CN215102667U - Sewage advanced treatment composite set - Google Patents
Sewage advanced treatment composite set Download PDFInfo
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- CN215102667U CN215102667U CN202023140689.8U CN202023140689U CN215102667U CN 215102667 U CN215102667 U CN 215102667U CN 202023140689 U CN202023140689 U CN 202023140689U CN 215102667 U CN215102667 U CN 215102667U
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Abstract
The utility model discloses a sewage advanced treatment combined device, wherein a circulating heterogeneous photocatalytic oxidation component carries out photocatalytic oxidation reaction on input sewage; the inclined plate sedimentation tank component intercepts part of the catalyst flowing into the water body; the degassing reaction component aerates the supernatant fluid flowing in from the inclined plate sedimentation component and adjusts the pH value to be neutral; aiming at the water body flowing into the degassing reaction assembly, the high-efficiency catalyst separation assembly is used for carrying out floc separation through a coagulant aid and a flocculating agent; the biological aerated filter carries out biological oxidation degradation and filtration on the supernatant fluid flowing in from the high-efficiency catalyst separation component, and outputs the effluent water to the clean water tank. Through the technical scheme of the utility model, circulating heterogeneous light catalytic oxidation technology combines together with the bological aerated filter, utilizes light catalytic oxidation reaction, biological oxidation, bioadsorption and filters to handle sewage jointly, realizes that sewage quality of water promotes comprehensively, reaches new emission standard's requirement.
Description
Technical Field
The utility model relates to a pollution treatment technical field especially relates to a sewage advanced treatment composite set.
Background
In order to adapt to a series of municipal sewage plants and new industrial wastewater pollutant discharge standards to achieve standard wastewater discharge and reduce the influence on the environment of a receiving water body, the effluent after the existing biochemical treatment needs to be further deeply treated. Further comprehensively upgrading biochemical effluent, wherein important pollutants comprise COD (Chemical Oxygen Demand), ammonia nitrogen, total phosphorus, ss (suspended solids) and the like; for some pollutants which are difficult to be degraded biologically, advanced treatment is mostly carried out by adopting Fenton, ozone and other advanced oxidation technologies.
In the prior art, the Fenton oxidation technology usually needs to pre-acidify the sewage in the using process, the pH value of the reaction is controlled between 2 and 4, a large amount of alkali liquor needs to be consumed when the pH value is adjusted back after the reaction is finished, the adding of acid and alkali in the process greatly improves the system operation cost, in addition, the adding of acid and alkali can introduce partial soluble salt into a system, the salt content of effluent is improved, and the project application which has requirements on the salt content in the emission standard is limited.
On the basis, Fenton-like oxidation systems such as photo-Fenton are developed, the pH application range is effectively expanded, and the oxidation efficiency of the system is improved. The circulating heterogeneous photocatalytic oxidation technology is a Fenton-like photocatalytic oxidation system taking an iron-based nano material as a catalyst. By using the iron-based catalyst, the pH of the system reaction is increased to about 4-6.5, and meanwhile, the cyclic conversion of the catalyst and the utilization efficiency of the oxidant are realized through the catalytic action of ultraviolet light, the generation of hydroxyl radicals is promoted, the deep oxidation of organic matters is realized, COD is removed, and the biodegradability of sewage is improved.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides a sewage advanced treatment composite set, combine together with the bological aerated filter through circulating heterogeneous photo catalytic oxidation technology, get rid of partial COD through the photo catalytic oxidation reaction, can gradually decompose biological difficult degradation macromolecular pollutant in the system into the micromolecule simultaneously, improve sewage biodegradability, follow-up combination through with the bological aerated filter, high-efficient biological oxidation and filter material adsorption and filtering action through the bological aerated filter, to ammonia nitrogen in the water, total phosphorus and ss are further got rid of, thereby realize that sewage quality of water promotes comprehensively, reach new emission standard's requirement.
In order to realize the aim, the utility model provides a sewage advanced treatment combined device, which comprises a circulating heterogeneous photocatalytic oxidation component, an inclined plate sedimentation tank component, a degassing reaction component, a high-efficiency catalyst separation component, an aeration biological filter and a clean water tank which are connected in sequence through pipelines; the circulating heterogeneous photocatalytic oxidation component performs photocatalytic oxidation reaction on input sewage; the inclined plate sedimentation tank component intercepts part of the catalyst flowing into the water body; the degassing reaction component aerates the supernatant flowing in from the inclined plate sedimentation component and adjusts the pH value to be neutral; the high-efficiency catalyst separation component is used for carrying out floc separation on the water body flowing in from the degassing reaction component through a coagulant aid and a flocculating agent; the biological aerated filter carries out biological oxidation degradation and filtration on the supernatant fluid flowing in from the high-efficiency catalyst separation component, and outputs the effluent water to the clean water tank.
In the above technical scheme, preferably, the circulating heterogeneous photocatalytic oxidation assembly includes an ultraviolet light source system, a catalyst feeding device, an oxidant feeding device, a pH agent feeding device and a flow impeller, the ultraviolet light source system is a plurality of ultraviolet light assemblies vertically immersed, the catalyst feeding device is matched with an ultrasonic transducer to perform ultrasonic dispersion on the catalyst, the oxidant feeding device and the pH agent feeding device are respectively used for feeding the oxidant and the pH agent into the reaction tank, and the flow impeller is used for pushing sewage and the agent to be fully mixed and a water body to flow in the reaction tank in a circulating manner.
In the above technical solution, preferably, the circulating heterogeneous photocatalytic oxidation assembly further includes an online pH monitoring device and an ORP (oxidation-reduction potential) monitoring device, the online pH monitoring device is configured to monitor a pH value of a water body in the reaction tank, the ORP monitoring device is configured to monitor an oxidation-reduction potential of the water body in the reaction tank, and the dosage can be adjusted online according to the ORP value.
In the above technical solution, preferably, an inclined plate and a catalyst circulating pump are arranged in the inclined plate precipitation assembly, the inclined plate is used for intercepting the catalyst, one end of the catalyst circulating pump is communicated with the circulating heterogeneous photocatalytic oxidation assembly, and the other end of the catalyst circulating pump is communicated with a sludge discharge pipeline, and is used for refluxing part of the catalyst and the iron sludge to the circulating heterogeneous photocatalytic oxidation assembly.
In the above technical scheme, preferably, the degassing reaction assembly includes an aerator pipe, an air blower, an alkali liquor feeding device and an online pH monitoring control system, an air outlet of the air blower is communicated with the aerator pipe, the aerator pipe is used for carrying out aeration treatment on a water body, the alkali liquor feeding device is used for feeding alkali liquor to the water body to be neutral, the online pH monitoring control system is connected with the alkali liquor feeding device, and the feeding dosage of the alkali liquor feeding device is controlled according to a monitored pH value.
In the technical scheme, preferably, high efficiency catalyst separation subassembly includes coagulant aid charge device, flocculating agent charge device, mixer and middle pond, coagulant aid charge device and flocculating agent charge device are used for throwing coagulant aid and flocculating agent respectively, the mixer is used for with the coagulant aid the flocculating agent is stirred with the water, middle pond independently set up in the high efficiency catalyst separation subassembly, water passes through after carrying out the floc separation in the high efficiency catalyst separation subassembly middle water pond pump send extremely aeration biological filter.
In the above technical scheme, preferably, the biological aerated filter further includes a water inlet pump, a roots blower and a reverse water pump, the water inlet pump is used for pumping the water in the intermediate water tank to the biological aerated filter, the roots blower is used for delivering gas to the biological aerated filter to provide oxygen for the system to be used for microorganism growth, filter materials are filled in the biological aerated filter, the reverse water pump is used for pumping the water in the clean water tank to the biological aerated filter to perform backwashing on the filter materials, and the reverse washing water returns to the front-end secondary sedimentation tank through the drain pipe to perform secondary treatment.
Compared with the prior art, the beneficial effects of the utility model are that: through the combination of circulating heterogeneous photocatalytic oxidation process and the biological aerated filter, part of COD is removed through photocatalytic oxidation reaction, meanwhile, the biologically-nondegradable macromolecular pollutants in the system can be gradually decomposed into small molecules, the biodegradability of sewage is improved, and then through the combination with the biological aerated filter, ammonia nitrogen, total phosphorus and ss in a water body are further removed through the high-efficiency biological oxidation effect and the biological adsorption and filtration effect of the biological aerated filter, so that the comprehensive improvement of the sewage quality is realized, and the requirement of a new discharge standard is met.
Drawings
FIG. 1 is a schematic flow chart of a combined device for advanced wastewater treatment according to an embodiment of the present invention.
In the drawings, the correspondence between each component and the reference numeral is:
1. a circulating heterogeneous photocatalytic oxidation assembly; 11. a catalyst feeding device; 12. adding an oxidant into the packaging paper; 13. a pH medicament adding device; 2. an inclined plate sedimentation tank component; 21. a sloping plate; 3. a degassing reaction component; 4. a high efficiency catalyst separation assembly; 41. a coagulant aid adding device; 42. a flocculating agent adding device; 43. A blender; 44. a middle water tank; 5. an aeration biological filter; 6. a clean water tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the combined device for advanced wastewater treatment provided by the utility model comprises a circulating heterogeneous photocatalytic oxidation component 1, an inclined plate sedimentation tank component 2, a degassing reaction component 3, a high-efficiency catalyst separation component 4, a biological aerated filter 5 and a clean water tank 6 which are connected in sequence through pipelines; the circulating heterogeneous photocatalytic oxidation component 1 performs photocatalytic oxidation reaction on input sewage; the inclined plate sedimentation tank component 2 intercepts part of the catalyst flowing into the water body; the degassing reaction component 3 aerates the supernatant fluid flowing in from the inclined plate sedimentation component and adjusts the pH value to be neutral; aiming at the water body flowing into the degassing reaction component 3, the high-efficiency catalyst separation component 4 carries out floc separation through a coagulant aid and a flocculating agent; the biological aerated filter 5 performs biological oxidation degradation and filtration on the supernatant fluid flowing in from the high-efficiency catalyst separation component 4, and outputs the effluent water to a clean water tank 6.
In the embodiment, the biochemical municipal or industrial sewage is lifted to the circulating heterogeneous photocatalytic oxidation reaction device from the front end secondary sedimentation tank, acid, catalyst, oxidant and the like are added into the reaction tank to carry out photocatalytic reaction in a micro-acid environment, so that the oxidative degradation of organic matters difficult to degrade in water is realized, most COD is removed, and the B/C ratio of the wastewater is improved. The inclined plate sedimentation component intercepts most of catalyst carried in inflow sewage, supernatant flows into the degassing reaction component 3, the degassing reaction component 3 adjusts the pH value of a water body to be neutral by adding alkaline solution, the high-efficiency catalyst separation component 4 adds coagulant aid and flocculating agent at the front end, then floc separation is realized in a separation zone of the high-efficiency separation device to obtain supernatant, the supernatant is pumped to the aeration biological filter 5 at the rear end through an intermediate water tank 44, COD, ammonia nitrogen, total phosphorus and ss in the water are further removed through biological oxidation degradation and filtration in the aeration biological filter, and the removal of various pollution indexes of the sewage is realized.
In the above embodiment, preferably, the circulating heterogeneous photocatalytic oxidation assembly 1 includes an ultraviolet light source system, a catalyst adding device 11, an oxidant adding device, a pH agent adding device 13, and a flow impeller, the ultraviolet light source system is a plurality of ultraviolet light assemblies placed in a vertical immersion manner, the catalyst adding device 11 is matched with an ultrasonic transducer to perform ultrasonic dispersion on the catalyst, the oxidant adding device and the pH agent adding device 13 are respectively used for adding an oxidant and a pH agent into the reaction tank, and the flow impeller is used for pushing sewage and the agent to be fully mixed and a water body to flow in the reaction tank in a circulating manner.
In the circulating heterogeneous photocatalytic oxidation assembly 1, the water body is maintained in a slightly acidic environment by adding the acidic medicament, the catalyst is circularly converted under the interaction of the ultraviolet light and the iron-based catalyst to generate hydroxyl radicals, and meanwhile, the ultraviolet light can synergistically generate the hydroxyl radicals by photolysis of hydrogen peroxide, so that the multiplication of the hydroxyl radicals is realized, and the deep oxidation removal efficiency of pollutants in water is improved. Acid liquor is added into the circulating heterogeneous photocatalytic oxidation assembly 1, the pH value is controlled to be 4-6.5, and the pH value is higher than that of 2-4 of the traditional Fenton advanced oxidation reaction.
In the above embodiment, preferably, the circulating heterogeneous photocatalytic oxidation assembly 1 further comprises an online pH monitoring device and an ORP monitoring device, wherein the online pH monitoring device is used for monitoring the pH value of the water body in the reaction tank, and can link the dosing control of the pH agent, namely sulfuric acid, according to the pH value; the ORP monitoring device is used for monitoring the oxidation-reduction potential of a water body in the reaction tank, monitoring the oxidation-reduction potential change of a reaction process system, and adding drugs into the control system, thereby being beneficial to the control of the system.
In the above embodiment, preferably, the inclined plate sedimentation assembly is provided with an inclined plate 21 and a catalyst circulation pump, the inclined plate 21 is used for intercepting the catalyst, the aperture diameter of the inclined plate 21 is 60-100mm, the L is 1000mm, the installation angle is 60 °, and the material is UPVC or reinforced polyurethane or stainless steel. One end of the catalyst circulating pump is communicated with the circulating heterogeneous photocatalytic oxidation assembly 1, and the other end of the catalyst circulating pump is communicated with the sludge discharge pipeline and used for refluxing part of the catalyst to the circulating heterogeneous photocatalytic oxidation assembly 1 so as to supplement the catalyst and reduce the addition of the catalyst.
In the above embodiment, preferably, the degassing reaction assembly 3 includes an aeration pipe, an air blower, an alkali liquor feeding device and an online pH monitoring and controlling system, an air outlet of the air blower is communicated with the aeration pipe, the aeration pipe is used for carrying out aeration treatment on the water body, the alkali liquor feeding device is used for feeding alkali liquor to the water body to be neutral, the online pH monitoring and controlling system is connected with the alkali liquor feeding device, and the feeding dosage of the alkali liquor feeding device is controlled according to the monitored pH value. Preferably, the blower can be selected from a rotary blower and a Roots blower.
In the above embodiment, preferably, the high-efficiency catalyst separation assembly 4 includes a coagulant aid dosing device, a flocculant dosing device, a stirrer 43 and an intermediate water tank 44, the coagulant aid dosing device and the flocculant dosing device are disposed at the front end of the high-efficiency catalyst separation assembly 4 and are respectively used for dosing a coagulant aid and a flocculant, the stirrer 43 is used for stirring the coagulant aid, the flocculant and the water body, and the catalyst and the ss flocculate out under the action of the coagulant aid and the flocculant to realize mud-water separation and obtain a clear water body. The middle water tank 44 is independently arranged in the high-efficiency catalyst separation component 4, and water in the high-efficiency catalyst separation component 4 is pumped to the biological aerated filter 5 through the middle water tank 44 after being subjected to floc separation.
In the above embodiment, preferably, the biological aerated filter 5 further includes a water inlet pump, a roots blower and a reverse water pump, the water inlet pump is used for pumping the water body of the intermediate water tank 44 to the biological aerated filter 5, the roots blower is used for delivering gas to the biological aerated filter 5, the biological aerated filter 5 is filled with a ceramic filter material or a light filter material as a biological carrier, the biological filter material has a large specific surface area and a large porosity and is easy to adhere to a biological membrane, microorganisms in the biological aerated filter carry out metabolism by using nutrients in water, and COD, ammonia nitrogen, total phosphorus, ss and the like are reduced by the oxidative degradation of the microorganisms and the adsorption and filtration of the filter material, so that the effluent of the sewage reaches the standard; the aeration biological filter 5 has the advantages of fast film formation, difficult loss, larger biomass in unit volume, good treatment effect, greatly reduced floor area and ensured effluent quality reaching the standard. The aeration biological filter 5 is matched with air washing and water washing back washing equipment, ss and the like intercepted by a fallen biological membrane and a filter material are continuously increased along with the metabolism of the biological membrane in the operation process, the water level in the filter is increased, namely, the filter material needs to be back washed, the back washing water adopts the clean water temporarily stored in the clean water tank 6 as back washing water, and the back washing wastewater flows back to the front end secondary sedimentation tank through a drainage pipeline for secondary treatment.
The utility model also provides a sewage advanced treatment composite technology is applied to the sewage advanced treatment composite set who provides as in the above-mentioned embodiment, include: inputting the sewage into a circulating heterogeneous photocatalytic oxidation assembly 1, and carrying out photocatalytic oxidation reaction on the sewage by the circulating heterogeneous photocatalytic oxidation reaction assembly in a micro-acid environment; the water body after the reaction of the circulating heterogeneous photocatalytic oxidation reaction component is finished automatically flows into the inclined plate precipitation component to intercept the catalyst; the supernatant treated by the inclined plate precipitation component automatically flows into a degassing reaction component 3 for degassing, and the pH value is adjusted to be neutral; effluent treated by the degassing reaction component 3 automatically flows into the high-efficiency catalyst separation component 4, and flocculation separation is realized by adding coagulant aids and flocculants; the separated supernatant of the high-efficiency catalyst separation component 4 is pumped to the biological aerated filter 5 through the intermediate water tank 44, the water body is subjected to biological oxidation degradation and filtration, and the filtered effluent is conveyed to the clean water tank 6.
In the above embodiment, preferably, the circulating heterogeneous photocatalytic oxidation reaction assembly adds acid solution to the sewage to control the pH value to 4-6.5, adds iron-based catalyst and oxidant, and irradiates ultraviolet light. Wherein, the oxidant is hydrogen peroxide, the pH value in the reaction tank is controlled to be between 4 and 6.5 by adding acid liquor, the adding amount of the hydrogen peroxide is 30 to 100mg/L, and the adding amount of the catalyst is within the range of 50 to 200 mg/L. The waste water stays in the circulating heterogeneous photocatalytic oxidation reaction device for about 1h, wherein the illumination time is between 5 and 30min, and under the action of ultraviolet light and a catalyst, a large amount of hydroxyl radicals are generated to remove pollutants.
The water sample treated by the circulating heterogeneous photocatalytic oxidation reaction component automatically flows into the inclined plate sedimentation tank component 2 through an overflow port, the aperture of an inclined plate 21 in the inclined plate sedimentation component is 60-100mm, the included angle between the inclined plate 21 and the vertical direction is 60 degrees, the inclined plate 21 is made of UPVC (unplasticized polyvinyl chloride) or reinforced polyurethane or stainless steel, the intercepted catalyst periodically flows back into the circulating heterogeneous photocatalytic oxidation reaction component through a catalyst circulating pump, the cyclic utilization of the catalyst is realized, and the adding amount of the catalyst is greatly reduced.
Supernatant containing a small amount of ss in the inclined plate sedimentation tank component 2 overflows into the degassing reaction component 3, alkaline solution is added into the degassing reaction component 3 until the pH value of a water body is 6.5-7.0, coagulant aid and flocculating agent are added into the front end area of the high-efficiency catalyst separation component 4, the adding concentration of the coagulant aid is 0-100ppm, the adding concentration of the flocculating agent is 1-3ppm, after flocculation reaction, the ss and the catalyst in water are separated by the high-efficiency catalyst separation component, COD (chemical oxygen demand) of air flotation effluent can be reduced to about 70mg/L, and the ss can be reduced to 15 mg/L. The filter material in the biological aerated filter 5 is a ceramsite filter material or a high-molecular light filter material, and COD, ammonia nitrogen, total phosphorus, ss and other pollutants in water are further removed through the microbial oxidation degradation effect and the adsorption filtration effect of the filter material, so that the indexes of COD, ammonia nitrogen, ss and the like meet the requirement of external drainage. During operation, along with the metabolism of the biological membrane, the dropped biological membrane and the ss intercepted by the filter material are continuously increased, the water level in the filter tank is increased, namely the filter material is required to be backwashed, the backwashing water adopts the clean water temporarily stored in the clean water tank 6 as the backwashing water, and the backwashing wastewater flows back to the secondary sedimentation tank at the front end through the drainage pipeline for secondary treatment.
In the above embodiment, preferably, polyaluminium chloride is added into the high-efficiency catalyst separation component 4 as a coagulant aid at a concentration of 0-100ppm, and polyacrylamide is added as a flocculant at a concentration of 1-3 ppm; adding an alkaline solution into the degassing reaction component 3, wherein the alkaline solution is a sodium hydroxide solution or a calcium hydroxide solution; and the backwashing wastewater after backwashing the filter materials in the biological aerated filter 5 returns to the front-end secondary sedimentation tank through a drainage pipeline for secondary treatment.
According to the advanced wastewater treatment combination device and the advanced wastewater treatment process provided in the embodiments, the advanced wastewater treatment is performed after the biochemical treatment of the printing and dyeing wastewater, the device and the process provided by the utility model are utilized for treatment, and the indexes of inlet and outlet water of the wastewater to be treated are shown in the following table, which meet the requirements of new discharge standards.
| Parameter(s) | CODcr | Ammonia nitrogen | Total phosphorus | ss |
| Inflow (mg/L) | ≤100 | ＜1 | <0.5 | ≤30 |
| Water outlet (mg/L) | ≤50 | ＜0.5 | <0.5 | ≤10 |
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A sewage advanced treatment combination device is characterized by comprising a circulating heterogeneous photocatalytic oxidation component, an inclined plate sedimentation tank component, a degassing reaction component, a high-efficiency catalyst separation component, an aeration biological filter and a clean water tank which are sequentially connected through pipelines;
the circulating heterogeneous photocatalytic oxidation component performs photocatalytic oxidation reaction on input sewage;
the inclined plate sedimentation tank component intercepts part of the catalyst flowing into the water body;
the degassing reaction component aerates the supernatant flowing in from the inclined plate sedimentation component and adjusts the pH value to be neutral;
the high-efficiency catalyst separation component is used for carrying out floc separation on the water body flowing in from the degassing reaction component through a coagulant aid and a flocculating agent;
the biological aerated filter carries out biological oxidation degradation and filtration on the supernatant fluid flowing in from the high-efficiency catalyst separation component, and outputs the effluent water to the clean water tank.
2. The sewage advanced treatment combination device according to claim 1, wherein the circulating heterogeneous photocatalytic oxidation assembly comprises an ultraviolet light source system, a catalyst adding device, an oxidant adding device, a pH agent adding device and a flow impeller, the ultraviolet light source system is a plurality of ultraviolet light assemblies which are vertically immersed, the catalyst adding device is matched with an ultrasonic transducer to carry out ultrasonic dispersion on the catalyst, the oxidant adding device and the pH agent adding device are respectively used for adding an oxidant and a pH agent into the reaction tank, and the flow impeller is used for pushing sewage and the agent to be fully mixed and a water body to circularly flow in the reaction tank.
3. The combined advanced wastewater treatment plant according to claim 2, wherein the circulating heterogeneous photocatalytic oxidation assembly further comprises an online pH monitoring device for monitoring the pH value of the water body in the reaction tank and an ORP monitoring device for monitoring the oxidation-reduction potential of the water body in the reaction tank.
4. The sewage deep treatment combination device of claim 1, wherein the inclined plate precipitation assembly is provided therein with an inclined plate and a catalyst circulating pump, the inclined plate is used for intercepting catalyst, one end of the catalyst circulating pump is communicated with the circulating heterogeneous photocatalytic oxidation assembly, and the other end is communicated with a sludge discharge pipeline, and is used for returning part of the catalyst to the circulating heterogeneous photocatalytic oxidation assembly.
5. The sewage advanced treatment combination device according to claim 1, wherein the degassing reaction component comprises an aeration pipe, an air blower, an alkali liquor feeding device and an online pH monitoring control system, an air outlet of the air blower is communicated with the aeration pipe, the aeration pipe is used for carrying out aeration treatment on a water body, the alkali liquor feeding device is used for feeding alkali liquor to the water body to be neutral, the online pH monitoring control system is connected with the alkali liquor feeding device, and the feeding dosage of the alkali liquor feeding device is controlled according to the monitored pH value.
6. The sewage deep treatment combination device according to claim 1, wherein the high-efficiency catalyst separation assembly comprises a coagulant aid dosing device, a flocculant dosing device, a stirrer and an intermediate water tank, the coagulant aid dosing device and the flocculant dosing device are respectively used for dosing a coagulant aid and a flocculant, the stirrer is used for stirring the coagulant aid, the flocculant and a water body, the intermediate water tank is independently arranged in the high-efficiency catalyst separation assembly, and the water body in the high-efficiency catalyst separation assembly is pumped to the biological aerated filter tank through the intermediate water tank after floc separation.
7. The combined device for advanced wastewater treatment according to claim 6, wherein the biological aerated filter further comprises a water inlet pump, a Roots blower and a backwash water pump, the water inlet pump is used for pumping the water in the intermediate water tank to the biological aerated filter, the Roots blower is used for conveying gas to the biological aerated filter to provide oxygen for the system for microorganisms, the biological aerated filter is filled with filter materials, the backwash water pump is used for pumping the water in the clean water tank to the biological aerated filter to backwash the filter materials, and the backwash water returns to the front end secondary sedimentation tank through a drain pipe to perform secondary treatment.
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