CN110845059A - Sewage treatment device based on electrochemistry - Google Patents
Sewage treatment device based on electrochemistry Download PDFInfo
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- CN110845059A CN110845059A CN201911276441.3A CN201911276441A CN110845059A CN 110845059 A CN110845059 A CN 110845059A CN 201911276441 A CN201911276441 A CN 201911276441A CN 110845059 A CN110845059 A CN 110845059A
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- 239000010865 sewage Substances 0.000 title claims abstract description 178
- 230000005518 electrochemistry Effects 0.000 title claims description 10
- 150000002500 ions Chemical class 0.000 claims abstract description 40
- 230000001699 photocatalysis Effects 0.000 claims abstract description 29
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 28
- 238000004062 sedimentation Methods 0.000 claims abstract description 20
- 238000005273 aeration Methods 0.000 claims abstract description 18
- 238000007146 photocatalysis Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 90
- 239000012530 fluid Substances 0.000 claims description 30
- 239000000758 substrate Substances 0.000 claims description 22
- 239000002585 base Substances 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 12
- 238000004065 wastewater treatment Methods 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 9
- 239000011941 photocatalyst Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000003513 alkali Substances 0.000 claims description 8
- 229910021389 graphene Inorganic materials 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 8
- 239000003921 oil Substances 0.000 claims description 8
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 230000000593 degrading effect Effects 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 4
- 238000005188 flotation Methods 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 11
- 239000002351 wastewater Substances 0.000 description 7
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- 229910052751 metal Inorganic materials 0.000 description 5
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
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- 238000005086 pumping Methods 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
Abstract
The invention discloses an electrochemical-based sewage treatment device, which comprises a first filter tank, a first pH value adjusting tank, a photocatalytic sewage treatment unit, a first sedimentation tank, a second pH value adjusting tank, an electrochemical sewage treatment unit, an aeration tank, an air floatation tank, a second sedimentation tank and a second filter tank, wherein suspended matters in sewage are precipitated and filtered. The invention utilizes the photocatalysis sewage treatment unit to degrade organic matters, utilizes the electrochemical sewage treatment unit to recover heavy metal ions in sewage, and simultaneously can utilize the electrochemical sewage treatment unit to degrade and eliminate the organic matters which are not treated in the sewage, thereby reducing the treatment pressure of a subsequent aeration tank and an air floatation tank.
Description
Technical Field
The invention relates to the technical field of sewage treatment. In particular to a sewage treatment device based on electrochemistry.
Background
With the development of socioeconomic and the improvement of the living standard of people, more and more wastewater is generated by manufacturing enterprises, and the wastewater cannot be directly discharged, especially the wastewater generated by metal processing and manufacturing industries. Wastewater from metal processing manufacturing industry contains a large amount of heavy metal ions, which will not cause serious pollution to the natural environment and will cause serious harm to human and animals if discharged directly, for example, the water anode in japan water anode bay in 1956 is an embodiment of water anode having a large amount of methyl mercury. The wastewater generated in the production process of many metal processing enterprises contains not only heavy metal ions, but also a large amount of organic matters, and the heavy metal ions and the organic matters in the wastewater need to be treated by the wastewater treatment, so that the treated wastewater can be directly recycled or directly discharged. The capacity of the existing sewage treatment equipment generally can be heavier in one direction, for example, the content of organic matters in the sewage is reduced, the content of heavy metal ions in the sewage is reduced, and for the sewage with higher organic matters and heavy metal ions, two devices are usually mixed, so that the cost of the sewage treatment equipment of an enterprise is increased sharply, and the cost of sewage treatment is increased.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide an electrochemical-based sewage treatment device, which utilizes a photocatalytic sewage treatment unit to degrade organic matters, utilizes an electrochemical sewage treatment unit to recover heavy metal ions in sewage, and simultaneously can also utilize the electrochemical sewage treatment unit to degrade and eliminate untreated organic matters in sewage, thereby reducing the treatment pressure of a subsequent aeration tank and an air floatation tank.
In order to solve the technical problems, the invention provides the following technical scheme:
an electrochemical-based wastewater treatment plant comprising:
the first filter is used for filtering sundries with larger volume in the sewage;
the first pH value adjusting tank is used for adjusting the pH value of the sewage;
the photocatalytic sewage treatment unit is used for decomposing and degrading organic matters in sewage;
the first sedimentation tank is used for precipitating and filtering suspended matters in the sewage;
the second pH value adjusting tank is used for adjusting the pH value of the sewage treated by the photocatalysis sewage;
the electrochemical sewage treatment unit is used for treating heavy metal ions in the sewage;
the aeration tank is used for treating residual organic matters and heavy metal ions in the sewage;
the air floatation tank is used for treating solid granules in the sewage;
the second sedimentation tank is used for precipitating and filtering suspended matters in the treated sewage;
the second filter is used for filtering sundries which are not subjected to sedimentation treatment in the treated sewage;
the water outlet end of the sewage pump is in fluid conduction connection with the water inlet end of the first filter tank, the water outlet end of the first filter tank is in fluid conduction connection with the water inlet end of the first pH value adjusting tank, the water outlet end of the first pH value adjusting tank is in fluid conduction connection with the water inlet end of the photocatalytic sewage treatment unit, the water outlet end of the photocatalytic sewage treatment unit is in fluid conduction connection with the water inlet end of the first sedimentation tank, the water outlet end of the first sedimentation tank is in fluid conduction connection with the water inlet end of the second pH value adjusting tank, the water outlet end of the second pH value adjusting tank is in fluid conduction connection with the water inlet end of the electrochemical sewage treatment unit, the water outlet end of the electrochemical sewage treatment unit is in fluid conduction connection with the water inlet end of the aeration tank and the water inlet end of the photocatalytic sewage treatment unit respectively, the water outlet end of the aeration tank is in fluid conduction connection with the water inlet end of the air flotation tank, and the water outlet end of the air, the water outlet end of the second sedimentation tank is in fluid conduction connection with the water inlet end of the second filter tank, and the water outlet end of the second filter tank is in fluid conduction connection with the water inlet end of the clear water discharge pipe; and the water inlet end and the water outlet end of the electrochemical sewage treatment unit are respectively provided with an ion sensor for measuring the concentration of heavy metal ions in sewage, and the ion sensors are in communication connection with the console.
In the electrochemical-based sewage treatment device, the anode for electrochemical sewage treatment used by the electrochemical sewage treatment unit comprises an outer layer of a filter screen for an anode, an electrode substrate for the anode and a conductive wire binding post for the anode; the outer layer of the anode filter screen is sleeved on the anode electrode substrate, and a gap is formed between the inner wall of the outer layer of the anode filter screen and the outer wall of the anode electrode substrate; the aperture of the filter hole on the outer layer of the filter screen for the anode is 2-5 mm; the conductive wire binding post for the anode is arranged on the electrode substrate for the anode and is electrically connected with the positive electrode of the power supply.
Above-mentioned sewage treatment plant based on electrochemistry, the electrode substrate for the positive pole includes post core, conductive tube and conductive splint, conductive splint one side with conductive tube outer wall fixed connection just follow on the conductive tube outer wall conductive tube circumference is equipped with more than or equal to 2 conductive splint, the conductive tube cover be in on the post core and with post core zonulae occludens, the post core passes through the conductor wire terminal for the positive pole is connected with the anodal electricity of power.
In the sewage treatment device based on electrochemistry, the conductive clamping plate is a plate made of spiral conductive material; bonding has the magnetite strip on the electrically conductive splint lateral wall adjacent two on the same lateral wall of electrically conductive splint be equipped with the clearance between the magnetite strip, adsorb iron fillings on the magnetite strip.
In the electrochemical-based sewage treatment device, the cathode for electrochemical sewage treatment used by the electrochemical sewage treatment unit comprises a conductive binding post for a cathode, a filter screen outer layer for the cathode and an electrode substrate for the cathode; the outer layer of the filter screen for the cathode is sleeved on the electrode substrate for the cathode, and a gap is formed between the inner wall of the outer layer of the filter screen for the cathode and the outer wall of the electrode substrate for the cathode; the aperture of the filter hole on the outer layer of the filter screen for the cathode is 2-5 mm; the conductive wire binding post for the cathode is installed on the electrode substrate for the cathode and is electrically connected with the negative electrode of the power supply.
Above-mentioned sewage treatment plant based on electrochemistry, on the exposed outer wall of conducting tube on the exposed outer wall of electrically conductive splint with the three iron oxide strips are kept away from all be equipped with graphite alkene layer on the side of electrically conductive splint, be located the three iron oxide strips are kept away from on the side of electrically conductive splint graphite alkene layer with be located graphite alkene layer and/or be located on the exposed outer wall of conducting tube graphite alkene layer electrically conductive connection on the exposed outer wall of electrically conductive splint.
Above-mentioned sewage treatment plant based on electrochemistry, the second pH value equalizing basin is intake to hold and is equipped with control cabinet communication connection's ion sensor.
According to the electrochemical-based sewage treatment device, the photocatalytic component used by the photocatalytic sewage treatment unit comprises the acid-resistant, alkali-resistant and oil-resistant carrier and the photocatalyst particles, and the photocatalyst particles are distributed on the acid-resistant, alkali-resistant and oil-resistant carrier.
In the sewage treatment device based on electrochemistry, the acid, alkali and oil resistant carrier is a polytetrafluoroethylene film.
According to the electrochemical-based sewage treatment device, the photocatalyst particles consist of the following components: 20-50 parts of titanium dioxide, 1-5 parts of zinc oxide and 0.1-0.3 part of platinum.
The technical scheme of the invention achieves the following beneficial technical effects:
1. the invention utilizes the photocatalysis sewage treatment unit and the electrochemistry sewage treatment unit to treat organic matters and heavy metal ions in sewage, can effectively remove the organic matters and the heavy metal ions in the sewage, reduces the treatment pressure of an aeration tank and an air floatation tank in the subsequent treatment of the sewage, and simultaneously utilizes two treatment units to treat the sewage, compared with the integration of a sewage treatment system for treating the organic matters in the sewage with a heavy weight and a sewage treatment system for treating the heavy metal ions in the sewage with a heavy weight, the invention not only can reduce a part of sewage treatment links, but also can save the equipment purchase cost.
2. The outer layer of the filter screen is sleeved on the electrode, so that floccules can be prevented from being attached to the surface of the electrode, the influence of suspended matters in water on the electrode is reduced, and the treatment capacity of the electrochemical sewage treatment unit is favorably ensured.
3. The anode is provided with the ferroferric oxide strip, steel slag can be adsorbed on the anode when the anode is sacrificed and heavy metals are recovered by utilizing the characteristic that the ferroferric oxide has magnetism, so that the trouble of fixing the steel slag is reduced, steel slag particles can be directly added on the cathode when the steel slag is reduced, and other fixing means are not needed.
Drawings
FIG. 1 is a schematic flow diagram of an electrochemical-based wastewater treatment plant according to the present invention;
FIG. 2 is a schematic view showing the construction of a cathode for electrochemical sewage treatment of the electrochemical-based sewage treatment apparatus according to the present invention;
FIG. 3 is a schematic view showing the construction of an anode for electrochemical sewage treatment of the electrochemical-based sewage treatment apparatus according to the present invention;
FIG. 4 is a schematic view showing the structure of an electrode substrate for an anode of an electrochemical-based sewage treatment apparatus according to the present invention;
FIG. 5 is a schematic perspective view of the conductive tube and the conductive clamp plate in the electrode substrate for the anode of the electrochemical-based wastewater treatment apparatus according to the present invention.
The reference numbers in the figures denote: 1-outer layer of filter screen for cathode; 2-an electrode base for a cathode; 3-conductive wire binding post for cathode; 4-outer layer of filter screen for anode; 5-an electrode base for anode; 6-conductive wire binding post for anode; 7-column core; 8-a conductive tube; 9-a conductive splint; 10-ferric oxide strip; 11-iron filings.
Detailed Description
As shown in fig. 1, the electrochemical-based sewage treatment apparatus of the present invention, the device comprises a first filter tank for filtering impurities with large volume in sewage, a first pH value adjusting tank for adjusting the pH value of the sewage, a photocatalytic sewage treatment unit for decomposing and degrading organic matters in the sewage, a first sedimentation tank for depositing and filtering suspended matters in the sewage, a second pH value adjusting tank for adjusting the pH value of the sewage subjected to photocatalytic sewage treatment, an electrochemical sewage treatment unit for treating heavy metal ions in the sewage, an aeration tank for treating residual organic matters and heavy metal ions in the sewage, an air floatation tank for treating solid granules in the sewage, a second sedimentation tank for depositing and filtering the suspended matters in the treated sewage and a second filter tank for filtering the impurities which are not deposited and treated in the treated sewage; the water outlet end of the sewage pump is in fluid conduction connection with the water inlet end of the first filter tank, the water outlet end of the first filter tank is in fluid conduction connection with the water inlet end of the first pH value adjusting tank, the water outlet end of the first pH value adjusting tank is in fluid conduction connection with the water inlet end of the photocatalytic sewage treatment unit, the water outlet end of the photocatalytic sewage treatment unit is in fluid conduction connection with the water inlet end of the first sedimentation tank, the water outlet end of the first sedimentation tank is in fluid conduction connection with the water inlet end of the second pH value adjusting tank, the water outlet end of the second pH value adjusting tank is in fluid conduction connection with the water inlet end of the electrochemical sewage treatment unit, the water outlet end of the electrochemical sewage treatment unit is in fluid conduction connection with the water inlet end of the aeration tank and the water inlet end of the photocatalytic sewage treatment unit respectively, the water outlet end of the aeration tank is in fluid conduction connection with the water inlet end of the air flotation tank, and the water outlet end of the air, the water outlet end of the second sedimentation tank is in fluid conduction connection with the water inlet end of the second filter tank, and the water outlet end of the second filter tank is in fluid conduction connection with the water inlet end of the clear water discharge pipe; the electrochemical sewage treatment unit is provided with an ion sensor which is used for measuring the concentration of heavy metal ions in sewage and is in communication connection with the console on the water inlet end and the water outlet end respectively, and the second pH value adjusting tank is provided with an ion sensor which is in communication connection with the console on the water inlet end. The ion sensors positioned on the water inlet end and the water outlet end of the electrochemical sewage treatment unit monitor the concentration change of heavy metal ions in the sewage flowing in and out of the electrochemical sewage treatment unit, and the change of the concentration of the heavy metal ions in the sewage flowing in and out of the electrochemical sewage treatment unit is known in time through the control console so as to adjust the voltage loaded at two ends of the anode and the cathode in the electrochemical sewage treatment unit and the current density between the anode and the cathode. And the ion sensor arranged on the water inlet end of the second pH value adjusting tank and the ion sensor arranged on the water inlet end of the electrochemical sewage treatment unit are used for monitoring the change of the concentration of heavy metal ions in the sewage after the second pH value adjustment so as to provide data reference for adjusting the medicine used for the second pH value adjustment.
Wherein, as shown in fig. 3-5, the anode for electrochemical sewage treatment used by the electrochemical sewage treatment unit comprises a filter screen outer layer 4 for anode, an electrode base body 5 for anode and a conductive wire binding post 6 for anode; the anode filter screen outer layer 4 is sleeved on the anode electrode substrate 5, and a gap is formed between the inner wall of the anode filter screen outer layer 4 and the outer wall of the anode electrode substrate 5; the aperture of the filter hole of the outer layer 4 of the filter screen for the anode is 3 mm; the conductive wire binding post 6 for the anode is arranged on the electrode substrate 5 for the anode and is electrically connected with the positive electrode of the power supply; the anode electrode substrate 5 comprises a column core 7, a conductive tube 8 and conductive clamping plates 9, one side of each conductive clamping plate 9 is fixedly connected with the outer wall of the conductive tube 8, 10 conductive clamping plates 9 are arranged on the outer wall of the conductive tube 8 along the circumferential direction of the conductive tube 8, the conductive tube 8 is sleeved on the column core 7 and is tightly connected with the column core 7, and the column core 7 is electrically connected with a power supply anode through the anode conductive wire binding post 6; the conductive clamping plate 9 is made of a spiral conductive material; iron oxide strips 10 are bonded on the side wall of the conductive clamping plate 9, a gap is formed between every two adjacent iron oxide strips 10 on the same side wall of the conductive clamping plate 9, and scrap iron 11 is adsorbed on the iron oxide strips 10; graphene layers are arranged on the exposed outer wall of the conductive tube 8, the exposed outer wall of the conductive clamping plate 9 and the side face, away from the conductive clamping plate 9, of the three-iron tetroxide strip 10, and the graphene layers on the side face, away from the conductive clamping plate 9, of the three-iron tetroxide strip 10 are respectively in conductive connection with the graphene layers on the exposed outer wall of the conductive tube 8 and the graphene layers on the exposed outer wall of the conductive clamping plate 9; as shown in fig. 2, the cathode for electrochemical sewage treatment used in the electrochemical sewage treatment unit includes a conductive binding post for cathode, a screen outer layer 1 for cathode, and an electrode base body 2 for cathode; the cathode filter screen outer layer 1 is sleeved on the cathode electrode substrate 2, and a gap is formed between the inner wall of the cathode filter screen outer layer 1 and the outer wall of the cathode electrode substrate 2; the aperture of the filter hole of the outer layer 1 of the filter screen for the cathode is 3 mm; the cathode conductive wire terminal 3 is mounted on the cathode electrode base 2 and electrically connected to a negative power supply.
In order to avoid the situation that the anode electrode base body 5 or/and the cathode electrode base body 2 are damaged to cause the shutdown of the device, in this embodiment, four anode electrode base bodies 5 are arranged in the anode filter screen outer layer 4, four cathode electrode base bodies 2 are arranged in the cathode filter screen outer layer 1, so that the shutdown of the device caused by the failure of any one of the anode electrode base bodies 5 or four cathode electrode base bodies 2 is not afraid of.
In this embodiment, the photocatalytic component used by the photocatalytic sewage treatment unit includes an acid-resistant, alkali-resistant, and oil-resistant carrier and photocatalyst particles, the photocatalyst particles are distributed on the acid-resistant, alkali-resistant, and oil-resistant carrier, the acid-resistant, alkali-resistant, and oil-resistant carrier is a polytetrafluoroethylene film, and the photocatalyst particles are composed of the following components: 35 parts by weight of titanium dioxide, 4 parts by weight of zinc oxide and 0.25 part by weight of platinum.
According to the invention, the photocatalytic sewage treatment unit is used for degrading organic matters in sewage to degrade the organic matters into carbon dioxide and water or organic matters with smaller molecules, and then the electrochemical sewage treatment unit is used for carrying out oxidative degradation on the untreated organic matters or the organic matters degraded into smaller molecules, so that the organic matters in sewage can be removed to the maximum extent, meanwhile, the sewage can be removed to a great extent without staying in the photocatalytic sewage treatment unit for a long time, the sewage treatment speed is relatively improved, and the treatment pressure of the aeration tank and the air floatation tank can be reduced. And the electrochemical sewage treatment unit is used for removing heavy metal ions contained in the sewage, and the aeration tank is used for effectively supplementing the heavy metal ions removed by the electrochemical sewage treatment unit, so that the heavy metal ions in the sewage can be removed to a greater extent.
The electrochemical-based sewage treatment device is utilized to treat the to-be-treated sewage containing emulsified oil which is produced in the production of certain metal product processing enterprises, and the sewage before treatment and the reuse water obtained after treatment are handed over to a third-party detection mechanism for detection.
The sewage to be treated is detected by a third party detection mechanism, the COD content in the sewage to be treated is 11600mg/L, the pH value is 5.5-6.2, the Cu content is 16.72mg/L, and the chromium content is 25.36 mg/L.
Pumping sewage into the first filter tank by a sewage pump, filtering metal fragments with larger particle sizes in the sewage, then enabling the sewage to flow into the first pH value adjusting tank, automatically adding medicine by an automatic medicine adding device to adjust the pH value of the sewage to 6.5-7.3, enabling the sewage to flow into the photocatalytic sewage treatment unit to carry out photocatalytic degradation on organic matters in the sewage, then discharging the treated sewage into the first settling tank to settle suspended matters and particles in the sewage, discharging the settled sewage into the second pH value adjusting tank to adjust the pH value of the sewage, adjusting the pH value of the sewage in the second pH value adjusting tank to 7.0-7.5, discharging the sewage with the pH value adjusted to 7.0-7.5 into the electrochemical sewage treatment unit to be treated, and degrading heavy metal ions and residual organic matters in the sewage by using the electrochemical sewage treatment unit, then the treated sewage is treated by the aeration tank, the air floatation tank, the second sedimentation tank and the second filter tank respectively. Wherein the illumination intensity of the photocatalytic sewage treatment unit is 184mW/cm2The current density in the electrochemical sewage treatment unit is 7.6mA/cm2. When the concentration of the heavy metal ions detected by the ion sensor at the water outlet end of the electrochemical sewage treatment unit is less than or equal to the sewage discharge standard, the aeration of the aeration tank and the blowing of air or oxygen into the air flotation tank can be stopped.
And detecting the treated reuse water by a third-party detection mechanism, wherein the COD content, the pH value, the Cu content and the chromium content in the treated reuse water are respectively 62mg/L, 7.1-7.2, 0.008mg/L and 0.01 mg/L.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.
Claims (10)
1. Sewage treatment plant based on electrochemistry, its characterized in that includes:
the first filter is used for filtering sundries with larger volume in the sewage;
the first pH value adjusting tank is used for adjusting the pH value of the sewage;
the photocatalytic sewage treatment unit is used for decomposing and degrading organic matters in sewage;
the first sedimentation tank is used for precipitating and filtering suspended matters in the sewage;
the second pH value adjusting tank is used for adjusting the pH value of the sewage treated by the photocatalysis sewage;
the electrochemical sewage treatment unit is used for treating heavy metal ions in the sewage;
the aeration tank is used for treating residual organic matters and heavy metal ions in the sewage;
the air floatation tank is used for treating solid granules in the sewage;
the second sedimentation tank is used for precipitating and filtering suspended matters in the treated sewage;
the second filter is used for filtering sundries which are not subjected to sedimentation treatment in the treated sewage;
the water outlet end of the sewage pump is in fluid conduction connection with the water inlet end of the first filter tank, the water outlet end of the first filter tank is in fluid conduction connection with the water inlet end of the first pH value adjusting tank, the water outlet end of the first pH value adjusting tank is in fluid conduction connection with the water inlet end of the photocatalytic sewage treatment unit, the water outlet end of the photocatalytic sewage treatment unit is in fluid conduction connection with the water inlet end of the first sedimentation tank, the water outlet end of the first sedimentation tank is in fluid conduction connection with the water inlet end of the second pH value adjusting tank, the water outlet end of the second pH value adjusting tank is in fluid conduction connection with the water inlet end of the electrochemical sewage treatment unit, the water outlet end of the electrochemical sewage treatment unit is in fluid conduction connection with the water inlet end of the aeration tank and the water inlet end of the photocatalytic sewage treatment unit respectively, the water outlet end of the aeration tank is in fluid conduction connection with the water inlet end of the air flotation tank, and the water outlet end of the air, the water outlet end of the second sedimentation tank is in fluid conduction connection with the water inlet end of the second filter tank, and the water outlet end of the second filter tank is in fluid conduction connection with the water inlet end of the clear water discharge pipe; and the water inlet end and the water outlet end of the electrochemical sewage treatment unit are respectively provided with an ion sensor for measuring the concentration of heavy metal ions in sewage, and the ion sensors are in communication connection with the console.
2. The electrochemical-based wastewater treatment apparatus according to claim 1, wherein the anode for electrochemical wastewater treatment used in the electrochemical wastewater treatment unit comprises a mesh outer layer (4) for anode, an electrode base body (5) for anode, and a conductive wire binding post (6) for anode; the anode filter screen outer layer (4) is sleeved on the anode electrode substrate (5), and a gap is formed between the inner wall of the anode filter screen outer layer (4) and the outer wall of the anode electrode substrate (5); the aperture of the filter hole of the outer layer (4) of the filter screen for the anode is 2-5 mm; the conductive wire binding post (6) for the anode is arranged on the electrode base body (5) for the anode and is electrically connected with the positive electrode of the power supply.
3. The electrochemical-based sewage treatment device according to claim 2, wherein the anode electrode substrate (5) comprises a column core (7), a conductive tube (8) and a conductive clamping plate (9), one side of the conductive clamping plate (9) is fixedly connected with the outer wall of the conductive tube (8), 2 or more conductive clamping plates (9) are arranged on the outer wall of the conductive tube (8) along the circumferential direction of the conductive tube (8), the conductive tube (8) is sleeved on the column core (7) and tightly connected with the column core (7), and the column core (7) is electrically connected with a power supply anode through the anode conductive wire binding post (6).
4. Electrochemical-based sewage treatment plant according to claim 3, characterized in that said electrically conductive clamping plate (9) is a plate of a helical electrically conductive material; electrically conductive splint (9) are last to bond has magnetite strip (10) electrically conductive splint (9) are with adjacent two on the same lateral wall be equipped with the clearance between magnetite strip (10), adsorb iron fillings (11) on magnetite strip (10).
5. The electrochemical-based wastewater treatment apparatus according to claim 4, wherein the cathode for electrochemical wastewater treatment used in the electrochemical wastewater treatment unit comprises a conductive binding post for cathode, a screen outer layer (1) for cathode, and an electrode base body (2) for cathode; the cathode filter screen outer layer (1) is sleeved on the cathode electrode substrate (2) and a gap is formed between the inner wall of the cathode filter screen outer layer (1) and the outer wall of the cathode electrode substrate (2); the aperture of the filter hole of the outer layer (1) of the filter screen for the cathode is 2-5 mm; the conductive wire binding post (3) for the cathode is arranged on the electrode base body (2) for the cathode and is electrically connected with the negative electrode of the power supply.
6. The electrochemical-based sewage treatment plant according to claim 5, wherein graphene layers are disposed on the exposed outer wall of the conductive pipe (8), the exposed outer wall of the conductive clamping plate (9) and the side of the tri-iron tetroxide strip (10) away from the conductive clamping plate (9), and the graphene layers on the side of the tri-iron tetroxide strip (10) away from the conductive clamping plate (9) are in conductive connection with the graphene layers on the exposed outer wall of the conductive pipe (8) and/or the graphene layers on the exposed outer wall of the conductive clamping plate (9).
7. The electrochemical-based sewage treatment plant of any one of claims 1 to 6 wherein the second pH adjusting tank is provided with an ion sensor at the water inlet end thereof, said ion sensor being in communication with the console.
8. The electrochemical-based sewage treatment device according to any one of claims 1 to 6, wherein the photocatalytic component used in the photocatalytic sewage treatment unit comprises an acid-resistant, alkali-resistant and oil-resistant carrier and photocatalyst particles, and the photocatalyst particles are distributed on the acid-resistant, alkali-resistant and oil-resistant carrier.
9. The electrochemical-based wastewater treatment plant of claim 8, wherein the acid, base, and oil resistant support is a polytetrafluoroethylene membrane.
10. The electrochemical-based wastewater treatment apparatus of claim 9, wherein the photocatalyst particles are composed of: 20-50 parts of titanium dioxide, 1-5 parts of zinc oxide and 0.1-0.3 part of platinum.
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