CN111233225B - UV-FENTON wastewater treatment process - Google Patents
UV-FENTON wastewater treatment process Download PDFInfo
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- CN111233225B CN111233225B CN202010048694.1A CN202010048694A CN111233225B CN 111233225 B CN111233225 B CN 111233225B CN 202010048694 A CN202010048694 A CN 202010048694A CN 111233225 B CN111233225 B CN 111233225B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 115
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 106
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- 238000004062 sedimentation Methods 0.000 claims abstract description 57
- 229910052742 iron Inorganic materials 0.000 claims abstract description 48
- 239000000706 filtrate Substances 0.000 claims abstract description 46
- 239000006228 supernatant Substances 0.000 claims abstract description 46
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- 230000015271 coagulation Effects 0.000 claims abstract description 44
- 238000005345 coagulation Methods 0.000 claims abstract description 44
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- 150000001875 compounds Chemical class 0.000 claims description 15
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- 239000001257 hydrogen Chemical group 0.000 description 1
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- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
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- 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
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- 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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The invention relates to a UV-FENTON wastewater treatment process, which specifically comprises the following steps: s1, organic wastewater enters an intermediate tank, and H is added into the intermediate tank2SO4Adjusting the pH value of the wastewater by using the solution, and feeding the organic wastewater into a Fenton reaction tank; s2, adding H into the Fenton reaction tank2O2Solution and iron-coated microspheres, and UV light irradiation is added to fully react and decompose organic matters; s3, enabling the effluent of the Fenton reaction tank to enter a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adjusting the pH value of the wastewater to 7.5-8.5; s4, enabling effluent of the degassing neutralization tank to enter a coagulation tank, adding a flocculating agent and a coagulant aid, and stirring to form a flocculating body; s5, enabling the effluent of the coagulation tank to enter a sedimentation tank, recovering a flocculating constituent to a sludge treatment system for treatment, and enabling supernatant effluent to enter a super filter; s6, filtering the supernatant by adopting a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with a flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate. The invention is beneficial to improving the treatment effect of the organic wastewater.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a UV-FENTON wastewater treatment process.
Background
The treatment of organic wastewater difficult to degrade is a well-recognized problem in the sewage treatment world at home and abroad at present. For the wastewater, at present, industrial wastewater such as coking wastewater, pharmaceutical wastewater, petrochemical oily wastewater, textile and printing and dyeing wastewater, chemical wastewater, paint wastewater and the like are researched more at home and abroad. By "refractory" is meant that such waste water is of low biodegradability, i.e. generally having a BOD5/COD value below 0.3 or even lower, and is difficult to biodegrade. Therefore, the organic wastewater with BOD5/COD value lower than 0.3 is commonly called as refractory organic wastewater in the industry.
The reason why the hardly degradable organic waste water is difficult to be biologically treated is essentially determined by its characteristics. Generally, such waste water has the following common characteristics in terms of water quality, water quantity and the like: (1) the variety of the difficultly biodegradable substances in the organic matters is high; (2) besides organic matters, the salt concentration of the wastewater is higher; (3) the wastewater treatment method itself has a great problem.
The biochemical method is generally adopted to treat the organic wastewater in the market, and the traditional biochemical method is A/O (anaerobic/aerobic) and A2O (anoxic/anaerobic/aerobic) or A2/O2(anoxic/anaerobic/aerobic/contact oxidation) and the like. Because the organic wastewater treated by only adopting the biochemical method generally has the problem that the discharge index does not meet the standard, the Fenton method is gradually added after the biochemical method for carrying out advanced treatment on the organic wastewater in the process of development and progress of the wastewater treatment technology, and the principle of the Fenton method is as follows: introducing the organic wastewater into a Fenton reaction tank, and adding a Fenton reagent, which generally comprises H, into the Fenton reaction tank2O2Solution and Fe2+Solution of H2O2The solution has strong oxidizing property with Fe2+The solution reacts to generate hydroxyl free radicals and Fe2+Oxidation to Fe3+Hydroxyl radical has high electronegativity or electrophilicity and strong addition reaction property, and can be used for preparing many known organic compounds such as carboxylic acid and alcoholAnd the esters are oxidized into inorganic state, thereby improving the removal efficiency of the organic pollutants difficult to degrade.
Because the organic wastewater mainly contains a large amount of cyclic or long-chain macromolecular organic matters, the molecular structure is relatively stable, the organic wastewater is not easily and directly degraded biochemically, and the organic wastewater contains certain toxicity. Therefore, the biochemical method and the fenton method are not necessarily capable of achieving ideal treatment effect, and how to improve the treatment effect of the organic wastewater so that the organic wastewater reaches the specified discharge standard is a problem to be solved urgently in the field of wastewater treatment.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a UV-FENTON wastewater treatment process, which can achieve the specified discharge standard by improving the organic wastewater treatment effect.
The above object of the present invention is achieved by the following technical solutions:
a UV-FENTON wastewater treatment process specifically comprises the following steps:
s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: adding H into the Fenton reaction tank through a dosing system2O2Solution and iron-coated microspheres, H2O2With Fe2+In a molar ratio of (3-5): 1, turning on a UV lamp, and increasing UV light irradiation to enable organic matters to fully react and decompose in a Fenton reaction tank, wherein the retention time of organic wastewater in the Fenton reaction tank is 0.5-1.2 h;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding a pH regulator to regulate the pH value of the wastewater to 7.5-8.5;
s4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, 1-3 ppm of flocculant and 0.5-1.5 ppm of coagulant aid are added through a dosing system, and a flocculating constituent is formed by stirring;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
By adopting the technical scheme, the Fenton reaction tank is irradiated by the UV lamp, and certain hydroxyl complex compounds of iron can perform a photosensitization reaction to generate OH, ultraviolet light and Fe2+To H2O2The catalytic decomposition of the organic compound has a synergistic effect, so that the efficiency of the oxidative decomposition of the organic compound is improved; part of organic matters can be degraded under the action of ultraviolet rays without oxidation of OH, so that the oxidative decomposition efficiency of the organic matters is further improved, and H is saved2O2The amount of solution and iron-coated microspheres used.
The present invention in a preferred example may be further configured to: the surface of the iron-coated microsphere is fully coated with FeSO4And the reducing agent is embedded in the iron-coated microspheres.
By adopting the technical scheme, the surfaces of the microspheres are fully coated with FeSO4Powder, FeSO4Powder dissolved in organic waste water, Fe2+And H2O2OH is formed by the reaction, and OH oxidizes and decomposes organic substances, since Fe is generated in the process of the Fenton reaction2+The consumption of the iron-coated microspheres is large, the production cost is high, a reducing agent is embedded in the iron-coated microspheres, and after the microspheres are dissolved, the reducing agent can be used for partially embedding Fe in the organic wastewater3+Reduction to Fe2+Thereby realizing Fe2+Cyclic utilization and Fe reduction2+The consumption of the method reduces the production cost; the remainder of Fe3+Then under the irradiation of UV lamp with Fe2+The system balance is kept, thereby ensuring the oxidative decomposition efficiency of the organic matters.
The present invention in a preferred example may be further configured to: the reducing agent is copper powder.
By adopting the technical scheme, the gold of the copper is adoptedCopper powder is selected as a reducing agent after iron in the activity sequence, so that the phenomenon that copper converts Fe into Fe is avoided2+Further reducing the copper powder into iron simple substance, and controlling the copper powder to Fe due to the small content of the copper powder in the iron-coated microspheres3+The reduction amount of (2) avoids influencing the system balance;
since copper powder is oxidized to Cu2+，Cu2+The copper powder has a catalytic effect of promoting the Fenton reaction process in the system, so the copper powder also has the effects of improving the Fenton reaction efficiency and promoting the decomposition of organic matters.
The present invention in a preferred example may be further configured to: the iron-coated microspheres are made of lipid compounds.
By adopting the technical scheme, the organic wastewater also contains lipoid compounds which can be decomposed under the oxidation of OH, and the lipoid compounds are selected as the preparation materials of the iron-coated microspheres, so that on one hand, the dissolving effect of the iron-coated microspheres is improved, the copper powder is completely exposed in the organic wastewater, and the Fe can be ensured3+The reducing effect of (2); on the other hand, the difficulty of organic wastewater treatment caused by the introduction of new impurities is avoided.
The present invention in a preferred example may be further configured to: the pH value of the S1 is 3-3.5.
By adopting the technical scheme, the pH value in the Fenton reaction system has great influence on the reaction, and when the pH value is too high, OH is limited, ferric hydroxide precipitation can occur, and the catalytic capability is lost; when the pH value is too low, Fe3+Cannot be reduced to Fe2+The catalytic reaction is hindered, the reaction rate is slowed down, and the organic matter oxidative decomposition efficiency is reduced; therefore, strict control of the pH is required.
The present invention in a preferred example may be further configured to: the pH regulator in S3 is sodium hydroxide solution or calcium hydroxide solution.
The present invention in a preferred example may be further configured to: the flocculant is polyacrylamide.
By adopting the technical scheme, because the polyacrylamide structural unit contains the acylamino, hydrogen bonds are easy to form, and various modified substances with branched chains or net structures are easy to obtain through grafting or crosslinking, so that the polyacrylamide has good water solubility, chemical activity and flocculation property, and the frictional resistance between liquids can be reduced, therefore, the polyacrylamide is selected as the flocculating agent.
The present invention in a preferred example may be further configured to: the coagulant aid is activated silicic acid.
By adopting the technical scheme, the activated silicic acid is used for improving the structure of the flocculating constituent, and the strong adsorption and bridging effects of the activated silicic acid are utilized to enable the fine and loose flocculating constituent to become coarse and compact, and the fine and loose flocculating constituent is compounded with polyacrylamide for use, and the fine and loose flocculating constituent and the polyacrylamide are cooperated to enable solid suspended matters gathered in water to settle rapidly, so that a better flocculation effect is achieved.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the Fenton reaction cell is irradiated by UV lamp, and some hydroxyl complexes of iron can generate photosensitization reaction to generate OH, ultraviolet light and Fe2+To H2O2The catalytic decomposition of the organic compound has a synergistic effect, so that the efficiency of the oxidative decomposition of the organic compound is improved; part of organic matters can be degraded under the action of ultraviolet rays without oxidation of OH, so that the oxidative decomposition efficiency of the organic matters is further improved, and H is saved2O2The usage amount of the solution and the iron-coated microspheres;
2. embedding a reducing agent in the iron-coated microspheres, and after the microspheres are dissolved, the reducing agent can partially remove Fe in the organic wastewater3+Reduction to Fe2+Thereby realizing Fe2+Cyclic utilization and Fe reduction2+The consumption of the method reduces the production cost; the remainder of Fe3+Then under the irradiation of UV lamp with Fe2+The system balance is kept, so that the oxidative decomposition efficiency of the organic matters is ensured;
3. because the metal activity of copper is in sequence behind that of iron, copper powder is selected as a reducing agent, and the phenomenon that the copper makes Fe2+Further reducing the copper powder into iron simple substance, and controlling the copper powder to Fe due to the small content of the copper powder in the iron-coated microspheres3+The reduction amount of (2) avoids influencing the system balance;
4. the lipoid compound is selected as the preparation material of the iron-coated microspheres, so that on one hand, the dissolving effect of the iron-coated microspheres is improved, and the copper powder is completely exposed in the organic wastewater, thereby ensuring that the copper powder can react with Fe3+The reducing effect of (2); on the other hand, the difficulty of organic wastewater treatment caused by the introduction of new impurities is avoided.
Drawings
FIG. 1 is a schematic flow diagram of a wastewater treatment process.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Embodiment 1 is a UV-FENTON wastewater treatment process disclosed by the invention, which specifically comprises the following steps: s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater to 3.2 by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: adding H into the Fenton reaction tank through a dosing system2O2Solution and iron-coated microspheres, H2O2With Fe2+In a molar ratio of 4: 1, turning on a UV lamp, and increasing UV light irradiation to enable organic matters to fully react and decompose in a Fenton reaction tank, wherein the retention time of organic wastewater in the Fenton reaction tank is 1 h; the iron-coated microsphere is prepared from lipoid compound and coated with FeSO4Powder, copper powder is embedded inside the powder;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding sodium hydroxide solution, and adjusting the pH value of the wastewater to 8;
s4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, 2ppm polyacrylamide and 1ppm activated silicic acid are added through a dosing system, and a flocculating constituent is formed through stirring;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
Embodiment 2 discloses a UV-FENTON wastewater treatment process, which specifically comprises the following steps: s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater to 3.2 by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: adding H into the Fenton reaction tank through a dosing system2O2Solution and iron-coated microspheres, H2O2With Fe2+In a molar ratio of 3: 1, turning on a UV lamp, and increasing UV light irradiation to enable organic matters to fully react and decompose in a Fenton reaction tank, wherein the retention time of organic wastewater in the Fenton reaction tank is 1 h; the iron-coated microsphere is prepared from lipoid compound and coated with FeSO4Powder, copper powder is embedded inside the powder;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding sodium hydroxide solution, and adjusting the pH value of the wastewater to 8;
s4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, 2ppm polyacrylamide and 1ppm activated silicic acid are added through a dosing system, and a flocculating constituent is formed through stirring;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
Embodiment 3 is a UV-FENTON wastewater treatment process disclosed by the present invention, which specifically comprises the following steps:
s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater to 3.2 by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: adding H into the Fenton reaction tank through a dosing system2O2Solution and iron-coated microspheres, H2O2With Fe2+In a molar ratio of 5: 1, turning on a UV lamp, and increasing UV light irradiation to enable organic matters to fully react and decompose in a Fenton reaction tank, wherein the retention time of organic wastewater in the Fenton reaction tank is 1 h; the iron-coated microsphere is prepared from lipoid compound and coated with FeSO4Powder, copper powder is embedded inside the powder;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding sodium hydroxide solution, and adjusting the pH value of the wastewater to 8;
s4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, 2ppm polyacrylamide and 1ppm activated silicic acid are added through a dosing system, and a flocculating constituent is formed through stirring;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
Embodiment 4 is a UV-FENTON wastewater treatment process disclosed by the present invention, which specifically comprises the following steps:
s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater to 3 by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: is inverted to Fenton by a dosing systemAdding H into the reaction tank2O2Solution and iron-coated microspheres, H2O2With Fe2+In a molar ratio of 4: 1, turning on a UV lamp, and increasing UV light irradiation to enable organic matters to fully react and decompose in a Fenton reaction tank, wherein the retention time of organic wastewater in the Fenton reaction tank is 1 h; the iron-coated microsphere is prepared from lipoid compound and coated with FeSO4Powder, copper powder is embedded inside the powder;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding sodium hydroxide solution, and adjusting the pH value of the wastewater to 8;
s4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, 2ppm polyacrylamide and 1ppm activated silicic acid are added through a dosing system, and a flocculating constituent is formed through stirring;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
Embodiment 5 is a UV-FENTON wastewater treatment process disclosed by the present invention, which specifically comprises the following steps:
s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater to 3.5 by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: adding H into the Fenton reaction tank through a dosing system2O2Solution and iron-coated microspheres, H2O2With Fe2+In a molar ratio of 4: 1, turning on a UV lamp, and increasing UV light irradiation to enable organic matters to fully react and decompose in a Fenton reaction tank, wherein the retention time of organic wastewater in the Fenton reaction tank is 1 h; the iron-coated microspheres are made of lipid compoundsCovered with FeSO4Powder, copper powder is embedded inside the powder;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding sodium hydroxide solution, and adjusting the pH value of the wastewater to 8;
s4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, 2ppm polyacrylamide and 1ppm activated silicic acid are added through a dosing system, and a flocculating constituent is formed through stirring;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
Embodiment 6 is a UV-FENTON wastewater treatment process disclosed by the present invention, which specifically comprises the following steps:
s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater to 3.2 by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: adding H into the Fenton reaction tank through a dosing system2O2Solution and iron-coated microspheres, H2O2With Fe2+In a molar ratio of 4: 1, turning on a UV lamp, and increasing UV light irradiation to enable organic matters to fully react and decompose in a Fenton reaction tank, wherein the retention time of organic wastewater in the Fenton reaction tank is 1 h; the iron-coated microsphere is prepared from lipoid compound and coated with FeSO4Powder, copper powder is embedded inside the powder;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding a calcium hydroxide solution, and adjusting the pH value of the wastewater to 8;
s4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, 2ppm polyacrylamide and 1ppm activated silicic acid are added through a dosing system, and a flocculating constituent is formed through stirring;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
Comparative example 1, the UV-FENTON wastewater treatment process disclosed by the invention specifically comprises the following steps:
s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater to 3.2 by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: adding H into the Fenton reaction tank through a dosing system2O2Solution and iron-coated microspheres, H2O2With Fe2+In a molar ratio of 4: 1, fully reacting and decomposing organic matters in a Fenton reaction tank, and keeping the organic wastewater in the Fenton reaction tank for 1 h; the iron-coated microsphere is prepared from lipoid compound and coated with FeSO4Powder, copper powder is embedded inside the powder;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding sodium hydroxide solution, and adjusting the pH value of the wastewater to 8;
s4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, 2ppm polyacrylamide and 1ppm activated silicic acid are added through a dosing system, and a flocculating constituent is formed through stirring;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
Comparative example 2, the UV-FENTON wastewater treatment process disclosed by the invention specifically comprises the following steps:
s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater to 3.2 by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: adding H into the Fenton reaction tank through a dosing system2O2Solution and FeSO4Solution of H2O2With Fe2+In a molar ratio of 4: 1, turning on a UV lamp, and increasing UV light irradiation to enable organic matters to fully react and decompose in a Fenton reaction tank, wherein the retention time of organic wastewater in the Fenton reaction tank is 1 h;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding sodium hydroxide solution, and adjusting the pH value of the wastewater to 8;
s4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, 2ppm polyacrylamide and 1ppm activated silicic acid are added through a dosing system, and a flocculating constituent is formed through stirring;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
Comparative example 3, for the UV-FENTON wastewater treatment process disclosed by the invention, the process specifically comprises the following steps:
s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater to 3.2 by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: adding H into the Fenton reaction tank through a dosing system2O2Solution and iron-coated microspheres, H2O2With Fe2+In a molar ratio of 4: 1, turning on a UV lamp, and increasing UV light irradiation to enable organic matters to fully react and decompose in a Fenton reaction tank, wherein the retention time of organic wastewater in the Fenton reaction tank is 1 h; the iron-coated microsphere is prepared from lipoid compound and coated with FeSO4Powder, wherein zinc powder is embedded inside the powder;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding sodium hydroxide solution, and adjusting the pH value of the wastewater to 8;
s4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, 2ppm polyacrylamide and 1ppm activated silicic acid are added through a dosing system, and a flocculating constituent is formed through stirring;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
Comparative example 4, for the UV-FENTON wastewater treatment process disclosed by the invention, the process specifically comprises the following steps:
s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater to 3.2 by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: through a dosing system to a Fenton reaction tankAddition of H2O2Solution and iron-coated microspheres, H2O2With Fe2+In a molar ratio of 4: 1, turning on a UV lamp, and increasing UV light irradiation to enable organic matters to fully react and decompose in a Fenton reaction tank, wherein the retention time of organic wastewater in the Fenton reaction tank is 1 h; the iron-coated microsphere is prepared from lipoid compound and coated with FeSO4Powder, in which silver powder is embedded;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding sodium hydroxide solution, and adjusting the pH value of the wastewater to 8;
s4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, 2ppm polyacrylamide and 1ppm activated silicic acid are added through a dosing system, and a flocculating constituent is formed through stirring;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
Comparative example 5, for the UV-FENTON wastewater treatment process disclosed by the invention, the process specifically comprises the following steps:
s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater to 3.8 by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: adding H into the Fenton reaction tank through a dosing system2O2Solution and iron-coated microspheres, H2O2With Fe2+In a molar ratio of 4: 1, turning on a UV lamp, and increasing UV light irradiation to enable organic matters to fully react and decompose in a Fenton reaction tank, wherein the retention time of organic wastewater in the Fenton reaction tank is 1 h; the iron-coated microsphere is prepared from lipoid compound and is coated withFeSO4Powder, copper powder is embedded inside the powder;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding sodium hydroxide solution, and adjusting the pH value of the wastewater to 8;
s4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, 2ppm polyacrylamide and 1ppm activated silicic acid are added through a dosing system, and a flocculating constituent is formed through stirring;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
Comparative example 6, the UV-FENTON wastewater treatment process disclosed by the invention specifically comprises the following steps:
s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater to 2.6 by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: adding H into the Fenton reaction tank through a dosing system2O2Solution and iron-coated microspheres, H2O2With Fe2+In a molar ratio of 4: 1, turning on a UV lamp, and increasing UV light irradiation to enable organic matters to fully react and decompose in a Fenton reaction tank, wherein the retention time of organic wastewater in the Fenton reaction tank is 1 h; the iron-coated microsphere is prepared from lipoid compound and coated with FeSO4Powder, copper powder is embedded inside the powder;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding sodium hydroxide solution, and adjusting the pH value of the wastewater to 8;
s4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, 2ppm polyacrylamide and 1ppm activated silicic acid are added through a dosing system, and a flocculating constituent is formed through stirring;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
Performance test
The following performance test tests were performed on the filtrates discharged from the organic waste waters treated by the treatment processes of examples 1 to 6 and comparative examples 1 to 6, respectively, and the test results are reported in table 1.
And (3) pH measurement: detecting with reference to GB/T6920-1986 glass electrode method for measuring pH value of water;
COD removal rate: detecting COD before and after wastewater treatment by referring to HJ828-2017 bichromate method for determining chemical oxygen demand of water quality, wherein the removal rate of the COD is (COD before treatment-COD after treatment)/COD before treatment;
chemical oxygen demand: detecting according to HJ828-2017 bichromate method for determining chemical oxygen demand of water quality;
suspended matters: the detection is carried out according to GB11901-1989 gravimetric method for measuring suspended matters in water;
ammonia nitrogen: and detecting according to HJ535-2009 Nanshi reagent spectrophotometry for measuring ammonia nitrogen in water.
TABLE 1 Performance test data for samples
According to the various performance test data in table 1, it can be seen that: by adopting the wastewater treatment process, the removal rate of COD of the organic wastewater reaches over 86 percent, while the removal rate of COD in the comparative example 1 is only 75.1 percent, which shows that the effect of treating the organic wastewater by adopting the wastewater treatment process of the invention is better.
According to the various performance test data in table 1, it can be seen that: replacement of FeSO by iron-coated microspheres4Solution, is favorable for realizing Fe2+The cyclic utilization of the organic matters improves the decomposition efficiency of the organic matters, thereby improving the removal rate of COD in the supernatant and reducing the content of suspended matters, the content of ammonia nitrogen and the chemical oxygen demand in the supernatant.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (5)
1. A UV-FENTON wastewater treatment process specifically comprises the following steps:
s1, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Adjusting the pH value of the wastewater by using the solution, and then feeding the organic wastewater into a Fenton reaction tank through a water inlet pump;
s2, a Fenton reaction tank: adding H into the Fenton reaction tank through a dosing system2O2The solution and the iron-coated microspheres are prepared from lipoid compounds, and the surfaces of the iron-coated microspheres are fully coated with FeSO4Powder, wherein a reducing agent is embedded in the iron-coated microspheres, the reducing agent is copper powder, and H2O2With Fe2+In a molar ratio of (3-5): 1, turning on a UV lamp, and increasing UV light irradiation to enable organic matters to fully react and decompose in a Fenton reaction tank, wherein the retention time of organic wastewater in the Fenton reaction tank is 0.5-1.2 h;
s3, degassing and neutralizing a pool: turning off the UV lamp, introducing the effluent of the Fenton reaction tank into a degassing neutralization tank, and removing O generated by the Fenton reaction through stirring2Adding pH regulator to regulate the pH value of the wastewater to 7.5-8.5；
S4, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, and a flocculating agent and a coagulant aid are added through a dosing system and stirred to form a flocculating constituent;
s5, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, flocculating constituents are settled at the lower part of the sedimentation tank and form a clear boundary with the supernatant at the upper part of the sedimentation tank, the flocculating constituents are recycled to a sludge treatment system for treatment, and the effluent of the supernatant enters a super filter;
s6, ultrafiltration tank: and filtering the supernatant by using a hollow fiber ultrafiltration membrane, recovering the filtrate to a sludge treatment system, compressing the filtrate together with the flocculating constituent into a filter cake, transporting the filter cake outwards, and directly discharging the filtrate.
2. The UV-FENTON wastewater treatment process according to claim 1, wherein: the pH value of the S1 is 3-3.5.
3. The UV-FENTON wastewater treatment process according to claim 1, wherein: the pH regulator in S3 is sodium hydroxide solution or calcium hydroxide solution.
4. The UV-FENTON wastewater treatment process according to claim 1, wherein: the flocculant is polyacrylamide.
5. The UV-FENTON wastewater treatment process according to claim 1, wherein: the coagulant aid is activated silicic acid.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103534023A (en) * | 2011-05-17 | 2014-01-22 | 独立行政法人农业·食品产业技术综合研究机构 | Fenton reaction catalyst produced using reducing organic substance as raw material |
| CN103908966A (en) * | 2014-04-21 | 2014-07-09 | 哈尔滨工业大学 | Multiphase Fenton catalyst as well as preparation method and application thereof |
| CN205295084U (en) * | 2015-12-28 | 2016-06-08 | 四川希望环保工程技术有限公司 | Processing system of wax printing waste water |
| CN105665028A (en) * | 2016-03-08 | 2016-06-15 | 哈尔滨工业大学 | Nano heterogeneous Fenton catalyst with alginate core coated with copper/magnetic Fe3O4 and preparation method of Nano heterogeneous Fenton catalyst |
| CN105688764A (en) * | 2016-01-23 | 2016-06-22 | 福建师范大学 | Coated nano iron ball as well as preparation and application thereof |
| CN107321384A (en) * | 2017-06-27 | 2017-11-07 | 广西大学 | The preparation method and applications of lignocellulosic ester/sodium alginate complex spherical class fenton catalyst |
| CN109133323A (en) * | 2018-10-19 | 2019-01-04 | 中国地质大学（北京） | A kind of Waste water treatment medicament and its application method |
-
2020
- 2020-01-16 CN CN202010048694.1A patent/CN111233225B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103534023A (en) * | 2011-05-17 | 2014-01-22 | 独立行政法人农业·食品产业技术综合研究机构 | Fenton reaction catalyst produced using reducing organic substance as raw material |
| CN103908966A (en) * | 2014-04-21 | 2014-07-09 | 哈尔滨工业大学 | Multiphase Fenton catalyst as well as preparation method and application thereof |
| CN205295084U (en) * | 2015-12-28 | 2016-06-08 | 四川希望环保工程技术有限公司 | Processing system of wax printing waste water |
| CN105688764A (en) * | 2016-01-23 | 2016-06-22 | 福建师范大学 | Coated nano iron ball as well as preparation and application thereof |
| CN105665028A (en) * | 2016-03-08 | 2016-06-15 | 哈尔滨工业大学 | Nano heterogeneous Fenton catalyst with alginate core coated with copper/magnetic Fe3O4 and preparation method of Nano heterogeneous Fenton catalyst |
| CN107321384A (en) * | 2017-06-27 | 2017-11-07 | 广西大学 | The preparation method and applications of lignocellulosic ester/sodium alginate complex spherical class fenton catalyst |
| CN109133323A (en) * | 2018-10-19 | 2019-01-04 | 中国地质大学（北京） | A kind of Waste water treatment medicament and its application method |
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