CN117602771A - A method for treating municipal and industrial mixed wastewater using combined advanced oxidation method - Google Patents
A method for treating municipal and industrial mixed wastewater using combined advanced oxidation method Download PDFInfo
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Abstract
The invention discloses a method for treating municipal and industrial mixed wastewater by utilizing a combined advanced oxidation method, which comprises the following specific operation steps: s1: removing hair, garbage and large-particle impurities by feeding municipal incoming water into a coarse grid of an original system, lifting the raw incoming water to a fine grid and a cyclone sand basin through a lifting pump room, and removing small particles and suspended matters; s2: the water outlet pipeline of the cyclone sand setting tank is provided with an on-line detection device. The combined method for treating municipal and industrial mixed wastewater by utilizing the combined advanced oxidation method is a method for effectively treating domestic sewage and industrial wastewater by using an iron-carbon micro-electrolysis-Fenton catalytic oxidation-ozone oxidation combined process. The method can efficiently degrade organic matters and heavy metal ions in the wastewater through synergistic effect, and simultaneously achieve denitrification and dephosphorization, and ensure that the water quality is stable and reaches the standard. Can be suitable for wastewater which is difficult to treat and has poor biodegradability, such as sewage treatment plants in various chemical industry parks or sewage treatment stations in enterprises.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a method for treating municipal and industrial mixed wastewater by using a combined advanced oxidation method.
Background
Municipal sewage mainly comprises part of industrial sewage, hospital sewage, domestic sewage and the like. Most municipal sewage contains organic pollutants, has high ammonia nitrogen content, and is directly discharged to the problems of water pollution, eutrophication, ecological system damage in water and the like.
At present, the sewage treatment plant in the chemical industry park of a certain county of Yangyang is designed to have a scale of 2.0 ten thousand m < 3 >/d, and the first-level A emission standard requirements of pollutant emission standards of urban sewage treatment plants (GB 18918-2002) are designed by adopting a treatment process of a coarse grid, a lifting pump room, a fine grid, a rotational flow sand basin, a halfway lifting pump station, a hydrolytic acidification tank, a Carlusel oxidation ditch, a secondary sedimentation tank, a coagulation reaction sedimentation tank, a fiber turntable filter tank and chlorine dioxide disinfection. Because the special sewage plant in chemical industry garden needs to accept and handle chemical industry enterprise waste water in the garden, the chemical industry enterprise type in the garden is different, has production rubber auxiliary agent, has production industrial chemicals, and sewage volume and source are unclear, and quality of water often seriously exceeds standard, has the phenomenon of regular stealth of enterprise moreover, therefore the multiple quality of water index of intaking all exceeds the design value. At present, according to the requirements of the environmental protection agency on the improvement of the drainage execution standard of the sewage plant to meet the V-type standard and the (yellow river basin water pollutant discharge standard of Henan province) (DB 41/2087-2021) primary standard in the surface water environment quality standard (GB 3838-2002) simultaneously, the standard improvement of the sewage plant in the park is required, and the standard improvement is obviously improved.
However, the actual water inflow of the sewage treatment plant of the current household village cannot meet the design requirement, the hydraulic retention time of the operation of a single-group biochemical system is nearly 5 days, and the COD of the effluent of the secondary sedimentation tank is nearly 5 days Cr Still more than 80mg/L, and at this time COD Cr Are organic pollutants which are difficult to degrade.
For example, chinese issued patent publication No.: CN109502755A is a short-cut nitrification-denitrification municipal sewage treatment system and method, comprising a water storage tank, a primary sedimentation tank, a facultative tank, an aerobic tank and a secondary sedimentation tank which are communicated in sequence; a grid is arranged between the water storage tank and the primary sedimentation tank, and municipal wastewater from the water storage tank is subjected to primary removal of suspended matters through the grid; a feed port is arranged between the primary sedimentation tank and the facultative tank; a sewage backflow system is arranged between the aerobic tank and the facultative tank, and a part of sewage in the aerobic tank flows back to the facultative tank through the sewage backflow system; and a sludge reflux system is arranged between the secondary sedimentation tank and the facultative tank, part of sludge is refluxed to the facultative tank, and the rest of sludge is discharged through a sludge discharge system.
The traditional wastewater treatment method is not easy to monitor the water inflow effect of industrial wastewater, and has low standard reaching rate of stable water outflow, thus being unfavorable for processing mixed wastewater from different sources.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a method for treating municipal and industrial mixed wastewater by utilizing a combined advanced oxidation method, and an iron-carbon micro-electrolysis-Fenton catalytic oxidation-ozone oxidation combined process is a method for effectively treating domestic sewage and industrial wastewater mixed wastewater. The method can efficiently degrade organic matters and heavy metal ions in the wastewater through synergistic effect, and simultaneously achieve denitrification and dephosphorization, and ensure that the water quality is stable and reaches the standard. Can be suitable for sewage treatment plants in various chemical industry parks or sewage treatment stations in enterprises and other complex and difficult to treat waste water with poor biodegradability, and solves the problems proposed by the background technology.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: a method for treating municipal and industrial mixed wastewater by utilizing a combined advanced oxidation method comprises the following specific operation steps:
s1: removing hair, garbage and large-particle impurities by feeding municipal incoming water into a coarse grid of an original system, lifting the raw incoming water to a fine grid and a cyclone sand basin through a lifting pump room, and removing small particles and suspended matters;
s2: the water outlet pipeline of the cyclone sand setting tank is provided with an online detection device, if the COD of the discharged water is qualified, the discharged water enters the comprehensive regulating tank, if the COD exceeds the standard, the discharged water is discharged into an accident tank for temporary storage, and then the discharged water is discharged into an industrial regulating tank;
s3: the chemical wastewater discharged by enterprises is managed by one enterprise and one pipe, an online detection device is arranged on the water inlet pipe, the enterprises are informed of stopping water discharge if the water inlet exceeds the standard, and the water enters an industrial regulating tank if the water inlet condition is met;
s4: mixing industrial wastewater and unqualified municipal incoming water in an industrial regulating tank, and entering an iron-carbon micro-electrolysis-Fenton catalytic oxidation combined process treatment system for pretreatment;
s5: the Fenton effluent enters a primary sedimentation tank for solid-liquid separation after neutral adjustment, and the supernatant flows into a comprehensive regulating tank automatically;
s6: the water in the comprehensive regulating tank is lifted to a hydrolysis acidification tank by a pump, insoluble organic matters in the water are hydrolyzed into soluble organic matters by utilizing hydrolysis acidification bacteria, and macromolecule substances which are difficult to biodegrade are further converted into small molecules which are easy to biodegrade, so that the biodegradability of the water is improved;
s7: the effluent enters an improved Carlusel oxidation ditch, sewage runs alternately through anaerobic, anoxic and aerobic conditions, most of organic pollutants are removed through microbial oxidation under the aerobic condition, and the functions of denitrification and dephosphorization are achieved;
s8: the effluent automatically flows into a secondary sedimentation tank for solid-liquid separation, and the supernatant automatically flows into a reaction sedimentation tank, coagulant and flocculant are added into the reaction sedimentation tank, so that suspended matters and colloid form sediment to be removed;
s9: the supernatant enters a fiber rotary disc filter to further remove suspended particulate matters, and then is lifted to a denitrification biological filter by a pump to further remove organic matters and ammonia nitrogen;
s10: the effluent enters an ozone system, and the ozone gas with stronger oxidability is utilized to further oxidize and degrade organic matters in the wastewater, so that the water quality purification and decolorization can be realized, the effluent is ensured to reach the standard stably, and the effluent reaching the standard is discharged after being metered.
Preferably, the iron-carbon micro-electrolysis cell in the step S4 contains iron-carbon filler, partial organic pollutants are primarily degraded in the process under the acidic condition, fe2+ is generated, the treated water enters a Fenton oxidation cell, and the Fe2+ is used as a catalyst to treat H 2 O 2 The OH-generated by catalysis is used for degrading organic matters, and organic macromolecular matters difficult to biodegrade are converted into easily biodegraded micromolecular matters or decomposed into inorganic matters such as carbon dioxide, water and the like.
Preferably, the sludge generated in the step S8 is returned to the hydrolytic acidification tank and the oxidation ditch by a sludge return pump to increase the concentration of the sludge in the tank, the sludge generated in the hydrolytic acidification tank, the primary sedimentation tank and the reaction sedimentation tank is discharged to a sludge storage tank, the sludge is pumped to a sludge concentration dehydrator by a sludge lifting pump to be dehydrated, and the dehydrated sludge is regularly pulled to a qualified sludge disposal center by a truck to be treated.
Preferably, the sludge generated in the step S4, the step S5 and the step S8 enters a sludge storage tank and is discharged outwards periodically through a dewatering machine room.
(III) beneficial effects
Compared with the prior art, the invention has the following beneficial effects:
the combined process of iron-carbon micro-electrolysis-Fenton catalytic oxidation-ozone oxidation is a method for effectively treating mixed wastewater of domestic sewage and industrial wastewater. The method can efficiently degrade organic matters and heavy metal ions in the wastewater through synergistic effect, and simultaneously achieve denitrification and dephosphorization, and ensure that the water quality is stable and reaches the standard. Can be suitable for wastewater which is difficult to treat and has poor biodegradability, such as sewage treatment plants in various chemical industry parks or sewage treatment stations in enterprises.
Drawings
FIG. 1 is a schematic diagram of the overall flow structure of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1, a method for treating municipal and industrial mixed wastewater by using a combined advanced oxidation method comprises the following specific operation steps:
s1: removing hair, garbage and large-particle impurities by feeding municipal incoming water into a coarse grid of an original system, lifting the raw incoming water to a fine grid and a cyclone sand basin through a lifting pump room, and removing small particles and suspended matters;
s2: the water outlet pipeline of the cyclone sand setting tank is provided with an online detection device, if the COD of the discharged water is qualified, the discharged water enters the comprehensive regulating tank, if the COD exceeds the standard, the discharged water is discharged into an accident tank for temporary storage, and then the discharged water is discharged into an industrial regulating tank;
s3: the chemical wastewater discharged by enterprises is managed by one enterprise and one pipe, an online detection device is arranged on the water inlet pipe, the enterprises are informed of stopping water discharge if the water inlet exceeds the standard, and the water enters an industrial regulating tank if the water inlet condition is met;
s4: mixing industrial wastewater and unqualified municipal incoming water in an industrial regulating tank, and entering an iron-carbon micro-electrolysis-Fenton catalytic oxidation combined process treatment system for pretreatment;
s5: the Fenton effluent enters a primary sedimentation tank for solid-liquid separation after neutral adjustment, and the supernatant flows into a comprehensive regulating tank automatically;
s6: the water in the comprehensive regulating tank is lifted to a hydrolysis acidification tank by a pump, insoluble organic matters in the water are hydrolyzed into soluble organic matters by utilizing hydrolysis acidification bacteria, and macromolecule substances which are difficult to biodegrade are further converted into small molecules which are easy to biodegrade, so that the biodegradability of the water is improved;
s7: the effluent enters an improved Carlusel oxidation ditch, sewage runs alternately through anaerobic, anoxic and aerobic conditions, most of organic pollutants are removed through microbial oxidation under the aerobic condition, and the functions of denitrification and dephosphorization are achieved;
s8: the effluent automatically flows into a secondary sedimentation tank for solid-liquid separation, and the supernatant automatically flows into a reaction sedimentation tank, coagulant and flocculant are added into the reaction sedimentation tank, so that suspended matters and colloid form sediment to be removed;
s9: the supernatant enters a fiber rotary disc filter to further remove suspended particulate matters, and then is lifted to a denitrification biological filter by a pump to further remove organic matters and ammonia nitrogen;
s10: the effluent enters an ozone system, and the ozone gas with stronger oxidability is utilized to further oxidize and degrade organic matters in the wastewater, so that the water quality purification and decolorization can be realized, the effluent is ensured to reach the standard stably, and the effluent reaching the standard is discharged after being metered.
Aiming at the step S4, the iron-carbon micro-electrolysis cell contains iron-carbon filler, part of organic pollutants are primarily degraded in the process under the acidic condition, fe2+ is generated, the treated water enters a Fenton oxidation cell, and the Fe2+ is used as a catalyst to treat H 2 O 2 The OH-generated by catalysis is used for degrading organic matters, and organic macromolecular matters difficult to biodegrade are converted into easily biodegraded micromolecular matters or decomposed into inorganic matters such as carbon dioxide, water and the like.
And S4, setting a stirrer, namely fully mixing and stirring the industrial wastewater and unqualified municipal incoming water in an industrial regulating tank, so that the mixed wastewater can be comprehensively treated, wherein the stirrer comprises a motor and stirring blades, and the stirring blades are driven to rotate by the motor so as to realize full mixing.
And (3) for the sludge generated in the step S8, the sludge is returned to the hydrolysis acidification tank and the oxidation ditch by a sludge return pump so as to increase the concentration of the sludge in the tank, the sludge generated by the hydrolysis acidification tank, the primary sedimentation tank and the reaction sedimentation tank is discharged to a sludge storage tank, the sludge is pumped to a sludge concentration dehydrator by a sludge lifting pump so as to be dehydrated, and the dehydrated sludge is pulled to a qualified sludge disposal center by a truck for treatment at regular intervals.
The sludge generated in the step S4, the step S5 and the step S8 enters a sludge storage pool and is discharged outwards periodically through a dewatering machine room.
The combined process of iron-carbon micro-electrolysis-Fenton catalytic oxidation-ozone oxidation is a method for effectively treating mixed wastewater of domestic sewage and industrial wastewater. The method can efficiently degrade organic matters and heavy metal ions in the wastewater through synergistic effect, and simultaneously achieve denitrification and dephosphorization, and ensure that the water quality is stable and reaches the standard. Can be suitable for wastewater which is difficult to treat and has poor biodegradability, such as sewage treatment plants in various chemical industry parks or sewage treatment stations in enterprises.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A method for treating municipal and industrial mixed wastewater by using a combined advanced oxidation method is characterized in that: the method comprises the following specific operation steps:
s1: removing hair, garbage and large-particle impurities by feeding municipal incoming water into a coarse grid of an original system, lifting the raw incoming water to a fine grid and a cyclone sand basin through a lifting pump room, and removing small particles and suspended matters;
s2: the water outlet pipeline of the cyclone sand setting tank is provided with an online detection device, if the COD of the discharged water is qualified, the discharged water enters the comprehensive regulating tank, if the COD exceeds the standard, the discharged water is discharged into an accident tank for temporary storage, and then the discharged water is discharged into an industrial regulating tank;
s3: the chemical wastewater discharged by enterprises is managed by one enterprise and one pipe, an online detection device is arranged on the water inlet pipe, the enterprises are informed of stopping water discharge if the water inlet exceeds the standard, and the water enters an industrial regulating tank if the water inlet condition is met;
s4: mixing industrial wastewater and unqualified municipal incoming water in an industrial regulating tank, and entering an iron-carbon micro-electrolysis-Fenton catalytic oxidation combined process treatment system for pretreatment;
s5: the Fenton effluent enters a primary sedimentation tank for solid-liquid separation after neutral adjustment, and the supernatant flows into a comprehensive regulating tank automatically;
s6: the water in the comprehensive regulating tank is lifted to a hydrolysis acidification tank by a pump, insoluble organic matters in the water are hydrolyzed into soluble organic matters by utilizing hydrolysis acidification bacteria, and macromolecule substances which are difficult to biodegrade are further converted into small molecules which are easy to biodegrade, so that the biodegradability of the water is improved;
s7: the effluent enters an improved Carlusel oxidation ditch, sewage runs alternately through anaerobic, anoxic and aerobic conditions, most of organic pollutants are removed through microbial oxidation under the aerobic condition, and the functions of denitrification and dephosphorization are achieved;
s8: the effluent automatically flows into a secondary sedimentation tank for solid-liquid separation, and the supernatant automatically flows into a reaction sedimentation tank, coagulant and flocculant are added into the reaction sedimentation tank, so that suspended matters and colloid form sediment to be removed;
s9: the supernatant enters a fiber rotary disc filter to further remove suspended particulate matters, and then is lifted to a denitrification biological filter by a pump to further remove organic matters and ammonia nitrogen;
s10: the effluent enters an ozone system, and the ozone gas with stronger oxidability is utilized to further oxidize and degrade organic matters in the wastewater, so that the water quality purification and decolorization can be realized, the effluent is ensured to reach the standard stably, and the effluent reaching the standard is discharged after being metered.
2. A method of treating municipal and industrial mixed wastewater by means of a combined advanced oxidation process according to claim 1, wherein: aiming at the iron-carbon micro-electrolysis cell in the step S4, the iron-carbon micro-electrolysis cell contains iron-carbon filler under acidic conditionThe organic pollutant in the lower part is primarily degraded in the process, and Fe2+ is generated, the treated water enters a Fenton oxidation pond, and the Fe2+ is used as a catalyst to treat H 2 O 2 Catalytically produced OH - The organic macromolecular substances which are used for degrading organic substances and are difficult to biodegrade are converted into small molecular substances which are easy to biodegrade or are decomposed into inorganic substances such as carbon dioxide, water and the like.
3. A method of treating municipal and industrial mixed wastewater by means of a combined advanced oxidation process according to claim 1, wherein: and (3) for the sludge generated in the step S8, the sludge is returned to the hydrolysis acidification tank and the oxidation ditch by a sludge return pump so as to increase the concentration of the sludge in the tank, the sludge generated by the hydrolysis acidification tank, the primary sedimentation tank and the reaction sedimentation tank is discharged to a sludge storage tank, the sludge is pumped to a sludge concentration dehydrator by a sludge lifting pump so as to be dehydrated, and the dehydrated sludge is pulled to a qualified sludge disposal center by a truck for treatment at regular intervals.
4. A method of treating municipal and industrial mixed wastewater by means of a combined advanced oxidation process according to claim 3, wherein: the sludge generated in the step S4, the step S5 and the step S8 enters a sludge storage pool and is discharged outwards periodically through a dewatering machine room.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118724391A (en) * | 2024-09-03 | 2024-10-01 | 苏州苏沃特环境科技股份有限公司 | A device and method for deep treatment of tail water from a liquor factory |
| CN119059683A (en) * | 2024-09-14 | 2024-12-03 | 中电建路桥集团有限公司 | A biological method for treating domestic sewage |
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| CN102838260A (en) * | 2012-09-22 | 2012-12-26 | 晋江泉荣远东水处理有限公司 | Industrial sewage treatment system and sewage treatment method |
| CN104817235A (en) * | 2015-04-29 | 2015-08-05 | 浩蓝环保股份有限公司 | Town sewage treatment system and town sewage treatment method for high and cold regions |
| CN106927628A (en) * | 2017-03-02 | 2017-07-07 | 南昌大学 | Light electrolysis-Fenton-EGSB-A/O-BCO-BAF-coagulating treatment pharmacy waste water technique |
| CN113371924A (en) * | 2020-03-10 | 2021-09-10 | 北京弘昇达环境科技有限公司 | Advanced sewage treatment process capable of meeting quasi-IV-class water standard |
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| CN118724391A (en) * | 2024-09-03 | 2024-10-01 | 苏州苏沃特环境科技股份有限公司 | A device and method for deep treatment of tail water from a liquor factory |
| CN119059683A (en) * | 2024-09-14 | 2024-12-03 | 中电建路桥集团有限公司 | A biological method for treating domestic sewage |
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