CN113620405A - Reactor and method for degrading antibiotics by catalyzing persulfate through up-flow packed bed - Google Patents
Reactor and method for degrading antibiotics by catalyzing persulfate through up-flow packed bed Download PDFInfo
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- CN113620405A CN113620405A CN202110922012.XA CN202110922012A CN113620405A CN 113620405 A CN113620405 A CN 113620405A CN 202110922012 A CN202110922012 A CN 202110922012A CN 113620405 A CN113620405 A CN 113620405A
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- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 title claims abstract description 46
- 239000003242 anti bacterial agent Substances 0.000 title claims abstract description 23
- 229940088710 antibiotic agent Drugs 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000000593 degrading effect Effects 0.000 title abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims abstract description 72
- 239000011259 mixed solution Substances 0.000 claims abstract description 53
- 239000003054 catalyst Substances 0.000 claims abstract description 44
- 230000003115 biocidal effect Effects 0.000 claims abstract description 34
- 239000002351 wastewater Substances 0.000 claims abstract description 33
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 230000015556 catabolic process Effects 0.000 claims abstract description 20
- 238000006731 degradation reaction Methods 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 12
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 10
- 239000012494 Quartz wool Substances 0.000 claims description 40
- 239000000243 solution Substances 0.000 claims description 32
- 239000007800 oxidant agent Substances 0.000 claims description 11
- 230000001590 oxidative effect Effects 0.000 claims description 11
- 230000003213 activating effect Effects 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 9
- 229910002567 K2S2O8 Inorganic materials 0.000 claims description 3
- 229910004882 Na2S2O8 Inorganic materials 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 238000006555 catalytic reaction Methods 0.000 claims description 2
- FHHJDRFHHWUPDG-UHFFFAOYSA-L peroxysulfate(2-) Chemical group [O-]OS([O-])(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-L 0.000 claims 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000009303 advanced oxidation process reaction Methods 0.000 abstract description 8
- 238000004065 wastewater treatment Methods 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000005054 agglomeration Methods 0.000 abstract description 2
- 230000002776 aggregation Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 3
- 238000007789 sealing Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 229960005404 sulfamethoxazole Drugs 0.000 description 18
- JLKIGFTWXXRPMT-UHFFFAOYSA-N sulphamethoxazole Chemical compound O1C(C)=CC(NS(=O)(=O)C=2C=CC(N)=CC=2)=N1 JLKIGFTWXXRPMT-UHFFFAOYSA-N 0.000 description 18
- 230000001351 cycling effect Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- FDDDEECHVMSUSB-UHFFFAOYSA-N sulfanilamide Chemical compound NC1=CC=C(S(N)(=O)=O)C=C1 FDDDEECHVMSUSB-UHFFFAOYSA-N 0.000 description 1
- 229940124530 sulfonamide Drugs 0.000 description 1
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Classifications
-
- 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
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
Abstract
The invention discloses a reactor and a method for degrading antibiotics by catalyzing persulfate through an upflow packed bed. The reactor mainly comprises a liquid storage tank, a reaction tube cavity, a peristaltic pump, a stirrer, a sealing cover, a water stop valve and the like; the liquid storage tank is used as a mixing area for mixing the antibiotic wastewater and the persulfate, and the stirrer continuously works to stir the mixed liquid uniformly; then the mixed solution is injected into the reaction tube cavity through a peristaltic pump to realize the degradation of the antibiotics; and the treated antibiotic wastewater flows into the mixing zone and is pumped into the reaction zone again for cyclic degradation, so that continuous and stable treatment of the antibiotic wastewater is realized. The continuous flow reactor is adopted to catalyze persulfate to oxidize and degrade antibiotics, the operation is convenient, the energy consumption is low, the problems of powder catalyst agglomeration, inconvenience in the recovery process, catalyst loss in the recovery process and the like are solved, the problem that continuous and stable operation cannot be carried out in the wastewater treatment of the antibiotics in the batch reactor is solved, and the practical situation of the persulfate advanced oxidation process in the wastewater treatment is accelerated.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to an up-flow packed bed reactor and a method for treating antibiotic wastewater.
Background
At present, a large amount of antibiotics can be detected in underground water systems and soil, and the antibiotics are extremely harmful to ecological systems and human beings. Many treatment processes such as biodegradation, physical and chemical adsorption, and photocatalysis have been applied to antibiotic treatment in water bodies, such that harmful antibiotics are removed from the natural environment or degraded to safe levels. However, in practical applications, cost and processing efficiency are to be further improved. Therefore, there is a need to provide a method for antibiotic wastewater treatment with higher efficiency and lower cost.
Advanced Oxidation Processes (AOPs) have characteristics of high efficiency, convenient operation, etc. as an effective method for treating wastewater, PMS is an effective oxidant for generating active substances in AOPs, and receives more and more attention due to characteristics of no toxicity, high stability, low cost, easy water solubility, etc. However, the practical application of PMS-AOP is limited by treating antibiotic wastewater based on a sulfate-based advanced oxidation (PMS-AOP) process using a batch system at present, and how to achieve continuous stable treatment of antibiotic wastewater becomes a problem that needs to be solved at present. Research has shown that the oxidative degradation of organic pollutants by activating persulfate through catalyst bead spheres in a column reactor shows higher wastewater treatment efficiency. However, the catalyst fixed bed reactor designed by granulating the catalyst has a problem of large amount of the catalyst. In addition, how to fix the powder catalyst in the continuous flow persulfate oxidation process to avoid loss and recycle the powder catalyst still needs to be further explored.
Disclosure of Invention
In view of the above, the invention provides a reactor and a method for degrading antibiotic pollutants by catalyzing persulfate through an upflow packed bed.
The technical scheme of the invention is as follows:
the reactor is a continuous flow reactor.
The utility model provides a reactor of up-flow packed bed catalysis persulfate degradation antibiotic which characterized in that: the reactor comprises a mixing zone (1), a reaction zone (2), a peristaltic pump (3), a stirrer (4), an oxidant inlet (5), a wastewater inlet (6), quartz wool (7), a loaded powder catalyst (8), a reaction zone water inlet pipe (9), a reaction zone water outlet pipe (10) and a water outlet (11).
Be equipped with oxidant entry (5), waste water entry (6), agitating unit (4) and delivery port (11) in the mixed zone to mixed zone (1) is connected with reaction zone (2) through intake peristaltic pump (3), and reaction zone (2) are cylindrical packed column, and full quartz wool (7) are filled in the packed column, and powder catalyst (8) evenly load on the quartz wool, and reaction zone export (10) pass through the silicone tube with the mixed zone and are connected, and whole device forms circulation structure.
The method for applying the reactor comprises the following steps:
(1) introducing a predetermined amount of persulfate and antibiotic wastewater into a mixing zone, and uniformly mixing the solution by using a stirrer to obtain a mixed solution;
(2) mixing a small amount of solution in the mixing zone with a certain amount of RSDBC13, immersing quartz wool in the solution to ensure that the catalyst is uniformly attached to the quartz wool, and filling the quartz wool loaded with RSDBC13 in the reaction zone to form a packed bed;
(3) controlling the mixed solution to flow into the reaction zone at a preset flow rate by a peristaltic pump, and activating persulfate by the catalyst to oxidize and degrade the antibiotics;
(4) and the mixed solution after treatment in the reaction zone enters a mixing zone, and the mixed solution is continuously pumped into the reaction zone by a peristaltic pump for cyclic degradation.
(5) And opening a water stop valve at regular time, and discharging the antibiotic wastewater reaching the standard.
Preferably, the present invention provides that the process using the above reactor further comprises some or all of the following technical features:
in the step (1), the concentration of the antibiotic is 5-25 mg/L; the concentration of the added persulfate is 0.5-5.0 mmol/L, the persulfate is PMS and PDS, and the PMS is KHSO5Or NaHSO5The PDS is Na2S2O8Or K2S2O8。
In the step (2), the concentration of RSDBC13 in the final reaction zone is 0.2-2.0 g/L; the mass of the quartz wool is 5.0-10.0 g.
And (4) pumping the mixed solution into the reaction zone in the step (3) at a flow rate of 0.3-4.5 mL/min.
And (4) the circulation time of the mixed solution in the step (4) is 0-2.5 h.
Based on the technical scheme, compared with the prior art, the reactor for catalyzing persulfate to degrade antibiotic pollutants by using the upflow packed bed has the following beneficial effects:
(1) the invention realizes continuous and stable treatment of antibiotic wastewater by using the upflow packed bed reactor, has convenient operation and low energy consumption, and provides a new trend for persulfate advanced oxidation process in practical application.
(2) The method realizes the fixation and the recycling of the powder catalyst in the packed column by utilizing the upflow packed bed reactor through the quartz cotton carrier, avoids the problems of agglomeration of the powder catalyst, inconvenience in the recovery process, loss of the catalyst in the recovery process and the like, and accelerates the practical application of the persulfate advanced oxidation process in wastewater treatment;
(3) compared with a catalyst fixed bed reactor designed by catalyst granulation, the invention uses less catalyst, and the removal rate of Sulfamethoxazole (SMX) can reach more than 80 percent after the reactor continuously and circularly operates for 1 hour.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
in the figure: 1-a mixing zone; 2-reaction zone, 3-peristaltic pump; 4-a stirrer; 5-an oxidant inlet; 6-wastewater inlet; 7-quartz wool; 8-a supported powder catalyst; 9-water inlet pipe of reaction zone; 10-a reaction zone water outlet pipe; 11-water outlet.
FIG. 2 is a graph comparing SMX removal after 1.0h of reactor cycling for different oxidant concentrations (example one, example two, and example three);
FIG. 3 is a graph comparing SMX removal after 1.0h of reactor cycling at different catalyst concentrations (in example one, example four, and example five).
FIG. 4 is a graph comparing SMX removal after 1.0h of reactor cycling at different flow rates (example one, example six);
Detailed Description
In order that the objects, technical solutions and advantages of the present invention will become more apparent, the present invention will be further described in detail with reference to the accompanying drawings in conjunction with the following specific embodiments.
The reactor disclosed by the invention is shown in figure 1 and comprises a mixing zone (1), a reaction zone (2), a peristaltic pump (3), a stirrer (4), an oxidant inlet (5), a wastewater inlet (6), quartz wool (7), a supported powder catalyst (8), a reaction zone water inlet pipe (9), a reaction zone water outlet pipe (10) and a water outlet (11).
Be equipped with oxidant entry (5), waste water entry (6), agitating unit (4) and delivery port (11) in the mixed zone to mixed zone (1) is connected with reaction zone (2) through intake peristaltic pump (3), and reaction zone (2) are cylindrical packed column, and full quartz wool (7) are filled in the packed column, and powder catalyst (8) evenly load on the quartz wool, and reaction zone export (10) pass through the silicone tube with the mixed zone and are connected, and whole device forms circulation structure.
The reactor is a continuous flow reactor.
The method for applying the device comprises the following steps:
(1) introducing a predetermined amount of persulfate and antibiotic wastewater into a mixing zone, and uniformly mixing the solution by using a stirrer to obtain a mixed solution;
(2) mixing a small amount of solution in the mixing zone with a certain amount of RSDBC13, immersing quartz wool in the solution to ensure that the catalyst is uniformly attached to the quartz wool, and filling the quartz wool loaded with RSDBC13 in the reaction zone to form a packed bed;
(3) controlling the mixed solution to flow into the reaction zone at a preset flow rate by a peristaltic pump, and activating persulfate by the catalyst to oxidize and degrade the antibiotics;
(4) and the mixed solution after treatment in the reaction zone enters a mixing zone, and the mixed solution is continuously pumped into the reaction zone by a peristaltic pump for cyclic degradation.
(5) And opening a water stop valve at regular time, and discharging the antibiotic wastewater reaching the standard.
In some embodiments of the invention, the concentration of the antibiotic is 5-25 mg/L, such as 5mg/L, 10mg/L, 12mg/L, 18mg/L, 15mg/L, 20mg/L, 25 mg/L.
In some embodiments of the invention, the persulfate has a concentration of 0.5 to 5.0mmol/L, e.g., 0.5mmol/L, 1.0mmol/L, 1.5mmol/L, 2.0mmol/L, 2.3mmol/L, 3.0mmol/L, 3.5mmol/L, 4.0mmol/L, 4.5mmol/L, 5.0 mmol/L.
In some embodiments of the invention, the persulfate is PMS and per-PDS, and the PMS is KHSO5Or NaHSO5The PDS is Na2S2O8Or K2S2O8。
In some embodiments of the invention, the concentration of RSDBC13 in the final reaction zone is 0.2-2.0 g/L, such as 0.2g/L, 0.5g/L, 0.8g/L, 1.0g/L, 1.2g/L, 1.5g/L, 1.8g/L, 2.0 g/L.
In some embodiments of the invention, the mass of the quartz wool in the packed column is 5.0 to 10.0g, such as 5.0g, 6.0g, 7.0g, 8.0g, 9.0g, 10.0 g.
In some embodiments of the invention, the flow rate of the mixed contaminant solution pumped into the reaction zone is 0.3 to 4.5mL/min, such as 0.3mL/min, 0.5mL/min, 0.8mL/min, 1.1mL/min, 1.5mL/min, 2.0mL/min, 2.6mL/min, 3.0mL/min, 3.6mL/min, 4.5 mL/min.
In some embodiments of the present invention, the circulation time of the mixed pollutant solution is 0.0-2.5 h, such as 0.5h, 1.0h, 1.5h, 2.5 h.
The technical solution of the present invention is further illustrated by the following specific embodiments in conjunction with the accompanying drawings. It should be noted that the following specific examples are given by way of illustration only and the scope of the present invention is not limited thereto. The chemicals and raw materials used in the following examples were either commercially available or self-prepared by a known preparation method.
Example 1
(1) Introducing a predetermined amount of persulfate and antibiotic wastewater into a mixing zone, and uniformly mixing the solution by using a stirrer to obtain a mixed solution, wherein the concentration of SMX in the mixed solution is 15mg/L, and the concentration of PMS in the mixed solution is 1.5 mM;
(2) mixing a small amount of solution in the mixing zone with 50mg of RSDBC13, immersing 7.0g of quartz wool in the solution to enable the catalyst to be uniformly attached to the quartz wool, filling the quartz wool loaded with RSDBC13 in the reaction zone to form a packed bed, and finally enabling the concentration of the catalyst in the reaction zone to be 0.5 g/L;
(3) controlling the mixed solution to flow into the reaction zone at the flow rate of 3.6mL/min by a peristaltic pump, and activating persulfate by the RSDBC13 to oxidize and degrade the antibiotics;
(4) and the mixed solution treated in the reaction zone enters a mixing zone, and the mixed solution is continuously pumped into the reaction zone by a peristaltic pump at the flow rate of 3.6mL/min for cyclic degradation.
(5) And opening a water stop valve at regular time, and discharging the antibiotic wastewater reaching the standard.
Example 2
(1) Introducing a predetermined amount of persulfate and antibiotic wastewater into a mixing zone, and uniformly mixing the solution by using a stirrer to obtain a mixed solution, wherein the concentration of SMX in the mixed solution is 15mg/L, and the concentration of PMS in the mixed solution is 2.3 mM;
(2) mixing a small amount of solution in the mixing zone with 50mg of RSDBC13, immersing 7.0g of quartz wool in the solution to enable the catalyst to be uniformly attached to the quartz wool, filling the quartz wool loaded with RSDBC13 in the reaction zone to form a packed bed, and finally enabling the concentration of the catalyst in the reaction zone to be 0.5 g/L;
(3) controlling the mixed solution to flow into the reaction zone at the flow rate of 3.6mL/min by a peristaltic pump, and activating persulfate by the RSDBC13 to oxidize and degrade the antibiotics;
(4) and the mixed solution treated in the reaction zone enters a mixing zone, and the mixed solution is continuously pumped into the reaction zone by a peristaltic pump at the flow rate of 3.6mL/min for cyclic degradation.
(5) And opening a water stop valve at regular time, and discharging the antibiotic wastewater reaching the standard.
Example 3
(1) Introducing a predetermined amount of persulfate and antibiotic wastewater into a mixing zone, and uniformly mixing the solution by using a stirrer to obtain a mixed solution, wherein the concentration of SMX in the mixed solution is 15mg/L, and the concentration of PMS in the mixed solution is 3.0 mM;
(2) mixing a small amount of solution in the mixing zone with 50mg of RSDBC13, immersing 7.0g of quartz wool in the solution to enable the catalyst to be uniformly attached to the quartz wool, filling the quartz wool loaded with RSDBC13 in the reaction zone to form a packed bed, and finally enabling the concentration of the catalyst in the reaction zone to be 0.5 g/L;
(3) controlling the mixed solution to flow into the reaction zone at the flow rate of 3.6mL/min by a peristaltic pump, and activating persulfate by the RSDBC13 to oxidize and degrade the antibiotics;
(4) and the mixed solution treated in the reaction zone enters a mixing zone, and the mixed solution is continuously pumped into the reaction zone by a peristaltic pump at the flow rate of 3.6mL/min for cyclic degradation.
(5) And opening a water stop valve at regular time, and discharging the antibiotic wastewater reaching the standard.
FIG. 2 is a graph comparing SMX removal after 1.0h of reactor cycling at different oxidant concentrations in example one, example two, and example three, where SMX removal increased from 75.92% to 96.75% as the oxidant concentration increased from 1.5mM to 3.0 mM.
Example 4
(1) Introducing a predetermined amount of persulfate and antibiotic wastewater into a mixing zone, and uniformly mixing the solution by using a stirrer to obtain a mixed solution, wherein the concentration of SMX in the mixed solution is 15mg/L, and the concentration of PMS in the mixed solution is 1.5 mM;
(2) mixing a small amount of solution in the mixing zone with 100mg of RSDBC13, immersing 7.0g of quartz wool in the solution to enable the catalyst to be uniformly attached to the quartz wool, filling the quartz wool loaded with RSDBC13 in the reaction zone to form a packed bed, and finally enabling the concentration of the catalyst in the reaction zone to be 1.0 g/L;
(3) controlling the mixed solution to flow into the reaction zone at the flow rate of 3.6mL/min by a peristaltic pump, and activating persulfate by the RSDBC13 to oxidize and degrade the antibiotics;
(4) and the mixed solution treated in the reaction zone enters a mixing zone, and the mixed solution is continuously pumped into the reaction zone by a peristaltic pump at the flow rate of 3.6mL/min for cyclic degradation.
(5) And opening a water stop valve at regular time, and discharging the antibiotic wastewater reaching the standard.
Example 5
(1) Introducing a predetermined amount of persulfate and antibiotic wastewater into a mixing zone, and uniformly mixing the solution by using a stirrer to obtain a mixed solution, wherein the concentration of SMX in the mixed solution is 15mg/L, and the concentration of PMS in the mixed solution is 1.5 mM;
(2) mixing a small amount of the solution in the mixing zone with 150mg of RSDBC13, immersing 7.0g of quartz wool in the solution to enable the catalyst to be uniformly attached to the quartz wool, filling the quartz wool loaded with RSDBC13 in the reaction zone to form a packed bed, and finally enabling the concentration of the catalyst in the reaction zone to be 1.5 g/L;
(3) controlling the mixed solution to flow into the reaction zone at the flow rate of 3.6mL/min by a peristaltic pump, and activating persulfate by the RSDBC13 to oxidize and degrade the antibiotics;
(4) and the mixed solution treated in the reaction zone enters a mixing zone, and the mixed solution is continuously pumped into the reaction zone by a peristaltic pump at the flow rate of 3.6mL/min for cyclic degradation.
(5) And opening a water stop valve at regular time, and discharging the antibiotic wastewater reaching the standard.
FIG. 3 is a graph comparing SMX removal after 1.0h of reactor cycling at different catalyst concentrations in example one, example four, and example five, with SMX removal increasing from 75.92% to 85.24% as the catalyst concentration increases from 0.5g/L to 1.5 g/L.
Example 6
(1) Introducing a predetermined amount of persulfate and antibiotic wastewater into a mixing zone, and uniformly mixing the solution by using a stirrer to obtain a mixed solution, wherein the concentration of SMX in the mixed solution is 15mg/L, and the concentration of PMS in the mixed solution is 1.5 mM;
(2) mixing a small amount of solution in the mixing zone with 50mg of RSDBC13, immersing 7.0g of quartz wool in the solution to enable the catalyst to be uniformly attached to the quartz wool, filling the quartz wool loaded with RSDBC13 in the reaction zone to form a packed bed, and finally enabling the concentration of the catalyst in the reaction zone to be 0.5 g/L;
(3) controlling the mixed solution to flow into the reaction zone at a flow rate of 1.1mL/min by a peristaltic pump, and activating persulfate by RSDBC13 to oxidize and degrade antibiotics;
(4) and the mixed solution treated in the reaction zone enters a mixing zone, and the mixed solution is continuously pumped into the reaction zone by a peristaltic pump at the flow rate of 1.1mL/min for cyclic degradation.
(5) And opening a water stop valve at regular time, and discharging the antibiotic wastewater reaching the standard.
FIG. 4 is a graph comparing SMX removal after 1.0h of reactor cycling at different flow rates in example one and example six, and when the flow rate was increased from 1.1mL/min to 3.6mL/min, the SMX removal increased from 69.66% to 75.92%, indicating that the flow rate had less of an effect on sulfanilamide degradation in the reactor.
In summary, PMS concentration had the greatest effect on SMX degradation in the reactor, catalyst concentration was the second, and flow rate was the least.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a reactor of up-flow packed bed catalysis persulfate degradation antibiotic which characterized in that: the reactor comprises a mixing zone (1), a reaction zone (2), a peristaltic pump (3), a stirrer (4), an oxidant inlet (5), a wastewater inlet (6), quartz wool (7), a loaded powder catalyst (8), a reaction zone water inlet pipe (9), a reaction zone water outlet pipe (10) and a water outlet (11).
Be equipped with oxidant entry (5), waste water entry (6), agitating unit (4) and delivery port (11) in the mixed zone to mixed zone (1) is connected with reaction zone (2) through intake peristaltic pump (3), and reaction zone (2) are cylindrical packed column, and full quartz wool (7) are filled in the packed column, and powder catalyst (8) evenly load on the quartz wool, and reaction zone export (10) pass through the silicone tube with the mixed zone and are connected, and whole device forms circulation structure.
2. A method for using the reactor of claim 1 for catalyzing the degradation of antibiotics by persulfate salts, comprising the following steps:
(1) introducing a predetermined amount of persulfate and antibiotic wastewater into a mixing zone, and uniformly mixing the solution by using a stirrer to obtain a mixed solution;
(2) mixing a small amount of solution in a mixing zone with a quantitative sludge-red mud compound biochar catalyst (RSDBC13), immersing quartz wool in the solution to enable the catalyst to be uniformly attached to the quartz wool, and filling the quartz wool loaded with RSDBC13 in a reaction zone to form a packed bed;
(3) controlling the mixed solution to flow into the reaction zone at a preset flow rate by a peristaltic pump, and activating persulfate by the catalyst to oxidize and degrade the antibiotics;
(4) and the mixed solution after treatment in the reaction zone enters a mixing zone, and the mixed solution is continuously pumped into the reaction zone by a peristaltic pump for cyclic degradation.
(5) And opening a water stop valve at regular time, and discharging the antibiotic wastewater reaching the standard.
3. The method for using the reactor for catalyzing persulfate degradation of antibiotics by using the upflow packed bed as recited in claim 1, wherein:
in the step (1), the step (c),
the concentration of the antibiotic is 5-25 mg/L;
the concentration of the added persulfate is 0.5-5.0 mmol/L, the persulfate is Peroxymonosulfate (PMS) and Peroxydisulfate (PDS), and the PMS isKHSO5Or NaHSO5The PDS is Na2S2O8Or K2S2O8。
4. The method for using the reactor for catalyzing persulfate degradation of antibiotics by using the upflow packed bed as recited in claim 1, wherein:
in the step (2), the step (c),
the concentration of RSDBC13 in the final reaction zone is 0.2-2.0 g/L;
the mass of the quartz wool is 5.0-10.0 g.
5. The method for using the reactor for catalyzing persulfate degradation of antibiotics by using the upflow packed bed as recited in claim 2, wherein:
the flow rate of the mixed solution injected into the reaction zone in the step (3) is 0.3-4.5 mL/min.
6. The method for using the reactor for catalyzing persulfate degradation of antibiotics by using the upflow packed bed as recited in claim 2, wherein:
and (4) circulating the mixed solution for 0-2.5 h.
Priority Applications (1)
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