CN202849221U - Photocatalytic and internal circulation anaerobic fluidized membrane bioreactor - Google Patents
Photocatalytic and internal circulation anaerobic fluidized membrane bioreactor Download PDFInfo
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- CN202849221U CN202849221U CN 201220565193 CN201220565193U CN202849221U CN 202849221 U CN202849221 U CN 202849221U CN 201220565193 CN201220565193 CN 201220565193 CN 201220565193 U CN201220565193 U CN 201220565193U CN 202849221 U CN202849221 U CN 202849221U
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- membrane
- lift cylinder
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Abstract
The utility model relates to a photocatalytic and internal circulation anaerobic fluidized membrane bioreactor, comprising a reaction cylinder, a gas stripping cylinder, a three-phase separator and a membrane component, wherein a water inlet pipe and a gas inlet pipe are arranged at the bottom of the reaction cylinder; titanium dioxide light particles are arranged in the reaction cylinder; a biogas aeration disc, the gas stripping cylinder and the three-phase separator are arranged axially in the inner portion of the reaction cylinder from bottom to top; and an ultraviolet light source is arranged in the gas stripping cylinder. The photocatalytic and internal circulation anaerobic fluidized membrane bioreactor disclosed by the utility model couples a plurality of sewage treatment technologies, realizes efficient treatment of the non-biodegradable wastewater and achieves the purpose of recycling the wastewater, and is an efficient and practical sewage and wastewater treatment and recycle process.
Description
Technical field
The utility model relates to a kind of photochemical catalysis, internal circulating anaerobic fluidization membrane bio-reactor, belongs to the technical field of wastewater treatment and reuse.
Background technology
Shortage of water resources is one of the severeest resource problem of 21 century facing mankind, middle water reuse is one of important means of resource regeneration, compare with sea water desaltination, interbasin water transfer, middle water cost is minimum, and reuse of wastewater helps to improve the ecological environment, and realizes the benign cycle of Ecology.China's water resources critical shortage and skewness, water pollution problems are serious, and therefore, the regenerative use technology of carrying forward vigorously sewage and waste water is the inevitable course.
Sewage and waste water is processed the biological processes that adopt more at present, and wherein, the anaerobe technology has a extensive future because of its characteristics with production capacity.Anaerobic membrane bioreactor is the combination of anaerobe technology and membrane separation technique, anaerobism floc sludge or granule sludge can be removed the organic pollutant of bio-degradable in the sewage and waste water effectively, the membrane sepn effect can realize efficient solid-liquid separation, and further improves effluent quality.But anaerobic membrane bioreactor is to bio-refractory and the organic pollutant of bio-degradable (such as azo-compound, polychlorobiphenyl etc.) effect is very not little.Therefore, simple anaerobic membrane biosystem method has certain limitation in the treatment and reuse field of used water difficult to degradate.
Existing the dispose of sewage technology of waste water of internal circulating anaerobic membrane-biotechnology that adopts: Chinese patent CN102502957 discloses the internal circulation anaerobic film bioreactor in a kind of single reaction district, this device is the improvement to the internal-circulation anaerobic reactor in existing single reaction district, by reactor body, water inlet pipe, rising pipe, fall stream pipe, upspout, sludge out pipe and biogas pipe and form, establish dividing plate in the reaction zone main body, the reaction zone main body is divided into up and down two portions, and the bottom is reaction zone; Top is divided into falling by set second partition flows district and membrane module district.The prominent feature of this device is: membrane separation technique has been introduced on the basis at the internal-circulation anaerobic reactor that has the single reaction district now, realizes solid-liquid separation.The advantage of this device is: because the setting of membrane module, the volume in membrane module district is less than original settling region, so that the cubic capacity of reactor reduces; Realize that by membrane module solid-liquid separation has replaced original three phase separation precipitate and separate, effectively overcome the problem of the internal-circulation anaerobic reactor race mud in existing single reaction district, in this reactor, can obtain higher sludge concentration, improve the sewage and waste water processing efficiency.But the structure of reactor that this patent provides is complicated, and design, manufacturing and operative technique require high; Internal recycle is by upspout and fall the stream duct ligation and close realization, because caliber is thinner, blocks easily, and obstruction circulates; And this patent is not done further processing with regard to difficult degradation and nondegradable waste water yet.
The dispose of sewage technology of waste water of existing employing photocatalytic method: Chinese patent CN201762164U discloses a kind of suspension activated carbon photocatalysed ozone water processing unit and has belonged to tripping device, is comprised of light-catalyzed reaction cylinder, ultraviolet source and separator.Light-catalyzed reaction cylinder lower end cover is provided with water-in and inlet mouth, is provided with the gas nose cone in the inboard of lower capping, establishes sparger on its mouth of pipe, and guide shell is installed on gas nose cone top with one heart, and guide shell is outside for the light-catalyzed reaction cylinder, links with separator.Silica tube passes from the separator top, directly gos deep in the guide shell, and scolds the light lamp tube retaining plate to fix by purple.The ultraviolet tube peace turns in silica tube, and wire stretches out the outside.The utility model suspension activated carbon photocatalysed ozone water processing unit, make granulated active carbon be in the suspended motion state by gas stripping, realize that in a device solid catalyst and ultraviolet cooperating catalysis ozone generate hydroxyl radical free radical (OH), reactor efficiency is high; The liquid circulation that upwelling and down-welling district density difference forms, strengthened the effect of mass transmitting between ozonize gas and liquid, the liquid that falls simultaneously stream district becomes the effect of carrying secretly of ozonize gas to dirty sports, has increased ozonize gas residence time in reactor, has greatly improved the utilization ratio of ozone.This patent utilization O3 catalytic oxidation principle is processed described sewage and waste water, and it is higher that it processes raw materials cost, and certain toxicity is arranged; Solid catalyst and ultraviolet cooperating O3 catalytic oxidation realize organic inorganicization of the bio-refractories such as aromatic hydrocarbons, azo easily, but for the easy mineralization of organic material DeGrain of biochemical degradation such as saturated chain hydro carbons, can not realize easily processing when biochemical degradation and bio-refractory organic pollutant in the sewage and waste water.
The utility model content
For the deficiencies in the prior art, the utility model provides a kind of photochemical catalysis, internal circulating anaerobic fluidization membrane bio-reactor.The utility model combines improved internal circulating anaerobic fluidization membrane bio-reactor with the optically catalytic TiO 2 technology, both overcome the problem that existing internal circulation anaerobic film bioreactor easily blocks, also simplified structure of reactor, and realized simultaneously the processing of easy biochemical degradation and bio-refractory organic pollutant, the introducing of optically catalytic TiO 2 has also reduced the cost of catalyzed oxidation, has reduced reaction toxicity.
Explanation of technical terms:
Ultra-filtration membrane: be that a kind of aperture specification is consistent, specified pore diameter range is the micropore filtering film of 0.02 micron of 0.001 –.Side at film imposes suitable pressure, just can sift out the solute molecule less than the aperture, with the isolated molecule amount greater than 500 dalton, the particle diameter particle greater than 2 –, 20 nanometers.
The mechanism of optically catalytic TiO 2: TiO
2Belong to a kind of N-shaped semiconductor material, its energy gap is the 3.2ev(anatase octahedrite), when it was subject to light (UV-light) irradiation that wavelength is less than or equal to 387.5nm, the electronics of valence band will obtain the energy of photon and more front to conduction band, forms light induced electron (e
-); Then correspondingly form photohole (h in the valence band
+).If each TiO that is dispersed in the solution
2The approximate photoelectrochemical cell of regarding small-sized short circuit as of particle, then TiO is moved to respectively in light induced electron and the hole of photovoltaic effect generation under the effect of electric field
2The position that the surface is different.TiO
2The light induced electron e on surface
-Easily caught by oxidizing substances such as oxygen in water, and hole h
+The oxidable TiO that is adsorbed in then
2The organism on surface or elder generation are being adsorbed on TiO
2The OH on surface
-And H
2The O molecular oxygen changes into the OH free radical, and the oxidation capacity of OH free radical is the strongest in the oxygenant that exists in the water body, and organism and the inorganic pollutant of the overwhelming majority are inorganic molecules, CO with its mineralising in the energy oxidizing water
2And H
2The innoxious substances such as O.
The basic chemical reaction process of optically catalytic TiO 2 is as follows:
TiO
2Photocatalysis to degrade organic matter is in fact a kind of free radical reaction.
The technical solution of the utility model is as follows:
A kind of photochemical catalysis, internal circulating anaerobic fluidization membrane bio-reactor, comprise reaction tube, air lift cylinder, triphase separator and membrane module, be provided with water inlet pipe and inlet pipe (biogas recirculation pipe) in the bottom of described reaction tube, in reaction tube, place the light granules that is loaded with titanium dioxide; To being provided with biogas aeration plate, air lift cylinder and triphase separator from bottom to top, in described air lift cylinder, be provided with ultraviolet source at the inner shaft of reaction tube; Above described air lift cylinder, be covered with triphase separator, described triphase separator comprises guide shell and the umbrella pod that arranges from top to bottom, be provided with the water conservancy diversion edge of inside turnover at the outward flange of umbrella pod, the upper end of described guide shell is connected with outside escape pipe by the top cover of described reaction tube, and is connected with described biogas aeration plate by air pump; In described reaction tube and the position corresponding with described guide shell level be provided with membrane module, described membrane module links to each other with the rising pipe of outside by the reaction tube sidewall.
Preferred according to the utility model, the light granules cumulative volume that is loaded with titanium dioxide of placing in the described reaction tube is the 1/5-1/4 of reaction tube volume.The consumption that the purpose of selected filling titanium dioxide light granules is to guarantee titanium deoxide catalyst guarantees that photocatalysis effect reaches optimum between 3-5g/L.
Preferred according to the utility model, what described membrane module adopted is hollow fiber ultrafiltration membrane, and the specified aperture of ultra-filtration membrane is 0.01 micron.The utility model adopts hyperfiltration membrane assembly, places the clear water zone on reaction container top, and does not directly contact with anaerobic sludge, greatly reduces film and pollutes.
Preferred according to the utility model, described ultraviolet source is arranged on 1/3 place, bottom of air lift cylinder, and selecting ultraviolet source power is 300-500W.
Preferred according to the utility model, described reaction tube comprises tubular disengaging zone and the tubular lifting district that from top to bottom arranges, the internal diameter of described tubular disengaging zone is provided with inclination sedimentation edge greater than the internal diameter in described tubular lifting district between described tubular disengaging zone and the tubular lifting district.The internal diameter in described tubular lifting district is less than the purpose of the internal diameter of tubular disengaging zone, described current rise to the tubular disengaging zone along the air lift cylinder of less internal diameter, its internal diameter increases so that flow rate of water flow is slow falls, be throw out in the described waste water current is settled down to reaction tube along tubular lifting district bottom, accelerate effect of settling.
Preferred according to the utility model, the level attitude on described inclination sedimentation edge is lower than the level attitude on described water conservancy diversion edge.
Preferred according to the utility model, the volumetric loading of described photochemical catalysis, internal circulating anaerobic fluidization membrane bio-reactor is 6-20g (COD)/Ld.
The utility model has the advantage of:
The utility model is combined described optically catalytic TiO 2 technology with technology of biological membrane, hardly degraded organic substance in the waste water is converted into first the simple organic compound of easy biochemical degradation through the optically catalytic TiO 2 effect, again through the anaerobe effect, be converted into biogas, not only the biodegradable material in the waste water can be processed smoothly, can also not biodegradable material in the waste water effectively be removed by continuous backflow catalysis.Utilize reactor described in the utility model that waste water is processed: wherein the clearance of biodegradable material is more than 90%, the transformation efficiency of described not biodegradable material is 90-95%, clearance is more than 90%, waste water after treatment can be directly as in the water reuse.The utility model multiple sewage disposal technology that has been coupled has been realized the efficient processing of used water difficult to degradate, has reached the purpose of waste water recycling, is a kind of efficient, practical sewage and waste water treatment and reuse technique.
Description of drawings
Fig. 1 is the structural representation of reactor described in the utility model.
Among the figure: 1. reaction tube; 1-1. tubular disengaging zone; 1-2. tubular lifting district; 1-3. inclination sedimentation; 2. triphase separator; 2-1. guide shell; 2-2. umbrella pod; 2-3. water conservancy diversion edge; 3. air lift cylinder; 4. water inlet pipe; 5. membrane module; 6. rising pipe; 7. constant flow pump; 8. escape pipe; 9. biogas bubble, 10. titanium dioxide light granules; 11. ultraviolet source; 12. biogas aeration plate; 13. gas meter; 14. air pump.
Embodiment
Further specify below in conjunction with accompanying drawing 1 and embodiment, but be not limited to this.
Used titanium dioxide light granules is the activated carbon granule that load has titanium dioxide in following examples, and the tap density of described titanium dioxide light granules is that 0.3-0.5kg/L, specific surface are 1500-2000m
2/ g, particle size range 2-4mm, water-intake rate are 300-450%; Described titanium dioxide light granules comprises following raw material by weight percentage:
Activated carbon granule: 80-90 part;
Titanium dioxide: 4-8 part.
The preparation method of described titanium dioxide light granules comprises that step is as follows:
(1) uses the magnetic force thermostatic mixer under 25 ℃, analytically pure butyl (tetra) titanate, analytically pure glacial acetic acid to be added in the dehydrated alcohol successively, stir 15 ~ 20min, obtain the yellow solution of homogeneous transparent; The volume parts of described butyl (tetra) titanate, glacial acetic acid and dehydrated alcohol is respectively:
Butyl (tetra) titanate: 5 parts;
Glacial acetic acid: 1 part;
Dehydrated alcohol: 15 parts;
(2) continue to stir, add the salpeter solution that accounts for the yellow solution volume percent 1-2% that obtains in the step (1), the concentration of described salpeter solution is 65-68wt%; Add the ethanolic soln that accounts for the yellow solution volume percent 25-27% that obtains in the step (1), the concentration of described ethanolic soln is 90-95wt%, continues to stir 1-1.5h, obtains TiO 2 sol;
(3) activated carbon granule is immersed in the TiO 2 sol of step (2) preparation, abundant dipping, after then lifting out in baking oven in 105 ℃ of lower oven dry 2-3h, be plated film once; Repeating step is (3) 2 times again, is plated film three times;
(4) activated carbon granule with plated film three times places quartz tube furnace, passes into nitrogen as protection gas, and calcining at constant temperature 4-5h under 500-600 ℃ of condition makes the titanium dioxide firm attachment on activated carbon granule, namely gets the titanium dioxide light granules.
Before waste water is processed, described titanium dioxide light granules is carried out microbial film cultivate, comprise that step is as follows:
(1) light granules of the titanium dioxide of above-mentioned preparation is mixed with volume ratio 1:3-1:4 with anaerobic sludge adds reaction tube, close ultraviolet source, take pending waste water as culture medium;
(2) the lower domestication 1 month in pending waste water realized titanium dioxide light granules surface and internal voids biofilm.Then ultraviolet lamp is opened, other conditions are constant, continue the operation reactor, under the effect of ultraviolet lamp, the organism of difficult degradation is degraded in the waste water, and the microorganism of while particle surface is inactivation gradually, only realizes the organic degraded of bio-degradable by inner microbial film.After the biofilm, be loaded with the activated carbon granule of titanium dioxide, microorganism (dry weight) accounts for 2%-10%.
Embodiment 1,
A kind of photochemical catalysis, internal circulating anaerobic fluidization membrane bio-reactor, comprise reaction tube 1, air lift cylinder 3, triphase separator 2 and membrane module 5, be provided with water inlet pipe 4 and inlet pipe in the bottom of described reaction tube 1, be loaded with the light granules 10 of titanium dioxide in reaction tube 1 interior placement; To being provided with biogas aeration plate 12, air lift cylinder 3 and triphase separator from bottom to top, in described air lift cylinder 3, be provided with ultraviolet source 11 at the inner shaft of reaction tube 1; Above described air lift cylinder 3, be covered with triphase separator 2, described triphase separator 2 comprises guide shell 2-1 and the umbrella pod 2-2 that arranges from top to bottom, outward flange at the umbrella pod is provided with the water conservancy diversion of inside turnover along 2-3, the upper end of described guide shell 2-1 is connected with outside escape pipe 8 by the top cover of described reaction tube 1, and is connected with described biogas aeration plate 12 by air pump 14; In described reaction tube 1 and the position corresponding with described guide shell 2-1 level be provided with membrane module 5, described membrane module 5 links to each other with the rising pipe 6 of outside by reaction tube 1 sidewall.Described reaction tube 1 comprises tubular disengaging zone 1-1 and the tubular lifting district 1-2 that from top to bottom arranges, the internal diameter of described tubular disengaging zone 1-1 is provided with the inclination sedimentation along 1-3 greater than the internal diameter of described tubular lifting district 1-2 between described tubular disengaging zone 1-1 and the tubular lifting district 1-2.Described inclination sedimentation is lower than described water conservancy diversion along the level attitude of 2-3 along the level attitude of 1-3.
The light granules cumulative volume that is loaded with titanium dioxide of placing in the described reaction tube is 1/5 of reaction tube volume.What described membrane module adopted is hollow fiber ultrafiltration membrane, and the specified aperture of ultra-filtration membrane is 0.01 micron.Described ultraviolet source is arranged on 1/3 place, bottom of air lift cylinder, and selecting ultraviolet source power is 300W.
Utilize embodiment 1 described reactor for treatment azo Reactive blue dyeing waste water, COD in the waste water
CrContent be 600-800mg/L, BOD/COD＜0.18; Reactor temperature maintains 35 ± 1 ℃; Concrete grammar comprises that step is as follows:
(1) treats that waste water enters reaction tube 1 via the water inlet pipe of reaction tube 1 bottom, the circulation methane gas enters the air lift cylinder by the inlet pipe of reaction tube bottom, under the effect of water inlet flow velocity and gas lift power, the titanium dioxide light granules in waste water and the reaction tube is mixed into composite waste;
(2) composite waste in the described step (1) enters air lift cylinder 3, and under ultraviolet source 11 irradiations, under the Titanium Dioxide effect, the refractory organic in the composite waste is degraded to the bio-degradable compound;
(3) composite waste is along the umbrella pod 2-2 that flow to described triphase separator 2 on the air lift cylinder 3, returned by described umbrella pod 2-2 that to block to the air lift cylinder outside, to fall stream district along annular between reaction tube and the air lift cylinder 2 dirty for described composite waste under action of gravity, and reflux under the effect of inner/outer tube pressure difference in reaction tube 1 bottom and to be repeated in the air lift cylinder, constantly reflux course has been realized the abundant contact reacts of waste water and titanium dioxide light granules;
The bio-degradable organism produces biogas in the waste water; Under the katalysis of titanium dioxide light granules, ultraviolet source 11 irradiations produce hydroxyl radical free radical the not biodegradable material in the waste water are carried out the oxidative degradation processing; The utility model utilizes the optically catalytic TiO 2 effect that the heavy metal in the sewage and oxide compound etc. are degraded to non-toxic substance, the hardly degraded organic substance in the waste water are converted into the simple organic compound of easy biochemical degradation;
(4) described biogas, waste water and titanium dioxide light granules are separated from each other on the top of reaction tube: biogas is collected after escape pipe is discharged along the guide shell effusion reaction tube of triphase separator, the part circulation; Throw out in the waste water and the sedimentation of titanium dioxide light granules are back to the reaction tube bottom; Discharge through rising pipe under via membrane module, suction function at constant flow pump through the supernatant liquor of output after the sedimentation at the top of reaction tube waste water.
The volumetric loading of described photochemical catalysis, internal circulating anaerobic fluidization membrane bio-reactor is 6g (COD)/Ld.The apparent velocity of biogas is 20mm/s in the reactor.
Detect through certain the azo Reactive blue dyeing waste water after the described reactor for treatment of present embodiment, wherein COD
CrContent is down to below the 50mg/L, and the COD clearance reaches more than 90%, and percent of decolourization reaches more than 95%.
Claims (6)
1. a photochemical catalysis, internal circulating anaerobic fluidization membrane bio-reactor, it is characterized in that, this reactor comprises reaction tube, air lift cylinder, triphase separator and membrane module, is provided with water inlet pipe and inlet pipe in the bottom of described reaction tube, places the light granules that is loaded with titanium dioxide in reaction tube; To being provided with biogas aeration plate, air lift cylinder and triphase separator from bottom to top, in described air lift cylinder, be provided with ultraviolet source at the inner shaft of reaction tube; Above described air lift cylinder, be covered with triphase separator, described triphase separator comprises guide shell and the umbrella pod that arranges from top to bottom, be provided with the water conservancy diversion edge of inside turnover at the outward flange of umbrella pod, the upper end of described guide shell is connected with outside escape pipe by the top cover of described reaction tube, and is connected with described biogas aeration plate by air pump; In described reaction tube and the position corresponding with described guide shell level be provided with membrane module, described membrane module links to each other with the rising pipe of outside by the reaction tube sidewall.
2. a kind of photochemical catalysis according to claim 1, internal circulating anaerobic fluidization membrane bio-reactor is characterized in that, the light granules cumulative volume that is loaded with titanium dioxide of placing in the described reaction tube is the 1/5-1/4 of reaction tube volume.
3. a kind of photochemical catalysis according to claim 1, internal circulating anaerobic fluidization membrane bio-reactor is characterized in that, what described membrane module adopted is hollow fiber ultrafiltration membrane, and the specified aperture of ultra-filtration membrane is 0.01 micron.
4. a kind of photochemical catalysis according to claim 1, internal circulating anaerobic fluidization membrane bio-reactor is characterized in that, described ultraviolet source is arranged on 1/3 place, bottom of air lift cylinder, and selecting ultraviolet source power is 300-500W.
5. a kind of photochemical catalysis according to claim 1, internal circulating anaerobic fluidization membrane bio-reactor, it is characterized in that, described reaction tube comprises tubular disengaging zone and the tubular lifting district that from top to bottom arranges, the internal diameter of described tubular disengaging zone is provided with inclination sedimentation edge greater than the internal diameter in described tubular lifting district between described tubular disengaging zone and the tubular lifting district; The level attitude on described inclination sedimentation edge is lower than the level attitude on described water conservancy diversion edge.
6. a kind of photochemical catalysis according to claim 1, internal circulating anaerobic fluidization membrane bio-reactor is characterized in that, the volumetric loading of described photochemical catalysis, internal circulating anaerobic fluidization membrane bio-reactor is 6-20g (COD)/Ld.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220565193 CN202849221U (en) | 2012-10-30 | 2012-10-30 | Photocatalytic and internal circulation anaerobic fluidized membrane bioreactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220565193 CN202849221U (en) | 2012-10-30 | 2012-10-30 | Photocatalytic and internal circulation anaerobic fluidized membrane bioreactor |
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| CN202849221U true CN202849221U (en) | 2013-04-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105016446A (en) * | 2015-08-10 | 2015-11-04 | 北京格兰特膜分离设备有限公司 | Gas stripping circulation three-phase reaction device and sewage treatment method |
| CN108467110A (en) * | 2018-03-23 | 2018-08-31 | 北京工业大学 | The apparatus and method of photosynthetic bacteria processing soybean wastewater are utilized under infrared light anaerobic condition |
| CN114455700A (en) * | 2022-01-20 | 2022-05-10 | 扬州大学 | Anaerobic reactor baffled water outlet device |
-
2012
- 2012-10-30 CN CN 201220565193 patent/CN202849221U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105016446A (en) * | 2015-08-10 | 2015-11-04 | 北京格兰特膜分离设备有限公司 | Gas stripping circulation three-phase reaction device and sewage treatment method |
| CN108467110A (en) * | 2018-03-23 | 2018-08-31 | 北京工业大学 | The apparatus and method of photosynthetic bacteria processing soybean wastewater are utilized under infrared light anaerobic condition |
| CN114455700A (en) * | 2022-01-20 | 2022-05-10 | 扬州大学 | Anaerobic reactor baffled water outlet device |
| CN114455700B (en) * | 2022-01-20 | 2023-12-08 | 扬州大学 | Anaerobic reactor baffling water outlet device |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20130403 Effective date of abandoning: 20141022 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20130403 Effective date of abandoning: 20141022 |
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| RGAV | Abandon patent right to avoid regrant |