CN111233218A - Catalytic FENTON wastewater treatment process - Google Patents

Catalytic FENTON wastewater treatment process Download PDF

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Publication number
CN111233218A
CN111233218A CN202010048718.3A CN202010048718A CN111233218A CN 111233218 A CN111233218 A CN 111233218A CN 202010048718 A CN202010048718 A CN 202010048718A CN 111233218 A CN111233218 A CN 111233218A
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tank
enters
organic wastewater
wastewater
iron
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王中洲
许坚立
罗时丽
王丽
程洋洋
佘征平
吴修宏
王丽琼
邹祝琪
陆家勋
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Shenzhen Lanqing Environmental Technology Engineering Co ltd
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Shenzhen Lanqing Environmental Technology Engineering Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • 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
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • 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
    • C02F1/52—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
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F2001/007—Processes including a sedimentation step
    • 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
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions

Abstract

The invention relates to a catalytic FENTON wastewater treatment process, which specifically comprises the following treatment steps: s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment; s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil; s3, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank2SO4After the pH value of the solution is adjusted, feeding the solution into a Fenton reaction tank; s4, a Fenton reaction tank: filling iron-carbon filler into organic wastewater, and adding H2O2Solution and FeSO4The solution reacts for 0.5 to 1.5 hours; s5, degassing and neutralizing a pool: the effluent enters a degassing neutralization tank, and the pH value of the wastewater is adjusted to 7.5-8.5; s6, a coagulation tank: the effluent enters a coagulation tank, polyacrylamide is added, and a flocculating constituent is formed by stirring; s7, a sedimentation tank: the effluent enters a sedimentation tank, sedimentation is recovered to a sludge treatment system, and supernatant enters a secondary filtering tank; s8, secondary filtering tank: and filtering the supernatant, and directly discharging the filtrate. The invention improves the treatment effect of the organic wastewater, thereby leading the organic wastewater to reach the discharge standard.

Description

Catalytic FENTON wastewater treatment process
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a catalytic FENTON wastewater treatment process.
Background
The treatment of high-concentration organic wastewater difficult to degrade is a 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 "high concentration", it is meant that the organic matter concentration (in terms of COD) of such wastewater is relatively high, generally above 2000mg/l, and some even up to tens of thousands to hundreds of thousands of milligrams per liter; 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 COD concentration more than 2000mg/l and BOD5/COD value less than 0.3 is commonly called high-concentration refractory organic wastewater in the industry.
The reason why the high concentration of the hardly degradable organic wastewater is difficult to biologically treat 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 concentration of organic matters contained in the wastewater is high; (2) the variety of the difficultly biodegradable substances in the organic matters is high; (3) besides organic matters, the salt concentration of the wastewater is higher; (4) the wastewater treatment method itself has a great problem.
The organic wastewater is generally treated by a biochemical method in the market, and the traditional biochemical method is a/O (anaerobic/aerobic), a2/O (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+The hydroxyl free radical has high electronegativity or electrophilicity and strong addition reaction characteristics, and can oxidize a plurality of known organic compounds such as carboxylic acid, alcohol and ester into inorganic states, 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 catalytic FENTON wastewater treatment process, which can enable organic wastewater to reach the discharge standard by improving the treatment effect of the organic wastewater.
The above object of the present invention is achieved by the following technical solutions:
a catalytic FENTON wastewater treatment process specifically comprises the following treatment steps:
s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment, and then the organic wastewater enters a deoiling tank;
s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil, and then the organic wastewater enters an intermediate tank;
s3, 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;
s4, a Fenton reaction tank: firstly, filling iron-carbon filler into organic wastewater, and then adding H into a Fenton reaction tank through a dosing system2O2Solution and FeSO4Solution of H2O2With Fe2+In a molar ratio of 4: 1; the retention time of the organic wastewater in the Fenton reaction tank is 0.5-1.5h, so that the organic matters are fully reacted and decomposed in the Fenton reaction tank;
s5, degassing and neutralizing a pool: the effluent of the Fenton reaction tank enters a degassing neutralization tank, and O generated by the Fenton reaction is removed by stirring2Adding NaOH solution, and adjusting the pH value of the wastewater to 7.5-8.5;
s6, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, polyacrylamide is added through a dosing system, and a flocculating constituent is formed through stirring;
s7, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, a flocculating constituent is settled at the lower part of the sedimentation tank, a clear boundary is formed between the flocculating constituent and the supernatant at the upper part of the sedimentation tank, the flocculating constituent is recycled to a sludge treatment system, and the supernatant enters a secondary filter tank;
s8, secondary filtering tank: and filtering the supernatant, 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, organic wastewater enters the Fenton reaction tank, the iron-carbon filler is soaked in the wastewater solution, and the iron atom and the carbon atom have electrode potential difference, so thatCountless micro-battery systems are formed, an electric field is formed in the action space of the micro-battery systems, and a large amount of Fe with high adsorption and flocculation activities is generated by the anode reaction2+Entering an organic wastewater system to have a flocculation reaction with organic matters to generate precipitates, Fe2+Simultaneously with H2O2The solution reacts to generate OH, the strong oxidizing property of the OH has the function of decomposing organic matters, and the cathode reaction generates a large amount of nascent state [ H]And [ O]Under acidic condition, the active ingredients can generate oxidation-reduction reaction with multiple components in the wastewater, so that organic macromolecules are subjected to chain scission degradation and are directly decomposed into CO2、H2O and other harmless substances, thereby eliminating the chromaticity of organic matters, improving the biochemical degree of the organic wastewater and avoiding secondary pollution;
the Fenton reaction and the iron-carbon filler electrolysis reaction are combined for use and are matched with each other, so that the decomposition efficiency of organic matters in the organic wastewater is improved, the treatment effect of the organic wastewater is improved, and the organic wastewater reaches the specified discharge standard;
before the organic wastewater enters the Fenton reaction tank, the organic wastewater is subjected to oil removal treatment, so that the phenomenon that the electrolytic performance of the organic wastewater is influenced because grease in the organic wastewater is attached to the iron-carbon filler is avoided;
the organic wastewater is degassed, coagulated and precipitated, and then is filtered for the second time, and the purpose of the second filtration is to remove the residual iron-carbon filler in the organic wastewater, so that the organic wastewater reaches the specified discharge standard.
The present invention in a preferred example may be further configured to: the iron-carbon filler comprises the following components in parts by weight: 50-70 parts of iron powder, 10-30 parts of carbon powder, 5-15 parts of titanium dioxide powder, 4-8 parts of binder and 3-6 parts of pore-forming agent.
By adopting the technical scheme, the proportion of the iron powder and the carbon powder needs to be controlled in a proper range, the content of the iron powder is relatively large, on one hand, the iron powder is used for improving the strength of the iron-carbon filler and avoiding the iron-carbon filler from being broken and crushed in an acid system, and on the other hand, the iron powder is beneficial to improving Fe in the system2+Thereby increasing the flocculation amount of organic matters and the OH conversion amount, and further improving the treatment effect of organic wastewater；
The titanium dioxide has good conductivity and plays a role in catalysis in a system, so that the treatment effect of the organic wastewater is further improved; titanium dioxide also has good adhesion for bonding other components, thereby improving the tightness of the connection between the components, and thus improving the strength of the iron-carbon filler.
The present invention in a preferred example may be further configured to: the binder is clay.
Through adopting above-mentioned technical scheme, clay and titanium dioxide all have good viscidity, and both cooperations are used, are favorable to reducing the quantity of clay to avoid the too much and lead to the carbon atom effect of droing to descend and lead to the phenomenon of hardening to appear in the iron carbon filler of clay addition.
The present invention in a preferred example may be further configured to: the pore-forming agent is Na2SO4And (3) powder.
The present invention in a preferred example may be further configured to: the iron-carbon filler is spherical filler, and the particle size of the iron-carbon filler is controlled to be 10-25 mm.
By adopting the technical scheme, the particle size of the iron-carbon filler has influence on the internal porosity, when the porosity is too small, the resistance for the organic wastewater to flow through is too large, and the amount of water trapped inside the filler is small, so that the decomposition reaction effect of organic matters is reduced; when the porosity is larger, the particle size of the iron-carbon filler is too large, the specific surface area between the iron-carbon fillers is smaller, the dead space is larger, the filler area through which water molecules flow is reduced, and the decomposition reaction effect of organic matters is reduced; therefore, the particle size of the iron-carbon filler should be controlled within a suitable range, thereby improving the treatment effect of the organic wastewater.
The present invention in a preferred example may be further configured to: the iron-carbon filler is sintered at the temperature of 1300-1800 ℃.
By adopting the technical scheme, the iron-carbon filler formed by high-temperature sintering has stronger hardness, and the high-temperature sintering is favorable for reducing the hardening problem of the iron-carbon filler, thereby prolonging the service life of the iron-carbon filler.
The present invention in a preferred example may be further configured to: the mass fraction ratio of the organic wastewater to the iron-carbon filler is (4-6) to 2.
By adopting the technical scheme, the adding ratio of the organic wastewater to the iron-carbon filler is controlled within a proper range, and when the adding amount of the iron-carbon filler is too small, organic matters cannot be completely decomposed; when the iron-carbon filler is excessively added, the redundant iron-carbon filler can form new precipitates, and the treatment effect of the organic wastewater is influenced.
The present invention in a preferred example may be further configured to: adding a NaCl solution into the Fenton reaction tank, wherein the mass fraction ratio of the NaCl solution to the iron-carbon filler is 1: (2-3).
By adopting the technical scheme, the NaCl solution has a good catalytic effect, and is added into the system, so that the reaction efficiency of the system is improved, and the treatment effect of the organic wastewater is improved; the NaCl solution is environment-friendly, non-toxic and easy to remove, so that the NaCl solution is selected as the catalyst in the scheme.
The present invention in a preferred example may be further configured to: the pH value in S3 is 3-4.
By adopting the technical scheme, the acidity of the organic wastewater before entering the Fenton reaction tank can influence the reaction effect of a Fenton reaction system, the reaction efficiency of the Fenton reaction and the electrolytic reaction is greatly improved under the acidic condition, and the reaction effect is optimal when the pH value of the organic wastewater is 3-4.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the Fenton reaction and the iron-carbon filler electrolysis reaction are combined for use and are matched with each other, so that the decomposition efficiency of organic matters in the organic wastewater is improved, the treatment effect of the organic wastewater is improved, and the organic wastewater reaches the specified discharge standard; 2. the titanium dioxide has good conductivity and plays a role in catalysis in a system, so that the treatment effect of the organic wastewater is further improved; the titanium dioxide also has good viscosity and is used for bonding other components, so that the connection tightness among the components is improved, and the strength of the iron-carbon filler is improved;
3. the particle size of the iron-carbon filler has influence on the internal porosity, when the porosity is too small, the resistance for the organic wastewater to flow through is too large, and the amount of water trapped inside the filler is small, so that the decomposition reaction effect of organic matters is reduced; when the porosity is larger, the particle size of the iron-carbon filler is too large, the specific surface area between the iron-carbon fillers is smaller, the dead space is larger, the filler area through which water molecules flow is reduced, and the decomposition reaction effect of organic matters is reduced; the particle size of the iron-carbon filler is controlled within a proper range, so that the treatment effect of the organic wastewater is improved.
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 catalytic FENTON wastewater treatment process disclosed by the invention, which specifically comprises the following treatment steps:
s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment, and then the organic wastewater enters a deoiling tank;
s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil, and then the organic wastewater enters an intermediate tank;
s3, 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;
s4, a Fenton reaction tank: firstly, filling iron-carbon filler with the particle size of 15mm into organic wastewater, wherein the mass fraction ratio of the organic wastewater to the iron-carbon filler is 5: 2; adding H into the Fenton reaction tank through a dosing system2O2Solution and FeSO4Solution of H2O2With Fe2 +In a molar ratio of 4: 1; and finally, adding a NaCl solution into the Fenton reaction tank, wherein the mass fraction ratio of the NaCl solution to the iron-carbon filler is 1: 2.5; the retention time of the organic wastewater in the Fenton reaction tank is 1h, so that the organic matters are fully reacted and decomposed in the Fenton reaction tank;
s5, degassing and neutralizing a pool:the effluent of the Fenton reaction tank enters a degassing neutralization tank, and O generated by the Fenton reaction is removed by stirring2Adding NaOH solution, and adjusting the pH value of the wastewater to 8;
s6, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, polyacrylamide is added through a dosing system, and a flocculating constituent is formed through stirring;
s7, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, a flocculating constituent is settled at the lower part of the sedimentation tank, a clear boundary is formed between the flocculating constituent and the supernatant at the upper part of the sedimentation tank, the flocculating constituent is recycled to a sludge treatment system, and the supernatant enters a secondary filter tank;
s8, secondary filtering tank: filtering the supernatant, 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;
the iron-carbon filler is formed by sintering at 1500 ℃, and comprises the following components in parts by weight: 60 parts of iron powder, 20 parts of carbon powder, 10 parts of titanium dioxide powder, 6 parts of clay and Na2SO44.5 parts of powder.
Example 2, the difference from example 1 is that: the particle size of the iron-carbon filler is 10 mm.
Example 3, the difference from example 1 is that: the particle size of the iron-carbon filler is 15 mm.
Example 4, the difference from example 1 is that: the particle size of the iron-carbon filler is 20 mm.
Embodiment 5 is a catalytic FENTON wastewater treatment process disclosed by the invention, which specifically comprises the following treatment steps:
s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment, and then the organic wastewater enters a deoiling tank;
s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil, and then the organic wastewater enters an intermediate tank;
s3, 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;
s4, a Fenton reaction tank:firstly, filling iron-carbon filler with the particle size of 15mm into organic wastewater, wherein the mass fraction ratio of the organic wastewater to the iron-carbon filler is 4: 2; adding H into the Fenton reaction tank through a dosing system2O2Solution and FeSO4Solution of H2O2With Fe2 +In a molar ratio of 4: 1; and finally, adding a NaCl solution into the Fenton reaction tank, wherein the mass fraction ratio of the NaCl solution to the iron-carbon filler is 1: 2.5; the retention time of the organic wastewater in the Fenton reaction tank is 1h, so that the organic matters are fully reacted and decomposed in the Fenton reaction tank;
s5, degassing and neutralizing a pool: the effluent of the Fenton reaction tank enters a degassing neutralization tank, and O generated by the Fenton reaction is removed by stirring2Adding NaOH solution, and adjusting the pH value of the wastewater to 8;
s6, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, polyacrylamide is added through a dosing system, and a flocculating constituent is formed through stirring;
s7, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, a flocculating constituent is settled at the lower part of the sedimentation tank, a clear boundary is formed between the flocculating constituent and the supernatant at the upper part of the sedimentation tank, the flocculating constituent is recycled to a sludge treatment system, and the supernatant enters a secondary filter tank;
s8, secondary filtering tank: filtering the supernatant, 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;
the iron-carbon filler is sintered at 1500 ℃, and comprises the same components as in example 1.
Embodiment 6 is a catalytic FENTON wastewater treatment process disclosed by the invention, which specifically comprises the following treatment steps:
s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment, and then the organic wastewater enters a deoiling tank;
s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil, and then the organic wastewater enters an intermediate tank;
s3, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4The solution adjusts the pH value of the waste water to 3.5, and then the organic waste is treatedFeeding water into the Fenton reaction tank through a water inlet pump;
s4, a Fenton reaction tank: firstly, filling iron-carbon filler with the particle size of 15mm into organic wastewater, wherein the mass fraction ratio of the organic wastewater to the iron-carbon filler is 6: 2; adding H into the Fenton reaction tank through a dosing system2O2Solution and FeSO4Solution of H2O2With Fe2 +In a molar ratio of 4: 1; and finally, adding a NaCl solution into the Fenton reaction tank, wherein the mass fraction ratio of the NaCl solution to the iron-carbon filler is 1: 2.5; the retention time of the organic wastewater in the Fenton reaction tank is 1h, so that the organic matters are fully reacted and decomposed in the Fenton reaction tank;
s5, degassing and neutralizing a pool: the effluent of the Fenton reaction tank enters a degassing neutralization tank, and O generated by the Fenton reaction is removed by stirring2Adding NaOH solution, and adjusting the pH value of the wastewater to 8;
s6, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, polyacrylamide is added through a dosing system, and a flocculating constituent is formed through stirring;
s7, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, a flocculating constituent is settled at the lower part of the sedimentation tank, a clear boundary is formed between the flocculating constituent and the supernatant at the upper part of the sedimentation tank, the flocculating constituent is recycled to a sludge treatment system, and the supernatant enters a secondary filter tank;
s8, secondary filtering tank: filtering the supernatant, 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;
the iron-carbon filler is sintered at 1500 ℃, and comprises the same components as in example 1.
Embodiment 7 is a catalytic FENTON wastewater treatment process disclosed by the invention, which specifically comprises the following treatment steps:
s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment, and then the organic wastewater enters a deoiling tank;
s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil, and then the organic wastewater enters an intermediate tank;
s3, intermediate pool: organic waste water enters an intermediate tank and is added with medicineAdding H into the intermediate pool by the 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;
s4, a Fenton reaction tank: firstly, filling iron-carbon filler with the particle size of 15mm into organic wastewater, wherein the mass fraction ratio of the organic wastewater to the iron-carbon filler is 5: 2; adding H into the Fenton reaction tank through a dosing system2O2Solution and FeSO4Solution of H2O2With Fe2 +In a molar ratio of 4: 1; and finally, adding a NaCl solution into the Fenton reaction tank, wherein the mass fraction ratio of the NaCl solution to the iron-carbon filler is 1: 2; the retention time of the organic wastewater in the Fenton reaction tank is 1h, so that the organic matters are fully reacted and decomposed in the Fenton reaction tank;
s5, degassing and neutralizing a pool: the effluent of the Fenton reaction tank enters a degassing neutralization tank, and O generated by the Fenton reaction is removed by stirring2Adding NaOH solution, and adjusting the pH value of the wastewater to 8;
s6, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, polyacrylamide is added through a dosing system, and a flocculating constituent is formed through stirring;
s7, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, a flocculating constituent is settled at the lower part of the sedimentation tank, a clear boundary is formed between the flocculating constituent and the supernatant at the upper part of the sedimentation tank, the flocculating constituent is recycled to a sludge treatment system, and the supernatant enters a secondary filter tank;
s8, secondary filtering tank: filtering the supernatant, 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;
the iron-carbon filler is sintered at 1500 ℃, and comprises the same components as in example 1.
Embodiment 8 discloses a catalytic FENTON wastewater treatment process, which specifically comprises the following treatment steps:
s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment, and then the organic wastewater enters a deoiling tank;
s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil, and then the organic wastewater enters an intermediate tank;
s3, 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;
s4, a Fenton reaction tank: firstly, filling iron-carbon filler with the particle size of 15mm into organic wastewater, wherein the mass fraction ratio of the organic wastewater to the iron-carbon filler is 5: 2; adding H into the Fenton reaction tank through a dosing system2O2Solution and FeSO4Solution of H2O2With Fe2 +In a molar ratio of 4: 1; and finally, adding a NaCl solution into the Fenton reaction tank, wherein the mass fraction ratio of the NaCl solution to the iron-carbon filler is 1: 3; the retention time of the organic wastewater in the Fenton reaction tank is 1h, so that the organic matters are fully reacted and decomposed in the Fenton reaction tank;
s5, degassing and neutralizing a pool: the effluent of the Fenton reaction tank enters a degassing neutralization tank, and O generated by the Fenton reaction is removed by stirring2Adding NaOH solution, and adjusting the pH value of the wastewater to 8;
s6, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, polyacrylamide is added through a dosing system, and a flocculating constituent is formed through stirring;
s7, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, a flocculating constituent is settled at the lower part of the sedimentation tank, a clear boundary is formed between the flocculating constituent and the supernatant at the upper part of the sedimentation tank, the flocculating constituent is recycled to a sludge treatment system, and the supernatant enters a secondary filter tank;
s8, secondary filtering tank: filtering the supernatant, 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;
the iron-carbon filler is sintered at 1500 ℃, and comprises the same components as in example 1.
Embodiment 9 is a catalytic FENTON wastewater treatment process disclosed by the present invention, which specifically comprises the following treatment steps:
s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment, and then the organic wastewater enters a deoiling tank;
s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil, and then the organic wastewater enters an intermediate tank;
s3, 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;
s4, a Fenton reaction tank: firstly, filling iron-carbon filler with the particle size of 15mm into organic wastewater, wherein the mass fraction ratio of the organic wastewater to the iron-carbon filler is 5: 2; adding H into the Fenton reaction tank through a dosing system2O2Solution and FeSO4Solution of H2O2With Fe2 +In a molar ratio of 4: 1; and finally, adding a NaCl solution into the Fenton reaction tank, wherein the mass fraction ratio of the NaCl solution to the iron-carbon filler is 1: 2.5; the retention time of the organic wastewater in the Fenton reaction tank is 0.5h, so that the organic matters are fully reacted and decomposed in the Fenton reaction tank;
s5, degassing and neutralizing a pool: the effluent of the Fenton reaction tank enters a degassing neutralization tank, and O generated by the Fenton reaction is removed by stirring2Adding NaOH solution, and adjusting the pH value of the wastewater to 8;
s6, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, polyacrylamide is added through a dosing system, and a flocculating constituent is formed through stirring;
s7, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, a flocculating constituent is settled at the lower part of the sedimentation tank, a clear boundary is formed between the flocculating constituent and the supernatant at the upper part of the sedimentation tank, the flocculating constituent is recycled to a sludge treatment system, and the supernatant enters a secondary filter tank;
s8, secondary filtering tank: filtering the supernatant, 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;
the iron-carbon filler is sintered at 1500 ℃, and comprises the same components as in example 1.
Embodiment 10 is a catalytic FENTON wastewater treatment process disclosed by the invention, which specifically comprises the following treatment steps:
s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment, and then the organic wastewater enters a deoiling tank;
s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil, and then the organic wastewater enters an intermediate tank;
s3, 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;
s4, a Fenton reaction tank: firstly, filling iron-carbon filler with the particle size of 15mm into organic wastewater, wherein the mass fraction ratio of the organic wastewater to the iron-carbon filler is 5: 2; adding H into the Fenton reaction tank through a dosing system2O2Solution and FeSO4Solution of H2O2With Fe2 +In a molar ratio of 4: 1; and finally, adding a NaCl solution into the Fenton reaction tank, wherein the mass fraction ratio of the NaCl solution to the iron-carbon filler is 1: 2.5; the retention time of the organic wastewater in the Fenton reaction tank is 1.5h, so that the organic matters are fully reacted and decomposed in the Fenton reaction tank;
s5, degassing and neutralizing a pool: the effluent of the Fenton reaction tank enters a degassing neutralization tank, and O generated by the Fenton reaction is removed by stirring2Adding NaOH solution, and adjusting the pH value of the wastewater to 8;
s6, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, polyacrylamide is added through a dosing system, and a flocculating constituent is formed through stirring;
s7, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, a flocculating constituent is settled at the lower part of the sedimentation tank, a clear boundary is formed between the flocculating constituent and the supernatant at the upper part of the sedimentation tank, the flocculating constituent is recycled to a sludge treatment system, and the supernatant enters a secondary filter tank;
s8, secondary filtering tank: filtering the supernatant, 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;
the iron-carbon filler is sintered at 1500 ℃, and comprises the same components as in example 1.
Embodiment 11 is a catalytic FENTON wastewater treatment process disclosed in the present invention, which specifically comprises the steps of embodiment 1;
the iron-carbon filler is formed by sintering at 1500 ℃, and comprises the following components in parts by weight: 70 parts of iron powder, 30 parts of carbon powder, 15 parts of titanium dioxide powder, 8 parts of clay and Na2SO4And 6 parts of powder.
Embodiment 12 is a catalytic FENTON wastewater treatment process disclosed in the present invention, specifically comprising the steps of example 1;
the iron-carbon filler is formed by sintering at 1500 ℃, and comprises the following components in parts by weight: 50 parts of iron powder, 10 parts of carbon powder, 5 parts of titanium dioxide powder, 4 parts of clay and Na2SO4And 3 parts of powder.
Comparative example 1, the catalytic FENTON wastewater treatment process disclosed by the invention specifically comprises the following treatment steps:
s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment, and then the organic wastewater enters a deoiling tank;
s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil, and then the organic wastewater enters an intermediate tank;
s3, 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;
s4, 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; adding a NaCl solution into the Fenton reaction tank, wherein the mass fraction ratio of the NaCl solution to the iron-carbon filler is 1: 2.5; the retention time of the organic wastewater in the Fenton reaction tank is 1h, so that the organic matters are fully reacted and decomposed in the Fenton reaction tank;
s5, degassing and neutralizing a pool: the effluent of the Fenton reaction tank enters a degassing neutralization tank, and O generated by the Fenton reaction is removed by stirring2Adding NaOH solution, and adjusting the pH value of the wastewater to 8;
s6, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, polyacrylamide is added through a dosing system, and a flocculating constituent is formed through stirring;
s7, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, a flocculating constituent is settled at the lower part of the sedimentation tank, a clear boundary is formed between the flocculating constituent and the supernatant at the upper part of the sedimentation tank, the flocculating constituent is recycled to a sludge treatment system, and the supernatant enters a secondary filter tank;
s8, secondary filtering tank: and filtering the supernatant, 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, which is a catalytic FENTON wastewater treatment process disclosed by the invention, specifically comprises the steps of example 1;
the iron-carbon filler is formed by sintering at 1500 ℃, and comprises the following components in parts by weight: 60 parts of iron powder, 20 parts of carbon powder, 6 parts of clay and Na2SO44.5 parts of powder.
Comparative example 3, for the catalytic FENTON wastewater treatment process disclosed by the invention, the process specifically comprises the following treatment steps:
s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment, and then the organic wastewater enters a deoiling tank;
s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil, and then the organic wastewater enters an intermediate tank;
s3, 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;
s4, a Fenton reaction tank: firstly, filling iron-carbon filler with the particle size of 15mm into organic wastewater, wherein the mass fraction ratio of the organic wastewater to the iron-carbon filler is 5: 2; adding H into the Fenton reaction tank through a dosing system2O2Solution and FeSO4Solution of H2O2With Fe2 +In a molar ratio of 4: 1; the retention time of the organic wastewater in the Fenton reaction tank is 1h, so that the organic matters are fully reacted and decomposed in the Fenton reaction tank;
s5, degassing and neutralizing a pool: the effluent of the Fenton reaction tank enters into degassingNeutralizing tank for removing O generated by Fenton reaction by stirring2Adding NaOH solution, and adjusting the pH value of the wastewater to 8;
s6, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, polyacrylamide is added through a dosing system, and a flocculating constituent is formed through stirring;
s7, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, a flocculating constituent is settled at the lower part of the sedimentation tank, a clear boundary is formed between the flocculating constituent and the supernatant at the upper part of the sedimentation tank, the flocculating constituent is recycled to a sludge treatment system, and the supernatant enters a secondary filter tank;
s8, secondary filtering tank: filtering the supernatant, 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;
the iron-carbon filler is sintered at 1500 ℃, and comprises the same components as in example 1.
Comparative example 4, which differs from example 1 in that: the particle size of the iron-carbon filler is 8 mm.
Comparative example 5, which differs from example 1 in that: the particle size of the iron-carbon filler was 27 mm.
Comparative example 6, for the catalytic FENTON wastewater treatment process disclosed by the invention, the process specifically comprises the following treatment steps:
s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment, and then the organic wastewater enters a deoiling tank;
s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil, and then the organic wastewater enters an intermediate tank;
s3, 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;
s4, a Fenton reaction tank: firstly, filling iron-carbon filler with the particle size of 15mm into organic wastewater, wherein the mass fraction ratio of the organic wastewater to the iron-carbon filler is 3: 2; adding H into the Fenton reaction tank through a dosing system2O2Solution and FeSO4Solution of H2O2With Fe2 +In a molar ratio of 4: 1; and finally, adding a NaCl solution into the Fenton reaction tank, wherein the mass fraction ratio of the NaCl solution to the iron-carbon filler is 1: 2.5; the retention time of the organic wastewater in the Fenton reaction tank is 1h, so that the organic matters are fully reacted and decomposed in the Fenton reaction tank;
s5, degassing and neutralizing a pool: the effluent of the Fenton reaction tank enters a degassing neutralization tank, and O generated by the Fenton reaction is removed by stirring2Adding NaOH solution, and adjusting the pH value of the wastewater to 8;
s6, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, polyacrylamide is added through a dosing system, and a flocculating constituent is formed through stirring;
s7, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, a flocculating constituent is settled at the lower part of the sedimentation tank, a clear boundary is formed between the flocculating constituent and the supernatant at the upper part of the sedimentation tank, the flocculating constituent is recycled to a sludge treatment system, and the supernatant enters a secondary filter tank;
s8, secondary filtering tank: filtering the supernatant, 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;
the iron-carbon filler is sintered at 1500 ℃, and comprises the same components as in example 1.
Comparative example 7, the invention discloses a catalytic FENTON wastewater treatment process, which specifically comprises the following treatment steps:
s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment, and then the organic wastewater enters a deoiling tank;
s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil, and then the organic wastewater enters an intermediate tank;
s3, 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;
s4, a Fenton reaction tank: firstly, filling iron-carbon filler with the particle size of 15mm into organic wastewater, wherein the mass fraction ratio of the organic wastewater to the iron-carbon filler is 7: 2; adding H into the Fenton reaction tank through a dosing system2O2Solution and FeSO4Solution of H2O2With Fe2 +In a molar ratio of 4: 1; and finally, adding a NaCl solution into the Fenton reaction tank, wherein the mass fraction ratio of the NaCl solution to the iron-carbon filler is 1: 2.5; the retention time of the organic wastewater in the Fenton reaction tank is 1h, so that the organic matters are fully reacted and decomposed in the Fenton reaction tank;
s5, degassing and neutralizing a pool: the effluent of the Fenton reaction tank enters a degassing neutralization tank, and O generated by the Fenton reaction is removed by stirring2Adding NaOH solution, and adjusting the pH value of the wastewater to 8;
s6, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, polyacrylamide is added through a dosing system, and a flocculating constituent is formed through stirring;
s7, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, a flocculating constituent is settled at the lower part of the sedimentation tank, a clear boundary is formed between the flocculating constituent and the supernatant at the upper part of the sedimentation tank, the flocculating constituent is recycled to a sludge treatment system, and the supernatant enters a secondary filter tank;
s8, secondary filtering tank: filtering the supernatant, 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;
the iron-carbon filler is sintered at 1500 ℃, and comprises the same components as in example 1.
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 12 and comparative examples 1 to 7, 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
Figure BDA0002370344330000121
Figure BDA0002370344330000131
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 more than 90 percent, while the removal rate of COD in the comparative example 1 is only 71.9 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: the titanium dioxide powder is added in the formula of the iron-carbon filler, so that the electrolytic reaction performance of the iron-carbon filler is improved, and the COD removal rate of the organic wastewater is improved.
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 (9)

1. A catalytic FENTON wastewater treatment process specifically comprises the following treatment steps:
s1, a filter tank: the organic wastewater enters a filter tank for filtration treatment, and then the organic wastewater enters a deoiling tank;
s2, an oil removal tank: the organic wastewater enters an oil removal tank to remove floating oil, and then the organic wastewater enters an intermediate tank;
s3, intermediate pool: the organic wastewater enters an intermediate tank, and H is added into the intermediate tank through a dosing system2SO4Regulating the pH value of the wastewater by using the solution, and then pumping the organic wastewater into a water inlet pumpFeeding water into the Fenton reaction tank;
s4, a Fenton reaction tank: firstly, filling iron-carbon filler into organic wastewater, and then adding H into a Fenton reaction tank through a dosing system2O2Solution and FeSO4Solution of H2O2With Fe2+In a molar ratio of 4: 1; the retention time of the organic wastewater in the Fenton reaction tank is 0.5-1.5h, so that the organic matters are fully reacted and decomposed in the Fenton reaction tank;
s5, degassing and neutralizing a pool: the effluent of the Fenton reaction tank enters a degassing neutralization tank, and O generated by the Fenton reaction is removed by stirring2Adding NaOH solution, and adjusting the pH value of the wastewater to 7.5-8.5;
s6, a coagulation tank: the effluent of the degassing neutralization tank enters a coagulation tank, polyacrylamide is added through a dosing system, and a flocculating constituent is formed through stirring;
s7, a sedimentation tank: the effluent of the coagulation tank enters a sedimentation tank, a flocculating constituent is settled at the lower part of the sedimentation tank, a clear boundary is formed between the flocculating constituent and the supernatant at the upper part of the sedimentation tank, the flocculating constituent is recycled to a sludge treatment system, and the supernatant enters a secondary filter tank;
s8, secondary filtering tank: and filtering the supernatant, 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 catalytic FENTON wastewater treatment process according to claim 1, wherein: the iron-carbon filler comprises the following components in parts by weight: 50-70 parts of iron powder, 10-30 parts of carbon powder, 5-15 parts of titanium dioxide powder, 4-8 parts of binder and 3-6 parts of pore-forming agent.
3. The catalytic FENTON wastewater treatment process according to claim 2, wherein: the binder is clay.
4. The catalytic FENTON wastewater treatment process according to claim 2, wherein: the pore-forming agent is Na2SO4And (3) powder.
5. The catalytic FENTON wastewater treatment process according to claim 1, wherein: the iron-carbon filler is spherical filler, and the particle size of the iron-carbon filler is controlled to be 10-25 mm.
6. The catalytic FENTON wastewater treatment process according to claim 1, wherein: the iron-carbon filler is sintered at the temperature of 1300-1800 ℃.
7. The catalytic FENTON wastewater treatment process according to claim 1, wherein: the mass fraction ratio of the organic wastewater to the iron-carbon filler is (4-6) to 2.
8. The catalytic FENTON wastewater treatment process according to claim 1, wherein: adding a NaCl solution into the Fenton reaction tank, wherein the mass fraction ratio of the NaCl solution to the iron-carbon filler is 1: (2-3).
9. The catalytic FENTON wastewater treatment process according to claim 1, wherein: the pH value in S3 is 3-4.
CN202010048718.3A 2020-01-16 2020-01-16 Catalytic FENTON wastewater treatment process Pending CN111233218A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114105348A (en) * 2020-08-31 2022-03-01 中国石油化工股份有限公司 Device and method for treating benzo (a) pyrene in coking wastewater
CN115558427A (en) * 2022-10-24 2023-01-03 浙江奥首材料科技有限公司 Polishing solution based on micro-electrolysis-Fenton oxidation system, preparation method and application thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104607189A (en) * 2015-01-09 2015-05-13 刘百山 Reaction speed-controllable iron-titanium dioxide-carbon ternary micro-electrolysis composite nanometer catalyst and preparation method thereof
WO2016056994A1 (en) * 2014-10-10 2016-04-14 Joyce River Hi-Tech Pte Ltd An apparatus for conducting an electro-fenton reaction for decomposing organic chemical compounds
CN105906154A (en) * 2016-06-14 2016-08-31 同济大学 Resourceful treatment and recycling method of circuit board wastewater
JP2019171367A (en) * 2018-03-26 2019-10-10 三菱ケミカルアクア・ソリューションズ株式会社 Method for treating waste liquid containing acidic aggregate and water treatment apparatus
CN110357372A (en) * 2019-08-28 2019-10-22 江苏建筑职业技术学院 A kind of underground coal mine wastewater treatment and renovation device and processing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016056994A1 (en) * 2014-10-10 2016-04-14 Joyce River Hi-Tech Pte Ltd An apparatus for conducting an electro-fenton reaction for decomposing organic chemical compounds
CN104607189A (en) * 2015-01-09 2015-05-13 刘百山 Reaction speed-controllable iron-titanium dioxide-carbon ternary micro-electrolysis composite nanometer catalyst and preparation method thereof
CN105906154A (en) * 2016-06-14 2016-08-31 同济大学 Resourceful treatment and recycling method of circuit board wastewater
JP2019171367A (en) * 2018-03-26 2019-10-10 三菱ケミカルアクア・ソリューションズ株式会社 Method for treating waste liquid containing acidic aggregate and water treatment apparatus
CN110357372A (en) * 2019-08-28 2019-10-22 江苏建筑职业技术学院 A kind of underground coal mine wastewater treatment and renovation device and processing method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
曾郴林等: "《微电解法处理难降解有机废水的理论与实例分析》", 31 October 2017, 《中国环境出版社》 *
韩颖主编: "《十二五普通高等教育本科国家级规划教材 制浆造纸污染控制 第2版》", 31 January 2016, 中国轻工业出版社 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114105348A (en) * 2020-08-31 2022-03-01 中国石油化工股份有限公司 Device and method for treating benzo (a) pyrene in coking wastewater
CN115558427A (en) * 2022-10-24 2023-01-03 浙江奥首材料科技有限公司 Polishing solution based on micro-electrolysis-Fenton oxidation system, preparation method and application thereof

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