CN119100531B

CN119100531B - A superoxide photocatalytic oxidation tail vegetable wastewater treatment device and treatment method

Info

Publication number: CN119100531B
Application number: CN202411191553.XA
Authority: CN
Inventors: 李梦田; 许海生; 齐宏丽; 孙娅楠; 杨晓露
Original assignee: Yunnan Zhide Environmental Protection Technology Co ltd
Current assignee: Yunnan Zhide Environmental Protection Technology Co ltd
Priority date: 2024-08-28
Filing date: 2024-08-28
Publication date: 2025-03-25
Anticipated expiration: 2044-08-28
Also published as: CN119100531A

Abstract

The present invention discloses a superoxide photocatalytic oxidation wastewater treatment device and a treatment method, which relates to the technical field of sewage treatment, and includes the following steps: S1: inputting wastewater into an ME micro-electrolysis reactor, adding acid for stirring reaction, and then performing intermittent aeration, and the wastewater contacts the filler inside the ME micro-electrolysis reactor under the action of airflow to generate a micro-electrolysis reaction; S2: inputting the wastewater after the micro-electrolysis reaction into a sedimentation tank, and adding alkali for stirring reaction. The present invention uses micro-electrolysis to decolorize, break chains and rings, destroy molecular structures, and turn difficult to degrade into easy to degrade, superoxide photocatalytic oxidation for oxidative decolorization, removes odors, and oxidizes macromolecules into small molecules at the same time, and the ecological composite bed finally converts small molecules and nitrogen and phosphorus into carbon dioxide, water, nitrogen and other inorganic substances, which plays an important role in developing the vegetable industry, solving the environmental pollution problems caused by industrial development, and realizing the recycling of freshwater resources.

Description

Device and method for treating waste water of tail vegetables through super-oxygen photocatalytic oxidation

Technical Field

The invention relates to the technical field of waste water treatment of tail vegetables, in particular to a device and a method for treating waste water by super-oxygen photocatalytic oxidation.

Background

One of the problems facing the world today is the disposal of various types of waste and energy crisis. With the rapid development of the crop industry, the generation of agricultural waste is also increasing. Because vegetables have high water content, are easy to rot and are not easy to store, a large amount of waste is generated in the process of harvesting and selling, and the vegetables are called as 'tail vegetables'. The vegetable waste treatment mode mainly comprises crushing direct discharge, landfill, incineration, composting, feed conversion and anaerobic fermentation. The solid content of the vegetable waste is 10%, the moisture content is up to more than 90%, and the vegetable waste is high in organic component content, so that a large amount of percolate can be generated when the vegetable waste is stacked or buried, and serious environmental pollution is caused.

At present, tail water generated by tail vegetable treatment only can reach the water quality standard of sewer discharged into towns, however, a vegetable waste disposal site is generally far away from towns, long discharge pipelines are required to be laid for carrying out nano-tubes, meanwhile, a large amount of irrigation water is required for vegetable planting around the vegetable waste disposal site, surface water or underground water is required to be extracted for irrigation, so that water resources are greatly wasted, and land occupation and investment increase are required for laying the pipelines.

After biochemical treatment, cellulose, lignin, anthocyanin, long-chain fatty compounds and a small amount of alkaloids which are extremely difficult to degrade by microorganisms exist in the waste water. Lignin is a high molecular polymer with complex and tough structure, and is difficult to decompose by microorganisms. Anthocyanin is a water-soluble pigment, and is present in the tail water of the tail vegetable, so that the tail water is not easy to be metabolized and utilized by microorganisms, and the tail water is brown yellow. Long chain fatty compounds are more difficult to thoroughly break down by microorganisms. These substances have high COD and total salt content in the effluent, are brown yellow, have poor biodegradability, and cannot be used for agricultural irrigation resource utilization without advanced treatment.

Therefore, the recycling of tail water after the treatment of the tail vegetables, the environmental pollution problem caused by industrial development, and the realization of the recycling of fresh water resources are the problems to be solved urgently.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a device and a method for treating waste water of a superoxygen photocatalytic oxidation tail vegetable, which are used for recycling tail water, reducing the problem of environmental pollution and realizing the recycling of fresh water resources.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

A method for treating waste water of a superoxygenated photo-catalytic oxidation tail vegetable comprises the following steps:

S1, inputting wastewater into an ME micro-electrolysis reactor, adding acid for stirring reaction, and then performing intermittent aeration, wherein the wastewater contacts with a filler in the ME micro-electrolysis reactor under the action of airflow to perform micro-electrolysis reaction;

s2, inputting the wastewater subjected to the micro-electrolysis reaction into a sedimentation tank, adding alkali for stirring reaction, and then performing mud-water separation;

S3, inputting the supernatant fluid subjected to mud-water separation into a super-oxygen photocatalytic oxidation reactor, and carrying out step-by-step reaction by sequentially connecting the super-oxygen photocatalytic oxidation reactors in series, wherein pollutants in the wastewater are subjected to super-oxygen generation under the action of ultraviolet light and a catalyst to generate hydroxyl free radical oxidative decomposition organic matters and chromophoric groups;

s4, inputting the wastewater treated by the super-oxygen photocatalytic oxidation reactor into an ecological composite bed, and carrying out a step-by-step reaction by the ecological composite beds which are sequentially connected in series.

Further, in S1, the ME micro-electrolysis reactor uses iron and carbon to form micro-primary cells for the electrolytic treatment of wastewater.

Further, in S3, inputting the superoxygen into a superoxygen photocatalytic oxidation reactor, enabling the wastewater to contact the superoxygen, then intercepting particles in the wastewater through a water distribution sieve, finally enabling the wastewater to contact the superoxygen on the surface of a catalyst, enabling the catalyst to adsorb pollutants in the wastewater, intercepting the pollutants, providing a reaction medium for the reaction, and accelerating the reaction speed of the pollutants and the superoxygen.

Further, when sewage is contacted with the superoxide on the surface of the catalyst, the superoxide is decomposed to generate hydroxyl free radicals through the synergistic effect of ultraviolet light, so that the oxidation reaction mainly comprising direct reaction of the superoxide and organic matters in the water is converted into the oxidation reaction mainly comprising direct reaction of the free radicals and the organic matters.

In the step S3, the wastewater treated by the super-oxygen photocatalytic oxidation reactor is input into the middle tank, and the wastewater in the middle tank is input into the super-oxygen photocatalytic oxidation reactor again through the water pump for cyclic treatment.

Further, in S4, the floating plant root system in the ecological composite bed absorbs nitrogen and phosphorus pollutants in the wastewater, and meanwhile, the algae in the ecological composite bed releases oxygen through photosynthesis to provide oxygen for bacteria in the fungus bag to perform aerobic reaction and nutrients, and micromolecular organic matters, nitrogen and phosphorus after bacteria decomposition are absorbed by the algae.

Aiming at the above-mentioned method for treating the waste water of the super-oxygen photocatalytic oxidation of the tail vegetables, the invention also provides a device for treating the waste water of the super-oxygen photocatalytic oxidation of the tail vegetables, which comprises an ME micro-electrolysis reactor, a sedimentation tank, a super-oxygen photocatalytic oxidation reactor and an ecological composite bed which are connected in sequence;

The ME micro-electrolysis reactor is internally provided with a sieve plate, an aeration pipe, a filler and an acid stirring chamber from bottom to top in sequence, wherein the acid stirring chamber is connected with a water pump so that wastewater enters the acid stirring chamber, and the acid stirring chamber is connected with an acid tank;

The sedimentation tank is connected with the ME micro-electrolysis reactor through an overflow pipe, the sedimentation tank is sequentially provided with an inclined pipe and an alkaline stirring chamber from bottom to top, and the alkaline stirring chamber is connected with an alkali tank;

The super-oxygen photocatalytic oxidation reactor comprises a super-oxygen generator and a plurality of reactors connected in series, wherein a micro-nano bubble releaser, a water distribution screen, a catalyst and an ultraviolet lamp are sequentially arranged in each reactor from bottom to top, and the super-oxygen generator is connected with each micro-nano bubble releaser;

The ecological composite bed comprises a plurality of reaction modules connected in series, wherein planting ceramsite, activated carbon, vesuvianite and a floating plate are sequentially arranged in each reaction module from bottom to top, a plurality of floating plant planting holes are formed in the floating plate, the floating plant planting holes are used for planting floating plants, and a fungus bag is arranged at the bottom of the floating plate.

Further, the filler is arranged at the top of the sieve plate, and the aeration pipe is arranged between the filler and the sieve plate;

The bottom of ME micro-electrolysis reactor and sedimentation tank all is equipped with the mud bucket, and mud bucket bottom is equipped with the mud pipe, and the bottom of acid teeter chamber and alkaline teeter chamber all is equipped with the honeycomb duct, and two honeycomb ducts run through respectively to the bottom of packing and the bottom of inclined tube, and the bottom of two honeycomb ducts all is equipped with the reflecting plate, and the reflecting plate is the toper.

Further, the reactor of the super-oxygen photocatalytic oxidation reactor is of a column type tubular structure, a support is arranged outside each reactor, a water inlet is arranged at the bottom of each reactor, an overflow port and a water outlet are arranged at the top of each reactor, the water outlet of one reactor is connected with the water inlet of the other reactor, the ultraviolet lamp is of a strip shape, the ultraviolet lamp extends into the catalyst, the catalyst is a granular catalyst with large specific surface area, and an exhaust port is arranged at the top of each reactor.

Further, the reaction modules of the ecological composite bed are vertically arranged at intervals, a downpipe is arranged between the reaction modules and connected, a water level control valve is arranged on the downpipe, the reaction module at the top end is provided with a water inlet, and the reaction module at the bottom end is provided with a water outlet;

The ecological composite bed also comprises a circulating pump, wherein a water inlet of the circulating pump is connected with the reaction module at the bottommost end, and a water outlet of the circulating pump is connected with the reaction module at the topmost end, so that water flow circulates through each reaction module.

The beneficial effects of the invention are as follows:

in the invention, the micro-electrolysis is used for decoloring, chain breaking and ring breaking to destroy the molecular structure, the degradation is changed into easy degradation, the super-oxygen photocatalytic oxidation is used for oxidation decoloring and deodorizing, and meanwhile, macromolecules are oxidized into micromolecular substances, and the ecological composite bed is used for finally converting the micromolecular substances, nitrogen, phosphorus and the like into carbon dioxide, water, nitrogen and other inorganic substances;

The method can effectively remove chromaticity, reduce the contents of cellulose and lignin, break chains of long-chain fatty compounds and reduce COD concentration, so that the tail water of the vegetable tail vegetable processing wastewater is recycled after being treated to realize the recycling of sewage and wastewater, and the method adopting physics, biology and ecology does not produce secondary pollution, is environment-friendly, has low treatment cost and high efficiency, has an important role in developing vegetable industry, solving the environmental pollution problem caused by industrial development and realizing the recycling of fresh water resources.

Drawings

FIG. 1 is a schematic flow chart of a method for treating waste water of a tail vegetable by super-oxygen photocatalytic oxidation;

FIG. 2 is a schematic diagram of the ME micro-electrolysis reactor and the sedimentation tank of the device for treating the waste water of the tail vegetable by the super-oxygen photocatalytic oxidation;

FIG. 3 is a schematic diagram of a super-oxygen photocatalytic oxidation reactor of the super-oxygen photocatalytic oxidation device for treating waste water of kohlrabi;

FIG. 4 is a schematic diagram of an ecological composite bed structure of a device for treating waste water of the tail vegetables by super-oxygen photocatalytic oxidation;

FIG. 5 is a schematic diagram of the top view structure of an ecological composite bed of the device for treating waste water of the tail vegetables by super-oxygen photocatalytic oxidation;

FIG. 6 is a table showing the quality of effluent water and pollutant removal rate after treatment by the device for treating waste water of the tail vegetable by the super-oxygen photocatalytic oxidation.

In the figure, a super oxygen generator 1, an ultraviolet lamp 2, a reactor 3, a catalyst 4, a bracket 5, a water distribution sieve 6, a micro-nano bubble releaser 7, a reaction module 8, a downpipe 9, a vesuvianite 10, active carbon 11, a ceramic particle 12, a floating plant 13, a fungus bag 14, a floating plate 15, a circulating pump 16, a floating plant planting hole 17, a water level control valve 18, a micro-electrolysis reactor 19 ME, a packing 20, a sieve plate 21, an acid tank 22, an acid stirring chamber 23, an alkali tank 24, an alkali stirring chamber 25, a honeycomb duct 26, an inclined pipe 27, a reflecting plate 28 and a sedimentation tank 29 are arranged.

Detailed Description

The technical scheme of the patent is further described in detail below with reference to the specific embodiments.

Embodiments of the present patent are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the patent and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and are therefore not to be construed as limiting the patent.

In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.

Example 1

Referring to fig. 1, a method for treating waste water of a super-oxygen photocatalytic oxidation tail vegetable is applied to sewage treatment, and in order to recycle tail water, reduce environmental pollution and realize recycling of fresh water resources.

The method for treating the waste water of the tail vegetables by the super-oxygen photocatalytic oxidation comprises the following steps:

S1, pumping wastewater from a water collecting tank through a water pump to enter an acid stirring chamber in an ME micro-electrolysis reactor, adding acid to perform stirring reaction, adjusting the pH value of the wastewater to 3, enabling the stirred wastewater to reach the bottom of a filler through a flow guide pipe, performing intermittent aeration through an aeration pipe, enabling the wastewater to contact the filler in the ME micro-electrolysis reactor under the action of airflow to perform micro-electrolysis reaction, enabling the micro-electrolysis reaction to utilize iron and carbon to form micro primary batteries to perform electrolysis treatment on the wastewater, destroying chromophoric groups, reducing the chromaticity of the wastewater, simultaneously decomposing cellulose into polysaccharide or monosaccharide, decomposing lignin into aromatic compounds, breaking chains to form low-molecular organic matters by long-chain fatty compounds, reducing the chromaticity of the wastewater, increasing the pH to 7.8, and increasing COD.

S2, enabling the wastewater to enter a sedimentation tank through an overflow weir at the upper part of the ME micro-electrolysis reactor after micro-electrolysis reaction, adding alkali to perform stirring reaction, adjusting the pH value of the wastewater to 7, enabling the wastewater to enter water distribution at the bottom of the sedimentation tank through a flow guide pipe, enabling the wastewater of the muddy water mixed solution to pass through an inclined pipe under the action of gravity, enabling heavy mud to sink into a mud bucket to be discharged, enabling the water to pass through the inclined pipe and be discharged from a water outlet weir at the upper part of the sedimentation tank, completing muddy water separation, and enabling supernatant fluid to enter a next treatment unit.

S3: the supernatant fluid after mud-water separation enters a super-oxygen photocatalytic oxidation reactor to react step by step through the super-oxygen photocatalytic oxidation reactors which are sequentially connected in series, super-oxygen generator generates super-oxygen, the super-oxygen is firstly contacted with waste water, the waste water is uniformly distributed with water through a water distribution sieve to intercept particles, then the waste water is contacted with the super-oxygen on the surface of a catalyst, the catalyst adsorbs pollutants in the waste water, the pollutants are intercepted, a reaction medium is provided for the reaction, the reaction speed of the pollutants and the super-oxygen is simultaneously accelerated, under the synergistic effect of ultraviolet light, the super-oxygen is decomposed to generate hydroxyl free radicals, so that the oxidation reaction mainly comprising direct reaction of the super-oxygen and organic matters in water is converted into the oxidation reaction mainly comprising direct reaction of the free radicals and the organic matters, the oxidation potential is improved, and anthocyanin and carotene chromophoric radicals are rapidly oxidized and decomposed, the aromatic organic matters and unsaturated compounds in the wastewater absorb ultraviolet light, hydroxyl free radicals are easier to react with the aromatic compounds and unsaturated compounds to remove the organic matters in the wastewater, the pollutants in the wastewater are subjected to super-oxygen generation, hydroxyl free radicals are oxidized and decomposed to form organic matters and chromophoric groups under the action of ultraviolet light and a particle catalyst, the wastewater becomes clear and transparent for 5-10min, complete decolorization is realized, B/C is improved to 0.28 in 60min, B/C is improved to 0.36 in 120min, COD removal rate is 30% -65%, the wastewater treated by the super-oxygen photocatalytic oxidation reactor is input into an intermediate tank, and the wastewater in the intermediate tank is input into the super-oxygen photocatalytic oxidation reactor again through a water pump for cyclic treatment, so that the wastewater treatment effect is improved.

S4, the wastewater after being circularly treated by the super-oxygen photocatalytic oxidation reactor enters an ecological composite bed, the composite bed area is 2m ², the bed thickness is 200mm, the wastewater is reacted step by the ecological composite beds which are sequentially connected in series, the hydraulic retention time is 10h, the surface load is 10L/m ².d, the circulation volume is 100%, the plant root systems in the ecological composite bed absorb nitrogen and phosphorus pollutants in the wastewater, meanwhile, algae in the ecological composite bed release oxygen through photosynthesis to provide oxygen for bacteria to carry out aerobic reaction and nutrients, and micromolecular organic matters, nitrogen and phosphorus after bacterial decomposition can be utilized by the algae.

Example 2

Aiming at the above method for treating the waste water of the super-oxygen photocatalytic oxidation of the pickled mustard, the embodiment provides a device for treating the waste water of the super-oxygen photocatalytic oxidation of the pickled mustard;

Referring to fig. 2 to 5, the device for treating the waste water of the super-oxidized photocatalytic oxidation of the tail vegetables comprises an ME micro-electrolysis reactor 19, a sedimentation tank 29, a super-oxidized photocatalytic oxidation reactor and an ecological composite bed which are connected in sequence.

The inside of ME micro-electrolysis reactor 19 is equipped with sieve 21, the aeration pipe, packing 20 and acid stirring room 23 from down up in proper order, packing 20 sets up in sieve 21 top, thereby guarantee to support packing 20, guarantee simultaneously that pollutant deposit accessible sieve 21 deposits on ME micro-electrolysis reactor 19 bottom mud bucket, the aeration pipe sets up between packing 20 and sieve 21, the aeration pipe is connected with outside fan, the intermittent type formula aeration of aeration pipe, thereby effectively reduce the disturbance to pollutant deposit, acid stirring room 23 is connected with the water pump, so that waste water gets into acid stirring room 23, acid stirring room 23 is connected with acid tank 22, add acid in to waste water through acid tank 22, thereby adjust the pH value of waste water.

The sedimentation tank 29 is connected with the ME micro-electrolysis reactor 19 through an overflow pipe, so that wastewater after micro-electrolysis reaction enters the sedimentation tank 29, the sedimentation tank 29 is sequentially provided with an inclined pipe 27 and an alkaline stirring chamber 25 from bottom to top, the inclined pipe 27 can perform mud-water separation, wastewater sedimentation treatment is performed, the alkaline stirring chamber 25 is connected with an alkali tank 24, and alkali is added into the wastewater through the alkali tank 24, so that the pH value of the wastewater is adjusted.

The ME micro-electrolysis reactor 19 and the bottom of sedimentation tank 29 all are equipped with the mud bucket, mud bucket bottom is equipped with the mud pipe, thereby conveniently discharge pollutant deposit, the bottom of acid teeter chamber 23 and alkaline teeter chamber 25 all is equipped with honeycomb duct 26, two honeycomb ducts 26 run through respectively to the bottom of packing 20 and the bottom of inclined tube 27, a honeycomb duct 26 makes things convenient for waste water to come to the packing bottom, conveniently carry out micro-electrolysis reaction, another honeycomb duct 26 makes things convenient for waste water to come to the inclined tube 27 bottom, carry out mud-water separation, the bottom of two honeycomb ducts 26 all is equipped with reflecting plate 28, reflecting plate 28 is the toper, thereby evenly distribute water, avoid causing the disturbance to pollutant deposit.

The super-oxygen photocatalytic oxidation reactor comprises a super-oxygen generator 1 and a plurality of reactors 3 which are connected in series, wherein a micro-nano bubble releaser 7, a water distribution screen 6, a catalyst 4 and an ultraviolet lamp 2 are sequentially arranged inside each reactor 3 from bottom to top, the super-oxygen generator 1 is connected with each micro-nano bubble releaser 7, the reactors 3 of the super-oxygen photocatalytic oxidation reactor are of column type tubular structures, a bracket 5 is arranged outside each reactor 3, a water inlet is arranged at the bottom of each reactor 3, an overflow port and a water outlet are arranged at the top of each reactor, the water outlet of one reactor 3 is connected with the water inlet of the other reactor 3, the ultraviolet lamp 2 is of a strip shape, the ultraviolet lamp 2 extends into the catalyst 4, the catalyst 4 is a granular catalyst with a large specific surface area, the top of each reactor 3 is provided with an exhaust port, organic matters in waste water can be effectively removed, the biodegradability of the waste water can be improved, the reactors 3 can be operated in series, and the purification of the waste water can be realized by decomposing the pollutants in the waste water step by step.

The ecological composite bed comprises a circulating pump 16 and a plurality of reaction modules 8, wherein planting ceramsite 12, activated carbon 11, volcanic rocks 10 and a floating plate 15 are sequentially arranged in each reaction module 8 from bottom to top, a plurality of floating plant planting holes 17 are formed in the floating plate 15, the floating plant planting holes 17 are used for planting floating plants 13, fungus bags 14 are arranged at the bottom of the floating plate 15, the root systems of the floating plants 13 can be implanted into the bed to absorb pollutants such as nitrogen and phosphorus in wastewater, meanwhile, an algae-bacteria symbiotic system can be formed at the lower layer of the floating plate 15, algae releases oxygen through photosynthesis to provide oxygen for bacteria to perform aerobic reaction and nutrients, and micromolecular organic matters, nitrogen and phosphorus after bacterial decomposition can be utilized by the algae, so that pollutants in sewage are reduced.

The reaction modules 8 of the ecological composite bed are vertically arranged at intervals and are connected in series, so that pollutants in wastewater are decomposed step by the reaction modules 8, the wastewater is purified step by step through the ecological composite bed, a downpipe 9 is arranged between the reaction modules 8 and is connected, a water level control valve 18 is arranged on the downpipe 9, the topmost reaction module 8 is provided with a water inlet, the bottommost reaction module 8 is provided with a water outlet, the water inlet of a circulating pump 16 is connected with the bottommost reaction module 8, and the water outlet is connected with the topmost reaction module 8, so that water flow circulates through the reaction modules 8, each reaction module 8 has a perfect ecological system, the treatment efficiency is high, the system is stable, meanwhile, the circulating pump 16 can be used for circulating, even if the water inlet load is higher, the system is diluted and buffered, the system is ensured to be more stable, and the internal circulation and the downpipe 9 can reoxygenate the wastewater, so that the oxygen content in the water is improved, and the purification effect is improved.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims

1. A method for treating waste water of a superoxygenated photocatalytic oxidation tail vegetable is characterized by comprising the following steps:

2. The method for treating waste water of a super-oxidized photocatalytic oxidation of kohlrabi as set forth in claim 1, wherein in S1, the ME micro-electrolysis reactor uses iron and carbon to form micro-primary cells for the electrolytic treatment of waste water.

3. The method for treating the waste water of the super-oxidized photocatalytic oxidation of the pickled mustard tuber according to claim 1, wherein in the step S3, super-oxygen is input into the super-oxidized photocatalytic oxidation reactor, the waste water is contacted with the super-oxygen, then particles in the waste water are intercepted by a water distribution sieve, finally the waste water is contacted with the super-oxygen on the surface of a catalyst, the catalyst adsorbs pollutants in the waste water, the pollutants are intercepted, a reaction medium is provided for the reaction, and meanwhile, the reaction speed of the pollutants and the super-oxygen is accelerated.

4. A method for treating waste water from the photocatalytic oxidation of Chinese cabbage by super-oxygen as set forth in claim 3, wherein when said waste water is contacted with super-oxygen on the surface of said catalyst, said super-oxygen is decomposed to generate hydroxyl radicals by the synergistic action of ultraviolet light, so that the oxidation reaction of super-oxygen with organic matter in water is converted into the oxidation reaction of free radicals with organic matter.

5. The method for treating waste water of the super-oxidized photocatalytic oxidation of Chinese cabbage in claim 1, wherein in S3, the waste water treated by the super-oxidized photocatalytic oxidation reactor is input into a middle tank, and the waste water in the middle tank is input into the super-oxidized photocatalytic oxidation reactor again through a water pump for cyclic treatment.

6. The method for treating waste water of the super-oxidized by photocatalysis of claim 1, wherein in the step S4, the floating plant root system in the ecological composite bed absorbs nitrogen and phosphorus pollutants in the waste water, meanwhile, algae in the ecological composite bed release oxygen through photosynthesis to provide oxygen for bacteria in the fungus bag for aerobic reaction and nutrients, and micromolecular organic matters, nitrogen and phosphorus after bacteria decomposition are absorbed by the algae.

7. The device for treating the waste water of the tail vegetables by the super-oxygen photocatalytic oxidation is characterized by comprising an ME micro-electrolysis reactor (19), a sedimentation tank (29), the super-oxygen photocatalytic oxidation reactor and an ecological composite bed which are connected in sequence;

The internal part of the ME micro-electrolysis reactor (19) is sequentially provided with a sieve plate (21), an aeration pipe, a filler (20) and an acid stirring chamber (23) from bottom to top, the acid stirring chamber (23) is connected with a water pump so that wastewater enters the acid stirring chamber (23), and the acid stirring chamber (23) is connected with an acid tank (22);

The sedimentation tank (29) is connected with the ME micro-electrolysis reactor (19) through an overflow pipe, the sedimentation tank (29) is sequentially provided with an inclined pipe (27) and an alkaline stirring chamber (25) from bottom to top, and the alkaline stirring chamber (25) is connected with an alkali tank (24);

The super-oxygen photocatalytic oxidation reactor comprises a super-oxygen generator (1) and a plurality of reactors (3) which are connected in series, wherein a micro-nano bubble releaser (7), a water distribution screen (6), a catalyst (4) and an ultraviolet lamp (2) are sequentially arranged in each reactor (3) from bottom to top, and the super-oxygen generator (1) is connected with each micro-nano bubble releaser (7);

The ecological composite bed comprises a plurality of reaction modules (8) which are connected in series, wherein each reaction module (8) is internally provided with planting ceramsite (12), activated carbon (11), vesuvianite (10) and a floating plate (15) from bottom to top in sequence, the floating plate (15) is provided with a plurality of floating plant planting holes (17), the floating plant planting holes (17) are used for planting floating plants (13), and the bottom of the floating plate (15) is provided with a fungus bag (14).

8. The device for treating waste water of the super-oxidized photocatalytic oxidation of the Chinese cabbage, as set forth in claim 7, wherein the filler (20) is disposed on top of the screen plate (21), and the aeration pipe is disposed between the filler (20) and the screen plate (21);

the ME micro-electrolysis reactor (19) with the bottom of sedimentation tank (29) all is equipped with the mud bucket, and mud bucket bottom is equipped with the mud pipe, acid teeter chamber (23) with the bottom of alkaline teeter chamber (25) all is equipped with honeycomb duct (26), two honeycomb duct (26) run through respectively to the bottom of packing (20) with the bottom of inclined tube (27), two the bottom of honeycomb duct (26) all is equipped with reflecting plate (28), and reflecting plate (28) are the toper.

9. The device for treating the waste water of the super-oxidized photocatalytic oxidation of the dish as set forth in claim 7, wherein the reactors (3) of the super-oxidized photocatalytic oxidation reactors are of a column type tubular structure, a support (5) is arranged outside each reactor (3), a water inlet is arranged at the bottom of each reactor (3), an overflow port and a water outlet are arranged at the top of each reactor, the water outlet of one reactor (3) is connected with the water inlet of the other reactor (3), the ultraviolet lamp (2) is of a strip shape, the ultraviolet lamp (2) extends into the catalyst (4), the catalyst (4) is a granular catalyst with a large specific surface area, and an exhaust port is arranged at the top of each reactor (3).

10. The device for treating the waste water of the super-oxidized photocatalytic oxidation of the tail vegetables, which is characterized in that the reaction modules (8) of the ecological composite bed are vertically arranged at intervals, a downpipe (9) is arranged between the reaction modules (8) for connection, a water level control valve (18) is arranged on the downpipe (9), the reaction module (8) at the top end is provided with a water inlet, and the reaction module (8) at the bottom end is provided with a water outlet;

the ecological composite bed also comprises a circulating pump (16), wherein a water inlet of the circulating pump (16) is connected with the bottommost reaction module (8), and a water outlet of the circulating pump is connected with the topmost reaction module (8) so as to enable water flow to circulate through each reaction module (8).