A pulsating anaerobic microorganism multiphase fluidized bed hydrogen-electricity combined supply system and its usage method

Abstract

The present invention provides a pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity combined supply system and a usage method, belonging to the technical field of sewage treatment. The system includes key components such as a constant temperature liquid storage tank, an anode chamber, a hydrogen production reaction chamber, etc., and realizes the smooth flow of liquids and gases through pipeline connection. To improve the reaction efficiency, key components such as a distributor, a particle confinement network, and a bubble generator are equipped in the system. The system inoculates microorganisms such as Escherichia coli and Shewanella, forms an efficient biofilm, and adds nano-Fe3O4 microbial film. The system combines pulsation with a steady liquid flow to improve efficiency and reduce energy consumption. The electric energy of the microbial fuel cell is introduced into the hydrogen production reaction chamber and the supercapacitor to realize the utilization and recovery of electric energy. At the same time, a monitoring computer and a water quality detector are used to monitor the generated voltage and water quality in real time. The present invention can make full use of the chemical energy in sewage, improve the energy conversion efficiency, meet the application requirements of higher levels, and at the same time, the reaction energy consumption is relatively low.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to a pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity combined supply system and a using method thereof. Background Art

[0002] In traditional sewage treatment processes, although pollutants in sewage can be effectively removed, several significant problems exist.

[0003] Firstly, traditional processes usually fail to effectively recover the chemical energy of organic matter in sewage, resulting in waste of resources. Especially when the sewage quality varies greatly, the treatment efficiency is often affected, and the treatment of high-concentration organic wastewater is particularly difficult. This not only limits the effectiveness of the sewage treatment process but also increases the treatment cost.

[0004] Secondly, most existing sewage treatment processes rely on physical and chemical methods, which have high energy consumption, and chemical agents are often required during the treatment process, further increasing the treatment cost and potentially bringing the risk of secondary pollution.

[0005] To overcome these problems, in recent years, microbial fuel cell technology has gradually attracted attention. A microbial fuel cell is a technology that combines the metabolic activities of microorganisms with electrochemical reactions and can directly convert the chemical energy in organic matter into electrical energy. This technology can use organic waste such as sewage and wastewater as fuel to generate electricity, achieving energy recovery and reducing energy consumption, and has strong sustainability. However, the energy conversion efficiency and treatment effect of a single microbial fuel cell technology are still limited when treating complex sewage.

[0006] Meanwhile, microbial hydrogen production by fermentation technology has also received much attention. This technology can decompose organic matter (such as glucose and starch) in sewage through anaerobic fermentation of microorganisms to produce hydrogen, and has the potential to become a clean energy production method. However, traditional microbial hydrogen production by fermentation processes still face many challenges in terms of treatment efficiency, energy conversion efficiency, and product separation. Summary of the Invention

[0007] The purpose of the present invention is to provide a pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity combined supply system and a using method thereof, which organically combines microbial anaerobic hydrogen production by fermentation and microbial fuel cell technology to achieve complementary advantages, cascade and fully utilize the chemical energy in sewage, and further improve the low-grade energy conversion efficiency of the system compared with a single technical form. A large number of by-products such as acetic acid and butyric acid are generated during the hydrogen production by fermentation process, and these by-products can be utilized in the microbial fuel cell. At the same time, an integrated and enhanced special structure biofilm method fluidized bed is used in the using process to replace the traditional suspended microbial reactor, further improving the mass transfer and reaction efficiency of the system.

[0008] To achieve the above object, the present invention provides a pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity combined supply system, including a constant-temperature liquid storage tank, the constant-temperature liquid storage tank is connected to the bottom of the anode chamber through a first connecting pipe, a first upper liquid chamber is arranged at the top of the anode chamber, a first liquid passing port is arranged on one side of the first upper liquid chamber, the first liquid passing port is connected to the second upper liquid chamber at the top of the hydrogen production reaction chamber through a second connecting pipe, an upper distributor is arranged in the second upper liquid chamber, the bottom of the hydrogen production reaction chamber is connected with a third connecting pipe, the other end of the third connecting pipe is provided with a three-way joint, the other two ends of the three-way joint are respectively connected with a diversion pipe and a pulsating liquid flow main pipe, the other end of the diversion pipe is connected with a liquid storage tank, the other end of the pulsating liquid flow main pipe is connected to the bottom side of the anode chamber, the hydrogen production reaction chamber is also connected to the bottom of the anode chamber through a stable liquid flow main pipe, one side of the anode chamber is also connected with a super capacitor through a wire, the super capacitor is connected with a monitoring computer, and the wire is also connected with a first electrode and a second electrode in the hydrogen production reaction chamber;

[0009] The upper side of the first upper liquid chamber is connected with an air bag through a second air vent, a second air valve is arranged between the second air vent and the air bag, and the air bag is respectively connected with a gas chromatograph analyzer, a pressure swing adsorption (PSA) hydrogen purifier and a methanol synthesis catalytic reactor;

[0010] An air vent is also arranged at the top of the hydrogen production reaction chamber, and the air vent is connected with a bubble generator in the anode chamber through a gas connecting pipe;

[0011] A particle limited area network is arranged in the hydrogen production reaction chamber, and the top diameter of the hydrogen production reaction chamber is larger than the bottom diameter.

[0012] Preferably, a first peristaltic pump, a first electric valve, a first flow meter and a third flow meter are sequentially arranged on the first connecting pipe in the direction from the constant-temperature liquid storage tank to the anode chamber.

[0013] Preferably, a second electric valve and a second flow meter are sequentially arranged on the second connecting pipe in the direction from the anode chamber to the hydrogen production reaction chamber.

[0014] Preferably, a first air valve and a gas flow meter are sequentially arranged on the gas connecting pipe in the direction from the hydrogen production reaction chamber to the anode chamber.

[0015] Preferably, a third electric valve, a third peristaltic pump and a third flow meter are sequentially arranged on the stable liquid flow main pipe in the direction from the hydrogen production reaction chamber to the anode chamber;

[0016] A pulsating return water solenoid valve, a second peristaltic pump and a fourth flow meter are sequentially arranged on the pulsating liquid flow main pipe in the direction from the hydrogen production reaction chamber to the anode chamber, and the pulsating return water solenoid valve is also connected with a signal generator.

[0017] Preferably, a plurality of anodes and air cathodes are arranged in the anode chamber. A second liquid inlet is further arranged on one side of the anode chamber. The other end of the second liquid inlet is connected to a water quality detector. A screen and a pulsating liquid flow nozzle are sequentially arranged below the bubble generator inside the anode chamber.

[0018] The present invention also provides a method for using the pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity combined supply system as described above, including the following steps:

[0019] Step S1, prepare a microbial film;

[0020] Step S11, inoculate and culture Escherichia coli, Clostridium, and Desulfovibrio respectively, and culture at 37°C. After the bacteria grow stably, add the prepared modified polypropylene particles to the three bacterial solutions, start the formation of the biofilm, and make the microorganisms attach to the surface of the modified polypropylene particles and grow. After 48 hours of culture, a hydrogen-producing microbial film is obtained;

[0021] Step S12, inoculate and culture Shewanella and Geobacter sulfurreducens respectively, and culture at 37°C. After the bacteria grow stably, add coconut shell activated carbon particles with a diameter of 1 mm, start the formation of the biofilm, and obtain an electricity-producing biofilm;

[0022] Step S13, grind and screen magnetite, prepare nano-Fe3O4 by ultrasonic precipitation method, then mix the sludge obtained from the sewage treatment plant with nano-Fe3O4, and perform gradient domestication using wastewater and garbage leachate as nutrients to obtain a microbial film containing nano-Fe3O4;

[0023] Step S2, start the first peristaltic pump, open the first electric valve and the second electric valve, and inject the sewage in the constant temperature liquid storage tank into the anode chamber and the hydrogen production reaction chamber until the sewage accounts for 95% of the volume of the anode chamber and 100% of the volume of the hydrogen production reaction chamber, and then close the first electric valve;

[0024] Add the electricity-producing biofilm particles and the microbial film particles containing nano-Fe3O4 to the anode chamber, and add the hydrogen-producing microbial film particles to the particle limit network in the hydrogen production reaction chamber;

[0025] Start the second peristaltic pump and the third peristaltic pump, open the third electric valve, the pulsating return water solenoid valve, and the signal generator, so that the sewage in the hydrogen production reaction chamber and the by-products during the fermentation process enter the anode chamber through the steady liquid flow main pipe and the pulsating liquid flow main pipe. Among them, the steady liquid flow enters through the lower distributor of the pulsating liquid flow nozzle, and the pulsating liquid flow is ejected from the pulsating liquid flow outlet. After the pulsating liquid flow is ejected, it disturbs the flow field in the anode chamber;

[0026] Step S3, after the reaction starts, open the first gas valve so that the hydrogen and carbon dioxide generated in the hydrogen production reaction chamber are introduced into the anode chamber through the gas communication pipe, and bubbles are generated through the bubble generator at the bottom of the anode chamber to further disturb the flow field;

[0027] Open the second gas valve to collect the mixed gas generated by the reaction into the gas bag. First, detect it with a gas chromatograph analyzer. After the detection is completed, classify and purify 50% of the gas in the pressure swing adsorption hydrogen purifier, and synthesize methanol with the other 50% in the methanol synthesis catalytic reactor;

[0028] Step S4, during the sewage treatment process, 50% of the electric energy generated in the anode chamber is introduced into the hydrogen production reaction chamber to promote the bacterial metabolism process by applying voltage, accelerating the decomposition of organic matter and the generation of hydrogen, and the other 50% is stored in the supercapacitor;

[0029] Use the monitoring computer to record the voltage data every 30 minutes, and use the water quality detector to detect the water quality every 24 hours;

[0030] When the voltage drops to 100 mV and the COD content in the sewage is less than 100 mg / L, the ammonia nitrogen content is less than 25 mg / L, and the phosphorus element content is less than 3 mg / L, open the fourth electric valve to discharge the treated sewage into the liquid storage tank. After the sewage in the anode chamber and the hydrogen production reaction chamber is drained, close the fourth electric valve;

[0031] Continue to supplement new sewage from the constant temperature liquid storage pool into the hydrogen production reaction chamber and the anode chamber to complete the replacement of sewage in one cycle.

[0032] Preferably, the preparation method of the modified polypropylene particles is as follows: First, polish the polypropylene particles with sandpaper to increase the surface roughness. Immerse the polished particles in a 10 mol / L hydrochloric acid solution for half an hour. Rinse the taken-out particles 5 times in deionized water and dry them in a drying oven at 60 °C for 3 h to obtain the modified polypropylene particles.

[0033] Therefore, the present invention adopts the above-mentioned pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity co-supply system and its use method, and the beneficial technical effects are as follows: It organically combines microbial anaerobic fermentation for hydrogen production and microbial fuel cell technology, realizes complementary advantages, and makes full use of the chemical energy in sewage in a cascaded manner, further improving the conversion efficiency of low-grade energy in the system compared with a single technical form. Since the theoretical energy conversion rate of microbial anaerobic fermentation for hydrogen production is higher than the Coulomb efficiency of microbial fuel cells that can be mass-produced at present, this system screens strains and supplies all the sugars with a relatively high content in the original sewage and that can be consumed by both the hydrogen production and power generation links to the microbial anaerobic fermentation for hydrogen production link, and uses substances such as amino acids and organic acids that cannot be metabolized by hydrogen-producing bacteria as substrates for microbial fuel cells, realizing a cascaded and efficient conversion of low-grade chemical energy into high-grade energy. Description of the Drawings

[0034] Figure 1 This is a schematic structural diagram of a pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity combined supply system of the present invention;

[0035] Figure 2 This is a three-dimensional structure diagram of a particle restricted area network; wherein, Figure 2 (a) in this is a top view; Figure 2 (b) in this is a side view - horizontally placed; Figure 2 (c) in this is a side view - vertically placed; Figure 2 (d) in this is a three-dimensional schematic diagram;

[0036] Figure 3 This is a three-dimensional structure diagram of a pulsating liquid flow nozzle; wherein, Figure 3 (a) in this is a top three-dimensional schematic diagram; Figure 3 (b) in this is a bottom three-dimensional schematic diagram;

[0037] Figure 4 This is the anode arrangement; wherein, Figure 4 (a) in this is in-line arrangement; Figure 4 (b) in this is staggered arrangement; Figure 4 (c) in this is spiral;

[0038] Figure 5 This is the pulsation curve of the signal generator; wherein, Figure 5 (a) in this is a sine pulsation curve; Figure 5 (b) in this is a linear pulsation curve; Figure 5 (c) in this is a step pulsation curve.

[0039] Reference Numerals

[0040] 1. Constant temperature liquid storage pool; 2. Anode chamber; 3. Hydrogen production reaction chamber; 4. First peristaltic pump; 5. First electric valve; 6. First flowmeter; 7. Screen; 8. First connecting pipe; 9. First liquid inlet chamber; 10. Methanol synthesis catalytic reactor; 11. First liquid passing port; 12. Second connecting pipe; 13. Second electric valve; 14. Second flowmeter; 15. First gas valve; 16. Vent port; 17. Second liquid inlet chamber; 18. Upper distributor; 19. First electrode; 20. Particle limiting network; 21. Second electrode; 22. Third connecting pipe; 23. Third electric valve; 24. Pulsating return water solenoid valve; 25. Second peristaltic pump; 26. Third peristaltic pump; 27. Pulsating liquid flow main pipe; 28. Stable liquid flow main pipe; 29. Pulsating liquid flow nozzle; 29-1. Pulsating liquid flow outlet; 29-2. Lower distributor; 30. Third flowmeter; 31. Fourth flowmeter; 32. Bubble generator; 33. Anode; 34. Air cathode; 35. Gas connecting pipe; 36. Gas flowmeter; 37. Second vent port; 38. Second gas valve; 39. Gas bag; 40. Gas chromatograph analyzer; 41. Fourth electric valve; 42. Liquid storage tank; 43. Wire; 44. Second liquid passing port; 45. Water quality detector; 46. Super capacitor; 47. Monitoring computer; 48. Pressure swing adsorption hydrogen purifier; 50. Signal generator. Detailed implementation manners

[0041] The technical solutions of the present invention will be further described below with reference to the drawings and embodiments.

[0042] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the field to which the present invention belongs.

[0043] Embodiment 1

[0044] As Figures 1-4As shown in the figure, it is a schematic structural diagram of a pulsating anaerobic microorganism multiphase fluidized bed hydrogen-electricity combined supply system of the present invention, including a constant-temperature liquid storage tank 1. The constant-temperature liquid storage tank 1 is connected to the bottom of the anode chamber 2 through a first connecting pipe 8. A first upper liquid chamber 9 is arranged at the top of the anode chamber 2. A first liquid passing port 11 is arranged on one side of the first upper liquid chamber 9. The first liquid passing port 11 is connected to the second upper liquid chamber 17 at the top of the hydrogen production reaction chamber 3 through a second connecting pipe 12. An upper distributor 18 is arranged in the second upper liquid chamber 17. The bottom of the hydrogen production reaction chamber 3 is connected with a third connecting pipe 22. The other end of the third connecting pipe 22 is provided with a three-way joint. The other two ends of the three-way joint are respectively connected with a diversion pipe and a pulsating liquid flow main pipe 27. The other end of the diversion pipe is connected with a liquid storage tank 42. The other end of the pulsating liquid flow main pipe 27 is connected to the bottom side of the anode chamber 2. The hydrogen production reaction chamber 3 is also connected to the bottom of the anode chamber 2 through a steady liquid flow main pipe 28. One side of the anode chamber 2 is also connected with a super capacitor 46 through a wire 43. The super capacitor 46 is connected with a monitoring computer 47. The wire 43 is also connected with a first electrode 19 and a second electrode 21 in the hydrogen production reaction chamber 3.

[0045] The upper side of the first upper liquid chamber 9 is connected to an air bag 39 through a second ventilation port 37. A second air valve 38 is arranged between the second ventilation port 37 and the air bag 39. The air bag 39 is respectively connected with a gas chromatograph analyzer 40, a pressure swing adsorption hydrogen purifier 48 and a methanol synthesis catalytic reactor 10.

[0046] An air vent 16 is also arranged at the top of the hydrogen production reaction chamber 3. The air vent 16 is connected to a bubble generator 32 in the anode chamber 2 through a gas communication pipe 35.

[0047] A particle limited area network 20 is arranged in the hydrogen production reaction chamber 3. The top diameter of the hydrogen production reaction chamber 3 is larger than the bottom diameter.

[0048] The first connecting pipe 8 is successively provided with a first peristaltic pump 4, a first electric valve 5, a first flowmeter 6 and a third flowmeter 30 in the direction from the constant-temperature liquid storage tank 1 to the anode chamber 2.

[0049] The second connecting pipe 12 is successively provided with a second electric valve 13 and a second flowmeter 14 in the direction from the anode chamber 2 to the hydrogen production reaction chamber 3.

[0050] The gas communication pipe 35 is successively provided with a first air valve 15 and a gas flowmeter 36 in the direction from the hydrogen production reaction chamber 3 to the anode chamber 2.

[0051] The steady liquid flow main pipe 28 is successively provided with a third electric valve 23, a third peristaltic pump 26 and a third flowmeter 30 in the direction from the hydrogen production reaction chamber 3 to the anode chamber 2.

[0052] The pulsating liquid flow main pipe 27 is successively provided with a pulsating return water solenoid valve 24, a second peristaltic pump 25, and a fourth flowmeter 31 in the direction from the hydrogen production reaction chamber 3 to the anode chamber 2. The pulsating return water solenoid valve 24 is also connected to a signal generator 50.

[0053] The signal generator 50 respectively outputs electrical signals to control the opening degree of the pulsating return water solenoid valve 24 according to the 3 pulsating curves as shown in Figure 5 order to generate 3 forms of pulsating liquid flow.

[0054] A number of anodes 33 and air cathodes 34 are arranged in the anode chamber 2. A second liquid inlet 44 is also arranged on one side of the anode chamber 2. The other end of the second liquid inlet 44 is connected to a water quality detector 45. A screen 7 and a pulsating liquid flow nozzle 29 are successively arranged inside the anode chamber 2 below the bubble generator 32.

[0055] Embodiment 2

[0056] A method for using a pulsating anaerobic microorganism multiphase fluidized bed hydrogen-electricity combined supply system includes the following steps:

[0057] Step S1, prepare a microbial film.

[0058] Step S11, respectively inoculate and culture Escherichia coli ( Escherichia coli ), Clostridium ( Clostridium butyricum ), Desulfovibrio ( Desulfovibrio desulfuricans ), and culture at 37°C. Among them, Clostridium ( Clostridium butyricum ), Desulfovibrio ( Desulfovibrio desulfuricans ) need to grow in an anaerobic environment. Therefore, the operation and culture should be carried out in an anaerobic growth chamber.

[0059] The carrier used is modified polypropylene particles. The modification method is as follows: First, polish the polypropylene particles with sandpaper to increase their surface roughness. Then, immerse the particles in a 10 mol / L hydrochloric acid solution for half an hour. Rinse the taken-out particles 5 times in deionized water and dry them in a drying oven at 60°C for 3 h. After the bacteria grow stably, add the prepared modified polypropylene particles to the three kinds of bacterial solutions to initiate the formation of the biofilm, so that the microorganisms attach to the surface of the modified polypropylene particles and grow. After 48 h of culture, a hydrogen-producing microbial film is obtained.

[0060] Step S12, respectively inoculate and culture Shewanella ( Shewanella oneidensis ), Geobacter sulfurreducens ( Geobacter sulfurreducens ), and culture at 37°C. After the bacteria grow stably, add coconut shell activated carbon particles with a diameter of 1 mm to initiate the formation of the biofilm to obtain an electricity-producing biofilm.

[0061] Step S13: After grinding and screening magnetite, prepare nano-Fe3O4 using the ultrasonic precipitation method. Then, mix the sludge obtained from the sewage treatment plant with nano-Fe3O4, and use wastewater and garbage leachate as nutrients for gradient acclimation. Within a temperature range of 25 - 35°C, obtain a microbial film containing nano-Fe3O4.

[0062] Among them, the mixing ratio of wastewater and garbage leachate is 10:1.

[0063] Step S2: Start the first peristaltic pump 4, open the first electric valve 5 and the second electric valve 13, and inject the sewage in the constant temperature liquid storage tank 1 into the anode chamber 2 and the hydrogen production reaction chamber 3 until the sewage accounts for 95% of the volume of the anode chamber 2 and 100% of the volume of the hydrogen production reaction chamber 3, then close the first electric valve 5.

[0064] Add the electrogenic biofilm particles and the microbial film particles containing nano-Fe3O4 into the anode chamber 2; add the hydrogen-producing microbial film particles into the particle confinement network 20 in the hydrogen production reaction chamber 3.

[0065] Start the second peristaltic pump 25 and the third peristaltic pump 26, open the third electric valve 23, the pulsating return water solenoid valve 24, and the signal generator 50, so that the sewage in the hydrogen production reaction chamber 3 and by-products such as acetic acid and butyric acid during the fermentation process enter the anode chamber 2 through the stable liquid flow main pipe 28 and the pulsating liquid flow main pipe 27. Among them, the signal generator 50 controls the opening degree of the pulsating return water solenoid valve 24 according to 3 Figure 5 types of pulsating curves as shown, and outputs electrical signals to generate 3 forms of pulsating liquid flows. The stable liquid flow enters through the lower distributor 29-2 of the pulsating liquid flow nozzle 29, and the pulsating liquid flow sprays out through the pulsating liquid flow outlet 29-1. After the pulsating liquid flow sprays out, it disturbs the flow field in the anode chamber 2.

[0066] Step S3: After the reaction starts, open the first gas valve 15, so that the hydrogen and carbon dioxide generated in the hydrogen production reaction chamber 3 are introduced into the anode chamber 2 through the gas communication pipe 35, and bubbles are generated through the bubble generator 32 at the bottom of the anode chamber 2 to further disturb the flow field.

[0067] Open the second gas valve 38 to collect the mixed gas generated by the reaction into the gas bag 39. First, detect it with a gas chromatograph analyzer 40. After the detection is completed, classify and purify 50% of the gas in the pressure swing adsorption hydrogen purifier 48, and synthesize methanol with 50% in the methanol synthesis catalytic reactor 10.

[0068] Step S4: During the sewage treatment process, 50% of the electric energy generated in the anode chamber 2 is introduced into the hydrogen production reaction chamber 3 to promote the bacterial metabolism process by applying voltage, accelerating the decomposition of organic matter and the production of hydrogen. The other 50% is stored in the supercapacitor 46.

[0069] The monitoring computer 47 records the voltage data every 30 minutes, and the water quality detector 45 detects the water quality every 24 hours.

[0070] When the voltage drops to 100 mV and the COD content in the sewage is less than 100 mg / L, the ammonia nitrogen content is less than 25 mg / L, and the phosphorus element content is less than 3 mg / L, the fourth electric valve 41 is opened to discharge the treated sewage into the liquid storage tank 42. After the sewage in the anode chamber 2 and the hydrogen production reaction chamber 3 is drained, the fourth electric valve 41 is closed.

[0071] New sewage is continuously replenished from the constant temperature liquid storage pool 1 into the hydrogen production reaction chamber 3 and the anode chamber 2 to complete the replacement of sewage in one cycle.

[0072] It should be noted that the content not elaborated in detail in the present invention is the prior art and is well known to those skilled in the art.

[0073] Therefore, the present invention adopts the above-mentioned pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity combined supply system and its usage method, which organically combines the microbial anaerobic fermentation for hydrogen production and the microbial fuel cell technology, realizes complementary advantages, and makes full use of the chemical energy in the sewage in a cascaded manner, so that the conversion efficiency of the low-grade energy of the system is further improved compared with the single technical form. A large number of by-products such as acetic acid and butyric acid are generated during the hydrogen production by fermentation, and these by-products can be utilized in the microbial fuel cell. At the same time, the integrated and enhanced special structure biofilm method fluidized bed is used in the process to replace the traditional suspended microbial reactor, further improving the mass transfer and reaction efficiency of the system.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions of the present invention or make equivalent substitutions, and these modifications or equivalent substitutions cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity cogeneration system, characterized in that: It includes a constant temperature liquid storage tank, which is connected to the bottom of the anode chamber through a first connecting pipe, a first upper liquid chamber is arranged on the top of the anode chamber, a first liquid port is arranged on one side of the first upper liquid chamber, the first liquid port is connected to the second upper liquid chamber on the top of the hydrogen production reaction chamber through a second connecting pipe, an upper distributor is arranged in the second upper liquid chamber, a third connecting pipe is connected to the bottom of the hydrogen production reaction chamber, a three-way joint is arranged on the other end of the third connecting pipe, the other two ends of the three-way joint are respectively connected to a guide pipe and a pulsating liquid flow mother pipe, the other end of the guide pipe is connected to a liquid storage tank, the other end of the pulsating liquid flow mother pipe is connected to the side bottom of the anode chamber, the hydrogen production reaction chamber is also connected to the bottom of the anode chamber through a steady liquid flow mother pipe, one side of the anode chamber is also connected to a supercapacitor through a wire, the supercapacitor is connected to a monitoring computer, and the wire is also connected to the first electrode and the second electrode in the hydrogen production reaction chamber; The upper side of the first upper liquid chamber is connected to an air bag through a second vent, a second air valve is provided between the second vent and the air bag, and the air bag is respectively connected to a gas chromatograph, a pressure swing adsorption hydrogen purifier and a methanol synthesis catalytic reactor; A vent is also provided on the top of the hydrogen production reaction chamber, and the vent is connected to the bubble generator in the anode chamber through a gas connecting pipe, and the bubble generator is located at the bottom of the anode chamber; A particle confinement network is provided in the hydrogen production reaction chamber, and the top diameter of the hydrogen production reaction chamber is larger than the bottom diameter; The flow guide pipe is provided with a fourth electric valve.

2. The pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity cogeneration system according to claim 1, characterized in that: The first connecting pipe is sequentially provided with a first peristaltic pump, a first electric valve, a first flow meter and a third flow meter in the direction from the constant temperature liquid storage tank to the anode chamber.

3. The pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity cogeneration system according to claim 2, characterized in that: The second connecting pipe is provided with a second electric valve and a second flow meter in sequence along the direction from the anode chamber to the hydrogen production reaction chamber.

4. The pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity cogeneration system according to claim 3, characterized in that: The gas connecting pipe is provided with a first gas valve and a gas flow meter in sequence along the direction from the hydrogen production reaction chamber to the anode chamber.

5. The pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity cogeneration system according to claim 4, characterized in that: The steady liquid flow main pipe is provided with a third electric valve, a third peristaltic pump, and a third flow meter in sequence along the direction from the hydrogen production reaction chamber to the anode chamber; The pulsating liquid flow main pipe is sequentially provided with a pulsating water return solenoid valve, a second peristaltic pump, and a fourth flow meter in the direction from the hydrogen production reaction chamber to the anode chamber. The pulsating water return solenoid valve is also connected to the signal generator.

6. The pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity cogeneration system according to claim 5, characterized in that: The anode chamber is provided with a plurality of anodes and an air cathode, a second liquid port is provided on one side of the anode chamber, the other end of the second liquid port is connected to a water quality detector, and a gauze screen and a pulsating liquid flow nozzle are sequentially provided inside the anode chamber at the lower side of the bubble generator.

7. A method for using the pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity cogeneration system as claimed in claim 6, characterized in that: The following steps are involved: Step S1, preparing a microbial membrane; Step S11, inoculating and culturing Escherichia coli, Clostridium, and Desulfovibrio at 37° C., and adding the prepared modified polypropylene particles to the three bacterial solutions after the bacterial growth is stable, to start the formation of biofilm, so that the microorganisms adhere to the surface of the modified polypropylene particles and grow, and obtain a hydrogen-producing microbial film after 48 hours of cultivation; Step S12, inoculating and culturing Shewanella and Geobacillus sulfurreducens at 37° C., and after the bacterial growth is stable, adding coconut shell activated carbon particles with a diameter of 1 mm to start the formation of biofilm to obtain an electricity-generating biofilm; Step S13, grinding and screening the magnetite, using ultrasonic precipitation method to prepare nano Fe3O4, then mixing the sludge obtained from the sewage plant with the nano Fe3O4, using wastewater and garbage leachate as nutrients for gradient domestication, and obtaining a microbial film containing nano Fe3O4; Step S2, start the first peristaltic pump, open the first electric valve and the second electric valve, inject the sewage in the constant temperature liquid storage tank into the anode chamber and the hydrogen production reaction chamber until the sewage occupies 95% of the volume of the anode chamber and 100% of the volume of the hydrogen production reaction chamber, and close the first electric valve; Adding electricity-producing biofilm particles and microbial membrane particles containing nano-Fe3O4 into the anode chamber, and adding hydrogen-producing microbial membrane particles into the particle confinement network in the hydrogen-producing reaction chamber; Start the second peristaltic pump and the third peristaltic pump, open the third electric valve, the pulsating return water solenoid valve, and the signal generator, so that the sewage in the hydrogen production reaction chamber and the by-products in the fermentation process enter the anode chamber through the steady liquid flow mother pipe and the pulsating liquid flow mother pipe, wherein the steady liquid flow enters through the lower distributor of the pulsating liquid flow nozzle, and the pulsating liquid flow is ejected through the pulsating liquid flow outlet, and the pulsating liquid flow generates disturbances to the flow field in the anode chamber after being ejected; Step S3, after the reaction starts, the first gas valve is opened to allow the hydrogen and carbon dioxide generated in the hydrogen production reaction chamber to be introduced into the anode chamber through the gas connecting pipe, and bubbles are generated by the bubble generator at the bottom of the anode chamber to further disturb the flow field; Open the second gas valve to allow the mixed gas generated by the reaction to enter the gas bag for collection, and first use a gas chromatograph to detect it. After the detection is completed, 50% of the gas is classified and purified in a pressure swing adsorption hydrogen purifier, and the other 50% is synthesized into methanol in a methanol synthesis catalytic reactor; Step S4: During the sewage treatment process, 50% of the electrical energy generated in the anode chamber is introduced into the hydrogen production reaction chamber to promote bacterial metabolism by applying voltage, accelerate the decomposition of organic matter and the production of hydrogen, and the other 50% is stored in the supercapacitor; Use a monitoring computer to record voltage data every 30 minutes, and use a water quality detector to test water quality every 24 hours; When the voltage drops to 100mV and the COD content in the sewage is less than 100mg / L, the ammonia nitrogen content is less than 25mg / L and the phosphorus content is less than 3mg / L, the fourth electric valve is opened to discharge the treated sewage into the liquid storage tank. After the sewage in the anode chamber and the hydrogen production reaction chamber is completely discharged, the fourth electric valve is closed; New sewage continues to be added from the constant temperature liquid storage tank to the hydrogen production reaction chamber and the anode chamber to complete a cycle of sewage replacement.

8. The method for using the pulsating anaerobic microbial multiphase fluidized bed hydrogen-electricity cogeneration system according to claim 7, characterized in that: The preparation method of modified polypropylene particles is as follows: first, the polypropylene particles are polished with sandpaper to increase the roughness of the surface, the polished particles are immersed in a 10 mol / L hydrochloric acid solution for half an hour, the taken out particles are rinsed in deionized water for 5 times, and dried in a drying oven at 60°C for 3 hours to obtain modified polypropylene particles.

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