CN107384753B - High-efficiency anaerobic fermentation dynamic membrane bioreactor - Google Patents
High-efficiency anaerobic fermentation dynamic membrane bioreactor Download PDFInfo
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- CN107384753B CN107384753B CN201710698738.3A CN201710698738A CN107384753B CN 107384753 B CN107384753 B CN 107384753B CN 201710698738 A CN201710698738 A CN 201710698738A CN 107384753 B CN107384753 B CN 107384753B
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- 239000012528 membrane Substances 0.000 title claims abstract description 41
- 238000000855 fermentation Methods 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000000926 separation method Methods 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 238000004062 sedimentation Methods 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 238000004321 preservation Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 6
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000010802 sludge Substances 0.000 abstract description 4
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 230000004151 fermentation Effects 0.000 description 8
- 239000002910 solid waste Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009270 solid waste treatment Methods 0.000 description 2
- 230000021736 acetylation Effects 0.000 description 1
- 238000006640 acetylation reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- 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
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- 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
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/36—Means for collection or storage of gas; Gas holders
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- 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
- C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
- C12M27/02—Stirrer or mobile mixing elements
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- 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
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/12—Means for regulation, monitoring, measurement or control, e.g. flow regulation of temperature
- C12M41/18—Heat exchange systems, e.g. heat jackets or outer envelopes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
Abstract
The invention discloses a high-efficiency anaerobic fermentation dynamic membrane bioreactor, which comprises a biological reaction zone, a sedimentation zone, a solid-liquid separation zone, a gas collection zone and a water bath heat preservation layer; the biological reaction zone comprises a feed inlet, a sludge discharge port and a stirrer; the solid-liquid separation area comprises a dynamic membrane, a dynamic membrane supporting layer, a double-layer gasket, a fixed ring, a fixed screw and a water outlet; the gas collecting area is positioned at the top of the reactor and is connected with the gas collecting tank through a gas outlet through a water sealed bottle; the water bath heat preservation layer comprises a water bath inlet and a water bath outlet, and is connected with the constant-temperature water bath through a circulating pump pipeline. The advantages of the invention are mainly as follows: independent regulation and control of SRT and HRT of the anaerobic fermentation system can be realized; the interception of zymocyte in the reactor can be effectively increased, and the stable operation of the high-efficiency anaerobic fermentation system is easier to realize; the dynamic membrane material has low cost and is easy to detach and replace.
Description
Technical Field
The invention belongs to the technical field of solid waste treatment, and particularly relates to a high-efficiency anaerobic fermentation dynamic membrane bioreactor.
Background
The dynamic membrane bioreactor is a novel treatment process combining dynamic membrane filtration technology and biological treatment process. Compared with the traditional membrane bioreactor, the dynamic membrane bioreactor has the advantages of good effluent quality, large flux, remarkably improved anti-pollution capability, simple membrane pollution removal, low energy consumption and the like, and can greatly reduce the manufacturing cost of the filter assembly while maintaining the process advantages of the membrane bioreactor. The process unit is considered as a sewage and wastewater treatment technology with great potential, but the application of the process unit in the field of solid waste treatment such as anaerobic fermentation and the like is rarely reported.
The realization of recycling and energy-recovering of the solid wastes is an effective way for relieving energy shortage and solid waste pollution. The anaerobic fermentation system can convert solid waste (such as excess sludge, straw or excrement) into energy gas. The anaerobic fermentation system with simple and high efficiency is an important premise for large-scale popularization and application. By adding different pretreatment measures, the gas production efficiency of the fermentation system can be improved to a certain extent, but the investment cost is increased. At present, fermentation liquor and zymophyte in an anaerobic fermentation reactor are in a complete mixing state, and corresponding Sludge Retention Time (SRT) and Hydraulic Retention Time (HRT) are difficult to separate, so that the zymophyte in a fermentation system is difficult to realize a large amount of enrichment, and further improvement of the processing load of the fermentation system is limited to a certain extent. Therefore, it is particularly necessary to develop an efficient anaerobic fermentation reactor which can realize independent control of SRT and HRT, and has low cost and simple control.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a high-efficiency anaerobic fermentation dynamic membrane bioreactor which can realize the independent regulation and control of SRT and HRT of an anaerobic fermentation system; the interception of zymocyte in the reactor can be effectively increased, and the stable operation of the high-efficiency anaerobic fermentation system is easier to realize; the required dynamic membrane material has low cost and is easy to detach and replace.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a high-efficiency anaerobic fermentation dynamic membrane bioreactor is provided with a biological reaction zone, a sedimentation zone, a solid-liquid separation zone, a gas collection zone and a water bath heat preservation layer; wherein, the top of the reactor is provided with a feed inlet, the bottom of the reactor is provided with a mud discharge port, and the reactor is internally provided with a stirrer; the water bath heat preservation layer is an outer wall interlayer of the reactor and is used for realizing heat preservation of the reactor, the solid-liquid separation area is positioned in the middle of the reactor, the sedimentation area is positioned below the solid-liquid separation area, the biological reaction area is positioned below the sedimentation area, and the gas collection area is positioned above the solid-liquid separation area; the solid-liquid separation area comprises a dynamic membrane, the dynamic membrane is placed in the middle of the double-layer gasket and is fixed on the dynamic membrane supporting layer through a fixed ring and a fixed screw, and a water outlet is formed in the side wall of the reactor at a position corresponding to the solid-liquid separation area; the gas collecting area is connected with the gas collecting tank through a gas outlet through a water sealed bottle; the water bath heat preservation layer comprises a water bath inlet and a water bath outlet, and is connected with the constant-temperature water bath through a circulating pump pipeline.
Further, the stirring shaft of the stirrer passes through the gas collecting area, the solid-liquid separation area and the sedimentation area, and the stirring blades are positioned in the biological reaction area.
Further, the sedimentation zone is in the shape of an inverted cone.
Further, the horizontal inclination angle of the inverted cone of the sedimentation zone is 45-60 degrees.
Further, the pore size of the dynamic membrane is 200-500 meshes, and the dynamic membrane is made of nylon net or stainless steel net.
Further, the solid-liquid separation zone is located at 1/2-2/3 of the height of the reactor.
Further, the gas collection zone occupies 1/3 of the reactor volume.
Compared with the prior art, the invention has the beneficial effects that:
(1) Independent regulation and control of SRT and HRT of the anaerobic fermentation system can be realized;
(2) The interception of zymocyte can be effectively increased, and the stable operation of the high-efficiency anaerobic fermentation system is easier to realize;
(3) The dynamic membrane material has low cost and is easy to detach and replace.
Drawings
FIG. 1 is a schematic view (longitudinal section) of the structure of the present invention;
FIG. 2 is a schematic view (top view) of the structure of the present invention;
FIG. 3 is a schematic view (longitudinal section) of the solid-liquid separation zone of the present invention;
FIG. 4 is a schematic view (top view) of the solid-liquid separation zone of the present invention;
fig. 5 is an enlarged view of fig. 4 a.
The device comprises a biological reaction zone 1, a sedimentation zone 2, a solid-liquid separation zone 3, a gas collection zone 4, a water bath heat insulation layer 5, a feed inlet 11, a sludge discharge outlet 12, a stirrer 13, a dynamic membrane 31, a dynamic membrane supporting layer 32, a double-layer gasket 33, a fixed ring 34, a fixed screw 35, a water discharge outlet 36, an air discharge outlet 41, a water bath inlet 51 and a water bath outlet 52.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in figure 1, a high-efficiency anaerobic fermentation dynamic membrane bioreactor is provided with a biological reaction zone 1, a sedimentation zone 2, a solid-liquid separation zone 3, a gas collection zone 4 and a water bath heat preservation layer 5; wherein, the top of the reactor is provided with a feed inlet 11, the bottom is provided with a mud discharge outlet 12, and the reactor is internally provided with a stirrer 13; the water bath heat preservation layer 5 is an outer wall interlayer of the reactor and is used for realizing heat preservation of the reactor, the solid-liquid separation zone 3 is positioned in the middle of the reactor, the sedimentation zone 2 is positioned below the solid-liquid separation zone 3, the biological reaction zone 1 is positioned below the sedimentation zone 2, and the gas collection zone 4 is positioned above the solid-liquid separation zone 3; the solid-liquid separation zone 3 comprises a dynamic membrane 31, the dynamic membrane 31 is placed in the middle of a double-layer gasket 33 and is fixed on a dynamic membrane supporting layer 32 through a fixed ring 34 and a fixed screw 35, and a water outlet 36 is formed in the side wall of the reactor at a position corresponding to the solid-liquid separation zone 3; the gas collecting area 4 is connected with a gas collecting tank through a gas outlet 41 by a water sealed bottle through a pipeline; the water bath heat preservation layer 5 comprises a water bath inlet 51 and a water bath outlet 52, and is connected with the constant-temperature water bath through a circulating pump pipeline.
Further, the stirring shaft of the stirrer 13 passes through the gas collecting zone 4, the solid-liquid separation zone 3 and the sedimentation zone 2, and stirring blades are positioned in the biological reaction zone 1.
Further, the sedimentation zone 2 is in the shape of an inverted cone.
Further, the horizontal inclination angle of the inverted cone of the sedimentation zone 2 is 45-60 degrees.
Further, the dynamic membrane 31 has a membrane pore size of 200-500 meshes, and is made of nylon or stainless steel.
Further, the solid-liquid separation zone 3 is located at 1/2 to 2/3 of the height of the reactor.
Further, the gas collection zone 4 occupies 1/3 of the reactor volume.
The working flow of the invention is as follows: the solid waste to be fermented is added into the reactor through a feed inlet 11, is uniformly mixed with zymocyte in the reactor under the action of a stirrer 13, and is subjected to hydrolysis, acidification, acetylation and methanogenesis in a biological reaction zone 1; the generated gas gradually rises to the gas collecting area 4 and is sent to the gas collecting and purifying device through the gas outlet 41; the solid waste which is not completely fermented and zymophyte are filtered by a dynamic membrane 31 in a solid separation zone 3, so that solid-liquid separation is realized; the fermentation liquor is discharged from the water outlet 36 to be treated, the solid waste and the fermentation bacteria are trapped on the dynamic membrane to form a filter cake layer, then gradually fall off and sink, and enter the biological reaction zone 1 through the sedimentation zone 2 to continue participating in the biological fermentation process. Therefore, the SRT and the HRT of the anaerobic fermentation system are independently controlled, the number of the fermentation bacteria is further improved, and the stable operation of the efficient anaerobic fermentation system is realized.
The embodiments described in the present specification are merely examples of implementation forms of the inventive concept, and the scope of protection of the present invention should not be construed as being limited to the specific forms set forth in the embodiments, and the scope of protection of the present invention and equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.
Claims (5)
1. The high-efficiency anaerobic fermentation dynamic membrane bioreactor is characterized in that a biological reaction zone (1), a sedimentation zone (2), a solid-liquid separation zone (3), a gas collection zone (4) and a water bath heat preservation layer (5) are arranged in the reactor; wherein, the top of the reactor is provided with a feed inlet (11), the bottom is provided with a mud discharge opening (12), and the reactor is internally provided with a stirrer (13); the water bath heat preservation layer (5) is an outer wall interlayer of the reactor and is used for realizing heat preservation of the reactor, the solid-liquid separation zone (3) is positioned in the middle of the reactor, the sedimentation zone (2) is positioned below the solid-liquid separation zone (3), the biological reaction zone (1) is positioned below the sedimentation zone (2), and the gas collection zone (4) is positioned above the solid-liquid separation zone (3); the solid-liquid separation zone (3) comprises a dynamic membrane (31), the dynamic membrane (31) is placed in the middle of the double-layer gasket (33) and is fixed on the dynamic membrane supporting layer (32) through a fixed ring (34) and a fixed screw (35), and a water outlet (36) is formed in the side wall of the reactor at a position corresponding to the solid-liquid separation zone (3); the gas collecting area (4) is connected with a gas collecting tank pipeline through a gas outlet (41) and a water sealed bottle; the water bath heat preservation (5) comprises a water bath inlet (51) and a water bath outlet (52), is connected with a constant-temperature water bath through a circulating pump pipeline, a stirring shaft of the stirrer (13) penetrates through the gas collecting area (4), the solid-liquid separation area (3) and the sedimentation area (2), stirring blades are located the biological reaction area (1), the double-layer gasket (33) is installed on the inner wall of the reactor, and the sedimentation area (2) is in an inverted cone-shaped.
2. The efficient anaerobic fermentation dynamic membrane bioreactor according to claim 1, wherein the horizontal inclination angle of the inverted cone of the sedimentation zone (2) is 45-60.
3. The efficient anaerobic fermentation dynamic membrane bioreactor according to claim 1, wherein the membrane pore size of the dynamic membrane (31) is 200-500 meshes, and the material is nylon mesh or stainless steel mesh.
4. A high efficiency anaerobic fermentation dynamic membrane bioreactor according to claim 1, wherein the solid-liquid separation zone (3) is located at 1/2-2/3 of the height of the reactor.
5. A high efficiency anaerobic fermentation dynamic membrane bioreactor according to claim 1, wherein the gas collection zone (4) occupies 1/3 of the reactor volume.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710698738.3A CN107384753B (en) | 2017-08-15 | 2017-08-15 | High-efficiency anaerobic fermentation dynamic membrane bioreactor |
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| CN201710698738.3A CN107384753B (en) | 2017-08-15 | 2017-08-15 | High-efficiency anaerobic fermentation dynamic membrane bioreactor |
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| CN107384753A CN107384753A (en) | 2017-11-24 |
| CN107384753B true CN107384753B (en) | 2024-01-23 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111440705B (en) * | 2020-04-02 | 2023-08-22 | 西安建筑科技大学 | External dynamic membrane anaerobic fermentation system and method |
| CN111439849A (en) * | 2020-05-19 | 2020-07-24 | 西安建筑科技大学 | Plate frame immersed dynamic membrane bioreactor |
| CN114133124A (en) * | 2020-09-03 | 2022-03-04 | 上海城投污水处理有限公司 | Anaerobic dynamic membrane bioreactor |
| CN114262053A (en) * | 2022-01-17 | 2022-04-01 | 西安建筑科技大学 | Efficiency enhanced regulation and control method for anaerobic dynamic membrane fermentation system |
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| CN207143230U (en) * | 2017-08-15 | 2018-03-27 | 西安建筑科技大学 | New and effective anaerobic fermentation bioreactor of dynamic membrane |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20160002582A1 (en) * | 2014-07-07 | 2016-01-07 | Chiu-Yue Lin | High Efficiency Biometric Device For Producing Hydrogen And Methane |
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2017
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Patent Citations (7)
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| WO2012156169A1 (en) * | 2011-05-16 | 2012-11-22 | Lenzing Technik Gmbh | Device for separating gases from a suspension |
| CN102583730A (en) * | 2012-02-22 | 2012-07-18 | 苏州科技学院 | Novel anaerobic ammonium oxidation reactor |
| CN102951734A (en) * | 2012-11-26 | 2013-03-06 | 同济大学 | Wastewater treatment device with anaerobic dynamic membrane reactor |
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