CN210085457U - Series tubular fiber membrane device for enriching denitrifying anaerobic methane oxidation microorganisms - Google Patents
Series tubular fiber membrane device for enriching denitrifying anaerobic methane oxidation microorganisms Download PDFInfo
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- CN210085457U CN210085457U CN201920426295.7U CN201920426295U CN210085457U CN 210085457 U CN210085457 U CN 210085457U CN 201920426295 U CN201920426295 U CN 201920426295U CN 210085457 U CN210085457 U CN 210085457U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 116
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000001301 oxygen Substances 0.000 claims abstract description 19
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- 229910002651 NO3 Inorganic materials 0.000 description 2
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Abstract
The utility model discloses a series tubular fiber membrane device for enriching denitrifying anaerobic methane oxidation microorganisms. The system comprises a series reactor system, a water inlet and outlet system and a gas inlet and outlet system. The series reactor system is formed by connecting a certain number of tubular hollow fiber membrane reactors in series. The single-tube hollow fiber membrane reactor comprises a cylinder and a hollow fiber membrane bundle. The water inlet system comprises a water inlet tank, a peristaltic pump and a water inlet pipe; the water outlet system comprises an overflow pipe, an overflow bottle, a water outlet pipe and a water outlet tank. The gas inlet system comprises a methane steel cylinder, a trunk gas inlet pipe and a branch gas inlet pipe; the air outlet system comprises a branch air outlet pipe, a branch air outlet valve, an air outlet confluence plate, a trunk air outlet pipe and an air bag. The utility model discloses the gradient that utilizes the change of tube side can realize dissolved oxygen concentration subdues, and the dissolved oxygen in the aerobic microorganisms consumption water of reactor front end provides the anaerobism condition for rear end anaerobism methane oxidation microorganism to effectively enrichment denitrification type anaerobism methane oxidation microorganism.
Description
Technical Field
The utility model belongs to enrichment device field is cultivateed to the microorganism, concretely relates to enrichment denitrification anaerobism methane oxidation microorganism's series connection tubular fibrous membrane device.
Background
The denitrifying anaerobic methane oxidation (N-DAMO) microorganism comprises nitrate type anaerobic methane oxidation archaea (Na-DAMO) and nitrite type anaerobic methane oxidation bacteria (Ni-DAMO), can couple anaerobic oxidation of methane and reduction process of nitrate or nitrite, and has the following theoretical equation of Na-DAMO and Ni-DAMO mediated methane oxidation:
in recent years, with the introduction of sewage treatment concept plants, low-carbon treatment and energy development in sewage treatment plants have become a consensus for sustainable development. The N-DAMO microorganisms are capable of utilizing methane produced during anaerobic digestion of sludge to reduce nitrate nitrogen at the end of a conventional wastewater treatment process to nitrogen. On one hand, methane is oxidized into carbon dioxide to be discharged, and the greenhouse effect of discharged gas is reduced; on the other hand, the methane generated in situ is used as an electron acceptor, so that an additional organic carbon source in the traditional denitrification process is omitted, and the operation cost is saved. Therefore, the N-DAMO microorganism has a good engineering application prospect.
Microorganism-mediated denitrification-type anaerobic methane oxidation processes involve gas-phase, liquid-phase, and biological three-phase reactions. The types of reactors used in the current N-DAMO microorganism enrichment work include a magnetic stirring type, a magnetic stirring airlift type and an integrated hollow fiber membrane reactor. The magnetic stirring airlift increases the gas-liquid contact area by adopting a micropore aeration mode on the basis of the magnetic stirring mode, and strengthens the methane mass transfer process; the integrated hollow fiber membrane reactor ensures that the biological phase is attached to the surface of the membrane on the premise of ensuring the mass transfer effect of gas, reduces the loss of biomass in the continuous flow operation process, and is usually provided with liquid external circulation to ensure that the liquid phase in the reactor is close to a completely mixed state. Research shows that denitrifying anaerobic methane oxidation microorganisms need to grow under strict anaerobic conditions, so that a water inlet tank of a full-mixed reactor in an experimental scale needs to be subjected to pre-aeration treatment to remove dissolved oxygen in inlet water, but outlet water of a secondary sedimentation tank in an actual sewage treatment plant cannot reach a complete anaerobic state. In addition, the integral hollow fiber membrane reactor has the problem that the whole reaction device collapses after membrane pollution, and the adjustability in the actual wastewater treatment process is poor.
Based on above problem, this patent proposes a denitrification type anaerobism methane oxidation microorganism enrichment is with tubular hollow fiber membrane device of series connection. The fluid flow state in the device is close to the horizontal plug flow state, and the liquid phase conditions including substrate concentration, dissolved oxygen, pH and the like can change in a gradient mode along with different tube passes. For wastewater containing a certain dissolved oxygen concentration, the device can pre-consume the dissolved oxygen in the water body by utilizing the aerobic microorganisms at the front end, and provide proper growth conditions for the denitrification type anaerobic methane oxidation microorganisms at the rear end. Meanwhile, the flexibility of the reactor system is improved by the arrangement of the series system, and the problem of membrane pollution can be solved by replacing part of the tubular hollow fiber membrane reactor or adjusting the position of the tubular hollow fiber membrane reactor in actual operation.
Disclosure of Invention
The utility model aims at solving the problem that the integral type hollow fiber membrane reactor faces the whole breakdown of membrane pollution rear device when intaking can not reach complete anaerobic state among the prior art to a series connection tubular fiber membrane device of enrichment denitrification anaerobism methane oxidation microorganism is provided, make denitrification type anaerobism methane oxidation microorganism have certain buffer capacity to the dissolved oxygen of intaking in the enrichment process, provide the higher microorganism culture apparatus of a flexibility simultaneously, have better adaptability to the processing of actual waste water.
The utility model discloses the technical scheme who specifically adopts as follows:
a series tubular fiber membrane device for enriching denitrifying anaerobic methane oxidation microorganisms comprises a series reactor system, a water inlet system, a water outlet system, a gas inlet system and a gas outlet system;
the series reactor system comprises a plurality of tubular hollow fiber membrane reactors and a plurality of series pipes; each tubular hollow fiber membrane reactor comprises a cylinder body and a hollow fiber membrane bundle, wherein a water inlet and an air inlet are formed in the bottom of the cylinder body, a water outlet and an air outlet are formed in the top of the cylinder body, the hollow fiber membrane bundle is axially arranged in an inner cavity of the cylinder body, the top end of the hollow fiber membrane bundle is closed, the bottom end of the hollow fiber membrane bundle is communicated with the air inlet, and a dissolved oxygen probe and a pH probe are arranged in the cylinder; the water flow paths of the plurality of tubular hollow fiber membrane reactors are connected in series, and the water outlet of the upstream tubular hollow fiber membrane reactor is connected with the water inlet of the downstream tubular hollow fiber membrane reactor through a series pipe;
the water inlet system comprises a water inlet tank, a water inlet pump and a water inlet pipe, the water inlet pipe is connected with the water inlet tank and a water inlet of the tubular hollow fiber membrane reactor positioned at the foremost end of the serial flow path, and the water inlet pump is arranged on the water inlet pipe;
the water outlet system comprises an overflow pipe, an overflow bottle, a water outlet pipe and a water outlet tank, wherein the overflow pipe is connected with the overflow bottle and a water outlet of the tubular hollow fiber membrane reactor positioned at the tail end of the serial flow path, and the overflow bottle is connected with the water outlet tank through the water outlet pipe;
the gas inlet system comprises a methane steel cylinder, a trunk gas inlet pipe and branch gas inlet pipes, wherein one end of the trunk gas inlet pipe is connected with a gas outlet of the methane steel cylinder, the other end of the trunk gas inlet pipe is respectively connected with a plurality of branch gas inlet pipes, and each branch gas inlet pipe is respectively connected with a gas inlet of a tubular hollow fiber membrane reactor; a main air inlet pipe close to the air outlet is provided with a main air inlet valve and a main barometer, and each branch air inlet pipe is provided with a branch air inlet valve and a branch barometer respectively;
the gas outlet system comprises branch gas outlet pipes, a confluence plate, a trunk gas outlet pipe and a gas bag, wherein the gas outlet of each tubular hollow fiber membrane reactor is connected to the confluence plate through the trunk gas outlet pipe with a branch gas outlet valve, and is connected to the gas bag through the trunk gas outlet pipe after confluence through the confluence plate.
Preferably, the length-diameter ratio of the tubular hollow fiber membrane reactor is 8-20.
Preferably, the filling density of membrane filaments in the tubular hollow fiber membrane reactor is 100-500 m2/m3。
Preferably, the series reactor system has at least 3 tubular hollow fiber membrane reactors.
Preferably, the tubular hollow fiber membrane reactor is connected in series in a horizontal and transverse series manner, a vertical and vertical series manner or a horizontal and vertical combined series manner.
Preferably, the water inlet pump adopts a peristaltic pump.
Preferably, the water flow inlet of the overflow bottle is lower than the outlet, and the height of the outlet is flush with the highest liquid level height of the tubular hollow fiber membrane reactor.
The utility model discloses beneficial effect who has: 1) the hollow fiber membrane is used for ventilation, so that the gas-liquid contact area and the methane partial pressure are ensured, the excellent methane mass transfer effect is ensured, and meanwhile, the biological phase is attached to the surface of the hollow fiber membrane, so that the biological interception effect is good; 2) the flow state of fluid in the device is close to the flat push flow state by controlling the flow rate by using the tubular reactor, and the tube pass is increased by using a series connection mode, so that the front-end microorganism consumes dissolved oxygen in a water body, an anaerobic environment is provided for the back-end denitrifying anaerobic methane-oxidizing microorganism, and the separation of enriched target microorganisms and aerobic microorganisms is facilitated; 3) the whole system is connected in series through a plurality of tubular hollow fiber membrane reactors, the number and the position of the reactors can be flexibly adjusted, and the reactor has strong buffering capacity on water inflow load impact.
Drawings
FIG. 1 is a schematic diagram of a series tubular fiber membrane device for the denitrification of anaerobic methane-oxidizing microorganisms.
FIG. 2 is a schematic of a tubular hollow fiber membrane reactor.
Reference numbers in the figures: the system comprises a series reactor system I, a water inlet system II, a water outlet system III, a gas inlet system IV, a gas outlet system V, a tubular hollow fiber membrane reactor 1, a series pipe 2, a cylinder 3, a hollow fiber membrane bundle 4, a water inlet 5, a water outlet 6, a liquid sampling port 7, a gas inlet 8, a gas outlet 9, a water inlet tank 10, a water inlet pump 11, a water inlet pipe 12, an overflow pipe 13, an overflow bottle 14, a water outlet pipe 15, a water outlet tank 16, a methane steel bottle 17, a trunk gas inlet valve 18, a trunk gas pressure gauge 19, a trunk gas inlet pipe 20, a branch gas inlet pipe 21, a branch gas inlet valve 22, a branch gas pressure gauge 23, a branch gas outlet valve 24, a branch gas outlet pipe 25, a confluence plate 26, a trunk gas outlet pipe 27, a gas bag 28, an.
Detailed Description
For a further understanding of the present invention, reference should be made to the following further description and specific examples, taken in conjunction with the accompanying drawings, and it is to be understood that the description is intended to further illustrate the features and advantages of the present invention, and not to limit the scope of the invention.
As shown in figure 1, the embodiment of the present invention provides a series tubular fiber membrane device for enriching denitrifying anaerobic methane-oxidizing microorganisms, which comprises a series reactor system I, a water inlet system II, a water outlet system III, an air inlet system IV and an air outlet system V. The structure and connection of each part will be described in detail below.
The series reactor system I comprises a plurality of tubular hollow fiber membrane reactors 1 and a plurality of series pipes 2. Each tubular hollow fiber membrane reactor 1 comprises a cylinder 3 and a hollow fiber membrane bundle 4, wherein the cylinder 3 is hollow and cylindrical, and two ends of the cylinder are closed. The bottom of the cylinder 3 is provided with a water inlet 5 and an air inlet 8, the top of the cylinder 3 is provided with a water outlet 6 and an air outlet 9, the hollow fiber membrane bundle 4 is axially arranged in the inner cavity of the cylinder 3, and the hollow fiber membrane bundle 4 is distributed in a single-end closed mode, namely the top end is closed, the bottom end is not closed and is communicated with the air outlet 9. The cylinder 3 is internally provided with a dissolved oxygen probe 30 and a pH probe 31, and the dissolved oxygen probe 30 and the pH probe 31 extend into the cylinder below the liquid level. The water flow paths of the plurality of tubular hollow fiber membrane reactors 1 are connected in series, the water outlet 6 of the upstream tubular hollow fiber membrane reactor 1 is connected with the water inlet 5 of the downstream tubular hollow fiber membrane reactor 1 through the series pipe 2, and then the water flow paths are connected one by one, so that the water flow in the reactor can flow step by step.
The water inlet system II comprises a water inlet tank 10, a water inlet pump 11 and a water inlet pipe 12, and suspended inoculated sludge and culture medium can be stored in the water inlet tank 10 as required. The water inlet pipe 12 is connected with the water inlet tank 10 and the water inlet 5 of the tubular hollow fiber membrane reactor 1 positioned at the foremost end of the serial flow path, and the water inlet pump 11 is arranged on the water inlet pipe 12 and used for providing water inlet power. In order to realize the quantitative feeding, the water inlet pump 11 can be realized by a peristaltic pump.
The water outlet system III comprises an overflow pipe 13, an overflow bottle 14, a water outlet pipe 15 and a water outlet tank 16, wherein the overflow pipe 13 is connected with the overflow bottle 14 and a water outlet 6 of the tubular hollow fiber membrane reactor 1 positioned at the tail end of the serial flow path. The overflow bottle 14 is used for enabling the effluent of the series reactor system I to be in an overflow state. The overflow bottle 14 is provided with a water inlet and a water outlet, the height of the water inlet is lower than that of the water outlet, and the height of the water outlet is flush with the highest liquid level of the tubular hollow fiber membrane reactor 1. The water outlet of the overflow bottle 14 is connected with a water outlet tank 16 through a water outlet pipe 15.
The air inlet system IV comprises a methane steel cylinder 17, a trunk air inlet pipe 20 and branch air inlet pipes 21, wherein one end of the trunk air inlet pipe 20 is connected with an air outlet of the methane steel cylinder 17, and the other end of the trunk air inlet pipe 20 is divided into multiple paths which are respectively connected with the branch air inlet pipes 21. Each branch air inlet pipe 21 is connected with one air inlet 8 of only one tubular hollow fiber membrane reactor 1. And a trunk air inlet valve 18 and a trunk air pressure gauge 19 are arranged on a trunk air inlet pipe 20 close to the air outlet, and a branch air inlet valve 22 and a branch air pressure gauge 23 are respectively arranged on each branch air inlet pipe 21 and are used for adjusting the air pressure of the trunk and the branch.
The air outlet system V comprises a branch air outlet pipe 25, a confluence plate 26, a trunk air outlet pipe 27 and an air bag 28, wherein an air outlet 9 of each tubular hollow fiber membrane reactor 1 is respectively connected to different air inlets of the confluence plate 26 through the trunk air outlet pipe 27 with a branch air outlet valve 24, and is uniformly connected to the air bag 28 through the trunk air outlet pipe 27 after confluence through the confluence plate 26, so that the air is collected and can be used for subsequent analysis.
In the present embodiment, the aspect ratio of the tubular hollow fiber membrane reactor 1 is 8 to 20. The filling density of membrane filaments (hollow fiber membrane surface area: effective volume of reactor) in the tubular hollow fiber membrane reactor 1 is 100-500 m2/m3. In the series reactor system I, the number of the tubular hollow fiber membrane reactors 1 can be adjusted according to the needs, and the number of the tubular hollow fiber membrane reactors 1 is at least 3 or more. Different numbers can change the length of the pipe pass, and the impact buffering capacity to the water inlet load can be flexibly changed. In addition, the tubular hollow fiber membrane reactor 1 is connected in series in a horizontal transverse series manner, a vertical series manner or a horizontal and vertical combined series manner. The horizontal and horizontal series connection means that each tubular hollow fiber membrane reactor 1 is horizontally arranged, the axial direction of the tubular hollow fiber membrane reactor is the horizontal direction, and the flow direction of internal fluid is horizontal flow; the vertical serial connection means that each tubular hollow fiber membrane reactor 1 is vertically arranged, the axial direction of the tubular hollow fiber membrane reactor is vertical, and the flow direction of internal fluid flows vertically; the horizontal and vertical combined serial connection means that part of the tubular hollow fiber membrane reactor 1 is horizontally arranged, part of the tubular hollow fiber membrane reactor is vertically arranged, and the flow direction of fluid in a serial flow path is in a horizontal and vertical flow state. In the present embodiment, which is shown in a vertical series arrangement, both the headmost and the endmost tubular hollow fiber membrane reactors 1 employ upwelling.
In addition, an automatic control box 29 can be arranged in the device, and the automatic control box 29 is connected with a dissolved oxygen probe 30 and a pH probe 31 and is used for receiving the real-time dissolved oxygen concentration and pH so as to carry out feedback control. The automatic control box 29 can also be connected with other electric elements to realize the automatic operation of the whole device. It should be noted that the automatic control box 29 is not an essential component of the present invention, and may be selected or replaced as needed.
Based on above-mentioned series connection tubular hollow fiber membrane device, the utility model provides an enrichment denitrification anaerobism methane oxidation microorganism enrichment method, its step is as follows:
adding suspended inoculated sludge with a certain sludge concentration into a water inlet tank 10, starting a water inlet pump 11 in a water inlet system II, continuously inoculating sludge to a series reactor system I through a water inlet pipe 12, inoculating the sludge to the surface of a hollow fiber membrane bundle 4 in a series tubular hollow fiber membrane reactor 1, and then closing the water inlet pump 11; replacing the liquid in the water inlet tank 10 with a fresh culture medium, starting the water inlet pump 11 to enable the fresh culture medium to enter the on-way tubular hollow fiber membrane reactor 1 through the water inlet pipe 12, and adjusting the flow to enable the fluid state in the reactor to be in a flat push flow state; the culture medium flows through the whole series reactor system I through the series pipe 2 and finally enters the overflow bottle 14 through the overflow pipe 13, and after the liquid level in the overflow bottle 14 is level with the liquid level in the tubular hollow fiber membrane reactor 1, the effluent flows through the water outlet pipe 15 and enters the water outlet tank 16; opening and adjusting a main air inlet valve 18 in an air inlet system IV to enable the reading of a main air pressure gauge 19 to be about 1.2atm, then sequentially opening and adjusting branch air inlet valves 22 to enable the reading of each branch air pressure gauge 23 to be consistent, and then adjusting the main air inlet valve 18 to enable the reading of each branch air inlet valve to be about 1.2 atm; methane gas in the methane steel cylinder 17 flows into the tubular hollow fiber membrane reactor 1 through a trunk gas inlet pipe 20 and a branch gas inlet pipe 21, overflows through the side wall of the hollow fiber membrane bundle 4 and is dissolved in a liquid phase for microorganisms on the membrane to utilize; when the degree of the branch barometer 23 is reduced to below 1.0atm, the main air inlet valve 18 and the branch air inlet valve 22 are readjusted to restore the branch air pressure to about 1.2 atm; gas generated in the biological reaction process enters a branch gas outlet pipe through a gas outlet 9 at the top of the tubular hollow fiber membrane reactor 1, a branch gas outlet valve 24 is periodically opened, the gas is discharged into a confluence plate 26, and finally enters a gas bag 28 through a main gas outlet pipe 27; keeping a fresh culture medium continuously entering each tubular hollow fiber membrane reactor 1 along the tube, gradually consuming dissolved oxygen in the fresh culture medium by aerobic microorganisms at the front end of the serial flow path, forming a dissolved oxygen concentration gradient reduction state along the tube, providing anaerobic conditions for anaerobic methane-oxidizing microorganisms at the rear end, and gradually separating the aerobic methane-oxidizing microorganisms and the denitrifying anaerobic methane-oxidizing microorganisms along the tube to realize enrichment of the denitrifying anaerobic methane-oxidizing microorganisms.
In the method, in a series reactor system I, the fluid flow state in each tubular hollow fiber membrane reactor 1 is in a horizontal plug flow state or a nearly horizontal plug flow state. In the enrichment process, the pH value in the tubular hollow fiber membrane reactor 1 should be always maintained in the range of 7.0-7.5, so as to provide an optimal growth environment for denitrifying anaerobic methane oxidation microorganisms. The gas circuits in the series reactor system I are connected in parallel, the air pressure in the branch gas inlet pipe 21 can be adjusted in a coordinated mode through the main gas inlet valve 18 and the branch gas inlet valve 22, and the air pressure of each branch is equal and is within the range of 1-2 atm.
The utility model discloses the tubular hollow fiber membrane device of establishing ties who relates to in possess great draw ratio, similar with the tubular reactor outward appearance in chemical industry field, the inside hollow fiber membrane of packing the density. The configuration of the series pipe type determines that the fluid flow state inside the reactor is a plug flow or near plug flow state. Under the stable condition, the utility model discloses a this kind of plug flow type reactor can be seen as the development of SBR reactor reaction process along with time at the space dimension, and the concrete expression can change along with the change of tube side for the inside reaction condition of plug flow type reactor, and certain tube side department corresponds certain time point in the SBR reaction cycle. The characteristics provide favorable conditions for realizing the separation of different types of microorganisms in the reactor. Reaction conditions in a traditional integrated full-mixing reactor are in a homogeneous phase or near-homogeneous phase state, and micro dissolved oxygen carried in inlet water may influence the whole reactor, so that denitrification type anaerobic methane-oxidizing bacteria and aerobic methane-oxidizing bacteria coexist in the enriched substances of a plurality of full-mixing reactors. Compared with the prior art, the plug flow reactor has a certain buffer and consumption capacity for trace dissolved oxygen in the inlet water due to the long tube pass; meanwhile, the dissolved oxygen condition is favorable for realizing the separation of aerobic methane-oxidizing microorganisms and denitrification type anaerobic methane-oxidizing microorganisms along with the change of the tube pass. From the enrichment perspective, the plug flow reactor of the utility model is beneficial to obtaining the enrichment of the denitrification anaerobic methane microorganisms with higher purity.
Additionally, the utility model discloses in the tubular hollow fiber membrane device of establishing ties who relates to be a membrane reactor, the single-ended of the hollow fiber membrane of the inside packing of device seals, and the other end is connected with the steel bottle gas circuit. Under the operation state, methane gas in the gas path enters a cavity in the middle of each hollow fiber membrane, slowly overflows from the side wall under a certain pressure and is dissolved in a liquid phase outside the membrane. According to different membrane materials, the hollow fiber membrane can bear different pressures which are generally higher than atmospheric pressure, so that the concentration of methane gas permeating into a liquid phase when reaching the critical pressure is higher than the concentration of atmospheric pressure headspace diffusion. In addition, the filling of the hollow fiber membrane can greatly increase the gas-liquid contact area, further promote the gas-liquid phase mass transfer of methane, and provide enough electron donors for the main metabolic reaction of the denitrification type anaerobic methane oxidation microorganisms.
Therefore, the utility model discloses combine tubular reactor and membrane reactor, can not only realize the separation of denitrification type anaerobism methane oxidation microorganism and good oxygen methane oxidation microorganism, can also increase the mass transfer efficiency of methane, strengthen reaction unit's biology and hold back the function to be favorable to realizing the directional high-efficient enrichment of denitrification type anaerobism methane oxidation microorganism.
The above-mentioned embodiment is just a preferred scheme of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit and scope of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall into the protection scope of the claims of the present invention.
Claims (7)
1. A series tubular fiber membrane device for enriching denitrifying anaerobic methane oxidation microorganisms is characterized by comprising a series reactor system (I), a water inlet system (II), a water outlet system (III), a gas inlet system (IV) and a gas outlet system (V);
the series reactor system (I) comprises a plurality of tubular hollow fiber membrane reactors (1) and a plurality of series pipes (2); each tubular hollow fiber membrane reactor (1) comprises a cylinder body (3) and a hollow fiber membrane bundle (4), wherein the bottom of the cylinder body (3) is provided with a water inlet (5) and an air inlet (8), the top of the cylinder body (3) is provided with a water outlet (6) and an air outlet (9), the hollow fiber membrane bundle (4) is axially arranged in the inner cavity of the cylinder body (3), the top end of the hollow fiber membrane bundle (4) is closed, the bottom end of the hollow fiber membrane bundle is communicated with the air inlet (8), and a dissolved oxygen probe (30) and a pH probe (31) are arranged in the cylinder body (3; the water flow paths of a plurality of tubular hollow fiber membrane reactors (1) are connected in series, and a water outlet (6) of the upstream tubular hollow fiber membrane reactor (1) is connected with a water inlet (5) of the downstream tubular hollow fiber membrane reactor (1) through a series pipe (2);
the water inlet system (II) comprises a water inlet tank (10), a water inlet pump (11) and a water inlet pipe (12), the water inlet pipe (12) is connected with the water inlet tank (10) and a water inlet (5) of the tubular hollow fiber membrane reactor (1) positioned at the foremost end of the series flow path, and the water inlet pump (11) is arranged on the water inlet pipe (12);
the water outlet system (III) comprises an overflow pipe (13), an overflow bottle (14), a water outlet pipe (15) and a water outlet tank (16), the overflow pipe (13) is connected with the overflow bottle (14) and a water outlet (6) of the tubular hollow fiber membrane reactor (1) positioned at the tail end of the serial flow path, and the overflow bottle (14) is connected with the water outlet tank (16) through the water outlet pipe (15);
the air inlet system (IV) comprises a methane steel cylinder (17), a trunk air inlet pipe (20) and branch air inlet pipes (21), one end of the trunk air inlet pipe (20) is connected with an air outlet of the methane steel cylinder (17), the other end of the trunk air inlet pipe is respectively connected with a plurality of branch air inlet pipes (21), and each branch air inlet pipe (21) is respectively connected with an air inlet (8) of one tubular hollow fiber membrane reactor (1); a main air inlet pipe (20) close to the air outlet is provided with a main air inlet valve (18) and a main air pressure gauge (19), and each branch air inlet pipe (21) is provided with a branch air inlet valve (22) and a branch air pressure gauge (23) respectively;
the air outlet system (V) comprises a branch air outlet pipe (25), a confluence plate (26), a trunk air outlet pipe (27) and an air bag (28), wherein the air outlet (9) of each tubular hollow fiber membrane reactor (1) is respectively connected to the confluence plate (26) through the trunk air outlet pipe (27) with a branch air outlet valve (24), and is connected to the air bag (28) through the trunk air outlet pipe (27) after confluence through the confluence plate (26).
2. The tubular fiber membrane device for enriching denitrifying anaerobic methane-oxidizing microorganisms according to claim 1, wherein the length-diameter ratio of the tubular hollow fiber membrane reactor (1) is 8 to 20.
3. The tubular fiber membrane device for enriching denitrifying anaerobic methane-oxidizing microorganisms according to claim 1, wherein the packing density of membrane filaments in the tubular hollow fiber membrane reactor (1) is 100 to 500m2/m3。
4. The apparatus of claim 1, wherein the series reactor system (I) comprises at least 3 tubular hollow fiber membrane reactors (1) or more.
5. The tubular fiber membrane device for enriching denitrifying anaerobic methane-oxidizing microorganisms according to claim 1, wherein the tubular hollow fiber membrane reactor (1) is connected in series in a horizontal transverse series, a vertical series or a combination of the horizontal and vertical series.
6. The apparatus for the enrichment of denitrifying anaerobic methane-oxidizing microorganisms according to claim 1, wherein the feed pump (11) employs a peristaltic pump.
7. The tubular fiber membrane device for enriching denitrifying anaerobic methane-oxidizing microorganisms according to claim 1, wherein the water inlet of the overflow bottle (14) is lower than the outlet, and the height of the outlet is flush with the highest liquid level of the tubular hollow fiber membrane reactor (1).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110004047A (en) * | 2019-03-29 | 2019-07-12 | 浙江大学 | The series connection tubular type hollow fiber membrane device and its method of gathering denitrifying type anaerobic methane oxidation microorganism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110004047A (en) * | 2019-03-29 | 2019-07-12 | 浙江大学 | The series connection tubular type hollow fiber membrane device and its method of gathering denitrifying type anaerobic methane oxidation microorganism |
| CN110004047B (en) * | 2019-03-29 | 2024-04-02 | 浙江大学 | Tandem tube type hollow fiber membrane device for enriching denitrification type anaerobic methane oxidation microorganisms and method thereof |
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