is performed through a catalyst means to be used as washing water after the degreasing treatment, and the clarified water having a pH of 8 to 6 is used.
The temperature is raised to approximately 17 ° C. to 26 ° C. to generate a heated clarified water, and the salt concentration of the heated clarified water is maintained within a range of 10,000 to 17,000 μs (μs: microsiemens value). This is a method of using water in a surface treatment such as a plating treatment in which an activation treatment is performed via a catalyst means and used as cleaning water after treatments such as an pickling treatment and / or an electrolytic treatment.

A fifth object of the present invention is to easily install and maintain the catalyst means.

[0017] Claim 5 comes into contact with the clarified water, refluxes,
This is a method of using water in surface treatment such as plating, which is a process for activating and clarifying the clarified water, such as ceramic balls, ceramic particles, and ceramic materials.

[0018] It is an object of the present invention that the catalyst means can be easily installed and replaced.

[0019] Claim 6 relates to surface treatment, such as plating, in which the catalyst means is a cartridge type container filled with ceramic balls, ceramic particles, ceramic materials, etc., which are useful for activating and clarifying clarifying water. How to use water.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Wastewater from a plating treatment is treated in each tank (for example, from a storage tank to a separation tank, a pH adjustment tank (reaction tank), a flocculation tank, etc.), and then settled in a precipitation apparatus. Through a solid-liquid separation process. The treated water clarified by this precipitation apparatus is then guided to one or several treatment tanks, adjusted to pH, and converted to clarified water having a pH of 10 to 8. The activation treatment is performed in the storage tank and / or the activation treatment device. In other words, by passing through a cartridge type container filled with ceramic balls that are useful for activation and fining of the clarified water, metals such as copper and iron in each tank in contact with the wastewater are adversely affected. Corrosion of copper etc. is reduced (has the ability to suppress ionization of copper, etc., or has the effect of deionizing ions dissolved in water, etc.), or the circulation of ceramic ball filtered water It is controlled by water, and it is possible to obtain excellent clear water without stagnation and odor. In particular, by maintaining the temperature of the wastewater at about 17 ° C. to 26 ° C. (15 ° C. to 20 ° C.) throughout the year, the above-mentioned effect is maintained.

A pH adjusting tank is provided following the processing tank, and the pH is adjusted in the pH adjusting tank to reach the next processing tank. The next treatment tank is filled with clear water of pH 8-6. The activation treatment is performed in the next treatment tank and / or activation treatment device. That is, this clear water of pH 10-8 is
It is treated and refined in a cartridge type container filled with ceramic balls that are useful for activation and fining of the fining water. Also p
The clarified water of H8 to 6 may be clarified by being processed through a cooler in a cartridge type container filled with ceramic balls useful for activation and clarification of the clarified water. This clear water is
Each is used as treatment water for plating. That is, the clarified water having a pH of 10 to 8 is used as the washing water after the degreasing treatment, and the clarified water having the pH of 8 to 6 is used as the washing water after the treatment such as the pickling treatment and / or the electrolytic treatment.

As described above, by using the clarified water generated by clarifying the wastewater used for the plating treatment, the actual benefits such as minimizing the use of water and sewage and contributing to lower costs can be achieved. is there. There is also a feature that helps prevent pollution.

The temperature of the clarified water whose pH has been adjusted is raised,
The temperature is maintained at about 17 ° C. to 26 ° C. throughout the year, and the ideal temperature is 15 ° C. to 20 ° C. In particular, the temperature of the washing water after the degreasing treatment is used at about 20 ° C to 25 ° C.

Attention should also be paid to the salt concentration of the pH-adjusted clear water, which is maintained within the range of 10,000 to 17,000 μs (μs: microsiemens value).

In the present invention, as shown in the drawings, the treatment method and process of the wastewater in the plating process, or the plating method / type and process, the plating method and process based on the product, etc. It is the same as the above, and is not limited to this example.

The clarified water activated by the ceramic wheel, which is useful for activating and clarifying the clarified water, has the following characteristics. (A) It has an antioxidant action against the oxidation of any substance. (B) It has an extremely strong rust prevention effect. (C) It has a surfactant effect. (D) The use of fine powder of ceramic balls has a great effect in applications in the field of rust prevention. (E) Rust prevention and equipment functionality are improved by using it for cleaning and finishing of electronic components and precision machinery. (F) Energy saving and low maintenance can be expected. This is because it has a favorable effect on the deterioration of the oxide contained in the equipment.
(G) Utilizing the effect of reducing water clusters, it can be used for pretreatment of dehydration machines, filtration devices, etc.

[0027]

An embodiment of the present invention will be described below.

The wastewater A of the plating treatment is transferred from the storage tank 1 to the separation tank 2,
After being treated in each of the tanks (one example) such as the pH adjusting tank 3 and the coagulation tank 4, the solid-liquid separation treatment is performed via the precipitation device 5. The treated water B clarified by the sedimentation apparatus 5 is guided to one or several treatment tanks 6a, 6b, 6c to 6n to adjust the pH as shown in the flowchart of FIG. Converted to C. Desirably, among these processing tanks 6a, 6b, 6c to 6n, any one of the processing tanks 6n is provided with a ceramic wheel, ceramic particles, ceramic material (not shown), carbon By performing the activation treatment by installing the catalyst means 700 such as a rod, it is possible to produce excellent clear fresh water C-1 without further stagnation and odor.
The clarified raw water C-1 is used as washing water after the treatment of the alkaline degreasing tank 8. For example, if there are washing 9a, 9b, 9c-9n,
The structure is such that the clear fresh water C-1 is returned from the washing 9c to the washing 9a. Tap water may be used for any of the washings 9a, 9b, 9c to 9n. The catalyst means 700 may be of a cartridge type and provided with the catalyst means 700 in a pipe from the processing tank 6n to perform the above-described activation treatment. The cartridge type, which is installed horizontally or vertically, allows easy handling and easy maintenance. And, in the vertical installation, the fining water C flows upward from the bottom, and at this water pressure, a ceramic ball useful for activation and fining of the fining water is circulated, and the fining water C or C ′
Ideally, the structure is intended to improve the contact with the ceramic wheel, which is useful for activation, clarification, and the like. Ceramic balls useful for activating and clarifying clarified water are formed by adding useful microorganisms to clay (one kind of raw material) or subjecting clay to EM treatment and then sintering.
Therefore, the ceramic ball useful for activating and clarifying the clarified water can exhibit an EM effect and an EM power effect. The EM effect and the EM power effect have a feature useful for activation of the clarified water C or C ′ (described later) and further clarification. The activation of the clarified water, the ceramic ball useful for the clarification, etc., for example, by fluidizing and / or swirling utilizing the movement of the clarified water C or C ′, to further enhance the effect of the activation and the like. Expansion can be achieved. Ceramic balls useful for activation, clarification, etc. are an example of a catalyst means, and equipment capable of exhibiting the same effects is within the scope of the present invention. In addition, as another use of the clarified fresh water C-1, a pH adjusting tank 7 is separately provided following the treatment tank 6a.
The pH is adjusted in the adjusting tank 7 to generate a clarified water C ′ having a pH of 8 to 6. The clarified water C ′ having a pH of 8 to 6 is subjected to activation treatment through a cooler 701 and a catalyst type catalyst unit 700. The clarified raw water C′-1 thus generated is used as a treatment water for plating. Also, clear water of pH 8-6
C′-1 is used as treatment water for plating.
That is, the clear raw water C′-1 having a pH of 8 to 6 is used as washing water after the treatment of the acid bath 10. For example, when there is a washing 11a, the clear raw water C′-1 is introduced into the washing 11a. In addition, tap water D may be used for the washing 11a. As shown in the figure,
When there are 1a, 11b, 11c to 11n, this clear raw water C'-1
Is returned from the water washing 11c to the water washing 11a. Also wash
In some cases, tap water D is used for 11a, 11b, and 11c. The clear fresh water C'-1 is also used as washing water for the electrolytic washing 12. Also this
The clear raw water C′-1 having a pH of 8 to 6 is subjected to a temperature treatment to raise the temperature to approximately 17 ° C. to 26 ° C. to generate a heated clear water, and the salt concentration of the heated clear water is increased to 10,000 to 17,000. While maintaining the value within the range of μs (μs: microsiemens value), it is used as washing water after the galvanizing 13 treatment. For example, in the case where there are washings 14a, 14b to 14n, the configuration is such that the clarified water C 'is introduced into the washing 14b and then returned to the washing 14a. In addition, tap water D may be used for the washing 14a.

The waste water A is used as clarified raw water C′-1 generated by clarification and activation, and the temperature is raised to approximately 17 ° C. to 26 ° C. to produce heated clarified water. By using as a washing water after the degreasing treatment and / or a washing water after the electrolytic treatment while keeping the salt concentration within a predetermined range, the use of water and sewage can be suppressed as much as possible. In addition, there is a real benefit that it contributes to the treatment of wastewater A, the simplification of the discharge of treated water, or the protection of the environment.

[0030]

According to the first aspect of the present invention, after the wastewater used for the plating treatment is separated into solid and liquid by using a precipitation apparatus, clear water having a pH of 10 to 8 is produced through pH adjustment, and the pH is reduced to 10 to 10. 8 clear water
The temperature is raised to about 17 ° C. to 26 ° C. to generate a heated clear water, and the heated clear water is subjected to an activation treatment through a catalyst means and is used as a part of the washing water after the degreasing treatment. This is a method of using water in a surface treatment such as a plating treatment of the configuration. Therefore, the wastewater used for washing in the plating treatment is activated through solid-liquid separation and pH adjustment, while optimizing the washing, adjusting the temperature, or adjusting the salt concentration, and activating the wastewater to produce clear raw water. Clear water
It has the characteristic that it can be reused as washing water after degreasing.

According to the second aspect of the present invention, after the wastewater used for the plating treatment is separated into a solid and a liquid by using a precipitation apparatus, clear water having a pH of 10 to 8 is generated through pH adjustment, and the purified water having a pH of 10 to 8 is produced. Clear water
The temperature is raised to about 17 ° C. to 26 ° C. to generate heated clarified water, the salt concentration of the heated clarified water is maintained within the range of 10,000 to 17,000 μs, and the activation treatment is performed via a catalyst means. This is a method of using water in surface treatment such as plating, which is configured to be used for cleaning water after degreasing. Therefore, the wastewater used for washing in the plating process is activated to achieve the optimum pH adjustment, temperature rise adjustment, or salt concentration adjustment for the water washing through solid-liquid separation / clarification treatment and pH adjustment, and the clarified raw water is activated. There is a characteristic that the produced clear water can be reused as washing water after the degreasing treatment.

According to the invention of claim 3, the waste water used for the plating treatment is subjected to solid-liquid separation using a precipitation apparatus, and then the pH 10-8 clear water and the pH 8-6 clear water are subjected to pH adjustment. Generated, pH10
~ 8 clarified water is heated to about 17 ° C ~ 26 ° C to generate heated clarified water, and the heated clarified water is subjected to an activation treatment through a catalyst means, and washed after degreasing treatment. Utilized as a part of water, the temperature of clarified water of pH 8 to 6 is raised to about 17 ° C to 26 ° C to generate heated clarified water, and the heated clarified water is activated via catalytic means. This is a method of using water in a surface treatment such as a plating treatment in which treatment is performed and used as a part of cleaning water after treatment such as pickling treatment and / or electrolytic treatment. Therefore, the wastewater used for washing in the plating treatment is adjusted to the optimum pH for washing by solid-liquid separation (sedimentation separation), clarification, and pH adjustment. While making adjustments,
It is activated to produce clear fresh water, and this clear fresh water is characterized in that it can be reused as pickling treatment after degreasing treatment and / or washing water after electrolytic treatment.

The invention of claim 4 is that, after the wastewater used for the plating treatment is separated into solid and liquid by using a precipitation apparatus, the clarified water of pH 10 to 8 and the clarified water of pH 8 to 6 are adjusted through pH adjustment. Generated, pH10
~ 8 clarified water is heated up to about 17 ° C ~ 26 ° C to generate heated clarified water, and the salt concentration of the heated clarified water is increased to 10,000 ~ 17,000
In the state maintained within the range of μs, an activation treatment is performed through a catalyst means to be used as washing water after the degreasing treatment, and clear water having a pH of 8 to 6 is raised to approximately 17 ° C. to 26 ° C. To generate heated warming clear water and raise the salt concentration of the warmed clear water to 10,0
In the state maintained within the range of 00 to 17,000 μs, the surface is subjected to an activation treatment through a catalyst means, and is used as a washing water after treatment such as pickling treatment and / or electrolytic treatment. This is how water is used in the treatment. Therefore, the wastewater used for washing in the plating treatment is adjusted to the optimum pH for washing by solid-liquid separation (sedimentation separation), clarification, and pH adjustment. It is characterized in that it can be activated to produce clear fresh water while adjusting, and this clear fresh water can be reused as pickling treatment after degreasing treatment and / or washing water after electrolytic treatment.

The invention according to claim 5 is a method for utilizing water in surface treatment such as plating, wherein the catalyst means is a ceramic wheel or the like which is useful for activating and clarifying the clarified water which comes into contact with the clarified water and which is recirculated. is there. Therefore, there is a feature that the catalyst means can be easily installed and maintained. The invention according to claim 6 is a method of using water in surface treatment such as plating, which is a cartridge type container in which a catalyst means is filled with ceramic balls or the like useful for activation and clarification of clarification water. Therefore, there is a feature that the catalyst means can be easily installed and replaced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an example of a process of filtering wastewater.

FIG. 2 is a schematic diagram of a main part showing an example of a plating step.

FIG. 3 is a flowchart illustrating an example of a plating process.

[Explanation of symbols]

 1 Storage tank 2 Separation tank 3 pH adjustment tank 4 Coagulation tank 5 Precipitation device 6a-6n Treatment tank 7 pH adjustment tank 700 Catalyst means 701 Cooler 8 Alkaline degreasing tank 9a-9n Washing with water 10 Acid tank 11a-11n Washing with water 12 Electrolytic washing 13 Galvanized 14a〜14n Rinse A Waste water B Treated water C Clear water C 1 Clear water C 'Clear water C'-1 Clear water D Tap water

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[Procedure amendment]

[Submission date] September 13, 2000 (2009.1)
3)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction contents]

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Wastewater from a plating treatment is treated in each tank (for example, from a storage tank to a separation tank, a pH adjustment tank (reaction tank), a flocculation tank, etc.), and then settled in a precipitation apparatus. Through a solid-liquid separation process. The treated water clarified by this precipitation apparatus is then guided to one or several treatment tanks, adjusted to pH, and converted to clarified water having a pH of 10 to 8. The activation treatment is performed in the storage tank and / or the activation treatment device. That is, by passing through a cartridge type container filled with ceramic balls useful for activation and fining of the clarified water, the metal such as iron in each tank in contact with the wastewater is adversely affected, that is, this kind of iron or the like It is possible to obtain excellent clarified water without stagnation, bad odor, etc., by controlling the corrosion of the water or the circulating water of the ceramic ball filtered water. In particular, the temperature of the wastewater should be around 17
The above-mentioned effect is maintained by maintaining the temperature in the range of C to 26C (15C to 20C).

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C23G 5/00 C23G 5/00 (72) Inventor Masatake Kano 1-206-1, Minato-ku, Nagoya-shi (72) Inventor Katsuyuki Sakakima 4-15 Shobocho, Minato-ku, Nagoya KS Rika Co., Ltd. (72) Inventor Satoshi Kaneko 2-25-16 Minamigaoka, Tsu-shi, Mie F-term (reference) 4D015 BA19 BB01 FA12 FA28 4D062 BA19 BB01 FA12 FA28 4K053 PA12 QA01 QA04 RA07 TA09 TA12 TA16 TA18 YA02 YA05 YA06 YA12

Claims (6)

[Claims] The wastewater used for the surface treatment is subjected to solid-liquid separation using a precipitator, and then a clear water having a pH of 10 to 8 is generated through pH adjustment. Approximately 17 degrees Celsius-26
The temperature is raised to about ℃ to generate heated temperature-clarified water, and the heated temperature-clarified water is subjected to an activation treatment through a catalyst means, and is used as a part of the cleaning water after the degreasing treatment. How to use water in surface treatment such as. 2. The wastewater used for the surface treatment is subjected to solid-liquid separation using a precipitator, and then, clarified water having a pH of 10 to 8 is produced through pH adjustment. Approximately 17 degrees Celsius-26
C. to raise the temperature to about ℃ to produce warmed clear water, maintain the salt concentration of the warmed clear water within the range of 10,000 to 17,000 μs (μs: microsiemens value), and activate A method of using water in a surface treatment such as a plating treatment in which a degreasing treatment is performed and the degreasing treatment is used for cleaning water. 3. The wastewater used for the surface treatment is subjected to solid-liquid separation using a precipitator, and then pH 10-8 clarified water and pH 8-6 clarified water are produced through pH adjustment. ~ 8 clarified water, to raise the temperature to about 17 ℃ ~ 26 ℃ to produce a heated clarified water, this heated clarified water is subjected to an activation treatment through a catalyst means, after the degreasing treatment Use for a part of washing water
The temperature of the clarified water having a pH of 8 to 6 is raised to approximately 17 ° C. to 26 ° C. to produce a heated clarified water, and the heated clarified water is subjected to an activation treatment through a catalyst means, followed by an acid washing treatment. And / or a method of using water in a surface treatment such as a plating treatment that is used as a part of cleaning water after a treatment such as an electrolytic treatment. 4. The wastewater used for the surface treatment is subjected to solid-liquid separation using a precipitation apparatus, and then purified water having a pH of 10 to 8 and clear water having a pH of 8 to 6 are produced through pH adjustment. ~ 8 clarified water is heated up to about 17 ° C ~ 26 ° C to generate heated clarified water, and the salt concentration of this warmed clarified water is 10,000 ~ 17,000μs
(Μs: microsiemens value), the activation treatment was carried out through a catalyst means to be used as washing water after the degreasing treatment, and the clarified water having a pH of 8 to 6 was substantially used.
The temperature is raised to about 17 ° C. to 26 ° C. to generate heated clarified water, and the catalyst concentration is maintained within a range of 10,000 to 17,000 μs (μs: microsiemens value) while maintaining the salt concentration of the heated clarified water. A method of using water in a surface treatment such as a plating treatment in which an activation treatment is performed through a means and used as cleaning water after treatments such as an pickling treatment and / or an electrolytic treatment. 5. The catalyst means according to claim 1, wherein the catalyst means is a ceramic wheel, a ceramic particle, a ceramic material or the like which comes into contact with and circulates with the clarified water and is useful for activating and clarifying the clarified water. 4. Use of water in surface treatment such as plating described in 4. 6. The container according to claim 1, wherein the catalyst means is a cartridge type container filled with ceramic balls, ceramic particles, ceramic materials, etc. useful for activating and clarifying clarifying water.
Use of water in surface treatment such as plating described in 1.