CN108178300B - Automatic high-efficient nitrogen and phosphorus removal device of integration MBR method - Google Patents
Automatic high-efficient nitrogen and phosphorus removal device of integration MBR method Download PDFInfo
- Publication number
- CN108178300B CN108178300B CN201711344700.2A CN201711344700A CN108178300B CN 108178300 B CN108178300 B CN 108178300B CN 201711344700 A CN201711344700 A CN 201711344700A CN 108178300 B CN108178300 B CN 108178300B
- Authority
- CN
- China
- Prior art keywords
- tank
- aerobic tank
- anoxic tank
- water
- membrane bioreactor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
Abstract
The invention relates to an automatic integrated MBR (membrane bioreactor) method high-efficiency nitrogen and phosphorus removal device, which comprises a membrane bioreactor, wherein the membrane bioreactor is divided into an aerobic tank part and an anoxic tank part by a partition plate, the aerobic tank is positioned in the middle of the anoxic tank, and the bottoms of the aerobic tank and the anoxic tank are communicated with each other; a hollow fiber membrane component is arranged in the aerobic tank, and a water outlet pipeline is arranged at the upper part of the hollow fiber membrane component; an aeration system is arranged below the aerobic tank to realize that the mud-water mixed liquid in the aerobic tank flows back into the anoxic tank from two sides of the upper part from bottom to top; the left side and the right side of the membrane bioreactor are both provided with water inlet pipelines and are communicated with the anoxic tank through water inlets; sponge iron net bags are arranged on the inner wall of the aerobic tank and the inner wall of the anoxic tank; the lower part of the membrane bioreactor is provided with a sludge discharge pipe. Solves the problems of higher cost, higher energy consumption, large occupied area, large amount of excess sludge, difficult realization of automatic control and the like of the existing urban domestic sewage treatment method.
Description
Technical Field
The invention relates to an automatic integrated MBR (membrane bioreactor) method device for efficiently removing nitrogen and phosphorus (total nitrogen removal rate is 62-65%, total phosphorus removal rate is 83-85%), belongs to the technical field of sewage treatment devices, and particularly relates to a novel device for efficiently removing nitrogen and phosphorus in urban domestic sewage.
Background
In recent years, with the economic development of China and the improvement of the living standard of people, the content of nitrogen and phosphorus in urban domestic sewage is obviously increased, the treatment load of a sewage treatment plant is increased, and the sewage treatment cost is increased; in addition, the content of organic carbon sources determining the nitrogen and phosphorus removal effect in domestic sewage is generally insufficient, so that the removal effect of a secondary biochemical treatment process determining the overall treatment effect of a sewage treatment plant is not ideal, and the problem of overproof nitrogen and phosphorus content in effluent generally exists. And the effluent containing higher concentration of nitrogen and phosphorus can cause the eutrophication problem of rivers after being discharged into the water body, and the eutrophication can further cause the black and stink water body.
The two main types of secondary biochemical treatment processes of the traditional municipal sewage treatment plant are an activated sludge method and a biofilm method. In order to meet the increasingly strict discharge requirements of China and to perform enhanced nitrogen and phosphorus removal, a sewage treatment plant generally adopts a method of adding filler into a biochemical treatment process, and forms a biological film on the surface of the filler by utilizing the characteristic of large specific surface area of the filler so as to fix biomass, namely an activated sludge method and a biological film method. The method for improving the treatment effect by simply increasing the biomass mainly depends on the amount and the type of the added filler, and the method for improving the treatment effect by simply increasing the biomass not only has limited improvement on the removal effect, but also inevitably changes the process operation parameters, for example, the reflux ratio of mixed liquid entering an anoxic tank from an aerobic tank is increased by a reflux pump, and the like, so that the operation cost of sewage treatment is increased, and the problems of large floor area, large amount of residual sludge and the like are not fundamentally solved. Therefore, it is very important to provide a new high-efficiency city domestic sewage treatment device.
Disclosure of Invention
In order to solve the technical problems, the invention provides a novel high-efficiency urban domestic sewage treatment device to solve the problems of high cost, high energy consumption, large occupied area, large amount of residual sludge, difficulty in realizing automatic control and the like of the conventional urban domestic sewage treatment method.
In order to solve the technical problems, the invention adopts the technical scheme that: an automatic integrated MBR method high-efficiency denitrification and dephosphorization device comprises a membrane bioreactor, wherein the membrane bioreactor is divided into an aerobic tank part and an anoxic tank part by a partition plate, the aerobic tank is positioned in the middle of the anoxic tank, and the bottoms of the aerobic tank and the anoxic tank are communicated with each other; a hollow fiber membrane component is arranged in the aerobic tank, and a water outlet pipeline is arranged at the upper part of the hollow fiber membrane component; an aeration system is arranged below the aerobic tank to realize that the sludge-water mixed liquor in the aerobic tank flows back into the anoxic tank from two sides of the upper part of the aerobic tank from bottom to top; the left side and the right side of the membrane bioreactor are both provided with water inlet pipelines and are communicated with the anoxic tank through water inlets; sponge iron net bags are arranged on the inner wall of the aerobic tank and the inner wall of the anoxic tank; the lower part of the membrane bioreactor is provided with a sludge discharge pipe.
By adopting the structure, the specific working process is as follows: raw water enters an anoxic tank from water inlet pipes at two sides of a device body, denitrifying bacteria in activated sludge (the sludge concentration is 2000 mg/L-6500 mg/L) in the anoxic tank take organic matters as carbon sources, and NO in the water is treated3 -Reduction of-N to N2NO, and Fe released from Sponge Iron (SI)2+With NO3 -Redox reaction of N, Fe2+Adding NO3 -Reduction of-N to N2With simultaneous generation of Fe3+Thereby accelerating NO3 -Reducing N to achieve the purpose of removing total nitrogen in an enhanced manner; then the mixed liquid in the anoxic tank enters the aerobic tank from the bottom under the action of gravity flow from top to bottom, and nitrobacteria in the activated sludge (the sludge concentration is 2000 mg/L-6500 mg/L) in the aerobic tank oxidize ammonia nitrogen in the water into NO2 --N and NO3 -N and Fe released from SI under aerobic conditions2+Is oxidized into Fe3+Will generate a certain amount of H2O2Strong oxides such as active oxygen, hydroxyl free radicals and superoxide can further enhance the degradation of organic matters in the MBR. Additionally produced Fe3+Can produce chemical flocculation and precipitation with the phosphorus in the aquatic, in sinking the active sludge of MBR system with the form of iron phosphate deposit, realize the high-efficient of phosphorus from aquatic getting rid of through regularly arranging mud. Because the specific surface area of the SI is large, the activated sludge in the device system can be attached to the surface of the SI to generate a biological film, and the removal effect and the impact load resistance of the system can be further improved. In addition, the iron element is an essential trace element in the microorganism body, and iron ions can become an electron acceptor for oxidizing cytochrome, so that the activity of various enzymes in the microorganism can be enhanced, the activity of activated sludge is enhanced, and the biochemical treatment effect is enhanced. In addition, the bottom aeration system can push the sludge-water mixed liquor in the aerobic tank from bottom to top, and the sludge-water mixed liquor flows back to the anoxic tank from two sides of the upper part to supplement organic carbon source and NO required by denitrification3 -An N electron donor to further improve the denitrification effect. Finally, the treated water passes through the hollow fiber membrane component from the middle aerobic tank under the vacuumizing action of the water outlet pump, sludge is trapped in the reactor by utilizing the high-efficiency trapping action of the membrane component, and the treated clear water is discharged from the water outlet pipeline at the upper part. In addition, the membrane module is cleaned by adopting the combination of the ultrasonic action generated by an ultrasonic generator arranged at the bottom and the high-pressure back-flushing hydraulic scouring action generated by a back-flushing pipe at the bottom.
The device of the invention has the advantages that: firstly, a combined integrated anoxic sponge iron-aerobic-MBR system is adopted, so that the construction of a primary sedimentation tank and a secondary sedimentation tank is reduced, the floor area of the device is greatly reduced, and the capital construction cost is saved; secondly, the device feeds water from two sides and discharges water from the middle, compared with the traditional A/O activated sludge process which feeds water from one side and discharges water from the other side, the denitrification efficiency is improved, the bottom aeration system of the middle aerobic tank is used for realizing the reflux from the aerobic tank to the anoxic tank, and the part of energy consumption of the traditional A/O activated sludge process which realizes the reflux from the aerobic tank to the anoxic tank by using a reflux pump is saved; thirdly, the traditional A/O activated sludge method is combined with an MBR process, so that the traditional A/O activated sludge method has good denitrification effect, and the defects of the traditional A/O activated sludge method in actual operation, such as large residual sludge amount, serious activated sludge loss, easy sludge floating in a secondary sedimentation tank, long start-up period and the like, are overcome; fourthly, the membrane component is washed by adopting the combined washing of the ultrasonic action generated by the ultrasonic generator arranged at the bottom and the high-pressure back-washing hydraulic flushing action generated by the back-washing pipe at the bottom, thereby ensuring the washing effect.
Preferably, the membrane aperture of the hollow fiber membrane is 0.01-0.1 μm; the pore size can intercept a large amount of antibiotic, hormone, humic acid and other high molecular organic matters which are difficult to biodegrade, and is beneficial to further improving the water quality purification effect.
Preferably, the sponge iron net bags on the inner wall of the aerobic tank and the inner wall of the anoxic tank are unequal in number; different amounts of SI are respectively added into the anoxic tank and the aerobic tank, so that the Fe can be released under the anoxic condition of the SI2+And release of Fe under aerobic conditions3 +Under the action of the oxidation-reduction reaction, nitrogen and phosphorus in the domestic sewage are removed in an enhanced manner, a biological film is attached to the surface of the SI with a large specific surface area, the biomass of effective organisms in the system is increased, iron trace elements are provided for microorganisms, the activity of the microorganisms is enhanced, the removal effect and the impact load resistance of the system can be further improved, the urban domestic sewage treatment mode of the device system integrates microbial degradation and physicochemical reaction, and the stability and the reliability of the removal effect are ensured.
Preferably, a back flushing pipe is arranged below the aeration system below the aerobic tank; the device can clean the aeration system in time, and ensures the good effect of the aeration system.
Preferably, an ultrasonic transducer is arranged in the membrane bioreactor and below the backwashing pipe, and can convert high-frequency electric energy into mechanical energy; the membrane bioreactor is correspondingly provided with an ultrasonic generator outside, and can convert electric energy into a high-frequency alternating current signal matched with the ultrasonic transducer to drive the ultrasonic transducer to work; the ultrasonic generator is arranged at the bottom of the membrane component, so that the uniform flushing effect of the ultrasonic membrane can be ensured.
Preferably, a water outlet pipeline arranged at the upper part of the hollow fiber membrane component is provided with a water quality online detection device; the structure can monitor the quality of the treated water in real time.
Preferably, the membrane bioreactor is also internally provided with a liquid level sensor, the water inlet pipeline is provided with a water inlet flow meter and a water inlet pump, and the water inlet flow meter and the water inlet pump of the liquid level sensor are electrically connected with a liquid level sensing control system, so that the real-time monitoring and water inlet amount control of the water level in the membrane bioreactor are realized.
Preferably, the total hydraulic retention time of the device is 8-24 h, wherein the hydraulic retention time of the anoxic tank and the aerobic tank is 2.0-7.0 h and 5.0-20.0 h respectively, and the volume ratio of the anoxic tank to the aerobic tank is 1: 1-1: 5; 3.0-5.0 mg/L of dissolved oxygen in the aerobic tank and 0.1-0.5 mg/L of dissolved oxygen in the anoxic tank; the sludge concentration is 3000 mg/L-5500 mg/L.
Preferably, in the running period, SI is respectively added into the anoxic tank and the aerobic tank, the adding amount is 10-35 g/L, and the main property indexes of the SI are as follows: the content of active iron is more than or equal to 90 percent, the diameter is 3-35 mm, and the specific surface area is more than or equal to 85g/cm3Volume weight less than or equal to 2.2g/cm3。
The invention realizes the full-process automatic control of sewage treatment of the device, membrane component backwashing and the like by adopting the PLC integrated system, improves the operation efficiency, and not only has strong pertinence to the treatment of urban domestic sewage by the system due to the combined integrated design, but also has good emergency treatment effect on sudden water pollution problems due to convenient transportation and operation conditions, and is easier to operate and popularize than other processes.
Drawings
FIG. 1 is a system sample diagram of the automatic integrated MBR method high-efficiency nitrogen and phosphorus removal device.
FIG. 2 is a sample internal configuration diagram of the membrane bioreactor as a core means of the present invention.
FIG. 3 is a schematic structural view of a hollow fiber flat-plate type membrane module of the device of the invention.
As shown in the figure: 1. is a water inlet pump; 2. is a gate valve; 3. is a water intake flow meter; 4. is a liquid level sensor; 5. is a membrane bioreactor; 6. is a hollow fiber flat plate type membrane component; 7. is an aeration pipe; 8. is a backwash pipe; 9. is a backwash water pump; 10. is a dredge pump; 11. is an ultrasonic transducer; 12. is a separator plate; 13. is a sponge iron net bag (sponge iron); 14. is a pressure gauge; 15. is water quality on-line monitoring equipment; 16. is a gas flow meter; 17. is an air compressor; 18. is a liquid level sensing control system; 19. is an electric control cabinet; 20. is a temperature measuring instrument; 21. is a mud valve; 22. is an ultrasonic generator; 23. is a water outlet flow meter; 24. is a water outlet pump; 25. is a water inlet pipe; 26. is a water inlet; 27. is a perforated uniform water distribution pipe; 28. is a sponge iron net bag hook; 29. is an aeration main pipe; 30. is a back-flushing main pipe; 31. is a back flush water outlet; 32. is a sludge discharge port; 33. is an emptying sludge discharge pipe; 34. is an aerobic tank; 35. an anoxic tank; 36. and (5) membrane silk.
The specific implementation mode is as follows:
the technical solution of the present invention is further described in detail with reference to specific examples.
As shown in fig. 1-3: the automatic integrated MBR method high-efficiency denitrification and dephosphorization device comprises a membrane bioreactor 5, wherein the membrane bioreactor 5 is divided into an aerobic tank part and an anoxic tank part by a partition plate 12, the aerobic tank 34 is positioned in the middle of the anoxic tank 35, and the bottoms of the aerobic tank and the anoxic tank are communicated with each other; a hollow fiber membrane component 6 is arranged in the aerobic tank, and a water outlet pipeline 6.1 is arranged at the upper part of the hollow fiber membrane component; an aeration system is arranged below the aerobic tank to realize that the mud-water mixed liquid in the aerobic tank flows from bottom to top and flows back to the anoxic tank from two sides of the upper part; the left side and the right side of the membrane bioreactor 5 are both provided with water inlet pipelines 25 and are communicated with the anoxic tank through water inlets 26; sponge iron net bags 13 are arranged on the inner wall of the aerobic tank and the inner wall of the anoxic tank; the lower part of the membrane bioreactor 5 is provided with a sludge discharge pipe 33 which is communicated with the sludge discharge pipe 33 through a sludge discharge port 32 arranged on the lower bottom surface of the membrane bioreactor 5 and provides sludge discharge power through a sludge discharge pump 10. The aeration system is composed of an aeration pipe 7, an aeration main pipe 29 and an air compressor 17, wherein the air compressor provides an aeration power source for the aeration pipe 7 through the aeration main pipe 29.
By adopting the structure, the specific working process is as follows: raw water enters an anoxic tank from water inlet pipes at two sides of the device body, denitrifying bacteria in the anoxic tank take organic matters as carbon sources to remove NO in the water3 -Reduction of-N to N2NO, and Fe released from Sponge Iron (SI)2+Will react with NO3 -Redox reaction of N, Fe2+Adding NO3 -Reduction of-N to N2With simultaneous generation of Fe3+Thereby accelerating NO3 -Reducing N to achieve the purpose of removing total nitrogen in an enhanced manner; then the mixed liquid in the anoxic tank flows into the aerobic tank from the bottom to the top by gravity, and nitrobacteria in the aerobic tank oxidize ammonia nitrogen in water into NO2 --N and NO3 -N and Fe released from SI under aerobic conditions2+Is oxidized into Fe3+Will generate a certain amount of H2O2And strong oxides such as active oxygen, hydroxyl free radicals and superoxide can catalyze the degradation of organic matters in the MBR. Additionally produced Fe3+Can produce chemical flocculation and precipitation with the phosphorus in the aquatic, in sinking the active sludge of MBR system with the form of iron phosphate deposit, realize the high-efficient of phosphorus from aquatic getting rid of through regularly arranging mud. Wherein, the SI surface with larger specific surface area can be also attached with a biological film, which can further improve the removal effect and the impact load resistance of the system. In addition, iron is an essential trace element in the microorganism, and iron ions can become electron acceptors for oxidizing cytochrome, so that the activity of various enzymes in the microorganism can be enhanced, and the activity of activated sludge can be enhancedThereby enhancing the biochemical treatment effect. In addition, the bottom aeration system can push the sludge-water mixed liquor in the aerobic tank from bottom to top, and the sludge-water mixed liquor flows back to the anoxic tank from two sides of the upper part to supplement organic carbon source and NO required by denitrification3 -An N electron donor to further improve the denitrification effect. Finally, the treated water passes through the hollow fiber membrane component from the middle aerobic tank, sludge is retained in the reactor by utilizing the high-efficiency retention effect of the membrane component, and the treated clear water is discharged from an upper water outlet pipeline.
The device of the invention has the advantages that: firstly, a combined integrated anoxic sponge iron-aerobic-MBR system is adopted, so that the construction of a primary sedimentation tank and a secondary sedimentation tank is reduced, the floor area of the device is greatly reduced, and the capital construction cost is saved; secondly, the device feeds water from two sides and discharges water from the middle, compared with the traditional A/O activated sludge process which feeds water from one side and discharges water from the other side, the denitrification efficiency is improved, the bottom aeration system of the middle aerobic tank is used for realizing the reflux from the aerobic tank to the anoxic tank, and the part of energy consumption of the traditional A/O activated sludge process which realizes the reflux from the aerobic tank to the anoxic tank by using a reflux pump is saved; thirdly, the traditional A/O activated sludge method is combined with an MBR process, so that the traditional A/O activated sludge method has good denitrification effect, and the defects of the traditional A/O activated sludge method in actual operation, such as large residual sludge amount, serious activated sludge loss, easy sludge floating in a secondary sedimentation tank, long start-up period and the like, are overcome; fourthly, the membrane module is washed by adopting the combined washing of the ultrasonic action generated by the ultrasonic generator arranged at the bottom and the high-pressure back-washing hydraulic flushing action generated by the back-washing pipe at the bottom, thereby ensuring the cleaning effect of the membrane module.
The membrane aperture of the hollow fiber membrane is 0.01-0.1 mu m; the pore size can intercept a large amount of antibiotics, hormones, humic acid and other high molecular organic matters which are difficult to biodegrade, and is beneficial to further improving the water quality purification effect.
The sponge iron net bags 13 on the inner wall of the aerobic tank and the inner wall of the anoxic tank are unequal in number, as shown in figure 1, the number in the anoxic tank is small, and the number in the aerobic tank is large; the sponge iron net bag is fixed on the inner wall of the aerobic tankAnd a sponge iron net bag hook 28 on the inner wall of the anoxic tank to realize fixation; different amounts of SI are respectively added into the anoxic tank and the aerobic tank, so that the Fe can be released under the anoxic condition of the SI2+And release of Fe under aerobic conditions3+Under the action of the oxidation-reduction reaction, nitrogen and phosphorus in the domestic sewage are removed in an enhanced manner, a biological film is attached to the surface of the SI with a large specific surface area, the biomass of effective organisms in the system is increased, iron trace elements are provided for microorganisms, the activity of the microorganisms is enhanced, the removal effect and the impact load resistance of the system can be further improved, the urban domestic sewage treatment mode of the device system integrates microbial degradation and physicochemical reaction, and the stability and the reliability of the removal effect are ensured.
As shown in attached figures 1-2, a back flushing pipe 8 is arranged below the aeration system below the aerobic tank, the back flushing pipe 8 is communicated with a back flushing main pipe 30, and a power source is provided by a back flushing water pump 9; the device can clean the aeration system in time, and ensures the good effect of the aeration system; the side wall of the membrane bioreactor 5 is provided with a back flush outlet 31 near the upper part to ensure that the back flush water for cleaning the membrane module is discharged from the back flush outlet.
As shown in attached figure 1, an ultrasonic transducer 11 is arranged in the membrane bioreactor 5 and below the back flushing pipe, and can convert high-frequency electric energy into mechanical energy; the membrane bioreactor is correspondingly provided with an ultrasonic generator 22 which can convert electric energy into a high-frequency alternating current signal matched with the ultrasonic transducer and drive the ultrasonic transducer to work; the ultrasonic generator is arranged at the bottom of the membrane component, so that the uniform flushing effect of the ultrasonic membrane can be ensured.
The water outlet pipeline arranged at the upper part of the hollow fiber membrane component is provided with a water quality online detection device 15 and a pressure gauge 14; by adopting the structure, the quality and the water pressure of the treated water can be monitored in real time.
The membrane bioreactor 5 is also internally provided with a liquid level sensor 4, the water inlet pipeline is provided with a water inlet flow meter 3 and a water inlet pump 1, and the water inlet flow meter and the water inlet pump of the liquid level sensor are electrically connected with a liquid level sensing control system, so that the real-time monitoring and water inlet quantity control of the water level in the membrane bioreactor 5 are realized; in addition, a temperature measuring instrument 20 can be arranged in the membrane bioreactor 5 to monitor the water temperature in real time.
The device of the invention can realize electrification and control by uniformly using the electric control cabinet 19 for various equipment or parts needing power supply.
The gate valves 2 are arranged on various pipelines, so that the flow of a medium is conveniently controlled; the water inlet pipe is also provided with a water inlet flowmeter, so that the medium flow can be conveniently measured;
the invention realizes the full-process automatic control of sewage treatment of the device, membrane component backwashing and the like by adopting the PLC integrated system, improves the operation efficiency, and not only has strong pertinence to the treatment of urban domestic sewage by the system due to the combined integrated design, but also has good emergency treatment effect on sudden water pollution problems due to convenient transportation and operation conditions, and is easier to operate and popularize than other processes.
The total hydraulic retention time of the device is 8-24 hours, wherein the hydraulic retention time of the anoxic tank and the aerobic tank is 2.0-7.0 hours and 5.0-20.0 hours respectively, and the volume ratio of the anoxic tank to the aerobic tank is 1: 1-1: 5; 3.0-5.0 mg/L of dissolved oxygen in the aerobic tank and 0.1-0.5 mg/L of dissolved oxygen in the anoxic tank; the sludge concentration is 3000 mg/L-5500 mg/L. In the operation period, respectively adding SI into an anoxic tank and an aerobic tank, wherein the adding amount is 10-35 g/L, and the main property indexes of the SI are as follows: the content of active iron is more than or equal to 90 percent, the diameter is 3-35 mm, and the specific surface area is more than or equal to 85g/cm3Volume weight less than or equal to 2.2g/cm3。
The device of the invention is applied to denitrification and dephosphorization treatment:
example 1
The automatic integrated MBR method high-efficiency nitrogen and phosphorus removal device adopted in the embodiment has the daily sewage treatment capacity of about 5.33m3The material is 316L type stainless steel, the immersed membrane bioreactor adopts a flat plate type hollow PVDF membrane component, the membrane aperture is 0.01 mu m, and the effective membrane area is 0.47m2The effective size L × B × H of the reactor is 3.2m × 1.0m × 1.6.6 m, the height is 0.2m, the volume is 4960L, and the anoxic pond and the aerobic pond are in the same volumeThe volume ratio is 2:3, wherein the volume of the anoxic tank is 1980L, and the volume of the aerobic tank is 2980L. The operation condition is that the total hydraulic retention time is 14h, wherein the hydraulic retention time of the anoxic tank and the aerobic tank is 5.6h and 8.4h respectively, the sludge age is 60d, the sludge concentration is 4000mg/L, the Dissolved Oxygen (DO) of the aerobic tank is 4.0mg/L, the DO of the anoxic tank is 0.5mg/L, the dosage of the anoxic tank of SI is 15g/L, and the dosage of the aerobic tank is 25 g/L.
The quality of the municipal domestic sewage is shown in Table 1.
TABLE 1 raw Water quality (unit: mg/L)
After about 25 days of sludge film formation and debugging operation, CODCrThe removal rate is stable and can be kept between 85 percent and 92 percent, and the COD of the effluent waterCrThe concentration is about 35 mg/L; the ammonia nitrogen removal effect is good and stable, the removal rate can be kept between 90% and 97%, and the ammonia nitrogen concentration of the effluent is about 0.5 mg/L; the total nitrogen removal rate is about 65 percent, the effluent is about 13mg/L, and the effluent still has a descending trend in later operation; the total phosphorus removal rate is about 85 percent, the effluent is about 0.4mg/L, and the tendency of decline is still existed in the later operation.
The device treats urban domestic sewage, and compared with the traditional A/O-MBR with equal volume of active carbon added under the same working condition, the treated effluent concentration is shown in Table 2.
TABLE 2 quality of treated effluent (unit: mg/L)
Various water quality indexes of effluent treated by the device are obviously superior to those of an active carbon process of adding equal volume in the traditional A/O-MBR, and the effluent reaches the first-class A standard of pollutant discharge Standard of urban Sewage treatment plant (GB 18918-2002).
Example 2
The automatic integrated MBR method high-efficiency nitrogen and phosphorus removal device adopted in the embodiment has the daily sewage treatment capacity of about 1.56m3The material is 316L type stainless steel, the immersed membrane bioreactor adopts a flat plate type hollow PVDF membrane component, the membrane aperture is 0.05 μm, and the effective membrane area is 0.36m2The effective size L × B × H of the reactor is 1.5m × 0.6m × 0.8.8 m, the height is 0.2m, the volume is 720L, the volume ratio of the anoxic tank to the aerobic tank is 1:2, wherein the volume of the anoxic zone is 240L, the volume of the aerobic zone is 480L, the operation condition is that the total hydraulic retention time is 10H, wherein the hydraulic retention time of the anoxic tank and the aerobic tank is 3.3H and 6.7H respectively, the sludge age is 80d, the sludge concentration is 4500mg/L, the Dissolved Oxygen (DO) of the aerobic tank is 4.0mg/L, the DO of the anoxic tank is 0.3mg/L, the dosage of the anoxic tank of SI is 10g/L, and the dosage of the aerobic tank is 20 g/L.
The quality of the municipal domestic sewage is shown in Table 3.
TABLE 3 City domestic wastewater quality (unit: mg/L)
The urban domestic sewage quality C: N: P is lower than 100:5:1, and belongs to the water quality with low C/N ratio and low C/P ratio. After about 23 days of sludge film formation and debugging operation, CODCrThe removal rate is stable and can be kept between 85 percent and 90 percent, and the effluent concentration is about 28 mg/L; the ammonia nitrogen removal effect is good and stable, the removal rate is kept between 90% and 95%, and the effluent concentration is about 0.8 mg/L; the total nitrogen removal rate is close to 62 percent, the yielding water is about 14.3mg/L, and the tendency of decline is still existed in the later operation; the total phosphorus removal rate is nearly 83 percent, the effluent is about 0.42mg/L, and the tendency of decline is still existed in the later operation.
The device treats urban domestic sewage with insufficient carbon source, and the treated sewage concentration is shown in a table 4 by comparing the urban domestic sewage with the traditional A/O-MBR under the same working condition.
TABLE 4 effluent quality after treatment (unit: mg/L)
The device is obviously superior to the traditional A/O-MBR process in various water quality indexes of the effluent after the treatment of the urban domestic sewage with insufficient carbon source, and the effluent reaches the first-class A standard of pollutant discharge Standard of urban sewage treatment plant (GB 18918-2002).
According to the embodiment 1 and 2, the treatment effects of the automatic integrated MBR method high-efficiency nitrogen and phosphorus removal device with different treatment amounts on nitrogen, phosphorus and organic pollutants in urban domestic sewage are better than those of the traditional process, the effluent water reaches the first-class A standard of pollutant discharge Standard of urban Sewage treatment plant (GB18918-2002), and the automatic integrated MBR method high-efficiency nitrogen and phosphorus removal device has a good removal effect on the nitrogen, phosphorus and organic pollutants in the urban domestic sewage.
Claims (9)
1. The utility model provides an automatic high-efficient nitrogen and phosphorus removal device of integration MBR method which characterized in that: the device comprises a membrane bioreactor, wherein the membrane bioreactor is divided into an aerobic tank part and an anoxic tank part by a partition plate, the aerobic tank is positioned in the middle of the anoxic tank, and the bottoms of the aerobic tank and the anoxic tank are communicated with each other; a hollow fiber membrane component is arranged in the aerobic tank, and a water outlet pipeline is arranged at the upper part of the hollow fiber membrane component; an aeration device is arranged below the aerobic tank to realize that the sludge-water mixed liquor in the aerobic tank flows back into the anoxic tank from two sides of the upper part of the aerobic tank from bottom to top; the left side and the right side of the membrane bioreactor are both provided with water inlet pipelines and are communicated with the anoxic tank through water inlets; sponge iron net bags are arranged on the inner wall of the aerobic tank and the inner wall of the anoxic tank; the lower part of the membrane bioreactor is provided with a sludge discharge pipe, and the membrane aperture of the hollow fiber membrane is 0.01-0.1 mu m;
the aeration device consists of an aeration pipe, an aeration main pipe and an air compressor, and the air compressor provides an aeration power source for the aeration pipe through the aeration main pipe.
2. The automatic integrated MBR method high-efficiency nitrogen and phosphorus removal device of claim 1, which is characterized in that: the number of the sponge iron net bags on the inner wall of the aerobic tank and the inner wall of the anoxic tank is unequal.
3. The automatic integrated MBR method high-efficiency nitrogen and phosphorus removal device of claim 1, which is characterized in that: a back flushing pipe is arranged below the aeration device below the aerobic tank.
4. The automatic integrated MBR method high-efficiency nitrogen and phosphorus removal device of claim 1, which is characterized in that: an ultrasonic transducer is arranged in the membrane bioreactor below the backwashing pipe, and an ultrasonic generator is correspondingly arranged outside the membrane bioreactor.
5. The automatic integrated MBR method high-efficiency nitrogen and phosphorus removal device of claim 1, which is characterized in that: and a water outlet pipeline arranged at the upper part of the hollow fiber membrane component is provided with a water quality online detection device.
6. The automatic integrated MBR method high-efficiency nitrogen and phosphorus removal device of claim 1, which is characterized in that: the membrane bioreactor is internally provided with a liquid level sensor, the water inlet pipeline is provided with a water inlet flow meter and a water inlet pump, and the water inlet flow meter and the water inlet pump of the liquid level sensor are electrically connected with a liquid level sensing control system, so that the real-time monitoring of the water level in the membrane bioreactor and the control of the water inlet quantity are realized.
7. The automatic integrated MBR method high-efficiency nitrogen and phosphorus removal device of claim 1, which is characterized in that: the total hydraulic retention time of the device is 8-24 h, wherein the hydraulic retention time of the anoxic tank and the hydraulic retention time of the aerobic tank are respectively 2.0-7.0 h and 5.0-20.0 h, and the volume ratio of the anoxic tank to the aerobic tank is 1: 1-1: 5; 3.0-5.0 mg/L of dissolved oxygen in the aerobic tank and 0.1-0.5 mg/L of dissolved oxygen in the anoxic tank; the sludge concentration is 3000 mg/L-6500 mg/L.
8. The automatic integrated MBR method high-efficiency nitrogen and phosphorus removal device of claim 1, which is characterized in that: and in the running period, respectively adding SI into the anoxic tank and the aerobic tank, wherein the adding amount is 10-35 g/L.
9. The automatic integrated MBR method high-efficiency nitrogen and phosphorus removal device of claim 8, wherein: the property indexes of the SI are as follows: the content of active iron is more than or equal to 90 percent, the diameter is 3-35 mm, and the specific surface area is more than or equal to 85g/cm3Volume weight less than or equal to 2.2g/cm3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711344700.2A CN108178300B (en) | 2017-12-15 | 2017-12-15 | Automatic high-efficient nitrogen and phosphorus removal device of integration MBR method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711344700.2A CN108178300B (en) | 2017-12-15 | 2017-12-15 | Automatic high-efficient nitrogen and phosphorus removal device of integration MBR method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108178300A CN108178300A (en) | 2018-06-19 |
| CN108178300B true CN108178300B (en) | 2020-09-15 |
Family
ID=62546085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711344700.2A Active CN108178300B (en) | 2017-12-15 | 2017-12-15 | Automatic high-efficient nitrogen and phosphorus removal device of integration MBR method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108178300B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109701499B (en) * | 2019-02-14 | 2020-01-17 | 浙江泽林瑞沃环境科技有限公司 | Nitrogen and phosphorus removal wastewater treatment method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103613195A (en) * | 2013-11-25 | 2014-03-05 | 北京化工大学 | Integrated MBR (Membrane Bio-Reactor) |
| CN204454732U (en) * | 2015-02-02 | 2015-07-08 | 广东东日环保有限公司 | The integral type film biological reactor of process high concentrated organic wastewater |
| CN204939074U (en) * | 2015-09-14 | 2016-01-06 | 甘肃新天亿环保工程有限公司 | Multiple integration water treatment device |
| CN106064851A (en) * | 2016-06-24 | 2016-11-02 | 浙江大学宁波理工学院 | A kind of MLE MBR method efficiently processes marine culture wastewater device and method |
| CN106865760A (en) * | 2017-03-15 | 2017-06-20 | 东北电力大学 | The technique of the filler-reinforced anaerobic ammonia oxidation reactor denitrification efficiency of sponge iron |
-
2017
- 2017-12-15 CN CN201711344700.2A patent/CN108178300B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103613195A (en) * | 2013-11-25 | 2014-03-05 | 北京化工大学 | Integrated MBR (Membrane Bio-Reactor) |
| CN204454732U (en) * | 2015-02-02 | 2015-07-08 | 广东东日环保有限公司 | The integral type film biological reactor of process high concentrated organic wastewater |
| CN204939074U (en) * | 2015-09-14 | 2016-01-06 | 甘肃新天亿环保工程有限公司 | Multiple integration water treatment device |
| CN106064851A (en) * | 2016-06-24 | 2016-11-02 | 浙江大学宁波理工学院 | A kind of MLE MBR method efficiently processes marine culture wastewater device and method |
| CN106865760A (en) * | 2017-03-15 | 2017-06-20 | 东北电力大学 | The technique of the filler-reinforced anaerobic ammonia oxidation reactor denitrification efficiency of sponge iron |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108178300A (en) | 2018-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112851026B (en) | High-concentration degradation-resistant organic wastewater system and treatment process thereof | |
| CN110028155B (en) | Anaerobic ammonia oxidation coupling sulfur autotrophic denitrification device and wastewater treatment method | |
| CN201932982U (en) | Combined system using micro-electrolysis-MBR (membrane bio-reactor) combined technology to treat printing and dyeing wastewater | |
| CN111056698A (en) | Wastewater treatment process of multistage biological contact oxidation method | |
| CN113003866A (en) | AO + facultative MBR membrane integral type sewage treatment device | |
| CN112010507A (en) | Household domestic sewage treatment device | |
| CN101693576B (en) | Technology for rapidly treating domestic sewage discharged without residual mud by second-stage adsorption | |
| CN201614333U (en) | Decentralized sewage treatment device | |
| CN106007267A (en) | Large integrated sewage treatment device and sewage treatment technology | |
| CN108178300B (en) | Automatic high-efficient nitrogen and phosphorus removal device of integration MBR method | |
| CN211595374U (en) | Sewage treatment equipment combining suspended biological membrane with deep filtration | |
| CN109231673B (en) | A/O combined micro-electric field-Fe/C reinforced dephosphorization device and application thereof | |
| CN208430000U (en) | A kind of Combined industry sewage treatment experimental real-training apparatus | |
| CN105502660A (en) | Reverse-flow type biological contact device | |
| CN205856266U (en) | Large-scale integrated sewage treating apparatus | |
| CN109607787A (en) | A kind of high strength domestic sewage processing unit and method | |
| CN213865851U (en) | Domestic sewage treatment station | |
| CN213950897U (en) | Integrated sewage treatment equipment | |
| CN212269816U (en) | Aged landfill leachate non-concentrated solution treatment system | |
| CN205347127U (en) | A2O -MBR integrative sewage treatment device | |
| CN209113690U (en) | Country sewage integrated equipment for wastewater treatment | |
| CN210394072U (en) | Intelligent integrated treatment equipment for domestic sewage in expressway service area | |
| CN209619000U (en) | A kind of high strength domestic sewage processing unit | |
| CN208218511U (en) | The processing unit of high-concentration sewage | |
| CN111960616A (en) | Non-concentrated liquid treatment system and method for aged landfill leachate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |