CN203768178U - A circuit board production ink wastewater treatment system - Google Patents

Abstract

The utility model discloses a circuit board production printing ink effluent disposal system, include: the system comprises a raw water collecting tank, a reaction tank, a filter press, a Fenton oxidation/ultraviolet tank, an electrolytic tank, a membrane filtering device and a biochemical tank, wherein the raw water collecting tank is used for guiding raw water of printing ink wastewater produced in circuit board production into the raw water collecting tank for water quality balancing, the reaction tank is used for adjusting the pH value and performing coagulation to form a muddy water mixed solution, the filter press is used for performing solid-liquid separation on the muddy water mixed solution, the Fenton oxidation/ultraviolet tank is used for performing oxidation reaction and ultraviolet degradation on filtrate generated by the filter press, the electrolytic tank is used for electrolyzing the wastewater, the membrane filtering device is used for removing suspended matters and macromolecular substances, and the biochemical tank is used for performing domestic; the treatment system can effectively remove COD, ammonia nitrogen, total phosphorus and heavy metals in the circuit board production ink wastewater, effectively prevent membrane pollution, can continuously and effectively treat the wastewater, and ensure that the final drainage of the circuit board production ink wastewater can reach the first-level standard of Guangdong water-saving pollutant discharge limit (DB 44/26-2001).

Description

A circuit board production ink wastewater treatment system

technical field

The utility model relates to the technology in the field of waste water treatment, in particular to a waste water treatment system for ink produced by circuit boards.

Background technique

At present, the methods of ink wastewater treatment mainly include electrochemical method, coagulation sedimentation method, ultrafiltration method, biochemical method and other methods and their combination processes. In the prior art, there is a combined process of "solid-liquid separation system + internal electrolysis system + biochemical system" to treat ink wastewater generated by water-based printing, and there is also a combination of "coagulation + filter press + membrane filtration + advanced treatment + waste liquid recovery" Process treatment of ink wastewater in the carton packaging industry. However, the composition and treatment methods of ink wastewater in various industries are different, and the treatment effects are also different. The ink-containing wastewater generated in the production process of circuit boards is difficult to treat. Industrial wastewater, its COD, SS, high chroma, poor biodegradability. The coagulation process used in the prior art cannot meet the ink-containing wastewater generated in the production process of circuit boards. If only the coagulation process of the prior art is used, it is not only difficult to remove the suspended ink and other insoluble inks in the wastewater. Macromolecular organic matter, and has a greater impact on the subsequent solid-liquid separation process, that is, the filter press effect, and at the same time, it is more likely to cause membrane fouling, i.e. membrane clogging, etc. in the subsequent membrane filtration process, which is not conducive to the long-term operation and operation of the wastewater treatment process. The maintenance of equipment leads to low efficiency and poor effect of wastewater treatment; in addition, in the existing comprehensive wastewater treatment process, the degradation of macromolecular organic matter is also a major problem in wastewater treatment. How to ensure the effective degradation of macromolecular organic matter and at the same time effectively prevent Membrane fouling caused by subsequent membrane filtration makes the entire wastewater treatment process more durable and sustainable, which is an important problem that needs to be solved urgently in the prior art.

Utility model content

In view of this, the utility model aims at the shortcomings of the prior art, and its main purpose is to provide a treatment method for ink wastewater from circuit board production, which can effectively remove COD, ammonia nitrogen, total phosphorus and heavy metals in ink wastewater from circuit board production , effectively prevent membrane fouling, can continuously and effectively carry out wastewater treatment, and ensure that the final drainage of ink wastewater from circuit board production can meet the first-level standard of Guangdong Province's water pollutant discharge limit (DB44/26-2001).

In order to achieve the above object, the utility model adopts the following technical scheme: a circuit board production ink wastewater treatment system, including:

The raw water collection pool used to import the raw water of the printed circuit board production ink wastewater into the raw water collection pool for water quality balance;

A reaction tank for adjusting the pH value and coagulating to form a mud-water mixture;

Filter press for solid-liquid separation of mud-water mixture;

Fenton Oxidation/UV tank for oxidation reaction and UV degradation of the filtrate produced by the filter press;

electrolytic cells for the electrolysis of waste water;

Membrane filtration units for removal of suspended solids and macromolecules; and

A biochemical pool used for domestic treatment of filtered water after membrane filtration to further remove ammonia nitrogen, total phosphorus, COD, and SS;

The raw water outlet of the raw water collection tank is connected with the reaction tank water inlet of the reaction tank, the water outlet of the reaction tank is connected with the filter press liquid inlet of the filter press, and the filtrate outlet of the filter press is connected with the Fenton oxidation/ultraviolet The oxidation ultraviolet water inlet of the pool is connected, the oxidation ultraviolet water outlet of the Fenton oxidation/ultraviolet pool is connected with the electrolysis water inlet in the electrolytic cell, the electrolysis water outlet of the electrolytic cell is connected with the membrane filtration water inlet of the membrane filtration device, and the membrane filtration device The water outlet of the membrane filtrate is connected with the biochemical water inlet of the biochemical pool, and the concentrate outlet of the membrane filtration device is connected with the raw water collection pool.

As a preferred solution, the membrane filtration device is a TMF tubular membrane filtration device.

As a preferred solution, the anode in the electrolytic cell is an iron rod or an aluminum rod.

As a preferred solution, the biochemical tank can use a biological remediation and oxidation tank, a biological aerated filter or a membrane bioreactor.

As a preferred solution, the filter press is a plate and frame filter press.

As a preferred solution, the filter press is also provided with a mud discharge port.

As a preferred solution, an ultraviolet photodegradation reactor is provided in the Fenton oxidation/ultraviolet pool.

Compared with the prior art, the utility model has obvious advantages and beneficial effects. This system is a wastewater treatment system for treating high-concentration ink wastewater generated in the production process of circuit boards. By setting a reaction pool, and in the reaction pool The coagulation reaction of wastewater can effectively remove suspended ink and other insoluble macromolecular organic matter, making it form large particle flocs to facilitate solid-liquid separation, and filter the mud-water mixture through a filter press to effectively remove large particles. Molecularly insoluble organic matter, while greatly reducing membrane fouling in subsequent membrane filtration devices.

On the other hand, by adopting the Fenton oxidation/ultraviolet and electrolysis process, it can effectively remove ammonia nitrogen, total phosphorus, COD, etc. in the wastewater, oxidize and degrade macromolecular organic matter, and turn it into small molecular organic matter. Through the above two reaction pools It can also effectively reduce the membrane pollution in the subsequent membrane filtration device, make the membrane filtration efficiency higher, and greatly improve the service life of the membrane filtration device in the subsequent treatment; through membrane filtration, further reduce the chroma, SS, COD and other indicators; finally Through biochemical treatment, ensure that the ammonia nitrogen, total phosphorus, chroma, SS, COD, etc. in the wastewater meet the first-level standard of the discharge limit of water pollutants in Guangdong Province (DB44/26-2001).

Description of drawings

Fig. 1 is an assembly perspective view of an embodiment of the present invention.

Detailed ways

Please refer to shown in Fig. 1, it has shown the concrete structure of the preferred embodiment of the present utility model, a kind of circuit board production ink waste water treatment system includes:

The raw water collection pool used to import the raw water of the printed circuit board production ink wastewater into the raw water collection pool for water quality balance;

A reaction tank for adjusting the pH value and coagulating to form a mud-water mixture;

Filter press for solid-liquid separation of mud-water mixture;

Fenton Oxidation/UV tank for oxidation reaction and UV degradation of the filtrate produced by the filter press;

electrolytic cells for the electrolysis of waste water;

Membrane filtration units for removal of suspended solids and macromolecules; and

A biochemical pool used for domestic treatment of filtered water after membrane filtration to further remove ammonia nitrogen, total phosphorus, COD, and SS;

The raw water outlet of the raw water collection tank is connected with the reaction tank water inlet of the reaction tank, the water outlet of the reaction tank is connected with the filter press liquid inlet of the filter press, and the filtrate outlet of the filter press is connected with the Fenton oxidation/ultraviolet The oxidation ultraviolet water inlet of the pool is connected, the oxidation ultraviolet water outlet of the Fenton oxidation/ultraviolet pool is connected with the electrolysis water inlet in the electrolytic cell, the electrolysis water outlet of the electrolytic cell is connected with the membrane filtration water inlet of the membrane filtration device, and the membrane filtration device The water outlet of the membrane filtrate is connected with the biochemical water inlet of the biochemical pool, and the concentrate outlet of the membrane filtration device is connected with the raw water collection pool.

The membrane filtration device is a TMF tubular membrane filtration device.

The anode in the electrolytic cell is an iron rod or an aluminum rod.

The biochemical pool can be a bio-decomposition oxidation pool or aerated biological filter or membrane bioreactor.

The filter press is a plate and frame filter press.

The filter press is also provided with a mud discharge port.

The Fenton oxidation/ultraviolet pool is provided with an ultraviolet photodegradation reactor.

Describe the wastewater treatment method of this circuit board production ink wastewater treatment system in detail, specific examples are as follows:

Example 1

A method for treating ink wastewater produced by circuit boards, comprising the steps of:

S1. Raw water collection pool: firstly, import the raw water of circuit board production ink wastewater into the raw water collection pool for water quality balance, and then pump it into S2, reaction pool;

S2. Reaction tank: The wastewater after the water quality balance in the raw water collection tank is adjusted in the reaction tank to make the pH value of the wastewater 3.0. At the same time, a coagulant is added to the reaction tank. The amount of the coagulant added is 3mg/ L; the coagulant is powdered activated carbon particles, the fineness of the powdered activated carbon particles is 130-200 mesh, stirred and mixed to form a mud-water mixture of flocs;

S3, filter press: use a pump to send the mud-water mixture in the reaction tank into the plate-and-frame filter press, perform solid-liquid separation on the mud-water mixture, transport the filter residue outside, and pump the filtrate into S4, Fenton oxidation/ultraviolet pool;

S4, Fenton oxidation/ultraviolet pool: add hydrogen peroxide and ferrous sulfate to the filtrate to perform Fenton reaction, and then send the wastewater after the oxidation reaction into the ultraviolet degradation reactor to degrade the wastewater by ultraviolet light, and the wastewater degraded by ultraviolet light Go directly to the next electrolysis process;

S5. Electrolytic cell: The electrolytic cell adopts a continuous high-frequency pulse electrolysis device, and the reaction time is 0.3 hours; adjust the pH value of the wastewater after the electrolytic treatment, and after the pH value of the wastewater reaches 9.8, continue to add powdered activated carbon particles, add the After powdered activated carbon particles, it can effectively prevent the subsequent membrane clogging in the membrane filtration device, the addition amount is 0.5mg/L, and it is sent into the membrane filtration device by a pump;

S6. Membrane filtration device: the pumped wastewater is passed through the TMF roll-type membrane filtration device to remove suspended solids and macromolecular substances to obtain membrane filtration wastewater, and the pH value is adjusted. The pH value in the step S6 is 6.5. Then pump it into the biochemical pool;

S7. Biochemical tank: further remove ammonia nitrogen, total phosphorus, COD, and SS from the wastewater obtained in step S6 through biochemical treatment. The biochemical system can use a biological aerated filter or a membrane bioreactor.

In the above steps S2 and S6, sulfuric acid or sodium hydroxide is used to adjust the pH value of the waste water.

The addition amount of Fenton oxidation/ultraviolet in described step S4 is the 30% hydrogen peroxide of 200g ferrous sulfate and 2L per ton of waste water, and the reaction time is 20 minutes; Adopt ultraviolet light irradiation, irradiation time is 30 minutes.

The anode in the electrolytic cell is an iron rod, the current is set to 150A, and the voltage is set to 15 volts.

Fillers are installed in the biochemical pool; the fillers are one or more of polyethylene suspension spherical fillers, soft fillers, semi-soft fillers, soft and semi-soft combined fillers, and three-dimensional elastic fillers.

Example 2

A method for treating ink wastewater produced by circuit boards, comprising the steps of:

S1. Raw water collection pool: firstly, import the raw water of circuit board production ink wastewater into the raw water collection pool for water quality balance, and then pump it into S2, reaction pool;

S2. Reaction tank: The wastewater after the water quality balance in the raw water collection tank is adjusted in the reaction tank to make the pH value of the wastewater 2.6. At the same time, a coagulant is added to the reaction tank. The amount of the coagulant added is 4mg/ L; the coagulant is a mixture of powdered activated carbon particles, aluminum sulfate, and ferrous sulfate, and the mass ratio of each component is powdered activated carbon particles: aluminum sulfate: ferrous sulfate=1:1:1, the powdery The fineness of activated carbon particles is 130-200 mesh, stirring and mixing to form a mud-water mixture of flocs;

S3, filter press: use a pump to send the mud-water mixture in the reaction tank into the plate-and-frame filter press, perform solid-liquid separation on the mud-water mixture, transport the filter residue outside, and pump the filtrate into S4, Fenton oxidation/ultraviolet pool;

S4, Fenton oxidation/ultraviolet pool: add hydrogen peroxide and ferrous sulfate to the filtrate to perform Fenton reaction, and then send the wastewater after the oxidation reaction into the ultraviolet degradation reactor to degrade the wastewater by ultraviolet light, and the wastewater degraded by ultraviolet light Go directly to the next electrolysis process;

S5. Electrolytic cell: The electrolytic cell adopts a continuous high-frequency pulse electrolysis device, and the reaction time is 0.3 hours; adjust the pH value of the wastewater after the electrolytic treatment, and after the pH value of the wastewater reaches 9.8, continue to add powdered activated carbon particles, add the After powdered activated carbon particles, it can effectively prevent the subsequent membrane clogging in the membrane filtration device, the addition amount is 1mg/L, and it is sent into the membrane filtration device by a pump;

S6. Membrane filtration device: the pumped wastewater is passed through the TMF roll-type membrane filtration device to remove suspended solids and macromolecular substances to obtain membrane-filtered wastewater, and the pH value is adjusted. The pH value in the step S6 is 7. Then pump it into the biochemical pool;

S7. Biochemical tank: further remove ammonia nitrogen, total phosphorus, COD, and SS from the wastewater obtained in step S6 through biochemical treatment. The biochemical system can use a biological aerated filter or a membrane bioreactor.

In the above steps S2 and S6, sulfuric acid or sodium hydroxide is used to adjust the pH value of the waste water.

In the step S4, the amount of Fenton oxidation/ultraviolet addition is to add 200g of ferrous sulfate and 2L of 30% hydrogen peroxide per ton of waste water, and the reaction time is 30 minutes; the ultraviolet lamp is used for irradiation, and the irradiation time is 40 minutes.

The anode in the electrolytic cell is an iron rod, the current is set to 150A, and the voltage is set to 15 volts.

Fillers are installed in the biochemical pool; the fillers are one or more of polyethylene suspension spherical fillers, soft fillers, semi-soft fillers, soft and semi-soft combined fillers, and three-dimensional elastic fillers.

Example 3

A method for treating ink wastewater produced by circuit boards, comprising the steps of:

S1. Raw water collection pool: firstly, import the raw water of circuit board production ink wastewater into the raw water collection pool for water quality balance, and then pump it into S2, reaction pool;

S2. Reaction tank: The wastewater after the water quality balance in the raw water collection tank is adjusted in the reaction tank to make the pH value of the wastewater 2.9. At the same time, a coagulant is added to the reaction tank. The amount of the coagulant added is 5mg/ L; the coagulant is formed by mixing powdered activated carbon particles and ferric chloride at a mass ratio of 1:1, the fineness of the powdered activated carbon particles is 130-200 mesh, stirred and mixed to form a mud-water mixture of flocs ;

S3, filter press: use a pump to send the mud-water mixture in the reaction tank into the plate-and-frame filter press, perform solid-liquid separation on the mud-water mixture, transport the filter residue outside, and pump the filtrate into S4, Fenton oxidation/ultraviolet pool;

S4, Fenton oxidation/ultraviolet pool: add hydrogen peroxide and ferrous sulfate to the filtrate to perform Fenton reaction, and then send the wastewater after the oxidation reaction into the ultraviolet degradation reactor to degrade the wastewater by ultraviolet light, and the wastewater degraded by ultraviolet light Go directly to the next electrolysis process;

S5. Electrolytic cell: The electrolytic cell adopts a continuous high-frequency pulse electrolysis device, and the reaction time is 0.6 hours; adjust the pH value of the wastewater after the electrolytic treatment, and after the pH value of the wastewater reaches 9.8, continue to add powdered activated carbon particles, add the After powdered activated carbon particles, it can effectively prevent the subsequent membrane clogging in the membrane filtration device, the addition amount is 1.5mg/L, and it is sent into the membrane filtration device by a pump;

S6. Membrane filtration device: the pumped wastewater is passed through the TMF roll-type membrane filtration device to remove suspended solids and macromolecular substances to obtain membrane-filtered wastewater, and the pH value is adjusted. The pH value in the step S6 is 7.5. Then pump it into the biochemical pool;

S7. Biochemical tank: further remove ammonia nitrogen, total phosphorus, COD, and SS from the wastewater obtained in step S6 through biochemical treatment. The biochemical system can use a biological aerated filter or a membrane bioreactor.

In the above steps S2 and S6, sulfuric acid or sodium hydroxide is used to adjust the pH value of the waste water.

The addition amount of Fenton oxidation/ultraviolet in described step S4 is the 30% hydrogen peroxide that adds 200g ferrous sulfate and 2L per ton of waste water, and reaction time is 40 minutes; Adopt ultraviolet light irradiation, irradiation time is 50 minutes.

The anode in the electrolytic cell is an iron rod, the current is set to 150A, and the voltage is set to 15 volts.

Fillers are installed in the biochemical pool; the fillers are one or more of polyethylene suspension spherical fillers, soft fillers, semi-soft fillers, soft and semi-soft combined fillers, and three-dimensional elastic fillers.

Example 4

A method for treating ink wastewater produced by circuit boards, comprising the steps of:

S1. Raw water collection pool: firstly, import the raw water of circuit board production ink wastewater into the raw water collection pool for water quality balance, and then pump it into S2, reaction pool;

S2. Reaction tank: The wastewater after the water quality balance in the raw water collection tank is adjusted in the reaction tank to make the pH value of the wastewater 2.8. At the same time, add a coagulant to the reaction tank. The amount of the coagulant added is 6mg/ L; the coagulant is formed by mixing powdered activated carbon particles and active silicic acid in a mass ratio of 1:1, the fineness of the powdered activated carbon particles is 130-200 mesh, stirred and mixed to form a mud-water mixture of flocs ;

S3, filter press: use a pump to send the mud-water mixture in the reaction tank into the plate-and-frame filter press, perform solid-liquid separation on the mud-water mixture, transport the filter residue outside, and pump the filtrate into S4, Fenton oxidation/ultraviolet pool;

S4, Fenton oxidation/ultraviolet pool: add hydrogen peroxide and ferrous sulfate to the filtrate to perform Fenton reaction, and then send the wastewater after the oxidation reaction into the ultraviolet degradation reactor to degrade the wastewater by ultraviolet light, and the wastewater degraded by ultraviolet light Go directly to the next electrolysis process;

S5. Electrolytic cell: The electrolytic cell adopts a continuous high-frequency pulse electrolysis device, and the reaction time is 1.0 hour; adjust the pH value of the wastewater after the electrolytic treatment, and after the pH value of the wastewater reaches 10, continue to add powdery activated carbon particles, add the After powdered activated carbon particles, it can effectively prevent the subsequent membrane clogging in the membrane filtration device, the addition amount is 2mg/L, and it is sent into the membrane filtration device by a pump;

S6. Membrane filtration device: the pumped wastewater is passed through the TMF roll-type membrane filtration device to remove suspended solids and macromolecular substances to obtain membrane-filtered wastewater, and the pH value is adjusted. The pH value in the step S6 is 7.5. Then pump it into the biochemical pool;

S7. Biochemical tank: further remove ammonia nitrogen, total phosphorus, COD, and SS from the wastewater obtained in step S6 through biochemical treatment. The biochemical system can use a biological aerated filter or a membrane bioreactor.

In the above steps S2 and S6, sulfuric acid or sodium hydroxide is used to adjust the pH value of the waste water.

The addition amount of Fenton oxidation/ultraviolet in the described step S4 is the 30% hydrogen peroxide of 200g ferrous sulfate and 2L per ton of waste water, and the reaction time is 40 minutes; Adopt ultraviolet lamp irradiation, and irradiation time is 60 minutes.

The anode in the electrolytic cell is an iron rod, the current is set to 150A, and the voltage is set to 15 volts.

Fillers are installed in the biochemical pool; the fillers are one or more of polyethylene suspension spherical fillers, soft fillers, semi-soft fillers, soft and semi-soft combined fillers, and three-dimensional elastic fillers.

Example 5

A method for treating ink wastewater produced by circuit boards, comprising the steps of:

S1. Raw water collection pool: firstly, import the raw water of circuit board production ink wastewater into the raw water collection pool for water quality balance, and then pump it into S2, reaction pool;

S2. Reaction tank: The wastewater after the water quality balance in the raw water collection tank is adjusted in the reaction tank to make the pH value of the wastewater 2.7. At the same time, add a coagulant to the reaction tank. The amount of the coagulant added is 7mg/ L; the coagulant is powdered activated carbon particles, the fineness of the powdered activated carbon particles is 130-200 mesh, stirred and mixed to form a mud-water mixture of flocs;

S3, filter press: use a pump to send the mud-water mixture in the reaction tank into the plate-and-frame filter press, perform solid-liquid separation on the mud-water mixture, transport the filter residue outside, and pump the filtrate into S4, Fenton oxidation/ultraviolet pool;

S4, Fenton oxidation/ultraviolet pool: add hydrogen peroxide and ferrous sulfate to the filtrate to perform Fenton reaction, and then send the wastewater after the oxidation reaction into the ultraviolet degradation reactor to degrade the wastewater by ultraviolet light, and the wastewater degraded by ultraviolet light Go directly to the next electrolysis process;

S5. Electrolytic cell: The electrolytic cell adopts a continuous high-frequency pulse electrolysis device, and the reaction time is 0.8 hours; the pH value of the wastewater after the electrolytic treatment is adjusted, and after the pH value of the wastewater is 9.9, continue to add powdered activated carbon particles, add the After powdered activated carbon particles, it can effectively prevent the subsequent membrane clogging in the membrane filtration device, the addition amount is 1.5mg/L, and it is sent into the membrane filtration device by a pump;

S6. Membrane filtration device: the pumped wastewater is passed through the TMF roll-type membrane filtration device to remove suspended solids and macromolecular substances to obtain membrane-filtered wastewater, and the pH value is adjusted. The pH value in the step S6 is 7. Then pump it into the biochemical pool;

S7. Biochemical tank: further remove ammonia nitrogen, total phosphorus, COD, and SS from the wastewater obtained in step S6 through biochemical treatment. The biochemical system can use a biological aerated filter or a membrane bioreactor.

In the above steps S2 and S6, sulfuric acid or sodium hydroxide is used to adjust the pH value of the waste water.

The addition amount of Fenton oxidation/ultraviolet in described step S4 is the 30% hydrogen peroxide that adds 200g ferrous sulfate and 2L per ton of waste water, and reaction time is 30 minutes; Adopt ultraviolet light irradiation, irradiation time is 80 minutes.

The anode in the electrolytic cell is an iron rod, the current is set to 150A, and the voltage is set to 15 volts.

Fillers are installed in the biochemical pool; the fillers are one or more of polyethylene suspension spherical fillers, soft fillers, semi-soft fillers, soft and semi-soft combined fillers, and three-dimensional elastic fillers.

Example 6

A method for treating ink wastewater produced by circuit boards, comprising the steps of:

S1. Raw water collection pool: firstly, import the raw water of circuit board production ink wastewater into the raw water collection pool for water quality balance, and then pump it into S2, reaction pool;

S2. Reaction tank: The wastewater after the water quality balance in the raw water collection tank is adjusted in the reaction tank to make the pH value of the wastewater 2.8. At the same time, add a coagulant to the reaction tank. The amount of the coagulant added is 10mg/ L; the coagulant is powdered activated carbon particles, the fineness of the powdered activated carbon particles is 130-200 mesh, stirred and mixed to form a mud-water mixture of flocs;

S3, filter press: use a pump to send the mud-water mixture in the reaction tank into the plate-and-frame filter press, perform solid-liquid separation on the mud-water mixture, transport the filter residue outside, and pump the filtrate into S4, Fenton oxidation/ultraviolet pool;

S4, Fenton oxidation/ultraviolet pool: add hydrogen peroxide and ferrous sulfate to the filtrate to perform Fenton reaction, and then send the wastewater after the oxidation reaction into the ultraviolet degradation reactor to degrade the wastewater by ultraviolet light, and the wastewater degraded by ultraviolet light Go directly to the next electrolysis process;

S5. Electrolytic cell: The electrolytic cell adopts a continuous high-frequency pulse electrolysis device, and the reaction time is 0.5 hours; adjust the pH value of the wastewater after the electrolytic treatment, and after the pH value of the wastewater reaches 9.8, continue to add powdered activated carbon particles, add the After powdered activated carbon particles, it can effectively prevent the subsequent membrane clogging in the membrane filtration device, the addition amount is 1mg/L, and it is sent into the membrane filtration device by a pump;

S6. Membrane filtration device: the pumped wastewater is passed through the TMF roll-type membrane filtration device to remove suspended solids and macromolecular substances to obtain membrane-filtered wastewater, and the pH value is adjusted. The pH value in the step S6 is 7.5. Then pump it into the biochemical pool;

S7. Biochemical tank: further remove ammonia nitrogen, total phosphorus, COD, and SS from the wastewater obtained in step S6 through biochemical treatment. The biochemical system can use a biological aerated filter or a membrane bioreactor.

In the above steps S2 and S6, sulfuric acid or sodium hydroxide is used to adjust the pH value of the waste water.

In the step S4, the amount of Fenton oxidation/ultraviolet addition is to add 200g of ferrous sulfate and 2L of 30% hydrogen peroxide per ton of waste water, and the reaction time is 30 minutes; the ultraviolet lamp is used for irradiation, and the irradiation time is 60 minutes.

The anode in the electrolytic cell is an iron rod, the current is set to 150A, and the voltage is set to 15 volts.

Fillers are installed in the biochemical pool; the fillers are one or more of polyethylene suspension spherical fillers, soft fillers, semi-soft fillers, soft and semi-soft combined fillers, and three-dimensional elastic fillers.

Analyze the wastewater raw water parameters processed by Examples 1 to 6 and the treated effluent parameters and related test methods, specifically as follows:

1. The detection method of water quality parameters in the utility model is shown in Table 1

                                                

Table 1

2. The raw water parameter values of ink wastewater from circuit board production in Examples 1 to 6 are shown in Table 2 (the following parameters are all measured after water quality balance in the raw water collection pool):

Table 2

3. The treated water quality parameter values of Examples 1 to 6 are as shown in Table 3:

table 3

It can be seen from Table 3 that the treated wastewater has reached the first-level standard of the Guangdong Provincial Water Pollutant Discharge Limit (DB44/26-2001).

The above is only a preferred embodiment of the utility model, and does not limit the technical scope of the utility model in any way, so any minor modifications, equivalent changes and changes made to the above embodiments according to the technical essence of the utility model Modifications still belong to the scope of the technical solution of the utility model. the

Claims (7)

1. A circuit board production ink wastewater treatment system is characterized in that, comprising: The raw water collection pool used to import the raw water of the printed circuit board production ink wastewater into the raw water collection pool for water quality balance; A reaction tank for adjusting the pH value and coagulating to form a mud-water mixture; Filter press for solid-liquid separation of mud-water mixture; Fenton Oxidation/UV tank for oxidation reaction and UV degradation of the filtrate produced by the filter press; electrolytic cells for the electrolysis of waste water; Membrane filtration units for removal of suspended solids and macromolecules; and A biochemical pool used for domestic treatment of filtered water after membrane filtration to further remove ammonia nitrogen, total phosphorus, COD, and SS; The raw water outlet of the raw water collection tank is connected with the reaction tank water inlet of the reaction tank, the water outlet of the reaction tank is connected with the filter press liquid inlet of the filter press, and the filtrate outlet of the filter press is connected with the Fenton oxidation/ultraviolet The oxidation ultraviolet water inlet of the pool is connected, the oxidation ultraviolet water outlet of the Fenton oxidation/ultraviolet pool is connected with the electrolysis water inlet in the electrolytic cell, the electrolysis water outlet of the electrolytic cell is connected with the membrane filtration water inlet of the membrane filtration device, and the membrane filtration device The water outlet of the membrane filtrate is connected with the biochemical water inlet of the biochemical pool, and the concentrate outlet of the membrane filtration device is connected with the raw water collection pool. 2. A circuit board production ink wastewater treatment system according to claim 1, characterized in that: said membrane filtration device is a TMF tubular membrane filtration device. 3. A circuit board production ink wastewater treatment system according to claim 1, characterized in that: the anode in the electrolytic cell is an iron rod or an aluminum rod. 4. A circuit board production ink wastewater treatment system according to claim 1, characterized in that: the biochemical pool can be a biological reconciliation oxidation pool or aerated biological filter or membrane bioreactor. 5. A circuit board production ink wastewater treatment system according to claim 1, characterized in that: the filter press is a plate and frame filter press. 6. A circuit board production ink wastewater treatment system according to claim 1, characterized in that: the filter press is also provided with a mud discharge port. 7 . A circuit board production ink wastewater treatment system according to claim 1 , characterized in that: said Fenton oxidation/ultraviolet pool is provided with an ultraviolet photodegradation reactor.