CN103073150B - Photocatalytic postposed internal-circulation anaerobic fluidized membrane bioreactor and working method thereof - Google Patents

Photocatalytic postposed internal-circulation anaerobic fluidized membrane bioreactor and working method thereof Download PDF

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CN103073150B
CN103073150B CN201210583164.2A CN201210583164A CN103073150B CN 103073150 B CN103073150 B CN 103073150B CN 201210583164 A CN201210583164 A CN 201210583164A CN 103073150 B CN103073150 B CN 103073150B
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membrane
titanium dioxide
reactor
reaction tube
sewage
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CN103073150A (en
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王燕
韩绮
马德方
闫晗
高宝玉
岳钦艳
李倩
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Shandong University
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Shandong University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The invention relates to a photocatalytic postposed internal-circulation anaerobic fluidized membrane bioreactor. The photocatalytic postposed internal-circulation anaerobic fluidized membrane bioreactor comprises a reaction barrel, a gas stripping barrel, a three-phase separator and a membrane assembly, wherein a water inlet pipe and a gas inlet pipe are arranged at the bottom of the reaction barrel; and the membrane assembly is a cylindrical ceramic membrane loaded with nano-titanium dioxide particles, or the membrane assembly is a hollow fiber ultrafiltration membrane of which a light titanium dioxide particle mesh is hung on the outer surface. The invention further discloses a working method of the photocatalytic postposed internal-circulation anaerobic fluidized membrane bioreactor. An internal-circulation anaerobic treatment technology and a titanium dioxide photocatalytic technology are combined, and advantages of an anaerobic membrane bioreactor and a photocatalytic bioreactor are combined, so that quality of outlet water is obviously improved; and the membrane assembly is arranged at a supernatant part of a three-phase separation zone and doses not directly contact sludge, and nano-titanium dioxide has a photocatalytic effect, so that membrane pollution is greatly reduced, the service life of the membrane assembly is prolonged, and manpower and material resources required in a membrane replacing cycle are reduced.

Description

A kind of internal circulating anaerobic fluidization membrane bio-reactor and method of work thereof of photochemical catalysis postposition
Technical field
The present invention relates to a kind of internal circulating anaerobic fluidization membrane bio-reactor and method of work thereof of photochemical catalysis postposition, belong to the technical field of wastewater treatment and reuse.
Background technology
Sewage and waste water is processed the biological processes that adopt more at present, and wherein, anaerobe technology, because of its feature with production capacity, has a extensive future.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 sewage and waste water effectively, 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 (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.
The dispose of sewage technology of waste water of existing employing internal circulating anaerobic membrane-biotechnology: Chinese patent CN102502957 discloses the internal circulation anaerobic film bioreactor in a kind of single reaction district, this device is the improvement of the internal-circulation anaerobic reactor to existing single reaction district, by reactor body, water inlet pipe, rising pipe, fall stream pipe, upspout, sludge out pipe and biogas pipe and form, in the main body of reaction zone, establish dividing plate, reaction zone main body is divided into upper and lower two portions, and bottom is reaction zone; Top is divided into Jiang Liu district and membrane module district by set second partition.The prominent feature of this device is: on the basis of the internal-circulation anaerobic reactor in existing single reaction district, introduced membrane separation technique, realized solid-liquid separation.The advantage of this device is: due to the setting of membrane module, the volume in membrane module district is less than original settling region, and the cubic capacity of reactor is reduced; Realize solid-liquid separation by membrane module and 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 sewage and waste water processing efficiency.But the structure of reactor complexity that this patent provides, design, manufacture and operative technique require high; Internal recycle by upspout and fall stream duct ligation close realization, because caliber is thinner, easily block, obstruction circulate; And this patent is not also done further processing with regard to difficult degradation and nondegradable waste water.
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 belonged to tripping device, is made up 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 gas nose cone in the inner side of lower capping, on its mouth of pipe, establishes sparger, and guide shell is installed on gas nose cone top with one heart, and guide shell is outside for light-catalyzed reaction cylinder, is connected with separator.Silica tube passes from separator top, directly gos deep in guide shell, and scolds light lamp tube retaining plate to fix by purple.Ultraviolet tube peace turns in silica tube, and wire stretches out outside.Suspension activated carbon photocatalysed ozone water processing unit of the present invention, makes granulated active carbon in suspended motion state by gas stripping, realizes solid catalyst and ultraviolet cooperating catalysis ozone and generate hydroxyl radical free radical (OH) in a device, and reactor efficiency is high; The liquid circulation that upwelling and down-welling district density difference forms, strengthen the effect of mass transmitting between ozonize gas and liquid, the liquid in Jiang Liu district becomes the effect of carrying secretly of ozonize gas to dirty sports simultaneously, 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 have certain toxicity; Solid catalyst and ultraviolet cooperating O3 catalytic oxidation easily realize organic inorganicization of the bio-refractory such as aromatic hydrocarbons, azo, but for the mineralization of organic material DeGrain of the easy biochemical degradations such as saturated chain hydro carbons, when can not realizing easy biochemical degradation in sewage and waste water and bio-refractory organic pollutant, process.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of internal circulating anaerobic fluidization membrane bio-reactor of photochemical catalysis postposition.
The present invention also discloses a kind of method of work of utilizing above-mentioned reactor for treatment sewage.
Explanation of technical terms:
Ceramic membrane: being the one of solid film, is mainly Al 2o 3, Zr0 2, Ti0 2and Si0 2the porous-film of preparing etc. inorganic materials, its aperture is 2-50nm.There is chemical stability good, can acidproof, alkaline-resisting, organic solvent-resistant, physical strength is large, can counterflush, anti-microbe ability is strong, high temperature resistant, and pore size distribution is narrow, separation efficiency high.
The mechanism of optically catalytic TiO 2: TiO 2belong to a kind of N-shaped semiconductor material, its energy gap is 3.2ev(anatase octahedrite), in the time that it is subject to light (UV-light) that wavelength is less than or equal to 387.5nm and irradiates, the electronics of valence band will obtain the energy of photon and more front to conduction band, forms light induced electron (e -); In valence band, correspondingly form photohole (h +).If each TiO being dispersed in solution 2the approximate photoelectrochemical cell of regarding small-sized short circuit as of particle, light induced electron and hole that photovoltaic effect produces move to respectively TiO under the effect of electric field 2the position that 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 2the organism on surface or first being adsorbed on TiO 2the OH on surface -and H 2o molecular oxygen changes into OH free radical, and the oxidation capacity of OH free radical is the strongest in the oxygenant existing in water body, and in energy oxidizing water, organism and the inorganic pollutant of the overwhelming majority, be inorganic molecules, CO by its mineralising 2and H 2the innoxious substances such as O.
The basic chemical reaction process of optically catalytic TiO 2 is as follows:
TiO 2+h ν→TiO 2+h ++e - (1)
h ++e -→heat or h ν (2)
h ++OH -→·OH (3)
h ++H 2O→·OH+H + (4)
OH+ organism → → CO 2+ H 2o (5)
TiO 2photocatalysis to degrade organic matter is in fact a kind of free radical reaction.
Technical scheme of the present invention is as follows:
An internal circulating anaerobic fluidization membrane bio-reactor for photochemical catalysis postposition, 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; At the inner shaft of reaction tube to being provided with biogas aeration plate, air lift cylinder and triphase separator from bottom to top; Above described air lift cylinder, be covered with triphase separator, described triphase separator comprises the guide shell and the umbrella pod that arrange 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 on the position corresponding with described guide shell level, be provided with membrane module, described membrane module is connected with outside rising pipe by reaction tube sidewall; It is characterized in that, described membrane module is the cylinder-shaped ceramic film that load has titanium dioxide nanoparticle, or described membrane module is the hollow fiber ultrafiltration membrane that appearance is linked with titanium dioxide light granules net;
Outside described membrane module, a sheathed hollow out support is provided with ultraviolet source on described hollow out support;
The titanium dioxide light granules net hanging on the surface of described hollow fiber ultrafiltration membrane, comprises the netting twine that longitude and latitude is arranged, and is linked with titanium dioxide light granules on described netting twine.The present invention is the clear water zone, top at described reactor by described membrane module, titanium dioxide granule and ultraviolet source integrated setting, directly do not contact with anaerobic sludge, by described light-catalyzed reaction program postposition, in the time that sewage is discharged, by photochemical catalysis, the hard-degraded substance of remnants in sewage is carried out to photocatalytic degradation, not only greatly reduce film and pollute but also can efficiently remove the material of difficult degradation in sewage.
Preferred according to the present invention, the diameter range of described titanium dioxide light granules: 2-4mm.
Preferred according to the present invention, described netting twine is net bag-shaped and is set in the outside surface of described hollow fiber ultrafiltration membrane.
Preferred according to the present invention, the specified aperture of described hollow fiber ultrafiltration membrane is 0.01 micron.
Preferred according to the present invention, when described membrane module is load while having the cylinder-shaped ceramic film of titanium dioxide nanoparticle, the weight of described titanium dioxide nanoparticle is according to the cumulative volume load of disposing of sewage: 1 liter of sewage load 3-5g titanium dioxide nanoparticle of every processing; When described membrane module is appearance while being linked with the hollow fiber ultrafiltration membrane of titanium dioxide light granules net, the cumulative volume of described titanium dioxide light granules is the 1/5-1/4 of hollow fiber ultrafiltration membrane cumulative volume.The advantage of design is herein, and while guaranteeing to dispose of sewage, it is optimum that its photocatalysis effect reaches.
Preferred according to the present invention, the specified aperture of described cylinder-shaped ceramic film is 2-50 nanometer.
Preferred according to the present invention, the quantity of described ultraviolet source is four, is separately positioned on described hollow out support, and the power of described single ultraviolet source is 20-60W.
Preferred according to the present invention, described reaction tube comprises the tubular disengaging zone and the tubular lifting district that from top to bottom arrange, the internal diameter of described tubular disengaging zone is greater than the internal diameter in described tubular lifting district, between described tubular disengaging zone and tubular lifting district, is provided with inclination sedimentation edge.The object that the internal diameter in described tubular lifting district is less than the internal diameter of tubular disengaging zone is, described current rise to tubular disengaging zone along the air lift cylinder of less internal diameter, its internal diameter increases and makes that flow rate of water flow is slow to fall, be throw out in described waste water current is settled down to reaction tube bottom along tubular lifting district, accelerate effect of settling.
Preferred according to the present invention, the level attitude on described inclination sedimentation edge is lower than the level attitude on described water conservancy diversion edge.
Preferred according to the present invention, the volumetric loading of the internal circulating anaerobic fluidization membrane bio-reactor of described photochemical catalysis postposition is 6-20g (COD)/Ld.
Utilize a method of work for above-mentioned reactor for treatment sewage, comprise that step is as follows:
(1) in reaction tube, add anaerobic activated sludge by filling out mud material mouth, add anaerobic sludge volume account for 1/6-1/5 of whole reaction tube volume; Sheathed hollow out support outside membrane module, opens the ultraviolet source on hollow out support;
(2) open water-in, in reaction tube, inject sewage; Open biogas aeration plate, in reaction tube, inject biogas;
(3) sewage rises to triphase separator along air lift cylinder: biogas is discharged along triphase separator, escape pipe; Throw out in sewage is along the space sedimentation of ring air lift cylinder, and reacts with described active sludge generation anaerobe;
(5) the clear liquid part in sewage is detained on the top of reaction tube, and sewage clear liquid filters by membrane module and under titanium dioxide, light-catalysed effect, finally discharges along rising pipe;
(6) the dirty sewage in space of edge ring air lift cylinder continues to be back to the bottom of air lift cylinder, repeating step (3).
The invention has the advantages that:
The present invention is combined described optically catalytic TiO 2 technology with membrane Bio-reactor Technology, by labile organic compound in waste water first through anaerobe effect, be converted into biogas, hardly degraded organic substance and microbial metabolites are removed through follow-up optically catalytic TiO 2 effect.Not biodegradable material in can also processing waste water smoothly by continuous backflow catalysis in the biodegradable material of the present invention in effective removal waste water.Utilize reactor of the present invention to process waste water: 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 water reuse.The present invention's multiple sewage disposal technology that has been coupled, has realized the efficient processing of used water difficult to degradate, has reached the object of waste water recycling, is a kind of efficient, practical sewage and waste water treatment and reuse technique.
The present invention combines improved internal circulating anaerobic fluidization membrane bio-reactor with 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 the processing of easy biochemical degradation and bio-refractory organic pollutant simultaneously, the introducing of optically catalytic TiO 2 has also reduced the cost of catalyzed oxidation, has reduced reaction toxicity.
Brief description of the drawings
Fig. 1 is the structural representation of reactor of the present invention;
Fig. 2 is the structural representation of membrane module described in the embodiment of the present invention 1;
Fig. 3 is the structural representation of membrane module described in the embodiment of the present invention 2;
In Fig. 1: 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 sources; 12. biogas aeration plates; 13. gas meters; 14. inlet pipe; 15, fill out mud material mouth; 16, blowdown pug mouth.
In Fig. 2, Fig. 3,5-1, ceramic membrane; 5-2, hollow out support; 5-3, hollow fiber ultrafiltration membrane; 5-4, titanium dioxide light granules net; The netting twine that 5-5, longitude and latitude are arranged.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described, but be not limited to this.The volumetric loading of the internal circulating anaerobic fluidization membrane bio-reactor of the postposition of photochemical catalysis described in following examples is 6-20g (COD)/Ld.
Embodiment 1,
As shown in Figure 1-2.
An internal circulating anaerobic fluidization membrane bio-reactor for photochemical catalysis postposition, comprises reaction tube 1, air lift cylinder 3, triphase separator 2 and membrane module 5, is provided with water inlet pipe 4 and inlet pipe 14 in the bottom of described reaction tube 1; At the inner shaft of reaction tube 1 to being provided with biogas aeration plate 12, air lift cylinder 3 and triphase separator 2 from bottom to top; Above described air lift cylinder 3, be covered with triphase separator 2, described triphase separator 2 comprises the guide shell 2-1 and the umbrella pod 2-2 that arrange from top to bottom, the water conservancy diversion that is provided with inside turnover at the outward flange of umbrella pod 2-2 is 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; In described reaction tube 1 and on the position corresponding with described guide shell 2-1 level, be provided with membrane module 5, described membrane module 5 is connected with outside rising pipe 6 by reaction tube 1 sidewall; Described membrane module 5 has the cylinder-shaped ceramic film 5-1 of titanium dioxide nanoparticle for load; At the outer sheathed hollow out support 5-2 of described membrane module 5, on described hollow out support 5-2, be provided with ultraviolet source 11; The weight of described titanium dioxide nanoparticle is according to the cumulative volume load of disposing of sewage: 1 liter of sewage load 3-5g titanium dioxide nanoparticle of every processing; The specified aperture of described cylinder-shaped ceramic film 5-1 is 2-50 nanometer.The quantity of described ultraviolet source 11 is four, is separately positioned on described hollow out support 5-2 upper, and the power of described single ultraviolet source 11 is 20-60W.
Described reaction tube 1 comprises the tubular disengaging zone 1-1 and the tubular lifting district 1-2 that from top to bottom arrange, the internal diameter of described tubular disengaging zone 1-1 is greater than the internal diameter of described tubular lifting district 1-2, between described tubular disengaging zone 1-1 and tubular lifting district 1-2, is provided with inclination sedimentation along 1-3.Described inclination sedimentation along the level attitude of 1-3 lower than described water conservancy diversion the level attitude along 2-3.
Wherein, the preparation method of described load nano-titanium dioxide particulate ceramic film, comprises that step is as follows:
A. under vigorous stirring, the butyl (tetra) titanate that is 25-50mL by volume is added drop-wise in the dehydrated alcohol that volume is 80-100mL, stirs through 10-30min, obtains homogeneous transparent solution A;
B. the 1.0%-2.5% citric acid solution of massfraction concentration is slowly added in solution A, vigorous stirring 30-60min, obtains solution B;
C. be that 0.2%-1.0% liquor alumini chloridi is slowly added drop-wise in solution B by deionized water and massfraction concentration, vigorous stirring 40-60min, makes and mixes aluminium nano TiO 2 colloidal solution;
D. according to prior art, with α-Al 2o 3for aggregate, add pore former, binding agent, sinters carrier into after extrusion molding;
E. after described carrier being immersed in the colloidal solution of mixing aluminium, take out, being then placed in relative humidity is 65%, and temperature is dry 12-20 hour under the condition of 18~25 DEG C;
F. will be placed in resistance furnace 2 hours through step e carrier after treatment, and close electric furnace, described carrier, with stove naturally cooling, is made the ceramic membrane of load nano-titanium dioxide particle; Wherein furnace temperature is 400-600 DEG C.
Embodiment 2,
As shown in Figure 1,3.
The internal circulating anaerobic fluidization membrane bio-reactor of photochemical catalysis postposition as described in Example 1, its difference is, described membrane module 5 is linked with the hollow fiber ultrafiltration membrane 5-3 of titanium dioxide light granules net 5-4 for appearance; Described titanium dioxide light granules net 5-4, comprises the netting twine 5-5 that longitude and latitude is arranged, and on described netting twine 5-5, is linked with titanium dioxide light granules 10.The diameter range of described titanium dioxide light granules 5-4: 2-4mm.
Described netting twine 5-5 is net bag-shaped and is set in the outside surface of described hollow fiber ultrafiltration membrane 5-3.The specified aperture of described hollow fiber ultrafiltration membrane 5-3 is 0.01 micron.The cumulative volume of described titanium dioxide light granules is 1/5 of hollow fiber ultrafiltration membrane cumulative volume.
Wherein, the preparation method of described titanium dioxide light granules, comprises that step is as follows:
(1) use magnetic force thermostatic mixer at 25 DEG C, analytically pure butyl (tetra) titanate, analytically pure glacial acetic acid to be added in 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 of the yellow solution volume percent 1-2% obtaining in 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% obtaining in step (1), the concentration of described ethanolic soln is 90-95wt%, continues to stir 1-1.5h, obtains TiO 2 sol;
(3) gac is immersed in TiO 2 sol prepared by step (2), fully dipping is dried 2-3h after then lifting out in baking oven at 105 DEG C, is plated film once; Repeating step (3) 2 times, is plated film three times again;
(4) activated carbon granule of plated film three times is placed in to quartz tube furnace; pass into nitrogen as protection gas; calcining at constant temperature 4-5h under 500-600 DEG C of condition; make titanium dioxide firm attachment on gac; obtain titanium dioxide light granules, 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 is 300-450%.
Embodiment 3,
A method of work of utilizing reactor for treatment sewage as described in embodiment 1 or embodiment 2, comprises that step is as follows:
(1) by filling out mud material mouth 15 to 1 adding anaerobic activated sludge in reaction tube, add anaerobic sludge volume account for 1/6-1/5 of whole reaction tube 1 volume; At the outer sheathed hollow out support 5-2 of membrane module 5, open the ultraviolet source 11 on hollow out support;
(2) open water-in 4, to the interior injection sewage of reaction tube 1; Open biogas aeration plate 12, to the interior injection biogas of reaction tube 1;
(3) sewage rises to triphase separator 2 along air lift cylinder 3: biogas is discharged along triphase separator 2, escape pipe 8; Throw out in sewage is along the space sedimentation of ring air lift cylinder 3, and reacts with described active sludge generation anaerobe;
(4) the clear liquid part in sewage is detained on the top of reaction tube 1, and sewage clear liquid filters by membrane module 5 and under titanium dioxide, light-catalysed effect, finally discharges along rising pipe 6;
(5) the dirty sewage in space of edge ring air lift cylinder 3 continues to be back to the bottom of air lift cylinder 3, repeating step (3).

Claims (10)

1. an internal circulating anaerobic fluidization membrane bio-reactor for photochemical catalysis postposition, 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; At the inner shaft of reaction tube to being provided with biogas aeration plate, air lift cylinder and triphase separator from bottom to top; Above described air lift cylinder, be covered with triphase separator, described triphase separator comprises the guide shell and the umbrella pod that arrange 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 on the position corresponding with described guide shell level, be provided with membrane module, described membrane module is connected with outside rising pipe by reaction tube sidewall; It is characterized in that, described membrane module is the cylinder-shaped ceramic film that load has titanium dioxide nanoparticle, or described membrane module is the hollow fiber ultrafiltration membrane that appearance is linked with titanium dioxide light granules net; Outside described membrane module, a sheathed hollow out support is provided with ultraviolet source on described hollow out support; The titanium dioxide light granules net hanging on the surface of described hollow fiber ultrafiltration membrane, comprises the netting twine that longitude and latitude is arranged, and is linked with titanium dioxide light granules on described netting twine.
2. the internal circulating anaerobic fluidization membrane bio-reactor of a kind of photochemical catalysis postposition according to claim 1, is characterized in that the diameter range of described titanium dioxide light granules: 2-4mm.
3. the internal circulating anaerobic fluidization membrane bio-reactor of a kind of photochemical catalysis postposition according to claim 1, is characterized in that, described netting twine is net bag-shaped and is set in the outside surface of described hollow fiber ultrafiltration membrane.
4. the internal circulating anaerobic fluidization membrane bio-reactor of a kind of photochemical catalysis postposition according to claim 1, is characterized in that, the specified aperture of described hollow fiber ultrafiltration membrane is 0.01 micron; The specified aperture of described cylinder-shaped ceramic film is 2-50 nanometer.
5. the internal circulating anaerobic fluidization membrane bio-reactor of a kind of photochemical catalysis postposition according to claim 1, it is characterized in that, when described membrane module is load while having the cylinder-shaped ceramic film of titanium dioxide nanoparticle, the weight of described titanium dioxide nanoparticle is according to the cumulative volume load of disposing of sewage: 1 liter of sewage load 3-5g titanium dioxide nanoparticle of every processing; When described membrane module is appearance while being linked with the hollow fiber ultrafiltration membrane of titanium dioxide light granules net, the cumulative volume of described titanium dioxide light granules is the 1/5-1/4 of hollow fiber ultrafiltration membrane cumulative volume.
6. the internal circulating anaerobic fluidization membrane bio-reactor of a kind of photochemical catalysis postposition according to claim 1, it is characterized in that, the quantity of described ultraviolet source is four, is separately positioned on described hollow out support, and the power of described single ultraviolet source is 20-60W.
7. the internal circulating anaerobic fluidization membrane bio-reactor of a kind of photochemical catalysis postposition according to claim 1, it is characterized in that, described reaction tube comprises the tubular disengaging zone and the tubular lifting district that from top to bottom arrange, the internal diameter of described tubular disengaging zone is greater than the internal diameter in described tubular lifting district, between described tubular disengaging zone and tubular lifting district, is provided with inclination sedimentation edge.
8. the internal circulating anaerobic fluidization membrane bio-reactor of a kind of photochemical catalysis postposition according to claim 1, is characterized in that, the level attitude on described inclination sedimentation edge is lower than the level attitude on described water conservancy diversion edge.
9. the internal circulating anaerobic fluidization membrane bio-reactor of a kind of photochemical catalysis postposition according to claim 1, is characterized in that, the volumetric loading of the internal circulating anaerobic fluidization membrane bio-reactor of described photochemical catalysis postposition is 6-20g (COD)/Ld.
10. utilize a method of work for reactor for treatment sewage as claimed in claim 1, it is characterized in that, it is as follows that the method comprising the steps of:
(1) in reaction tube, add anaerobic activated sludge by filling out mud material mouth, add anaerobic activated sludge volume account for 1/6-1/5 of whole reaction tube volume; Sheathed hollow out support outside membrane module, opens the ultraviolet source on hollow out support;
(2) open water-in, in reaction tube, inject sewage; Open biogas aeration plate, in reaction tube, inject biogas;
(3) sewage rises to triphase separator along air lift cylinder: biogas is discharged along triphase separator, escape pipe; Throw out in sewage is along the space sedimentation of air lift cylinder, and reacts with described anaerobic activated sludge generation anaerobe;
(4) the clear liquid part in sewage is detained on the top of reaction tube, and sewage clear liquid filters by membrane module and under titanium dioxide, light-catalysed effect, finally discharges along rising pipe;
(5) continue to be back to the bottom of air lift cylinder along the dirty sewage in the space of air lift cylinder, repeating step (3).
CN201210583164.2A 2012-12-28 2012-12-28 Photocatalytic postposed internal-circulation anaerobic fluidized membrane bioreactor and working method thereof Expired - Fee Related CN103073150B (en)

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