A kitchen garbage high-solid-content bio-ethanol fermentation carbon dioxide capture and utilization and ethanol distillation integrated device

Abstract

The utility model relates to the device of anaerobic production biological ethanol and obtaining high purity fuel ethanol of urban kitchen garbage with solid content rate more than or equal to 30%, and it relates to the integrated device of carbon dioxide capture and utilization and ethanol distillation of kitchen garbage high solid content biological ethanol fermentation, the utility model wants to solve the technical problem of the existing kitchen garbage high solid content biological ethanol production device existing carbon dioxide emission, heat transfer and mass transfer uneven, biological ethanol production efficiency low, the device of the utility model includes fermentation system, circulating water bath system, gas compressor, condenser, steam generator and control cabinet, wherein the gas outlet of fermentation system shell is connected with the gas inlet through the gas compressor, and the byproduct carbon dioxide of fermentation process realizes pneumatic stirring and efficient conversion of kitchen garbage, the proportion of ethanol yield of the device accounts for the theoretical yield and reaches 85.6%~95.2%, and the biological ethanol yield is high, the ethanol distillation efficiency is high, can be used in the field of urban kitchen garbage biological ethanol fermentation.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen waste treatment, specifically relating to an integrated device and method for capturing and utilizing carbon dioxide and distilling ethanol from high-solids kitchen waste. Background Technology

[0002] Kitchen waste refers to the waste generated by households, the catering industry, and canteens during food processing and dining. Kitchen waste is produced in large quantities, has a complex composition, is easily perishable and produces foul-smelling gases, but it is characterized by high organic matter content and good biodegradability, and has great potential for resource utilization.

[0003] For a long time, the treatment of food waste has focused on landfill, composting, incineration, anaerobic digestion, and anaerobic fermentation. Among these, anaerobic bioethanol fermentation of food waste can produce bioethanol by processing food waste. After distillation, it produces high-purity ethanol for use as fuel, and the fermentation residue can be used as high-protein feed for broiler chickens. This can achieve the resource conversion and full-scale disposal of food waste, while reducing dependence on fossil fuels and promoting energy independence. However, according to relevant research, the solids content of food waste can reach more than 25%, and some food waste even has a solids content of more than 30%, which is higher than that of conventional bioethanol fermentation systems. High Solid Bioethanol Fermentation (HSBF) technology has become an optimized solution for food waste treatment due to its advantages such as low material moisture content requirements, energy saving, and low cost. HSBF is generally defined as a bioethanol fermentation technology with a feed solids content of ≥15%. The increased solids content makes the heating and stirring requirements inside the reaction system different from those of common bioethanol fermentation reactors. When using a conventional bioethanol fermentation reactor to ferment high-solids kitchen waste with a solids content of more than 30%, the carbon dioxide produced during fermentation is emitted, the system is not mixed evenly, and the fermentation efficiency is low. Utility Model Content

[0004] The present invention aims to solve the technical problems of insufficient utilization of carbon dioxide, uneven system mixing, and low fermentation efficiency when using conventional bioethanol fermentation reactors to ferment high-solids-content kitchen waste. In response, it provides an integrated device for carbon dioxide capture and utilization and ethanol distillation during bioethanol fermentation of kitchen waste with high solids content.

[0005] The integrated device for high-solids bioethanol fermentation, carbon dioxide capture and utilization, and ethanol distillation of kitchen waste includes a fermentation system 1, a circulating water bath system 2, a gas compressor 3, a condenser 4, a steam generator 5, and a control cabinet 6.

[0006] Fermentation system 1 includes an outer shell 1-1, a fermentation chamber 1-2, and an annular support partition plate 1-3; the annular support partition plate 1-3 is fixed to the lower end inside the outer shell 1-1, and the fermentation chamber 1-2 is fixedly connected to the annular support partition plate 1-3; the area between the outer shell 1-1 and the fermentation chamber 1-2 above the annular support partition plate 1-3 is a water bath jacket area 1-4; a water bath inlet 1-5 is provided below the side wall of the outer shell 1-1, and a water bath outlet 1-6 is provided below the side wall of the outer shell 1-1; a circulating water bath system 2 and... Water bath inlet 1-5 and water bath outlet 1-6 are connected; the area below the annular support partition plate 1-3 is the gas zone 1-7; an air inlet 1-8 is provided at the bottom of the outer shell 1-1; an air outlet 1-9 is provided at the top of the outer shell 1-1, and a three-way valve 1-10 is provided above the air outlet 1-9. One branch of the three-way valve 1-10 is connected to the air inlet 1-8 through the first air valve 1-11, the second air valve 1-12, and the gas compressor 3; the other branch of the three-way valve 1-10 is connected to the condenser 4.

[0007] Steam generator 5 is connected to the pipeline between first air valve 1-11 and second air valve 1-12 via third air valve 1-13;

[0008] A through hole is provided on the top plate 1-2-3 of the fermentation chamber 1-2, and a funnel-shaped vent pipe 1-2-1 is provided on the through hole. The funnel-shaped vent pipe 1-2-1 is made of rubber.

[0009] A through hole is provided on the bottom plate 1-2-4 of the fermentation chamber 1-2, and a one-way air valve 1-2-2 is installed on the through hole;

[0010] Control cabinet 6 includes an online monitoring system and controllers. The online monitoring system consists of a temperature monitoring system, a pressure monitoring system, and a level gauge monitoring system. The temperature, pressure, and level data collected by the online monitoring system are fed back and displayed on control cabinet 6, and controlled by their respective controllers.

[0011] Furthermore, the trumpet-shaped vent pipe 1-2-1 is made of rubber. The trumpet-shaped vent pipe is advantageous for distillation during the ethanol distillation process.

[0012] Furthermore, the one-way air valve 1-2-2 is composed of a cylindrical cover 1-2-2-1, a support rod 1-2-2-2, a rubber pad 1-2-2-3, and a cylindrical air outlet 1-2-2-4. The support rod 1-2-2-2 passes through the air outlet 1-2-2-4 and is connected to the center of the cylindrical cover 1-2-2-1 and the rubber pad 1-2-2-3 respectively.

[0013] Furthermore, the top of the outer shell 1-1 is provided with three stacked trays 1-14. This is used to more effectively separate ethanol and other byproducts during the distillation process.

[0014] Furthermore, the online monitoring system of control cabinet 6 also includes pH and redox potential probes for detecting the pH and redox potential of the reactor, with the redox potential used to detect the anaerobic conditions within the reactor.

[0015] Furthermore, the online detection system of control cabinet 6 also includes a glucose concentration detector, which is used to detect the utilization of glucose by yeast during the fermentation process and to determine the fermentation endpoint.

[0016] Furthermore, the online detection system of control cabinet 6 also includes an ethanol concentration detector, which is used to detect the ethanol production of yeast during the fermentation process and to determine the fermentation endpoint.

[0017] The method for fermenting and distilling high-solids-content bioethanol from kitchen waste using the aforementioned integrated device for carbon dioxide capture and utilization and ethanol distillation is carried out according to the following steps:

[0018] I. Substrate Pretreatment:

[0019] After collection, large pieces of impurities and waste are removed from the kitchen waste. The kitchen waste is then mixed evenly, spread out, and dried. The dried material is crushed to a particle size of 1.5~2.5mm to obtain kitchen waste powder. The kitchen waste powder is then prepared into a thick slurry with a solids content of 25%~30%. In this step, drying pretreatment has been proven to be a superior pretreatment method for the enzymatic hydrolysis of kitchen waste, as it can destroy the substrate structure and accelerate the enzymatic hydrolysis rate. The collected kitchen waste, after pretreatment, can achieve efficient fermentation of high-solids bioethanol.

[0020] II. Saccharification of kitchen waste:

[0021] α-Amylase was added to the concentrated slurry at a concentration of 105±10 U / g of kitchen waste, and enzymatic hydrolysis was carried out for 9.6±0.1 h at a temperature of 60±1℃ and a pH of 6.5±0.1. Then, saccharifying enzyme was added at a concentration of 60±5 U / g of kitchen waste, and enzymatic hydrolysis was carried out for 14.4±0.1 h at a temperature of 55±1℃ and a pH of 4.5±0.1 to obtain a homogenate. The large sugar molecules in the substrate were converted into small monosaccharides by α-amylase and saccharifying enzyme, which were then utilized by the brewer's yeast. Under the conditions of this step, the actual sugar yield during the saccharification process of the kitchen waste was greater than 0.80% of the theoretical sugar yield.

[0022] III. Bioethanol fermentation:

[0023] a. Activation of brewing yeast: High-temperature resistant and highly active dry yeast is used, with a dosage of 1% of the dry weight of kitchen waste. It is mixed evenly with 2% glucose water at a mass percentage concentration of 10 times the weight of yeast and activated at 37℃ for 30 minutes to obtain activated brewing yeast liquid.

[0024] b. Pour the homogenate into the fermentation chamber 1 of the integrated device for high-solids bioethanol fermentation, carbon dioxide capture and utilization, and ethanol distillation of kitchen waste, and mix it evenly with the activated brewing yeast liquid. The filling volume is 80% of the fermentation chamber volume. Start the fermentation mode and begin fermentation until the actual bioethanol yield is greater than 0.80% of the theoretical bioethanol yield. At this time, the bioethanol fermentation is complete. The fermentation mode is as follows: the top gas outlet 1-9 is closed, and water at a temperature of 36~37℃ in the circulating water bath system 2 is added to the water bath jacket area 1-4 through the water bath inlet 1-5, and then returned to the circulating water bath system 2 through the water bath outlet 1-6. As the fermentation process proceeds, when the pressure gauge shows a reading, the gas outlet 1-9 is opened. The carbon dioxide gas produced in the anaerobic fermentation process flows out of the fermentation system 1 through the gas outlet 1-9, enters the gas compressor 3 through the three-way valve 1-10, the first gas valve 1-11, and the second gas valve 1-12, and is compressed before returning to the fermentation system 1 through the gas inlet 1-8.

[0025] IV. Distillation of bioethanol:

[0026] After the bioethanol fermentation process is completed, the process switches to distillation mode, which uses a dual heating method for distillation. The water bath temperature is raised to 80°C, and the steam generated by the steam generator 5 is pressurized by the gas compressor 3 and enters the mixture in the fermentation chamber through the air inlet 1-8 at the bottom of the outer shell 1-1 and the one-way valve 1-2-2 of the fermentation chamber. The fermented bioethanol is distilled off and enters the shell through the trumpet-shaped air outlet 1-2-1 at the top of the fermentation chamber. It then enters the condenser 4 through the air outlet 1-9 at the top of the shell to form liquid fuel ethanol. The distillation process is considered complete when the amount of bioethanol distilled out is greater than 80% of the amount of fermented ethanol.

[0027] Furthermore, in step three (b), before fermentation begins, fermentation chamber 1 is purged with carbon dioxide gas to ensure that no oxygen is present inside.

[0028] This invention relates to an integrated device for carbon dioxide capture and utilization and ethanol distillation in the fermentation of high-solids-content bioethanol from kitchen waste. It employs carbon dioxide pneumatic stirring to mix the fermentation process, improving upon traditional bioethanol fermentation methods which suffer from ineffective utilization of carbon dioxide, incomplete stirring, and cumbersome fermentation and distillation steps. Simultaneously, it increases the concentration of carbon dioxide in the system (solid-liquid-gas three phases), contributing to a higher ethanol concentration in the final product. This results in a more efficient high-solids-content bioethanol fermentation process, higher final product purity, and an ethanol yield that accounts for 85.6% to 95.2% of the theoretical yield. Furthermore, the pretreatment and saccharification methods provided in this invention help increase the efficiency of high-solids-content enzymatic hydrolysis of kitchen waste and its degradation rate. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an integrated device for high-solids-content bioethanol fermentation, carbon dioxide capture and utilization, and ethanol distillation of kitchen waste.

[0030] Figure 2 This is a schematic diagram of the structure of fermentation system 1;

[0031] Figure 3 This is a structural diagram of the top plate 1-2-3 of the fermentation chamber;

[0032] Figure 4 This is a schematic diagram of the funnel-shaped vent pipe 1-2-1 installed on the top plate of the fermentation chamber. a is a three-dimensional schematic diagram, and b is a longitudinal cross-sectional schematic diagram.

[0033] Figure 5 This is a structural diagram of the fermentation chamber bottom plate 1-2-4;

[0034] Figure 6 The diagram shows the structure of the one-way air valve 1-2-2 installed on the bottom plate of the fermentation chamber. a is a three-dimensional view and b is a longitudinal cross-sectional view.

[0035] In the diagram: 1 represents the fermentation system; 1-1 is the outer shell; 1-2 is the fermentation chamber; 1-2-1 is the trumpet-shaped gas outlet pipe; 1-2-2 is the one-way gas valve; 1-2-2-1 is the cylindrical lid; 1-2-2-2 is the support rod; 1-2-2-3 is the rubber pad; 1-2-2-4 is the cylindrical gas outlet cylinder; 1-2-3 is the top plate; 1-2-4 is the bottom plate; 1-2-5 is the level gauge; 1-2-6 is the sampling port; 1-3 is the annular support. The partition plate is as follows: 1-4 is the water bath jacket area, 1-5 is the water bath inlet, 1-6 is the water bath outlet, 1-7 is the gas area, 1-8 is the air inlet, 1-9 is the air outlet, 1-10 is the three-way valve, 1-11 is the first air valve, 1-12 is the second air valve, 1-13 is the third air valve, 1-14 is the tower plate, and 1-15 is the probe hole; 2 is the circulating water bath system, 3 is the gas compressor, 4 is the condenser, 5 is the steam generator, and 6 is the control cabinet. Detailed Implementation

[0036] The beneficial effects of this utility model are verified using the following embodiments:

[0037] Example 1: The integrated device for high-solids bioethanol fermentation, carbon dioxide capture and utilization and ethanol distillation of kitchen waste in this example consists of a fermentation system 1, a circulating water bath system 2, a gas compressor 3, a condenser 4, a steam generator 5 and a control cabinet 6.

[0038] The fermentation system 1 consists of an outer shell 1-1, a fermentation chamber 1-2, and an annular support partition plate 1-3;

[0039] The outer shell 1-1 is constructed of plexiglass columns with an inner diameter of 900 mm, a height of 1800 mm, a height-to-diameter ratio of 2:1, and a wall thickness of 2 mm. An annular support partition plate 1-3 is fixed to the lower end of the outer shell 1-1, and the fermentation chamber 1-2 is fixedly connected to the annular support partition plate 1-3. Above the annular support partition plate 1-3, between the outer shell 1-1 and the fermentation chamber 1-2, is a water bath jacket area 1-4. A water bath inlet 1-5 and a water bath outlet 1-6 are located below the side wall of the outer shell 1-1. A circulating water bath system 2 is connected to the water bath inlet 1-5 and the water bath outlet 1-6. Below the annular support partition plate 1-3 is a gas zone 1-7. Two air inlets 1-8 with an inner diameter of 60 mm are located at the bottom of the outer shell 1-1. An air inlet 1-8 with an inner diameter of 100 mm is located at the top of the outer shell 1-1. The outlet 1-9 has a diameter of mm. A three-way valve 1-10 is installed on the upper part of the outlet 1-9. One branch of the three-way valve 1-10 is connected to the inlet 1-8 through the first gas valve 1-11, the second gas valve 1-12, and the gas compressor 3. The other branch of the three-way valve 1-10 is connected to the condenser 4. The steam generator 5 is connected to the pipeline between the first gas valve 1-11 and the second gas valve 1-12 through the third gas valve 1-13.

[0040] Fermentation chamber 1-2 is made of plexiglass columns with an inner diameter of 830 mm and a height of 1200 mm. The top plate 1-2-3 of fermentation chamber 1-2 has 205 through holes, and each through hole is equipped with a funnel-shaped vent pipe 1-2-1. The funnel-shaped vent pipe 1-2-1 is made of rubber with a thickness of 1 mm. The diameter of the top funnel opening is 20 mm, and the diameter of the bottom round hole is 10 mm and the height is 10 mm.

[0041] The fermentation chamber 1-2 has 205 through holes on its bottom plate 1-2-4, and a one-way valve 1-2-2 is installed in each through hole. The one-way valve 1-2-2 consists of a cylindrical cover 1-2-2-1, a support rod 1-2-2-2, a rubber pad 1-2-2-3, and a cylindrical vent 1-2-2-4. The support rod 1-2-2-2 passes through the vent 1-2-2-4 and connects to the center of both the cylindrical cover 1-2-2-1 and the rubber pad 1-2-2-3. The cylindrical cover 1-2-2-1 has an inner diameter of 18 mm, a wall thickness of 1 mm, and a height of 10 mm, and is made of plexiglass. The rubber pad 1-2-2-3 has a diameter of 20 mm and a thickness of 1 mm. The support rod 1-2-2-2 is a solid plexiglass cylinder with a diameter of 1 mm. The cylindrical vent 1-2-2-4 has an inner diameter of 10 mm and a wall thickness of 1 mm. mm, made of plexiglass;

[0042] A level gauge 1-2-5 is installed on the side wall of fermentation chamber 1-2. A thermometer, pH meter, redox potential probe, glucose concentration detector, and ethanol concentration detector are installed in the middle of fermentation chamber 1-2. A pressure gauge is installed on the top of fermentation chamber 1-2.

[0043] Control cabinet 6 consists of an online monitoring system and controllers. The online monitoring system includes a temperature monitoring system, a pressure monitoring system, a level gauge monitoring system, a pH monitoring system, a redox potential monitoring system, a glucose concentration monitoring system, and an ethanol concentration monitoring system. The online monitoring system collects data on temperature, pressure, level, pH, redox potential, glucose concentration, and ethanol concentration, which are then fed back and displayed on control cabinet 6 and controlled by their respective controllers.

[0044] The method for fermenting and distilling high-solids-content bioethanol from kitchen waste using the aforementioned integrated device for carbon dioxide capture and utilization and ethanol distillation is carried out according to the following steps:

[0045] I. Substrate Pretreatment:

[0046] After collection, large pieces of impurities and waste are removed from the kitchen waste. The kitchen waste is then mixed evenly and spread out to a thickness of 7-8 mm, and then dried at 105℃ for 3 hours. The dried material is then crushed to a particle size of less than 2 mm to obtain kitchen waste powder. The kitchen waste powder is then prepared into a thick slurry with a solids content of 30%. In this step, drying pretreatment has been proven to be a superior pretreatment method for enzymatic hydrolysis of kitchen waste, as it can destroy the substrate structure and accelerate the enzymatic hydrolysis rate. The collected kitchen waste, after pretreatment, can achieve efficient fermentation of high-solids bioethanol.

[0047] II. Saccharification of kitchen waste:

[0048] First, α-amylase was added to the concentrated slurry at a concentration of 105 U / g of kitchen waste, and enzymatic hydrolysis was carried out for 9.6 h at 60℃ and pH 6.5. Then, saccharifying enzyme was added at a concentration of 60 U / g of kitchen waste, and enzymatic hydrolysis was carried out for 14.4 h at 55℃ and pH 4.5 to obtain a homogenate. The large sugar molecules in the substrate were converted into small monosaccharides by α-amylase and saccharifying enzyme, which were then utilized by the brewer's yeast.

[0049] III. Bioethanol fermentation:

[0050] a. Activation of brewing yeast: High-temperature resistant and highly active dry yeast is used, with a dosage of 1% of the dry weight of kitchen waste. It is mixed evenly with 2% glucose water at a mass percentage concentration of 10 times the weight of yeast and activated at 37℃ for 30 minutes to obtain activated brewing yeast liquid.

[0051] b. Pour the homogenate into the fermentation chamber 1 of the integrated device for high-solids bioethanol fermentation of kitchen waste, carbon dioxide capture and utilization, and ethanol distillation, and mix it evenly with the activated brewing yeast liquid. The filling volume is 80% of the fermentation chamber volume. Start the fermentation mode and ferment for 48 hours to complete the fermentation. The fermentation mode is as follows: the top gas outlet 1-9 is closed, and water at a temperature of 36~37℃ in the circulating water bath system 2 is added to the water bath jacket area 1-4 through the water bath inlet 1-5, and then returned to the circulating water bath system 2 through the water bath outlet 1-6. As the fermentation process proceeds, when the pressure gauge shows a reading, the gas outlet 1-9 is opened. The carbon dioxide gas generated in the anaerobic fermentation process flows out of the fermentation system 1 through the gas outlet 1-9, enters the gas compressor 3 through the three-way valve 1-10, the first gas valve 1-11, and the second gas valve 1-12, and is compressed before returning to the fermentation system 1 through the gas inlet 1-8.

[0052] IV. Distillation of bioethanol:

[0053] After the bioethanol fermentation process is completed, the process is switched to distillation mode, which uses a double heating method for distillation. The water bath temperature is increased to 80°C while saturated steam is introduced from two air inlets at the bottom of the reactor. The steam enters the mixture through the bottom pores, distills the bioethanol, and enters the shell through the pores at the top of the fermentation chamber. It then enters the condenser through the air outlet at the top of the shell to form liquid fuel ethanol.

[0054] Table 1 summarizes the experimental results of the food waste slurry in this embodiment during enzymatic hydrolysis, bioethanol fermentation, and distillation:

[0055] Table 1. Experimental results of food waste slurry during enzymatic hydrolysis, bioethanol fermentation, and distillation.

[0056]

[0057] Table 1 shows that the integrated device for high-solids bioethanol fermentation, carbon dioxide capture and utilization, and ethanol distillation of kitchen waste exhibits good enzymatic hydrolysis performance under enzymatic conditions. The reducing sugar yield reaches 0.7 g / g of kitchen waste, and the glucose yield exceeds 0.5 g / g of kitchen waste. The enzymatic hydrolysis process is efficient, with the actual sugar yield exceeding 80% of the theoretical sugar yield, meeting the required enzymatic hydrolysis effect. During bioethanol fermentation, the ethanol yield reaches 85.6% of the theoretical yield, while the concentrations of the two main byproducts, acetic acid and lactic acid, are low, and the carbon dioxide yield reaches 0.369 m³ / g. 3 The system can smoothly complete the pneumatic stirring process at a rate of / h, resulting in good fermentation effects. During distillation, the distilled mixture reaches an alcohol content of 63°, with an ethanol distillation yield of approximately 80%. Overall, the integrated device for high-solids bioethanol fermentation of kitchen waste, combining carbon dioxide capture and utilization with ethanol distillation, demonstrates better bioethanol fermentation effects than conventional bioethanol fermentation reactors, exhibiting higher distillation efficiency and significantly reducing subsequent processing steps.

[0058] Example 2: The integrated device for high-solids bioethanol fermentation, carbon dioxide capture and utilization, and ethanol distillation of kitchen waste in this example differs from Example 1 in that: the top of the outer shell 1-1 is provided with 12 three-layer stacked tower plates 1-14, which are used to more effectively separate ethanol and other by-products during the distillation process; the other structures are the same as in Example 1.

[0059] The method for fermenting and distilling high-solids bioethanol from kitchen waste using the integrated device for carbon dioxide capture and utilization and ethanol distillation of high-solids bioethanol from kitchen waste in Example 2 differs from the method in Example 1 in that 1% of the dry weight of kitchen waste saponin is added during the enzymatic hydrolysis process to improve the efficiency of enzymatic hydrolysis and bioethanol fermentation. Before the fermentation begins, carbon dioxide is filled into the device to make the system anaerobic. Otherwise, it is the same as in Example 1.

[0060] Table 2 summarizes the experimental results of the kitchen waste slurry in this embodiment during enzymatic hydrolysis, bioethanol fermentation, and distillation.

[0061] Table 2. Experimental results of kitchen waste slurry from Example 2 in enzymatic hydrolysis, bioethanol fermentation, and distillation.

[0062]

[0063] Table 2 shows that the integrated device for high-solids bioethanol fermentation, carbon dioxide capture and utilization, and ethanol distillation of kitchen waste exhibits better enzymatic hydrolysis performance under optimized conditions. Glucose yield increased by 0.03 g / g of kitchen waste, and the actual sugar yield reached 85% of the theoretical sugar yield, meeting the requirements for enzymatic hydrolysis. The solid degradation rate also increased by 2% compared to before optimization, demonstrating good enzymatic hydrolysis performance. Under optimized methods and device operating conditions, ethanol concentration increased by 18.6%, and the ethanol yield reached over 95% of the theoretical yield. Acetic acid concentration decreased significantly, and carbon dioxide yield reached 0.437 m³ / g. 3 The increased stirring rate ( / h) during bioethanol fermentation resulted in better fermentation performance. During distillation, the distillate reached an alcohol content of approximately 70°, with an ethanol yield of 85%. Compared to conventional bioethanol fermentation reactors, the ethanol concentration, yield, and distillation efficiency were significantly improved. While the enzymatic hydrolysis effect was similar, the byproduct concentration was significantly reduced, indicating a further improvement in the bioethanol production performance of the device.

Claims

1. An integrated device for high-solids-content bioethanol fermentation, carbon dioxide capture and utilization, and ethanol distillation of kitchen waste, characterized in that, The device includes a fermentation system (1), a circulating water bath system (2), a gas compressor (3), a condenser (4), a steam generator (5), and a control cabinet (6); The fermentation system (1) includes an outer shell (1-1), a fermentation chamber (1-2), and an annular support partition plate (1-3); the annular support partition plate (1-3) is fixed to the lower end inside the outer shell (1-1), and the fermentation chamber (1-2) is fixedly connected to the annular support partition plate (1-3); the area between the outer shell (1-1) and the fermentation chamber (1-2) above the annular support partition plate (1-3) is a water bath jacket area (1-4); a water bath inlet (1-5) is provided below the side wall of the outer shell (1-1), and a water bath outlet (1-6) is provided below the side wall of the outer shell (1-1); the circulating water bath system (2) and The water bath inlet (1-5) and water bath outlet (1-6) are connected; the gas zone (1-7) is below the annular support partition plate (1-3); an air inlet (1-8) is provided at the bottom of the outer shell (1-1); an air outlet (1-9) is provided at the top of the outer shell (1-1), and a three-way valve (1-10) is provided above the air outlet (1-9). One branch of the three-way valve (1-10) is connected to the air inlet (1-8) through the first air valve (1-11), the second air valve (1-12), and the gas compressor (3); the other branch of the three-way valve (1-10) is connected to the condenser (4). The steam generator (5) is connected to the pipeline between the first gas valve (1-11) and the second gas valve (1-12) via the third gas valve (1-13); A through hole is provided on the top plate (1-2-3) of the fermentation chamber (1-2), and a trumpet-shaped air outlet pipe (1-2-1) is provided on the through hole. The trumpet-shaped air outlet pipe (1-2-1) is made of rubber. A through hole is provided on the bottom plate (1-2-4) of the fermentation chamber (1-2), and a one-way air valve (1-2-2) is installed on the through hole; The control cabinet (6) includes an online detection system and a controller. The online detection system is a temperature monitoring system, a pressure monitoring system, and a level gauge monitoring system. The temperature, pressure, and level data collected by the online detection system are fed back and displayed on the control cabinet (6), and controlled by their respective controllers.

2. The integrated device for high-solids bioethanol fermentation, carbon dioxide capture and utilization, and ethanol distillation of kitchen waste according to claim 1, characterized in that, The horn-shaped vent pipe (1-2-1) is made of rubber.

3. The integrated device for carbon dioxide capture and utilization and ethanol distillation of high-solids bioethanol fermentation of kitchen waste according to claim 1 or 2, characterized in that, The one-way air valve (1-2-2) consists of a cylindrical cover (1-2-2-1), a support rod (1-2-2-2), a rubber pad (1-2-2-3), and a cylindrical air outlet (1-2-2-4). The support rod (1-2-2-2) passes through the air outlet (1-2-2-4) and connects to the center of the cylindrical cover (1-2-2-1) and the rubber pad (1-2-2-3) respectively.

4. The integrated device for carbon dioxide capture and utilization and ethanol distillation of high-solids bioethanol fermentation of kitchen waste according to claim 1 or 2, characterized in that, The top of the outer shell (1-1) is provided with three stacked trays (1-14).

5. An integrated device for carbon dioxide capture and utilization and ethanol distillation in the fermentation of high-solids bioethanol from kitchen waste according to claim 1 or 2, characterized in that, The online detection system of the control cabinet (6) also includes pH and redox potential probes.

6. The integrated device for high-solids bioethanol fermentation, carbon dioxide capture and utilization, and ethanol distillation of kitchen waste according to claim 1 or 2, characterized in that, The online detection system of the control cabinet (6) also includes a glucose concentration detector.

7. The integrated device for carbon dioxide capture and utilization and ethanol distillation of high-solids bioethanol fermentation of kitchen waste according to claim 1 or 2, characterized in that, The online detection system of the control cabinet (6) also includes an ethanol concentration detector.

Images