Anodic oxidation plating piece treatment system capable of recycling wastewater

Abstract

The invention discloses a wastewater reuse anodic oxidation plating piece treatment system, which belongs to the field of anodic oxidation plating pieces, and comprises a dyeing group, a dyeing washing group, a color fixing group, a hole sealing group, a hole sealing washing group and a drying group which are arranged in sequence, the system further comprises a demultiplexing processing group and a sharing processing group; each sub-use treatment group comprises a dyeing wastewater treatment line and a nickel-containing wastewater treatment line; dyeing wastewater and nickel-containing wastewater are treated in a classified mode, the dyeing wastewater is homogenized through an adjusting tank, preliminarily filtered through a first surface filter and subjected to dextrin removal, complex breaking and organic matter removal through an electrochemical tubular membrane electrode, when the dyeing wastewater is unqualified, effluent is merged into a combined treatment set, and after the nickel-containing wastewater is pretreated through the adjusting tank and a second surface filter, the effluent is discharged. Nickel ions are adsorbed through the nickel ion exchanger, nickel metal is recycled through follow-up treatment, then first-stage RO concentration desalination is conducted, produced water is recycled to a hole sealing washing set, water resources are recycled, waste is reduced, the defects of combined treatment are overcome, and nickel metal resources are recycled.

Description

Technical Field

[0001] The invention belongs to the technical field of anodized plated parts, and in particular relates to a wastewater recycling anodized plated parts processing system. Background Art

[0002] During the production process of the anodizing line, two types of wastewater, nickel-containing wastewater and dyeing wastewater, with different characteristics and pollution components, are generated.

[0003] Nickel-containing wastewater mainly comes from the water washing process after the sealing process, which contains a certain amount of nickel ions and a small amount of organic matter and other pollutants. If nickel ions are discharged directly without effective treatment, it will cause serious pollution to the environment, because nickel is a heavy metal and is difficult to degrade in the natural environment. It will accumulate in media such as water and soil, and have toxic effects on organisms in the ecosystem, affecting the growth, reproduction and survival of animals and plants, and may eventually endanger human health through the transmission of the food chain.

[0004] Dyeing wastewater comes from the post-dyeing washing process. It is characterized by containing dye ingredients (such as nickel-coordinated azo dyes, etc.) and dextrin and other substances, resulting in a high chemical oxygen demand (COD) in the wastewater. At the same time, due to the presence of nickel in the dye, it also contains a certain amount of nickel ions. This type of wastewater has high chromaticity and complex organic matter content. If it is discharged directly, it will change the color of the water, affect the light transmittance of the water, and then destroy the balance of the aquatic ecosystem. Moreover, the organic matter in it is difficult to degrade naturally, and it will consume the dissolved oxygen in the water, causing hypoxia in the water, suffocating aquatic organisms and causing serious damage to the water environment.

[0005] The wastewater generated by the existing anodized plating treatment system is often not classified and treated according to the characteristics of these two types of wastewater. For the mixed treatment of nickel-containing wastewater and dyeing wastewater, due to the complex composition of the wastewater, nickel ions can form stable complexes with organic matter in the dyeing wastewater, which greatly increases the difficulty of treatment. During the treatment process, it is necessary not only to remove the organic dyes, but also to destroy the complex ion structure, which usually requires more chemicals and complex treatment steps, resulting in a significant increase in treatment costs. At the same time, traditional processes may not be able to effectively recover valuable resources in the wastewater, such as nickel metal, during the treatment process, resulting in a waste of resources. Summary of the invention

[0006] The purpose of the present invention is to provide a wastewater recycling anodizing plating treatment system to solve the problem that nickel-containing wastewater and dyeing wastewater are not classified and treated according to their quality, and valuable resources in the wastewater cannot be effectively recovered during the treatment process.

[0007] To achieve the above object, the present invention provides the following technical solutions: a wastewater recycling anodized plated parts treatment system, comprising a dyeing group, a dyeing water washing group, a color fixing group, a sealing group, a sealing water washing group and a drying group arranged in sequence;

[0008] Also included are split treatment groups and combined treatment groups;

[0009] The separate treatment group includes a dyeing wastewater treatment line and a nickel-containing wastewater treatment line;

[0010] The dyeing wastewater treatment line includes a dyeing wastewater regulating tank, a No. 1 surface filter, an electrochemical tubular membrane electrode and a monitoring water tank; the nickel-containing wastewater treatment line includes a nickel-containing wastewater regulating tank;

[0011] The combined treatment group includes a second surface filter, a nickel ion exchanger and a primary RO, wherein the nickel ion exchanger is sequentially connected to an eluent tank and an electrodeposition system, and metallic nickel is recovered through the electrodeposition system;

[0012] The outlet water of the monitoring water pool is connected to the water washing group and the second surface filter respectively, and the produced water of the first-level RO enters the sealing water washing group.

[0013] Furthermore, the primary RO concentrate is transported to a nickel monitoring tank.

[0014] Furthermore, the dyeing wastewater stays in the dyeing wastewater regulating tank for 8 to 24 hours, and a stirring device is provided in the dyeing wastewater regulating tank.

[0015] Furthermore, the first surface filter and the second surface filter are respectively a two-stage surface filter and a three-stage surface filter.

[0016] Furthermore, the eluent in the eluent box is a nickel sulfate solution.

[0017] Furthermore, the internal pH value of the nickel ion exchanger is 5-6.

[0018] Furthermore, the nickel ion exchanger has an operating flow rate of 5 to 25 m / h, the resin in the nickel ion exchanger is a chelating resin, the working exchange capacity is 650 to 750 mmol / LR, and the resin operation cycle is 24 to 36 hours.

[0019] Furthermore, the primary RO recovery rate is set to 80%.

[0020] Furthermore, the electrochemical tubular membrane electrode adopts an oxidant coating, and the electrochemical tubular membrane electrode directly oxidizes the organic matter in the wastewater under power-on conditions. At the same time, the electrochemical tubular membrane electrode can release a variety of oxidizing factors to achieve indirect oxidation of the organic matter in the wastewater.

[0021] Furthermore, the wastewater recovery rate in the wastewater recycling anodized plating treatment system is greater than 80%.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The dyeing wastewater and nickel-containing wastewater are classified and treated. The dyeing wastewater is homogenized in the regulating tank, preliminarily filtered by the No. 1 surface filter, and subjected to electrochemical tubular membrane electrode to remove dextrin, break the chelate, and remove organic matter. The water quality is monitored in the monitoring pool. When the treated water meets the requirements, it can be directly reused in the dyeing water washing group. When it is unqualified, the effluent is merged into the combined treatment group. The nickel-containing wastewater is pretreated by the regulating tank and the No. 2 surface filter, and then adsorbed by the nickel ion exchanger and subsequently treated to recover nickel metal. It is then concentrated and desalted by the first-level RO, and the produced water is reused in the sealing water washing group, thus realizing the recycling of water resources, reducing waste, avoiding the disadvantages of combined treatment, improving the comprehensive benefits of wastewater treatment, and recovering nickel metal resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the anodized plating treatment system for wastewater reuse. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the embodiments.

[0026] The following examples are used to illustrate the present invention, but they cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions. Simple improvements to the method of the present invention under the premise of the concept of the present invention belong to the scope of protection claimed in the present invention.

[0027] See also Figure 1 The present invention provides a wastewater recycling anodized plated parts treatment system, comprising a primary dyeing group, a primary dyeing water washing group, a secondary dyeing group, a secondary dyeing water washing group, a color fixing group, a sealing group, a sealing water washing group and a drying group which are arranged in sequence.

[0028] The dyeing wastewater generated by the primary dyeing washing group, secondary dyeing washing group and fixing group enters the dyeing wastewater treatment line.

[0029] The dyeing wastewater treatment line consists of a dyeing wastewater regulating tank, a No. 1 surface filter, an electrochemical tubular membrane electrode and a monitoring water tank. After being discharged from the dyeing wastewater regulating tank, the dyeing wastewater passes through the No. 1 surface filter and the electrochemical tubular membrane electrode in sequence and then enters the monitoring water tank. The effluent TDS is reused as dyeing rinsing water if it meets the requirements of rinsing water. If it does not meet the requirements, it enters the shared treatment group.

[0030] The electrochemical tubular membrane electrode adopts a tube-in-tube design. The coating surface is crystal-smooth, the grains are evenly distributed, densely combined, without cracks, and evenly distributed with holes of uniform size. The size of the pores is between 2-3 microns. The electrode tube wall has pores for the flow of wastewater, which enables the electrode to have membrane filtration function while performing electrocatalytic oxidation.

[0031] The electrochemical tubular membrane electrode adopts an oxidant coating. Under the condition of power supply, it can realize both direct oxidation and indirect oxidation. In the anode area of ​​the tubular membrane electrode, the external electric field makes the electrode surface produce strong oxidizing ability. The organic matter in the wastewater is oxidized on the anode surface and decomposed into small molecules, or even completely mineralized into carbon dioxide and water. The tubular membrane electrode can release a variety of oxidizing factors, not only hydroxyl free radicals, but also direct oxidation and other active ions, such as ·Cl, ·ClO, ·H, ·O, etc. for oxidation reactions. The above synergistic effects can simultaneously realize the decomposition reaction and achieve the removal of organic matter.

[0032] The nickel-containing wastewater generated by the sealing and washing group enters the nickel wastewater regulating tank, and the nickel-containing wastewater is discharged from the nickel-containing wastewater regulating tank and then enters the combined treatment group.

[0033] The combined treatment group includes a No. 2 surface filter, a nickel ion exchanger and a primary RO (primary reverse osmosis device), and the nickel ion exchanger is connected to the eluent tank and the electrodeposition system in sequence; the nickel ion exchanger completely adsorbs and intercepts nickel in the wastewater. When the ion exchange resin in the nickel ion exchanger adsorbs nickel ions to a saturated state, a regeneration operation is required, and dilute sulfuric acid flows into the nickel ion exchanger to elute the adsorbed nickel ions to form an eluent (nickel sulfate) rich in nickel ions. The eluent (nickel sulfate) flows into the eluent tank for collection, and then the eluent (nickel sulfate) is used to recover nickel metal through the electrodeposition system; the primary RO concentrate is transported to the nickel monitoring pool, and the wastewater treated by the nickel ion exchanger enters the primary RO (reverse osmosis) system for concentration, and the produced water is reused to the flushing section of the sealing water washing group after the sealing hole is sealed, with a recovery rate of 80%, and the concentrate is discharged after being monitored by the nickel monitoring pool and qualified;

[0034] The No. 1 surface filter and the No. 2 surface energy filter adopt a two-stage surface filter and a three-stage surface filter respectively.

[0035] The dyeing wastewater and nickel-containing wastewater are classified and treated. The dyeing wastewater is homogenized in the regulating tank, preliminarily filtered by the No. 1 surface filter, and subjected to electrochemical tubular membrane electrode to remove dextrin, break the chelate, and remove organic matter. The water quality is monitored in the monitoring pool. When the treated water meets the requirements, it can be directly reused in the dyeing water washing group. When it is unqualified, the effluent is merged into the combined treatment group. The nickel-containing wastewater is pretreated by the regulating tank and the No. 2 surface filter, and then adsorbed by the nickel ion exchanger and subsequently treated to recover the nickel metal. It is then concentrated by the first-level RO, and the produced water is reused in the sealing water washing group, thus realizing the recycling of water resources, reducing waste, avoiding the disadvantages of combined treatment, improving the comprehensive benefits of wastewater treatment, and recovering nickel metal resources.

[0036] The working principle of the present invention is as follows: the dyeing wastewater first enters the dyeing wastewater regulating tank for collection, and the residence time in the dyeing wastewater regulating tank is 8 to 24 hours. A hyperbolic mixer is arranged in the dyeing wastewater regulating tank to prevent the particles in the wastewater from settling to the bottom of the tank. The effluent from the dyeing wastewater regulating tank passes through a No. 1 surface filter to remove the suspended particles in the wastewater. Large particle size pollutants are intercepted by the filter, and small particle size pollutants and dyeing colloids are removed through subsequent processes. The No. 1 surface filter element adopts a spray filter element with a filtration pore size of 100 microns and 50 microns. The filter element can be replaced according to the water quality. The replacement cycle of the first-stage surface filter element is 3 to 7 days, the replacement cycle of the second-stage surface filter element is 7 to 15 days, and the replacement cycle of the third-stage filter element is 15 to 30 days. The replaced filter element is outsourced as hazardous waste for disposal;

[0037] The effluent from the No. 1 surface filter is treated by an electrochemical tubular membrane electrode. The electrochemical tubular membrane electrode couples electrocatalytic oxidation technology with membrane filtration technology, and utilizes the qualitative flow characteristics of membrane filtration to forcibly improve the mass transfer efficiency of pollutants on the electrode surface. Under power-on conditions, a large amount of OH (hydroxyl radicals) will be generated on the surface of the Ti-RuO2 active material to undergo a complex breaking reaction. The tubular membrane electrode has a mesh structure, and the electrode surface pore size is controllable, ranging from 1 to 20 microns. The voltage setting range is 5 to 15 V, and the total current setting range of a single device is 0 to 2000 A. The pH range is 5 to 6. The effluent from the electrochemical tubular membrane electrode is transported to a monitoring pool. The effluent TDS is reused as dyeing rinsing water on the premise that it meets the requirements of rinsing water. If it does not meet the requirements, it enters the No. 2 surface filter of the nickel-containing wastewater for further recycling and treatment.

[0038] The nickel-containing wastewater is first collected in the nickel-containing wastewater regulating tank. The retention time of the nickel-containing wastewater regulating tank is 8 to 24 hours. The nickel-containing wastewater regulating tank is equipped with a hyperbolic mixer to homogenize the wastewater through stirring. The effluent from the nickel-containing wastewater regulating tank passes through the No. 2 surface filter to remove suspended particles in the wastewater. The No. 2 surface filter uses a spray filter element with a filtration pore size of 100 microns, 50 microns and 10 microns. The filter element is replaced according to the water quality, and the replaced filter element is treated as hazardous waste outsourced for disposal;

[0039] The effluent from the No. 2 surface filter enters the nickel ion exchanger. Under the acidic conditions of Ph5-6, the Ni2+ in the water is replaced by the Na+ in the resin exchange agent to the cation exchange resin, and some salt is removed at the same time. The operating flow rate of the nickel ion exchanger is 5-25m / h. The resin uses chelating resin with a working exchange capacity of 650-750mmo l / LR. The resin operation cycle is 24-36h. After the wastewater is treated by ion exchange, the effluent enters the first-level RO concentration, and the produced water is reused to the sealing and flushing section of the production line with a recovery rate of 80%. The concentrated liquid is discharged after passing the monitoring of the nickel monitoring pool.

[0040] Dilute sulfuric acid flows into the nickel ion exchanger to elute the adsorbed nickel ions to form an eluent (nickel sulfate) rich in nickel ions. The eluent (nickel sulfate) flows into the eluent tank for collection, and then the eluent (nickel sulfate) is used to recover nickel metal through the electrodeposition system. Valuable metal ions are separated from the electrolytic solution through selective electrolysis and adsorbed onto the cathode plate to produce a cathode nickel tube. Nickel is sold to the outside as a valuable metal. The wastewater recovery rate generated by this system is greater than 80%.

[0041] Embodiment 1:

[0042] The production process of aluminum alloy electronic components is degreasing-water washing-alkali biting-water washing-chemical polishing-water washing-anodized plating-primary dyeing-primary dyeing water washing-secondary dyeing-secondary dyeing water washing-color fixation-sealing-sealing water washing-drying; the dye is a nickel-coordinated azo dye containing dextrin, and the water washing after dyeing is classified as dyeing wastewater, and the total water volume of dyeing wastewater is 150m 3 / d, COD≤300mg / L, total nickel≤40mg / L, after sealing, the water washing is classified as nickel-containing wastewater, the water volume is 150m 3 / d, COD≤100mg / L, total nickel≤30mg / L.

[0043] The dyeing wastewater first enters the dyeing wastewater regulating tank for collection. The dyeing wastewater regulating tank has a retention time of 12 hours. The dyeing wastewater regulating tank is equipped with a hyperbolic mixer to prevent the particles in the wastewater from settling to the bottom of the tank. The effluent from the dyeing wastewater regulating tank passes through the No. 1 surface filter to remove the suspended particles in the wastewater. The No. 1 surface filter element adopts a spray filter element with a filtration aperture of 100 microns and 50 microns respectively. The flow rate of a single filter element is ≤1m 3 / h;

[0044] The effluent from the No. 1 surface filter is treated by an electrochemical tubular membrane electrode to break the complex nickel in the dyeing wastewater. The voltage is set at 10V and the current is set at 30mA / cm2. The effluent is pumped to the monitoring pool. The effluent TDS is reused for dyeing rinsing if it meets the requirements of rinsing water. If it does not meet the requirements, it will enter the No. 2 surface filter system for nickel-containing wastewater.

[0045] The nickel-containing wastewater is first collected in the nickel-containing wastewater regulating tank. The residence time of the nickel-containing wastewater regulating tank is 12 hours. A hyperbolic mixer is installed in the nickel-containing wastewater regulating tank to homogenize the wastewater. The effluent from the nickel-containing wastewater regulating tank passes through the No. 2 surface filter to remove suspended particles in the wastewater. The nickel-containing wastewater filter uses a spray filter element with filtration pore sizes of 100 microns, 50 microns and 10 microns respectively. The flow rate of a single filter element is ≤1m 3 / h; the effluent from the No. 2 surface filter enters the nickel ion exchanger, and the eluent (nickel sulfate) is electroplated to recover metallic nickel; under acidic conditions, the Ni2+ in the water is replaced by the Na+ in the resin exchange agent onto the cation exchange resin, and part of the salt is removed at the same time. The pH range is 5-6. The nickel ion exchanger resin uses chelating resin. The operating flow rate of the nickel ion exchanger is 10m / h, the resin exchange capacity is 700mmo l / LR, the regeneration time is 36h, the nickel ion exchanger has a diameter of 1.3m, and the nickel concentration in the nickel ion exchanger regeneration liquid is 21.5g / L. 10.75kg of nickel can be produced every day through the electroplating system.

[0046] The effluent from the nickel ion exchanger enters the primary RO system. The recovery rate of the primary RO system is 80%. The produced water can be reused in the sealing and flushing section. The system reuse water volume is about 240-270m 3 / d, the concentrated water is discharged through the nickel monitoring pool, and the concentrated water discharge volume is about 30~60m 3 / d.

[0047] Embodiment 2:

[0048] The production process of aluminum parts for furniture products is degreasing-water washing-chemical polishing-water washing-alkali washing-water washing-anodized parts-primary dyeing-primary dyeing water washing-secondary dyeing-secondary dyeing water washing-color fixing-sealing-sealing water washing-drying; the dye is a nickel-coordinated azo dye containing dextrin, and the water washing after dyeing is classified as dyeing wastewater, with a water volume of 300m 3 / d, COD≤500mg / L, total nickel≤45mg / L, after sealing, the water washing is classified as nickel-containing wastewater, the water volume is 220m 3 / d, COD≤120mg / L, total nickel≤45mg / L.

[0049] The dyeing wastewater first enters the dyeing wastewater regulating tank for collection. The dyeing wastewater regulating tank has a retention time of 12 hours. The dyeing wastewater regulating tank is equipped with a hyperbolic mixer to prevent the particles in the wastewater from settling to the bottom of the tank. The effluent from the dyeing wastewater regulating tank passes through the No. 1 surface filter to remove the suspended particles in the wastewater. The No. 1 surface filter element adopts a spray filter element with a filtration aperture of 100 microns and 50 microns respectively. The flow rate of a single filter element is ≤1m 3 / h;

[0050] The effluent from the No. 1 surface filter passes through the electrochemical tubular membrane electrode to break the complex nickel in the dyeing wastewater. The voltage is set at 10V and the current is set at 29mA / cm2. The effluent is pumped to the monitoring pool. The effluent TDS is reused for dyeing rinsing if it meets the requirements of rinsing water. If it does not meet the requirements, it enters the No. 2 surface filter system for nickel-containing wastewater.

[0051] The nickel-containing wastewater is first collected in the nickel-containing wastewater regulating tank. The residence time of the nickel-containing wastewater regulating tank is 12 hours. A hyperbolic mixer is installed in the nickel-containing wastewater regulating tank to homogenize the wastewater. The effluent from the nickel-containing wastewater regulating tank passes through the No. 2 surface filter to remove suspended particles in the wastewater. The No. 2 surface filter uses a spray filter element with filtration pore sizes of 100 microns, 50 microns and 10 microns respectively. The flow rate of a single filter element is ≤1m 3 / h; the effluent from the No. 2 surface filter enters the nickel ion exchanger, and the eluent (nickel sulfate) adopts the electrodeposition process to recover the metallic nickel. Under acidic conditions, the Ni2+ in the water is replaced by the Na+ in the resin exchange agent to the cation exchange resin, and part of the salt is removed at the same time. The pH range is 5-6. The nickel ion exchange resin adopts chelating resin. The operating flow rate of the nickel ion exchanger is 10m / h, the resin exchange capacity is 700mmo l / LR, the regeneration time is 36h, the diameter of the nickel ion exchanger is 1.7m, and the nickel concentration in the nickel ion exchanger regeneration liquid is 19.5g / L. The electrodeposition system can produce 23.4kg of nickel every day.

[0052] The effluent from the nickel ion exchanger enters the primary RO system. The recovery rate of the primary RO system is 80%. The produced water can be reused in the sealing and flushing section. The system reuse water volume is about 416-476m 3 / d, the concentrated water is discharged through the nickel monitoring pool, and the concentrated water discharge volume is about 44~104m 3 / d.

[0053] The above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the embodiments of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description, and these obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A wastewater recycling anodizing plating treatment system, characterized by: It includes a dyeing group, a dyeing and washing group, a color fixing group, a sealing group, a sealing and washing group and a drying group which are arranged in sequence; Also included are split treatment groups and combined treatment groups; The separate treatment group includes a dyeing wastewater treatment line and a nickel-containing wastewater treatment line; The dyeing wastewater treatment line includes a dyeing wastewater regulating tank, a No. 1 surface filter, an electrochemical tubular membrane electrode and a monitoring water tank; the nickel-containing wastewater treatment line includes a nickel-containing wastewater regulating tank; The combined treatment group includes a second surface filter, a nickel ion exchanger and a primary RO, wherein the nickel ion exchanger is sequentially connected to an eluent tank and an electrodeposition system, and the eluent is passed through the electrodeposition system to recover metallic nickel; The outlet water of the monitoring water pool is connected to the water washing group and the second surface filter respectively, and the produced water of the first-level RO enters the sealing water washing group.

2. A wastewater recycling anodizing plating treatment system according to claim 1, characterized in that: The primary RO concentrate is transported to the nickel monitoring tank.

3. A wastewater recycling anodizing plating treatment system according to claim 1, characterized in that: The dyeing wastewater stays in the dyeing wastewater regulating tank for 8 to 24 hours, and a stirring device is arranged in the dyeing wastewater regulating tank.

4. A wastewater recycling anodizing plating treatment system according to claim 1, characterized in that: The first surface filter and the second surface filter are multi-stage surface filters.

5. A wastewater recycling anodizing plating treatment system according to claim 1, characterized in that: The eluent in the eluent box is a nickel sulfate solution.

6. A wastewater recycling anodizing plating treatment system according to claim 1, characterized in that: The internal pH value of the nickel ion exchanger is 5-6.

7. A wastewater recycling anodizing plating treatment system according to claim 1, characterized in that: The nickel ion exchanger has an operating flow rate of 5 to 25 m / h, a chelating resin is used as the resin in the nickel ion exchanger, a working exchange capacity of 650 to 750 mmol / LR, and a resin operating cycle of 24 to 36 hours.

8. The wastewater recycling anodizing plating treatment system according to claim 1 is characterized by: The primary RO recovery rate was set to 80%.

9. A wastewater recycling anodizing plating treatment system according to claim 1, characterized in that: The electrochemical tubular membrane electrode adopts an oxidant coating. The electrochemical tubular membrane electrode directly oxidizes organic matter in the wastewater under power-on conditions. At the same time, the electrochemical tubular membrane electrode can release multiple oxidizing factors to achieve indirect oxidation of organic matter in the wastewater.

10. A wastewater recycling anodizing plating treatment system according to claim 1, characterized in that: The wastewater recovery rate in the wastewater recycling anodized plated parts treatment system is greater than 80%.

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