Device and method for removing organic matters in strong acidic system by automatic fine filtration and electro-oxidation

Abstract

The present application relates to automatic fine filtration, electric oxidation removal of strong acid system organic device and method. The device is sequentially connected by pipeline first bag filter, aeration stirring barrel, second bag filter, transfer barrel, automatic fine filter, filtrate barrel, electric oxidation equipment, cooling water storage bucket. The method comprises: (1) pretreatment: the waste acid is pumped into the first bag filter, and the large particle suspended solids and part of the oil stain in the waste acid are removed by filtration; (2) automatic fine filtration: the filtrate of step (1) is pumped into the aeration stirring barrel, and after adding organic matter remover, aeration stirring is carried out, then pumped into the second bag filter, the filtrate enters the transfer barrel, and finally the automatic fine filter is opened to filter, and the visible suspended solids and residual oil stain are removed in depth; (3) electric oxidation: the organic matter in step (2) is removed by using electric oxidation equipment, and the acid after removing organic matter is obtained; (4) aeration cooling: the waste acid after electric oxidation in step (3) is pumped into the cooling water storage barrel, and the temperature of the waste acid is reduced by aeration.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wastewater treatment, and particularly relates to a device and method for removing organic matters in a strong acid system through automatic fine filtration and electro-oxidation. BACKGROUND

[0002] Waste phosphoric acid and waste sulfuric acid generated in the process of surface treatment of oxidized aluminum, waste nitric acid generated in the process of tin stripping and copper stripping, and chromium-containing washing water generated in the process of roughening chromium and electroplating chromium all belong to strong acid and strong oxidizing systems, and all contain organic matters. Most of the organic matters will pollute resins and membranes, and surfactant-type organic matters will also cause severe evaporation bubbling, so that evaporation cannot be carried out or condensed water exceeds the standard. Most of the organic matters are stubborn, and it is difficult to separate them from the strong acid and strong oxidizing system through conventional methods, which increases the difficulty of separation of subsequent acid and metal impurities. Some acids cannot be separated through existing methods because the organic matters cannot be removed.

[0003] At present, there is no effective method for removing organic matters from a strong acid and strong oxidizing system. SUMMARY

[0004] The present application aims to overcome the deficiencies of the prior art and provide a device and method for removing organic matters in a strong acid and strong oxidizing system through automatic fine filtration and electro-oxidation.

[0005] The technical solution of the present application is that the device for removing organic matters in a strong acid system through automatic fine filtration and electro-oxidation comprises a first bag filter, an aeration stirring barrel, a second bag filter, a transfer barrel, an automatic fine filtration machine, a filtrate barrel, an electro-oxidation equipment, and a cooling water storage barrel, which are sequentially connected by pipelines.

[0006] Preferably, the filter cloth of the first bag filter has a particle size of 10-40 microns, the filter cloth of the second bag filter has a particle size of 200-301 microns, the concentrated liquid of the transfer barrel is directly discharged into a wastewater station, the circulating liquid of the automatic fine filtration machine returns to the transfer barrel, and the circulating liquid inlet of the transfer barrel is located at any position 20 cm above the liquid outlet.

[0007] Preferably, the electro-oxidation equipment comprises a cylinder, an electrode module, a flow meter, a thermometer, and a liquid level meter; the cylinder has upper and lower elliptical heads; the anode sheets and cathode sheets of the electrode module are arranged in an interlaced manner; the contact part of the electrode module and the wire is arranged outside the cylinder, and the electrode part penetrates through the cylinder wall and is arranged inside the cylinder, and the contact part of the cylinder wall is fixed and sealed by Teflon material.

[0008] Preferably, the cylinder is made of carbon steel lined with Teflon or a glass cylinder, and has a thickness of 8-14 mm; the electrode sheets of the electrode module are each composed of a support and a vertical electrode sheet fixed on the support at equal intervals; the total effective area of the anode sheets of each electrode module is 0.4-0.8 m2; the distance between the anode sheets and the cathode sheets is 0.5-1.5 cm; the distance between the electrode module and the cylinder wall is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the cylinder wall is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 0.5-1.5 cm; the distance between the electrode module and the wire is 02 The distance between the anode and the cathode is 2-5mm, and the relationship between the effective area of the anode and the effective volume of the cylinder is 0.5-2m 2 The anode area.

[0009] As preferred: the cooling water storage barrel is round bottomed and coverless, the diameter and height of the cylinder are the same as the size of the cylinder of the electro-oxidation equipment, the cylinder is made of carbon steel lined with Teflon or glass jar, and the aeration pipe is arranged in the cylinder.

[0010] Another technical solution of the present application is the method for removing strong acidic system organic matters by automatic fine filtration and electro-oxidation, which is characterized by comprising the following steps:

[0011] (1) pretreatment: pumping the waste acid into the first bag filter to remove the large particle suspensions and part of the oil stains in the waste acid;

[0012] (2) automatic fine filtration: pumping the filtrate in step (1) into the aeration and stirring barrel, adding the organic matter removing agent, and then pumping into the second bag filter, so that the filtrate enters the transfer barrel, and finally the automatic fine filter is opened to remove the visible suspensions and residual oil stains;

[0013] (3) electro-oxidation: removing the organic matters in step (2) by using the electro-oxidation equipment to obtain the acid after removing the organic matters;

[0014] (4) aeration cooling: pumping the waste acid after electro-oxidation in step (3) into the cooling water storage barrel to reduce the temperature of the waste acid by aeration.

[0015] As preferred: the waste acid in step (1) is nitric acid, sulfuric acid, mixed acid of chromic anhydride and sulfuric acid, hydrochloric acid and phosphoric acid, and the acid concentration is 5%-40%; the pore size of the filter cloth in the first bag filter is 10-40 microns; the pretreatment further comprises:

[0016] (1.1) pumping the waste acid into the first bag filter for filtration, and the flow rate is 1000-1200L / h;

[0017] (1.2) when the flow rate is reduced to 200-300L / h, stop the filtration, first close the feed valve, and then close the discharge valve;

[0018] (1.3) taking out the filter bag, cleaning it and then reinstalling it, continuing the filtration until the liquid level in the first bag filter accounts for 4 / 5 of the height of the barrel, and then stopping the filtration.

[0019] As preferred: the organic matter removing agent in step 2 is insoluble in the solid particles of the acid, and is any one of chitosan derivatives, activated carbon, resins, and gel-type adsorbents with a particle size of less than 45 microns; the automatic fine filter has a filtering accuracy of 40-500 nm, and is made of any one of PP and PVC, and the gasket is made of any one of rubber, PP, PVC, synthetic resin, and polytetrafluoroethylene; the automatic fine filter further comprises:

[0020] (2.1) Aerated adsorption of organic matter: the filtrate in the first bag filter in step 1 is pumped into the aerated stirring barrel, and 1-3 kg / m 3 of the organic matter removing agent is added and stirred for 0.5-3 h;

[0021] (2.2) Removal of large-particle suspended matter: after the aeration and stirring, the waste acid is pumped into the second bag filter with a filter cloth aperture of 60-80 mesh for filtration, and the filtrate is transferred into the transfer tank until the liquid level in the transfer tank accounts for 4 / 5 of the tank height, and the filtration is stopped;

[0022] (2.3) Preparation before operation: the automatic fine filter switch is turned on, the backwashing time is set to 5 s every 15 min, and the produced water is returned to the transfer tank, and the fine filtration system is started;

[0023] (2.4) Equipment commissioning: after the system runs for 5-10 min, the produced water is observed through the produced water flowmeter part, if the produced water is clear and no suspended matter is visible with the naked eye, or no precipitate is found at the bottom of the transparent bottle after the produced water is placed for 0.5 h, the produced water switch is switched to the filtrate tank storage;

[0024] (2.5) System operation: the equipment is normally operated with a circulating water flow of 10-15 m 3 / h, and the average produced water amount of each membrane is between 80-150 L / h, and when the average produced water amount of each membrane is less than 50 L / h, the water inlet is stopped;

[0025] (2.6) Cleaning of the automatic fine filter: the residual waste acid in the membrane is discharged through the membrane bottom switch, and the membrane is sequentially cleaned with pure water, cleaning agent, and pure water, wherein the pure water after cleaning is directly discharged into the waste water station, and the cleaning agent is returned to the original tank for repeated use;

[0026] As preferred: the anode of the electro-oxidation equipment in step 3 is any one of titanium-based composite electrodes, diamond composite electrodes, graphite composite electrodes, and manganese-based composite electrodes; and the removal of organic matter further comprises:

[0027] (3.1) Preparation for starting: the filtrate of the automatic fine filter is pumped into the electro-oxidation tank, and the electro-oxidation equipment is turned on, and the electro-oxidation is performed under a constant current condition with a current density of 70 mA / cm 2 ;

[0028] (3.2) Operation: Electro-oxidation to COD < 200-1000 mg / L, stop operation, discharge;

[0029] (3.3) Aeration cooling: After the electro-oxidation, the liquid is discharged to the cooling storage bucket and cooled to room temperature by aeration.

[0030] As preferred: the aeration mode of the cooling storage bucket in step (7) is aeration through an aeration pipe, and the temperature is cooled to < 40℃.

[0031] Compared with the prior art, the beneficial effects of the present application are:

[0032] (1) The present application is suitable for the treatment of any strong acid system, the organic matter removal rate is controllable, the acid after treatment can be reused by existing methods, and the equipment runs stably;

[0033] (2) The equipment material of the present application has good corrosion resistance and is suitable for strong acid and strong oxidizing system. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a structural diagram of the in-situ reuse device of chromic acid of the present application;

[0035] Figure 2 is a structural diagram of the anode and cathode of the electrode module of the present application. DETAILED DESCRIPTION

[0036] The present application will be further described in detail below with reference to the accompanying drawings:

[0037] Please refer to Figure 1 , the device for removing organic matter in strong acid system by automatic fine filtration and electro-oxidation is composed of a first bag filter, an aeration stirring barrel, a second bag filter, a transfer barrel, an automatic fine filter, a filtrate barrel, an electro-oxidation equipment and a cooling storage bucket connected in sequence by pipelines.

[0038] The filter cloth particle size of the first bag filter is 40 μm, the filter cloth particle size of the second bag filter is 200 μm, the concentrated liquid of the transfer barrel is directly discharged into the wastewater station, the circulating liquid of the automatic fine filter returns to the transfer barrel, and the circulating liquid inlet of the transfer barrel is above the opposite side of the discharge port.

[0039] Please refer to Figure 1 , Figure 2 , the electro-oxidation equipment includes a cylinder, an electrode module, a flow meter, a thermometer and a liquid level meter; the cylinder has upper and lower elliptical heads, the material is carbon steel lined with iron fluoride, and the thickness of the cylinder is 12 mm; the electrode module is composed of seven anodes and eight cathodes arranged alternately, and the electrode pieces of the electrode module are each composed of a support and a polar piece vertically and equidistantly fixed on the support; the total effective area of the anode pieces of each module is 0.8 m 2, the distance between the anode and the cathode is 3mm, the relationship between the effective area of the anode and the effective volume of the cylinder is that 0.6m 2 The electrode module and the wire contact part are placed outside the cylinder, the electrode part is placed inside the cylinder through the cylinder wall, and the contact part with the cylinder wall is fixed and sealed with Teflon material.

[0040] The cooling water storage bucket is a round bottom without cover, the diameter and height of the cylinder are the same as the size of the electro-oxidation equipment cylinder, the cylinder material is carbon steel lined with Teflon, and an aeration pipe is arranged inside.

[0041] Please refer to Figure 1 The method for removing strong acid system organic matter by automatic fine filtration and electro-oxidation is shown in the figure, and the treatment object is aluminum parts waste acid:

[0042] Pretreatment: pump the waste acid with phosphorus content of 89g / kg, aluminum content of 20g / kg and COD of 2000mg / L into the first bag filter with particle size of 40 microns, filter and remove large particles suspended solids and part of oil stains in the waste acid;

[0043] Automatic fine filtration: pump the filtrate of step (1) into the aeration stirring barrel, add carbon powder and stir for 2h, then pump into the second bag filter with particle size of 200 microns, the filtrate enters the transfer tank, and finally open the automatic fine filter to filter, and deeply remove visible suspended solids and residual oil stains;

[0044] Electro-oxidation: use electro-oxidation equipment to remove organic matter in step (2) to obtain acid after removing organic matter.

[0045] Aeration cooling: pump the waste acid after electro-oxidation in step (3) into the cooling water storage bucket, and reduce the temperature of the waste acid by aeration.

[0046] Pump the waste acid with phosphorus content of 89g / kg, aluminum content of 20g / kg and COD of 2000mg / L into the bag filter with particle size of 40 microns, filter, the flow rate is 1000-1200L / h, the filtrate flows into the transfer tank; when the flow rate decreases to 200-300L / h, stop filtering, first close the feed valve, then close the discharge valve; take out the filter bag, clean it and reinstall it, continue filtering until the liquid level in the aeration stirring barrel is 4 / 5 of the barrel height, stop filtering.

[0047] Pump the filtrate into the aeration stirring barrel, add 3kg / m 3The carbon powder is subjected to aeration stirring for 2 hours, and then pumped into a second cloth bag filter with a pore size of 60-80 mesh for filtration. The filtrate is introduced into a transfer tank until the liquid level reaches 4 / 5 of the tank height, and the filtration is stopped. The switch of the automatic precision filter is opened, and the backwashing time is set to 5 seconds every 15 minutes. The produced water is returned to the transfer tank, and the precision filtration system is started to run. After 5-10 minutes of system running, the water production is observed through the water production flowmeter. If the produced water is clear and free of visible suspended solids, the water production switch is switched to the water storage tank. The normal running cycle water flow of the equipment is 10-15 m 3 / h, and the average water production of each membrane is 80-150 L / h. When the average water production of each membrane is less than 50 L / h, the water inlet is stopped. The residual waste acid in the membrane is discharged through the membrane bottom switch, and then the membrane is cleaned with pure water, cleaning agent and pure water in sequence. The pure water after cleaning is directly discharged into the waste water station, and the cleaning agent is returned to the original tank for repeated use.

[0048] The filtrate of the automatic precision filtration is pumped into the electro-oxidation tank, and the equipment is opened. The electro-oxidation is carried out under the condition of a constant current with a current density of 70 mA / cm 2 . When the COD is less than 200-1000 mg / L, the running is stopped, and the material is discharged.

[0049] The material liquid after electro-oxidation is discharged into a cooling water storage tank, and then cooled to room temperature by aeration.

[0050] The above only describes the preferred embodiments of the present application. Any equivalent changes and modifications made within the scope of the claims of the present application shall be covered by the claims of the present application.

Claims

1. An apparatus for automatically removing organic matter from a strongly acidic system through fine filtration and electro-oxidation, characterized in that, It consists of a first bag filter, an aeration and mixing tank, a second bag filter, a transfer tank, an automatic fine filter, a filtrate tank, an electro-oxidation device, and a cooling water storage tank, connected in sequence by pipes. The filter cloth of the first bag filter has a particle size of 10-40μm, and the filter cloth of the second bag filter has a particle size of 200-301μm; the concentrate in the transfer tank is directly discharged into the wastewater station, and the circulating liquid of the automatic fine filter is returned to the transfer tank. The feed inlet of the circulating liquid in the transfer tank is located at any position more than 20cm above the liquid outlet. The electro-oxidation equipment includes a cylinder, an electrode module, a flow meter, a thermometer, and a level gauge. The cylinder has upper and lower elliptical heads. The anode and cathode plates of the electrode module are arranged alternately. The part of the electrode module that contacts the wire is placed outside the cylinder, and the electrode part passes through the cylinder wall and is placed inside the cylinder. The part that contacts the cylinder wall is fixed and sealed with Teflon material. The cooling water storage tank has a round bottom and no lid. The diameter and height of the cylinder are the same as the cylinder size of the electro-oxidation equipment. The cylinder material is carbon steel lined with Teflon or a glass tank, and an aeration pipe is installed inside.

2. The apparatus for automatically removing organic matter from strongly acidic systems by fine filtration and electro-oxidation according to claim 1, characterized in that, The cylinder is made of carbon steel lined with Teflon or glass, with a thickness of 8–14 mm. The electrode modules consist of supporting members and vertically fixed electrode plates at equal intervals on the supporting members. The total effective area of ​​the anode plates in each electrode module is 0.4–0.8 m². 2 The distance between the anode and cathode is 2–5 mm, and the effective area of ​​the anode is related to the effective volume of the cylinder by 0.5–2 m³ per cubic meter of water sample. 2 Anode area.

3. A method for automatically removing organic matter from a strongly acidic system through fine filtration and electro-oxidation, characterized in that, Includes the following steps: (1) Pretreatment: The waste acid is pumped into the first bag filter to filter out large particulate suspended matter and some oil stains in the waste acid; the waste acid mentioned in step (1) is a mixture of nitric acid, sulfuric acid, chromic anhydride sulfuric acid, hydrochloric acid and phosphoric acid, with an acid concentration of 5% to 40%; the filter cloth pore size in the first bag filter is 10 to 40 micrometers. (2) Automatic Fine Filtration: The filtrate from step (1) is pumped into an aeration and mixing tank, an organic matter removal agent is added, and then aeration and mixing are performed. The filtrate is then pumped into a second bag filter, and the filtrate enters a transfer tank. Finally, the automatic fine filter is turned on to remove visible suspended solids and residual oil. The organic matter removal agent mentioned in step (2) is an acid-insoluble solid particle, and is any one of chitosan derivatives, activated carbon, resins, or gel adsorbents with a particle size <45 micrometers. The filtration accuracy of the automatic fine filter is 40–500 nm, the main equipment material is any one of PP or PVC, and the gasket is any one of rubber or synthetic resin. (3) Electro-oxidation: The organic matter in step (2) is removed by an electro-oxidation device to obtain acid after the organic matter is removed; the anode of the electro-oxidation device in step (3) is any one of titanium-based composite electrode, diamond composite electrode, graphite composite electrode and manganese-based composite electrode; (4) Aeration and cooling: Pump the waste acid after electro-oxidation in step (3) into a cooling water tank and reduce the temperature of the waste acid by aeration.

4. The method for automatically removing organic matter from a strongly acidic system by fine filtration and electro-oxidation according to claim 3, characterized in that, The preprocessing further includes: (1.1) Pump the waste acid into the first bag filter for filtration at a flow rate of 1000-1200 L / h; (1.2) When the flow rate drops to 200-300 L / h, stop filtration, close the feed valve first, and then close the discharge valve. (1.3) Remove the filter bag, clean it, reinstall it, and continue filtering until the liquid level in the first bag filter is 4 / 5 of the height of the tank, then stop filtering.

5. The method for automatically removing organic matter from a strongly acidic system by fine filtration and electro-oxidation according to claim 3, characterized in that, The automatic fine filtration further includes: (2.1) Aeration and adsorption of organic matter: Pump the filtrate from the first bag filter in step (1) into the aeration mixing tank at a rate of 1-3 kg / m³. 3 Add an organic matter remover and aerate and stir for 0.5–3 hours; (2.2) Removal of large suspended solids: After aeration and stirring, the waste acid is pumped into a second bag filter with a filter cloth pore size of 60-80 mesh for filtration. The filtrate enters the transfer tank until the liquid level in the transfer tank occupies 4 / 5 of the tank height, at which point filtration is stopped. (2.3) Preparation before operation: Turn on the automatic fine filter switch, set the backwash time to backwash for 5 seconds every 15 minutes, the permeate water is still returned to the transfer tank, and the fine filter system is started. (2.4) Equipment trial operation: After the system runs for 5 to 10 minutes, observe the water production through the water production flow meter. If the water production is clear and there are no visible suspended solids, or if there is no sediment at the bottom of the transparent bottle after the water production has been left to stand for 0.5 hours, switch the water production switch to the filter tank for storage. (2.5) System Operation: The normal operating flow rate of the equipment is 10-15 m³ / h. 3 / h, the average water production of each membrane is between 80 and 150 L / h. When the average water production of each membrane is <50 L / h, water feeding is stopped; (2.6) Cleaning the automatic fine filter: drain the residual waste acid in the membrane through the switch at the bottom of the membrane, and clean it with pure water, cleaning agent and pure water in sequence. The pure water is discharged directly into the wastewater station after cleaning, and the cleaning agent is returned to the original tank for repeated use.

6. The method for automatically removing organic matter from a strongly acidic system by fine filtration and electro-oxidation according to claim 3, characterized in that, The electro-oxidation further includes: (3.1) Start-up preparation: Pump the filtrate from the automatic fine filtration into the electro-oxidation tank, turn on the electro-oxidation equipment, and set the current density to 70 mA / cm². 2 Electro-oxidation is performed under constant current conditions; (3.2) Operation: Electro-oxidation until COD < 200-1000 mg / L, then stop operation and discharge the material; (3.3) Aeration and cooling: After the electro-oxidized liquid is discharged into the cooling water tank, it is cooled to room temperature by aeration.

7. The method for automatically removing organic matter from a strongly acidic system by fine filtration and electro-oxidation according to claim 3, characterized in that, The aeration method of the cooling water storage tank in step (4) is to aerate through aeration pipes and cool it to a temperature of <40℃.

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