Kitchen garbage treatment method, system and equipment based on green circulation and medium

Abstract

The invention provides a kitchen garbage treatment method, system, equipment and medium based on green circulation, and relates to the technical field of garbage treatment.The kitchen garbage treatment method comprises the steps that firstly, kitchen garbage is collected and fed into a pretreatment station, and solid residues and biogas residues are obtained; the solid residues and the biogas residues are used as raw materials, and organic fertilizer and a soil conditioner are prepared in a composting workshop; the organic fertilizer and the soil conditioner are fed into the landfill and used for planting energy grass; energy grass is harvested and fed into an incineration power plant; and finally, green electricity produced by the incineration power plant is conveyed to the pretreatment station and the composting workshop, auxiliary equipment of the landfill can also be supplied with power by the incineration power plant, wastewater, waste gas and waste residues can be produced in the pretreatment station, the composting workshop and the landfill, the wastewater is purified by sewage treatment equipment of the incineration power plant, and the waste gas is purified by waste gas treatment equipment of the incineration power plant. Waste gas and waste residues are fed into an incineration power plant to be incinerated and purified; according to the method, the kitchen garbage can be fully utilized, and green and environment-friendly effects are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of waste treatment, and in particular to a method, system, equipment and medium for treating kitchen waste based on green circulation. Background Art

[0002] As people's living standards improve, the output of various types of domestic waste continues to increase, and waste classification and treatment has become a key step in achieving sustainable development. However, waste is often classified and treated at the front end, and then mixed and uniformly incinerated or landfilled at the back end. This is not only not conducive to the utilization of resources, but also reduces people's enthusiasm for separating kitchen waste;

[0003] Among them, kitchen waste refers to the garbage generated in residents' daily life and food processing, catering services, unit catering and other activities, including discarded vegetable leaves, leftovers, leftover rice, fruit peels, egg shells, tea dregs, bones (chicken bones, fish bones), etc. Its main sources are home kitchens, restaurants, hotels, canteens, markets and other industries related to food processing.

[0004] In the current environmental sanitation industry, waste treatment enterprises have domestic waste incineration power plants. According to the "Construction Standards for Domestic Waste Incineration Treatment Projects" (Construction Standard 142-2010), the incineration plant construction project consists of the main project of the incineration plant, supporting projects, production management and life service facilities. Among them, the main project includes deodorization system, incineration system, flue gas purification system, waste heat utilization system, ash treatment system, etc. The supporting projects also include sewage treatment facilities, etc., and the construction and operation are tending to be perfect. Through the above treatment processes, domestic waste incineration power plants can incinerate and reduce the volume of various types of garbage and carry out secondary pollution prevention and control. It can be seen that the technology for incineration of domestic waste has gradually matured, and the cost and benefits of garbage classification have little impact on incineration power generation. Therefore, even if classification is carried out at the front end, for waste incineration plants, if there are no additional treatment processes and procedures, there is a high probability that mixed incineration will be carried out in the later stage;

[0005] And with the increasingly comprehensive and strict national environmental protection policies, as well as the policy requirements of building a circular society, promoting sustainable development, and reducing carbon dioxide emissions, the waste disposal and utilization method of incineration of domestic waste for power generation alone faces great challenges. Domestic waste is generally divided into four categories, among which kitchen waste generally accounts for more than 50% of the total domestic waste. Kitchen waste is rich in biological organic matter. Therefore, promoting the high-value utilization of kitchen waste has become the development direction of the waste disposal industry;

[0006] Under the guidance of national policies, the classification and recycling of kitchen waste is constantly advancing, and kitchen waste treatment plants are constantly emerging. However, affected by the economic, social environment and technical conditions, the current kitchen waste is generally disposed of in the following mode after collection. First, pretreatment is carried out to remove large impurities, and then physical oil, liquid and solid three-phase separation is carried out. The oil phase is sold separately, the liquid phase is anaerobic fermented, and the solid phase is incinerated. In this process, affected by the incoming kitchen waste, the oil phase output is low and the sales revenue is not high. Liquid phase anaerobic fermentation, but due to the instability of fermentation, it is generally directly discharged through torch combustion, and no revenue is generated. A large amount of solid slag enters the incineration power plant for direct incineration disposal, which is not utilized, resulting in great waste, and is not conducive to promoting the implementation of garbage classification in the whole society;

[0007] The main reason is that kitchen waste can only be used for high-value utilization through composting. The pollution generated during the composting process is difficult to control. In addition, the content of heavy metals in kitchen waste increases during its generation and collection. Therefore, its compost products cannot be used for large-scale agricultural production, resulting in no solution but incineration.

[0008] Therefore, when solving the kitchen waste problem, it is generally pre-treated first, and then landfilled or incinerated. At present, most major cities adopt the mode of kitchen waste pre-treatment + waste incineration power plant coordinated treatment. In the pre-treatment stage, the kitchen waste is first transported to the kitchen waste pre-treatment plant separately, the kitchen waste is crushed and the impurities are removed, and then the three-phase separation is carried out to separate the oil phase, liquid phase and solid phase; the oil phase is sold separately, the liquid phase is anaerobic fermented, and the solid phase is transported to the incineration power plant for incineration;

[0009] However, the organic matter in kitchen waste still cannot be fully utilized, resulting in resource loss, and the burning of organic matter will also produce more carbon dioxide and other gases, which is not conducive to the governance of the atmosphere;

[0010] Chinese patent (CN102049407) discloses an industrial symbiotic system for urban bulk solid waste treatment. The symbiotic system produces biomass-derived fuels by rationally proportioning the characteristics of bulk wastes such as domestic garbage, crop straw and municipal sludge, thereby achieving low-cost co-treatment of the three, improving energy utilization and reducing environmental pollution. However, the symbiotic system mainly focuses on the treatment of garbage, but the utilization of garbage has not yet been fully developed.

[0011] Therefore, we propose a treatment method that can make full use of kitchen waste and ensure green and environmental protection. Summary of the invention

[0012] The object of the present invention is to provide a method, system, equipment and medium for treating kitchen waste based on green circulation, which has less pollutant emissions and higher utilization rate of kitchen waste.

[0013] The embodiments of the present invention are implemented by the following technical solutions:

[0014] A method for treating kitchen waste based on green circulation, comprising:

[0015] Collect kitchen waste and send it to the pre-treatment station to obtain solid residue and biogas residue;

[0016] Solid slag and biogas residue are used as raw materials to make organic fertilizer and soil conditioner in the composting workshop;

[0017] Sending organic fertilizers and soil conditioners to landfills to grow energy grass;

[0018] Harvest energy grass and send it to incineration power plants;

[0019] The green electricity produced by the incineration power plant is transported to the pre-treatment station and composting workshop, and the auxiliary equipment of the landfill can also be powered by the incineration power plant.

[0020] Preferably, the method further establishes a control strategy for controlling the cyclic operation of the pre-treatment station, the composting plant, the landfill and the incineration power plant;

[0021] Then, the Internet of Things technology is used to monitor the key operating parameters of the pretreatment station, composting workshop, landfill and incineration power plant respectively, and the normal range and warning value of each key operating parameter are set. When the monitoring data exceeds the warning value, the corresponding control measures are automatically triggered;

[0022] The data model is then used to predict the production of derivatives at the pre-treatment station, composting plant, landfill and incineration power plant respectively;

[0023] Finally, the control strategy is adjusted in real time according to the difference between the predicted and actual yields of each derivative.

[0024] Preferably, the monitoring process of the Internet of Things technology includes:

[0025] Use humidity sensors to monitor the humidity of each material;

[0026] Use temperature sensors to monitor temperature changes during composting;

[0027] Gas concentration sensors are used to monitor the gas concentration produced by the anaerobic digestion process in the landfill and the harmful gases emitted by the incineration power plant;

[0028] Leachate monitoring sensors are used to monitor changes in the pH, conductivity, temperature and turbidity of leachate in landfills;

[0029] Soil and surface monitoring sensors are used to monitor the landfill's surface displacement, surface settlement and surface moisture content.

[0030] Preferably, the control strategy includes:

[0031] Automatically adjust the operating parameters of the crusher and impurity separator in the pre-treatment station according to the feed amount and composition analysis of food waste;

[0032] Automatically adjust the ventilation system and moisture addition system of the composting room based on sensor data to maintain optimal composting conditions;

[0033] The operation of the landfill's energy grass planting area irrigation system is automatically adjusted according to the leachate production and soil conditioner needs.

[0034] Preferably, the data model adopts a neural network model, a regression analysis model or a hybrid model.

[0035] A kitchen waste treatment system based on green circulation, comprising a pretreatment station, a composting workshop, a landfill, an incineration power plant and a comprehensive management platform; the pretreatment station is used to separate the kitchen waste into solid residue and biogas residue;

[0036] The composting workshop is used to make solid residue and biogas residue into organic fertilizer and soil conditioner;

[0037] The landfill is mixed with organic fertilizers and soil conditioners to grow energy grass in the soil;

[0038] The incineration power plant is used to incinerate the grown energy grass and generate electricity and steam, wherein the electricity is respectively transmitted to the pre-treatment station and the composting workshop, and the steam is transmitted to the composting workshop;

[0039] The integrated management platform is used to manage control strategies among pre-treatment stations, composting workshops, landfills and incineration power plants.

[0040] Preferably, the integrated management platform is also used to contact external companies to sell the excess organic fertilizer and green electricity when there is an overproduction of organic fertilizer produced by the composting workshop or green electricity generated by the incineration power plant.

[0041] Preferably, the integrated management platform is also used to execute emergency strategies when a failure occurs in the incineration power plant.

[0042] An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements a method for processing kitchen waste based on green recycling when executing the computer program.

[0043] A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, a method for treating kitchen waste based on green recycling is implemented.

[0044] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0045] The embodiment of the present invention can fully decompose the kitchen waste through the treatment method, and obtain solid residue, organic fertilizer, energy grass and green electricity and other products in the process of kitchen waste decomposition and treatment, so that the kitchen waste is fully utilized;

[0046] In addition, the pretreatment station, composting workshop, landfill and incineration power plant are managed in a coordinated manner through an integrated management platform to ensure the recycling of products among the four facilities, so that the system can operate sustainably and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 A schematic diagram of the method provided by the present invention;

[0049] Figure 2 It is a schematic diagram of the present invention combined with the control strategy;

[0050] Figure 3 This is a schematic diagram of the system structure provided by the present invention. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0053] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0054] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0055] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Example 1

[0057] A method for treating kitchen waste based on green recycling, combined with Figure 1 ,include:

[0058] Collect kitchen waste and send it to the pre-treatment station to obtain solid residue and biogas residue;

[0059] The pretreatment station is equipped with equipment such as a sorter, a crusher, a solid-liquid separator and an anaerobic digester, which are used to separate and crush the organic and inorganic substances in the kitchen waste, and then perform solid-liquid separation and other operations to finally obtain solid residue and biogas residue;

[0060] In addition, solid residues generally contain high levels of cellulose, lignin and other difficult-to-degrade organic matter, and may contain small amounts of inorganic impurities, and usually require further processing before they can be used for agriculture or other purposes;

[0061] Biogas residue is the residual material produced during anaerobic digestion, which is a process in which microorganisms decompose organic matter to produce biogas under anaerobic conditions. It generally contains rich organic matter and nutrients (such as nitrogen, phosphorus, and potassium), is usually liquid or semi-solid, easy to handle and transport, and has relatively stable pH value and nutritional content, making it suitable for direct use in agriculture.

[0062] Solid slag and biogas residue are used as raw materials to make organic fertilizer and soil conditioner in the composting workshop;

[0063] Among them, organic fertilizers provide nutrients needed by plants and improve soil structure, while soil conditioners can improve the physical and chemical properties of the soil and increase its water retention capacity and air permeability;

[0064] In addition, the process of converting solid slag into organic fertilizer is that the organic matter in the solid slag is decomposed by microorganisms to generate stable organic matter, that is, organic fertilizer; and the solid slag can also be carbonized in a high-temperature environment, which is achieved by the high-temperature steam delivered by the incineration power plant, thereby converting the solid slag into biochar for use as a soil conditioner;

[0065] Biogas residue can be directly used as organic fertilizer and soil conditioner, and biogas residue can also be mixed with other materials such as lime and gypsum to make composite soil conditioner;

[0066] In addition, in the composting workshop, the composting process can be accelerated and the composting cycle can be shortened by introducing efficient microbial agents; or a multi-stage composting process, such as aerobic-anaerobic alternating composting, can be adopted to improve the quality of organic fertilizer.

[0067] Sending organic fertilizers and soil conditioners to landfills to grow energy grass;

[0068] The landfill in this embodiment is a piece of land. By applying organic fertilizers and soil conditioners into the soil to promote the growth of energy grass, the consumption of the products of the composting workshop is realized, and the soil quality can be improved, soil erosion can be prevented, and the ecological landscape can be improved. In addition, in order to improve the utilization efficiency of the landfill, the planting plan can be dynamically adjusted according to seasonal changes and the growth characteristics of the energy grass to optimize the yield and quality of the energy grass, or ecological restoration projects can be carried out around the landfill to plant local plants and improve the ecological environment, thereby promoting the growth of energy grass.

[0069] Harvest energy grass and send it to incineration power plants;

[0070] Energy grass is a renewable biomass resource. Therefore, by planting and using energy grass to generate electricity, we can reduce our dependence on fossil fuels (such as coal, oil and natural gas). Compared with traditional fossil fuels, the carbon dioxide emissions generated by the combustion of energy grass are lower. By replacing high-carbon emission fossil fuels, greenhouse gas emissions can be significantly reduced. Energy grass absorbs carbon dioxide during its growth process, and the carbon dioxide emissions generated by its combustion are equivalent to the amount of carbon dioxide fixed during its growth process. Therefore, it has the potential for carbon neutrality during its life cycle.

[0071] In addition, if food waste is directly landfilled, a large amount of methane (a potent greenhouse gas) will be produced. By converting food waste into energy grass and burning it, the production of methane can be reduced; and in addition to self-use, the excess electricity can be sold to the power grid, bringing additional income to the company;

[0072] In addition, the data shows that the carbon emissions from the incineration of organic waste AD+ solid slag is 128.82kgCO2-eqt -1 , while AD+ solid residue composting is 100.77kgCO2-eqt -1 In this method, the overall carbon emissions are reduced by 17.13% compared with traditional composting, that is, the carbon emissions are only 83.51-eqt -1 Compared with the AD+ solid slag incineration mode, carbon emissions are reduced by 35.17%; therefore, on this basis, the soil conditioner produced by solid slag composting is used to improve the landfill soil, and energy grass is planted and then burned. Compared with direct incineration of FW power generation, the power generation output per ton of FW can be increased by 257%, which is equivalent to a carbon reduction of 565.3kg / t, further realizing carbon compensation.

[0073] The green electricity produced by the incineration power plant is transported to the pre-treatment station and composting workshop, and the auxiliary equipment of the landfill can also be powered by the incineration power plant;

[0074] It should be noted that the energy required for some auxiliary equipment in the landfill can also be obtained from the incineration power plant. In addition, the incineration power plant will have its own sewage treatment equipment, and the pretreatment station, composting workshop and landfill will also produce a certain amount of wastewater, waste gas and waste residue. The wastewater can be purified by the sewage treatment equipment of the incineration power plant, while the waste gas and waste residue are sent to the incinerator of the incineration power plant for incineration purification; thus, the method forms a green closed-loop system as a whole, improves the comprehensive utilization rate of resources, and reduces resource waste.

[0075] Example 2

[0076] Combined with Figure 2 ,The method is also used to control the cycle operation of pre-treatment station, composting plant, landfill and incineration power plant by establishing control ,strategies;

[0077] This control strategy is mainly used to control the specific operating parameters of each device, so that each device can achieve automatic cycle operation;

[0078] Then, the Internet of Things technology is used to monitor the key operating parameters of the pretreatment station, composting workshop, landfill and incineration power plant respectively, and the normal range and warning value of each key operating parameter are set. When the monitoring data exceeds the warning value, the corresponding control measures are automatically triggered;

[0079] It should be noted that when using the Internet of Things technology to monitor the operating parameters of each device, these operating parameters can also be analyzed to determine whether each device is in a normal operating state. Then, in conjunction with the normal range and warning values ​​of each key operating parameter, it can be linked to the control strategy accordingly; for example: when the temperature during the composting process is too high, the cooling system is started; when the humidity of the composting material is too low, water is automatically added; if the humidity is too high, the water addition is reduced or the ventilation volume is increased; when the pH value of the composting material is too low, alkaline substances (such as lime) are automatically added; if the pH value is too high, acidic substances (such as sulfuric acid) are added; when the pH value of the landfill leachate is too low, alkaline substances are added; if the pH value is too high, acidic substances are added, etc.

[0080] The data model is then used to predict the production of derivatives at the pre-treatment station, composting plant, landfill and incineration power plant respectively;

[0081] Finally, the control strategy is adjusted in real time based on the difference between the predicted and actual yields of each derivative;

[0082] Among them, pretreatment station and composting workshop: when it is predicted that the output of compost products will increase significantly, the pretreatment station needs to reduce the amount of solid slag produced accordingly, or increase the quality of compost raw materials; composting workshop and landfill: if the demand for organic fertilizer or soil conditioner is predicted to increase, the composting workshop should speed up production, and the landfill needs to prepare more space to absorb these products; landfill and incineration power plant: if the output of energy grass is predicted to increase, the landfill needs to adjust the planting area and irrigation plan, and the incineration power plant needs to prepare more incineration capacity to process these energy grasses.

[0083] In addition, the monitoring process of IoT technology includes:

[0084] Use humidity sensors to monitor the humidity of each material;

[0085] Use temperature sensors to monitor temperature changes during composting;

[0086] Gas concentration sensors are used to monitor the gas concentration produced by the anaerobic digestion process in the landfill and the harmful gases emitted by the incineration power plant;

[0087] Leachate monitoring sensors are used to monitor changes in the pH, conductivity, temperature and turbidity of leachate in landfills;

[0088] Use soil and surface monitoring sensors to monitor the landfill's surface displacement, surface settlement, and surface moisture content;

[0089] These sensors can effectively and comprehensively monitor the operating parameters of each device.

[0090] As required, the control strategy includes:

[0091] Automatically adjust the operating parameters of the crusher and impurity separator in the pre-treatment station according to the feed amount and composition analysis of food waste;

[0092] Automatically adjust the ventilation system and moisture addition system of the composting room based on sensor data to maintain optimal composting conditions;

[0093] Automatically adjust the irrigation system of the landfill's energy grass planting area according to the leachate production and soil conditioner needs;

[0094] In addition, the data model adopts a neural network model, a regression analysis model or a hybrid model;

[0095] Data analysis can determine the optimal material allocation plan to avoid overcapacity or undercapacity in a certain link. For example, when the biogas production from anaerobic fermentation is predicted to be unstable, the feed composition of the pretreatment station can be adjusted to stabilize the biogas production. Or use historical data and real-time data to train prediction models, such as using time series analysis or machine learning algorithms to predict future derivative production. According to the prediction results, the operating parameters of each facility can be adjusted in advance. For example, if it is predicted that biogas production will increase in the next few days, the capacity of the anaerobic digester can be increased in advance or the treatment efficiency can be improved.

[0096] Example 3

[0097] A kitchen waste treatment system based on green circulation, combined with Figure 3 , including a pretreatment station, a composting workshop, a landfill, an incineration power plant and an integrated management platform; the pretreatment station is used to separate kitchen waste into solid residue and biogas residue; in addition, the pretreatment station can also separate biodiesel, which can be directly sold;

[0098] The composting workshop is used to make solid residue and biogas residue into organic fertilizer and soil conditioner;

[0099] The landfill is mixed with organic fertilizers and soil conditioners to grow energy grass in the soil;

[0100] The incineration power plant is used to incinerate the grown energy grass and generate electricity and steam, wherein the electricity is respectively transmitted to the pre-treatment station and the composting workshop, and the steam is transmitted to the composting workshop;

[0101] The integrated management platform is used to manage the control strategies among pretreatment stations, composting workshops, landfills and incineration power plants. Through the integrated management platform, various facilities are closely linked together, which not only enables energy transmission, material transfer and information flow chains between the facilities, but also improves economic transformation.

[0102] In addition, the integrated management platform is also used to contact external companies to sell the excess organic fertilizer and green electricity when there is an overproduction of organic fertilizer produced by the composting workshop or green electricity generated by the incineration power plant.

[0103] As required, the integrated management platform is also used to execute emergency strategies when a failure occurs in the incineration power plant;

[0104] Among them, the emergency strategies in case of failure of the incineration power plant may include:

[0105] ① When an incineration power plant fails, the processing capacity of the composting workshop should be reduced to avoid producing too much organic fertilizer or soil conditioner, which are difficult to use effectively without sufficient incineration processing capacity; and this can be achieved by adjusting the feed amount of the composting workshop, reducing the production speed or temporarily stopping some production lines.

[0106] ② Reduce the crushing and separation process of food waste, and control the amount of solid residue / sludge entering the composting workshop; if possible, part of the food waste can be sent to other temporary storage facilities and wait for the incineration power plant to resume operation before processing.

[0107] ③Part of the organic fertilizer can be sold to external users.

[0108] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0109] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. The computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-On l yMemory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0110] In addition, the present invention is to give full play to the advantages of the existing waste incineration power generation system and promote the classification and recycling of kitchen waste. A "waste-fertilizer-grass-electricity" waste recycling model based on waste incineration power generation as described in Examples 1-3 is constructed. This model can give full play to the functions and roles of existing environmental sanitation facilities and promote the recycling and development of resources. It has theoretical and practical significance.

[0111] First, relying on the perfect policies and classified collection models of various places, kitchen waste should be collected and transported separately to avoid mixing with other domestic waste and directly entering the waste incineration power plant.

[0112] Secondly, a kitchen waste pretreatment system is constructed to physically stratify and collect kitchen waste according to its properties. The oil phase is sold and disposed of to generate income, the liquid phase is treated by anaerobic fermentation to reduce its organic matter content and is included in the leachate treatment system of the incineration power generation mode for compliant disposal, and the generated biogas can be disposed of by torch combustion or incorporated into the incinerator of the incineration power generation mode for utilization and disposal. The solid phase enters the next constructed aerobic composting mode for disposal. The sorted out debris that cannot be fermented is disposed of in the incinerator of the incineration power generation mode.

[0113] Secondly, an aerobic composting system is constructed to carry out aerobic fermentation of the solid residue sorted out by the kitchen waste pretreatment system. The odor generated during the fermentation is collected and disposed of in the odor treatment system of the incineration power generation mode, and the waste liquid is collected and disposed of in the leachate treatment system of the incineration power generation mode; the organic fertilizer and soil conditioner generated by composting are disposed of in the next constructed landfill final cover system.

[0114] Thirdly, compost products and soil conditioners are applied to the surface of the landfill's final cover system or mixed at a certain depth, and energy-generating lignocellulosic crops are introduced for planting and management, while avoiding the planting of starch and fat energy crops that would cause harmful substances to enter the biological cycle.

[0115] Finally, the energy crops produced are harvested, dried, and put into the incinerator system for incineration and power generation to produce green electricity. The green electricity produced by the waste incineration plant can be used by the above links that need electricity, forming energy feedback. In addition, the generated steam can also be used in composting facilities, etc.

[0116] The construction of the above five nodes can give full play to the role of waste incineration power plants in the disposal of domestic waste, material energy supply, and pollution prevention and control. It can realize the recycling and utilization of kitchen waste solid slag, the introduction of external energy, and the control of secondary pollution, expand the disposal scope of the original direct incineration mode, clear the bottlenecks between existing environmental sanitation implementation, improve their respective utilization efficiency, achieve pollution control with pollution, and improve economic output and social benefits, which has a strong practical promotion significance.

[0117] In addition, the construction of this model also solves some problems and brings certain advantages to various environmental sanitation facilities.

[0118] The first is to improve the efficiency of waste incineration power plants. Since domestic waste incineration power generation is a public utility, with the rapid advancement of urbanization and the continuous improvement of residents' living standards, the amount of domestic waste collection and transportation has increased year by year. In view of the construction site selection and cycle of waste incineration power plants, waste power plants in many regions have a certain degree of advanced construction. Xu Yakun conducted a DEA (data envelopment analysis) model analysis on 13 domestic waste incineration power generation BOT projects in Hunan and found that 5 of the 13 projects had varying degrees of investment redundancy. By expanding the production scale, investment redundancy can be effectively reduced and the project's efficiency can be improved. However, the output of urban domestic waste often fluctuates, and sometimes even cannot meet the conditions for the operation of the incinerator. In order to ensure the minimum storage operation volume of incineration power generation facilities and improve the production efficiency of waste incineration power plants, energy plants can be used to supplement them. According to research by Deng Suyuan and others, the calorific value of common energy herbs in China is between 16.45 and 18.24 MJ / kg, while the calorific value of standard coal is 29.3 MJ / kg. The calorific value of energy herbs is about half of standard coal, and can be used as an effective supplement to waste incineration power generation fuel. Therefore, the dynamic addition of new energy plants can supplement fuel for waste incineration power plants, effectively solve the problem of redundant construction of waste power plants, and help waste power plants operate smoothly. In addition, it can also help improve incineration efficiency, reduce pollution emissions, and reduce the cost of treating oil-containing leachate from kitchen waste solids.

[0119] Second, it promotes the stability and restoration of landfills. By using soil conditioners and organic fertilizers to grow energy grass, it is helpful to carry out ecological restoration of landfills that are sealed in situ and standardized, achieve full coverage of the landfill surface, increase soil organic matter, promote rapid and comprehensive recovery of vegetation, and form a good ecosystem. It helps to avoid the erosion of landfill soil by surface water and reduce the amount of groundwater seepage. In addition, it is also conducive to continuously improving the fertility of landfill soil, increasing the output of energy grass, and providing more ecological products.

[0120] Third, it is helpful for the application of organic fertilizer and soil conditioner produced by food waste composting plants. The product outlet of food waste composting is a key factor affecting the production of food waste composting. Through this model, composting products have a stable outlet, and the internal circulation of food waste composting products in the environmental sanitation treatment system can be realized. There is no risk of heavy metal pollution leakage. It not only complies with relevant national regulations, but also can give full play to the role of food waste organic matter and biochar, and promote their high-value utilization. It is also conducive to composting plants to continuously improve the quality of compost products and open up more product outlets.

[0121] Fourth, it helps to reduce the cost of kitchen waste solid residue disposal in kitchen waste pretreatment plants. The incineration of kitchen waste solid residue does not generate any income and requires a disposal fee. After coarse residue crushing and three-phase separation, kitchen waste solid residue has good composting properties and can be put into composting without additional pretreatment, and can generate greater income, thus reducing the cost of kitchen waste disposal.

[0122] 5. To provide trial experience for the incineration disposal of agricultural waste such as straw.

[0123] Sixth, it will help the large-scale planting of energy plants and the development of more energy utilization methods, such as acid, alcohol and hydrogen production by energy plants.

[0124] In summary, through the construction and application of this model, the utility of the incineration power plant can be fully utilized, the recycling model can be expanded and constructed, and the operation of the model can be smoother through continuous circulation. It can promote the smooth and normal operation of various environmental sanitation facilities, the production scale will continue to expand, the overall operating cost will continue to decrease, the external output will continue to increase, the pollution emissions will continue to decrease, and the economic and social benefits will continue to increase.

[0125] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for treating kitchen waste based on green recycling, characterized in that: include: Collect kitchen waste and send it to the pre-treatment station to obtain solid residue and biogas residue; Solid slag and biogas residue are used as raw materials to make organic fertilizer and soil conditioner in the composting workshop; Sending organic fertilizers and soil conditioners to landfills to grow energy grass; Harvest energy grass and send it to incineration power plants; The green electricity produced by the incineration power plant is transported to the pre-treatment station and composting workshop, and the auxiliary equipment of the landfill can also be powered by the incineration power plant.

2. The method for treating kitchen waste based on green recycling as claimed in claim 1, characterized in that: The method also establishes control strategies for controlling the cyclic operation of pre-treatment stations, composting plants, landfills and incineration power plants; Then, the Internet of Things technology is used to monitor the key operating parameters of the pretreatment station, composting workshop, landfill and incineration power plant respectively, and the normal range and warning value of each key operating parameter are set. When the monitoring data exceeds the warning value, the corresponding control measures are automatically triggered; The data model is then used to predict the production of derivatives at the pre-treatment station, composting plant, landfill and incineration power plant respectively; Finally, the control strategy is adjusted in real time according to the difference between the predicted and actual yields of each derivative.

3. The method for treating kitchen waste based on green recycling as claimed in claim 2, characterized in that: The monitoring process of IoT technology includes: Use humidity sensors to monitor the humidity of each material; Use temperature sensors to monitor temperature changes during composting; Gas concentration sensors are used to monitor the gas concentration produced by the anaerobic digestion process in the landfill and the harmful gases emitted by the incineration power plant; Leachate monitoring sensors are used to monitor changes in the pH, conductivity, temperature and turbidity of leachate in landfills; Soil and surface monitoring sensors are used to monitor the landfill's surface displacement, surface settlement and surface moisture content.

4. The method for treating kitchen waste based on green recycling as claimed in claim 3, characterized in that: The control strategy includes: Automatically adjust the operating parameters of the crusher and impurity separator in the pre-treatment station according to the feed amount and composition analysis of food waste; Automatically adjust the ventilation system and moisture addition system of the composting room based on sensor data to maintain optimal composting conditions; The operation of the landfill's energy grass planting area irrigation system is automatically adjusted according to the leachate production and soil conditioner needs.

5. The method for treating kitchen waste based on green recycling as claimed in claim 2, characterized in that: The data model adopts a neural network model, a regression analysis model or a hybrid model.

6. A kitchen waste treatment system based on green circulation, comprising a pretreatment station, a composting workshop, a landfill, an incineration power plant and an integrated management platform; the pretreatment station is used to separate the kitchen waste into solid residue and biogas residue; The composting workshop is used to make solid residue and biogas residue into organic fertilizer and soil conditioner; The landfill is mixed with organic fertilizers and soil conditioners to grow energy grass in the soil; The incineration power plant is used to incinerate the grown energy grass and generate electricity and steam, wherein the electricity is respectively transmitted to the pre-treatment station and the composting workshop, and the steam is transmitted to the composting workshop; The integrated management platform is used to manage control strategies among pre-treatment stations, composting workshops, landfills and incineration power plants.

7. The green recycling-based kitchen waste treatment system according to claim 6, characterized in that: The integrated management platform is also used to contact external companies to sell the excess organic fertilizer and green electricity when there is an overproduction of organic fertilizer produced by the composting workshop or green electricity generated by the incineration power plant.

8. The green recycling-based kitchen waste treatment system according to claim 6, characterized in that: The integrated management platform is also used to execute emergency strategies when a failure occurs in the incineration power plant.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method for treating kitchen waste based on green recycling as described in claims 1-5 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, it implements the method for treating kitchen waste based on green recycling as described in claims 1-5.

Images