Treatment process for realizing recycling and harmless reutilization of kitchen garbage

Abstract

The invention discloses a treatment process for realizing recycling and harmless reutilization of kitchen garbage, and relates to the technical field of kitchen garbage treatment.The treatment process comprises the following steps that kitchen garbage is subjected to separation treatment, specifically, the collected kitchen garbage is concentrated in a separation device; solid kitchen garbage and liquid kitchen garbage in the kitchen garbage are separated through the separation device, and during separation, the kitchen garbage is subjected to centrifugal treatment through the separation device. According to the method, the organic fertilizer is prepared from the solid garbage in a fermentation mode, then oil liquid in the liquid garbage is separated from sewage, and the separated oil liquid is used as a raw material of the biodiesel, so that recycling of resources is achieved, soil pollution caused by the oil liquid after direct landfill is prevented, and the environment is protected. And finally, the sewage is treated through anaerobic treatment and biological treatment, organic matters in the sewage are removed as far as possible, the environmental pollution caused by sewage discharge is prevented, and harmless recycling of resources is realized through classified treatment of the kitchen garbage.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen waste treatment, and in particular to a treatment process for realizing the resource-based and harmless recycling of kitchen waste. Background Art

[0002] Kitchen waste is the food residue and waste generated in residents' daily life, food processing, catering services and other activities, and is an important part of domestic waste. Kitchen waste accounts for a large proportion of domestic waste, and is the food residue and waste generated in residents' daily life, food processing, catering services and other activities, and is an important part of domestic waste.

[0003] Kitchen waste includes solid waste such as food residues and fertilizers, and liquid waste such as sewage and waste oil. The current methods of treating domestic waste mainly include composting, landfill and incineration. Composting is suitable for treating waste with high content of perishable and degradable organic matter. It not only converts organic components into organic fertilizers for application, but also reduces environmental pollution and kills bacteria in garbage. It has the characteristics of harmlessness and resource utilization. However, the composting method has a long treatment cycle, occupies a large area, and produces volatile sulfides that pollute the atmosphere. In particular, some heavy metal elements in garbage will be enriched in the soil and enter the human body through the food chain, seriously endangering human health. The landfill method has many advantages such as mature technology, simple operation, low investment and operation costs, large processing capacity, and applicability to all types of garbage. It is currently the most widely used treatment method. However, the landfilled garbage has not been harmlessly treated, and a large number of bacteria and viruses remain. There are also hidden dangers such as biogas heavy metal pollution. The garbage leachate will also pollute groundwater resources for a long time. The garbage incineration method can reduce the volume of garbage. Generally, the volume can be reduced by 80%-90% after incineration treatment. The volume reduction effect is quite significant. It occupies a small area and is flexible in site selection. It is close to the urban area, reduces garbage transportation costs, and has a short treatment cycle. At the same time, the heat energy from garbage incineration can be recycled for power generation, and the remaining gas can be used for heating, turning waste into treasure, and the degree of resource utilization is high. The disadvantages are that the calorific value of the garbage is high. If the calorific value is low, auxiliary fuel needs to be added, which increases the investment cost. Secondly, the exhaust gas from incineration contains a large amount of particulate matter, sulfur oxides, nitrogen oxides, heavy metals and other pollutants, which poses a secondary pollution problem. Therefore, it is necessary to propose a treatment process for the resource-based harmless reuse of kitchen waste, treat the kitchen waste harmlessly, and recycle the resources in the kitchen waste as much as possible, so as to solve the above problems in the treatment of kitchen waste. Summary of the invention

[0004] The purpose of this application is to provide a processing technology for realizing the harmless resource recycling of kitchen waste, so as to solve the problem that the collection and publication of Internet data proposed in the above background technology will directly pose a threat to personal privacy. If the data owner directly publishes implicit sensitive information without adopting appropriate data protection technology, it may cause personal privacy leakage.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a processing process for realizing the resource-based and harmless recycling of kitchen waste, comprising the following steps:

[0006] S1: separation and treatment of kitchen waste, collecting kitchen waste in a separation device, separating solid kitchen waste from liquid kitchen waste in the kitchen waste through the separation device, and centrifuging the kitchen waste through the separation device, so that the liquid in the kitchen waste is separated from the solid kitchen waste under the centrifugal action, thereby completing the separation of the kitchen waste. After the solid-liquid separation is completed, the plastic bags, metals and other substances in the solid waste are picked out, the metal substances are recycled, and the plastic bags are decomposed and buried;

[0007] S2: Treatment of solid waste and liquid waste. After the solid-liquid separation of kitchen waste is completed, the solid waste is crushed. After crushing, the solid waste is input into the fermentation device for fermentation treatment. When treating liquid waste, the liquid waste is left to stand so that the water and oil in the liquid waste are separated under the action of gravity, with the oil on the top and the water on the bottom, thereby separating the water and oil in the liquid waste for subsequent treatment;

[0008] S3: Fermentation treatment of solid waste: After the solid waste is crushed, a fermentation agent, soybean meal, fermentation bacteria, rice husks, etc. are added to the crushed solid waste, and the fermentation agent, soybean meal, rice husks, etc. are mixed with the solid waste. After the mixing is completed, the mixture is placed in a fermentation device for fermentation. After the fermentation is completed, the fermented product is filtered to remove the liquid alcohol in the fermented product, and then the fermented product is dried. After the drying is completed, the dried fermented product is mixed with water and the solid waste is granulated by a granulating device, and then the fermented product is made into organic fertilizer;

[0009] S4: Subsequent treatment of kitchen waste oil: After the oil and water in the liquid waste are separated, the separated waste oil is heated. As the temperature of the oil increases, the remaining water in the oil gradually evaporates, thereby purifying the oil and removing the water in the oil. The oil after the water is removed is then centrifuged and filtered to remove impurities in the oil again. The oil after the impurities are removed is used as the raw material of biodiesel;

[0010] S5: Subsequent treatment of kitchen wastewater. After the wastewater in the liquid garbage is separated, it is first input into the reactor, and anaerobic bacteria are added to the wastewater for mixing. After the mixing is completed, the wastewater is treated by adjusting the reaction temperature of the reactor. The oily wastewater contains small particles of kitchen waste and sludge, etc. These substances gradually ferment under the action of anaerobic bacteria to produce biogas. Then the biogas is extracted and desulfurized. The biogas after treatment can be used as a supply energy in the reaction process. After the anaerobic treatment of the sewage is completed, the sewage and the sludge are separated. After the separation is completed, the separated sewage is subjected to biological treatment. During the biological treatment of the sewage, a biological treatment agent is added to the sewage to complete the biological treatment of the sewage. After the biological treatment is completed, most of the organic matter and microorganisms in the sewage are removed, and then the sewage after biological treatment is separated and treated, and the sludge generated by the biological treatment is removed again. Finally, the sewage is subjected to sedimentation treatment. After the sewage sedimentation is completed, the purification of the kitchen wastewater is completed, and the purified kitchen wastewater can be discharged.

[0011] Preferably, during the solid waste fermentation treatment, the ratio of solid waste, soybean meal, fermentation bacteria and rice husk is 200-300 parts of solid waste, 50-80 parts of soybean meal, 10-20 parts of fermentation bacteria and 100-150 parts of rice husk, and the fermentation bacteria include lactobacillus, acetobacillus, bacillus subtilis, bacillus megaterium and yeast, and the ratio of lactobacillus, acetobacillus, bacillus subtilis, bacillus megaterium and yeast is 2:0.5:1:1.5:2.

[0012] Preferably, during the fermentation treatment of the solid waste, the water content of the solid waste is between 20% and 40%, and the temperature of the fermentation treatment of the solid waste is between 40 degrees Celsius and 50 degrees Celsius. When the internal temperature of the solid waste exceeds 60 degrees Celsius, the solid waste needs to be turned over, while ensuring that the fermentation temperature of the solid waste is not lower than 40 degrees Celsius.

[0013] Preferably, the fermentation period of the solid waste is 4-8 days. The solid waste is fermented to obtain a fermented product. After the fermentation is completed, the fermented product is distilled to extract the alcohol in the fermented product. The fermented product is then dried and excess water in the fermented product is removed by extrusion. It is appropriate to maintain the water content in the fermented product at 10% to 15%. The fermented product is then granulated by a granulator to obtain fertilizer granules.

[0014] Preferably, when the oil after water-oil separation is purified, the heating temperature of the oil is between 150 degrees Celsius and 200 degrees Celsius, and the minimum temperature of the oil shall not be lower than 100 degrees Celsius. When the oil is heated, the heating duration is more than three hours until water vapor is no longer generated in the oil.

[0015] Preferably, when the liquid kitchen waste is separated into water and oil, a gravity separation method is adopted, and the kitchen wastewater is left to stand for twenty-four hours. The oil in the liquid waste floats up under the action of gravity, and the water and oil are stratified, in which the oil is located on the top and the wastewater is located at the bottom. During separation, the wastewater and sludge produced by precipitation are discharged from the bottom of the device, and the oil is left inside the device for direct heating and purification.

[0016] Preferably, after the kitchen wastewater is separated from the oil, the kitchen wastewater is passed into a reactor and anaerobic bacteria are added. The bacteria added in this process include Clostridium perfringens, thermophilic bifidobacterium, Bacteroides, succinic acid producing bacteria, methanogens, etc. The ratio of Clostridium perfringens, thermophilic bifidobacterium, Bacteroides, succinic acid producing bacteria, and methanogens is 2.5:1:1:1:3, and the ratio of the bacteria to the kitchen wastewater is 1:800.

[0017] Preferably, when the sewage is subjected to anaerobically treatment, the sewage reaction temperature is maintained between 10 degrees Celsius and 15 degrees Celsius. When the reaction temperature is higher than 20 degrees Celsius, the sewage temperature needs to be controlled to lower the sewage temperature. The temperature lowering method is mainly to add cold water to the reaction sewage and mix it with the reaction sewage to lower the reaction temperature.

[0018] Preferably, when the sewage is subjected to anaerobic reaction for mud-water separation and when the sewage is subjected to biological treatment for cement separation, a filtering device is required for filtering and separating, wherein the mesh size of the filtering device required for biological treatment cement separation should be greater than the mesh size of the pot device required for anaerobic reaction cement separation.

[0019] Preferably, the reaction time of the sewage anaerobic reaction should be 5-8 days. When the sewage is undergoing anaerobic reaction, the generated biogas needs to be extracted in time until biogas is no longer generated. The time of the sewage biological treatment is 2-4 days, and the biological treatment temperature should be maintained between 40 degrees Celsius and 50 degrees Celsius.

[0020] In summary, the technical effects and advantages of the present invention are as follows:

[0021] In the present invention, solid waste and liquid waste in kitchen waste are first separated, and food residues and waste materials in solid waste are firstly fermented to prepare organic fertilizer, thereby realizing harmless treatment and resource utilization of kitchen waste. Meanwhile, harmful microorganisms and harmful substances in kitchen waste are killed and decomposed through the comprehensive action of fermentation and microorganisms, and there is no need to disinfect the raw materials, thus no environmental pollution and no damage to plants are caused, and the occurrence of diseases and insect pests is reduced. Secondly, oil and sewage in liquid waste are separated, and the separated oil is used as a raw material for biodiesel, thereby realizing resource recycling and reuse, and preventing soil pollution caused by oil after direct landfill. Finally, sewage is treated by anaerobic treatment and biological treatment, and organic matter in sewage is removed as much as possible to prevent sewage discharge from polluting the environment. In addition, clean energy such as biogas can be obtained when sewage is anaerobic treated. Harmless resource reuse is realized by classified treatment of kitchen waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the operating process of a treatment process proposed in this application for realizing resource-based and harmless recycling of kitchen waste. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example: Reference Figure 1 A processing process for realizing the resource-based and harmless recycling of kitchen waste is shown, comprising the following steps:

[0026] S1: separation and treatment of kitchen waste, collecting kitchen waste in a separation device, separating solid kitchen waste from liquid kitchen waste in the kitchen waste through the separation device, and centrifuging the kitchen waste through the separation device, so that the liquid in the kitchen waste is separated from the solid kitchen waste under the centrifugal action, thereby completing the separation of the kitchen waste. After the solid-liquid separation is completed, the plastic bags, metals and other substances in the solid waste are picked out, the metal substances are recycled, and the plastic bags are decomposed and buried;

[0027] S2: Treatment of solid waste and liquid waste. After the solid-liquid separation of kitchen waste is completed, the solid waste is crushed. After crushing, the solid waste is input into the fermentation device for fermentation treatment. When treating liquid waste, the liquid waste is left to stand so that the water and oil in the liquid waste are separated under the action of gravity, with the oil on the top and the water on the bottom, thereby separating the water and oil in the liquid waste for subsequent treatment;

[0028] S3: Fermentation treatment of solid waste: After the solid waste is crushed, a fermentation agent, soybean meal, fermentation bacteria, rice husks, etc. are added to the crushed solid waste, and the fermentation agent, soybean meal, rice husks, etc. are mixed with the solid waste. After the mixing is completed, the mixture is placed in a fermentation device for fermentation. After the fermentation is completed, the fermented product is filtered to remove the liquid alcohol in the fermented product, and then the fermented product is dried. After the drying is completed, the dried fermented product is mixed with water and the solid waste is granulated by a granulating device, and then the fermented product is made into organic fertilizer;

[0029] S4: Subsequent treatment of kitchen waste oil: After the oil and water in the liquid waste are separated, the separated waste oil is heated. As the temperature of the oil increases, the remaining water in the oil gradually evaporates, thereby purifying the oil and removing the water in the oil. The oil after the water is removed is then centrifuged and filtered to remove impurities in the oil again. The oil after the impurities are removed is used as the raw material of biodiesel;

[0030] S5: Subsequent treatment of kitchen wastewater. After the wastewater in the liquid garbage is separated, it is first input into the reactor, and anaerobic bacteria are added to the wastewater for mixing. After the mixing is completed, the wastewater is treated by adjusting the reaction temperature of the reactor. The oily wastewater contains small particles of kitchen waste and sludge, etc. These substances gradually ferment under the action of anaerobic bacteria to produce biogas. Then the biogas is extracted and desulfurized. The biogas after treatment can be used as a supply energy in the reaction process. After the anaerobic treatment of the sewage is completed, the sewage and the sludge are separated. After the separation is completed, the separated sewage is subjected to biological treatment. During the biological treatment of the sewage, a biological treatment agent is added to the sewage to complete the biological treatment of the sewage. After the biological treatment is completed, most of the organic matter and microorganisms in the sewage are removed, and then the sewage after biological treatment is separated and treated, and the sludge generated by the biological treatment is removed again. Finally, the sewage is subjected to sedimentation treatment. After the sewage sedimentation is completed, the purification of the kitchen wastewater is completed, and the purified kitchen wastewater can be discharged.

[0031] As a preferred implementation mode of this embodiment, during the solid waste fermentation treatment, the ratio of solid waste, soybean meal, fermentation bacteria and rice husk is 200-300 parts of solid waste, 50-80 parts of soybean meal, 10-20 parts of fermentation bacteria and 100-150 parts of rice husk. The fermentation bacteria include lactobacillus, acetobacillus, bacillus subtilis, bacillus megaterium and yeast. The ratio of lactobacillus, acetobacillus, bacillus subtilis, bacillus megaterium and yeast is 2:0.5:1:1.5:2.

[0032] As a preferred implementation manner of this embodiment, during the solid waste fermentation treatment, the water content of the solid waste is between 20% and 40%, and the temperature of the solid waste fermentation treatment is between 40 degrees Celsius and 50 degrees Celsius. When the internal temperature of the solid waste exceeds 60 degrees Celsius, the solid waste needs to be turned over, while ensuring that the fermentation temperature of the solid waste is not lower than 40 degrees Celsius.

[0033] As a preferred implementation manner of this embodiment, the fermentation days of the solid waste are 4-8 days. The solid waste is fermented to obtain a fermented product. After the fermentation is completed, the fermented product is distilled to extract the alcohol in the fermented product by distillation. The fermented product is then dried and excess water in the fermented product is removed by extrusion. It is appropriate to maintain the water content in the fermented product at 10% to 15%. The fermented product is then granulated by a granulator to obtain fertilizer granules.

[0034] As a preferred implementation manner of this embodiment, when the oil after water-oil separation is purified, the heating temperature of the oil is between 150 degrees Celsius and 200 degrees Celsius, and the minimum temperature of the oil shall not be lower than 100 degrees Celsius. When the oil is heated, the heating duration is more than three hours until no water vapor is generated in the oil.

[0035] As a preferred implementation manner of this embodiment, when the liquid kitchen waste is separated from water and oil, a gravity separation method is adopted, and the kitchen waste water is left to stand for twenty-four hours. The oil in the liquid waste floats up under the action of gravity, and the water and oil are stratified, in which the oil is located on the upper part and the waste water is located at the lower part. During separation, the waste water and the sludge produced by the precipitation are discharged from the bottom of the device, and the oil is left inside the device for direct heating and purification.

[0036] As a preferred implementation mode of this embodiment, after the kitchen waste water is separated from the oil, the kitchen waste water is passed into the reactor and anaerobic bacteria are added. The bacteria added in this process include Clostridium perfringens, thermophilic bifidobacterium, Bacteroides, succinic acid producing bacteria, methanogens, etc. The ratio of Clostridium perfringens, thermophilic bifidobacterium, Bacteroides, succinic acid producing bacteria, and methanogens is 2.5:1:1:1:3, and the ratio of the bacteria to the kitchen waste water is 1:800.

[0037] As a preferred implementation mode of this embodiment, when the sewage is subjected to anaerobically treatment, the sewage reaction temperature is maintained between 10 degrees Celsius and 15 degrees Celsius. When the reaction temperature is higher than 20 degrees Celsius, the sewage temperature needs to be controlled to lower the sewage temperature. The temperature lowering method is mainly to add cold water to the reaction sewage and mix it with the reaction sewage to lower the reaction temperature.

[0038] As a preferred implementation of this embodiment, when the sewage is subjected to anaerobic reaction for mud-water separation and when the sewage is subjected to biological treatment for cement separation, a filtering device is required for filtering and separating. The mesh size of the filtering device required for biological treatment cement separation should be greater than the mesh size of the pot device required for anaerobic reaction cement separation.

[0039] As a preferred implementation manner of this embodiment, the reaction time of the sewage anaerobic reaction should be 5-8 days. When the sewage is undergoing anaerobic reaction, the generated biogas needs to be extracted in time until biogas is no longer generated. The time of the sewage biological treatment is 2-4 days, and the biological treatment temperature should be maintained between 40 degrees Celsius and 50 degrees Celsius.

[0040] Working principle of the present invention:

[0041] In the present invention, solid waste and liquid waste in kitchen waste are first separated, and food residues and waste materials in solid waste are firstly fermented to prepare organic fertilizer, thereby realizing harmless treatment and resource utilization of kitchen waste. Meanwhile, harmful microorganisms and harmful substances in kitchen waste are killed and decomposed through the comprehensive action of fermentation and microorganisms, and there is no need to disinfect the raw materials, thus no environmental pollution and no damage to plants are caused, and the occurrence of diseases and insect pests is reduced. Secondly, oil and sewage in liquid waste are separated, and the separated oil is used as a raw material for biodiesel, thereby realizing resource recycling and reuse, and preventing soil pollution caused by oil after direct landfill. Finally, sewage is treated by anaerobic treatment and biological treatment, and organic matter in sewage is removed as much as possible to prevent sewage discharge from polluting the environment. In addition, clean energy such as biogas can be obtained when sewage is anaerobic treated. Harmless resource reuse is realized by classified treatment of kitchen waste.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A processing process for realizing the harmless recycling of kitchen waste, characterized in that: The following steps are involved: S1: separation and treatment of kitchen waste, collecting kitchen waste in a separation device, separating solid kitchen waste from liquid kitchen waste in the kitchen waste through the separation device, and centrifuging the kitchen waste through the separation device, so that the liquid in the kitchen waste is separated from the solid kitchen waste under the centrifugal action, thereby completing the separation of the kitchen waste. After the solid-liquid separation is completed, the plastic bags, metals and other substances in the solid waste are picked out, the metal substances are recycled, and the plastic bags are decomposed and buried; S2: Treatment of solid waste and liquid waste. After the solid-liquid separation of kitchen waste is completed, the solid waste is crushed. After crushing, the solid waste is input into the fermentation device for fermentation treatment. When treating liquid waste, the liquid waste is left to stand so that the water and oil in the liquid waste are separated under the action of gravity, with the oil on the top and the water on the bottom, thereby separating the water and oil in the liquid waste for subsequent treatment; S3: Fermentation treatment of solid waste: After the solid waste is crushed, a fermentation agent, soybean meal, fermentation bacteria, rice husks, etc. are added to the crushed solid waste, and the fermentation agent, soybean meal, rice husks, etc. are mixed with the solid waste. After the mixing is completed, the mixture is placed in a fermentation device for fermentation. After the fermentation is completed, the fermented product is filtered to remove the liquid alcohol in the fermented product, and then the fermented product is dried. After the drying is completed, the dried fermented product is mixed with water and the solid waste is granulated by a granulating device, and then the fermented product is made into organic fertilizer; S4: Subsequent treatment of kitchen waste oil: After the oil and water in the liquid waste are separated, the separated waste oil is heated. As the temperature of the oil increases, the remaining water in the oil gradually evaporates, thereby purifying the oil and removing the water in the oil. The oil after the water is removed is then centrifuged and filtered to remove impurities in the oil again. The oil after the impurities are removed is used as the raw material of biodiesel; S5: Subsequent treatment of kitchen wastewater. After the wastewater in the liquid garbage is separated, it is first input into the reactor, and anaerobic bacteria are added to the wastewater for mixing. After the mixing is completed, the wastewater is treated by adjusting the reaction temperature of the reactor. The oily wastewater contains small particles of kitchen waste and sludge, etc. These substances gradually ferment under the action of anaerobic bacteria to produce biogas. Then the biogas is extracted and desulfurized. The biogas after treatment can be used as a supply energy in the reaction process. After the anaerobic treatment of the sewage is completed, the sewage and the sludge are separated. After the separation is completed, the separated sewage is subjected to biological treatment. During the biological treatment of the sewage, a biological treatment agent is added to the sewage to complete the biological treatment of the sewage. After the biological treatment is completed, most of the organic matter and microorganisms in the sewage are removed, and then the sewage after biological treatment is separated and treated, and the sludge generated by the biological treatment is removed again. Finally, the sewage is subjected to sedimentation treatment. After the sewage sedimentation is completed, the purification of the kitchen wastewater is completed, and the purified kitchen wastewater can be discharged.

2. A processing process for realizing the resource-based and harmless recycling of kitchen waste according to claim 1, characterized in that: During the solid waste fermentation treatment, the ratio of solid waste, soybean meal, fermentation bacteria and rice husk is 200-300 parts of solid waste, 50-80 parts of soybean meal, 10-20 parts of fermentation bacteria and 100-150 parts of rice husk. The fermentation bacteria include lactobacillus, acetobacillus, bacillus subtilis, bacillus megaterium and yeast. The ratio of lactobacillus, acetobacillus, bacillus subtilis, bacillus megaterium and yeast is 2:0.5:1:1.5:

2.

3. A processing process for realizing the harmless recycling of kitchen waste according to claim 1, characterized in that: During the solid waste fermentation treatment, the water content of the solid waste is between 20% and 40%, and the temperature of the solid waste fermentation treatment is between 40 degrees Celsius and 50 degrees Celsius. When the internal temperature of the solid waste exceeds 60 degrees Celsius, the solid waste needs to be turned over, while ensuring that the fermentation temperature of the solid waste is not lower than 40 degrees Celsius.

4. A processing process for realizing the resource-based and harmless recycling of kitchen waste according to claim 3, characterized in that: The solid waste is fermented for 4-8 days. The solid waste is fermented to obtain a fermented product. After the fermentation is completed, the fermented product is distilled to extract the alcohol in the fermented product. The fermented product is then dried and excess water in the fermented product is removed by extrusion. The water content in the fermented product is preferably maintained at 10% to 15%. The fermented product is then granulated by a granulator to obtain fertilizer granules.

5. The process for realizing the harmless recycling of kitchen waste according to claim 1, characterized in that: When the oil after water-oil separation is purified, the heating temperature of the oil is between 150 degrees Celsius and 200 degrees Celsius, and the minimum temperature of the oil shall not be lower than 100 degrees Celsius. When the oil is heated, the heating duration is more than three hours until no water vapor is generated in the oil.

6. A processing process for realizing the harmless recycling of kitchen waste according to claim 1, characterized in that: When the liquid kitchen waste is separated into water and oil, a gravity separation method is adopted, and the kitchen waste water is left to stand for 24 hours. The oil in the liquid waste floats up under the action of gravity, and the water and oil are stratified, in which the oil is located on the upper side and the waste water is located at the lower side. During separation, the waste water and the sludge produced by the precipitation are discharged from the bottom of the device, and the oil is retained in the device for direct heating and purification.

7. The process for realizing the harmless recycling of kitchen waste according to claim 1, characterized in that: After the kitchen waste water is separated from the oil, the kitchen waste water is passed into a reactor and anaerobic bacteria are added. The bacteria added in this process include Clostridium perfringens, thermophilic bifidobacterium, Bacteroides, succinic acid producing bacteria, methanogens, etc. The ratio of Clostridium perfringens, thermophilic bifidobacterium, Bacteroides, succinic acid producing bacteria, and methanogens is 2.5:1:1:1:3, and the ratio of the bacteria to the kitchen waste water is 1:

800.

8. A processing process for realizing the harmless recycling of kitchen waste according to claim 7, characterized in that: When the sewage is subjected to anaerobically treatment, the sewage reaction temperature is maintained between 10 degrees Celsius and 15 degrees Celsius. When the reaction temperature is higher than 20 degrees Celsius, the sewage temperature needs to be controlled to lower the sewage temperature. The temperature lowering method is mainly to add cold water to the reaction sewage and mix it with the reaction sewage to lower the reaction temperature.

9. The process for realizing the harmless recycling of kitchen waste according to claim 1, characterized in that: When the sewage is subjected to anaerobic reaction for mud-water separation and when the sewage is subjected to biological treatment for cement separation, a filtering device is required for filtering and separating. The mesh number of the filtering device required for biological treatment cement separation should be greater than the mesh number of the pot device required for anaerobic reaction cement separation.

10. A processing process for realizing harmless resource utilization of kitchen waste according to claim 9, characterized in that: The reaction time of the sewage anaerobic reaction should be 5-8 days. When the sewage is undergoing anaerobic reaction, the generated biogas needs to be extracted in time until biogas is no longer generated. The time of the sewage biological treatment is 2-4 days, and the biological treatment temperature should be maintained between 40 degrees Celsius and 50 degrees Celsius.

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