CN104403937A - Rotating internal-loop airlift membrane bioreactor and process system thereof - Google Patents
Rotating internal-loop airlift membrane bioreactor and process system thereof Download PDFInfo
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- 239000012528 membrane Substances 0.000 title claims abstract description 154
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000008569 process Effects 0.000 title claims abstract description 23
- 239000000706 filtrate Substances 0.000 claims abstract description 60
- 238000000926 separation method Methods 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims description 49
- 239000012530 fluid Substances 0.000 claims description 36
- 238000007789 sealing Methods 0.000 claims description 21
- 230000033228 biological regulation Effects 0.000 claims description 9
- 238000013022 venting Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000004907 flux Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000000712 assembly Effects 0.000 abstract 4
- 238000000429 assembly Methods 0.000 abstract 4
- 239000007788 liquid Substances 0.000 description 22
- 239000000047 product Substances 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 13
- FRXSZNDVFUDTIR-UHFFFAOYSA-N 6-methoxy-1,2,3,4-tetrahydroquinoline Chemical group N1CCCC2=CC(OC)=CC=C21 FRXSZNDVFUDTIR-UHFFFAOYSA-N 0.000 description 9
- 238000000855 fermentation Methods 0.000 description 9
- 230000004151 fermentation Effects 0.000 description 9
- 239000000758 substrate Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 102000004190 Enzymes Human genes 0.000 description 6
- 108090000790 Enzymes Proteins 0.000 description 6
- 150000004676 glycans Chemical class 0.000 description 6
- 229920001282 polysaccharide Polymers 0.000 description 6
- 239000005017 polysaccharide Substances 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000001471 micro-filtration Methods 0.000 description 4
- 229920001542 oligosaccharide Polymers 0.000 description 4
- 150000002482 oligosaccharides Chemical class 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000249 desinfective effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 238000000108 ultra-filtration Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 235000010443 alginic acid Nutrition 0.000 description 2
- 229920000615 alginic acid Polymers 0.000 description 2
- 235000010418 carrageenan Nutrition 0.000 description 2
- 229920001525 carrageenan Polymers 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 240000000588 Hericium erinaceus Species 0.000 description 1
- 235000007328 Hericium erinaceus Nutrition 0.000 description 1
- 229920001491 Lentinan Polymers 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 241001052560 Thallis Species 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 125000000600 disaccharide group Chemical group 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000012262 fermentative production Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229940115286 lentinan Drugs 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 108010001062 polysaccharide-K Proteins 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M33/00—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus
- C12M33/14—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus with filters, sieves or membranes
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- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/14—Pressurized fluid
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- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
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- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/30—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration
- C12M41/34—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration of gas
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Abstract
The invention discloses a rotating internal-loop airlift membrane bioreactor. The membrane bioreactor comprises a reaction kettle body, a primary membrane separation device and a filtrate collection device, wherein primary membrane assemblies are evenly distributed on the periphery of the outer circle wall of a guide barrel, two ends of each primary membrane assembly are detachably fixed on two rotating frames arranged in an upper-and-lower manner respectively, and the rotating frames are fixed on sealed bearings mounted on the guide barrel in a sleeve manner; the filtrate collection device comprises a filtrate collector and a filtrate collection pipe; secondary membrane assemblies can be mounted optionally according to processes. The rotating internal-loop airlift membrane bioreactor integrates airlift reaction and membrane separation, most of energy required by the whole process is provided by compressed air, and the number, the angle, the use and the membrane flux of the membrane assemblies can be adjusted manually, so that different operations of the airlift reactor are adapted, and the membrane assemblies and the reactor are well coupled; the airlift membrane bioreactor has the advantages of low energy consumption, simple structure, flexibility in operation, mild reaction condition and the like.
Description
Technical field
The present invention relates to field of membrane bioreactor technology, particularly relate to a kind of rotation internal circulation gas-lift type membrane bioreactor and process system thereof.
Background technology
In biochemical reaction process, along with reaction is carried out, tunning constantly accumulates, product inhibition is given prominence to gradually, as at popular chemical as in alcohol production, to general yeast saccharomyces cerevisiae, when single-stage tank Batch fermentation alcohol concn in latter stage reaches 18%-20%, microbial activity is seriously suppressed even there is thalline mortality.Prepare in the process of activated oligosaccharide at enzymic degradation biological polyoses, extracellular enzyme is often by substrate for induction and Product inhibiton dual function, and as in carrageenin or algin production, the disaccharide unit of the digested acquisition of substrate too much accumulates can affect thalline continuation product enzyme.
On the other hand, product consumption effect also often exists, and as in ganoderan submerged fermentation process, the ganoderan of fermentation gained can be fermented thalline and utilize, and removal system can cause yield to reduce greatly not in time.
Therefore, in order to improve reaction yield and production intensity, utilize the characteristic of membrane bioreactor coupling reaction and lock out operation, the product come in " limit coronite is removed " system is one of good solution.Fermentable and product separation combine by this kind of bio-reactor, be usually used in solving the problems such as tunning suppresses, substrate selection supply, by continuously fermenting for a long time, reach the high-density growth of microorganism and increase the object of tunning productive rate, cell density or meta-bolites productive rate can reach ten times even more than 100 times of batch fermentation usually.In this process, after fermented liquid entered membrane filtration, tunning is shifted out fermentor tank effectively, alleviate the suppression and consumption effect that even eliminate product, and remaining raffinate and the cell be trapped continue to return in fermentor tank, thus the high cell concentration maintained in fermentor tank, achieve liquid level equilibrium in tank very easily simultaneously.Such as adopt membrane bioreactor system to carry out continuously fermenting of ganoderan, solubility ganoderan can be penetrated through the filter membrane of membrane bioreactor continuously.By the fresh feed liquid of continuous supplementation, improve sugared source, decrease the utilization of mycelium to polysaccharide, improve the output of mycelial yield and ganoderan, mycelial growth then increases with the increase of thinning ratio, total the comparable batch fermentation of mycelium dry weight increase by more than 20%.
But in membrane reactor operational process, feed liquid is separated on film surface after pump delivery, the pollution of film is very serious, and identical with production concentration in retort through membrane sepn production concentration out, and subsequent disposal is cumbersome; Meanwhile, due to the use of pump, this process energy consumption is higher, and the violent easily deteriorative reaction condition of the turbulence of fluid, is unfavorable for thalli growth.
In order to overcome these problems, ZL01108189.9, ZL200520075139.9, ZL200910026442.2 successively propose the power using pressurized gas as membrane bioreactor, replace traditional pump.But reactor is connected with membrane module by common pipe by the former, cause structure of reactor comparatively to disperse, fluid circulation line is longer, thus gas-liquid mass transfer effect is affected, the more difficult demand meeting extensive reaction.Middle person proposes outside circulation gas lift type membrane reactor on the former basis, in the reactor, membrane module is well coupled with reactor, but refluxing opening is positioned at the expanding reach place on reaction kettle body top in the reactor, refluxing opening is positioned on liquid level or to be positioned at the subsurface degree of depth very little, and refluxing opening place does not have thrust-augmenting nozzle simultaneously, the effusion immediately after loop ends of a large amount of pressurized gas is drained, only serve the effect of circulation power, do not obtain Appropriate application, cause power loss.The latter proposes external loop air lift type membrane bioreactor on the above two basis, and this reactor introduces membrane module on the basis not changing airlift reactor basic structure, possesses the function of airlift reactor, membrane bioreactor and air lift simultaneously.But the existence of air stripping unit in this reactor, limits the range of application of this reactor, namely inhibition product is had to the requirement of boiling characteristics.Meanwhile, because the membrane module of such reactor is positioned at circulation tube, add the circulation resistance of airlift reactor, easily cause reactor inner cell and nutrition distribution pattern uneven.These inventions above-mentioned are to a certain degree solving the problem of membrane reactor reaction member-separating unit coupling, but be unfavorable for carry out coupling to introduce other complex constructions amplifying, and there is problem and the defects such as energy utilization rate is low, the scope of application is narrower, complex structure, film vulnerable to pollution.
As can be seen here, develop the integral type film biological reactor that a kind of novel range of application is wide, particularly develop a kind of integral type film biological reactor being applicable to fermentation arts, the advantage of membrane sepn and airlift reactor is brought into play simultaneously, and there is high-energy utilising efficiency, be of great practical significance.
Summary of the invention
The object of the invention is: in order to solve above-mentioned Product inhibiton existing for fermentation arts and product consumes problems in role, according to the feature making up mutually shortcoming that advantage and they of membrane separation reactor and airlift reactor have, and provide a kind of and rotate internal circulation gas-lift type membrane bioreactor and process system thereof.
For solving the problems of the technologies described above, technical scheme of the present invention is: rotate internal circulation gas-lift type membrane bioreactor, comprise reactor main body, one-level membrane separation unit and Filtrate collection device; Reactor main body comprises airway, guide shell, kettle and gas distributor, the top of kettle is provided with tensimeter and is provided with fluid inlet, venting port, ventage, venting port is connected with gas exhausting valve, ventage is connected with breather valve, the cylindrical wall of kettle is provided with form, circulation fluid entrance, the bottom of kettle is provided with leakage fluid dram, the inside of kettle is provided with guide shell, the inside of guide shell is provided with airway, the top of airway is connected with ventage, bottom is connected with gas distributor, and gas distributor is that how annular ladder is; One-level membrane separation unit comprises swivel mount, sealing bearing and one-level membrane module, one-level membrane module is the bent-tube boiler hollow structure of horseshoe shaped section, one-level membrane module described in some is distributed on the cylindrical wall surrounding of guide shell, the two ends of one-level membrane module are detachable to be respectively fixed on two swivel mounts of arranging up and down, swivel mount is fixed on sealing bearing, and sealing bearing is sleeved on guide shell; Filtrate collection device comprises filtrate collection and percolate collection tubes, filtrate collection comprises sealing bearing, upper spiral cover and tank body, upper spiral cover is connected with tank body, sealing bearing is sleeved on spiral cover, filtrate collection is arranged on the bottom of kettle by upper spiral cover and is positioned at immediately below gas distributor, filtrate collection is connected by percolate collection tubes with the swivel mount being positioned at bottom, the bottom of tank body is provided with filtrate port, filtrate port is connected with vacuum control valve, the bottom of tank body cylindrical wall is provided with circulation fluid outlet, and circulation fluid outlet is connected with circulating regulation valve.
Further, in filtrate collection, second membrane module is installed.
Further, the cylindrical wall of kettle offers form.
Further, the spacing of two swivel mounts is the 0.1-1 of guide shell length.
Further, the aspect ratio of reactor main body is 3-10.
Further, the angle of inclination of one-level membrane module is 20-90 degree.
Further, the side of kettle is provided with thermometer, pH meter, dissolved oxygen electrode, level probe be provided with thief hole.
Further, filtrate collection and the swivel mount being positioned at bottom are that 120 degree of spacing are connected by 3 percolate collection tubes.
Rotate the process system of internal circulation gas-lift type membrane bioreactor, the breather valve rotating internal circulation gas-lift type membrane bioreactor is connected with gas meter, steel cylinder, air compressor successively; The vacuum control valve rotating internal circulation gas-lift type membrane bioreactor is connected with filtrate collection tank, vacuum pump successively; The circulating regulation valve rotating internal circulation gas-lift type membrane bioreactor is connected with recycle pump, the circulation fluid entrance that rotates internal circulation gas-lift type membrane bioreactor successively.
Further, in the filtrate collection rotating internal circulation gas-lift type membrane bioreactor, second membrane module is installed.
Further, gas meter is connected with recoil control valve, vacuum control valve successively.
Beneficial effect of the present invention:
1. one-level membrane separation unit adopts rotary one-level membrane module, utilizes airlift reactor inner fluid kinetic energy to drive one-level membrane module to rotate, and without the need to extra energy input, reaches the effect adding film and liquid reactor contact area, improve the penetrating amount of film simultaneously; Utilize fluid flushing film surface simultaneously, reduce fouling membrane; Quantity and the setting angle of one-level membrane module are adjustable, are suitable for the reaction of different gas holdup and different separating property product, expand the range of application of this reactor;
2. second membrane module can be set according to needs in filtrate collection, carry out secondary membrane sepn, first-level filtering liquid pump in filtrate collection can enter in kettle to circulate by recycle pump by secondary membrane sepn process, recycle pump can be selected to open according to production technique, expand the reactor scope of application, improve product purity;
3. can selecting during membrane sepn to adopt positive pressure operation or negative pressure-pumping, when carrying out positive press filtration, the ventage place valve at reactor top can be turned down, thus increase still internal pressure, realize membrane sepn; When still internal pressure be normal pressure or negative pressure time then open vacuum pump and carry out negative-pressure operation; Still internal pressure can also be regulated whether to regulate the work of membrane separation unit, as when being normal pressure in still, membrane separation unit is in closing condition, air flow and membrane flux can be regulated the while of such to change the amount removed of product, thus can adjust accordingly according to speed of reaction, be applicable to the reaction process different to oxygen demand, operation has more handiness;
To sum up, rotate internal circulation gas-lift type membrane bioreactor to break traditions membrane module compartmentation concept in membrane reactor, gas collection rises reaction with membrane sepn in one, by dispersed for one-level membrane module be placed in internal circulation gas-lift type reactor liquid zone falls, realize membrane reactor and the efficient coupling of airlift reactor in biological fermentation field, energy needed for whole process is mostly provided by pressurized gas, membrane module quantity, angle, whether enable, membrane flux can manually regulate, to adapt to the different operating of airlift reactor, well achieve the coupling of the two, there is energy consumption low, structure is simple, flexible operation, the advantages such as reaction conditions is gentle, for fermentative production polysaccharide, the products such as oligosaccharides, the process that substrate molecule amount difference is large provides new conversion unit and technique.
Accompanying drawing explanation
Fig. 1 rotates internal circulation gas-lift type membrane bioreactor structural representation;
Fig. 2 is one-level membrane separation unit vertical view;
Fig. 3 is one-level membrane module schematic cross-section;
Fig. 4 is one-level membrane module structure schematic diagram;
Fig. 5 is filtrate collection structural representation;
Fig. 6 rotates internal circulation gas-lift type membrane biological reactor process system diagram.
Wherein: 1. fluid inlet, 2. airway, 3. guide shell, 4. kettle, 5. gas distributor, 6. leakage fluid dram, 7. second membrane module, 8. filtrate port, 9. vacuum control valve, 10. circulating regulation valve, 11. filtrate collection, 12. percolate collection tubes, 13. swivel mounts, 14. sealing bearings, 15. one-level membrane modules, 16. forms, 17. circulation fluid entrances, 18. venting ports, 19. gas exhausting valves, 20. breather valves, 21. ventages, spiral cover on 22., 23. recycle pumps, 24. tank bodies, 25. filtrate collection tanks, 26. vacuum pumps, 27. recoil control valves, 28. steel cylinders, 29. air compressors, 30. gas meters, 31. circulation fluid outlets.
Embodiment
Embodiment one
As Figure 1-Figure 5, rotate internal circulation gas-lift type membrane bioreactor, comprise reactor main body, one-level membrane separation unit and Filtrate collection device, reactor main body comprises airway 2, guide shell 3, kettle 4 and gas distributor 5, the top of kettle 4 is provided with tensimeter and is provided with fluid inlet 1, venting port 18, ventage 21, venting port 18 is connected with gas exhausting valve 19, by regulating free air delivery thus regulating the pressure in kettle 4, ventage 21 is connected with breather valve 20, the cylindrical wall of kettle 4 is provided with form 16, circulation fluid entrance 17, the side of kettle 4 is provided with thermometer, pH meter, dissolved oxygen electrode, level probe is also provided with thief hole, the bottom of kettle 4 is provided with leakage fluid dram 6, the inside of kettle 4 is provided with guide shell 3, the inside of guide shell 3 is provided with airway 2, the top of airway 2 is connected with ventage 21, bottom is connected with gas distributor 5, gas distributor 5 is that how annular ladder is, the aspect ratio of reactor main body is 3-10, one-level membrane separation unit comprises swivel mount 13, sealing bearing 14 and one-level membrane module 15, one-level membrane module 15 is the bent-tube boiler hollow structure of horseshoe shaped section, overall weight can be alleviated, more easily rotate, increase the specific surface area of one-level membrane module 15 and liquid comes into contact, one-level membrane module 15 can be replaced by ultrafiltration or micro-filtration mineral membrane according to need of production, disinfecting action can be tolerated, interception thalline and unreacted polysaccharide substrate completely, the quantity of one-level membrane module 15 can be selected according to production technique, the angle of inclination of one-level membrane module 15 can manual shift be 20-90 degree, admittedly one-level membrane module 15 carries out positive press filtration when carrying out liquid/separation, transmembrane pressure is 0.01 ~ 1MPa, or employing negative pressure-pumping, transmembrane pressure is 0.01 ~ 1MPa, the 4 one-level membrane modules 15 falling liquid zone at gas lift are 45 degree of cylindrical wall surroundings being distributed on guide shell 3 axially, the two ends of one-level membrane module 15 are detachable to be respectively fixed on two swivel mounts 13 of arranging up and down, the spacing of two swivel mounts 13 is the 0.1-1 of guide shell 3 length, swivel mount 13 is fixed on sealing bearing 14, sealing bearing 14 is sleeved on guide shell 3, Filtrate collection device comprises filtrate collection 11 and percolate collection tubes 12, filtrate collection 11 comprises sealing bearing 14, upper spiral cover 22 and tank body 24, upper spiral cover 22 is connected with tank body 24, sealing bearing 14 is sleeved on spiral cover 22, filtrate collection 11 is arranged on the bottom of kettle 4 by upper spiral cover 22 and is positioned at immediately below gas distributor 5, filtrate collection 11 is connected in 120 degree of spacing by 3 percolate collection tubes 12 with the swivel mount 13 being positioned at bottom, produce moment of rotation, rotation is carried out smoothly, also be beneficial to one-level membrane module 15 to be washed simultaneously, preventing pollution, can select in filtrate collection 11 second membrane module 7 is installed, ultrafiltration or micro-filtration mineral membrane can be replaced by according to need of production, disinfecting action can be tolerated, interception thalline and unreacted polysaccharide substrate completely, the bottom of tank body 24 is provided with filtrate port 8, filtrate port 8 is connected with vacuum control valve 9, the bottom of tank body 24 cylindrical wall is provided with circulation fluid outlet 31, circulation fluid outlet 31 is connected with circulating regulation valve 10.
As shown in figs 1 to 6, rotate the process system of internal circulation gas-lift type membrane bioreactor, the breather valve 20 rotating internal circulation gas-lift type membrane bioreactor is connected with gas meter 30, steel cylinder 28, air compressor 29 successively, the vacuum control valve 9 rotating internal circulation gas-lift type membrane bioreactor is connected with filtrate collection tank 25, vacuum pump 26 successively, the circulating regulation valve 10 rotating internal circulation gas-lift type membrane bioreactor is connected with recycle pump 23, the circulation fluid entrance 17 that rotates internal circulation gas-lift type membrane bioreactor successively, gas meter 30 is connected with recoil control valve 27, vacuum control valve 9 successively, can after production terminates back flushing one-level membrane module 15 and second membrane module 7, being applied to continuously ferments produces enzyme liberating carrageenin substrate acquisition oligosaccharide compositions, after in-situ sterilization, in kettle 4, feed liquid is added by fluid inlet 1, pressurized gas is blasted wherein by ventage 21, gas enters guide shell 3 through gas distributor 5, due to entering of the pressurized gas with certain initial velocity, fall between liquid zone and guide shell 3 at gas lift and produce density difference, under this effect of two kinds, guide shell 3 inner fluid moves upward, gas lift falls liquid in liquid zone and moves downward, when arriving one-level membrane module 15, the unlatching of one-level membrane separation unit can be controlled by vacuum control valve 9, detect biomass, enzyme activity determination etc. by sampling and determine that thalline produces enzyme situation, reach and produce enzyme when stablizing, about 12h, open one-level membrane separation unit, carry out operation of continuously fermenting thereafter, one-level membrane separation unit is opened all the time, concentrated solution enters in filtrate collection 11 through percolate collection tubes 12, utilizes the tubular fibre second membrane module 7 in filtrate collection 11, carries out secondary membrane separation, and product purity and concentration are improved simultaneously, one-level filtrate need pump into kettle 4 through filtrate cycle pipeline, and then concentrated solution is collected in filtrate collection tank 25, this embodiment also can be used for the product such as agaropectin oligose, algin oligosaccharide, fermentation sepn process that substrate molecule amount difference is large.
Embodiment two
As Figure 1-Figure 5, rotate internal circulation gas-lift type membrane bioreactor, comprise reactor main body, one-level membrane separation unit and Filtrate collection device, reactor main body comprises airway 2, guide shell 3, kettle 4 and gas distributor 5, the top of kettle 4 is provided with tensimeter and is provided with fluid inlet 1, venting port 18, ventage 21, venting port 18 is connected with gas exhausting valve 19, by regulating free air delivery thus regulating the pressure in kettle 4, ventage 21 is connected with breather valve 20, the cylindrical wall of kettle 4 is provided with form 16, circulation fluid entrance 17, the side of kettle 4 is provided with thermometer, pH meter, dissolved oxygen electrode, level probe is also provided with thief hole, the bottom of kettle 4 is provided with leakage fluid dram 6, the inside of kettle 4 is provided with guide shell 3, the inside of guide shell 3 is provided with airway 2, the top of airway 2 is connected with ventage 21, bottom is connected with gas distributor 5, gas distributor 5 is that how annular ladder is, the aspect ratio of reactor main body is 3-10, one-level membrane separation unit comprises swivel mount 13, sealing bearing 14 and one-level membrane module 15, one-level membrane module 15 is the bent-tube boiler hollow structure of horseshoe shaped section, overall weight can be alleviated, more easily rotate, increase the specific surface area of one-level membrane module 15 and liquid comes into contact, one-level membrane module 15 can be replaced by ultrafiltration or micro-filtration mineral membrane according to need of production, disinfecting action can be tolerated, interception thalline and unreacted polysaccharide substrate completely, the quantity of one-level membrane module 15 can be selected according to production technique, the angle of inclination of one-level membrane module 15 can manual shift be 20-90 degree, admittedly one-level membrane module 15 carries out positive press filtration when carrying out liquid/separation, transmembrane pressure is 0.01 ~ 1MPa, or employing negative pressure-pumping, transmembrane pressure is 0.01 ~ 1MPa, the 4 one-level membrane modules 15 falling liquid zone at gas lift are 45 degree of cylindrical wall surroundings being distributed on guide shell 3 axially, the two ends of one-level membrane module 15 are detachable to be respectively fixed on two swivel mounts 13 of arranging up and down, the spacing of two swivel mounts 13 is the 0.1-1 of guide shell 3 length, swivel mount 13 is fixed on sealing bearing 14, sealing bearing 14 is sleeved on guide shell 3, Filtrate collection device comprises filtrate collection 11 and percolate collection tubes 12, filtrate collection 11 comprises sealing bearing 14, upper spiral cover 22 and tank body 24, upper spiral cover 22 is connected with tank body 24, sealing bearing 14 is sleeved on spiral cover 22, filtrate collection 11 is arranged on the bottom of kettle 4 by upper spiral cover 22 and is positioned at immediately below gas distributor 5, filtrate collection 11 is connected in 120 degree of spacing by 3 percolate collection tubes 12 with the swivel mount 13 being positioned at bottom, produce moment of rotation, rotation is carried out smoothly, also be beneficial to one-level membrane module 15 to be washed simultaneously, preventing pollution, the bottom of tank body 24 is provided with filtrate port 8, filtrate port 8 is connected with vacuum control valve 9, the bottom of tank body 24 cylindrical wall is provided with circulation fluid outlet 31, circulation fluid outlet 31 is connected with circulating regulation valve 10.
As shown in figs 1 to 6, rotate the process system of internal circulation gas-lift type membrane bioreactor, the breather valve 20 rotating internal circulation gas-lift type membrane bioreactor is connected with gas meter 30, steel cylinder 28, air compressor 29 successively; The vacuum control valve 9 rotating internal circulation gas-lift type membrane bioreactor is connected with filtrate collection tank 25, vacuum pump 26 successively; The circulating regulation valve 10 rotating internal circulation gas-lift type membrane bioreactor is connected with recycle pump 23, the circulation fluid entrance 17 that rotates internal circulation gas-lift type membrane bioreactor successively; Gas meter 30 is connected with recoil control valve 27, vacuum control valve 9 successively, can after production terminates back flushing one-level membrane module 15; Be applied to the process that tank fermentation method produces ganoderan, in kettle 4, add feed liquid by fluid inlet 1, blast pressurized gas wherein by ventage 21, gas enters guide shell 3 through gas distributor 5, guide shell 3 inner fluid moves upward, gas lift falls liquid in liquid zone and moves downward, and when arriving one-level membrane module 15, opens vacuum pump 26, regulate transmembrane pressure, carry out negative pressure-pumping, make membrane flux consistent with feed rate, balance to keep tank level; Concentrated solution enters in filtrate collection 11 through percolate collection tubes 12, and then concentrated solution is collected in filtrate collection tank 25, and because thalline cannot pass through microfiltration membrane, thalline is trapped in kettle 4, makes in tank containing higher cell concn; This embodiment also can be used for the one-level membrane filtrations such as lentinan, krestin, hericium erinaceum polysaccharide.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (10)
1. rotate internal circulation gas-lift type membrane bioreactor, it is characterized in that: comprise reactor main body, one-level membrane separation unit and Filtrate collection device, reactor main body comprises airway (2), guide shell (3), kettle (4) and gas distributor (5), the top of kettle (4) is provided with tensimeter and is provided with fluid inlet (1), venting port (18), ventage (21), venting port (18) is connected with gas exhausting valve (19), ventage (21) is connected with breather valve (20), the cylindrical wall of kettle (4) is provided with form (16), circulation fluid entrance (17), the bottom of kettle (4) is provided with leakage fluid dram (6), the inside of kettle (4) is provided with guide shell (3), the inside of guide shell (3) is provided with airway (2), the top of airway (2) is connected with ventage (21), bottom is connected with gas distributor (5), gas distributor (5) for ladder how annular,
One-level membrane separation unit comprises swivel mount (13), sealing bearing (14) and one-level membrane module (15), the bent-tube boiler hollow structure that one-level membrane module (15) is horseshoe shaped section, one-level membrane module (15) described in some is distributed on the cylindrical wall surrounding of guide shell (3), the two ends of one-level membrane module (15) are detachable to be respectively fixed on two swivel mounts (13) arranging up and down, swivel mount (13) is fixed on sealing bearing (14), and sealing bearing (14) is sleeved on guide shell (3);
Filtrate collection device comprises filtrate collection (11) and percolate collection tubes (12), filtrate collection (11) comprises sealing bearing (14), upper spiral cover (22) and tank body (24), upper spiral cover (22) is connected with tank body (24), sealing bearing (14) is sleeved on spiral cover (22), filtrate collection (11) is arranged on the bottom of kettle (4) by upper spiral cover (22) and is positioned at immediately below gas distributor (5), filtrate collection (11) is connected by percolate collection tubes (12) with the swivel mount (13) being positioned at bottom, the bottom of tank body (24) is provided with filtrate port (8), filtrate port (8) is connected with vacuum control valve (9), the bottom of tank body (24) cylindrical wall is provided with circulation fluid outlet (31), circulation fluid outlet (31) is connected with circulating regulation valve (10).
2. rotation internal circulation gas-lift type membrane bioreactor according to claim 1, is characterized in that: be provided with second membrane module (7) in described filtrate collection (11).
3. rotation internal circulation gas-lift type membrane bioreactor according to claim 1, is characterized in that: the spacing of two described swivel mounts (13) is the 0.1-1 of guide shell (3) length.
4. rotation internal circulation gas-lift type membrane bioreactor according to claim 1, is characterized in that: the aspect ratio of described reactor main body is 3-10.
5. rotation internal circulation gas-lift type membrane bioreactor according to claim 1, is characterized in that: the angle of inclination of described one-level membrane module (15) is 20-90 degree.
6. rotation internal circulation gas-lift type membrane bioreactor according to claim 1, is characterized in that: the side of described kettle (4) is provided with thermometer, pH meter, dissolved oxygen electrode, level probe be provided with thief hole.
7. rotation internal circulation gas-lift type membrane bioreactor according to claim 1, is characterized in that: described filtrate collection (11) is connected in 120 degree of spacing by 3 percolate collection tubes (12) with the swivel mount (13) being positioned at bottom.
8. application rights requires a process system for the rotation internal circulation gas-lift type membrane bioreactor described in 1, it is characterized in that: the breather valve (20) of described rotation internal circulation gas-lift type membrane bioreactor is connected with gas meter (30), steel cylinder (28), air compressor (29) successively; The vacuum control valve (9) rotating internal circulation gas-lift type membrane bioreactor is connected with filtrate collection tank (25), vacuum pump (26) successively; The circulating regulation valve (10) rotating internal circulation gas-lift type membrane bioreactor is connected with recycle pump (23), the circulation fluid entrance (17) that rotates internal circulation gas-lift type membrane bioreactor successively.
9. the process system of rotation internal circulation gas-lift type membrane bioreactor according to claim 8, is characterized in that: be provided with second membrane module (7) in the filtrate collection (11) of described rotation internal circulation gas-lift type membrane bioreactor.
10. the process system of rotation internal circulation gas-lift type membrane bioreactor according to claim 8, is characterized in that: described gas meter (30) is connected with recoil control valve (27), vacuum control valve (9) successively.
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