Device and method for degrading organic wastes by using illumination-enhanced carbon nitride

Abstract

The invention discloses a device and a method for degrading organic waste by illumination-enhanced carbon nitride, and relates to the technical field of anaerobic digestion equipment, the device comprises an anaerobic digestion reactor, a stirring device is arranged in the anaerobic digestion reactor, and a temperature control device and an illumination device are further arranged on the anaerobic digestion reactor. Organic waste, carbon nitride and ferrihydrite are placed in the anaerobic digestion reactor, the stirring device is used for stirring materials in the anaerobic digestion reactor, and the illumination device is used for providing illumination for the materials in the anaerobic digestion reactor. And the temperature control device is used for controlling the internal temperature of the anaerobic digestion reactor. Carbon nitride and ferrihydrite are added and coupled with intermittent illumination to generate active oxygen species to accelerate degradation of macromolecular organic matters, and photoelectrons are provided to promote methane production, so that the anaerobic digestion reaction efficiency and stability in the anaerobic digestion reactor are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anaerobic digestion equipment, in particular to a device for degrading organic waste by light-enhanced nitrogenated carbon and a degradation method thereof. BACKGROUND

[0002] With the rapid development of China's economy and society, a large amount of organic solid waste is generated in the process of production and life. Since the organic solid waste has a high content of organic matter, improper disposal can cause serious pollution and a large amount of carbon emissions. Therefore, the resource utilization of organic waste has become an important task for pollution reduction and carbon reduction. Anaerobic digestion is one of the most practical and effective methods for realizing the reduction and resource utilization of medium and high concentration organic waste. However, the problems of slow hydrolysis and acidification of complex substrates in organic waste (especially lignocellulose components contained in agricultural waste) and low methane conversion rate hinder the large-scale application of anaerobic digestion.

[0003] Therefore, there is an urgent need in the art for a device for degrading organic waste by light-enhanced nitrogenated carbon and a degradation method thereof to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a device for degrading organic waste by light-enhanced nitrogenated carbon and a degradation method thereof to solve the problems existing in the prior art, accelerate the degradation of macromolecular organic matter, and improve the conversion efficiency of methane.

[0005] To achieve the above purpose, the present application provides the following solutions: The present application discloses a device for degrading organic waste by light-enhanced nitrogenated carbon, comprising an anaerobic digestion reactor, wherein the inside of the anaerobic digestion reactor is provided with a stirring device, and the anaerobic digestion reactor is further provided with a temperature control device and a light device; the inside of the anaerobic digestion reactor is used for placing organic waste, nitrogenated carbon and water iron ore; the stirring device is used for stirring the materials in the inside of the anaerobic digestion reactor; the light device is used for providing light to the materials in the inside of the anaerobic digestion reactor; and the temperature control device is used for controlling the internal temperature of the anaerobic digestion reactor.

[0006] Preferably, the anaerobic digestion reactor is made of transparent material, and the light device is arranged on the outer wall of the anaerobic digestion reactor.

[0007] Preferably, the material of the anaerobic digestion reactor is acrylic, and the light device is a lamp strip.

[0008] Preferably, the upper end of the anaerobic digestion reactor is detachably connected with a reactor cover plate, the reactor cover plate is connected with an exhaust pipe, the exhaust pipe is provided with an exhaust valve, and the end of the exhaust pipe away from the reactor cover plate is connected with a methane collection container.

[0009] Preferably, the stirring device comprises a stirring motor, an output shaft of the stirring motor is connected with a stirring rotating shaft, a plurality of stirring blades are arranged on an end of the stirring rotating shaft away from the stirring motor, and the stirring rotating shaft penetrates through the reactor cover plate.

[0010] Preferably, the anaerobic digestion reactor is installed on a supporting base.

[0011] Preferably, the temperature control device comprises a water bath and a water bath insulation layer, the water bath insulation layer is arranged on an outer wall of the anaerobic digestion reactor, a first circulating pipe is connected between a liquid outlet of the water bath insulation layer and a liquid inlet of the water bath, a water inlet pump and a water inlet valve are arranged on the first circulating pipe, a second circulating pipe is connected between a liquid inlet of the water bath insulation layer and a liquid outlet of the water bath, and a water outlet valve is arranged on the second circulating pipe.

[0012] Preferably, a feeding pipe and a discharging pipe are connected to a side wall of the anaerobic digestion reactor, a feeding valve is arranged on the feeding pipe, and a discharging valve is arranged on the discharging pipe.

[0013] The application discloses a degradation method based on the above-mentioned light-enhanced carbon nitride degradation device for organic waste, which comprises the following steps: S1, inoculating sludge, organic waste, carbon nitride and ferrihydrite into the anaerobic digestion reactor; S2, starting the stirring device and the light device at regular time every day, and maintaining the temperature inside the anaerobic digestion reactor by using the temperature control device; S3, when the organic waste replacement time is reached, putting new organic waste, carbon nitride and ferrihydrite into the anaerobic digestion reactor, and discharging part of the organic waste, carbon nitride and ferrihydrite in the anaerobic digestion reactor.

[0014] Preferably, the TS of the inoculating sludge is 55 g / L-65 g / L, the addition amount of the organic waste is 50 g / L-150 g / L, the addition amount of the carbon nitride is 0.5 g / L-1.5 g / L, and the addition amount of the ferrihydrite is 15 mM. The stirring device stirs for 15-45 min every hour; The temperature control device controls the temperature inside the anaerobic digestion reactor to be 35℃-40℃. The light device is illuminated for 8-16 h every day, and the illumination intensity is 2500 lx-7500 lx.

[0015] The application has the following technical effects compared with the prior art: The application provides a device for degrading organic waste by light-enhanced carbon nitride and a degradation method thereof, and the device and the degradation method have the following advantages: on one hand, under light conditions, carbon nitride can generate reactive oxygen species such as ·OH, and the addition of ferrihydrite can accelerate the generation of ·OH to attack organic matter, promote the decomposition of macromolecular organic matter into small molecules, provide suitable environment and substrate conditions for methane production, and promote methane production; on the other hand, under light conditions, carbon nitride can generate photoelectrons to provide reducing power for the methane production process, accelerate the reduction of carbon dioxide, and promote methane production. The application utilizes the coupling of intermittent light, the addition of carbon nitride and ferrihydrite to generate reactive oxygen species to accelerate the degradation of macromolecular organic matter, and to provide photoelectrons to promote methane production, so as to improve the anaerobic consumption reaction efficiency and stability in the anaerobic digestion reactor. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described in the following are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 Figure 1 is a structural schematic diagram of the device for degrading organic waste by light-enhanced carbon nitride in Embodiment 1. In the figure, 1 is a water bath, 2 is a first circulation pipe, 3 is a water inlet pump, 4 is a water inlet valve, 5 is a feeding pipe, 6 is a feeding valve, 7 is a water bath insulation layer, 8 is carbon nitride, 9 is a stirring blade, 10 is an anaerobic digestion reactor, 11 is a reactor cover plate, 12 is a stirring shaft, 13 is a stirring motor, 14 is an exhaust valve, 15 is a methane collection container, 16 is an exhaust pipe, 17 is a water outlet valve, 18 is a light device, 19 is a second circulation pipe, 20 is a discharging pipe, 21 is a discharging valve, and 22 is a supporting base. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0019] The purpose of the present application is to provide a device for degrading organic waste by light-enhanced carbon nitride and a degradation method thereof, to solve the problems in the prior art, to accelerate the degradation of macromolecular organic matter, and to improve the conversion efficiency of methane.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1 like Figure 1 As shown, this embodiment provides a photo-enhanced carbon nitride degradation device for organic waste, including an anaerobic digestion reactor 10. The anaerobic digestion reactor 10 is equipped with a stirring device inside to ensure uniform mixing. A temperature control device and a light source 18 are also provided on the outer wall of the anaerobic digestion reactor 10. The interior of the anaerobic digestion reactor 10 is used to hold organic waste, carbon nitride 8, and ferrous sulfate. The stirring device is used to stir the materials inside the anaerobic digestion reactor 10, the light source 18 is used to provide illumination to the materials inside the anaerobic digestion reactor 10, and the temperature control device is used to control the internal temperature of the anaerobic digestion reactor 10.

[0022] In practical use, simply place the organic waste to be anaerobic, carbon 8, and ferrohydrate into the anaerobic digester 10, allowing the anaerobic digestion reaction to take place inside. During this process, a stirring device is needed to intermittently stir the materials inside the anaerobic digester 10 to ensure uniform mixing. A temperature control device maintains a suitable temperature environment for the anaerobic digestion reaction inside the anaerobic digester 10. The illumination device 18 provides a light environment inside the anaerobic digester 10. On one hand, under illumination, carbon 8 can generate reactive oxygen species, such as ·OH, to attack organic matter, promoting the decomposition of large organic molecules into smaller molecules, providing a suitable environment and substrate conditions for methanogenesis, thus promoting methanogenesis. On the other hand, under illumination, carbon 8 can generate photoelectrons, providing reducing power for the methanogenesis process, accelerating carbon dioxide reduction to promote methanogenesis. Furthermore, the trace amounts of oxygen introduced into the feed can react with the Fe produced by the reduction of ferrohydrate. 2+ A Fenton-like reaction occurs, generating more reactive oxygen species. The reduction of ferrous oxide produces Fe... 2+ It can also be coupled to accelerate the efficiency of carbon nitride in producing ·OH. Finally, by adding carbon nitride and coupling with intermittent light, reactive oxygen species are generated to accelerate the degradation of macromolecular organic matter and provide photoelectrons to promote methanogenesis, thereby improving the anaerobic consumption reaction efficiency and stability in the anaerobic digester 10.

[0023] In this embodiment, the anaerobic digester 10 is made of transparent material, and the light irradiation device 18 is disposed on the outer wall of the anaerobic digester 10. The light transmittance of the anaerobic digester 10 allows the light emitted by the light irradiation device 18 disposed outside the anaerobic digester 10 to irradiate the carbon nitride 8 inside the anaerobic digester 10.

[0024] In the embodiment, the material of the anaerobic digestion reactor 10 includes but is not limited to the existing transparent acrylic material. The light device 18 is a lamp strip, which is wound on the outer wall of the anaerobic digestion reactor 10.

[0025] In the embodiment, the upper end of the anaerobic digestion reactor 10 is detachably connected with the reactor cover plate 11. Specifically, the reactor cover plate 11 and the upper end of the anaerobic digestion reactor 10 are provided with corresponding connecting holes, and the connecting bolts are sequentially passed through the connecting holes of the reactor cover plate 11 and the upper end of the anaerobic digestion reactor 10 to realize the detachable connection of the two. The reactor cover plate 11 is connected with the exhaust pipe 16, and the exhaust valve 14 is arranged on the exhaust pipe 16. The exhaust valve 14 controls the pipeline flow of the exhaust pipe 16. The end of the exhaust pipe 16 away from the reactor cover plate 11 is connected with the methane collection container 15, which can be the existing gas storage bag. During the anaerobic digestion reaction, the exhaust valve 14 is in the open state, so that the methane generated in the anaerobic digestion reactor 10 can enter the methane collection container 15 through the exhaust pipe 16.

[0026] In the embodiment, the stirring device includes a stirring motor 13, which can be fixed on the reactor cover plate 11 through a support. The output shaft of the stirring motor 13 is connected with a stirring shaft 12, and a plurality of stirring blades 9 are arranged on the end of the stirring shaft 12 away from the stirring motor 13. The stirring blades 9 are located in the anaerobic digestion reactor 10 during the anaerobic digestion reaction. The stirring shaft 12 penetrates the reactor cover plate 11, and a sealing ring is arranged between the corresponding through hole of the reactor cover plate 11 and the stirring shaft 12, so as to ensure the airtightness of the anaerobic digestion reactor 10. During the anaerobic digestion reaction, only the stirring motor 13 needs to be started, and the stirring motor 13 drives the stirring blades 9 to rotate through the stirring shaft 12, so as to stir the materials in the anaerobic digestion reactor 10. The components in the materials are uniformly mixed, and the carbon nitride 8 in each position of the anaerobic digestion reactor 10 can be sufficiently irradiated by the light device 18.

[0027] In the embodiment, the anaerobic digestion reactor 10 is installed on the support base 22, which supports the anaerobic digestion reactor 10.

[0028] In the embodiment, the temperature control device comprises a water bath 1 and a water bath insulation layer 7, and the water bath insulation layer 7 is arranged on the outer wall of the anaerobic digestion reactor 10. The outlet of the water bath insulation layer 7 is connected with the inlet of the water bath 1 through a first circulating pipe 2, and the first circulating pipe 2 is provided with a water inlet pump 3 and a water inlet valve 4. The water inlet pump 3 provides power for the flow of circulating water, and the water inlet valve 4 is used to control the flow of liquid in the first circulating pipe 2. The inlet of the water bath insulation layer 7 is connected with the outlet of the water bath 1 through a second circulating pipe 19, and the second circulating pipe 19 is provided with a water outlet valve 17, which is used to control the flow of liquid in the second circulating pipe 19.

[0029] In actual use, the water with lower temperature in the water bath insulation layer 7 flows into the water bath 1 through the first circulating pipe 2, and the water bath 1 is used to heat the water with lower temperature. The water with higher temperature in the water bath 1 flows into the water bath insulation layer 7 again through the second circulating pipe 19, so as to improve the temperature of the liquid in the water bath insulation layer 7 and ensure the constant temperature of the inside of the anaerobic digestion reactor 10.

[0030] In the embodiment, the side wall of the anaerobic digestion reactor 10 is connected with a feeding pipe 5 and a discharging pipe 20, the feeding pipe 5 is provided with a feeding valve 6, and the organic waste to be subjected to anaerobic digestion reaction can enter from the feeding pipe 5. The feeding valve 6 is used to control the flow of materials in the feeding pipe 5. The discharging pipe 20 is provided with a discharging valve 21, and the materials in the inside of the anaerobic digestion reactor 10 can be discharged to the outside waste collecting container through the discharging pipe 20. The discharging valve 21 is used to control the flow of materials in the discharging pipe 20.

[0031] Embodiment two The embodiment provides a degradation method based on the light-enhanced carbon nitride 8 degradation organic waste device disclosed in embodiment one, which comprises the following steps: S1, open the reactor cover plate 11, and add inoculated sludge, organic waste, carbon nitride 8 and ferrihydrite into the anaerobic digestion reactor 10. The inoculated sludge can be anaerobic sludge discharged from an anaerobic fermentation tank of a sewage treatment plant, and the organic waste can be sheep manure.

[0032] S2, start the stirring device and the light device 18 on time every day, and use the temperature control device to maintain the temperature in the inside of the anaerobic digestion reactor 10.

[0033] S3, when the replacement time of organic waste is reached, new organic waste, carbonated nitrogen 8 and water iron ore are put into the anaerobic digestion reactor 10, it should be noted that the inoculation sludge does not need to be added again, and its role can be replaced by the organic waste. And part of the organic waste, carbonated nitrogen 8 and water iron ore in the anaerobic digestion reactor 10 are discharged, it should be noted that the amount of the discharged organic waste, carbonated nitrogen 8 and water iron ore and the amount of the new organic waste, carbonated nitrogen 8 and water iron ore put in are the same, so that the total amount in the anaerobic digestion reactor 10 remains unchanged.

[0034] In this embodiment, the TS (total solid) value of the inoculation sludge is 55 g / L-65 g / L, preferably 60 g / L. The dosage of the organic waste is 50 g / L-150 g / L, preferably 60 g (dry weight) / L, and the dosage of the water iron ore is 5-50 mM, preferably 15 mM. The dosage of the carbonated nitrogen 8 is 0.5 g / L-1.5 g / L, preferably 1.0 g / L. In addition, the volume of the inoculation sludge put in is 20%-40% of the maximum amount of the inoculation sludge to start the anaerobic reactor, preferably 30%.

[0035] The stirring motor 13 drives the stirring blade 9 to rotate through the stirring shaft 12. The stirring device stirs for 15-45 min on average per hour, and the optimal stirring time is 30 min. The rotating speed of the stirring shaft 12 is set to 40-60 rpm, and the optimal rotating speed is 50 rpm, so that the carbonated nitrogen 8 and the water iron ore can be uniformly distributed in the inoculation sludge in the anaerobic digestion reactor 10.

[0036] The temperature control device controls the temperature inside the anaerobic digestion reactor 10 to be 35℃-40℃, and the optimal temperature is 37℃.

[0037] The pH value in the anaerobic digestion reactor 10 is controlled to be 7.5-8.2, and the optimal pH value is 7.8. When the temperature is lower than the preset value, sodium bicarbonate can be added to the anaerobic digestion reactor 10.

[0038] The illumination time of the illumination device 18 is 8-16 h per day, and the optimal illumination time is 12 h. The illumination intensity is 2500 lx-7500 lx, and the optimal illumination intensity is 5000 lx, so as to realize intermittent illumination.

[0039] The solid retention time of the anaerobic digester 10 is controlled to be between 10-30 days, and the optimal is 20 days. That is, at the beginning of the reaction, the inoculated sludge, organic waste, nitrogenated carbon 8 and ferrihydrite are all put into the upper end of the anaerobic digester 10, and then the reactor cover plate 11 is closed. Then every 1-3 days, a new mixture of organic waste, nitrogenated carbon 8 and ferrihydrite is put into the anaerobic digester 10 through the feeding pipe 5, and an equal amount of solid in the anaerobic digester 10 is discharged through the discharge pipe 20. It is generally considered that the inoculated sludge and organic waste in the anaerobic digester 10 are replaced once between 10-30 days, and the specific time can be 20 days.

[0040] In this embodiment, the preparation process of the nitrogenated carbon 8 includes the following steps: (1) Put the weighed melamine (2 g) and ammonium chloride (10 g) into the agate mortar, grind thoroughly for 10-15 minutes, until a uniform fine powder is formed.

[0041] (2) Transfer the mixed powder to an alumina crucible with a cover, leaving a gap in the crucible cover. Place it in a muffle furnace, and heat it at a rate of 5°C / min to 550°C, and keep it at this temperature for 2 hours. The calcination is carried out in an air atmosphere. After the reaction is completed, naturally cool to room temperature to obtain a light yellow or yellow solid powder.

[0042] The actual use process and experimental results are as follows: The feed (100 g (dry weight) / L) is prepared with sheep manure as the main substrate (i.e. organic waste), and the anaerobic sludge (i.e. inoculated sludge) is inoculated at a ratio of 30% into the anaerobic digester 10, and the nitrogenated carbon 8 is put into the anaerobic digester 10 at a rate of 1.0 g / L and the ferrihydrite is put into the anaerobic digester 10 at a rate of 15 mM, and the temperature in the anaerobic digester 10 is maintained at 37°C, the pH is 7.8, the solid retention time is 20 days, and the light duration is controlled to be 12 h / 24 h. After the experiment, the methane production is increased by 43.69% compared with the blank group.

[0043] In the description of the present application, it needs to be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance. Therefore, the features defined as "first", "second" and the like can be explicitly or implicitly included one or more times. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0044] In the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0045] If the present application discloses or involves parts or structural elements that are fixedly connected to each other, unless otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, connected by bolts or screws), or as: non-detachable fixed connection (for example, riveting, welding), of course, the fixed connection can also be replaced by integral structure (for example, manufactured by integral forming process) (except for obvious cases that cannot be used by integral forming process).

[0046] In addition, the terms used to indicate the positional relationship or shape in any technical solution disclosed by the present application include states or shapes similar, similar or close to them, unless otherwise stated.

[0047] Any component provided by the present application can be assembled from multiple individual components, or can be a single component manufactured by integral forming process.

[0048] It should be noted that the structure, proportion, size and the like shown in the drawings of the present application are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope covered by the technical content disclosed by the present application.

[0049] It should be noted that the same reference signs are used to denote the same component or the same part throughout the drawings in the embodiments of the present application.

[0050] Any modification made according to actual demands is within the scope of protection of the present application.

[0051] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for the ordinary skilled person in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application ranges. In conclusion, the content of the present description should not be understood as a limitation on the present application.

Claims

1. A device for photo-enhanced carbon nitride degradation of organic waste, characterized in that: The anaerobic digester (10) includes an anaerobic digester (10) with a stirring device inside, a temperature control device and a light source (18) on the anaerobic digester (10). The anaerobic digester (10) is used to place organic waste, carbon nitride (8) and ferrohydrate. The stirring device is used to stir the materials inside the anaerobic digester (10). The light source (18) is used to provide light to the materials inside the anaerobic digester (10). The temperature control device is used to control the internal temperature of the anaerobic digester (10).

2. The light-enhanced carbon nitride degradation organic waste device according to claim 1, characterized in that: The anaerobic digester (10) is made of transparent material, and the light-emitting device (18) is installed on the outer wall of the anaerobic digester (10).

3. The light-enhanced carbon nitride degradation organic waste device according to claim 2, characterized in that: The anaerobic digester (10) is made of acrylic, and the lighting device (18) is a light strip.

4. The light-enhanced carbon nitride degradation organic waste device according to claim 1, characterized in that: The upper end of the anaerobic digester (10) is detachably connected to a reactor cover plate (11), and an exhaust pipe (16) is connected to the reactor cover plate (11). An exhaust valve (14) is provided on the exhaust pipe (16), and a methane collection container (15) is connected to the end of the exhaust pipe (16) away from the reactor cover plate (11).

5. The light-enhanced carbon nitride degradation organic waste device according to claim 4, characterized in that: The stirring device includes a stirring motor (13), the output shaft of which is connected to a stirring shaft (12). The stirring shaft (12) has multiple stirring blades (9) on one end away from the stirring motor (13), and the stirring shaft (12) passes through the reactor cover plate (11).

6. The light-enhanced carbon nitride degradation organic waste device according to claim 1, characterized in that: The anaerobic digester (10) is mounted on a support base (22).

7. The light-enhanced carbon nitride degradation organic waste device according to claim 1, characterized in that: The temperature control device includes a water bath (1) and a water bath insulation layer (7). The water bath insulation layer (7) is disposed on the outer wall of the anaerobic digestion reactor (10). The outlet of the water bath insulation layer (7) is connected to the inlet of the water bath (1) via a first circulation pipe (2). The first circulation pipe (2) is equipped with an inlet pump (3) and an inlet valve (4). The inlet of the water bath insulation layer (7) is connected to the outlet of the water bath (1) via a second circulation pipe (19). The second circulation pipe (19) is equipped with an outlet valve (17).

8. The light-enhanced carbon nitride degradation organic waste device according to claim 1, characterized in that: The anaerobic digester (10) is connected to a feed pipe (5) and a discharge pipe (20) on its side wall. The feed pipe (5) is equipped with a feed valve (6), and the discharge pipe (20) is equipped with a discharge valve (21).

9. A degradation method, characterized in that, The light-enhanced carbon nitride degradation organic waste device according to any one of claims 1-8 includes the following steps: S1. Add seed sludge, organic waste, carbon nitride (8) and ferrous sulfate to the anaerobic digester (10); S2. Start the stirring device and the lighting device (18) on time every day, and use the temperature control device to maintain the temperature inside the anaerobic digester (10); S3. When the organic waste replacement time is reached, new organic waste, carbon nitride (8) and ferrohydrate are put into the anaerobic digester (10), and some of the organic waste, carbon nitride (8) and ferrohydrate are discharged from the anaerobic digester (10).

10. The degradation method according to claim 9, characterized in that: The TS of the introduced sludge is 55 g / L-65 g / L, the amount of organic waste added is 50 g / L-150 g / L, the amount of carbon nitride (8) added is 0.5 g / L-1.5 g / L, and the amount of ferroalloy added is 15 mM. The stirring device stirs for 15-45 minutes per hour; The temperature control device keeps the temperature inside the anaerobic digester (10) between 35°C and 40°C. The illumination device (18) has a daily illumination time of 8-16 hours and an illumination intensity of 2500lx-7500lx.

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