CN117757600B - Equipment and method for preparing carbon source from kitchen waste with high efficiency fermentation - Google Patents
Equipment and method for preparing carbon source from kitchen waste with high efficiency fermentation Download PDFInfo
- Publication number
- CN117757600B CN117757600B CN202311585638.1A CN202311585638A CN117757600B CN 117757600 B CN117757600 B CN 117757600B CN 202311585638 A CN202311585638 A CN 202311585638A CN 117757600 B CN117757600 B CN 117757600B
- Authority
- CN
- China
- Prior art keywords
- gas
- kitchen waste
- phase separator
- fermentation
- stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010806 kitchen waste Substances 0.000 title claims abstract description 93
- 238000000855 fermentation Methods 0.000 title claims abstract description 74
- 230000004151 fermentation Effects 0.000 title claims abstract description 74
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 8
- 239000007788 liquid Substances 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000000926 separation method Methods 0.000 claims abstract description 41
- 238000003756 stirring Methods 0.000 claims abstract description 31
- 238000002360 preparation method Methods 0.000 claims abstract description 25
- 238000009826 distribution Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 239000006228 supernatant Substances 0.000 claims description 20
- 239000004519 grease Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 9
- 238000009792 diffusion process Methods 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 2
- 235000014113 dietary fatty acids Nutrition 0.000 abstract description 6
- 229930195729 fatty acid Natural products 0.000 abstract description 6
- 239000000194 fatty acid Substances 0.000 abstract description 6
- 150000004665 fatty acids Chemical class 0.000 abstract description 6
- 239000010865 sewage Substances 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 47
- 239000010813 municipal solid waste Substances 0.000 description 9
- 238000004064 recycling Methods 0.000 description 9
- 238000001556 precipitation Methods 0.000 description 5
- 238000010992 reflux Methods 0.000 description 5
- 241000238631 Hexapoda Species 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000009395 breeding Methods 0.000 description 2
- YKPUWZUDDOIDPM-SOFGYWHQSA-N capsaicin Chemical compound COC1=CC(CNC(=O)CCCC\C=C\C(C)C)=CC=C1O YKPUWZUDDOIDPM-SOFGYWHQSA-N 0.000 description 2
- 238000009264 composting Methods 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 240000004160 Capsicum annuum Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 229960002504 capsaicin Drugs 0.000 description 1
- 235000017663 capsaicin Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000006694 eating habits Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012502 risk assessment Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses kitchen waste efficient fermentation carbon source preparation equipment which comprises a kitchen waste pretreatment device for heating and oil-water separation of kitchen waste which is crushed in advance, wherein the kitchen waste pretreatment device is communicated with a fermentation reactor through a water distribution pipe, the fermentation reactor is provided with a gas stirring device and a three-phase separator from bottom to top, the top of the fermentation reactor is communicated with a gas-liquid separation tower, and the three-phase separator is communicated with the gas-liquid separation tower. The invention also discloses a preparation method of the kitchen waste high-efficiency fermentation carbon source, which can hydrolyze and acidify organic matters in the kitchen waste to form fermentation liquor rich in volatile fatty acid, and the fermentation liquor is used as an external carbon source of a very effective sewage biological treatment unit, is applied to the field of sewage treatment, and realizes industrial application.
Description
Technical Field
The invention belongs to the technical field of garbage recycling treatment methods, relates to kitchen waste high-efficiency fermentation carbon source preparation equipment, and further relates to a preparation method of the kitchen waste high-efficiency fermentation carbon source preparation equipment.
Background
Kitchen garbage has the characteristics of high water content, high organic matter, high salt content, high oil content, easy decay and the like, and if the kitchen garbage is not treated timely, malodor is easy to generate, pathogen microorganisms can be bred, and the problem of environmental pollution is caused. The kitchen waste in China has lower C/N (10-20) due to higher N content, and if the kitchen waste is treated by adopting a biological method, the kitchen waste and other high C/N organic wastes are required to be treated cooperatively. In addition, the unique and rich eating habits lead the kitchen waste in China to have the characteristics of high lipid (17.02% -31.80%), high salinity (0.50% -5.00%) and high chilli (0% -2.50%). Therefore, in the resource treatment process of the Chinese kitchen garbage, the influence of high oil, high salt and high capsaicin should be considered.
At present, kitchen garbage and municipal solid waste are commonly subjected to landfill and incineration disposal together, so that the problems of secondary pollution such as garbage leachate pollution, dioxin and greenhouse gas emission are caused. More and more countries in the world start to prohibit kitchen waste from entering a landfill, and separate the kitchen waste from household garbage, so that the efficiency of dry garbage incineration power generation is improved. The kitchen waste has higher recycling value, and the recycling recovery gradually becomes the most potential treatment mode, and the kitchen waste recycling way comprises the modes of feed preparation, insect cultivation, composting and the like. However, the insect breeding method also has the defects of immature insect breeding technology, lack of risk assessment of final products and the like, and too high salt and oil content in kitchen waste are unfavorable for insect growth, so the technology has not been popularized and applied on a large scale. Anaerobic digestion and aerobic composting are used as the most widely applied resource technology in industry, and are respectively suitable for application scenes of centralized large-scale treatment and decentralized, medium-small-scale and source decrement treatment, wherein the anaerobic digestion technology has better economic and environmental benefits. The disposal mode of directly using kitchen waste as animal feed is forbidden by national regulations, the kitchen waste can be used as feed resource only through disinfection, processing treatment and biological conversion processes, and the modes of recycling kitchen waste feed include a high-temperature disinfection preparation method and a biological treatment preparation method. The method has complicated steps of recycling treatment, limited application range of the final product and difficult realization of industrial application in a short period.
Disclosure of Invention
The invention aims to provide kitchen waste efficient fermentation carbon source preparation equipment, which solves the problem that the recycling treatment method in the prior art is difficult to realize industrialized application.
The technical scheme adopted by the invention is that the kitchen waste high-efficiency fermentation carbon source preparation equipment comprises a kitchen waste pretreatment device for heating and oil-water separation of kitchen waste which is crushed in advance, wherein the kitchen waste pretreatment device is communicated with a fermentation reactor through a water distribution pipe, the fermentation reactor is provided with a gas stirring device and a three-phase separator from bottom to top, the top of the fermentation reactor is communicated with a gas-liquid separation tower, and the three-phase separator is communicated with the gas-liquid separation tower.
The invention is also characterized in that:
the fermentation reactor comprises a reactor main body, wherein the three-phase separator comprises a first-stage three-phase separator, the first-stage three-phase separator is communicated with a gas-liquid separation tower, the bottom of the gas-liquid separation tower is connected with a central return pipe, the central return pipe stretches into the reactor main body, an outlet is positioned between a water distribution pipe and a gas stirring device, a first-stage gas seal for preventing a gas-liquid mixture generated by the reaction from entering a precipitation area is fixed in the reactor main body, and the first-stage gas seal is positioned below the first-stage three-phase separator.
The three-phase separator also comprises a second-stage three-phase separator, the second-stage three-phase separator is positioned above the first-stage three-phase separator, and the second-stage three-phase separator is correspondingly provided with a second-stage air seal.
The top of the reactor main body is provided with a water outlet weir, the water outlet weir is communicated with a water distribution pipe through a supernatant return pipe, and the supernatant return pipe is provided with a booster pump.
The gas stirring device comprises a booster fan, the booster fan is communicated with a gas diffusion mechanism, the gas diffusion mechanism is positioned in the reactor main body, and the top of the gas-liquid separation tower is communicated with a gas inlet of the booster fan through a gas return pipe.
The kitchen waste pretreatment device comprises a shell, an inlet pipe is connected above the shell, a heater, an oil collecting tank and an oil separation baffle are arranged in the shell, the oil collecting tank is arranged above the heater, an inlet of a water distribution pipe is arranged in the shell, the oil separation baffle is arranged at an outlet side of the shell, one end of the oil separation baffle is fixed with the top of the shell, the other end of the oil separation baffle is arranged above the water distribution pipe, and the oil collecting tank discharges grease through an oil discharge pipe.
The invention further aims to provide a preparation method of the kitchen waste high-efficiency fermentation carbon source.
The invention adopts another technical scheme that the kitchen waste high-efficiency fermentation carbon source preparation method adopts the kitchen waste high-efficiency fermentation carbon source preparation equipment, and comprises the following steps:
The kitchen waste crushed in advance enters a shell, the kitchen waste is layered under the action of a heater, grease on the upper layer enters an oil collecting tank and is discharged through an oil discharge pipe, kitchen waste liquid on the lower layer is injected into the bottom of a reactor main body, gas is blown out by a gas stirring device to fully and uniformly mix kitchen waste liquid and fermentation liquor, fermented kitchen waste is separated from insoluble substances through a first-stage three-phase separator in sequence, supernatant fluid flows out from the top of the reactor main body, gas blown out by the gas stirring device is collected through the first-stage three-phase separator, enters a gas-liquid separation tower to finish separation of fermentation liquor and gas, the fermentation liquor enters the bottom of the reactor main body through a central backflow pipe under the action of gravity, the gas flows back to a gas inlet of the gas stirring device, and part of supernatant fluid flows back to the bottom of the reactor main body.
The kitchen waste dosing proportion of the fermentation reactor is 5-10% of the effective volume of the fermentation reactor, the height-diameter ratio of the reactor main body is 4-6, the I-stage reaction zone is arranged below the first-stage three-phase separator, the II-stage reaction zone is arranged between the first-stage three-phase separator and the second-stage three-phase separator, the sedimentation zone is arranged above the second-stage three-phase separator, and the volume ratio of the three is 55:30:15.
The gas stirring device is characterized in that the gas of the gas stirring device is N 2, and the gas stirring strength is 20-100L/m 3.
The flow velocity of the gas-liquid mixture in the lifting pipes of the primary three-phase separator and the secondary three-phase separator is 0.6-1.2 m/s.
The kitchen waste high-efficiency fermentation carbon source preparation device has the beneficial effects that the kitchen waste pretreatment device synchronously realizes separation and heating of kitchen waste grease, provides basic conditions for subsequent high-efficiency fermentation, adopts supernatant fluid to reflux and adjust kitchen waste solid concentration entering a reaction device, controls rising flow rate, enables muddy water to fully contact, ensures fermentation effect, realizes severe disturbance in a reactor in a pneumatic internal circulation stirring mode, obtains good mass transfer effect, and can effectively improve kitchen waste fermentation acid production efficiency. The preparation method of the kitchen waste high-efficiency fermentation carbon source can hydrolyze and acidify organic matters in the kitchen waste to form fermentation liquor rich in volatile fatty acid, and the fermentation liquor can be used as an external carbon source of a very effective sewage biological treatment unit, and is applied to the field of sewage treatment to realize industrial application.
Drawings
FIG. 1 is a schematic structural view of the kitchen waste high-efficiency fermentation carbon source preparation equipment.
In the figure, 1, a reactor body, 2, a water distribution pipe, 3, a central return pipe, 4, a first-stage gas seal, 5, a first-stage three-phase separator, 6, a second-stage gas seal, 7, a second-stage three-phase separator, 8, an effluent weir, 9, a gas-liquid separation tower, 10, a supernatant return pipe, 11, a booster pump, 12, a gas return pipe, 13, a booster fan, 14, a gas diffusion mechanism, 15, a sludge discharge pipe, 16, an inlet pipe, 17, a shell, 18, a heat exchange coil, 19, a heat medium self-supply pipe, 20, a heat medium return pipe, 21, an oil separation baffle, 22, an oil collecting tank, 23, an oil discharge pipe and 24, a diaphragm metering pump.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
Example 1
The kitchen waste high-efficiency fermentation carbon source preparation equipment comprises a kitchen waste pretreatment device for heating and oil-water separation of kitchen waste which is crushed in advance, wherein the kitchen waste pretreatment device is communicated with a fermentation reactor through a water distribution pipe 2, a diaphragm metering pump 24 is arranged on the water distribution pipe 2, the fermentation reactor is provided with a gas stirring device and a three-phase separator from bottom to top, the top of the fermentation reactor is communicated with a gas-liquid separation tower 9, and the three-phase separator is communicated with the gas-liquid separation tower 9.
The fermentation reactor comprises a reactor main body 1, the three-phase separator comprises a first-stage three-phase separator 5, a lifting pipe of the first-stage three-phase separator 5 is communicated with a gas-liquid separation tower 9, the bottom of the gas-liquid separation tower 9 is connected with a central return pipe 3, the central return pipe 3 stretches into the reactor main body 1, an outlet is positioned between a water distribution pipe 2 and a gas stirring device, a first-stage gas seal 4 for preventing a gas-liquid mixture generated by the reaction from entering a precipitation zone is fixed in the reactor main body 1, and the first-stage gas seal 4 is positioned below an inlet of the first-stage three-phase separator 5. The three-phase separator also comprises a second-stage three-phase separator 7, the second-stage three-phase separator 7 is positioned above the first-stage three-phase separator 5, and a second-stage air seal 6 is correspondingly arranged below the inlet of the second-stage three-phase separator 7. The primary three-phase separator 5 and the secondary three-phase separator 7 are both in conical structures.
In this embodiment, the inner part of the reactor main body 1 is divided into three spaces of upper, middle and lower, wherein the upper space is a precipitation zone, the middle space is a stage II reaction zone, the lower space is a stage I reaction zone, the primary three-phase separator 5 is located in the stage II reaction zone, and the secondary three-phase separator 7 is located in the precipitation zone.
The top of the reactor main body 1 is provided with a water outlet weir 8, the water outlet weir 8 is communicated with the water distribution pipe 2 through a supernatant fluid return pipe 10, the supernatant fluid return pipe 10 is provided with a booster pump 11, and the supernatant fluid return pipe 10 is communicated with the outlet side of a diaphragm metering pump 24 of the water distribution pipe 2. In this embodiment, the pressurizing pump 11 adopts a variable frequency pipeline pump, the reflux amount is adjusted between 50-300%, and the pump lift is not more than 10m. A sludge discharge pipe 15 is arranged at the bottom of the reactor body 1.
The gas stirring device comprises a booster fan 13, the booster fan 13 is communicated with a gas diffusion mechanism 14, and the gas diffusion mechanism 14 is positioned in the reactor main body 1. Further, the gas diffusion mechanism 14 comprises a water outlet pipe, a nozzle is arranged on the water outlet pipe, and a gas outlet at the top of the gas-liquid separation tower 9 is communicated with a gas inlet of the booster fan 13 through a gas return pipe 12 and is used as a gas source of the booster fan 13. The air loss of booster fan 13 is supplemented by an external air source. In the embodiment, the booster fan 13 adopts an explosion-proof motor, the air quantity is 10-20% of the water inflow, and the air pressure is the elevation of the water outlet pipe plus 2 meters of water head.
In the embodiment, the kitchen waste pretreatment device comprises a shell 17, an inlet pipe 16 is connected above the shell 17, a heater, an oil collecting groove 22 and an oil separation baffle 21 are arranged in the shell 17, the oil collecting groove 22 is arranged above the heater and is close to the top end of the shell 17, an inlet of a water distribution pipe 2 is arranged in the shell 17, the oil separation baffle 21 is arranged on the outlet side of the shell 17, one end of the oil separation baffle 21 is fixed with the top of the shell 17, the other end of the oil separation baffle 21 is arranged above the water distribution pipe 2 and used for preventing an oil layer from entering the water distribution pipe 2, and the oil collecting groove 22 discharges grease through an oil discharge pipe 23. Specifically, the heater comprises a heat exchange coil 18, and a heat medium inlet and a heat medium outlet of the heat exchange coil 18 are respectively connected with a heat medium self-supply pipe 19 and a heat medium return pipe 20.
Example 2
The preparation method of the kitchen waste high-efficiency fermentation carbon source adopts the kitchen waste high-efficiency fermentation carbon source preparation equipment, and comprises the following steps:
The kitchen waste crushed in advance enters a shell 17 and is layered under the action of a heater, grease on the upper layer enters an oil collecting tank 22 and is discharged through an oil discharge pipe 23, a diaphragm metering pump 24 quantitatively pumps out kitchen waste liquid on the lower layer and injects the kitchen waste liquid into the bottom of a reactor main body 1, a gas stirring device bulges gas to fully and uniformly mix kitchen waste liquid with fermentation liquid in the reactor main body 1, after the fermented kitchen waste is separated from insoluble substances through a primary three-phase separator 5 and a secondary three-phase separator 7 in sequence, supernatant liquid rich in volatile organic acid flows out from a water outlet at the top of the reactor main body 1 to serve as a standby carbon source, the gas bulged by the gas stirring device is collected through the primary three-phase separator 5 and the secondary three-phase separator 7 and enters a gas-liquid separation tower 9 to finish separation of fermentation liquid and gas, the fermentation liquid enters the bottom of the reactor main body 1 through a central return pipe 3 under the action of gravity, part of the supernatant liquid enters a supernatant liquid 10 from the top of the reactor main body 1 and is collected through a pressurizing pump 11 and then is mixed with the crushed kitchen waste through a water collecting pipe 2 and returns to an I-stage reaction zone.
In the embodiment, the kitchen waste dosing proportion of the fermentation reactor is 5-10% of the effective volume of the fermentation reactor. The height-diameter ratio of the reactor main body 1 is 4-6, a stage I reaction zone is arranged below the primary three-phase separator 5, a stage II reaction zone is arranged between the primary three-phase separator 5 and the secondary three-phase separator 7, a precipitation zone is arranged above the secondary three-phase separator 7, and the volume ratio of the three is 55:30:15. The flow velocity of the gas-liquid mixture in the lifting pipes of the primary three-phase separator 5 and the secondary three-phase separator 7 is 0.6-1.2 m/s, and when the diameter of the reactor main body 1 exceeds 5m, a plurality of lifting pipes can be arranged.
The gas stirring device is characterized in that the gas of the gas stirring device is N 2, and the gas stirring strength is 20-100L/m 3. The effective volume of the gas-liquid separation tower 9 is not more than 15min, the flow rate of the mixed liquid in the central return pipe 3 is 0.8-1.5 m/s, and when the diameter of the reactor main body 1 is larger (more than 5 m), water distribution equipment can be additionally arranged at the tail end of the central return pipe 3 so as to ensure that the mixed liquid is uniformly dispersed to the bottom of the whole reactor main body 1.
According to the kitchen waste high-efficiency fermentation carbon source preparation equipment, the kitchen waste pretreatment device synchronously realizes separation and heating of kitchen waste grease, provides basic conditions for subsequent high-efficiency fermentation, adopts supernatant fluid to reflux and adjust kitchen waste solid concentration entering a reaction device, controls rising flow rate, enables muddy water to fully contact, ensures fermentation effect, and is provided with a gas stirring device at the bottom of a fermentation reactor to fully stir and uniformly mix kitchen waste and fermentation liquid in the reactor so as to improve fermentation efficiency. The preparation method of the kitchen waste high-efficiency fermentation carbon source can hydrolyze and acidify organic matters in the kitchen waste to form fermentation liquor rich in volatile fatty acid, and the fermentation liquor can be used as an external carbon source of a very effective sewage biological treatment unit, so that the aim of high-efficiency recycling of the kitchen waste is fulfilled.
Example 3
The total daily kitchen waste of a staff dining room in a coal mine industry field is 1.3m 3/d, wherein the water content is more than 55 percent, the grease content is 3 percent, the kitchen waste is crushed and then is injected into a kitchen waste pretreatment device with the effective volume of 1.5m 3, hot water with the temperature of 60 ℃ is supplied into the kitchen waste pretreatment device to heat the kitchen waste, the return water temperature is 45-50 ℃, the grease in the heated kitchen waste is separated and floats upwards, and the kitchen waste enters an oil collecting groove 22 and is discharged, and the grease content of the kitchen waste after treatment is as low as below 0.1 percent;
The pretreated kitchen waste is uniformly added into a two-stage fermentation reactor by a diaphragm metering pump 24 according to daily waste yield, the kitchen waste reactor with the effective volume of 15m 3 is arranged according to the dosage rate of 10%, the flow rate of a supernatant reflux pump is 3m 3/h, the lift is 8m, after the supernatant is mixed with the kitchen waste, the supernatant is uniformly arranged at the bottom of a reactor main body 1 by a water distribution pipe 2 at the bottom of the reactor, the volume ratio of the three parts of a two-stage fermentation reactor main body 1 with the diameter of 1.5m and the height of 8.2m, a I-stage reaction zone, a II-stage reaction zone and a sedimentation zone is 55:30:15, the bottom of the reactor is mixed by adopting a pneumatic stirring intensity of 20L/m 3 & min, the flow rates of gas-liquid mixtures in the lifting pipes of a first-stage three-phase separator 5 and a second-stage three-phase separator 7 are respectively 0.8m/s, the effective volume of the gas-liquid separation tower is 1.2m 3, and the flow rate of the reflux pipe in the center 3 is reduced by 0.7m/s.
After fermentation in the I-stage reaction zone and the II-stage reaction zone, organic matters in kitchen waste are hydrolyzed and acidified to form fermentation liquor rich in volatile fatty acid, and the volatile fatty acid in the fermentation liquor is tested for multiple times, so that the content range of the volatile fatty acid is 518-1279 mg/L, the fermentation liquor is an effective additional carbon source of a sewage biological treatment unit, and a new way is provided for recycling the kitchen waste.
Claims (4)
1. The kitchen waste high-efficiency fermentation carbon source preparation equipment is characterized by comprising a kitchen waste pretreatment device for heating and oil-water separation of kitchen waste which is crushed in advance, wherein the kitchen waste pretreatment device is communicated with a fermentation reactor through a water distribution pipe (2), the fermentation reactor is provided with a gas stirring device and a three-phase separator from bottom to top, the top of the fermentation reactor is communicated with a gas-liquid separation tower (9), and the three-phase separator is communicated with the gas-liquid separation tower (9);
The fermentation reactor comprises a reactor main body (1), wherein the three-phase separator comprises a first-stage three-phase separator (5), the first-stage three-phase separator (5) is communicated with a gas-liquid separation tower (9), the bottom of the gas-liquid separation tower (9) is connected with a central return pipe (3), the central return pipe (3) stretches into the reactor main body (1), an outlet is positioned between a water distribution pipe (2) and a gas stirring device, a first-stage gas seal (4) for preventing a gas-liquid mixture generated by the reaction from entering a settling zone is fixed in the reactor main body (1), and the first-stage gas seal (4) is positioned below the first-stage three-phase separator (5);
The top of the reactor main body (1) is provided with a water outlet weir (8), the water outlet weir (8) is communicated with the water distribution pipe (2) through a supernatant return pipe (10), and the supernatant return pipe (10) is provided with a pressurizing pump (11);
The three-phase separator also comprises a second-stage three-phase separator (7), the second-stage three-phase separator (7) is positioned above the first-stage three-phase separator (5), and the second-stage three-phase separator (7) is correspondingly provided with a second-stage air seal (6).
2. The kitchen waste efficient fermentation carbon source preparation device according to claim 1, wherein the gas stirring device comprises a booster fan (13), the booster fan (13) is communicated with a gas diffusion mechanism (14), the gas diffusion mechanism (14) is located in the reactor main body (1), and the top of the gas-liquid separation tower (9) is communicated with a gas inlet of the booster fan (13) through a gas return pipe (12).
3. The kitchen waste efficient fermentation carbon source preparation device according to claim 1, wherein the kitchen waste pretreatment device comprises a shell (17), an inlet pipe (16) is connected above the shell (17), a heater, an oil collecting tank (22) and an oil separating baffle (21) are arranged in the shell (17), the oil collecting tank (22) is located above the heater, an inlet of the water distributing pipe (2) is located in the shell (17), the oil separating baffle (21) is located at an outlet side of the shell (17), one end of the oil separating baffle (21) is fixed with the top of the shell (17), the other end of the oil separating baffle is located above the water distributing pipe (2), and the oil collecting tank (22) discharges grease through an oil discharging pipe (23).
4. The method for preparing the kitchen waste high-efficiency fermentation carbon source is characterized by comprising the following steps of:
The kitchen waste which is crushed in advance enters the shell (17) to be layered under the action of the heater, grease on the upper layer enters the oil collecting tank (22) and is discharged through the oil discharging pipe (23), kitchen waste liquid on the lower layer is injected into the bottom of the reactor main body (1), gas is blown out of the gas stirring device to fully and uniformly mix kitchen waste liquid and fermentation liquid, and after the kitchen waste after fermentation is sequentially separated from insoluble substances through the first-stage three-phase separator (5), supernatant fluid flows out of the top of the reactor main body (1), gas blown out of the gas stirring device is collected through the first-stage three-phase separator (5) and enters the gas-liquid separation tower (9) to finish separation of fermentation liquid and gas, the fermentation liquid enters the bottom of the reactor main body (1) through the central return pipe (3) under the action of gravity, and the gas returns to the gas inlet of the gas stirring device, and part of the supernatant fluid returns to the bottom of the reactor main body (1);
The kitchen waste proportion of the fermentation reactor is 5-10% of the effective volume of the fermentation reactor, the height-diameter ratio of the reactor main body (1) is 4-6, a grade I reaction zone is arranged below the grade I three-phase separator (5), a grade II reaction zone is arranged between the grade I three-phase separator (5) and the grade II three-phase separator (7), a sedimentation zone is arranged above the grade II three-phase separator (7), and the volume ratio of the three is 55:30:15;
the gas stirring device is characterized in that the gas of the gas stirring device is N 2, and the gas stirring strength is 20-100L/m 3;
The flow velocity of the gas-liquid mixture in the lifting pipes of the primary three-phase separator (5) and the secondary three-phase separator (7) is 0.6-1.2 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311585638.1A CN117757600B (en) | 2023-11-24 | 2023-11-24 | Equipment and method for preparing carbon source from kitchen waste with high efficiency fermentation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311585638.1A CN117757600B (en) | 2023-11-24 | 2023-11-24 | Equipment and method for preparing carbon source from kitchen waste with high efficiency fermentation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117757600A CN117757600A (en) | 2024-03-26 |
| CN117757600B true CN117757600B (en) | 2025-01-21 |
Family
ID=90313466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311585638.1A Active CN117757600B (en) | 2023-11-24 | 2023-11-24 | Equipment and method for preparing carbon source from kitchen waste with high efficiency fermentation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117757600B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119733467B (en) * | 2025-03-05 | 2025-05-02 | 大连大平油脂化学有限公司 | Continuous acidification equipment and acidification process for fatty acid production |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203715626U (en) * | 2013-12-31 | 2014-07-16 | 成都恒润高新科技有限公司 | System for fermenting biogas by utilizing kitchen waste oil |
| CN106269814A (en) * | 2016-10-25 | 2017-01-04 | 苏州美生环保科技有限公司 | A kind of kitchen garbage treater |
| CN109694130A (en) * | 2019-03-08 | 2019-04-30 | 苏州科技大学 | A kind of device and its application method realized sludge suspension and avoid sludge loss |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732564B (en) * | 2011-04-07 | 2014-03-26 | 宁波开诚生态技术有限公司 | Method for comprehensive treatment on high-water content organic waste |
| CN102492726B (en) * | 2011-11-21 | 2013-07-31 | 浙江大学 | Method and device for producing hydrogen and methane through fermentation of residual sludge |
| CN204523738U (en) * | 2015-01-30 | 2015-08-05 | 无锡利邦厨具有限公司 | A kind of rubbish from cooking process all-in-one |
| CN110293114B (en) * | 2019-06-24 | 2021-07-27 | 西安科技大学 | A system and method for co-processing of kitchen waste and domestic sewage |
| CN210302527U (en) * | 2019-07-30 | 2020-04-14 | 天津碧海环保技术咨询服务有限公司 | Three-phase separator for kitchen waste grease recovery processing |
| CN213112823U (en) * | 2020-06-22 | 2021-05-04 | 浙江传超环保科技有限公司 | A high-efficiency oil residue separation integrated device for kitchen wastewater |
| CN113044981A (en) * | 2021-04-30 | 2021-06-29 | 南京环美科技股份有限公司 | ICST continuous internal circulation stirring anaerobic reactor |
| CN217964069U (en) * | 2022-07-12 | 2022-12-06 | 杭州上拓碧水环保科技有限公司 | Treatment system for reducing carbon emission in kitchen waste treatment |
| CN115636505A (en) * | 2022-10-09 | 2023-01-24 | 上海清宁环境规划设计有限公司 | High-efficiency anaerobic bioreactor with enhanced circulation |
-
2023
- 2023-11-24 CN CN202311585638.1A patent/CN117757600B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203715626U (en) * | 2013-12-31 | 2014-07-16 | 成都恒润高新科技有限公司 | System for fermenting biogas by utilizing kitchen waste oil |
| CN106269814A (en) * | 2016-10-25 | 2017-01-04 | 苏州美生环保科技有限公司 | A kind of kitchen garbage treater |
| CN109694130A (en) * | 2019-03-08 | 2019-04-30 | 苏州科技大学 | A kind of device and its application method realized sludge suspension and avoid sludge loss |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117757600A (en) | 2024-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102745809B (en) | Anaerobic fluidized bed reactor | |
| CN102603124B (en) | Two-phase two-period anaerobic organism reactor for processing wastewater | |
| CN101597562A (en) | Secondary anaerobic fermentation and power generation system for large and medium-sized biogas projects | |
| CN108658638A (en) | A kind of device with anaerobic fermentation and medium temperature oxidization combination operation production organic fertilizer | |
| US20220119746A1 (en) | Anaerobic digestion device based on self-sustained air flotation | |
| CN101423292A (en) | Anaerobic bioreactor for treating high concentration printing and dyeing wastewater and method thereof | |
| CN105152506A (en) | High-temperature microaerobic-anaerobic digestion method for organic sludge | |
| CN104593433B (en) | A kind of antibiotic bacterium dregs processing method and equipment | |
| CN117757600B (en) | Equipment and method for preparing carbon source from kitchen waste with high efficiency fermentation | |
| CN106830591A (en) | A kind of method for improving anaerobic fermentation of kitchen waste biogas residue dewatering | |
| CN106115911A (en) | A kind of vinasse fermentation produces the device and method of biogas | |
| CN215327204U (en) | Efficient wet-type anaerobic reactor for treating kitchen waste | |
| CN102010113A (en) | Anaerobic solid reactor | |
| CN203284246U (en) | Anaerobic reactor for landfill leachate treatment | |
| CN113502208B (en) | Three-phase separation complete mixing type anaerobic reactor | |
| CN207608474U (en) | Reactor for treating excess sludge by cavitation jet | |
| CN212246656U (en) | A molasses alcohol wastewater treatment device | |
| CN211712738U (en) | Water treatment system based on split type anaerobic membrane bioreactor | |
| CN101665305B (en) | Method for processing straw-pulp-papermaking wastewater by using combined UASB plus A/O technique | |
| CN203904167U (en) | Biochemical sludge treatment system | |
| CN101386449A (en) | An anaerobic reactor for treating wastewater with high organic concentration and high solid content | |
| CN108841580B (en) | Hydrogen-producing and methane-producing reactor for treating solid waste | |
| CN201433210Y (en) | A Biogas Lifting Type Enhanced Anaerobic Reactor | |
| CN215905931U (en) | ICST continuous internal circulation stirring anaerobic reactor | |
| CN104071955A (en) | Sludge biochemical treatment system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |