Device for preparing carbon source from kitchen waste leachate

Abstract

The utility model discloses a device for preparing a carbon source from kitchen waste leachate, and relates to the technical field of sewage treatment. The device mainly comprises a kitchen waste leachate storage tank, a reaction stirring tank, a homogeneous stirring tank, a hydrolytic acidification tank, a solid-liquid separation device, an air flotation machine, a fermentation liquor storage tank and an electric control cabinet. The device adopts a split series structure, and is additionally provided with a hydrolase adding device and an electric control cabinet, so that the whole device is automatically controlled, the reaction rate in the device is improved, and the equipment volume and the occupied area are reduced. According to the device, the kitchen waste leachate is prepared into the carbon source for the first time, on one hand, harmless treatment of the kitchen waste leachate can be achieved, on the other hand, resource utilization of the kitchen waste leachate can be achieved, the adding amount of the chemical carbon source in the related sewage treatment process is reduced, and good economic benefits and environmental benefits are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a resource treatment system for leachate of kitchen waste. Background Art

[0002] Leachate from food waste is a high-concentration organic wastewater generated during the resource treatment and disposal of food waste. It has the characteristics of high organic matter content, and its organic carbon content is usually above 100,000 mg / L. At present, the main treatment method for this type of wastewater in China is to convert organic carbon into methane or carbon dioxide as much as possible through anaerobic biogas production in series with aerobic biological treatment after pretreatment by physical and chemical means. This treatment process consumes a large amount of chemical agents and electricity. At the same time, in the treatment of low-carbon-nitrogen ratio wastewater such as leachate from old landfills or municipal sewage, in order to ensure the appropriate carbon-nitrogen ratio required for denitrification and denitrification, a large amount of carbon source, such as glucose, sodium acetate or methanol, needs to be added. This forms a paradox of completely decomposing the organic carbon source on the one hand and adding the organic carbon source on the other hand, resulting in a huge waste of resources. However, the leachate from food waste contains a large amount of refractory organic matter. It is not feasible to directly use the leachate from food waste for the treatment of low-carbon-nitrogen ratio wastewater. This problem is a key barrier to the resource utilization of leachate from food waste. Utility Model Content

[0003] In view of the above technical difficulties, the utility model provides a device for preparing a carbon source from kitchen waste leachate, which can decompose the difficult-to-degrade organic matter in the kitchen waste leachate into a biodegradable composite carbon source.

[0004] The specific technical solutions adopted by this utility model are as follows:

[0005] The utility model provides a device for preparing a carbon source from kitchen waste leachate, comprising a kitchen waste leachate storage tank, a reaction stirring tank, a homogenization stirring tank, a hydrolysis acidification tank, a solid-liquid separation device, an air flotation machine, a fermentation liquid storage tank and an electrical control cabinet;

[0006] The leachate outlet of the kitchen waste leachate storage tank is connected to the reaction stirring tank feed port of the reaction stirring tank through a pipeline, and a hydrolase dosing device is provided on the top of the reaction stirring tank; the reaction stirring tank discharge port of the reaction stirring tank is connected to the homogenizing stirring tank feed port of the homogenizing stirring tank through a pipeline, and a liquid alkali dosing device is provided on the top of the homogenizing stirring tank; the homogenizing stirring tank discharge port of the homogenizing stirring tank is connected to the hydrolysis acidification tank feed port of the hydrolysis acidification tank through a pipeline, and the hydrolysis acidification tank discharge port of the hydrolysis acidification tank is connected to the air flotation machine feed port of the air flotation machine through a pipeline, and the air flotation machine The discharge port of the machine is connected with the fermentation liquid storage tank through a pipeline; the slag discharge port at the bottom of the food waste leachate storage tank, the mud discharge port at the bottom of the hydrolysis acidification tank and the mud discharge port of the flotation machine at the bottom of the flotation machine are all connected with the solid-liquid separation device through a pipeline, and the upper liquid separated by the solid-liquid separation device is connected with the leachate feed port of the food waste leachate storage tank through a pipeline; all the electronic control machines and instruments in the food waste leachate storage tank, the reaction stirring tank, the homogenizing stirring tank, the hydrolysis acidification tank, the solid-liquid separation device, the flotation machine and the fermentation liquid storage tank are connected to the electrical control cabinet and controlled.

[0007] Preferably, the food waste leachate storage tank comprises a leachate feed inlet, a leachate storage tank body, an internal partition, an oil discharge port, a slag discharge port, a grease recovery barrel and a leachate lifting pump; a leachate feed inlet is provided in the middle of one side wall of the leachate storage tank body, and a leachate outlet is provided in the middle of the other side wall of the opposite side, and the leachate outlet is connected to the reaction stirring tank through a pipeline provided with a leachate lifting pump; a vertical internal partition is provided inside the leachate storage tank body along the fluid flow direction, which can divide the inner cavity into three series areas, and the adjacent areas are connected by a guide pipe; the oil discharge ports are respectively provided in two upstream areas of the leachate storage tank body, and the center height position is flush with the water level line; each oil discharge port is connected to the grease recovery barrel through a pipeline; the slag discharge port is respectively provided in three areas of the leachate storage tank body, and the center height position is close to the bottom.

[0008] Furthermore, the water inlet of the guide pipe is located at an upper position on the bottom of the leachate storage tank body, and the water outlet is located at a lower position on the top of the leachate storage tank body, so that the leachate flows from the lower layer of the front area to the upper layer of the rear area.

[0009] Preferably, the reaction stirring tank comprises a reaction stirring tank feed port, a reaction stirring tank body, a reaction stirring tank stirring device, a reaction stirring tank discharge port and a hydrolase dosing device; a reaction stirring tank feed port is provided at the lower part of one side wall of the reaction stirring tank body, a reaction stirring tank discharge port is provided at the upper part of the other side wall opposite to the reaction stirring tank body, a reaction stirring tank stirring device is provided inside, and the top is connected to the hydrolase dosing device through a pipeline.

[0010] Preferably, the homogenizing stirring tank comprises a homogenizing stirring tank feed port, a homogenizing stirring tank body, a homogenizing stirring tank stirring device, a heating device, a homogenizing stirring tank discharge port and a liquid alkali adding device; a homogenizing stirring tank feed port is provided at the lower part of one side wall of the homogenizing stirring tank body, a homogenizing stirring tank discharge port is provided at the upper part of the other side wall opposite to the homogenizing stirring tank body, a homogenizing stirring tank stirring device is provided inside, a heating device is provided around the side wall, and a liquid alkali adding device is connected to the top through a pipeline.

[0011] Furthermore, the heating device adopts electric heating and is equipped with a temperature feedback instrument with a temperature control range of 60-80°C.

[0012] Furthermore, the liquid alkali dosing device includes a liquid alkali storage tank, a liquid alkali pump and a pH feedback meter; the liquid alkali storage tank is connected to the homogenizing stirring tank body through a pipeline provided with a liquid alkali pump, and a pH feedback meter for reading the pH value of the liquid is provided inside the homogenizing stirring tank body.

[0013] Preferably, the hydrolysis acidification tank comprises a hydrolysis acidification tank feed inlet, a hydrolysis acidification tank body, an internal circulation device, a mud discharge port and a hydrolysis acidification tank discharge port; a hydrolysis acidification tank feed inlet is provided at the lower part of one side wall of the hydrolysis acidification tank body, a hydrolysis acidification tank discharge port is provided at the upper part of the other side wall, a mud discharge port is provided at the bottom, and an internal circulation device is provided inside.

[0014] Furthermore, the inlet of the internal circulation device is connected to the middle and upper part of the inner cavity of the hydrolysis acidification tank, and the outlet is connected to the water distribution pipe arranged at the bottom of the inner cavity, so as to realize the upward and downward circulation of the internal liquid.

[0015] Preferably, the flotation machine comprises a flotation machine feed port, a flotation machine body, a flotation machine mud discharge port and a flotation machine discharge port; a flotation machine feed port is provided on one side of the flotation machine body, a flotation machine discharge port is provided on the other opposite side, and a flotation machine mud discharge port is provided at the bottom.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1) The utility model proposes for the first time to use leachate from kitchen waste as a raw material to prepare a carbon source, which can effectively decompose the refractory organic matter in the leachate into a carbon source that is easily utilized by organisms, thereby improving the resource utilization rate of the leachate;

[0018] 2) Appropriate temperature and pH value are key parameters for the preparation of high-quality carbon sources. In the present invention, temperature adjustment and pH value adjustment devices are provided to ensure the stable operation of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The schematic diagram of the structure of the device for preparing carbon source from leachate of kitchen waste;

[0020] Figure 2 It is a schematic diagram of the structure of a food waste leachate storage tank;

[0021] Figure 3 It is a structural schematic diagram of a homogenizing mixing tank;

[0022] Figure 4 It is a structural schematic diagram of the hydrolysis acidification tank.

[0023] The accompanying drawings are marked as follows: kitchen waste leachate storage tank 1, reaction stirring tank 2, homogenization stirring tank 3, hydrolysis acidification tank 4, solid-liquid separation device 5, air flotation machine 6, fermentation liquid storage tank 7, electrical control cabinet 8, leachate feed port 9, leachate storage tank body 10, internal partition 11, oil discharge port 12, slag discharge port 13, grease recovery barrel 14, leachate lifting pump 15, reaction stirring tank feed port 16, reaction stirring tank body 17, reaction stirring tank stirring device 18, reaction stirring The tank discharge port 19, the hydrolase dosing device 20, the homogenizing stirring tank feed port 21, the homogenizing stirring tank body 22, the homogenizing stirring tank stirring device 23, the heating device 24, the homogenizing stirring tank discharge port 25, the liquid alkali dosing device 26, the hydrolysis acidification tank feed port 27, the hydrolysis acidification tank body 28, the internal circulation device 29, the mud discharge port 30, the hydrolysis acidification tank discharge port 31, the flotation machine feed port 32, the flotation machine body 33, the flotation machine mud discharge port 34, and the flotation machine discharge port 35. DETAILED DESCRIPTION

[0024] The present invention is further described and illustrated below in conjunction with the accompanying drawings and specific implementations. The technical features of each implementation of the present invention can be combined accordingly without conflicting with each other.

[0025] like Figure 1 As shown, a device for preparing a carbon source from kitchen waste leachate provided by the utility model is provided, and the device mainly comprises a kitchen waste leachate storage tank 1, a reaction stirring tank 2, a homogenizing stirring tank 3, a hydrolysis acidification tank 4, a solid-liquid separation device 5, an air flotation machine 6, a fermentation liquid storage tank 7 and an electrical control cabinet 8.

[0026] The structure and connection method of each component will be described in detail below.

[0027] In the utility model, the leachate outlet of the kitchen waste leachate storage tank 1 is connected to the reaction stirring tank feed port 16 of the reaction stirring tank 2 through a pipeline.

[0028] As a preferred embodiment of the present invention, Figure 2As shown, the food waste leachate storage tank 1 mainly includes a leachate feed port 9, a leachate storage tank body 10, an internal partition 11, an oil discharge port 12, a slag discharge port 13, a grease recovery barrel 14 and a leachate lifting pump 15. Among them, a leachate feed port 9 is opened in the middle of one side wall of the leachate storage tank body 10, and a leachate outlet is opened in the middle of the other side wall of the opposite side. The leachate outlet is connected to the reaction stirring tank 2 through a pipeline provided with a leachate lifting pump 15. Two vertical internal partitions 11 are provided inside the leachate storage tank body 10 along the fluid flow direction. The two internal partitions 11 divide the inner cavity of the leachate storage tank body 10 into three series areas (i.e., the first area, the second area and the third area), and the adjacent areas are connected through a guide pipe. Specifically, the water inlet of the guide pipe is located at an upper position on the bottom of the leachate storage tank body 10, and the water outlet is located at a lower position on the top of the leachate storage tank body 10, so that the leachate flows from the lower layer of the front area to the upper layer of the rear area. The oil discharge port 12 is respectively opened in two areas (i.e., the first area and the second area) of the leachate storage tank body 10 located upstream, and the center height position is flush with the water level line, mainly used to discharge the grease separated by gravity in the two areas. Each oil discharge port 12 is connected to the grease recovery barrel 14 through a pipeline. The slag discharge port 13 is respectively opened in three areas (i.e., the first area, the second area and the third area) of the leachate storage tank body 10, and the center height position is close to the bottom, mainly used to discharge the solid slag separated by gravity in the leachate storage tank 1.

[0029] In the utility model, a hydrolase dosing device 20 is provided on the top of the reaction stirring tank 2, and the reaction stirring tank discharge port 19 of the reaction stirring tank 2 is connected with the homogenizing stirring tank feed port 21 of the homogenizing stirring tank 3 through a pipeline.

[0030] As a preferred embodiment of the utility model, the reaction stirring tank 2 mainly includes a reaction stirring tank feed port 16, a reaction stirring tank body 17, a reaction stirring tank stirring device 18, a reaction stirring tank discharge port 19 and a hydrolase dosing device 20. Among them, a reaction stirring tank feed port 16 is opened at the lower part of one side wall of the reaction stirring tank body 17, a reaction stirring tank discharge port 19 is opened at the upper part of the other side wall of the opposite side, a reaction stirring tank stirring device 18 is arranged inside, and a hydrolase dosing device 20 is connected to the top through a pipeline.

[0031] In the utility model, a liquid alkali dosing device 26 is provided on the top of the homogenizing and stirring tank 3 , and a homogenizing and stirring tank discharge port 25 of the homogenizing and stirring tank 3 is connected with a hydrolysis and acidification tank feed port 27 of the hydrolysis and acidification tank 4 through a pipeline.

[0032] As a preferred embodiment of the present invention, Figure 3As shown, the homogenizing stirring tank 3 mainly includes a homogenizing stirring tank feed port 21, a homogenizing stirring tank body 22, a homogenizing stirring tank stirring device 23, a heating device 24, a homogenizing stirring tank discharge port 25 and a liquid alkali dosing device 26. Among them, a homogenizing stirring tank feed port 21 is provided at the lower part of one side wall of the homogenizing stirring tank body 22, a homogenizing stirring tank discharge port 25 is provided at the upper part of the other side wall opposite to the homogenizing stirring tank body 22, a homogenizing stirring tank stirring device 23 is provided inside, a heating device 24 is provided around the side wall, and a liquid alkali dosing device 26 is connected to the top through a pipeline.

[0033] Specifically, the heating device 24 adopts electric heating and is equipped with a temperature feedback instrument, and the temperature control range is 60-80°C.

[0034] Specifically, the caustic soda dosing device 26 includes a caustic soda storage tank, a caustic soda pump and a pH feedback meter. The caustic soda storage tank is connected to the homogenizing stirring tank body 22 through a pipeline provided with a caustic soda pump, and a pH feedback meter for reading the pH value of the liquid is provided inside the homogenizing stirring tank body 22.

[0035] In the present invention, the hydrolysis-acidification tank discharge port 31 of the hydrolysis-acidification tank 4 is communicated with the air flotation machine feed port 32 of the air flotation machine 6 through a pipeline.

[0036] As a preferred embodiment of the present invention, Figure 4 As shown, the hydrolysis acidification tank 4 mainly includes a hydrolysis acidification tank feed port 27, a hydrolysis acidification tank body 28, an internal circulation device 29, a mud discharge port 30 and a hydrolysis acidification tank discharge port 31. Among them, the hydrolysis acidification tank feed port 27 is opened at the lower part of one side wall of the hydrolysis acidification tank body 28, the hydrolysis acidification tank discharge port 31 is opened at the upper part of the other side wall, the mud discharge port 30 is opened at the bottom, and the internal circulation device 29 is arranged inside.

[0037] Specifically, the inlet of the internal circulation device 29 is connected to the middle and upper part of the inner cavity of the hydrolysis acidification tank body 28, and the outlet is connected to the water distribution pipe arranged at the bottom of the inner cavity, so as to realize the upward and downward circulation of the internal liquid.

[0038] In the present invention, the discharge port of the air flotation machine 6 is connected to the fermentation liquid storage tank 7 through a pipeline.

[0039] As a preferred embodiment of the present invention, the air flotation machine 6 mainly includes an air flotation machine feed port 32, an air flotation machine body 33, an air flotation machine mud discharge port 34 and an air flotation machine discharge port 35. The air flotation machine feed port 32 is provided on one side of the air flotation machine body 33, the air flotation machine discharge port 35 is provided on the other side opposite thereto, and the air flotation machine mud discharge port 34 is provided at the bottom.

[0040] In the present utility model, the slag discharge port 13 at the bottom of the food waste leachate storage tank 1, the mud discharge port 30 at the bottom of the hydrolysis acidification tank 4, and the air floatation machine mud discharge port 34 at the bottom of the air floatation machine 6 are all connected to the solid-liquid separation device 5 through pipelines, and the upper liquid separated by the solid-liquid separation device 5 is connected to the leachate feed port 9 of the food waste leachate storage tank 1 through pipelines. All the electric control machines and instruments in the food waste leachate storage tank 1, the reaction stirring tank 2, the homogenization stirring tank 3, the hydrolysis acidification tank 4, the solid-liquid separation device 5, the air floatation machine 6, and the fermentation liquid storage tank 7 are connected to the electric control cabinet 8 and controlled.

[0041] Based on the structure of the above-mentioned device for preparing carbon source from kitchen waste leachate, the specific method of using the device is as follows:

[0042] Step (1) Removing oil and residue from kitchen waste leachate:

[0043] After the kitchen waste is crushed and dehydrated, the leachate is collected and enters the kitchen waste leachate storage tank 1 through the leachate feed port 9. Through the gravity separation action in the three series-connected areas, the three-phase separation of grease, water and solid residue is achieved, wherein the upper layer of grease enters the grease recovery barrel 14 through the oil discharge port 12, and the lower layer of solid residue enters the solid-liquid separation device 5 through the residue discharge port 13 for mechanical dehydration treatment. The dehydrated solid residue returns to the front-end kitchen waste treatment system, and the dehydrated liquid is collected and returned to the kitchen waste leachate storage tank 1.

[0044] Step (2) Enzymatic pretreatment of kitchen waste leachate:

[0045] By adding a complex enzyme composed of protease and lipase to the food waste leachate treated in step (1), and carrying out an enzymatic hydrolysis reaction for 2 hours under the stirring of the stirring device 18, it is possible to effectively decompose the difficult-to-degrade organic matter such as protein and fat in the food waste leachate and convert it into VFAs that are more easily bioavailable. On the one hand, the reaction time of subsequent hydrolysis and acidification can be shortened. On the other hand, under the action of lipase, the inhibitory effect of subsequent fat substances on microorganisms in the hydrolysis and acidification process is avoided.

[0046] Step (3) Homogenization of kitchen waste leachate:

[0047] The food waste leachate treated in step (2) is heated to 80° C. in the homogenizing stirring tank 3 by the heating device 24 for inactivation, which can effectively prevent the influence of the hydrolase on the subsequent reaction. At the same time, liquid alkali is added to the homogenizing stirring tank 3 to adjust the pH value of the food waste leachate to 7-8.

[0048] Step (4) hydrolysis and acidification:

[0049] The food waste leachate treated in step (3) is sent to the hydrolysis acidification tank 4. In an anaerobic environment, the residual refractory organic matter in the landfill leachate is further converted into volatile fatty acids (VFAs) through the stirring action of the internal circulation device 29 of the hydrolysis acidification tank 4. At the same time, the pH value adjusted to 10 can effectively inhibit the activity of methanogens, thereby avoiding the carbon source being further converted into methane and causing waste of carbon source.

[0050] Step (5) solid-liquid separation:

[0051] The residual sludge produced in step (4) is combined with the solid residue produced in other steps and enters the solid-liquid separation device 5 for mechanical extrusion separation. The separated solid residue is returned to the front end and mixed with the food waste for harmless treatment. The separated liquid phase is collected and returned to the food waste leachate storage tank 1.

[0052] Step (6) Fermentation broth collection:

[0053] The hydrolyzed acidified fermentation liquid produced in step (4) is sent to the flotation machine 6, and the residual difficult-to-degrade organic matter, suspended matter and colloid in the fermentation liquid are separated into liquid phase by flotation to ensure that the final fermentation liquid is clear and free of impurities. Then the water outlet of the flotation machine enters the fermentation liquid storage tank 7, and the impurities separated by the flotation machine 6 enter the solid-liquid separation device 5.

[0054] The device of the utility model adopts a split series structure, an external hydrolase dosing device and an electrical control cabinet to realize the automatic control of the whole device, improve the reaction rate in the device, and reduce the equipment volume and floor space. The utility model proposes for the first time to prepare the leachate of kitchen waste into a carbon source, which can realize the harmless disposal of the leachate of kitchen waste on the one hand, and the resource utilization of the leachate of kitchen waste on the other hand, and reduce the dosage of chemical carbon sources in the relevant sewage treatment process, which has good economic and environmental benefits.

[0055] The above-described embodiment is only a preferred solution of the present invention, but it is not intended to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A device for preparing a carbon source from kitchen waste leachate, characterized in that: It comprises a kitchen waste leachate storage tank (1), a reaction stirring tank (2), a homogenization stirring tank (3), a hydrolysis acidification tank (4), a solid-liquid separation device (5), an air flotation machine (6), a fermentation liquid storage tank (7) and an electrical control cabinet (8); The leachate outlet of the food waste leachate storage tank (1) is connected to the reaction stirring tank feed port (16) of the reaction stirring tank (2) through a pipeline, and a hydrolase dosing device (20) is provided on the top of the reaction stirring tank (2); the reaction stirring tank discharge port (19) of the reaction stirring tank (2) is connected to the homogenizing stirring tank feed port (21) of the homogenizing stirring tank (3) through a pipeline, and a liquid alkali dosing device (26) is provided on the top of the homogenizing stirring tank (3); the homogenizing stirring tank discharge port (25) of the homogenizing stirring tank (3) is connected to the hydrolysis acidification tank feed port (27) of the hydrolysis acidification tank (4) through a pipeline, and the hydrolysis acidification tank discharge port (31) of the hydrolysis acidification tank (4) is connected to the flotation machine feed port (32) of the flotation machine (6) through a pipeline, and the flotation machine (6) ) is connected to the fermentation liquid storage tank (7) through a pipeline; the slag discharge port (13) at the bottom of the food waste leachate storage tank (1), the mud discharge port (30) at the bottom of the hydrolysis acidification tank (4) and the mud discharge port (34) at the bottom of the flotation machine (6) are all connected to the solid-liquid separation device (5) through pipelines, and the upper liquid separated by the solid-liquid separation device (5) is connected to the leachate feed port (9) of the food waste leachate storage tank (1) through a pipeline; all the electric control machines and instruments in the food waste leachate storage tank (1), the reaction stirring tank (2), the homogenizing stirring tank (3), the hydrolysis acidification tank (4), the solid-liquid separation device (5), the flotation machine (6) and the fermentation liquid storage tank (7) are connected to the electric control cabinet (8) and controlled.

2. The device for preparing carbon source from kitchen waste leachate according to claim 1, characterized in that: The kitchen waste leachate storage tank (1) comprises a leachate feed port (9), a leachate storage tank body (10), an internal partition (11), an oil discharge port (12), a slag discharge port (13), a grease recovery barrel (14) and a leachate lifting pump (15); a leachate feed port (9) is provided in the middle of one side wall of the leachate storage tank body (10), and a leachate outlet is provided in the middle of the other side wall opposite thereto, and the leachate outlet is connected to the reaction stirring tank (2) through a pipeline provided with the leachate lifting pump (15); the leachate storage tank body (10) is provided with a leachate feed port (9) and a leachate outlet is provided in the middle of the other side wall. A vertical internal partition (11) is provided inside the body (10) along the fluid flow direction to divide the inner cavity into three series-connected areas, and adjacent areas are connected by a guide pipe; the oil discharge port (12) is respectively opened in two areas upstream of the leachate storage tank body (10), and the center height position is flush with the water level lines of the two areas; each oil discharge port (12) is connected to a grease recovery barrel (14) through a pipeline; the slag discharge port (13) is respectively opened in three areas of the leachate storage tank body (10), and the center height position is close to the bottom.

3. The device for preparing carbon source from kitchen waste leachate according to claim 2, characterized in that: The water inlet of the guide pipe is located at an upper position on the bottom of the leachate storage tank body (10), and the water outlet is located at a lower position on the top of the leachate storage tank body (10), so that the leachate flows from the lower layer of the front area to the upper layer of the rear area.

4. The device for preparing carbon source from kitchen waste leachate according to claim 1, characterized in that: The reaction stirring tank (2) comprises a reaction stirring tank feed port (16), a reaction stirring tank body (17), a reaction stirring tank stirring device (18), a reaction stirring tank discharge port (19) and a hydrolase dosing device (20); the reaction stirring tank feed port (16) is provided at the lower part of one side wall of the reaction stirring tank body (17), the reaction stirring tank discharge port (19) is provided at the upper part of the other side wall opposite to the reaction stirring tank body (17), the reaction stirring tank stirring device (18) is provided inside, and the hydrolase dosing device (20) connected through a pipeline is provided at the top.

5. The device for preparing carbon source from kitchen waste leachate according to claim 1, characterized in that: The homogenizing stirring tank (3) comprises a homogenizing stirring tank feed port (21), a homogenizing stirring tank body (22), a homogenizing stirring tank stirring device (23), a heating device (24), a homogenizing stirring tank discharge port (25) and a liquid alkali dosing device (26); the homogenizing stirring tank feed port (21) is provided at the lower part of one side wall of the homogenizing stirring tank body (22), the homogenizing stirring tank discharge port (25) is provided at the upper part of the other side wall opposite to the homogenizing stirring tank body (22), the homogenizing stirring tank stirring device (23) is provided inside, the heating device (24) is provided around the side wall, and the liquid alkali dosing device (26) connected through a pipeline is provided at the top.

6. The device for preparing carbon source from kitchen waste leachate according to claim 5, characterized in that: The heating device (24) adopts electric heating and is equipped with a temperature feedback instrument, and the temperature control range is 60-80°C.

7. The device for preparing carbon source from kitchen waste leachate according to claim 5, characterized in that: The liquid alkali dosing device (26) comprises a liquid alkali storage tank, a liquid alkali pump and a pH value feedback meter; the liquid alkali storage tank is connected to the homogenizing stirring tank body (22) via a pipeline provided with the liquid alkali pump, and a pH value feedback meter for reading the pH value of the liquid is provided inside the homogenizing stirring tank body (22).

8. The device for preparing carbon source from kitchen waste leachate according to claim 1, characterized in that: The hydrolysis acidification tank (4) comprises a hydrolysis acidification tank feed port (27), a hydrolysis acidification tank body (28), an internal circulation device (29), a mud discharge port (30) and a hydrolysis acidification tank discharge port (31); the hydrolysis acidification tank body (28) is provided with a hydrolysis acidification tank feed port (27) at the lower part of one side wall surface, a hydrolysis acidification tank discharge port (31) at the upper part of the other side wall surface opposite to the hydrolysis acidification tank body, a mud discharge port (30) at the bottom, and an internal circulation device (29) is provided inside.

9. The device for preparing carbon source from kitchen waste leachate according to claim 8, characterized in that: The inlet of the internal circulation device (29) is connected to the middle and upper part of the inner cavity of the hydrolysis and acidification tank body (28), and the outlet is connected to the water distribution pipe arranged at the bottom of the inner cavity, so as to realize the upward and downward circulation of the internal liquid.

10. The device for preparing carbon source from kitchen waste leachate according to claim 1, characterized in that: The flotation machine (6) comprises an air flotation machine feed port (32), an air flotation machine body (33), an air flotation machine mud discharge port (34) and an air flotation machine discharge port (35); the air flotation machine feed port (32) is provided on one side of the air flotation machine body (33), the air flotation machine discharge port (35) is provided on the other side opposite thereto, and the air flotation machine mud discharge port (34) is provided at the bottom.

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