CN103112950A - Dynamic-membrane anaerobic-aerobic integrated online backwash treatment method for printing and dyeing wastewater - Google Patents
Dynamic-membrane anaerobic-aerobic integrated online backwash treatment method for printing and dyeing wastewater Download PDFInfo
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Abstract
The invention discloses a dynamic-membrane anaerobic-aerobic integrated online backwash treatment method for printing and dyeing wastewater, relating to printing and dyeing wastewater treatment methods. The method comprises the following steps: the wastewater enters an anaerobic pool; two groups of anaerobic dynamic membranes are placed in the anaerobic pool, a stirrer is arranged at the bottom of the anaerobic pool, the anaerobic pool passes through a heater, and sludge is discharged from the bottom of the anaerobic pool; the wastewater passes through one group of anaerobic dynamic membranes from inside to outside and the other group of anaerobic dynamic membranes so as to be filtrated and then enters an aerobic pool; two groups of aerobic dynamic membranes are placed in the aerobic pool, during the operation of the aerobic pool, a perforated aeration tube is mounted inside the aerobic pool, the aeration is carried out by an aerator, and sludge is discharged from the bottom of the aerobic pool; and water subjected to aerobic treatment passes through one group of aerobic dynamic membranes from inside to outside and the other group of aerobic dynamic membranes from outside to inside so as to be filtrated, then, the treatment on the water is completed, the water is discharged out of a system, the switchover of the two groups of aerobic dynamic membranes is realized through switching inlet/outlet valves of the aerobic dynamic membranes, and thus, the aim of online backwash is reached. The method has the advantages of small floor area, wide application range, low cost, simple equipment, easiness in operation, difficulty in membrane pollution, and better treatment effect.
Description
Technical field
The present invention relates to a kind for the treatment of process of dyeing waste water, especially relate to a kind of dyeing waste water Dynamic Membrane anaerobic-aerobic integrated online backwashing treatment process.
Background technology
Along with the fast development of industrial technology, synthetic dyestuff are widely used for dyeing, and oneself surpasses kind more than 10000 kind of dyes.At present, world's annual production of dyestuff is about 800～900 * 10
3T, China's dyestuff annual production has reached 150 * 10
3T occupies prostatitis, the world.Along with the fast development of dyestuffs industries, its factory effluent has become one of current topmost pollution source of water body.Synthetic dyestuff have multiple sorting technique: be divided into according to chromophoric group: anthraquinone dyes, azo dyes, indigoid dyestuff etc.; Be divided into according to application performance: matching stain, dispersed dye, reactive dyestuffs, vat dyes etc.; Wherein, anthraquinone dyes can be divided into again three kinds of fragrant aminoanthraquinone, aminoanthraquinone and heterocycle anthraquinones by structure.Anthraquinone dyes is a class important in the synthetic dyestuff, all contain one or more carbonyls (C=O) conjugated system in the molecular structure, and has stable condensed ring aromatic hydrocarbon structure, have waterproof, anti-illumination, the characteristic such as anti-oxidant, can be under water surrounding, illumination, oxygenant existence condition stable existence.Because various, the production technique of dye species, dyeing are different, the wastewater flow rate that produces and component are also different, when even remaining dye component concentration is very low, also can cause the water body transmittance to reduce, colourity increases, the destruction that causes ecotope, so the decolouring of dyeing waste water and improvement technology have become difficult point and the emphasis of Industrial Wastewater Treatment.
In recent years, the Dyeing and Printing Wastewater Biological Treatment technology turns to the anaerobic-aerobic combination treatment method by the single anaerobic process of tradition, aerobic method, but has the problems such as surplus sludge volume is large, energy consumption is high, floor space is large.Film-bioreactor technology (MBR) is the new system that membrane separation technique and biological wastewater treatment technology are combined, this system substitutes second pond in the two stage biological treatment process with membrane separation technique, but have technical process simple, take up an area less, the characteristics such as convenient management, processing efficiency height, water outlet direct reuse.Yet it is the Main Bottleneck of restriction film-bioreactor widespread use in sewage disposal that film pollutes, and studies show that, having the adhering to of microorganism such as active sludge in traditional film-bioreactor is to cause film to pollute, affect one of important factor of membrane flux.Simultaneously, have in the handled dyeing waste water of the present invention that a large amount of viscosity are large, the pollutent of strong adhesion, increased the weight of the degree that film pollutes.Therefore, improving the operation scheme of membrane module in the film-bioreactor, prolong the duration of service of film, do not affect treatment effect simultaneously, is the development trend of present film-bioreactor.Publication number is that the Chinese invention patent application of CN01016185A, CN1974439A, CN01100333A adopts respectively and takes filler to show to adhere to engineering bacteria or enzyme form, or adopt granule sludge form so that the microorganism in the film-bioreactor no longer exist with suspended state, thereby alleviate impact on membrane flux.Yet, utilize the mode of filling surface attached microbial to improve to exist and be unfavorable for the shortcomings such as extraordinary microbial growth, microorganism concn is low, soil removability is poor; Utilize granule sludge to improve and exist the easy structure of community broken, that cause stopping up fenestra, granule sludge self formation of granule sludge to be difficult to the shortcomings such as Artificial Control microflora stablizes.
Although above-mentioned patent has been carried out improvement and bring new ideas to biological treatment, the example that MBR technique is used in large-scale sewage disposal is few.Reason mainly is: the cost of membrane module and operational process power consumption are too high, cause working cost very high; Suspended contaminant is trapped or is adsorbed on the film surface under the effect of pressure in the operational process of film, causes the pollution of film, makes effluent flux sharp-decay etc.Therefore, need to research and develop out novel membrane bioreactor for these shortcomings, so that it addresses the above problem as far as possible on the former advantageous basis of reservation.In the common membrane filtration processes, the colloid in the solution and suspended particle are trapped or are adsorbed on the film surface under the effect of filter pressure, caused the decline of membrane flux, and this phenomenon is called film and pollutes.But from the another one angle, the pollution layer on film surface has strengthened the interception capacity of film, makes microfiltration membrane can hold back virus even small organic molecule, just looks like to have increased again a skim on original film.Because this tunic forms in filtration procedure, its composition and thickness all may reach in time the variation of the condition such as bio-reactor operation and change, so some investigators are referred to as Dynamic Membrane or secondary film.Correspondingly, this reactor is called bioreactor of dynamic membrane.The appearance of Dynamic Membrane has solved two hang-ups of above-mentioned MBR well, because because the selection of porous counterdie and precoating paint is extensive and cheap and easy to get, descends so that the cost of Dynamic Membrane has very significantly than traditional MBR.In addition, because that the porous counterdie is the flux of membrane matrix itself is just very large, treat that it is spontaneous, therefore effectively controlling diaphragm pollution after in the with serious pollution situation of film, can also the Dynamic Membrane on membrane matrix surface being removed by the online backwashing technology.And other advantages such as Dynamic Membrane also has that equipment is simple, processing ease, treatment effect are better, therefore, Dynamic membrane has caused people's research and concern widely.
Summary of the invention
The objective of the invention is for problems such as existing processing efficiency are low in the existing treatment of dyeing wastewater, occupation area of equipment is large, cost of investment is high, a kind of efficient economy is provided, can effectively reduce the film pollution level, guarantee the dyeing waste water Dynamic Membrane anaerobic-aerobic integrated online backwashing treatment process for the treatment of effect.
The present invention includes following steps:
1) raw wastewater at first enters the anaerobic pond of the on-line Full back-purge system of Dynamic Membrane anaerobic-aerobic integratedization through equalizing tank;
2) place two groups of anaerobic dynamic films in anaerobic pond, agitator is established in the bottom, and anaerobic pond is by well heater and stir anaerobic pond bottom spoil disposal;
3) raw wastewater is from inside to outside through after being located at a group in two groups of anaerobic dynamic films in the anaerobic pond, after ecto-entad filters through another group again, enter Aerobic Pond, by switching the anaerobic dynamic film terminal valve, realize the exchange of two groups of anaerobic dynamic films, reach the purpose of online backwashing;
4) place two groups of aerobic Dynamic Membrane in Aerobic Pond, Aerobic Pond is when operation, and boring aeration pipe is equipped with in Aerobic Pond inside, by the aerator aeration, and Aerobic Pond bottom spoil disposal;
5) water after the aerobic treatment after ecto-entad filters through another group again, is finished processing from inside to outside through after in two groups of aerobic Dynamic Membrane one group, the discharge system, by switching the terminal valve of aerobic Dynamic Membrane, realize the exchange of two groups of aerobic Dynamic Membrane, reach the purpose of online backwashing.
In step 2) in, described anaerobic dynamic film can adopt the anaerobic dynamic film of being made by industrial filter cloth, and the aperture of described industrial filter cloth can be 10～300 μ m, and industrial filter cloth can be selected from least a in the long fibre of terylene short fiber, terylene, polyvinyl, the polypropylene fibre etc.; The temperature of described well heater can be 15～35 ℃; The speed of described stirring can be 60～200r/min.
In step 4), described aerobic Dynamic Membrane can adopt the anaerobic dynamic film of being made by industrial filter cloth, and the aperture of described industrial filter cloth can be 10～300 μ m, and industrial filter cloth can be selected from least a in the long fibre of terylene short fiber, terylene, polyvinyl, the polypropylene fibre etc.; The temperature of described Aerobic Pond when operation can be 10～35 ℃; The aeration rate of described aeration can be 0.5～5L/min, and the dissolved oxygen in the Aerobic Pond can be DO 〉=2.0mg/L.
In step 5), the part of contaminated water in the described Aerobic Pond of finishing after the processing can be drawn back to anaerobic pond by back water pump, to form the Aerobic Pond sewage backflow, finishes the treating processes to sewage; Control backflow flow velocity is 5～500mL/min; According to waste water quality type, the processing water yield and organic loading, by control water inlet flow velocity and backflow flow velocity, waste water is processed continuously, water outlet rear discharging up to standard in anaerobic pond and Aerobic Pond.
Effect and the function of the on-line Full back flushing system of Dynamic Membrane anaerobic-aerobic integratedization of the present invention are as follows:
1) Dynamic Membrane has solved the expensive and film pollution difficult problem of MBR film: traditional membrane module cost is high, and the operational process power consumption is large, causes working cost high.Suspended contaminant is trapped or is adsorbed on the film surface under the effect of pressure in the operational process of film, causes the pollution of film.And Dynamic Membrane is extensive and cheap and easy to get by the selection of porous counterdie and precoating paint, so that having significantly than traditional MBR, its cost and cost descend, the porous counterdie is that the flux of membrane matrix itself is larger, treat that again it is spontaneous after also can the Dynamic Membrane on membrane matrix surface being removed by the online backwashing technology in the with serious pollution situation of film, controlling diaphragm pollutes effectively.
2) replace traditional membrane module with Dynamic Membrane, it organically combines membrane separation technique and bioprocesses, with the second pond in the high efficiency separation effect replacement traditional activated sludge process of membrane technique, realize incomparable mud-water separation and the mud concentrated effect of traditional technology, eliminated the impact of sludge bulking.It has also increased substantially the concentration of active sludge in the aeration tank, save the sludge reflux system, greatly prolonged mud age, reduced surplus sludge volume, and by the efficient crown_interception of film to SS, organism, pathogenic bacteria and virus in the waste water, greatly improved the processing effluent quality.
3) by the backflow of Aerobic Pond liquid in the Dynamic Membrane macromolecule contaminant that in time will not be hydrolyzed acidifying can degraded further through in time returning anaerobic pond behind the Aerobic Pond again.Performance anaerobic and aerobic microbe is advantage separately.
The present invention is based on membrane separation technique and biologic treating technique combines, make Dynamic Membrane by porous counterdie and precoated layer, descend so that the cost of Dynamic Membrane has very significantly than traditional MBR; Because the flux of porous counterdie is larger, adopts the online backwashing technology in addition, controlling diaphragm pollutes effectively.Compare with the multistage multistage dirty water living creature processing technique of traditional dyeing waste water, it is little that the present invention has floor space, the advantage such as applied widely, that cost of investment is low, equipment is simple, processing ease, film are difficult for polluting, treatment effect is better is applicable to the biological treatment of multiple sewage.
Description of drawings
Fig. 1 is that the embodiment of the invention adopts the on-line Full back flushing treatment unit of Dynamic Membrane anaerobic-aerobic integratedization and schema.
Embodiment
Referring to Fig. 1, below provide concrete steps:
1) raw wastewater A is at first entered the anaerobic pond 2 of the on-line Full back-purge system of Dynamic Membrane anaerobic-aerobic integratedization through intake pump 1 by equalizing tank.
2) at two groups of anaerobic dynamic films 61 of anaerobic pond 2 interior placements, agitator 8 is established in the bottom, and anaerobic pond is by well heater 7 and stir anaerobic pond bottom spoil disposal; Described anaerobic dynamic film 61 can adopt the anaerobic dynamic film of being made by industrial filter cloth, and the aperture of described industrial filter cloth can be 10～300 μ m, and industrial filter cloth can be selected from least a in the long fibre of terylene short fiber, terylene, polyvinyl, the polypropylene fibre etc.; The temperature of described well heater can be 15～35 ℃; The speed of described stirring can be 60～200r/min.
3) raw wastewater is from inside to outside through after being located at a group in two groups of anaerobic dynamic films 61 in the anaerobic pond 2, after ecto-entad filters through another group again, enter Aerobic Pond 5, by switching anaerobic dynamic film 61 terminal valves, realize the exchange of two groups of anaerobic dynamic films, reach the purpose of online backwashing.
4) in two groups of aerobic Dynamic Membrane 62 of Aerobic Pond 5 interior placements, Aerobic Pond 5 is when operation, and boring aeration pipe is equipped with in Aerobic Pond 5 inside, by aerator 3 aerations, and Aerobic Pond 5 bottom spoil disposals; Described aerobic Dynamic Membrane 62 can adopt the anaerobic dynamic film of being made by industrial filter cloth, and the aperture of described industrial filter cloth can be 10～300 μ m, and industrial filter cloth can be selected from least a in the long fibre of terylene short fiber, terylene, polyvinyl, the polypropylene fibre etc.; The temperature of described Aerobic Pond 5 when operation can be 10～35 ℃; The aeration rate of described aeration can be 0.5～5L/min, and the dissolved oxygen in the Aerobic Pond 5 can be DO 〉=2.0mg/L.
5) water after the aerobic treatment is from inside to outside through after in two groups of aerobic Dynamic Membrane 62 one group, after ecto-entad filters through another group again, finish processing, the discharge system, by switching the terminal valve of aerobic Dynamic Membrane 62, realize the exchange of two groups of aerobic Dynamic Membrane 62, reach the purpose of online backwashing.Part of contaminated water in the described Aerobic Pond 5 of finishing after the processing can be drawn back to anaerobic pond 2 by back water pump 4, to form the Aerobic Pond sewage backflow, finishes the treating processes to sewage; Control backflow flow velocity is 5～500mL/min, according to waste water quality type, the processing water yield and organic loading, by control water inlet flow velocity and backflow flow velocity, waste water is processed continuously, water outlet rear discharging up to standard in anaerobic pond and Aerobic Pond.In Fig. 1, mark B is water outlet.
Table 1
Table 2
| Embodiment | The waste water type | Inlet COD concentration (mg/L) | Effluent COD concentration (mg/L) | COD clearance (%) |
| 1 | Dyeing waste water | 305 | 15 | 95.08 |
| 2 | Dyeing waste water | 383 | 25 | 93.47 |
| 3 | Dyeing waste water | 476 | 35 | 92.65 |
| 4 | Dyeing waste water | 1842 | 82 | 95.55 |
| 5 | Dyeing waste water | 2582 | 91 | 96.48 |
| 6 | Dyeing waste water | 3227 | 98 | 96.96 |
The treatment effect that the operational condition of the waste water of embodiment 1～6 sees Table the waste water of 1, embodiment 1～6 sees Table 2.
Claims (10)
1. dyeing waste water Dynamic Membrane anaerobic-aerobic integrated online backwashing treatment process is characterized in that may further comprise the steps:
1) raw wastewater at first enters the anaerobic pond of the on-line Full back-purge system of Dynamic Membrane anaerobic-aerobic integratedization through equalizing tank;
2) place two groups of anaerobic dynamic films in anaerobic pond, agitator is established in the bottom, and anaerobic pond is by well heater and stir anaerobic pond bottom spoil disposal;
3) raw wastewater is from inside to outside through after being located at a group in two groups of anaerobic dynamic films in the anaerobic pond, after ecto-entad filters through another group again, enter Aerobic Pond, by switching the anaerobic dynamic film terminal valve, realize the exchange of two groups of anaerobic dynamic films, reach the purpose of online backwashing;
4) place two groups of aerobic Dynamic Membrane in Aerobic Pond, Aerobic Pond is when operation, and boring aeration pipe is equipped with in Aerobic Pond inside, by the aerator aeration, and Aerobic Pond bottom spoil disposal;
5) water after the aerobic treatment after ecto-entad filters through another group again, is finished processing from inside to outside through after in two groups of aerobic Dynamic Membrane one group, the discharge system, by switching the terminal valve of aerobic Dynamic Membrane, realize the exchange of two groups of aerobic Dynamic Membrane, reach the purpose of online backwashing.
2. dyeing waste water Dynamic Membrane anaerobic-aerobic integrated online backwashing treatment process as claimed in claim 1 is characterized in that in step 2) in, described anaerobic dynamic film adopts the anaerobic dynamic film of being made by industrial filter cloth.
3. dyeing waste water Dynamic Membrane anaerobic-aerobic integrated online backwashing treatment process as claimed in claim 2, it is characterized in that described industrial filter cloth is selected from least a in the long fibre of terylene short fiber, terylene, polyvinyl, the polypropylene fibre, the aperture of industrial filter cloth can be 10～300 μ m.
4. dyeing waste water Dynamic Membrane anaerobic-aerobic integrated online backwashing treatment process as claimed in claim 1 is characterized in that in step 2) in, the temperature of described well heater is 15～35 ℃.
5. dyeing waste water Dynamic Membrane anaerobic-aerobic integrated online backwashing treatment process as claimed in claim 1 is characterized in that in step 2) in, the speed of described stirring is 60～200r/min.
6. dyeing waste water Dynamic Membrane anaerobic-aerobic integrated online backwashing treatment process as claimed in claim 1 is characterized in that in step 4), and described aerobic Dynamic Membrane adopts the anaerobic dynamic film of being made by industrial filter cloth.
7. dyeing waste water Dynamic Membrane anaerobic-aerobic integrated online backwashing treatment process as claimed in claim 6, it is characterized in that described industrial filter cloth is selected from least a in the long fibre of terylene short fiber, terylene, polyvinyl, the polypropylene fibre, the aperture of industrial filter cloth can be 10～300 μ m.
8. dyeing waste water Dynamic Membrane anaerobic-aerobic integrated online backwashing treatment process as claimed in claim 1 is characterized in that in step 4), and the temperature of described Aerobic Pond when operation is 10～35 ℃.
9. dyeing waste water Dynamic Membrane anaerobic-aerobic integrated online backwashing treatment process as claimed in claim 1 is characterized in that in step 4) the aeration rate of described aeration is 0.5～5L/min, and the dissolved oxygen in the Aerobic Pond is DO 〉=2.0mg/L.
10. dyeing waste water Dynamic Membrane anaerobic-aerobic integrated online backwashing treatment process as claimed in claim 1, it is characterized in that in step 5), part of contaminated water in the described Aerobic Pond of finishing after the processing is drawn back to anaerobic pond by back water pump, to form the Aerobic Pond sewage backflow, finish the treating processes to sewage; Control backflow flow velocity can be 5～500mL/min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115043461A (en) * | 2022-06-15 | 2022-09-13 | 安徽舜禹水务股份有限公司 | Micro-porous filtering membrane device system for sewage treatment |
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