Method for recycling kitchen waste and municipal sludge

Abstract

The invention provides a kitchen waste cooperated municipal sludge recycling method, which comprises: carrying out organic-inorganic separation on municipal sludge to obtain organic sludge and inorganic sludge, carrying out dehydration treatment on the inorganic sludge to obtain a dehydrated clear liquid of the inorganic sludge, and further obtaining a mixture of the dehydrated clear liquid and the organic sludge, which is marked as a first mixture; performing impurity separation on the kitchen waste to obtain slurry of the kitchen waste, performing three-phase separation on the slurry to obtain a solid phase and a liquid phase of the slurry, and recording the solid phase and the liquid phase as a second mixture; the first mixture and the second mixture are mixed according to a first preset proportion to obtain a third mixture, the third mixture is subjected to hydrolytic acidification, and an organic carbon source product is formed after filtration, so that the VFA component in the organic carbon source after hydrolytic acidification is remarkably improved, the denitrification capacity of the carbon source is improved, and the denitrification efficiency of the carbon source is improved. While the sludge and the kitchen waste are greatly reduced, the resource utilization of the organic matters is further realized.

Description

Technical Field

[0001] The invention relates to the technical field of resource utilization of restaurant kitchen waste and municipal sludge, and in particular to a method for resource utilization of restaurant kitchen waste and municipal sludge. Background Art

[0002] With the acceleration of urbanization, the amount of municipal sludge and food waste is increasing, and the treatment of municipal sludge and food waste has become an environmental problem that needs to be solved urgently. Traditional municipal sludge treatment methods often lack the deep utilization of its effective components, and only carry out simple dehydration and transportation, without fully tapping the value of organic matter. Food waste also faces the problem of improper treatment, which causes waste of resources on the one hand and may pollute the environment on the other hand. In the field of sewage treatment, external carbon sources are required to meet the metabolic needs of microorganisms, such as commonly used carbon sources such as sodium acetate and methanol. However, the acquisition and use of these traditional carbon sources have certain costs and environmental impacts. In the current technology, there is a lack of a method for synergistic treatment of municipal sludge and food waste, which can not only achieve a significant reduction in the amount of both, but also efficiently utilize the organic matter in them to produce high-quality organic carbon sources. The existing treatment process fails to fully consider the combined utilization of the characteristics of sludge and food waste.

[0003] Therefore, the prior art needs to be further developed. Summary of the invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies and provide a method for the resource utilization of kitchen waste and municipal sludge to solve the problems existing in the prior art.

[0005] In order to achieve the above technical objectives, the present invention provides a method for resource utilization of kitchen waste and municipal sludge, comprising: S100, performing organic-inorganic separation on municipal sludge to obtain organic sludge and inorganic sludge, dehydrating the inorganic sludge to obtain dehydrated clear liquid of the inorganic sludge, and further obtaining a mixture of the dehydrated clear liquid and the organic sludge, which is recorded as a first mixture; S200, separating impurities from the food waste to obtain a slurry of the food waste, and performing three-phase separation on the slurry to obtain a solid phase and a liquid phase of the slurry, which are recorded as a second mixture; S300, mixing the first mixture and the second mixture in a first preset ratio to obtain a third mixture, hydrolyzing and acidifying the third mixture, and filtering the third mixture to form an organic carbon source product.

[0006] Specifically, the S100 includes: The municipal sludge is separated into organic and inorganic parts by using an organic-inorganic separation device to obtain inorganic sludge and organic sludge, and the inorganic sludge is dehydrated by using a dehydration device to obtain dehydrated clear liquid and mud cake of the inorganic sludge.

[0007] Specifically, the S100 further includes: The mud cake is transported out for disposal, and the dewatered clear liquid of the inorganic sludge and the organic sludge are put into a first mixing device for mixing to obtain a first mixture.

[0008] Specifically, the impurities are separated from the kitchen waste to obtain a slurry of the kitchen waste, including: The kitchen waste is transported to a hydraulic pulper for pulping, and a first slurry and a first solid residue of the kitchen waste are obtained after pulping. The first slurry is directly transported to an impurity separator.

[0009] Specifically, the method further includes: The first solid residue of the pulped food waste is squeezed and dehydrated to obtain a dehydrated second solid residue and a filtrate, and the filtrate is transported to an impurity separator to separate impurities together with the first slurry to obtain a slurry of food waste.

[0010] Specifically, the method further includes: After the impurities are separated from the filtrate and the first slurry, a third solid residue of kitchen waste is obtained, and the second solid residue and the third solid residue are transported out for disposal.

[0011] Specifically, the method of conveying the food waste to a hydraulic pulping machine for pulping includes: Magnetic separation is used to remove iron from food waste during the process of conveying the food waste to the hydraulic pulper.

[0012] Specifically, the three-phase separation of the slurry to obtain a solid phase and a liquid phase of the slurry, recorded as a second mixture, includes: The slurry of food waste produced by the impurity separator is heated and then transported to a three-phase separator for three-phase separation to obtain fat, solid phase and liquid phase of the slurry, and the mixture formed by the solid phase and the liquid phase is recorded as the second mixture.

[0013] Specifically, the S300 includes: The first mixture and the second mixture are conveyed to a second mixing device and mixed according to a first preset ratio to obtain a third mixture, and then the third mixture is conveyed to an integrated hydrolysis and acidification device for hydrolysis and acidification to obtain a second slurry, and the second slurry is filtered through an ultrafiltration membrane in a filtrate tank to form an organic carbon source.

[0014] Specifically, the second mixing device is provided with a stirring device and an ultrasonic generator; The hydrolysis-acidification integrated device is provided with a mechanical stirring device, and the hydrolysis-acidification integrated device controls the temperature of the hydrolysis-acidification to be within a first preset temperature range.

[0015] Beneficial effects: The present invention performs organic-inorganic separation on municipal sludge to obtain organic sludge and inorganic sludge, dehydrates the inorganic sludge to obtain dehydrated clear liquid of the inorganic sludge, and then obtains a mixture of the dehydrated clear liquid and the organic sludge, which is recorded as a first mixture; performs impurity separation on food waste to obtain food waste slurry, and performs three-phase separation on the slurry to obtain a solid phase and a liquid phase of the slurry, which is recorded as a second mixture; the first mixture and the second mixture are mixed according to a first preset ratio to obtain a third mixture, and the third mixture is hydrolyzed and acidified, and an organic carbon source product is formed after filtering, which significantly increases the VFA component in the organic carbon source and improves the denitrification capacity of the carbon source. While achieving a significant reduction in sludge and food waste, the resource utilization of organic matter is further achieved, and the generated crude oil can be sold as a biodiesel raw material, and the generated organic carbon source can replace conventional carbon sources such as sodium acetate and methanol in sewage treatment plants, which greatly improves the resource utilization of food waste and the coordinated carbon reduction of sewage treatment plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a flow chart of a method for resource utilization of kitchen waste and municipal sludge provided in a specific embodiment of the present invention; Figure 2 It is a schematic diagram of the processing process of food waste and municipal sludge resource utilization provided in a specific embodiment of the present invention. DETAILED DESCRIPTION In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should all fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional words used are used to illustrate rather than limit the invention.

[0017] The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0018] See also Figure 1 This embodiment provides a method for resource utilization of kitchen waste and municipal sludge, including: S100, performing organic-inorganic separation on municipal sludge to obtain organic sludge and inorganic sludge, dehydrating the inorganic sludge to obtain dehydrated clear liquid of the inorganic sludge, and further obtaining a mixture of the dehydrated clear liquid and the organic sludge, which is recorded as a first mixture; It should be noted here that the first preset ratio and the first preset temperature range are pre-set before step S100. It can be understood that the present invention does not limit the specific values ​​of the first preset ratio and the first preset temperature range, as long as the method for coordinated resource utilization of kitchen waste and municipal sludge proposed by the present invention can be applied. Preferably, the present invention sets the first preset ratio to 3:7, and sets the first preset temperature range to 30-37°C. The setting of the above-mentioned first preset ratio can make the organic matter content of the sludge and the kitchen waste relatively balanced. This balance can provide a more comprehensive carbon source type, meet the needs of microorganisms for different types of organic matter in subsequent treatment processes, and be beneficial to the growth and metabolism of microorganisms, thereby improving the quality of the carbon source. The setting of the above-mentioned first preset temperature range can be suitable for the growth and reproduction of hydrolytic acidifying microorganisms. Within this temperature range, the enzyme activity in the hydrolytic acidifying microorganisms is relatively high, and various biochemical reactions can be effectively catalyzed, thereby obtaining hydrolytic acidifying products of better quality and improving the reaction efficiency.

[0019] It is understandable that the organic sludge in the municipal sludge contains rich organic matter. After organic-inorganic separation, the organic sludge can be treated separately, which is conducive to the subsequent resource utilization of the organic sludge and avoids the interference that may be caused by the mixed treatment with the inorganic sludge. The dehydrated clear liquid obtained after the inorganic sludge is dehydrated is mixed with the organic sludge to form a first mixture. The dehydrated clear liquid generated in the dehydration process of the inorganic sludge may contain some usable substances. Mixing it with the organic sludge can reduce the cost of treating the dehydrated clear liquid separately on the one hand, and on the other hand, the substances in the clear liquid can be reasonably converted or utilized in the subsequent treatment of the first mixture, thereby improving the resource recovery rate in the entire sludge treatment process.

[0020] Specifically, the S100 includes: The municipal sludge is separated into organic and inorganic parts by using an organic-inorganic separation device to obtain inorganic sludge and organic sludge, and the inorganic sludge is dehydrated by using a dehydration device to obtain dehydrated clear liquid and mud cake of the inorganic sludge.

[0021] Specifically, the S100 further includes: The mud cake is transported out for disposal, and the dewatered clear liquid of the inorganic sludge and the organic sludge are put into a first mixing device for mixing to obtain a first mixture.

[0022] In some specific embodiments, the mud cake obtained after dehydration of the inorganic sludge contains a certain amount of inorganic components, such as clay substances, minerals, etc. These ingredients can be used as one of the raw materials for making bricks. After the mud cake is transported to the brick factory, it can be made into building bricks after proper treatment, such as crushing and mixing with other additives (such as appropriate amounts of sand, lime, etc.); mud cake can also be used in the construction of road base. After compaction and other treatments, it can be used as a filling material for the road base, which can reduce the dependence on natural aggregates in road construction, realize waste utilization, and reduce road construction costs; mud cake can also be transported to a special sanitary landfill for landfill disposal. Before landfilling, the properties of the mud cake (such as heavy metal content, moisture content, etc.) need to be evaluated. If the content of harmful substances in the mud cake is within an acceptable range, it will be buried in a landfill pit that has been treated with waterproofing, and then covered to prevent problems such as rainwater erosion and odor emission; mud cake can also be used as a covering material for landfills. After proper treatment, such as simple drying to reduce the moisture content, the mud cake can be transported to the landfill as a covering material for use.

[0023] S200, separating impurities from the food waste to obtain a slurry of the food waste, and performing three-phase separation on the slurry to obtain a solid phase and a liquid phase of the slurry, which are recorded as a second mixture.

[0024] It is understandable that the composition of the food waste slurry after the impurities are removed is relatively simpler. In the subsequent three-phase separation and other treatment processes, the operating burden of the equipment is reduced. The removal of impurities helps to improve the purity of the final recycled resources. If the impurities are mixed in the slurry and enter the three-phase separation stage, they may be mixed into the solid phase or liquid phase, affecting the purity of the subsequent extraction of useful substances from the solid phase and liquid phase. The solid phase and liquid phase (second mixture) obtained by three-phase separation provide conditions for further resource recovery. The solid phase still contains some organic matter, which can be used as a resource; the liquid phase contains water and other soluble substances. After the slurry is separated into three phases, the originally complex mixed system is simplified into a relatively simple solid phase and liquid phase.

[0025] Specifically, the impurities are separated from the kitchen waste to obtain a slurry of the kitchen waste, including: The kitchen waste is transported to a hydraulic pulper for pulping, and a first slurry and a first solid residue of the kitchen waste are obtained after pulping. The first slurry is directly transported to an impurity separator.

[0026] Specifically, the method further includes: The first solid residue of the pulped food waste is squeezed and dehydrated to obtain a dehydrated second solid residue and a filtrate, and the filtrate is transported to an impurity separator to separate impurities together with the first slurry to obtain a slurry of food waste.

[0027] Specifically, the method further includes: After the impurities are separated from the filtrate and the first slurry, a third solid residue of kitchen waste is obtained, and the second solid residue and the third solid residue are transported out for disposal.

[0028] In some specific embodiments, the solid residue after extrusion dehydration (second solid residue) mainly comes from the solid residue after pulping through the extrusion dehydration process. This part of the solid residue may contain more fiber-like substances originally in the food waste, because these fiber structures are not easy to be completely destroyed during the pulping process, and will be retained in the solid residue during extrusion dehydration. The solid residue (third solid residue) produced by the impurity separator is produced during the impurity separation process between the filtrate and the slurry obtained by pulping. It may contain more impurity components, such as small ironware that is not completely removed by magnetic separation, some non-magnetic metal impurities, plastic fragments mixed in the food waste or other insoluble solid debris. The solid residue after extrusion dehydration has a relatively low moisture content due to pulping and extrusion dehydration, and can be transported to an incineration plant for incineration.

[0029] Specifically, the method of conveying the food waste to a hydraulic pulping machine for pulping includes: Magnetic separation is used to remove iron from food waste during the process of conveying the food waste to the hydraulic pulper.

[0030] Specifically, the three-phase separation of the slurry to obtain a solid phase and a liquid phase of the slurry, recorded as a second mixture, includes: The slurry of food waste produced by the impurity separator is heated and then transported to a three-phase separator for three-phase separation to obtain fat, solid phase and liquid phase of the slurry, and the mixture formed by the solid phase and the liquid phase is recorded as the second mixture.

[0031] In some specific embodiments, the slurry of food waste produced by the impurity separator is heated by steam or hot water; the oil separated by the three-phase separator can be exported and sold as a biodiesel raw material, which greatly improves the economic and environmental benefits of this solution.

[0032] S300, mixing the first mixture and the second mixture in a first preset ratio to obtain a third mixture, hydrolyzing and acidifying the third mixture, and filtering the third mixture to form an organic carbon source product.

[0033] It should be noted here that by performing organic-inorganic separation on municipal sludge to obtain a first mixture, and then mixing it with a second mixture of treated food waste in a certain proportion, the VFA component in the organic carbon source after hydrolysis and acidification can be significantly increased, thereby improving the denitrification capacity of the carbon source.

[0034] Specifically, the S300 includes: The first mixture and the second mixture are conveyed to a second mixing device and mixed according to a first preset ratio to obtain a third mixture, and then the third mixture is conveyed to an integrated hydrolysis and acidification device for hydrolysis and acidification to obtain a second slurry, and the second slurry is filtered through an ultrafiltration membrane in a filtrate tank to form an organic carbon source.

[0035] In some specific embodiments, the first mixing device and the second mixing device can be one or two. The present invention preferably uses two mixing devices. The advantage of using two mixing devices is that the mixing ratio of the first mixture and the second mixture can be adjusted.

[0036] Specifically, the second mixing device is provided with a stirring device and an ultrasonic generator; The hydrolysis-acidification integrated device is provided with a mechanical stirring device, and the hydrolysis-acidification integrated device controls the temperature of the hydrolysis-acidification to be within a first preset temperature range.

[0037] It can be understood that the use of ultrasound to treat the mixed material can significantly improve the hydrolysis and acidification performance of the material; the temperature of the solid and liquid phases separated by the three-phase separator is 70-80°C, and the temperature of hydrolysis and acidification is 30-37°C, and after mixing with the municipal sludge at a temperature of 15-25°C, it basically does not need to be cooled down before entering the hydrolysis and acidification integrated device; the hydrolysis and acidification integrated device has the advantage of a short residence time. In the absence of adding bacterial agents, the residence time is 12-24h, which greatly reduces the scale of the reactor and effectively reduces the cost of the equipment; the second slurry after hydrolysis and acidification is filtered using an ultrafiltration membrane, and the obtained organic carbon source is a clear liquid with basically 0 suspended solids (SS), a carbon-nitrogen ratio of up to 30-50, and a volatile fatty acid (VFA) content of more than 70%. The generated organic carbon source can replace conventional carbon sources such as sodium acetate and methanol in sewage treatment plants, thereby realizing the resource utilization of food waste and the coordinated carbon reduction of sewage treatment plants.

[0038] In some specific embodiments, the first mixture and the second mixture are controlled at 1:1-1:5, preferably 3:7, in order to obtain a higher quality carbon source. A stirring device and an ultrasonic generator are set in the second mixing device to destroy the cell wall and cell membrane of the organic matter, so that the organic matter is easier to hydrolyze and acidify, and then enter the hydrolysis and acidification integrated device. The hydrolysis and acidification integrated device is provided with a mechanical stirring device, the temperature is controlled at 30-37°C, and a polymer filler is added as a microbial carrier to hydrolyze and acidify the organic matter in the kitchen waste. The hydrolysis and acidification integrated device has automatic slag discharge and coarse filtration functions. Large-particle inorganic and organic matter that are not decomposed by microorganisms are automatically discharged from the device regularly and dehydrated together with the front-end inorganic sludge dehydration device. The decomposed slurry (second slurry) enters the filtrate tank, and is filtered through an ultrafiltration membrane to form an organic carbon source. The suspension intercepted by the ultrafiltration membrane continues to enter the hydrolysis and acidification integrated device.

[0039] See also Figure 2 The working principle of the present invention is described below by using specific examples: Step 1: Municipal sludge (80%) enters the organic-inorganic separation device to obtain inorganic sludge and organic sludge. The inorganic sludge enters the dehydration device for dehydration, the mud cake is transported out for disposal, and the dehydrated clear liquid and organic sludge enter the mixing device; Step 2: The kitchen waste enters the hydraulic pulping machine, and magnetic separation is used to remove iron during the transportation process. The solid residue after pulping enters the extrusion dehydration, and the filtrate after dehydration and the pulping slurry enter the impurity separator. The solid residue produced by the impurity separator and the solid residue after extrusion dehydration are transported out for disposal. The slurry produced by the impurity separator enters the three-phase separator after heating, and the oil is transported out for sale. The solid phase and liquid phase enter the mixing device; Step 3: After the front-end treatment, the sludge and kitchen waste enter the mixing device and are controlled at 1:1-1:5, preferably 3:7, in order to obtain a higher quality carbon source. A stirring device and an ultrasonic generator are set in the mixer to destroy the cell wall and cell membrane of the organic matter, so that the organic matter is easier to hydrolyze and acidify, and then enter the hydrolysis and acidification integrated device. The integrated device is equipped with a mechanical stirring device, the temperature is controlled at 30-37°C, and a polymer filler is added as a microbial carrier to hydrolyze and acidify the organic matter in the kitchen waste. The hydrolysis and acidification integrated device has automatic slag discharge and coarse filtration functions. Large-particle inorganic and organic matter that are not decomposed by microorganisms are automatically discharged from the device regularly and dehydrated together with the front-end inorganic sludge dewatering machine. The decomposed slurry enters the filtrate tank and forms an organic carbon source after being filtered by the ultrafiltration membrane. The suspension intercepted by the ultrafiltration membrane continues to enter the hydrolysis and acidification integrated device.

[0040] This example can achieve a significant reduction in sludge and kitchen waste, while realizing the resource utilization of organic matter. The crude oil produced can be sold as a biodiesel raw material, and the organic carbon source produced can replace conventional carbon sources such as sodium acetate and methanol in sewage treatment plants, thereby realizing the resource utilization of kitchen waste and the coordinated carbon reduction of sewage treatment plants.

[0041] It should be noted here that the present invention performs organic-inorganic separation on municipal sludge to obtain organic sludge and inorganic sludge, dehydrates the inorganic sludge to obtain dehydrated clear liquid of the inorganic sludge, and then obtains a mixture of the dehydrated clear liquid and the organic sludge, which is recorded as a first mixture; performs impurity separation on kitchen waste to obtain a slurry of kitchen waste, and performs three-phase separation on the slurry to obtain a solid phase and a liquid phase of the slurry, which is recorded as a second mixture; the first mixture and the second mixture are mixed according to a first preset ratio to obtain a third mixture, the third mixture is hydrolyzed and acidified, and an organic carbon source product is formed after filtration, which significantly increases the VFA component in the organic carbon source and improves the denitrification capacity of the carbon source. While achieving a substantial reduction in sludge and kitchen waste, the resource utilization of organic matter is further realized, and the crude oil produced can be sold as a biodiesel raw material, and the produced organic carbon source can replace conventional carbon sources such as sodium acetate and methanol in sewage treatment plants, which greatly improves the resource utilization of kitchen waste and the synergistic carbon reduction of sewage treatment plants.

[0042] The various technical features described above can be combined arbitrarily. Although all possible combinations of these technical features are not described, any combination of these technical features should be considered to be covered by this specification as long as there is no contradiction in such combination.

[0043] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for resource utilization of kitchen waste and municipal sludge, characterized in that: include: S100, performing organic-inorganic separation on municipal sludge to obtain organic sludge and inorganic sludge, dehydrating the inorganic sludge to obtain dehydrated clear liquid of the inorganic sludge, and further obtaining a mixture of the dehydrated clear liquid and the organic sludge, which is recorded as a first mixture; S200, separating impurities from the food waste to obtain a slurry of the food waste, and performing three-phase separation on the slurry to obtain a solid phase and a liquid phase of the slurry, which are recorded as a second mixture; S300, mixing the first mixture and the second mixture in a first preset ratio to obtain a third mixture, hydrolyzing and acidifying the third mixture, and filtering the third mixture to form an organic carbon source product.

2. The method for resource utilization of kitchen waste and municipal sludge according to claim 1, characterized in that: The S100 includes: The municipal sludge is separated into organic and inorganic parts by using an organic-inorganic separation device to obtain inorganic sludge and organic sludge, and the inorganic sludge is dehydrated by using a dehydration device to obtain dehydrated clear liquid and mud cake of the inorganic sludge.

3. The method for resource utilization of kitchen waste and municipal sludge according to claim 2, characterized in that: The S100 further includes: The mud cake is transported out for disposal, and the dewatered clear liquid of the inorganic sludge and the organic sludge are put into a first mixing device for mixing to obtain a first mixture.

4. The method for resource utilization of kitchen waste and municipal sludge according to claim 1, characterized in that: The method of separating impurities from the kitchen waste to obtain a slurry of the kitchen waste comprises: The kitchen waste is transported to a hydraulic pulper for pulping, and a first slurry and a first solid residue of the kitchen waste are obtained after pulping. The first slurry is directly transported to an impurity separator.

5. The method for resource utilization of kitchen waste and municipal sludge according to claim 4, characterized in that: The method further comprises: The first solid residue of the pulped food waste is squeezed and dehydrated to obtain a dehydrated second solid residue and a filtrate, and the filtrate is transported to an impurity separator to separate impurities together with the first slurry to obtain a slurry of food waste.

6. The method for resource utilization of kitchen waste and municipal sludge according to claim 5, characterized in that: The method further comprises: After the impurities are separated from the filtrate and the first slurry, a third solid residue of kitchen waste is obtained, and the second solid residue and the third solid residue are transported out for disposal.

7. The method for resource utilization of kitchen waste and municipal sludge according to claim 4, characterized in that: The method of conveying the kitchen waste to a hydraulic pulping machine for pulping comprises: Magnetic separation is used to remove iron from food waste during the process of conveying the food waste to the hydraulic pulper.

8. The method for resource utilization of kitchen waste and municipal sludge according to claim 5, characterized in that: The three-phase separation of the slurry to obtain a solid phase and a liquid phase of the slurry, recorded as a second mixture, comprises: The slurry of food waste produced by the impurity separator is heated and then transported to a three-phase separator for three-phase separation to obtain fat, solid phase and liquid phase of the slurry, and the mixture formed by the solid phase and the liquid phase is recorded as the second mixture.

9. The method for resource utilization of kitchen waste and municipal sludge according to claim 1, characterized in that: The S300 includes: The first mixture and the second mixture are conveyed to a second mixing device and mixed according to a first preset ratio to obtain a third mixture, and then the third mixture is conveyed to an integrated hydrolysis and acidification device for hydrolysis and acidification to obtain a second slurry, and the second slurry is filtered through an ultrafiltration membrane in a filtrate tank to form an organic carbon source.

10. The method for resource utilization of kitchen waste and municipal sludge according to claim 9, characterized in that: The second mixing device is provided with a stirring device and an ultrasonic generator; The hydrolysis-acidification integrated device is provided with a mechanical stirring device, and the hydrolysis-acidification integrated device controls the temperature of the hydrolysis-acidification to be within a first preset temperature range.

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