CN111003880A - Printing and dyeing wastewater treatment system and method - Google Patents
Printing and dyeing wastewater treatment system and method Download PDFInfo
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- CN111003880A CN111003880A CN201911365509.5A CN201911365509A CN111003880A CN 111003880 A CN111003880 A CN 111003880A CN 201911365509 A CN201911365509 A CN 201911365509A CN 111003880 A CN111003880 A CN 111003880A
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- 238000004043 dyeing Methods 0.000 title claims abstract description 74
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 33
- 239000002351 wastewater Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000007885 magnetic separation Methods 0.000 claims abstract description 25
- 238000000926 separation method Methods 0.000 claims abstract description 22
- 239000007787 solid Substances 0.000 claims abstract description 8
- 238000005273 aeration Methods 0.000 claims description 28
- 230000007246 mechanism Effects 0.000 claims description 23
- 238000001223 reverse osmosis Methods 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 6
- 238000001728 nano-filtration Methods 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 abstract description 9
- 238000006731 degradation reaction Methods 0.000 abstract description 9
- 239000007809 chemical reaction catalyst Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000007800 oxidant agent Substances 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000000191 radiation effect Effects 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- 240000006108 Allium ampeloprasum Species 0.000 description 1
- 235000005254 Allium ampeloprasum Nutrition 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
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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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/302—Treatment of water, waste water, or sewage by irradiation with microwaves
-
- 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
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
Abstract
The invention provides a printing and dyeing wastewater treatment system, which comprises a microwave photoelectric Fenton treatment unit and a magnetic separation unit which are communicated in sequence through pipelines; the microwave photoelectric Fenton processing unit comprises a reaction container, a microwave generating device and an ultraviolet light generating device, wherein the reaction container is provided with a solid feeding hole, a positive electrode and a negative electrode, and the positive electrode and the negative electrode are electrically connected with a voltage output device; the magnetic separation unit comprises a separation container and an electromagnet, a water inlet of the magnetic separation unit is communicated with a water outlet pipeline of the microwave photoelectric Fenton processing unit, and the electromagnet is arranged inside the separation container. The printing and dyeing wastewater treatment system provided by the invention combines the microwave and the magnetic biochar photoelectric Fenton device to treat the printing and dyeing wastewater, has high degradation efficiency on organic matters in the printing and dyeing wastewater, can separate and recover the magnetic biochar serving as a photoelectric Fenton reaction catalyst after being dispersed in water, saves the cost of the magnetic biochar, and reduces the influence on subsequent treatment.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a printing and dyeing wastewater treatment system and method.
Background
The printing and dyeing wastewater has the characteristics of complex components, poor biodegradability, high chromaticity, strong toxicity, unstable pH and the like, belongs to wastewater which is difficult to treat, and has great harm to the environment.
According to the prior art, biochar is prepared and is used as an active agent of hydrogen peroxide in a heterogeneous photo-Fenton reaction to cooperate with ultrasonic waves to treat printing and dyeing wastewater, but the method has low degradation efficiency on pollutants in the printing and dyeing wastewater, and a large amount of hydrogen peroxide reagent needs to be additionally added in the reaction process, so that the treatment cost is increased.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a printing and dyeing wastewater treatment system and method.
In order to achieve the purpose, the invention adopts the technical scheme that: a printing and dyeing wastewater treatment system comprises a microwave photoelectric Fenton treatment unit and a magnetic separation unit which are sequentially communicated through pipelines;
the microwave photoelectric Fenton processing unit comprises a reaction container, a microwave generating device and an ultraviolet light generating device, wherein the reaction container is provided with a water inlet of the microwave photoelectric Fenton processing unit, a water outlet of the microwave photoelectric Fenton processing unit, a solid feed inlet, a positive electrode and a negative electrode, the positive electrode and the negative electrode are electrically connected with a voltage output device, the microwave generating device comprises a microwave output mechanism, the microwave output mechanism of the microwave generating device is arranged in the reaction container, the ultraviolet light generating device comprises an ultraviolet lamp, and the ultraviolet lamp of the ultraviolet light generating device is arranged in the reaction container;
the magnetic separation unit comprises a separation container and an electromagnet, the separation container is provided with a water inlet of the magnetic separation unit and a water outlet of the magnetic separation unit, the water inlet of the magnetic separation unit is communicated with a water outlet pipeline of the microwave photoelectric Fenton processing unit, and the electromagnet is arranged inside the separation container.
The printing and dyeing wastewater treatment system combines the microwave and the magnetic biochar photoelectric Fenton device to treat the printing and dyeing wastewater, so that the degradation efficiency of organic substances in the printing and dyeing wastewater is high, the microwave radiation effect of the printing and dyeing wastewater treatment system can promote high-speed rotation of oxidant molecules, the energy level is improved, the decomposition of the oxidant molecules is accelerated to generate more hydroxyl radicals, the activation effect is stronger, meanwhile, the heat effect of the microwave is more favorable for improving the reaction rate of the hydroxyl radicals, and the microwave and the magnetic biochar photoelectric Fenton device cooperate with each other to improve the degradation efficiency of the organic substances in the printing and dyeing wastewater; the printing and dyeing wastewater treatment system is also communicated with the magnetic separation unit, the electromagnet is arranged in the magnetic separation unit, the separation of wastewater and magnetic biochar is realized, the magnetic biochar serving as a photoelectric Fenton reaction catalyst can be separated and recovered again after being dispersed in water, the cost of the magnetic biochar is saved, and the influence on subsequent treatment is reduced.
Preferably, the printing and dyeing wastewater treatment system further comprises a nanofiltration-reverse osmosis unit, and a nanofiltration membrane and a reverse osmosis membrane are arranged in the nanofiltration-reverse osmosis unit.
After the printing and dyeing wastewater treatment system is combined with the nanofiltration-reverse osmosis unit, the treatment efficiency of the printing and dyeing wastewater is further improved.
Preferably, the microwave photoelectric fenton treatment unit further comprises an aeration device, wherein the aeration device comprises an aeration disc, the aeration disc is arranged inside the reaction container, the aeration disc is arranged below an ultraviolet lamp of the ultraviolet light generation device, and the aeration disc is arranged below a microwave output mechanism of the microwave generation device.
The printing and dyeing wastewater treatment system is combined with the aeration device, and under the condition that the voltage is input to the positive electrode and the negative electrode, the gas input into the water by the aeration device can generate hydrogen peroxide, so that the use of medicaments can be reduced, the generation rate of hydroxyl radicals is further improved, and the degradation efficiency of organic matters in the printing and dyeing wastewater is improved.
Preferably, the microwave generating device comprises 3-8 microwave output mechanisms, the ultraviolet light generating device comprises 3-8 ultraviolet lamps, the 3-8 microwave output mechanisms are arranged from top to bottom, the 3-8 ultraviolet lamps are arranged from top to bottom, and the ultraviolet lamps and the microwave output mechanisms are alternately arranged at intervals from top to bottom.
According to the printing and dyeing wastewater treatment system, the microwave output mechanism of the microwave generation device and the ultraviolet lamp of the ultraviolet light generation device are set at specific positions, so that better synergistic effect can be realized through microwave and Fenton reaction, the degradation efficiency of organic matters in the printing and dyeing wastewater is improved, and the treatment effect in the printing and dyeing wastewater is improved.
Preferably, 3-10 plate-shaped electromagnets are vertically arranged in the separation container at intervals, and the 3-10 plate-shaped electromagnets are parallel to each other.
Preferably, the magnetic separation unit further comprises a material collection hopper, and the material collection hopper is arranged below the electromagnet.
The printing and dyeing wastewater treatment system can enable the magnetic biochar material adsorbed on the electromagnet to fall into the collecting hopper to be recovered after the electromagnet is powered off by arranging the collecting hopper.
Preferably, the printing and dyeing wastewater treatment system further comprises a magnetic charcoal feeding hopper, and a discharge hole of the magnetic charcoal feeding hopper is arranged above the solid feed hole of the microwave photoelectric Fenton treatment unit.
The invention provides a printing and dyeing wastewater treatment method, which applies any one of the printing and dyeing wastewater treatment systems and comprises the following steps:
(1) adding magnetic biochar into a reaction container of the microwave photoelectric Fenton processing unit, and starting a microwave generating device and an ultraviolet light generating device of the microwave photoelectric Fenton processing unit;
(2) inputting the printing and dyeing wastewater to be treated into a reaction container of the microwave photoelectric Fenton treatment unit, and simultaneously starting an electromagnetic separation system.
Preferably, in the step (1), the microwave generating device and the ultraviolet light generating device of the microwave photo-Fenton treatment unit are started, and meanwhile, aeration is carried out in the reaction container of the microwave photo-Fenton treatment unit;
the irradiation intensity of an ultraviolet lamp of the ultraviolet light generating device is 1mW/cm2～6mW/cm2The microwave output mechanism of the microwave generating device outputs microwave with power as follows: 400-700W.
Preferably, the weight ratio of the magnetic biochar to the printing and dyeing wastewater to be treated is 1: (200-300), the flow rate of aeration is 0.1-0.4m3/h。
The printing and dyeing wastewater treatment method has good treatment effect on the printing and dyeing wastewater, and the treated printing and dyeing wastewater has low organic content and high decolorization rate.
The invention has the beneficial effects that: the printing and dyeing wastewater treatment system is combined with a microwave and magnetic biochar photoelectric Fenton device to treat printing and dyeing wastewater, the degradation efficiency of organic matters in the printing and dyeing wastewater is high, the microwave radiation effect of the printing and dyeing wastewater treatment system can promote high-speed rotation of oxidant molecules, the energy level is improved, the decomposition of the oxidant molecules is accelerated to generate more hydroxyl radicals, the system has a stronger activation effect, meanwhile, the heat effect of the microwave is more beneficial to the improvement of the reaction rate of the hydroxyl radicals, and the microwave and the magnetic biochar photoelectric Fenton cooperate with each other to improve the degradation efficiency of organic matters in the printing and dyeing wastewater; the printing and dyeing wastewater treatment system is also communicated with the magnetic separation unit, the electromagnet is arranged in the magnetic separation unit, the separation of wastewater and magnetic biochar is realized, the magnetic biochar serving as a photoelectric Fenton reaction catalyst can be separated and recovered again after being dispersed in water, the cost of the magnetic biochar is saved, and the influence on subsequent treatment is reduced.
Drawings
FIG. 1 is a schematic view of a printing and dyeing wastewater treatment system according to an embodiment of the present invention.
The device comprises a microwave photoelectric Fenton processing unit 1, a microwave photoelectric Fenton processing unit 101, a reaction container 102, an ultraviolet light generating device 103, a microwave output mechanism of the microwave generating device 104, an aeration disc 105, a magnetic biochar feeding hopper 106, an ultraviolet light generating device, a magnetic separation unit 2, an electromagnet 201, an electromagnet 202, a collecting hopper 203, a separation container 3 and a nanofiltration-reverse osmosis unit.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
As an embodiment of the present invention, a printing and dyeing wastewater treatment system, as shown in fig. 1, includes a microwave photoelectric fenton treatment unit 1, a magnetic separation unit 2, and a nanofiltration-reverse osmosis unit 3, which are sequentially connected by pipelines;
the microwave photoelectric Fenton treatment unit 1 comprises a reaction vessel 101, a microwave generating device, an ultraviolet light generating device 102 and an aerating device, wherein the reaction vessel is provided with a water inlet of the microwave photoelectric Fenton treatment unit, the device comprises a water outlet, a solid feeding hole, a positive electrode and a negative electrode of a microwave photoelectric Fenton processing unit, wherein the positive electrode and the negative electrode are electrically connected with a voltage output device, the microwave generation device comprises a microwave output mechanism 103, the microwave output mechanism 103 of the microwave generation device is arranged in a reaction container 101, an ultraviolet light generation device 102 comprises an ultraviolet lamp 106, the ultraviolet lamp 106 of the ultraviolet light generation device is arranged in the reaction container 101, the aeration device comprises an aeration disc 104, the aeration disc 104 is arranged in the reaction container 101, the aeration disc 104 is arranged below the ultraviolet lamp 106 of the ultraviolet light generation device, and the aeration disc is arranged below the microwave output mechanism 103 of the microwave generation device;
the magnetic separation unit 2 comprises a separation container 203, an electromagnet 201 and a material collecting hopper 202, the separation container 203 is provided with a water inlet of the magnetic separation unit and a water outlet of the magnetic separation unit, the water inlet of the magnetic separation unit 2 is communicated with a water outlet pipeline of the microwave photoelectric Fenton processing unit 1, the electromagnet 201 is arranged inside the separation container 203, and the material collecting hopper 202 is arranged below the electromagnet 201.
A nanofiltration membrane and a reverse osmosis membrane are arranged in the nanofiltration-reverse osmosis unit 3.
For better improving the synergistic effect of microwave and light fenton reaction and improving the degradation effect of organic matters in the printing and dyeing wastewater, the microwave generating device comprises 3-8 microwave output mechanisms, the ultraviolet generating device comprises 3-8 ultraviolet lamps, the 3-8 microwave output mechanisms are arranged from top to bottom, the 3-8 ultraviolet lamps are arranged from top to bottom, and the ultraviolet lamps and the microwave output mechanisms are alternately arranged from top to bottom at intervals.
In order to better improve the separation effect of the magnetic biochar, 3-10 plate-shaped electromagnets are vertically arranged in the separation container at intervals, and the 3-10 plate-shaped electromagnets are parallel to each other.
In order to conveniently add magnetic biochar printing and dyeing wastewater treatment system into a reaction container of the microwave photoelectric Fenton treatment unit, the system also comprises a magnetic biochar feeding hopper 105, and a discharge hole of the magnetic biochar feeding hopper is arranged above a solid feed hole of the microwave photoelectric Fenton treatment unit.
The printing and dyeing wastewater treatment method using the printing and dyeing wastewater treatment system of the embodiment comprises the following steps:
(1) adding magnetic biochar into a reaction container of the microwave photoelectric Fenton treatment unit, and starting a microwave generating device, an ultraviolet light generating device and an aeration device of the microwave photoelectric Fenton treatment unit;
(2) inputting printing and dyeing wastewater to be treated into a reaction container of the microwave photoelectric Fenton treatment unit, and starting an electromagnetic separation system;
wherein the irradiation intensity of an ultraviolet lamp of the ultraviolet light generating device is 6mW/cm2The power of the microwave output by the microwave output mechanism of the microwave generating device is 700W;
the weight ratio of the magnetic biochar to the printing and dyeing wastewater to be treated is 1: (200-300) and the flow rate of aeration is 0.1-0.4m3/h。
The magnetic biochar used in this example was prepared using the following method:
(1) heating the biomass of 20-40 meshes to 500 ℃ at a heating speed of 20 ℃/min, and carrying out pyrolysis for 1h to obtain biochar, wherein the biomass is any one or more of wood powder, bamboo powder, straw powder, wheat straw powder and leek powder;
(2) mixing a magnetic material and biochar in a weight ratio of 1-3: 1 in a 5mol/L sodium hydroxide solution, adjusting the pH of the solution to 9-10, stirring for 1h, standing for 2h, adjusting the pH to 7, performing solid-liquid separation, collecting solids, and drying at 60 ℃ for 30min to obtain the magnetic biochar, wherein the magnetic material is a mixture of ferric trichloride and any one of magnesium chloride, zinc chloride and copper chloride.
Comparative example 1
As a printing and dyeing wastewater treatment system of comparative example 1 of the present invention, the only differences of the printing and dyeing wastewater treatment system of the present comparative example from example 1 are: the printing and dyeing wastewater treatment system of comparative example 1 did not include a microwave generation device.
Comparative example 2
As a printing and dyeing wastewater treatment system of comparative example 2 of the present invention, the only differences of the printing and dyeing wastewater treatment system of the present comparative example from example 1 are: the printing and dyeing wastewater treatment system of comparative example 2 did not include an aeration device.
Effect example 1
The printing and dyeing wastewater treatment systems of example 1 and comparative examples 1-2 were used to treat printing and dyeing wastewater, the water inlet of the printing and dyeing wastewater treatment system was used to monitor the COD value and the chromaticity of the inlet water, and the purification efficiency of the printing and dyeing wastewater treatment system on the printing and dyeing wastewater was examined by monitoring the COD value and the chromaticity of the outlet water at the water outlet of the printing and dyeing wastewater treatment system.
The results are shown in table 1:
TABLE 1 Effect of treating printing and dyeing wastewater by the printing and dyeing wastewater treatment systems of example 1 and comparative examples 1 to 2
By comparing the effects of treating printing wastewater in the printing wastewater treatment systems of example 1 and comparative examples 1 to 2, it was found that the treatment effects on COD and chromaticity were greatly improved by the examples provided with the microwave device and the aeration device, and the results of Table 1 also show that the microwave device and the aeration device provided in the photoelectricity Fenton treatment unit exert a synergistic effect.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A printing and dyeing wastewater treatment system is characterized by comprising a microwave photoelectric Fenton treatment unit and a magnetic separation unit which are communicated with each other by pipelines in sequence;
the microwave photoelectric Fenton processing unit comprises a reaction container, a microwave generating device and an ultraviolet light generating device, wherein the reaction container is provided with a water inlet of the microwave photoelectric Fenton processing unit, a water outlet of the microwave photoelectric Fenton processing unit, a solid feed inlet, a positive electrode and a negative electrode, the positive electrode and the negative electrode are electrically connected with a voltage output device, the microwave generating device comprises a microwave output mechanism, the microwave output mechanism of the microwave generating device is arranged in the reaction container, the ultraviolet light generating device comprises an ultraviolet lamp, and the ultraviolet lamp of the ultraviolet light generating device is arranged in the reaction container;
the magnetic separation unit comprises a separation container and an electromagnet, the separation container is provided with a water inlet of the magnetic separation unit and a water outlet of the magnetic separation unit, the water inlet of the magnetic separation unit is communicated with a water outlet pipeline of the microwave photoelectric Fenton processing unit, and the electromagnet is arranged inside the separation container.
2. The printing and dyeing wastewater treatment system according to claim 1, further comprising a nanofiltration-reverse osmosis unit, wherein a nanofiltration membrane and a reverse osmosis membrane are arranged in the nanofiltration-reverse osmosis unit.
3. The printing and dyeing wastewater treatment system according to claim 1, wherein the microwave photoelectric Fenton treatment unit further comprises an aeration device, the aeration device comprises an aeration disc, the aeration disc is arranged inside the reaction container, the aeration disc is arranged below an ultraviolet lamp of the ultraviolet light generation device, and the aeration disc is arranged below a microwave output mechanism of the microwave generation device.
4. The printing and dyeing wastewater treatment system according to claim 1, wherein the microwave generation device comprises 3-8 microwave output mechanisms, the ultraviolet light generation device comprises 3-8 ultraviolet lamps, the 3-8 microwave output mechanisms are arranged from top to bottom, the 3-8 ultraviolet lamps are arranged from top to bottom, and the ultraviolet lamps and the microwave output mechanisms are alternately arranged from top to bottom.
5. The printing and dyeing wastewater treatment system according to claim 1, characterized in that 3-10 plate-shaped electromagnets are vertically arranged in the separation container at intervals, and the 3-10 plate-shaped electromagnets are parallel to each other.
6. The printing and dyeing wastewater treatment system according to claim 1, wherein the magnetic separation unit further comprises a collection hopper, and the collection hopper is arranged below the electromagnet.
7. The printing and dyeing wastewater treatment system according to claim 1, further comprising a magnetic biochar hopper, wherein a discharge hole of the magnetic biochar hopper is arranged above a solid feed hole of the microwave photoelectric Fenton treatment unit.
8. A printing and dyeing wastewater treatment method using the printing and dyeing wastewater treatment system according to any one of claims 1 to 7, comprising the steps of:
(1) adding magnetic biochar into a reaction container of the microwave photoelectric Fenton processing unit, and starting a microwave generating device and an ultraviolet light generating device of the microwave photoelectric Fenton processing unit;
(2) inputting the printing and dyeing wastewater to be treated into a reaction container of the microwave photoelectric Fenton treatment unit, and simultaneously starting an electromagnetic separation system.
9. The method according to claim 8, wherein in the step (1), the microwave generating device and the ultraviolet light generating device of the microwave photo-Fenton treatment unit are started and simultaneously aerated into the reaction vessel of the microwave photo-Fenton treatment unit;
the irradiation intensity of an ultraviolet lamp of the ultraviolet light generating device is 1mW/cm2-6mW/cm2；
The microwave output mechanism of the microwave generating device outputs microwave with the power as follows: 400- & lt700 & gtW.
10. The method of claim 9, wherein the magnetic biochar isThe weight ratio of the printing and dyeing wastewater to be treated is 1: (200-300), wherein the flow rate of aeration is 0.1-0.4m3/h。
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| CN201911365509.5A CN111003880A (en) | 2019-12-25 | 2019-12-25 | Printing and dyeing wastewater treatment system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111646615A (en) * | 2020-06-15 | 2020-09-11 | 北京环球中科水务科技有限公司 | Skid-mounted photo-Fenton water treatment equipment |
| CN114100851A (en) * | 2020-08-27 | 2022-03-01 | 宝山钢铁股份有限公司 | Magnetic impurity processing system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114100851A (en) * | 2020-08-27 | 2022-03-01 | 宝山钢铁股份有限公司 | Magnetic impurity processing system |
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