CN101913734B - A/A-MBR intensified combined device for denitriding and dephosphorizing and process thereof - Google Patents
A/A-MBR intensified combined device for denitriding and dephosphorizing and process thereof Download PDFInfo
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- CN101913734B CN101913734B CN2010102528358A CN201010252835A CN101913734B CN 101913734 B CN101913734 B CN 101913734B CN 2010102528358 A CN2010102528358 A CN 2010102528358A CN 201010252835 A CN201010252835 A CN 201010252835A CN 101913734 B CN101913734 B CN 101913734B
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Abstract
The invention provides an intensified device for denitriding and dephosphorizing, which aims at tower sewage characteristics and can realize the target of standardization and reconstruction. The A/A-MBR intensified combined device for denitriding and dephosphorizing comprises a water inlet pump, a grille, a regulating pond, an anoxia pond, an anaerobic pond, an MBR pond, a film assembly, a water outlet pump, a back wash pump, a back wash water tank and a blower. By utilizing the process of treating the town sewage by the A/A-MBR intensified combined device for denitriding and dephosphorizing, the sewage is hoisted by the water inlet pump and filtered by the grille to enter the regulating pond, then enter the anoxia pond and anaerobic pond, and finally enter the MBR pond, and flow out after being subjected to the membrane separation.
Description
One, technical field
The present invention relates to sewage treatment area, relate in particular to denitrogenation dephosphorizing intensifying device and technology thereof in a kind of WWT.
Two, background technology
For realizing each basin water environment sustainable development; Emphasis regulation body eutrophication; Governments at all levels have all strengthened the quality of water environment management intensity of each department; For example Jiangsu Province has issued " the main water pollutant emission limit set of TAI HU AREA urban wastewater treatment firm and priority industry industry " (DB32 1072-2007), require that sewage work must satisfy in the basin " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard.It is urgent that the major river valley urban wastewater treatment firm is carried the mark transformation task.Process form to sewage denitrification and dephosphorization is a lot of both at home and abroad, mainly contains Bardenpho, A/A/O, UCT, VIP, oxidation ditch and SBR etc., and these technologies have its characteristics and applicable elements separately.But the town sewage water quality and quantity changes greatly, and C/N ratio is generally on the low side, the suspended solid inorganic component proportion is higher, and organic carbon source is not enough, cause system's denitrification and inhale phosphorus competition carbon source, and denitrification and dephosphorization inefficiency, total nitrogen is lower with total tp removal rate.In order to reach the emission standard of one-level A, the specific aim measure mainly is: 1) on existing technology, improve denitrification usefulness through adding additional carbon, this makes cost of sewage disposal increase and the operation complicacy.2) use for reference feedwater treatment method, after two stage biological is handled, set up coagulation, deposition and filtration process, promptly be equivalent to sewage work stack waterworks, economic target is high undoubtedly.3) existing technology is improved and strengthen; Strengthen dephosphorization and denitrification effect; As improve A/A/O, improvement oxidation ditch, Multistage U NTANK, improvement aeration mode and dissolved oxygen distribution or the like, and it is up to standard that the improved technology of having used still has indivedual indexs to be difficult to, and great majority are also in the test exploratory stage.Therefore, further research and develop new technology and novel process, improve treatment system denitrogenation dephosphorizing efficient, will play a significant role for promoting the urban wastewater treatment firm upgrading.
Membrane bioreactor (MBR, Membrane bio-reactor) is a kind of novel, the sewage disposal technology efficiently that is combined by membrane separation technique and biologic treating technique.With MBR technology and A/A/O technology organic combination; Form Anoxic/Anaerobic-Membrane bio-reactor (being A/A-MBR) combination process; Not only can utilize its efficient removal function to suspended substance; Can be the sludge concentration and the living weight that provide higher in the reactor drum simultaneously, can realize the effect of intensified denitrification and dephosphorization through the reasonable cooperation of each item technical measures.
Three, summary of the invention
Goal of the invention: the object of the present invention is to provide a kind of intensified denitrification and dephosphorization device and technology thereof that also can realize putting forward mark transformation target to the town sewage characteristic.To the town sewage characteristic; Preferred homemade ultra-filtration membrane of high quality and at a reasonable price; In conjunction with existing process modification, not setting up under the structures condition and the MBR coupling, promptly in existing A/A/O process system; Transform aerobic zone as MBR; And improve the main process flow process that forms Anoxic/Anaerobic-Membrane bio-reactor (being A/A-MBR) strengthening biological carbon and phosphorous removal, and realize that the urban wastewater treatment firm water outlet reaches one-level A standard, carry mark transformation for urban wastewater treatment firm and provide fundamental basis and technical support.
Technical scheme: A/A-MBR intensified denitrification and dephosphorization associated plant, this device comprise intake pump, grid, equalizing tank, anoxic pond, anaerobic pond, MBR pond, membrane module, go out water pump, backwashing pump, back flushing water tank and gas blower, intake pump, grid, equalizing tank, anoxic pond, anaerobic pond, MBR pond and go out water pump successively the order pipe connection; The pipeline that equalizing tank is connected with anoxic pond is provided with the pipeline that is connected with anaerobic pond, and membrane module is located in the MBR pond, and gas blower links to each other with the MBR pond; The MBR pond is provided with a reflux line and links to each other with anoxic pond; The back flushing water tank is connected in parallel on the MBR pond and goes out on the connecting tube of water pump through backwashing pump, and said membrane module is the immerseable curtain type membrane, molecular weight cut-off 150,000 dalton; The filter membrane material is PVDF; Film silk inside/outside diameter 1.20/1.80mm, 2200 of number of capillaries, film mean pore size 0.02 μ m; Diameter 30mm after the colligation of single bundle film, membrane module aeration tube aperture 3mm.The useful volume of said anoxic pond is: 4.0～8.4m
3The useful volume of said anaerobic pond is: 3.2m
3The useful volume in said MBR pond is: 12m
3
Utilize A/A-MBR intensified denitrification and dephosphorization associated plant to handle the technology of town sewage, sewage gets into equalizing tank after being promoted by intake pump behind grid filtration; Get into anoxic pond and anaerobic pond again; Get into the MBR pond at last, water outlet behind membrane sepn, wherein the flooding velocity of anoxic pond and anaerobic pond designs the proportional distribution according to 1: 1; Mixed solution is back to anoxic pond according to reflux ratio 200% in the MBR pond simultaneously, and sludge age is not less than 15d; The hydraulic detention time of this combination process (h): anoxic pond 2.0～4.2, anaerobic pond 1.6, MBR pond 6.0; Mixed liquor suspended solid, MLSS concentration (mg/L): anoxic pond 3000～4000, anaerobic pond 3000～4000, MBR pond 7000～8000; Dissolved oxygen (mg/L): anoxic pond 0.5, anaerobic pond＜0.2, MBR pond 2.0; PH value: anoxic pond 7.5～8.0, anaerobic pond 7.2～7.5, MBR pond 7.2～7.5.
Beneficial effect: it is unstable that this technology has solved common process denitrogenation dephosphorizing efficient, can't satisfy the problem of one-level A emission standard, researched and developed technology and device to the town sewage characteristic.This method and apparatus organically combines MBR technology and traditional denitrification dephosphorization technique; Do not setting up under the structures condition original denitrification dephosphorization technique and MBR coupling; Promptly in existing A/A/O process system apparatus; Aerobic zone is set up ultra-filtration membrane form the MBR reaction zone, and oxygen-starved area (Anoxic) is arranged at anaerobic zone (Anaerobic) afterwards, form the A/A-MBR combination process.In the MBR pond, not only can realize the degraded BOD of traditional A/A/O technology, nitrated function; Can also utilize ultra-filtration membrane wherein that suspended substance is had good crown_interception; Realize the mud-water separation function simultaneously; Also can be provided with in addition and improve system sludge concentration, strengthen the whole denitrogenation dephosphorizing effect of combination process through rational backflow.The experiment proof adopts the A/A-MBR combination process to guarantee that stable water outlet is up to standard, is a kind of technology that application prospect is arranged.The flooding velocity design of combination process oxygen-starved area and anaerobic zone should be according to 1: 1 proportional distribution; Simultaneously mixed solution is back to the oxygen-starved area according to reflux ratio 200% and is advisable in the MBR district; Sludge age should be greater than 15d; The dissolved oxygen in MBR district is controlled at about 2mg/L is advisable, and to reduce in the nitrated phegma high-solubility oxygen denitrifying restraining effect is stablized the denitrogenation effect of combination process.Combination process is stable, and " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) requirement of one-level A standard is satisfied in water outlet.
In the technology; Nitrated mixed-liquor return in 50% water inlet and the MBR pond is gone into anoxic pond and can be helped denitrifying bacteria in the anoxic pond and make full use of water-inlet carbon source and carry out denitrification denitrogenation; Simultaneously the mixed solution after nitrated gets into anaerobic pond; Helping polyP bacteria and make full use of the organic carbon source that distributes in 50% water inlet and realize fully releasing phosphorus, is that polyP bacteria gets into the excessive favourable condition that phosphorus is created, the dephosphorization effect of reinforcing process simultaneously released in MBR pond (aerobic zone); The terminal MBR pond of technology not only has conventional aerobic zone and further removes BOD, nitrated function; Also bear in the traditional technology second pond and held back the function that SS, mud-water separation and mud reflux; Can further be to realize the removal of technology to non-dissolved phosphorus and other pollutents; Strengthen the bulk treatment effect of technology, and simplified technical process
Four, description of drawings
Fig. 1 is apparatus of the present invention synoptic diagram, intake pump 1, grid 2, equalizing tank 3, anoxic pond 4, anaerobic pond 5, MBR pond 6, membrane module 7 among the figure, goes out water pump 8, backwashing pump 9, back flushing water tank 10 and gas blower 11; A water inlet, B water outlet, C back flushing, D mud reflux; Q
1: be dispensed into the flooding velocity of anoxic pond, Q
2: the flooding velocity that is dispensed into anaerobic pond.
Fig. 2 is the pollutant removal effect of A/A-MBR process stabilizing run duration.A/A-MBR technology has been kept the contaminant removal capacity of efficient stable under the bigger situation of reality water inlet fluctuation.As water inlet COD, NH
4 +184.05～650.00,12.11～31.00,21.06～44.93 with during 1.73～6.42mg/L, each principal pollutant average removal rate is respectively COD 89.50% (Fig. 2 A), NH respectively for-N, TN and TP
4 +-N 98.29% (Fig. 2 B), TN 62.38% (Fig. 2 C), TP 95.00% (Fig. 2 D), water outlet MV is respectively COD 35.36mg/L, NH
4 +-N 0.41mg/L, TN 10.91mg/L, TP 0.21mg/L satisfies " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A requirement, realizes the stably reaching standard discharging.
Five, embodiment
Below in conjunction with specific examples, further set forth the present invention.Should be understood that these embodiment only are used for that the present invention will be described, do not constitute the restriction to the claim scope, other alternative means that it may occur to persons skilled in the art that are all in claim scope of the present invention.
Embodiment 1:
A/A-MBR intensified denitrification and dephosphorization associated plant, this device comprise intake pump 1, grid 2, equalizing tank 3, anoxic pond 4, anaerobic pond 5, MBR pond 6, membrane module 7, go out water pump 8, backwashing pump 9, back flushing water tank 10 and gas blower 11, intake pump, grid, equalizing tank, anoxic pond, anaerobic pond, MBR pond and go out water pump successively the order pipe connection; The pipeline that equalizing tank is connected with anoxic pond is provided with the pipeline that is connected with anaerobic pond, and membrane module 7 is located in the MBR pond 6, and gas blower links to each other with the MBR pond; The MBR pond is provided with a reflux line and links to each other with anoxic pond; The back flushing water tank is connected in parallel on the MBR pond and goes out on the connecting tube of water pump through backwashing pump, and said membrane module is the immerseable curtain type membrane, molecular weight cut-off 150,000 dalton; The filter membrane material is PVDF; Film silk inside/outside diameter 1.20/1.80mm, 2200 of number of capillaries, film mean pore size 0.02 μ m; Diameter 30mm after the colligation of single bundle film, membrane module aeration tube aperture 3mm.The useful volume of said anoxic pond is: 4.0～8.4m
3The useful volume of said anaerobic pond is: 3.2m
3The useful volume in said MBR pond is: 12m
3
Embodiment 2:
After sewage is promoted by intake pump; Behind grid filtration, get into equalizing tank, get into anoxic pond and anaerobic pond again, get into the MBR pond at last; Water outlet behind membrane sepn; Wherein the flooding velocity of anoxic pond and anaerobic pond designs the proportional distribution according to 1: 1, and mixed solution is back to anoxic pond according to reflux ratio 200% in the MBR pond simultaneously, and sludge age is not less than 15d; The hydraulic detention time of this combination process (h): anoxic pond 2.0～4.2, anaerobic pond 1.6, MBR pond 6.0; Mixed liquor suspended solid, MLSS concentration (mg/L): anoxic pond 3000～4000, anaerobic pond 3000～4000, MBR pond 7000～8000; Dissolved oxygen (mg/L): anoxic pond 0.5, anaerobic pond＜0.2, MBR pond 2.0; PH value: anoxic pond 7.5～8.0, anaerobic pond 7.2～7.5, MBR pond 7.2～7.5.
Embodiment 3:
Research trial is the water inlet condition with certain urban wastewater treatment firm settling pit water outlet, is research object with the A/A-MBR Technology, through control different tests condition, finally finds rational and effective intensified denitrification and dephosphorization technology.
(1) experiment is carried out at certain urban wastewater treatment firm, and this experimental design is also installed pilot scale device (2m
3/ h is like Fig. 1).The device water inlet is the water outlet of urban wastewater treatment firm rotational flow grit chamber, and concrete water-quality guideline is seen table 1.Experimental technique flow process such as Fig. 1; Operating to of A/A-MBR combination process: former water gets into equalizing tank after being promoted by submersible sewage pump behind fine fack and video disc strainer, get into oxygen-starved area, anaerobic zone more successively; Get into the MBR pond at last; Water outlet behind membrane sepn, and can distribute the entering anoxic pond according to technology operation adjustment water inlet, the mixing in the MBR pond is back to anoxic pond.In the MBR pond, be provided with polysulfone hollow fiber ultrafiltration membrane system, its parameter is seen table 2, and the main operating parameter of combination process is seen table 3.Experimental installation is equipped with a cover PLC automation control system and an on-line monitoring parameter acquisition system.
Table 1 pilot experiment device water-in and water-out water quality
* water outlet is " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard.
Table 2 membrane module and parameter
Table 3A/A-MBR combination process operating parameter
(2) the steady running situation of combination process
A/A-MBR process stabilizing run duration is to the removal efficient stable (see figure 2) of pollutent, and each principal pollutant average removal rate is respectively TP 95.00%, and TN 62.38%, NH
4 +-N 98.29%, and COD 89.50%, and water outlet MV is respectively TP0.21mg/L, TN 10.91mg/L, NH
4 +-N 0.41mg/L, COD 35.36mg/L satisfies " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A requirement.
Claims (1)
1. utilize A/A-MBR intensified denitrification and dephosphorization associated plant to handle the technology of town sewage; It is characterized in that said this device comprises intake pump (1), grid (2), equalizing tank (3), anoxic pond (4), anaerobic pond (5), MBR pond (6), membrane module (7), goes out water pump (8), backwashing pump (9), back flushing water tank (10) and gas blower (11), intake pump, grid, equalizing tank, anoxic pond, anaerobic pond, MBR pond and go out water pump successively the order pipe connection, the pipeline that equalizing tank is connected with anoxic pond is provided with the pipeline that is connected with anaerobic pond; Membrane module (7) is located in the MBR pond (6); Gas blower links to each other with the MBR pond, and the MBR pond is provided with a reflux line and links to each other with anoxic pond, and the back flushing water tank is connected in parallel on the MBR pond and goes out on the connecting tube of water pump through backwashing pump; Said membrane module is the immerseable curtain type membrane; Molecular weight cut-off 150,000 dalton, the filter membrane material is PVDF, film silk inside/outside diameter 1.20/1.80mm; 2200 of number of capillaries; Film mean pore size 0.02 μ m, diameter 30mm after the colligation of single bundle film, membrane module aeration tube aperture 3mm; After sewage is promoted by intake pump; Behind grid filtration, get into equalizing tank, get into anoxic pond and anaerobic pond again, get into the MBR pond at last; Water outlet behind membrane sepn; Wherein the flooding velocity of anoxic pond and anaerobic pond designs the proportional distribution according to 1: 1, and mixed solution is back to anoxic pond according to reflux ratio 200% in the MBR pond simultaneously, and sludge age is not less than 15d; The hydraulic detention time of this combination process (h): anoxic pond 2.0～4.2, anaerobic pond 1.6, MBR pond 6.0; Mixed liquor suspended solid, MLSS concentration (mg/L): anoxic pond 3000～4000, anaerobic pond 3000～4000, MBR pond 7000～8000; Dissolved oxygen (mg/L): anoxic pond 0.5, anaerobic pond＜0.2, MBR pond 2.0; PH value: anoxic pond 7.5～8.0, anaerobic pond 7.2～7.5, MBR pond 7.2～7.5.
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| CN103936231B (en) * | 2014-04-29 | 2016-03-30 | 广州市市政工程设计研究总院 | A kind of energy-saving inversion A AO-MBR sewage water treatment method |
| CN106423042B (en) * | 2016-09-26 | 2020-04-24 | 格丰环保科技有限公司 | Precision phosphorus removal nano material, preparation method thereof and conventional power integrated sewage treatment equipment |
| CN106630498B (en) * | 2017-02-21 | 2023-07-25 | 云南水务投资股份有限公司 | Integrated village and town sewage treatment equipment |
| CN107285559A (en) * | 2017-07-06 | 2017-10-24 | 济南大学 | A kind of integrated ozone coupling ceramic membrane membrane bioreactor and handling process |
| CN110204150A (en) * | 2019-07-04 | 2019-09-06 | 安吉起航环境工程有限公司 | Municipal sewage mentions mark reforming technology |
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| CN1693241A (en) * | 2005-04-28 | 2005-11-09 | 蒋遂安 | Process for treating organic sewage by three section method and its apparatus |
| CN101139154A (en) * | 2007-08-17 | 2008-03-12 | 北京碧水源科技股份有限公司 | Organic waste water processing method |
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| CN1693241A (en) * | 2005-04-28 | 2005-11-09 | 蒋遂安 | Process for treating organic sewage by three section method and its apparatus |
| CN101139154A (en) * | 2007-08-17 | 2008-03-12 | 北京碧水源科技股份有限公司 | Organic waste water processing method |
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