CN106830473A - The advanced oxidization method of NSAIDs in a kind of ultraviolet hydrogen peroxide removal sewage - Google Patents

Abstract

The invention discloses an advanced oxidation method for removing non-steroidal anti-inflammatory drugs in sewage by ultraviolet hydrogen peroxide. The sewage is sequentially passed through a sedimentation tank and a secondary sedimentation tank to separate large particles; the sewage separated from large particles is passed into Add H2O2 solution with a mass fraction of 30% in the _photoreactor , turn _on the UV lamp tube, carry out the oxidation reaction, then carry out disinfection through the disinfection pool, and finally detect the content of non-steroidal anti-inflammatory drugs in the sewage; the present invention uses UV The advanced oxidation process effectively removes non-steroidal anti-inflammatory drugs in sewage, makes sewage discharge meet the requirements, and reduces the environmental risk of non-steroidal anti-inflammatory drugs. The method has the advantages of simple equipment, convenient operation, reasonable economy, etc., and makes up for the shortcomings of the current sewage purification process.

Description

An advanced oxidation method for removing non-steroidal anti-inflammatory drugs in sewage by ultraviolet hydrogen peroxide

technical field

The invention relates to the technical field of non-steroidal anti-inflammatory drug treatment, in particular to an advanced oxidation method for removing non-steroidal anti-inflammatory drugs in sewage by ultraviolet hydrogen peroxide.

Background technique

Non-steroidal anti-inflammatory drugs (NSAIDs) are a class of anti-inflammatory drugs widely used in clinical practice, and their annual consumption in my country is second only to anti-infective drugs. According to the chemical structure, NSAIDs can be divided into the following categories: formic acids, such as aspirin; acetic acids, such as diclofenac, indomethacin; propionic acids, such as ibuprofen, naproxen; oxicams, such as Piroxicam, meloxicam; coxibs, such as celecoxib, rofecoxib; pyrazolones, such as phenylbutazone, aminopyrine; others, such as nimesulide. These drugs cannot be completely absorbed by the human body after being taken by people, and the remaining part will be excreted into the environment with urine and feces. The sewage treatment plant is its main gathering place. As a new class of pollutants, existing toxicity studies have shown that NSAIDs can cause ecotoxicity to aquatic organisms such as medaka, zebrafish, magna, and duckweed. Therefore, how to effectively remove non-steroidal anti-inflammatory drugs in sewage treatment systems has attracted increasing attention.

The advanced treatment process of sewage is an important link to ensure the safe discharge of sewage. It is of great significance to study the effect of different advanced treatment processes on the removal of NSAIDs. Among the current advanced treatment processes, activated carbon adsorption, coagulation precipitation, and chlorination disinfection are not ideal for the removal of NSAIDs. Hydrogen peroxide has no removal effect on non-steroidal anti-inflammatory drugs, and the advanced ozone oxidation process can only partially remove non-steroidal anti-inflammatory drugs under the dosage and contact time of the actual sewage treatment plant. There is no systematic research on the removal of NSAIDs in actual sewage using UV advanced oxidation process.

Contents of the invention

The technical problem solved by the present invention is to provide an advanced oxidation method for removing non-steroidal anti-inflammatory drugs in sewage by ultraviolet hydrogen peroxide. This method has better removal effect on diclofenac, ibuprofen and naproxen, and can Removal of NSAIDs in sewage.

Technical scheme of the present invention is:

An advanced oxidation method for removing non-steroidal anti-inflammatory drugs in sewage by ultraviolet hydrogen peroxide, comprising the following steps:

(1) Randomly take the sewage supernatant for 3-5 times, detect the concentration of non-steroidal anti-inflammatory drugs in the supernatant, and record the detection data;

(2) Pass the sewage into the grit chamber, add flocculant in the grit chamber, and the mass-to-volume ratio of the sewage to the sewage is 10-100g: 1L. Stir for 5-15 minutes to coagulate, then slowly stir at a speed of 60-80r/min for 5-15 minutes to flocculate, then the sewage flows to the secondary sedimentation tank by gravity, and a pH regulator is added to make the pH of the sewage less than 8.0. The secondary sedimentation tank filters out particles above 2 μm;

(3) The supernatant after the separation of the secondary sedimentation tank is discharged into the photoreactor through a water pump, and a 30% H ₂ O ₂ solution is added to the supernatant to make H ₂ O ₂ and the non-steroidal anti-inflammatory drug The molar concentration ratio is (1-100): 1, and then the ultraviolet lamp is used for light treatment, the light time is 5-10min, and it is kept uniform by electromagnetic stirring; the last added molar concentration is 0.1mM Na ₂ SO ₃ ;

(4) Step ( ₃ ) gained sewage is discharged into the disinfection tank, and ClO gas is passed into the disinfection tank, so that the available chlorine content in the sewage is 5-20ppm; the water sample in the disinfection tank is subjected to NSAIDs at random For the test, record the test result, compare and analyze it with the test result recorded in step 1, and finally discharge the effluent from the contact disinfection tank.

Further, the flocculant described in step (1) is obtained by mixing an organic flocculant and an inorganic flocculant at a mass ratio of 1:1-1.5, and the organic flocculant is polyacrylamide, polydimethyldiallyl ammonium chloride, polyvinylpyridinium ammonium or a mixture of two, the inorganic flocculant is a mixture of one or more of polyaluminum iron bis-acid, polyaluminum chloride, and ferrous sulfate, which can form a relatively Large flocs are precipitated, effectively removing various suspended solids and macromolecular substances in sewage.

Further, the pH adjuster in step (1) is H ₂ SO ₄ with a concentration of 0.05 mol/L, and the pH adjuster can make the sewage acidic or weakly alkaline through adjustment to avoid corrosion of the photoreactor.

Further, the photoreactor described in step (2) is mainly made of quartz glass, a quartz tube sleeve is placed vertically in the middle, and an ultraviolet lamp is placed in the quartz tube. The quartz glass has a high transmittance to ultraviolet light, which promotes the decomposition of H ₂ O ₂ to produce ·OH.

Further, the ultraviolet lamp is a 22W low-pressure mercury lamp, the emission wavelength is 254nm, and the ultraviolet light intensity on the outer wall of the quartz tube is 1.35mW/cm ² .

Further, the detection method of non-steroidal anti-inflammatory drugs in sewage described in step (1) and step (4) is high performance liquid chromatography-tandem mass spectrometry, and the specific steps are as follows:

(A) Concentration and purification of three kinds of NSAIDs:

(a) Equilibrate the CNW HLB small column with 3mL methanol;

(b) Wash the CNW HLB cartridge with 3mL of pure water;

(c) Pass 50mL water sample through the CNW HLB column at a speed of 1mL/min;

(d) wash the CNW HLB small column again with 3mL of 5% methanol;

(e) Elute with 6mL of methanol solution, blow the eluent to 1mL with liquid nitrogen, and store in a refrigerator at 4°C for subsequent on-board testing;

(B) The concentration of NSAIDs was detected by liquid chromatography-mass spectrometry.

Further, the removal rate of NSAIDs=(1-C _t /C ₀ )×100%, C ₀ is the initial concentration, and C _t is the concentration of NSAIDs at the reaction time t. During kinetic simulation, the ordinate is Ln(C ₀ /C _t ), where C ₀ is the initial concentration, C _t is the concentration of NSAIDs at the reaction time t, and the NSAIDs tested include diclofenac , ibuprofen, naproxen.

The beneficial effects of the present invention are:

1. The present invention uses UV advanced oxidation technology to catalyze and decompose some oxidants, etc., to generate highly oxidizing hydroxyl radicals (OH) so as to decompose or mineralize various pollutants in water, and can effectively remove non-steroidal pollutants in sewage. Anti-inflammatory drugs are used to meet the requirements of sewage discharge and avoid environmental pollution;

2. The method of the present invention has good treatment effect, is also more economical, has the advantages of simple equipment, easy operation, cheap cost, etc., and has no pollution and high stability;

3. The present invention makes up for the shortcomings of the current pollution purification process, improves the shortcomings of the existing technology, such as poor effect on non-steroidal anti-inflammatory drugs and unstable operation, and fills in the blank of domestic and foreign related technologies for removing non-steroidal anti-inflammatory drugs in water sources .

Description of drawings

Fig. 1 is the operation flowchart of the present invention;

Fig. 2 is the relationship diagram of the impact of light time on the degradation of non-steroidal anti-inflammatory drugs;

Fig. 3 is a graph showing the influence of oxidant concentration on the removal effect of NSAIDs.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are the embodiment of the present invention Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The present invention is further specifically described in conjunction with specific embodiments now.

This embodiment is carried out with the secondary biological effluent of a municipal sewage treatment plant in Nanjing as the object.

Embodiment 1: A kind of advanced oxidation method of ultraviolet hydrogen peroxide removal non-steroidal anti-inflammatory drug in sewage, comprises the following steps:

(1) Randomly take the sewage supernatant 3 times, detect the concentration of non-steroidal anti-inflammatory drugs in the supernatant, record the detection data, and take the average value;

(2) Pass the sewage into the grit chamber, add flocculant into the grit chamber, the mass-to-volume ratio to the sewage is 20g: 1L, the grit chamber has a variable speed agitator, first stir at a speed of 150r/min for 5min for coagulation , and then stirred at a slow speed of 60r/min for 5 minutes to flocculate, and then the sewage flows to the secondary sedimentation tank by gravity, and a pH regulator is added to make the pH of the sewage 5.0, and the particles above 2 μm are filtered out through the secondary sedimentation tank; flocculation The agent is obtained by mixing organic flocculant and inorganic flocculant at a mass ratio of 1:1. The organic flocculant is a mixture of polyacrylamide, polydimethyldiallyl ammonium chloride and polyvinylpyridinium ammonium. It is a mixture of bis-acid polyaluminum iron, polyaluminum chloride, and ferrous sulfate; the pH regulator is H ₂ SO ₄ with a concentration of 0.05mol/L;

(3) The supernatant after the separation of the secondary sedimentation tank is discharged into the photoreactor through a water pump, and a 30% H ₂ O ₂ solution is added to the supernatant to make H ₂ O ₂ and the non-steroidal anti-inflammatory drug The molar concentration ratio is 30:1, and then use ultraviolet light for light treatment, the light time is 5min, and keep it uniform by electromagnetic stirring; the last added molar concentration is 0.1mM Na ₂ SO ₃ ; the photoreactor is mainly made of quartz glass material , a quartz tube sleeve is placed vertically in the middle, and an ultraviolet lamp is placed in the quartz tube to emit ultraviolet light through the ultraviolet lamp; the ultraviolet lamp is a 22W low-pressure mercury lamp, the luminous wavelength is 254nm, and the ultraviolet light intensity on the outer wall of the quartz tube wall is 1.35mW/cm ² ;

(4) step (3) gained sewage is discharged into the disinfection tank, and in the disinfection tank, feeds into ClO ₂ gas, making available chlorine content in the sewage is 5ppm; The water sample of the disinfection tank at random carries out the detection of non-steroidal anti-inflammatory drugs , record the test result, compare and analyze it with the test result recorded in step 1, and finally discharge the effluent from the contact disinfection tank to the urban sewage pipe network;

The detection method of a kind of non-steroidal anti-inflammatory drug in sewage described in step (1), step (4) is high performance liquid chromatography-tandem mass spectrometry, and concrete steps are as follows:

(A) Concentration and purification of three kinds of NSAIDs:

(a) Equilibrate the CNW HLB small column with 3mL methanol;

(b) Wash the CNW HLB cartridge with 3mL of pure water;

(c) Pass 50mL water sample through the CNW HLB column at a speed of 1mL/min;

(d) wash the CNW HLB small column again with 3mL of 5% methanol;

(e) Elute with 6mL of methanol solution, blow the eluent to 1mL with liquid nitrogen, and store in a refrigerator at 4°C for subsequent on-board testing;

(B) The concentration of NSAIDs was detected by liquid chromatography-mass spectrometry.

Embodiment 2: a kind of advanced oxidation method of ultraviolet hydrogen peroxide removal non-steroidal anti-inflammatory drug in sewage, comprises the following steps:

(1) Randomly take the sewage supernatant 4 times, detect the concentration of non-steroidal anti-inflammatory drugs in the supernatant, and record the detection data;

(2) Pass the sewage into the grit chamber, add flocculant into the grit chamber, the mass-to-volume ratio to the sewage is 50g:1L, the grit chamber has a variable speed agitator, and first stir at a speed of 200r/min for 10min to coagulate , and then stirred at a slow speed of 70r/min for 10min to flocculate, then the sewage flows to the secondary sedimentation tank by gravity, and a pH regulator is added to make the pH of the sewage 7.0, and the particles above 2 μm are filtered out through the secondary sedimentation tank; flocculation The agent is obtained by mixing organic flocculant and inorganic flocculant at a mass ratio of 1:1.2. The organic flocculant is a mixture of polyacrylamide, polydimethyldiallylammonium chloride and polyvinylpyridinium , the inorganic flocculant is a mixture of bis-acid polyaluminum iron, polyaluminum chloride, and ferrous sulfate; the pH regulator is H ₂ SO ₄ with a concentration of 0.05mol/L;

(3) The supernatant after the separation of the secondary sedimentation tank is discharged into the photoreactor through a water pump, and a 30% H ₂ O ₂ solution is added to the supernatant to make H ₂ O ₂ and the non-steroidal anti-inflammatory drug The molar concentration ratio is 50:1, and then use ultraviolet light for light treatment, the light time is 5-10min, and keep it uniform by electromagnetic stirring; the last added molar concentration is 0.1mM Na ₂ SO ₃ ; the photoreactor mainly uses quartz Glass material, a quartz tube sleeve is placed vertically in the middle, an ultraviolet lamp is placed in the quartz tube, and ultraviolet light is emitted through the ultraviolet lamp; the ultraviolet lamp is a 22W low-pressure mercury lamp, the emission wavelength is 254nm, and the ultraviolet light intensity on the outer wall of the quartz tube wall is 1.35mW/cm ² ;

(4) step (3) gained sewage is discharged into the disinfection tank, and in the disinfection tank, feeds into ClO ₂ gas, making the available chlorine content in the sewage be 10ppm; The water sample of the disinfection tank at random carries out the detection of non-steroidal anti-inflammatory drugs , record the test results, compare and analyze them with the test results recorded in step 1, and finally discharge the effluent from the contact disinfection tank to the urban sewage pipe network.

The detection method of the non-steroidal anti-inflammatory drug in the sewage described in step (1), step (4) is high performance liquid chromatography-tandem mass spectrometry, and the specific steps are as follows:

(A) Concentration and purification of three kinds of NSAIDs:

(a) Equilibrate the CNW HLB small column with 3mL methanol;

(b) Wash the CNW HLB cartridge with 3mL of pure water;

(c) Pass 50mL water sample through the CNW HLB column at a speed of 1mL/min;

(d) wash the CNW HLB small column again with 3mL of 5% methanol;

(e) Elute with 6mL of methanol solution, blow the eluent to 1mL with liquid nitrogen, and store in a refrigerator at 4°C for subsequent on-board testing;

(B) The concentration of NSAIDs was detected by liquid chromatography-mass spectrometry.

Embodiment 3: a kind of advanced oxidation method of ultraviolet hydrogen peroxide removal non-steroidal anti-inflammatory drug in sewage, comprises the following steps:

(1) Take the sewage supernatant at random for 5 times, detect the concentration of non-steroidal anti-inflammatory drugs in the supernatant, and record the detection data;

(2) Pass the sewage into the grit chamber, add flocculant into the grit chamber, the mass-to-volume ratio to the sewage is 100g: 1L, the grit chamber has a variable-speed agitator, first stir quickly at a speed of 250r/min for 10min to coagulate , and then stirred at a slow speed of 80r/min for 5-15min to flocculate, and then the sewage flows to the secondary sedimentation tank by gravity, and a pH regulator is added to make the pH of the sewage 8.0, and the particles above 2 μm are filtered through the secondary sedimentation tank The flocculant is obtained by mixing an organic flocculant and an inorganic flocculant at a mass ratio of 1:1.5, and the organic flocculant is two of polyacrylamide, polydimethyldiallylammonium chloride, and polyvinylpyridinium A mixture, the inorganic flocculant is a mixture of bis-acid polyaluminum iron, polyaluminum chloride, and ferrous sulfate; the pH regulator is H ₂ SO ₄ with a concentration of 0.05mol/L;

( ₄ ) The supernatant after the separation of the secondary sedimentation tank is discharged into the photoreactor through a water pump, and a 30 _% H2O2 solution is added to the supernatant, so that _H2O2 and _NSAID The molar concentration ratio is 100:1, and then use ultraviolet light for light treatment, the light time is 10min, and keep it uniform by electromagnetic stirring; the last added molar concentration is 0.1mM Na ₂ SO ₃ ; the photoreactor is mainly made of quartz glass material , a quartz tube sleeve is placed vertically in the middle, and an ultraviolet lamp is placed in the quartz tube to emit ultraviolet light through the ultraviolet lamp; the ultraviolet lamp is a 22W low-pressure mercury lamp, the luminous wavelength is 254nm, and the ultraviolet light intensity on the outer wall of the quartz tube wall is 1.35mW/cm ² ;

(4) step (3) gained sewage is discharged into the disinfection tank, and in the disinfection tank, feeds into ClO ₂ gas, making the available chlorine content in the sewage be 20ppm; The water sample in the disinfection tank at random carries out the detection of non-steroidal anti-inflammatory drugs , record the test results, compare and analyze them with the test results recorded in step 1, and finally discharge the effluent from the contact disinfection tank to the urban sewage pipe network.

The detection method of the non-steroidal anti-inflammatory drug in the sewage described in step (1), step (4) is high performance liquid chromatography-tandem mass spectrometry, and the specific steps are as follows:

(A) Concentration and purification of three kinds of NSAIDs:

(a) Equilibrate the CNW HLB small column with 3mL methanol;

(b) Wash the CNW HLB cartridge with 3mL of pure water;

(c) Pass 50mL water sample through the CNW HLB column at a speed of 1mL/min;

(d) wash the CNW HLB small column again with 3mL of 5% methanol;

(e) Elute with 6mL of methanol solution, blow the eluent to 1mL with liquid nitrogen, and store in a refrigerator at 4°C for subsequent on-board testing;

(B) The concentration of NSAIDs was detected by liquid chromatography-mass spectrometry.

One, embodiment result analysis:

(1) Take 500 mL of water sample and filter it with a 0.22 μm mixed fiber membrane, and store it in a refrigerator at 4°C after filtration for the subsequent solid phase extraction operation and subsequent determination of the concentration of non-steroidal anti-inflammatory drugs. The mean ± standard deviation was taken for analysis. The simple experimental process is shown in Figure 1.

(A) Concentration and purification of three non-steroidal anti-inflammatory drugs

The selected solid-phase extraction column is the CNW HLB (60mg, 3mL) aqueous phase-organic equilibrium cartridge provided by Shanghai Anpu. Specific steps are as follows:

(a) Equilibrate the CNW HLB small column with 3mL methanol;

(b) Wash the CNW HLB cartridge with 3mL of pure water;

(c) Pass 50mL water sample through the CNW HLB column at a speed of 1mL/min;

(d) wash the CNW HLB small column again with 3mL of 5% methanol;

(e) Elute with 6mL of methanol solution, blow the eluent to 1mL with liquid nitrogen, and store in a refrigerator at 4°C for subsequent on-board testing;

(B) Liquid-mass spectrometry detects the concentration of non-steroidal anti-inflammatory drugs:

The selected liquid mass spectrometry instrument is Xevo TQ-S UPLC-MS liquid mass spectrometry instrument of Waters Company in the United States, which adopts electrospray ionization source (ESI) and negative ionization multiple reaction monitoring mode (MRM). The parameters for MRM are listed in Table 1.

Table 1. Multiple Reaction Monitoring Parameters for NSAIDs

The chromatographic column used for liquid phase separation was Acquity UPLC BEH C18 chromatographic column (2.1×50mm, 1.7um), and the column temperature was kept at 30°C. The selected mobile phases are water (A) and methanol (B). The mobile phase was ultrasonically degassed before use. The flow rate of the liquid phase was 0.1 mL/min, the proportion of phase A was 20%, the proportion of phase B was 80%, and the isocratic elution was carried out for 5 minutes. The injection volume was 10 μL, and the sample was injected by an autosampler.

2. Analysis of the removal rate of non-steroidal anti-inflammatory drugs

The concentration unit of NSAIDs in this article is μg/L

The removal rate of NSAIDs=(1-C _t /C ₀ )×100%, C ₀ is the initial concentration, and C _t is the concentration of NSAIDs at the reaction time t. During kinetic simulation, the ordinate is Ln(C ₀ /C _t ), where C ₀ is the initial concentration, C _t is the concentration of NSAIDs at the reaction time t, and the NSAIDs tested include diclofenac , ibuprofen, naproxen.

The analysis shows that:

1. The effect of UV light time on the removal of target pollutants

The effect of light time on the degradation of three NSAIDs is shown in Figure 2. Diclofenac, ibuprofen, and naproxen can be directly photolyzed under the irradiation of ultraviolet light. The degradation reactions of the three NSAIDs are first-order reaction kinetics, and the reaction rate The constants are 5.04×10 ^-3 s ^-1 , 0.291×10 ^-3 s ^-1 , and 0.208×10 ^-3 s ^-1 , respectively.

2. The effect of the molar concentration ratio of H ₂ O ₂ and NSAIDs on the removal of target pollutants

As shown in Figure 3, when irradiated with a 22W low-pressure mercury lamp for 5 minutes, when the molar concentration of H ₂ O ₂ and NSAIDs is between 1:1 and 100:1, all target pollutants removal rate increased. Generally speaking, when the concentration of H ₂ O ₂ is too high, it will react with the generated OH to consume OH, so there is an optimal value for the dosage of oxidant. However, the three NSAIDs in this case are all refractory substances, and the removal rate gradually increases with the increase of the dosage of oxidant. Considering the economy of the actual process operation, the oxidant dosage of 100:1 is selected as the optimal dosage. When UV/H ₂ O ₂ process was used to degrade NSAIDs, the degradation rates of the three substances were greatly improved, and the removal rate could reach 90% in 5 minutes.

3. The influence of light source intensity on the removal of target pollutants

In this experiment, two common UV light sources in the UV/AOP process were selected, namely 22W low-pressure mercury lamp and 300W medium-pressure mercury lamp, with 100:1 oxidant dosage and 5-minute reaction conditions. The removal effect is shown in Table 2. When a 22W low-pressure mercury lamp is used, it has a good removal effect on the three NSAIDs. From the perspective of energy consumption, a 22W low-pressure mercury lamp is selected as the light source.

Table 2. Comparison of the removal effects of two light sources on NSAIDs

In summary, the method of the present invention can effectively remove NSAIDs in sewage. This shows that various components and parameters in the method of the present invention are all optimal choices, and can realize the best effect of the method of the present invention.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention to other forms. Any skilled person who is familiar with this profession may use the technical content disclosed above to change or remodel it into an equivalent change. Example. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (6)

1. a kind of advanced oxidation method of UV hydrogen peroxide removal non-steroidal anti-inflammatory drug in sewage, it is characterized in that, comprises the following steps: (1) Randomly take the sewage supernatant for 3-5 times, detect the concentration of non-steroidal anti-inflammatory drugs in the supernatant, and record the detection data; (2) Pass the sewage into the grit chamber, add flocculant in the grit chamber, and the mass-to-volume ratio of the sewage to the sewage is 10-100g: 1L. Stir for 5-15 minutes to coagulate, then slowly stir at a speed of 60-80r/min for 5-15 minutes to flocculate, then the sewage flows to the secondary sedimentation tank by gravity, and a pH regulator is added to make the pH of the sewage less than 8.0. The secondary sedimentation tank filters out particles above 2 μm; (3) the supernatant after the separation of the secondary settling tank is discharged into the photoreactor by a water pump, and adding mass concentration to the supernatant is 30% H2O2 solution, so that H2O2 and the molar concentration ratio of non-steroidal anti-inflammatory drugs are ( 1-100): 1, then use an ultraviolet lamp to carry out light treatment, the light time is 5-10min, keep uniform by electromagnetic stirring; the last added molar concentration is 0.1mM Na2SO3; (4) step (3) gained sewage is discharged into the disinfection tank, and in the disinfection tank, feeds ClO2 gas, making the available chlorine content in the sewage be 5-20ppm; Test, record the test results, compare and analyze with the test results recorded in step 1, and finally discharge the effluent from the contact disinfection tank. 2. a kind of ultraviolet hydrogen peroxide as claimed in claim 1 removes the advanced oxidation method of non-steroidal anti-inflammatory drug in sewage, it is characterized in that, the flocculant described in step (2) is organic flocculant and inorganic flocculant It is obtained by mixing the mass ratio of 1: (1-1.5), the organic flocculant is polyacrylamide, polydimethyldiallylammonium chloride, polyvinylpyridinium ammonium or a mixture of two, so The above-mentioned inorganic flocculant is a mixture of one or more of bis-acid polyaluminum iron, polyaluminum chloride and ferrous sulfate. 3. a kind of ultraviolet hydrogen peroxide as claimed in claim 1 removes the advanced oxidation method of non-steroidal anti-inflammatory drug in sewage, and the pH adjusting agent described in step (2) is the H of concentration 0.05mol/L SO . 4. a kind of ultraviolet hydrogen peroxide as claimed in claim 1 removes the advanced oxidation method of non-steroidal anti-inflammatory drug in sewage, it is characterized in that, the photoreactor described in step (3) mainly adopts quartz glass material, middle Place the quartz tube sleeve vertically, place an ultraviolet lamp in the quartz tube, and emit ultraviolet light through the ultraviolet lamp. 5. the advanced oxidation method of a kind of ultraviolet hydrogen peroxide removal non-steroidal anti-inflammatory drug in sewage as described in claim 1-4, it is characterized in that, described ultraviolet lamp is 22W low-pressure mercury lamp, and luminous wavelength is 254nm , the ultraviolet light intensity on the outer wall of the quartz tube wall is 1.35mW/cm2. 6. the advanced oxidation method of a kind of ultraviolet hydrogen peroxide removal non-steroidal anti-inflammatory drug in sewage as claimed in claim 1, is characterized in that, the non-steroidal anti-inflammatory drug in the sewage described in step (1), step (4) The detection method of anti-inflammatory drugs is high performance liquid chromatography-tandem mass spectrometry, and the specific steps are as follows: (A) Concentration and purification of three kinds of NSAIDs: (a) Equilibrate the CNW HLB small column with 3mL methanol; (b) Wash the CNW HLB cartridge with 3mL of pure water; (c) Pass 50mL water sample through the CNW HLB column at a speed of 1mL/min; (d) wash the CNW HLB small column again with 3mL of 5% methanol; (e) Elute with 6mL of methanol solution, blow the eluent to 1mL with liquid nitrogen, and store in a refrigerator at 4°C for subsequent on-board testing; (B) The concentration of NSAIDs was detected by liquid chromatography-mass spectrometry.