A low-carbon layout planning method and system for a municipal wastewater treatment plant

Abstract

The application provides a low-carbon layout planning method and system for a municipal wastewater treatment plant, and belongs to the technical field of layout of municipal wastewater treatment plants. The method comprises the following steps: obtaining demand information, supply information and resource utilization information within a range; taking the minimum construction and operation cost and the minimum carbon emission as targets, a multi-objective optimization model is constructed; obtaining the unit carbon emission control cost of the measures that can be taken in a preset area, the multi-objective optimization model is converted into a single economic cost minimization objective optimization model as a weighted coefficient, and the single economic cost minimization objective optimization model is solved to obtain the planning quantity, position, scale, sewage collection pipe network layout path and resource utilization path of the municipal wastewater treatment plant in the preset area, and the low-carbon layout planning of the municipal wastewater treatment plant is completed. The application solves the problem of how to reasonably layout the municipal wastewater treatment plant to control carbon emissions.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of urban sewage treatment plant layout, and particularly relates to a low-carbon layout planning method and system for an urban sewage treatment plant. BACKGROUND

[0002] Urban sewage treatment plants are the core infrastructure for alleviating urban water pollution, and their planning and construction are crucial for protecting the ecological environment and public health. However, the sewage collection and treatment process is high in energy consumption and accompanied by significant greenhouse gas emissions. In order to effectively control direct and indirect carbon emissions from the source, multiple factors need to be considered in the layout planning stage: not only traditional goals such as meeting sewage treatment needs, water environment carrying capacity, and economic cost, but also focusing on evaluating the systematic impact of treatment scale, sewage transportation distance, resource utilization, and other factors on carbon emissions.

[0003] However, the current planning and layout of urban sewage treatment plants mainly consider factors such as water environment protection, surrounding sensitive targets, economic cost, wind direction and topography, transportation conditions, and do not consider carbon emission control. Although existing technologies can take carbon emissions into account, they do not consider the greenhouse gas emission reduction benefits of reducing the production of corresponding water resources, energy, and other materials through reclaimed water utilization and sludge resource utilization. In addition, the SMART method, uncertain factor decision method, critical distance method, osculating value method, and grey situation decision method currently used for planning and layout mainly compare and select layout schemes through evaluation indexes, and the optimal solution determined by multi-objective decision methods is limited to the scheme itself and is not globally optimal, making it difficult to optimize carbon emissions in combination with external carbon emission reduction measures, thereby affecting the rationality of the planning and layout results.

[0004] Therefore, there is a need for a layout planning method that can comprehensively and systematically consider the impact of carbon emissions. SUMMARY

[0005] In view of the above deficiencies in the prior art, the present application provides a low-carbon layout planning method and system for an urban sewage treatment plant, which can scientifically and reasonably achieve optimal control of carbon emissions in the planning and layout of sewage treatment plants.

[0006] To achieve the above purpose, the technical solution adopted by the present application is as follows: a low-carbon layout planning method for an urban sewage treatment plant, comprising the following steps:

[0007] S1, obtaining demand information, supply information, and resource utilization information within a range;

[0008] S2, setting constraint conditions based on the demand information, supply information, and resource utilization information, and constructing a multi-objective optimization model with the minimum construction and operation cost and the minimum carbon emission as the target;

[0009] S3, obtain the carbon emission control cost of the unit that can take measures in the preset area, convert the multi-objective optimization model into a single economic cost minimization objective optimization model as a weighting coefficient, solve the single economic cost minimization objective optimization model, obtain the planning quantity, position, scale of the urban sewage treatment plant in the preset area, the layout path of the sewage collection pipe network and the resource utilization path, and complete the planning of the low-carbon layout of the urban sewage treatment plant.

[0010] Further, the demand information includes urban sewage discharge information, sewage collection pipe network information and rainwater quantity information; the supply information includes the buildable position of the urban sewage treatment plant, the maximum scale and the drainage direction information; and the resource utilization information includes the product type, yield, demand and transportation information of the sewage and sludge resource utilization.

[0011] Still further, the setting constraint condition comprises the following steps:

[0012] According to the demand information, the urban sewage discharge points are generalized, and the urban sewage treatment demand and urban sewage treatment capacity balance equation is constructed in combination with the supply information;

[0013] According to the resource utilization information, the parameters are determined , represents the demand quantity of the kth resource utilization product of the ith object; t f Set Qij represents the sewage flow rate of the ith urban sewage discharge point to the jth urban sewage treatment plant, then

[0014] i j , wherein, represents the sewage discharge quantity of the ith urban sewage discharge point, including the rainwater treatment demand entering the drainage system, i represents the scale of the jth urban sewage treatment plant, represents the maximum planning quantity of the sewage treatment plant, j represents the total number of the generalized urban sewage discharge points; m is an input parameter determined by the demand information, n is a variable to be solved, and the upper limit thereof is determined by the supply information; Set Qjkl represents the quantity of the kth resource utilization product of the jth urban sewage treatment plant to the lth object, then

[0015] j f t , wherein,​​​​​​​​​​​​​ represents the maximum number of demand objects in the resource utilization information, represents the first j class resource utilization product generation coefficient of the first f urban sewage treatment plant, and the parameter is determined by the yield information in the resource utilization information.

[0016] Further, the expression of the urban sewage treatment demand and urban sewage treatment capacity balance equation is as follows:

[0017] .

[0018] wherein, represents the sewage discharge amount of the first i urban sewage discharge point, including the rainwater treatment demand entering the drainage system, represents the scale of the first j urban sewage treatment plant.

[0019] Further, the expression of the construction and operation cost function of the multi-objective optimization model is as follows:

[0020] ;

[0021] wherein, represents the construction and operation cost function, represents the sewage pipe network collection cost function, represents the sewage treatment cost function, represents the resource utilization cost function, h represents the number of product types in the resource utilization information.

[0022] Further, the expression of the carbon emission function of the multi-objective optimization model is as follows:

[0023] ;

[0024] wherein, represents the carbon emission function, m represents the maximum planning number of sewage treatment plants, n represents the total number of urban sewage discharge points after generalization, represents the sewage pipe network carbon emission function, represents the sewage treatment carbon emission function, represents the maximum number of demand objects in the resource utilization information, h represents the number of product types in the resource utilization information, represents the resource utilization carbon emission function, represents the carbon emission function of the resource utilization alternative product. ​

[0025] Further, the expression of the single economic cost minimization target optimization model is as follows:

[0026]

[0027] wherein, represents an economic cost function, represents a unit carbon emission control cost, represents a construction and operation cost function, represents a carbon emission function.

[0028] The application also discloses a low-carbon layout planning system for a municipal sewage treatment plant.

[0029] An information input module is configured to acquire demand information, supply information and resource utilization information within a range;

[0030] A multi-target optimization model construction module is configured to set constraint conditions based on the demand information, the supply information and the resource utilization information, and to construct a multi-target optimization model with the minimum construction and operation cost and the minimum carbon emission as targets;

[0031] A municipal sewage treatment plant layout optimization module is configured to acquire a unit carbon emission control cost of a measure that can be taken in a preset area, to convert the multi-target optimization model into a single economic cost minimization target optimization model as a weighted coefficient, to solve the single economic cost minimization target optimization model, and to obtain the number, location, scale and sewage collection pipe network layout path and resource utilization path of the municipal sewage treatment plant in the preset area, thereby completing the planning of the low-carbon layout of the municipal sewage treatment plant.

[0032] The application has the following beneficial effects:

[0033] (1) The application acquires basic information from three aspects of municipal sewage collection, treatment and resource utilization, and sets constraints from two aspects of construction and operation cost and carbon emission, so that the low-carbon layout of the municipal sewage treatment plant can be planned scientifically and reasonably, and the carbon emission control of the whole process of municipal sewage collection, treatment and resource utilization can be realized. Meanwhile, the application introduces a carbon emission control cost, considers the cost of other carbon emission reduction paths such as carbon capture and storage in the layout planning of the municipal sewage treatment plant, and thus reasonably determines the optimal carbon emission control layout planning scheme of the municipal sewage treatment plant. In addition, the multi-target optimization is converted into single-target optimization for solving by taking the unit carbon emission control cost as a weighted coefficient, which can reduce the calculation difficulty and time of the layout planning scheme, and is conducive to the application and popularization of the low-carbon layout planning method of the municipal sewage treatment plant. The application aims to realize the collaborative optimization of environmental benefits, economic feasibility and carbon emission control, and ultimately promote the collaborative governance of pollution reduction and carbon reduction.

[0034] ​(2) The present application considers carbon emission as one of the influencing factors of the layout of the urban sewage treatment plant, and optimizes the layout with the minimum carbon emission as the target.

[0035] (3) By introducing the unit carbon emission control cost, the carbon emission right transaction, the carbon capture and storage technology, the low-carbon process and equipment and other external carbon emission reduction measures are optimized, and then the optimal carbon emission control sewage treatment plant layout scheme is obtained, and the economic feasibility of the layout scheme is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The method flowchart of the present application.

[0037] Figure 2 The topology diagram of the layout planning object of the urban sewage treatment plant.

[0038] Figure 3 The system structure schematic diagram of the present application. DETAILED DESCRIPTION

[0039] The specific embodiments of the present application are described below to facilitate those skilled in the art to understand the present application, but it should be clear that the present application is not limited to the scope of the specific embodiments, and for those skilled in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the appended claims, these changes are obvious, and all the inventions utilizing the concept of the present application are within the scope of protection.

[0040] Example 1

[0041] As shown in the Figure 1 The present application provides a low-carbon layout planning method for urban sewage treatment plants, and the implementation method is as follows:

[0042] S1, obtaining the demand information, supply information and resource utilization information in the range;

[0043] In this embodiment, the demand information includes urban sewage discharge information, sewage collection pipe network information and rainwater quantity information; the supply information includes urban sewage treatment plant buildable location, maximum scale and drainage destination information; the resource utilization information includes sewage, sludge resource utilization product type, yield, demand and transportation information.

[0044] In this embodiment, the information obtained includes current level year information and planning level year information. The demand information for the planning level year is obtained through socio-economic development forecasts within the scope. The supply information for the planning level year is obtained based on the optional urban sewage treatment plant planning layout schemes determined by various factors such as land spatial layout, water environment protection, sanitary protection distance, surrounding sensitive targets, economic costs, wind direction and topography, and transportation conditions. The resource utilization information for the planning level year is obtained through special development plans within the scope.

[0045] In this embodiment, the topological map of the urban wastewater treatment plant layout planning object drawn based on the information within the acquired range is as follows: Figure 2 As shown, settings Indicates the first i The sewage discharge volume (in ten thousand m³) at each urban sewage discharge point, including the rainwater treatment requirements entering the drainage system; Indicates the first j The scale of each town's wastewater treatment plant (10,000 m³ / d). Indicates the first t The first object f The demand for products related to resource utilization. Indicates the first i The sewage discharge points in the city are transported to the first j Wastewater flow rate (10,000 m³ / d) of a town wastewater treatment plant. Indicates the first j The first urban sewage treatment plant f Resource-based products are transported to the first t The number of objects.

[0046] S2. Based on demand information, supply information and resource utilization information, set constraints and construct a multi-objective optimization model with the goals of minimizing construction and operation costs and minimizing carbon emissions;

[0047] In this embodiment, setting constraints includes the following steps:

[0048] Based on demand information, urban sewage discharge points are generalized, and combined with supply information, a balance equation between urban sewage treatment demand and urban sewage treatment capacity is constructed:

[0049] ;

[0050] in, Indicates the first i The amount of sewage discharged from each urban sewage discharge point, including the rainwater treatment needs entering the drainage system. Indicates the first j The scale of a town's wastewater treatment plant.

[0051] Parameters are determined based on resource utilization information. , represents the number of the first t type of resource utilization products required by the first f object;

[0052] Set Qij represents the wastewater flow rate from the first i municipal wastewater discharge point to the first j municipal wastewater treatment plant, then ; , wherein Qij represents the wastewater discharge amount of the first i municipal wastewater discharge point, including the rainwater treatment demand entering the drainage system, Qij represents the scale of the first j municipal wastewater treatment plant, m Qij represents the maximum planned number of wastewater treatment plants, n Qij represents the total number of municipal wastewater discharge points after generalization; is an input parameter determined by demand information, is a variable to be solved, and the upper limit is determined by supply information;

[0053] Set Qij represents the number of the first j type of resource utilization products from the first f municipal wastewater treatment plant to the first t object, then ; , wherein Qij represents the maximum number of demand objects in the resource utilization information, Qij represents the first j type of resource utilization product generation coefficient of the first f municipal wastewater treatment plant, and this parameter is determined by the yield information in the resource utilization information.

[0054] In this embodiment, the design assumes full collection and treatment of urban sewage, with sewage discharge and treatment capacity in balance. Due to technological and demand limitations, sewage and sludge may not achieve complete resource utilization; therefore, the production capacity of resource-utilized products is unequal to the demand, with demand less than or equal to production capacity. Furthermore, influenced by factors such as land use planning, water environment protection, sanitary protection distances, surrounding sensitive targets, economic costs, wind direction and topography, and transportation conditions, there are maximum size constraints for urban sewage treatment plants in different feasible locations. Construction and operation costs include the construction and operation costs of the entire sewage collection, treatment, and resource utilization process. Carbon emissions include carbon emissions from the entire sewage collection, treatment, and resource utilization process, minus the carbon reduction benefits generated by resource utilization substitution. Carbon emissions from wastewater collection mainly include greenhouse gases such as methane and nitrous oxide generated during the transportation of urban wastewater through pipe networks. Carbon emissions from wastewater treatment mainly consist of indirect carbon emissions from energy and chemical consumption at urban wastewater treatment plants, and direct greenhouse gas emissions from pollutant reduction. Carbon emissions from resource utilization include energy consumption and direct greenhouse gas emissions during the production and transportation of resource-utilized products. Carbon reduction benefits from resource utilization substitution include energy consumption and direct greenhouse gas emissions during the production and transportation of substitute products. Furthermore, the scope of carbon accounting can be adjusted to include carbon emissions throughout the entire life cycle of relevant engineering construction or production / consumption phases within the accounting boundary.

[0055] In this embodiment, the constraints of the multi-objective optimization model are:

[0056] ;

[0057] ;

[0058] ;

[0059] ;

[0060] ;

[0061] ;

[0062] in, Indicates the first j The maximum possible scale for the construction of a town wastewater treatment plant Indicates the first j The first urban sewage treatment plant f The production coefficient of resource utilization products is calculated. In this example, two types of resource utilization products, reclaimed water and nutrient soil, are considered. The production capacity of resource utilization products is determined based on the reclaimed water utilization rate and the sludge production per unit of wastewater treatment.

[0063] In this embodiment, the objective equation is constructed with the goal of minimizing the construction and operation cost, including the sewage pipe network collection cost, sewage treatment cost, and resource utilization cost:

[0064] ;

[0065] wherein, represents the construction and operation cost function, represents the sewage pipe network collection cost function, which is determined by factors such as sewage flow, transportation distance, construction conditions, and pipe material of the sewage pipe network, and is calculated according to the unit cost of sewage transportation, represents the sewage treatment cost function, which is closely related to the sewage treatment scale and should reflect the efficiency improvement brought by scale effect, and a power function is used to construct the equation, represents the resource utilization cost function, which is determined according to the construction and operation cost of resource utilization facilities and the product transportation cost to construct the equation.

[0066] In this embodiment, the expression of the carbon emission function of the multi-objective optimization model is as follows:

[0067] .

[0068] In this embodiment, the objective equation is constructed with the goal of minimizing the carbon emission in the operation process, including the sewage pipe network carbon emission, sewage treatment carbon emission, and resource utilization carbon emission, and deducting the corresponding alternative carbon emission reduction benefits:

[0069] ;

[0070] wherein, represents the carbon emission function, represents the sewage pipe network carbon emission function, which is determined by multiple factors such as pipe hydraulic conditions, sewage characteristics, and temperature of the sewage pipe network, and is directly related to the sewage flow in the pipe network, and an empirical formula is used to construct the equation, represents the sewage treatment carbon emission function, the indirect carbon emission is closely related to the sewage treatment scale, and should reflect the efficiency improvement brought by scale effect, and a power function is also used to construct the equation; the direct carbon emission is directly related to the influent and effluent water pollutant concentration and sewage treatment process technology, and is calculated by the emission factor method, represents the resource utilization carbon emission function, for sewage recycling carbon emission, including the direct and indirect carbon emission of increasing the sewage treatment unit, and the carbon emission in the recycled water transportation process; for the carbon emission of preparing nutrient soil with sludge as raw material, including the carbon emission in the preparation process and the product transportation process, The carbon emission function represents the resource utilization alternative product, and the carbon emission of tap water alternative includes the direct and indirect carbon emission of natural water use, tap water preparation and transportation process; the carbon emission of other process nutrient soil alternative to sludge as raw material includes the carbon emission of preparation process and product transportation process.

[0071] S3, obtain the unit carbon emission control cost of the preset area that can take measures, convert the multi-objective optimization model into a single economic cost minimization objective optimization model as a weighting coefficient, and solve the single economic cost minimization objective optimization model to obtain the planning quantity, location, scale of the urban sewage treatment plant in the preset area, the layout path of the sewage collection pipe network and the resource utilization path, and complete the planning of the low-carbon layout of the urban sewage treatment plant.

[0072] In this embodiment, the multi-objective problem is optimized and solved, and the result is limited to the scheme itself, which cannot comprehensively consider the cost of other carbon emission reduction paths such as carbon capture and storage, and it is difficult to comprehensively determine the optimal scheme to determine the carbon emission control target. Therefore, on this basis, the unit carbon emission control cost is introduced, the carbon emission minimization objective is converted into a carbon emission cost minimization objective, and the construction and operation cost minimization objective is combined into a single economic cost minimization objective:

[0073] ;

[0074] Among them, The economic cost function is represented by The unit carbon emission control cost refers to the cost of unit carbon emission or the cost of unit carbon emission reduction, The construction and operation cost function is represented by The carbon emission function is represented by

[0075] In this embodiment, the measures that can be taken include but are not limited to carbon emission right trading, carbon capture and storage technology, low-carbon process and equipment, etc., and the corresponding carbon market price, carbon capture and storage technology cost, low-carbon process and equipment transformation cost are used as the unit carbon emission control cost.

[0076] In this embodiment, the general direct air capture technology is used as an alternative, and the average carbon emission control cost (U) is about 200-600 dollars / ton .

[0077] Finally, the single-objective optimization model is solved by using Newton method to obtain the layout of the urban sewage treatment plant in the preset area, and the optimal scheme is output. The practical significance of the optimal scheme is that the carbon emission is controlled at the economic optimum level through the optimized layout of the urban sewage treatment plant, and at this time, the cost of further reducing carbon emission is higher than the unit carbon emission control cost, which represents that if further carbon emission reduction is needed, alternative carbon emission reduction measures can be taken.

[0078] In summary, the present application obtains basic information from three aspects of urban sewage collection, treatment and resource utilization, and is constrained from two aspects of construction and operation cost and carbon emission, so that the low-carbon layout of urban sewage treatment plant can be planned scientifically and reasonably, which is conducive to realizing carbon emission control in the whole process of urban sewage collection, treatment and resource utilization. At the same time, the present application also introduces carbon emission control cost, considers the cost of other carbon emission reduction paths such as carbon capture and storage in the layout planning of urban sewage treatment plant, so as to reasonably determine the optimal carbon emission control planning layout scheme of the sewage treatment plant. In addition, the multi-objective optimization is converted into single-objective optimization for solving by taking the unit carbon emission control cost as the weighting coefficient, which can reduce the calculation difficulty and time of the layout planning scheme, and is conducive to the application and popularization of the low-carbon layout planning method of urban sewage treatment plant.

[0079] Example 2

[0080] As shown in Figure 3 The present application provides a low-carbon layout planning system of urban sewage treatment plant, which is used for executing the low-carbon layout planning method of urban sewage treatment plant described in embodiment 1, and comprises:

[0081] An information input module is configured to obtain demand information, supply information and resource utilization information within a range;

[0082] A multi-objective optimization model construction module is configured to set constraint conditions based on the demand information, the supply information and the resource utilization information, and to construct a multi-objective optimization model with the minimum construction and operation cost and the minimum carbon emission as the target;

[0083] A urban sewage treatment plant layout optimization module is configured to obtain the unit carbon emission control cost of the measures that can be taken in the preset area, to convert the multi-objective optimization model into a single economic cost minimization target optimization model as a weighting coefficient, and to solve the single economic cost minimization target optimization model to obtain the planning quantity, location, scale and sewage collection pipe network layout path and resource utilization path of the urban sewage treatment plant in the preset area, and to complete the planning of the low-carbon layout of the urban sewage treatment plant.

[0084] In this embodiment, the application can divide the functions into functional units according to the low-carbon layout planning method of the urban sewage treatment plant. For example, each function can be divided into a functional unit, or two or more functions can be integrated into one processing unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit. It should be noted that the division of the unit in the present application is illustrative, and is only a logical division. In actual implementation, there can be another division method.

[0085] In this embodiment, in order to realize the principles and beneficial effects of the low-carbon layout planning method of the urban sewage treatment plant, the low-carbon layout planning system of the urban sewage treatment plant comprises a hardware structure and / or a software module corresponding to each function. Those skilled in the art should easily realize that, in combination with the description of each schematic unit and algorithm steps of the embodiments disclosed in the present application, the present application can be realized in the form of hardware and / or a combination of hardware and computer software. Whether a certain function is executed in the form of hardware or computer software depends on the specific application and design constraints of the technical solution. Different methods can be used to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

Claims

1. A method for low-carbon layout planning of a municipal wastewater treatment plant, characterized in that, The method comprises the following steps: S1, obtaining demand information, supply information and resource utilization information within a range; S2, setting constraint conditions based on the demand information, the supply information and the resource utilization information, and constructing a multi-objective optimization model with the minimum construction and operation cost and the minimum carbon emission as the target; The setting of the constraint conditions comprises the following steps: generalizing urban sewage discharge points according to the demand information, and constructing a balance equation of urban sewage treatment demand and urban sewage treatment capacity in combination with the supply information; Determining parameters from resource utilization information , represents the number of resource utilization products of the first t object of the first f category required; set up Representing the i The sewage discharge points in the city are transported to the first j The sewage flow rate of each town's sewage treatment plant, ; ,in, Indicates the first i The amount of sewage discharged from each urban sewage discharge point, including the rainwater treatment needs entering the drainage system. Indicates the first j The scale of a town's wastewater treatment plant m This indicates the maximum planned number of wastewater treatment plants. n This represents the generalized total number of urban sewage discharge points. The input parameters are determined by the requirement information. These are the variables that need to be solved, and their upper limits are determined by supply information; Set represent the first j class of resource utilization products of the first f municipal sewage treatment plant to the first t object quantity, then ; , wherein indicates the maximum number of demand objects in the resource utilization information, indicates the first j class of resource utilization product generation coefficient of the first f municipal sewage treatment plant, and the parameter is determined by the yield information in the resource utilization information; S3, obtaining the unit carbon emission control cost of the measures that can be taken in the preset area, taking the multi-objective optimization model as a single economic cost minimization target optimization model as a weighting coefficient, and solving the single economic cost minimization target optimization model to obtain the planned number, location, scale of the urban sewage treatment plant, the sewage collection pipe network layout path and the resource utilization path in the preset area, and complete the planning of the low-carbon layout of the urban sewage treatment plant; The expression of the single economic cost minimization target optimization model is as follows: ； wherein, represents an economic cost function, represents a unit carbon emission control cost, represents a construction and operation cost function, represents a carbon emission function.

2. The low-carbon layout planning method for a municipal wastewater treatment plant according to claim 1, characterized in that, The demand information includes urban sewage discharge information, sewage collection pipe network information and rainwater information; the supply information includes the maximum scale and drainage direction information of the urban sewage treatment plant; and the resource utilization information includes the product type, yield, demand and transportation information of the sewage and sludge resource utilization.

3. The method for low-carbon layout planning of a municipal wastewater treatment plant according to claim 1, characterized in that, The expression of the balance equation of the urban sewage treatment demand and the urban sewage treatment capacity is as follows: 。 4. The low-carbon layout planning method for a municipal wastewater treatment plant according to claim 1, characterized in that, The expression of the construction and operation cost function of the multi-objective optimization model is as follows: ； wherein, represents a construction and operation cost function, represents a sewer network collection cost function, represents a sewage treatment cost function, represents a resource utilization cost function, h represents the number of product types in the resource utilization information.

5. The method for low-carbon layout planning of a municipal wastewater treatment plant according to claim 1, characterized in that, The expression of the carbon emission function of the multi-objective optimization model is as follows: ； wherein, represents the carbon emission function, m represents the maximum planned number of wastewater treatment plants, n represents the total number of generalized urban wastewater discharge points, represents the wastewater pipe network carbon emission function, represents the wastewater treatment carbon emission function, represents the maximum number of demand objects in the resource utilization information, h represents the number of product types in the resource utilization information, represents the resource utilization carbon emission function, represents the carbon emission function of the resource utilization alternative product.

6. A low-carbon layout planning system for a municipal wastewater treatment plant, configured to perform the low-carbon layout planning method for a municipal wastewater treatment plant according to any one of claims 1-5, characterized in that, The method comprises the following steps: an information input module for obtaining demand information, supply information and resource utilization information within a range; a multi-objective optimization model construction module for setting constraint conditions based on the demand information, the supply information and the resource utilization information, and constructing a multi-objective optimization model with the minimum construction and operation cost and the minimum carbon emission as the target; The setting of the constraint conditions comprises the following steps: generalizing urban sewage discharge points according to the demand information, and constructing a balance equation of urban sewage treatment demand and urban sewage treatment capacity in combination with the supply information; Parameters are determined based on resource utilization information. , Indicates the first t The first object f The demand for resource-based utilization products; set up Representing the i The sewage discharge points in the city are transported to the first j The sewage flow rate of each town's sewage treatment plant, ; ,in, Indicates the first i The amount of sewage discharged from each urban sewage discharge point, including the rainwater treatment needs entering the drainage system. Indicates the first j The scale of a town's wastewater treatment plant m This indicates the maximum planned number of wastewater treatment plants. n This represents the generalized total number of urban sewage discharge points. The input parameters are determined by the requirement information. These are the variables that need to be solved, and their upper limits are determined by supply information; set up Representing the j The first urban sewage treatment plant f Resource-based products are transported to the first t The number of objects, then ; ,in, This indicates the maximum number of demand objects in the resource utilization information. Indicates the first j The first urban sewage treatment plant f The product generation coefficient of resource utilization products, The parameters are determined by the production information in the resource utilization information; an urban sewage treatment plant planning layout optimization module for obtaining the unit carbon emission control cost of the measures that can be taken in the preset area, taking the multi-objective optimization model as a single economic cost minimization target optimization model as a weighting coefficient, and solving the single economic cost minimization target optimization model to obtain the planned number, location, scale of the urban sewage treatment plant, the sewage collection pipe network layout path and the resource utilization path in the preset area, and complete the planning of the low-carbon layout of the urban sewage treatment plant; The expression of the single economic cost minimization target optimization model is as follows: ； wherein, represents an economic cost function, represents a unit carbon emission control cost, represents a construction and operation cost function, represents a carbon emission function.

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