CN108178300A - Automatic integratedization MBR method high-efficient denitrification and dephosphorization devices - Google Patents

Automatic integratedization MBR method high-efficient denitrification and dephosphorization devices Download PDF

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CN108178300A
CN108178300A CN201711344700.2A CN201711344700A CN108178300A CN 108178300 A CN108178300 A CN 108178300A CN 201711344700 A CN201711344700 A CN 201711344700A CN 108178300 A CN108178300 A CN 108178300A
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aerobic tank
anoxic pond
efficient denitrification
membrane bioreactor
mbr
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CN108178300B (en
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张会宁
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Ningbo Institute of Technology of ZJU
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Ningbo Institute of Technology of ZJU
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • 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]

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

One kind automatic integratedization MBR method high-efficient denitrification and dephosphorization devices of the invention, including membrane bioreactor, membrane bioreactor is divided into aerobic tank part and anoxic pond part by partition board, and aerobic tank is located at the middle part of anoxic pond, and the bottom of aerobic tank and anoxic pond is interconnected；Hollow fiber film assembly is provided in the aerobic tank, the top of hollow fiber film assembly is provided with outlet conduit；Gas explosion system is provided with below the aerobic tank, with realize the muddy water mixed solution in aerobic tank from bottom to top plug-flow, from top both sides flow back into anoxic pond；Inlet channel is both provided at left and right sides of the membrane bioreactor and passes through water inlet and is connected with anoxic pond；The sponge iron string bag is both provided on the aerobic tank inner wall and anoxic pond inner wall；The membrane bioreactor lower part is provided with sludge pipe.Solve the problems such as existing city domestic sewage processing method cost is higher, energy consumption is higher, take up a large area, surplus sludge volume is more and is not easy to realize automation control.

Description

Automatic integratedization MBR method high-efficient denitrification and dephosphorization devices
Technical field
The present invention relates to a kind of automatic integratedization MBR (also known as membrane bioreactor) method high-efficient denitrification and dephosphorization, (total nitrogen removes Rate 62-65%, total tp removal rate 83-85%) device, belong to sewage-treatment plant technical field more particularly to a kind of novel height The device of nitrogen phosphorus in effect removal city domestic sewage.
Background technology
In recent years, as China's economic development and living standards of the people improve, nitrogen and phosphorus content is apparent in city domestic sewage Increase, aggravated the processing load of sewage treatment plant, increased cost of sewage disposal；In addition nitrogen phosphorus ligands are determined in sanitary sewage The organic carbon source content of effect is generally insufficient, causes with the secondary biochemical treatment work for determining sewage treatment plant's disposed of in its entirety effect Skill removal effect is undesirable, is discharged generally existing nitrogen and phosphorus content excessive problem.And the water outlet of the phosphorus of nitrogen containing higher concentration is discharged into water body After can cause river eutrophication problem, eutrophication aggravation can further cause black and odorous water.
There are mainly two types of traditional municipal sewage plant's secondary biochemical treatment techniques, i.e. activated sludge process and biomembrane Method.The emission request increasingly strict to meet country, carries out intensified denitrification and dephosphorization, and sewage treatment plant is generally used to biochemical treatment The method that filler is added in technique, using packing specific area it is big the characteristics of, be formed on its surface biomembrane to fix biomass, That is activated sludge process+biofilm.The raising of this method effect depends on simple filler and adds several amount and type, and this To improve the method for the treatment of effect, not only removal effect raising is limited, and Process operating parameters by simple increase biomass for kind It necessarily changes correspondingly, for example the return current ratio of the mixed liquid etc. that aerobic tank enters anoxic pond is increased by reflux pump, not only increase in this way The operating cost of sewage disposal, and take up a large area, the problems such as surplus sludge volume is more, does not solve from basic.Therefore, it carries Seem extremely important for a kind of new and effective municipal domestic sewage treatment device.
Invention content
In order to solve the above technical problem, the present invention provides a kind of new and effective municipal domestic sewage treatment devices to solve Existing city domestic sewage processing method cost is higher, energy consumption is higher, take up a large area, surplus sludge volume is more and is not easy reality The problems such as existing automation control.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of automatic integratedization MBR methods efficiently take off Nitrogen dephosphorization apparatus, the device include membrane bioreactor, the membrane bioreactor by partition board be divided into aerobic tank part and Anoxic pond part, the aerobic tank are located at the middle part of anoxic pond, and the bottom of aerobic tank and anoxic pond is interconnected；Described Hollow fiber film assembly is provided in aerobic tank, the top of hollow fiber film assembly is provided with outlet conduit；The aerobic tank Lower section be provided with aerating system, with realize the muddy water mixed solution in aerobic tank from bottom to top plug-flow, flow back into from top both sides Enter anoxic pond；Inlet channel is both provided at left and right sides of the membrane bioreactor and passes through water inlet and is connected with anoxic pond It is logical；The sponge iron string bag is both provided on the aerobic tank inner wall and anoxic pond inner wall；The membrane bioreactor lower part is set It is equipped with sludge pipe.
Using the above structure, the specific course of work is as follows：The water inlet pipe of raw water from device body both sides enters anoxic pond, Denitrifying bacterium in anoxic pond in activated sludge (sludge concentration is 2000mg/L~6500mg/L), will using organic matter as carbon source NO in water3 -- N is reduced into N2, the gases such as NO, and the Fe discharged by sponge iron (SI)2+With NO3 -Redox reaction occurs for-N, Fe2+By NO3 -- N is reduced to N2Generate Fe simultaneously3+, so as to accelerate NO3 -The reduction of-N achievees the purpose that strengthen removal total nitrogen；So The gravity stream effect from top to bottom of the mixed liquor in anoxic pond enters aerobic tank from bottom afterwards, the activated sludge (sludge in aerobic tank A concentration of 2000mg/L~6500mg/L) in nitrifier by the ammonium oxidation in water into NO2 -- N and NO3 -- N, and aerobic Under the conditions of, by the Fe of SI releases2+It is oxidized to Fe3+A certain amount of H can be generated2O2, active oxygen, hydroxyl radical free radical and superoxides Wait Strong oxdiatives object that can further strengthen the degradation of organic matter in MBR reactors.In addition the Fe generated3+It can be with the phosphorus generationization in water Flocculation sediment effect is learned, phosphorus is sunk in the form of ferric phosphate precipitates in the activated sludge of MBR system, is realized by regular spoil disposal Phosphorus is from the efficient removal in water.Wherein since SI specific surface areas are larger, activated sludge can adhere on SI surfaces and give birth in apparatus system Into biomembrane, removal effect and the ability of system anti impulsion load can further improve.In addition, ferro element is as in microbial body A kind of essential trace element, iron ion can become oxidized cytochrome electron acceptor, it is more inside microbes can be enhanced The activity of kind enzyme so as to enhance the activity of activated sludge, and then enhances Biochemical Treatment.In addition, bottom aerating system can incite somebody to action Muddy water mixed solution plug-flow from bottom to top, flows back into anoxic pond to supplement organic carbon needed for denitrification from top both sides in aerobic tank Source and NO3 -- N electron donors, further improve denitrification effect.Last treated water under the vacuum action of water outlet pump therefrom Between aerobic tank by hollow fiber film assembly, using the efficient crown_interception of membrane module, by sludge retention in reactor, will locate Clear water after reason is discharged from top outlet conduit.In addition, what membrane module cleaning was generated using the supersonic generator of bottom installation The high pressure backwash waterpower souring combined cleaning that ul-trasonic irradiation and bottom backwash tube generate.
The advantages of device of the invention, is：First, using Round Sump integrated oxygen-poor sponge iron-aerobic-MBR system, Reduce the construction of primary sedimentation tank and secondary settling tank, substantially reduce the floor space of device, save capital cost；Second, device It is discharged among intaking from both sides, being discharged from side water inlet from opposite side for more traditional A/O activated sludge process not only increases anti- Nitric efficiency is nitrified, and the reflux from aerobic tank to anoxic pond, section are realized using intermediate aerobic tank bottom aerating system The part energy consumption that traditional A/O activated sludge process is flowed back using reflux pump realization aerobic tank to anoxic pond is saved；Third will pass System A/O activated sludge processes are combined with MBR techniques, it is not only made to have both traditional good denitrification effect of A/O activated sludge processes, and The shortcomings that compensating for traditional A/O activated sludge processes in actual operation, for example surplus sludge volume is big, activated sludge is lost in seriously, The problems such as Mud up-floating and long startup period, easily occurs for secondary settling tank；4th, membrane module rinses the ultrasonic wave using bottom installation The high pressure backwash waterpower souring combined cleaning that the ul-trasonic irradiation and bottom backwash tube that generator generates generate, ensures Cleaning performance.
Preferably, the membrane aperture of the hollow-fibre membrane is 0.01~0.1 μm；The setting in the aperture can retain largely The macromolecule organic of the difficult for biological degradation such as antibiotic, hormone, humic acid is conducive to further improve effects of purification quality.
Preferably, the quantity of the sponge iron string bag on the aerobic tank inner wall and anoxic pond inner wall is unequal；It is lacking Oxygen pond and aerobic tank add not same amount SI respectively, not only using discharging Fe under SI anoxia conditions2+With it is aerobic under the conditions of discharge Fe3 +The lower nitrogen phosphorus strengthened in removal sanitary sewage of redox reaction effect, can also make the SI surfaces attachment that specific surface area is larger Biomembrane increases biomass effectively biological in system, also provides iron microelement for microorganism, and enhancement microbiological is lived Property, it can further improve removal effect and the ability of system anti impulsion load so that the apparatus system handles city domestic sewage Mode be to integrate microbial degradation, physical-chemical reaction, ensure that the stability and reliability of removal effect.
Backwash tube is provided with preferably, being located at below the aerobic tank below aerating system；Using the device Aerating system can be cleaned in time, ensure the good result of aerating system.
Ultrasonic transducer is provided with preferably, being located in the membrane bioreactor below backwash tube, it can High-frequency electrical energy is converted into mechanical energy；It is corresponding outside membrane bioreactor to be provided with supersonic generator, it can convert electric energy to The high-frequency ac electric signal to match with ultrasonic transducer, driving ultrasonic transducer work；Supersonic generator is placed in film Component bottom can ensure that ultrasonic film rinses uniform effect.
It is set preferably, being provided with water quality on-line checking on the outlet conduit of the hollow fiber film assembly top setting It is standby；Using the structure water quality that can monitor that treated in real time.
Preferably, being additionally provided with liquid level sensor in the membrane bioreactor, the inlet channel is equipped with Feed water flow gauge and intake pump, the liquid level sensor feed water flow gauge and intake pump are electrically connected with level sensing control system It connects, realizes to water level real-time monitoring in membrane bioreactor and control inflow.
Preferably, the total hrt 8 of apparatus of the present invention~for 24 hours, wherein anoxic pond and aerobic tank waterpower stop Time is respectively 2.0~7.0h and 5.0~20.0h, and the volumetric ratio of anoxic pond and aerobic tank is 1:1~1:5；Aerobic tank dissolved oxygen 3.0~5.0mg/L, 0.1~0.5mg/L of dissolved oxygen in anoxic tank；Sludge concentration 3000mg/L~5500mg/L.
Preferably, during operation, SI is added respectively in anoxic pond and aerobic tank, dosage is 10~35g/L, SI's Main character index：Active Fe content >=90%, 3~35mm of diameter, specific surface area >=85g/cm3, unit weight≤2.2g/cm3。
The present invention realizes the whole process of device sewage disposal, membrane module backwash etc. certainly by using PLC integrated systems Dynamicization controls, and improves operation operational efficiency, Round Sump integrated design in addition not only causes the system to city domestic sewage Processing have very strong specific aim, and easily transport and operating condition for water pollution bursting problem have well should Anxious processing effect, compared with the operation more easy to operate of other techniques and Technique Popularizing.
Description of the drawings
Fig. 1 is the system sample figure of automatic integratedization MBR method high-efficient denitrification and dephosphorization devices of the invention.
Fig. 2 is the sample interior structural map of core apparatus membrane bioreactor of the present invention.
Fig. 3 is apparatus of the present invention doughnut plate type membrane assembly structure diagram.
As shown in the figure：1. it is intake pump；2. it is gate valve；3. it is feed water flow gauge；4. it is liquid level sensor；5. it is film biology Reactor；6. it is doughnut plate type membrane assembly；7. it is aeration tube；8. it is backwash tube；9. it is backwash pump；10. it is Sludge pump；11. it is ultrasonic transducer；12. it is partition board；13. it is the sponge iron string bag (sponge iron)；14. it is pressure gauge；15. it is Monitoring water quality on line equipment；16. it is gas flowmeter；17. it is air compressor machine；18. it is level sensing control system；19. it is automatically controlled Cabinet；20. it is temperature-indicating instrument；21. it is mud valve；22. it is supersonic generator；23. it is water flow meter；24. it is water outlet pump； 25. it is water inlet pipe；26. it is water inlet；27. it is perforation water distribution uniformity pipe；28. it is sponge iron string bag hook；29. it is that aeration is dry Pipe；30. it is backwash main pipe；31. it is backwash discharge outlet；32. it is mud discharging mouth；33. it is emptying sludge pipe；34. it is aerobic tank； 35. anoxic pond；36. film wire.
Specific embodiment：
Technical scheme of the present invention is described in further detail below in conjunction with specific embodiment.
As shown in Figs. 1-3：The automatic integratedization MBR method high-efficient denitrification and dephosphorization devices of the present invention, the device include film biology Reactor 5, the membrane bioreactor 5 are divided into aerobic tank part and anoxic pond part, the aerobic tank by partition board 12 34 are located at the middle part of anoxic pond 35, and the bottom of aerobic tank and anoxic pond is interconnected；It is provided in the aerobic tank hollow Fiber film component 6, the top of hollow fiber film assembly are provided with outlet conduit 6.1；Exposure is provided with below the aerobic tank To realize the plug-flow from bottom to top of the muddy water mixed solution in aerobic tank, anoxic pond is flowed back into from top both sides for gas system；Described The left and right sides of membrane bioreactor 5 is both provided with inlet channel 25 and passes through water inlet 26 and connected with anoxic pond；Described is good The sponge iron string bag 13 is both provided on oxygen pond inner wall and anoxic pond inner wall；5 lower part of membrane bioreactor is provided with spoil disposal Pipe 33, sludge pipe are realized the connection with sludge pipe 33 by the mud discharging mouth 32 being set on 5 bottom surface of membrane bioreactor and are led to It crosses sludge pump 10 and spoil disposal power is provided.Above-mentioned aerating system is made of aeration tube 7, aeration main pipe 29 and air compressor machine 17, pneumatics Machine provides aeration power source by being aerated main pipe 29 for aeration tube 7.
Using the above structure, the specific course of work is as follows：The water inlet pipe of raw water from device body both sides enters anoxic pond, Denitrifying bacterium is using organic matter as carbon source in anoxic pond, by NO in water3 -- N is reduced into N2, the gases such as NO, and by sponge iron (SI) Fe of release2+Meeting and NO3 -Redox reaction, Fe occur for-N2+By NO3 -- N is reduced to N2Generate Fe simultaneously3+, so as to add Fast NO3 -The reduction of-N achievees the purpose that strengthen removal total nitrogen；Then the mixed liquor in anoxic pond from top to bottom gravity stream from bottom Into aerobic tank, in aerobic tank nitrifier by the ammonium oxidation in water into NO2 -- N and NO3 -- N, and under aerobic condition, The Fe discharged by SI2+It is oxidized to Fe3+A certain amount of H can be generated2O2, active oxygen, the strong oxygen such as hydroxyl radical free radical and superoxides Compound can be catalyzed the degradation of organic matter in MBR reactors.In addition the Fe generated3+Chemical flocculation precipitation can be generated with the phosphorus in water to make With phosphorus is sunk in the form of ferric phosphate precipitates in the activated sludge of MBR system, realizes phosphorus from the height in water by regular spoil disposal Effect removal.Wherein the larger SI surfaces of specific surface area can also attached biological film, can further improve removal effect and the resistance to punching of system Hit the ability of load.In addition, for ferro element as a kind of essential trace element in microbial body, it is thin that iron ion can become oxidation The electron acceptor of born of the same parents' pigment can enhance the activity of a variety of enzymes of inside microbes, so as to enhance the activity of activated sludge, Jin Erzeng Strong Biochemical Treatment.In addition, bottom aerating system can be by the plug-flow from bottom to top of muddy water mixed solution in aerobic tank, from top both sides Anoxic pond is flowed back into supplement organic carbon source needed for denitrification and NO3 -- N electron donors, further improve denitrification effect.Finally Treated water from intermediate aerobic tank by hollow fiber film assembly, using the efficient crown_interception of membrane module, by sludge retention In reactor, by treated, clear water is discharged from top outlet conduit.
The advantages of device of the invention, is：First, using Round Sump integrated oxygen-poor sponge iron-aerobic-MBR system, Reduce the construction of primary sedimentation tank and secondary settling tank, substantially reduce the floor space of device, save capital cost；Second, device It is discharged among intaking from both sides, being discharged from side water inlet from opposite side for more traditional A/O activated sludge process not only increases anti- Nitric efficiency is nitrified, and the reflux from aerobic tank to anoxic pond, section are realized using intermediate aerobic tank bottom aerating system The part energy consumption that traditional A/O activated sludge process is flowed back using reflux pump realization aerobic tank to anoxic pond is saved；Third will pass System A/O activated sludge processes are combined with MBR techniques, it is not only made to have both traditional good denitrification effect of A/O activated sludge processes, and The shortcomings that compensating for traditional A/O activated sludge processes in actual operation, for example surplus sludge volume is big, activated sludge is lost in seriously, The problems such as Mud up-floating and long startup period, easily occurs for secondary settling tank；4th, membrane module rinses the ultrasonic wave using bottom installation The high pressure backwash waterpower souring combined cleaning that the ul-trasonic irradiation and bottom backwash tube that generator generates generate, ensures Membrane module cleaning performance.
The membrane aperture of hollow-fibre membrane of the present invention is 0.01~0.1 μm；The setting in the aperture can retain a large amount of anti- The difficult for biological degradation macromolecule organics such as raw element, hormone, humic acid, are conducive to further improve effects of purification quality.
The quantity of the sponge iron string bag 13 on aerobic tank inner wall and anoxic pond inner wall of the present invention is unequal, such as attached drawing It is few in anoxic pond shown in 1, and it is more in aerobic tank；The sponge iron string bag is by being fixed in aerobic tank inner wall and anoxic pond Sponge iron net pocket hook 28, which is realized, on wall fixes；Not same amount SI is added respectively in anoxic pond and aerobic tank, is not only lacked using SI Fe is discharged under the conditions of oxygen2+With it is aerobic under the conditions of discharge Fe3+The lower nitrogen strengthened in removal sanitary sewage of redox reaction effect Phosphorus can also make the SI surfaces attached biological film that specific surface area is larger, increase biomass effectively biological in system, be also micro- life Object provides iron microelement, and enhancement microbiological activity can further improve removal effect and the ability of system anti impulsion load, So that the mode of apparatus system processing city domestic sewage is to integrate microbial degradation, physical-chemical reaction, ensure that The stability and reliability of removal effect.
As shown in attached drawing 1-2:It is located at below aerobic tank of the present invention below aerating system and is provided with backwash tube 8, backwash tube 8 is connected with backwash main pipe 30, and is passed through backwash pump 9 and provided power source；It can be timely using the device Aerating system is cleaned, ensures the good result of aerating system；The side wall of membrane bioreactor 5 is provided with instead close to top Flush discharge mouth 31, to ensure that the backwashing water of rinsing membrane module is discharged at this.
As shown in Figure 1:It is located in membrane bioreactor 5 of the present invention below backwash tube and is provided with ultrasonic wave High-frequency electrical energy can be converted to mechanical energy by energy converter 11；It is corresponding outside membrane bioreactor to be provided with supersonic generator 22, it can Convert electric energy to the high-frequency ac electric signal to match with ultrasonic transducer, driving ultrasonic transducer work；Ultrasonic wave Generator, which is placed in membrane module bottom, can ensure that ultrasonic film rinses uniform effect.
Water quality online detection instrument is provided on the outlet conduit of hollow fiber film assembly top setting of the present invention 15, while it is additionally provided with pressure gauge 14；Using the structure can monitor that treated in real time water quality and hydraulic pressure.
Be additionally provided with liquid level sensor 4 in membrane bioreactor 5 of the present invention, the inlet channel be equipped with into Water ga(u)ge 3 and intake pump 1, the liquid level sensor feed water flow gauge and intake pump are electrically connected with level sensing control system It connects, realizes to water level real-time monitoring in membrane bioreactor 5 and control inflow；It in addition can also be in membrane bioreactor 5 Set temperature analyzer 20 monitors water temperature in real time.
The above-mentioned device of the present invention, the various equipment for needing to power or parts, can unify by power control cabinet 19 come It realizes and is powered and controls.
Gate valve 2 is both provided on various pipelines of the present invention, facilitates the flowing of control medium；It is also set up on water inlet pipe Feed water flow gauge facilitates measure rate-of flow；
The present invention realizes the whole process of device sewage disposal, membrane module backwash etc. certainly by using PLC integrated systems Dynamicization controls, and improves operation operational efficiency, Round Sump integrated design in addition not only causes the system to city domestic sewage Processing have very strong specific aim, and easily transport and operating condition for water pollution bursting problem have well should Anxious processing effect, compared with the operation more easy to operate of other techniques and Technique Popularizing.
The total hrt 8 of apparatus of the present invention~for 24 hours, wherein anoxic pond and aerobic tank waterpower residence time is respectively The volumetric ratio of 2.0~7.0h and 5.0~20.0h, anoxic pond and aerobic tank is 1:1~1:5；Aerobic tank dissolved oxygen 3.0~ 5.0mg/L, 0.1~0.5mg/L of dissolved oxygen in anoxic tank；Sludge concentration 3000mg/L~5500mg/L.During operation, in anoxic Add SI in pond and aerobic tank respectively, dosage is 10~35g/L, the main character index of SI：Active Fe content >=90%, directly 3~35mm of diameter, specific surface area >=85g/cm3, unit weight≤2.2g/cm3。
Denitrogenation dephosphorizing processing is carried out using the above-mentioned device of the present invention：
Embodiment 1
The automatic integratedization MBR method high-efficient denitrification and dephosphorization devices used in the present embodiment, sewage day output are about 5.33m3, material is 316L type stainless steels, and Nets impregnated uses flat hollow pvdf membrane component, and membrane aperture is 0.01 μm, effective membrane area of crossing is 0.47m2.Effective dimensions L × B × H of reactor is 3.2m × 1.0m × 1.6m, and superelevation is 0.2m, volume 4960L, anoxic pond are 2 with aerobic tank volumetric ratio:3, wherein, anoxic pool volume be 1980L, aerobic pool volume For 2980L.Service condition is that total hrt is 14h, and wherein anoxic pond and aerobic tank waterpower residence time is respectively 5.6h and 8.4h, sludge age 60d, sludge concentration 4000mg/L, aerobic tank dissolved oxygen (DO) are 4.0mg/L, anoxic pond DO For 0.5mg/L, the anoxic pond dosage of SI is 15g/L, and aerobic tank dosage is 25g/L.
City domestic sewage water quality is shown in Table 1.
1 raw water quality (unit of table:mg/L)
Sludge biofilm and commissioning test by about 25 days or so, CODCrRemoval rate it is relatively stable, be positively retained at 85% Between~92%, it is discharged CODCrConcentration is in 35mg/L or so；The removal effect of ammonia nitrogen also preferably and removes stabilization, and removal rate can be protected It holds between 90%~97%, water outlet ammonia nitrogen concentration is in 0.5mg/L or so；Nitrogen removal rate nearly 65% is discharged about 13mg/L, and It still has a declining tendency in being run in the later stage；Total tp removal rate nearly 85% is discharged about 0.4mg/L, and in later stage operation still It has a declining tendency.
The device handles city domestic sewage, with adding isometric work in traditional A/O-MBR under identical working condition Property charcoal compares, and treated, and aqueous concentration is shown in Table 2.
Treated the effluent quality (unit of table 2:mg/L)
Treated that the every water quality index of water outlet is significantly better than that in traditional A/O-MBR adds isometric activity for the present apparatus Charcoal technique, water outlet reach《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002) level-one A standards.
Embodiment 2
The automatic integratedization MBR method high-efficient denitrification and dephosphorization devices used in the present embodiment, sewage day output are about 1.56m3, material is 316L type stainless steels, using Nets impregnated using flat hollow pvdf membrane component, fenestra Diameter is 0.05 μm, and effective membrane area of crossing is 0.36m2.Effective dimensions L × B × H of reactor is 1.5m × 0.6m × 0.8m, is surpassed A height of 0.2m, volume 720L, anoxic pond are 1 with aerobic tank volumetric ratio:2, wherein, anoxic zone volume is 240L, and aerobic zone holds Product is 480L.Service condition is that total hrt is 10h, and wherein anoxic pond and aerobic tank waterpower residence time is respectively 3.3h and 6.7h, sludge age 80d, sludge concentration 4500mg/L, aerobic tank dissolved oxygen (DO) are 4.0mg/L, anoxic pond DO For 0.3mg/L, the anoxic pond dosage of SI is 10g/L, and aerobic tank dosage is 20g/L.
City domestic sewage water quality is shown in Table 3.
3 city domestic sewage water quality (unit of table:mg/L)
City domestic sewage water quality C:N:P is less than 100:5:1, belong to low C/N ratios, low C/P compares water quality.By about 23 days Sludge biofilm and commissioning test, CODCrRemoval rate relatively stablize, be positively retained between 85%~90%, aqueous concentration exists 28mg/L or so；The removal effect of ammonia nitrogen also preferably and removes stabilization, and removal rate is maintained between 90%~95%, aqueous concentration In 0.8mg/L or so；Nitrogen removal rate nearly 62% is discharged about 14.3mg/L, and still has a declining tendency in being run in the later stage；Always Tp removal rate nearly 83% is discharged about 0.42mg/L, and still has a declining tendency in being run in the later stage.
The device handles the insufficient city domestic sewage of carbon source, is compared under identical working condition with traditional A/O-MBR, Treated, and aqueous concentration is shown in Table 4.
Treated the effluent quality (unit of table 4:mg/L)
Treated that the every water quality index of water outlet is significantly better than that biography for the insufficient city domestic sewage of carbon source for the present apparatus System A/O-MBR techniques, water outlet reach《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002) level-one A is marked It is accurate.
According to the automatic integratedization MBR method high-efficient denitrification and dephosphorization devices of different disposal amount in Examples 1 and 2 to urban life Nitrogen phosphorus and organic pollutant treatment effect are superior to traditional handicraft in sewage, and water outlet reaches《Urban wastewater treatment firm Pollutant emission standard》(GB18918-2002) level-one A standards, it is seen that this automatic integratedization MBR methods high-efficient denitrification and dephosphorization dress Put has good removal effect to nitrogen phosphorus in city domestic sewage and organic pollutant.

Claims (10)

1. a kind of automatic integratedization MBR method high-efficient denitrification and dephosphorization devices, it is characterised in that：The device includes membrane bioreactor, The membrane bioreactor is divided into aerobic tank part and anoxic pond part by partition board, and the aerobic tank is located at anoxic pond Middle part, and the bottom of aerobic tank and anoxic pond is interconnected；Hollow fiber film assembly, hollow fibre are provided in the aerobic tank The top of dimension membrane module is provided with outlet conduit；Gas explosion system is provided with below the aerobic tank, to realize in aerobic tank Muddy water mixed solution from bottom to top plug-flow, from top both sides flow back into anoxic pond；The left and right two of the membrane bioreactor Side is both provided with inlet channel and passes through water inlet and connected with anoxic pond；On the aerobic tank inner wall and anoxic pond inner wall It is provided with the sponge iron string bag；The membrane bioreactor lower part is provided with sludge pipe.
2. automatic integratedization MBR methods high-efficient denitrification and dephosphorization device according to claim 1, it is characterised in that：In described The membrane aperture of empty fiber membrane is 0.01~0.1 μm.
3. automatic integratedization MBR methods high-efficient denitrification and dephosphorization device according to claim 1, it is characterised in that：Described is good The quantity of the sponge iron string bag on oxygen pond inner wall and anoxic pond inner wall is unequal.
4. automatic integratedization MBR methods high-efficient denitrification and dephosphorization device according to claim 1, it is characterised in that：Described is good It is located at below oxygen pond below gas explosion system and is provided with backwash tube.
5. automatic integratedization MBR methods high-efficient denitrification and dephosphorization device according to claim 1, it is characterised in that：The film Be located at below backwash tube in bioreactor and be provided with ultrasonic transducer, outside membrane bioreactor it is corresponding be provided with it is super Sonic generator.
6. automatic integratedization MBR methods high-efficient denitrification and dephosphorization device according to claim 1, it is characterised in that：In described Water quality online detection instrument is provided on the outlet conduit of empty fiber membrane component top setting.
7. automatic integratedization MBR methods high-efficient denitrification and dephosphorization device according to claim 1, it is characterised in that：The film Liquid level sensor is additionally provided in bioreactor, the inlet channel is equipped with feed water flow gauge and intake pump, described Liquid level sensor feed water flow gauge and intake pump are electrically connected with level sensing control system, are realized to water in membrane bioreactor Inflow is monitored and controlled in position in real time.
8. automatic integratedization MBR methods high-efficient denitrification and dephosphorization device according to claim 1, it is characterised in that：The device Total hrt 8~for 24 hours, wherein anoxic pond and aerobic tank waterpower residence time be respectively 2.0~7.0h and 5.0~ The volumetric ratio of 20.0h, anoxic pond and aerobic tank is 1:1~1:5；Aerobic tank 3.0~5.0mg/L of dissolved oxygen, dissolved oxygen in anoxic tank 0.1~0.5mg/L；Sludge concentration 3000mg/L~6500mg/L.
9. automatic integratedization MBR methods high-efficient denitrification and dephosphorization device according to claim 1, it is characterised in that：In the runtime Between, SI is added respectively in anoxic pond and aerobic tank, and dosage is 10~35g/L.
10. automatic integratedization MBR methods high-efficient denitrification and dephosphorization device according to claim 9, it is characterised in that：The SI Property index：Active Fe content >=90%, 3~35mm of diameter, specific surface area >=85g/cm3, unit weight≤2.2g/cm3。
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