A kitchen waste treatment method, system, equipment and medium based on green circulation

Abstract

The present invention provides a kitchen waste treatment method, system, equipment and medium based on green circulation, which relates to the field of waste treatment technology. First, kitchen waste is collected and sent to a pretreatment station to obtain solid residue and biogas residue; then, the solid residue and biogas residue are used as raw materials and made into organic fertilizer and soil conditioner by a composting workshop; then the organic fertilizer and soil conditioner are sent to a landfill for growing energy grass; next, the energy grass is harvested and sent to an incineration power plant; finally, the green electricity produced by the incineration power plant is transported to the pretreatment station and the composting workshop, and the auxiliary equipment of the landfill can also be powered by the incineration power plant, while the pretreatment station, composting workshop and landfill will generate wastewater, waste gas and waste residue, among which the wastewater is purified by the sewage treatment equipment of the incineration power plant, and the waste gas and waste residue are sent to the incineration power plant for incineration purification; this method can make full use of kitchen waste and ensure green and environmental protection.

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 recycling. Background Art

[0002] As people's living standards improve, the amount of household waste continues to increase. Sorting and processing waste has become a key step in achieving sustainable development. However, waste is often sorted and processed at the front end, but then mixed and incinerated or landfilled at the back end. This is not only detrimental to resource utilization, 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 meal supply and other activities, including discarded vegetable leaves, leftovers, leftover rice, fruit peels, eggshells, 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, garbage disposal 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., and the supporting projects also include sewage treatment facilities, etc., and the construction and operation tend 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 domestic waste incineration technology 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 the garbage incineration plant, if there are no additional treatment processes and procedures, mixed incineration will most likely be carried out in the later stage;

[0005] Furthermore, with the increasingly comprehensive and stringent national environmental protection policies, as well as the policy requirements of building a circular society, promoting sustainable development, and reducing carbon dioxide emissions, the single method of waste disposal and utilization, incineration of domestic waste for power generation, faces great challenges. Domestic waste is generally divided into four categories, of which kitchen waste generally accounts for more than 50% of the total domestic waste. Kitchen waste is rich in organic matter, so 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 modes 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, due to the influence of 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 discharged directly through torch combustion, and no revenue is generated. A large amount of solid slag enters the incineration power plant for direct incineration disposal, and 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 production and collection. Therefore, the composted products cannot be used for large-scale agricultural production, resulting in a dead end and the only option is incineration.

[0008] Therefore, when solving the problem of kitchen waste, it is generally pre-treated before landfilling or incineration. At present, most major cities adopt the model of kitchen waste pre-treatment + waste incineration power plant collaborative treatment. In the pre-treatment stage, the kitchen waste is first transported separately to the kitchen waste pre-treatment plant, where it is crushed and impurities are removed. 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 subjected to anaerobic fermentation, 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 organic matter will also produce more carbon dioxide and other gases when burned, which is not conducive to atmospheric governance;

[0010] A Chinese patent (CN102049407) discloses an industrial symbiotic system for the treatment of bulk urban solid waste. This system produces biomass-derived fuels by rationally blending 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, this symbiotic system primarily focuses on waste treatment, while its utilization remains largely unexplored.

[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 recycling, which has less pollutant emissions and higher utilization rate of kitchen waste.

[0013] The embodiments of the present invention are achieved through the following technical solutions:

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

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

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

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

[0018] Harvesting energy grass and sending 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, IoT technology is used to monitor the key operating parameters of the pre-treatment station, composting workshop, landfill, and incineration power plant, and to set normal ranges and warning values ​​for each key operating parameter. 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 output 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 based on 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 concentrations produced by the anaerobic digestion process in landfills and the harmful gases emitted by incineration power plants;

[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 based on the feed amount and composition analysis of food waste;

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

[0033] The irrigation system in the landfill's energy grass planting area is automatically adjusted based on 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 an integrated 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 when the processor executes the computer program, a method for processing kitchen waste based on green recycling is implemented.

[0043] A computer-readable storage medium is 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 solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0045] The embodiment of the present invention can fully decompose kitchen waste through the treatment method, and in the process of decomposing the kitchen waste, products such as solid residue, organic fertilizer, energy grass and green electricity are obtained, thereby making full use of the kitchen waste;

[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 following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

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

[0049] Figure 2 This 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] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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. Generally, the components of the embodiments of the present invention described and shown in the drawings herein 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 as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall 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, it does not need to be further defined or explained 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 in use. 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] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific contexts.

[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 pre-treatment station is equipped with equipment such as sorting machines, crushers, solid-liquid separators and anaerobic digesters, which are used to separate and crush the organic and inorganic matter 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 refractory organic matter such as cellulose and lignin, 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 nutrient content, making it suitable for direct use in agriculture.

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

[0063] 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 microorganisms decompose the organic matter in the solid slag to produce stable organic matter, that is, organic fertilizer. The solid slag can also be carbonized in a high-temperature environment. The high-temperature environment is achieved by the high-temperature steam delivered by the incineration power plant, thereby converting the solid slag into biochar, which is used 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 high-efficiency 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 to the soil to promote the growth of energy grass, the consumption of the composting workshop products is realized, and the soil quality can be improved, soil erosion can be prevented, and the ecological landscape can be enhanced. 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] Harvesting energy grass and sending it to incineration power plants;

[0070] Energy grass is a renewable biomass resource. Therefore, by planting and using energy grass to generate electricity, dependence on fossil fuels (such as coal, oil and natural gas) can be reduced. 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 to be carbon neutral during its life cycle.

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

[0072] In addition, data shows that the carbon emissions from the incineration of organic waste AD+ solid residue are 128.82kgCO2-eqt -1 , while AD+ solid residue compost 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 compost is used to improve the landfill soil, and energy grass is planted and then burned. Compared with direct incineration of FW for 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 generated by the incineration power plant is delivered 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, this 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 attachment Figure 2 ,This method also establishes a control strategy for controlling the cyclic operation of the pre-treatment station, composting plant, landfill and incineration power plant;

[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, IoT technology is used to monitor the key operating parameters of the pre-treatment station, composting workshop, landfill, and incineration power plant, and to set normal ranges and warning values ​​for each key operating parameter. When the monitoring data exceeds the warning value, the corresponding control measures are automatically triggered.

[0079] It should be noted that when using IoT 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 set normal range and warning values ​​of each key operating parameter, it can be linked to the control strategy; for example: when the temperature during the composting process is too high, the cooling system is started; when the humidity of the compost 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 compost 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 output 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 stations and composting workshops: 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 workshops and landfills: if it is predicted that the demand for organic fertilizers or soil conditioners will increase, the composting workshop should speed up production, and the landfill needs to prepare more space to accommodate these products; landfills and incineration power plants: if it is predicted that the output of energy grass will 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 concentrations produced by the anaerobic digestion process in landfills and the harmful gases emitted by incineration power plants;

[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 needed, the control strategy includes:

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

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

[0093] Automatically adjust the irrigation system for the landfill's energy grass planting area based on 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 any particular process. For example, if anaerobic digestion biogas production is predicted to be unstable, the feed composition of the pretreatment station can be adjusted to stabilize biogas production. Alternatively, historical and real-time data can be used to train predictive models, such as using time series analysis or machine learning algorithms to predict future derivative production. Based on the predicted results, the operating parameters of various facilities can be adjusted in advance. For example, if biogas production is predicted to increase in the next few days, the capacity of the anaerobic digester can be increased or the treatment efficiency can be improved in advance.

[0096] Example 3

[0097] A kitchen waste treatment system based on green circulation, combined with Figure 3 , including a pre-treatment station, a composting workshop, a landfill, an incineration power plant and an integrated management platform; the pre-treatment station is used to separate kitchen waste into solid residue and biogas residue; in addition, the pre-treatment 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, the various facilities are closely linked together, which not only enables energy transmission, material transfer and information flow chains between the various 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 needed, 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 excessive organic fertilizers or soil conditioners, which are difficult to effectively use without sufficient incineration processing capacity; and this can be achieved by adjusting the feed rate 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, some food waste can be sent to other temporary storage facilities and processed after the incineration power plant resumes operation.

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

[0108] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0109] If the integrated unit is implemented as 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 and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc., various media that can store program code.

[0110] Furthermore, this invention leverages the advantages of existing waste-to-energy systems to promote the sorting and recycling of kitchen waste. It establishes a "waste-to-fertilizer-to-grass-to-electricity" waste recycling model based on waste-to-energy incineration, as described in Examples 1-3. This model fully utilizes the functions and roles of existing environmental sanitation facilities, promoting resource recycling and development, and possesses both theoretical and practical significance.

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

[0112] Next, a food waste pretreatment system was constructed to physically stratify and collect food waste according to its properties. The oil phase was sold and disposed of to generate revenue, while the liquid phase underwent anaerobic fermentation to reduce its organic matter content and was incorporated into the leachate disposal system for compliant disposal in the incineration power generation model. The generated biogas could be flared or incorporated into the incinerator for utilization and disposal in the incineration power generation model. The solid phase was then disposed of in the aerobic composting model that was constructed next. The separated debris, which could not be fermented, was disposed of in the incinerator in the incineration power generation model.

[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 generated 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 lignocellulosic crops for energy are introduced for planting and management, while avoiding the planting of starch and fat energy crops that may cause harmful substances to flow into the biological cycle.

[0115] Finally, the energy-producing crops are harvested, dried, and processed in an incinerator system for incineration and power generation, generating green electricity. The green electricity generated by the waste incineration plant can be used in the aforementioned power-demanding processes, providing energy feedback. Furthermore, the steam generated can be used in composting facilities, among other applications.

[0116] The construction of these five nodes can fully leverage the role of waste incineration power plants in the management of domestic waste, providing material and energy, and preventing and controlling pollution. By achieving the recycling and utilization of food waste solids, introducing external energy, and controlling secondary pollution, this system expands the scope of the existing direct incineration model, clears bottlenecks in existing environmental sanitation practices, improves their respective utilization efficiency, and achieves pollution control through pollution control, thereby enhancing economic output and social benefits. This approach has strong practical application significance.

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

[0118] First, improving the efficiency of waste-to-energy plants. Since municipal solid 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 municipal solid waste collected and transported has been increasing year by year. Given the location and construction cycle of waste-to-energy plants, many regions have experienced a degree of over-construction of waste-to-energy plants. Xu Yakun conducted a DEA (data envelopment analysis) model analysis of 13 municipal solid waste incineration power generation BOT projects in Hunan Province and found that five of the 13 projects had varying degrees of investment redundancy. By expanding production scale, this investment redundancy could be effectively reduced and the project's efficiency improved. However, the output of municipal solid waste often fluctuates, sometimes even failing to meet the operating conditions of the incinerators. To ensure a minimum inventory level for incineration power generation facilities and improve the production efficiency of waste-to-energy plants, energy plants can be used to supplement them. According to research by Deng Suyuan and others, the calorific value of common energy-producing herbs in China ranges from 16.45 to 18.24 MJ / kg. Compared to the calorific value of standard coal at 29.3 MJ / kg, these herbs are approximately half that of standard coal, making them an effective supplement to waste-to-energy incineration fuel. Therefore, dynamically adding new energy-producing plants can supplement fuel for waste-to-energy plants, effectively addressing the issue of redundant construction and facilitating their stable operation. Furthermore, this can help improve incineration efficiency, reduce pollution emissions, and lower the cost of treating the oily leachate from food waste solids.

[0119] Second, it promotes the stabilization and restoration of landfills. By using soil conditioners and organic fertilizers to grow energy grass, we can help restore the ecology of sealed, in-situ landfills. This fully covers the surface of the landfill, increases soil organic matter, promotes the rapid and comprehensive recovery of vegetation, and fosters a healthy ecosystem. This helps prevent surface water from eroding landfill soil and reduces groundwater seepage. Furthermore, it helps continuously improve the fertility of landfill soil, increases energy grass production, and provides more ecological products.

[0120] Third, it facilitates the application of organic fertilizers and soil conditioners produced by food waste composting plants. The product distribution of food waste compost is a key factor influencing food waste compost production. This model provides a stable distribution path for compost products, enabling internal circulation of food waste compost within the environmental sanitation treatment system, eliminating the risk of heavy metal contamination. This not only complies with relevant national regulations but also fully utilizes food waste organic matter and biochar, promoting their high-value utilization. It also helps composting plants continuously improve the quality of their compost products and open up more product outlets.

[0121] Fourth, it helps reduce the cost of solid food waste disposal at food waste pretreatment plants. Incineration of solid food waste does not generate revenue, requiring disposal fees. However, after coarse waste crushing and three-phase separation, solid food waste has excellent composting properties and can be put into compost without additional pretreatment, generating greater revenue and thus reducing food waste disposal costs.

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

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

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

[0125] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for treating kitchen waste based on green recycling, characterized by: include: Collect kitchen waste and send it to the pre-treatment station to obtain solid residue and biogas residue; Solid residue and biogas residue are used as raw materials to produce organic fertilizer and soil conditioner in the composting workshop; Sending organic fertilizers and soil conditioners to landfills to grow energy grass; Harvesting energy grass and sending it to incineration power plants; The green electricity generated by the incineration power plant is delivered to the pre-treatment station and composting workshop, and the auxiliary equipment of the landfill can also be powered by the incineration power plant; Establish control strategies for the cycle operation of pre-treatment plants, composting plants, landfills and incineration power plants; Then, IoT technology is used to monitor the key operating parameters of the pre-treatment station, composting workshop, landfill, and incineration power plant, and to set normal ranges and warning values ​​for each key operating parameter. 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. This allows the optimal material allocation plan to be determined to avoid overcapacity or undercapacity in any particular link. The data model is trained using historical and real-time data, and is used to predict future derivative production. Based on the predicted results, the operating parameters of each facility can be adjusted in advance. Finally, the control strategy is adjusted in real time based on the difference between the predicted and actual yields of each derivative.

2. The method for treating kitchen waste based on green recycling according to claim 1, 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 concentrations produced by the anaerobic digestion process in landfills and the harmful gases emitted by incineration power plants; 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.

3. The method for treating kitchen waste based on green recycling according to claim 2, characterized in that: The control strategy includes: Automatically adjust the operating parameters of the crusher and impurity separator in the pre-treatment station based on the feed amount and composition analysis of food waste; Automatically adjust the ventilation and moisture addition systems in the composting room based on sensor data to maintain optimal composting conditions; The irrigation system in the landfill's energy grass planting area is automatically adjusted based on leachate production and soil conditioner needs.

4. The method for treating kitchen waste based on green recycling according to claim 1, characterized in that: The data model adopts a neural network model, a regression analysis model or a hybrid model.

5. A green recycling-based kitchen waste treatment system, 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 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.

6. The green recycling-based kitchen waste treatment system according to claim 5, 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.

7. The green recycling-based kitchen waste treatment system according to claim 5, characterized in that: The integrated management platform is also used to execute emergency strategies when a failure occurs in the incineration power plant.

8. 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, it implements a green-cycle-based kitchen waste treatment method as described in any one of claims 1-4.

9. 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 a green-cycle-based kitchen waste treatment method as described in any one of claims 1 to 4.

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