Environmental influence assessment method and equipment for sewage treatment process and storage medium

Abstract

The invention relates to the technical field of sewage treatment, and provides an environmental impact assessment method and device for sewage treatment processes and a storage medium, and the method comprises the steps: obtaining first sewage treatment data of a first sewage treatment process and second sewage treatment data of a second sewage treatment process, the first input-output table of the first area and the second input-output table of the second area correspond to the first sewage treatment process; determining a corresponding total factor productivity change rate according to the first sewage treatment data and the second sewage treatment data; according to the first sewage treatment data and the first input-output table, constructing a first target input-output table of the first area; constructing a second target input-output table of the second area according to the second input-output table and the first target input-output table; and according to the total factor productivity change rate and the second target input-output table, evaluating the environmental influence. According to the invention, the environmental influence of the second sewage treatment process on the whole industrial chain relative to the first sewage treatment process can be evaluated.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to an environmental impact assessment method, equipment and storage medium for a sewage treatment process. Background Art

[0002] Traditional sewage treatment plants remove pollutants from water at the cost of energy and resource consumption. Although this improves water quality to a certain extent, it also brings some environmental problems (such as high carbon emissions) due to high energy consumption and the use of a large number of chemical agents. With the increasing awareness of environmental protection and the continuous advancement of science and technology, sewage treatment technology is gradually transforming towards high efficiency, low consumption and low carbon. New sewage treatment technologies such as advanced oxidation, membrane treatment, and bio-enhanced treatment are constantly emerging.

[0003] Advances in sewage treatment technology can produce two effects: upstream mitigation and downstream stimulation. (1) On the one hand, advances in sewage treatment technology can improve sewage treatment efficiency and reduce the demand for material inputs in the upstream of the industrial chain, thereby promoting the reduction of pollutant / greenhouse gas emissions in the upstream production sectors of the industrial chain and mitigating environmental impacts. (2) On the other hand, advances in sewage treatment technology can reduce the cost and price of unit sewage treatment services, stimulating the demand for sewage treatment services in the downstream industries of the industrial chain. The increase in demand in the downstream of the industrial chain will further promote the increase in output of related industries, thereby generating more pollutant / greenhouse gas emissions and increasing environmental impacts.

[0004] The existing research on the environmental impact of advances in sewage treatment technology is not detailed and comprehensive enough, and it is difficult to accurately reflect the comprehensive impact of advances in sewage treatment technology, resulting in incomplete and low-accuracy assessment results of environmental impacts. Summary of the invention

[0005] The main purpose of this application is to provide an environmental impact assessment method, equipment and storage medium for a sewage treatment process, which can assess the environmental impact of a second sewage treatment process on the entire industrial chain relative to a first sewage treatment process.

[0006] In a first aspect, the present application provides an environmental impact assessment method for a sewage treatment process, comprising:

[0007] Acquire first sewage treatment data corresponding to a first sewage treatment process, second sewage treatment data corresponding to a second sewage treatment process, and a first input-output table of a first area and a second input-output table of a second area corresponding to the first sewage treatment process; the area range of the second area includes the area range of the first area;

[0008] Determining a total factor productivity change rate of the second sewage treatment process relative to the first sewage treatment process based on the first sewage treatment data and the second sewage treatment data;

[0009] Constructing a first target input-output table for the first area according to the first sewage treatment data and the first input-output table;

[0010] Constructing a second target input-output table for the second region according to the second input-output table and the first target input-output table;

[0011] According to the total factor productivity change rate and the second target input-output table, the environmental impact corresponding to the second sewage treatment process is evaluated.

[0012] In a second aspect, the present application further provides a computer device, the computer device comprising a memory and a processor;

[0013] The memory is used to store computer programs;

[0014] The processor is used to execute the computer program and implement the environmental impact assessment method of the sewage treatment process as described above when executing the computer program.

[0015] In a third aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the environmental impact assessment method for a sewage treatment process as described above are implemented.

[0016] The present application provides an environmental impact assessment method, device and storage medium for a sewage treatment process, wherein the method includes: obtaining first sewage treatment data corresponding to a first sewage treatment process, second sewage treatment data corresponding to a second sewage treatment process, and a first input-output table of a first area and a second input-output table of a second area corresponding to the first sewage treatment process; the area range of the second area includes the area range of the first area; determining the total factor productivity change rate of the second sewage treatment process relative to the first sewage treatment process based on the first sewage treatment data and the second sewage treatment data; constructing a first target input-output table of the first area based on the first sewage treatment data and the first input-output table; constructing a second target input-output table of the second area based on the second input-output table and the first target input-output table; and evaluating the environmental impact corresponding to the second sewage treatment process based on the total factor productivity change rate and the second target input-output table. This application obtains a first target input-output table that can reflect the impact of the sewage treatment process on the economic activities of each industry based on the first sewage treatment data and the first input-output table that reflects the relationship between the economic activities of each industry; then, based on the first target input-output table and the second input-output table, obtains a second target input-output table that can reflect the impact of the sewage treatment process on the economic activities of each industry in a larger regional scope; then, by quantifying the change rate of total factor productivity of the second sewage treatment process relative to the first sewage treatment process, and the second target input-output table, the environmental impact of the second sewage treatment process on the entire industrial chain relative to the first sewage treatment process can be evaluated. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of a flow chart of an environmental impact assessment method for a sewage treatment process provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of a first target input-output table provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of a second target input-output table provided in an embodiment of the present application;

[0021] Figure 4 A schematic block diagram of the structure of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0024] The embodiment of the present application provides an environmental impact assessment method, device and storage medium for a sewage treatment process. Among them, the environmental impact assessment method of the sewage treatment process can be applied to a terminal device, which can be a mobile phone, a tablet computer, a laptop computer, a desktop computer and other devices. It can also be applied to a server, which can be a separate server or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (Content Delivery Network, CDN), and big data and artificial intelligence platforms.

[0025] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0026] See also Figure 1 , Figure 1 A schematic diagram of a flow chart of an environmental impact assessment method for a sewage treatment process provided in an embodiment of the present application. It should be noted that the environmental impact assessment method for a sewage treatment process provided in an embodiment of the present application can be used in a terminal device, and of course can also be used in a server.

[0027] like Figure 1 As shown, the environmental impact assessment method of the sewage treatment process includes steps S101 to S105.

[0028] Step S101, obtaining first sewage treatment data corresponding to the first sewage treatment process, second sewage treatment data corresponding to the second sewage treatment process, and a first input-output table of the first area and a second input-output table of the second area corresponding to the first sewage treatment process; the area range of the second area includes the area range of the first area.

[0029] For example, the first sewage treatment process is different from the second sewage treatment process, for example, the processes are different and the application time is different. Furthermore, the second sewage treatment process can be improved by the first sewage treatment process. With the advancement of science and technology, sewage treatment processes are constantly increasing, and sewage treatment processes are also constantly improving. The embodiment of the present application takes the first sewage treatment process as the benchmark sewage treatment process, and the second sewage treatment process is the improved sewage treatment process. Of course, there will also be a third sewage treatment process, a fourth sewage treatment process, and the like in actual applications. In general, sewage treatment processes with good effects will gradually replace sewage treatment processes with poor effects, and different sewage treatment processes have different impacts on the environment. The embodiment of the present application can take the first sewage treatment process as a benchmark to evaluate the environmental impact corresponding to the improved second sewage treatment process.

[0030] The embodiment of the present application obtains the input-output table of the first region corresponding to the first sewage treatment process and the second input-output table of the second region, so as to obtain the connection between the economic activities of various industries in the first region with different regional scopes and the connection between the economic activities of various industries in the second region under the influence of the first sewage treatment process. It is understandable that the regional scope of the second region may include the regional scope of the first region. For example, the regional scope of the second region may be much larger than the regional scope of the first region. The first region may be a certain country region (China), and the second region may include multiple country regions (such as countries around the world). By obtaining different input-output tables with large differences in regional scope, the connection between the economic activities of various industries can be accurately reflected.

[0031] In an exemplary embodiment, the first sewage treatment data and the second sewage treatment data both include at least one of the following: capital input, labor input, energy usage, chemical consumption, sewage treatment volume, comprehensive sewage treatment efficiency, pollutant emissions, and greenhouse gas emissions.

[0032] For example, sewage treatment data used for sewage treatment can be divided into input data and output data. Input data can be understood as the cost data of the sewage treatment process. For example, capital input, labor input, energy usage, and chemical consumption. Output data can be understood as the substances discharged externally when using the sewage treatment process and the impacts caused. For example, sewage treatment volume, comprehensive sewage treatment efficiency, pollutant emissions, greenhouse gas emissions, etc.

[0033] The embodiment of the present application can obtain the first sewage treatment data such as capital input, labor input, energy usage, chemical consumption, sewage treatment volume, comprehensive sewage treatment efficiency, pollutant emissions, and greenhouse gas emissions corresponding to the first sewage treatment process, as well as the capital input, labor input, energy usage, chemical consumption, sewage treatment volume, comprehensive sewage treatment efficiency, pollutant emissions, and greenhouse gas emissions corresponding to the second sewage treatment process.

[0034] Among them, energy usage refers to the electricity, gas and other energy consumed by the sewage treatment plant during operation; the actual energy usage can be obtained by real-time monitoring of energy consumption through monitoring equipment. Chemical agent consumption refers to the consumption of agents used by the sewage treatment plant in the process of treating sewage, such as coagulants, flocculants, disinfectants, etc. Comprehensive treatment efficiency refers to an important indicator for measuring the effect of sewage treatment, which is generally calculated based on the comparison between the effluent quality and the influent quality. Pollutant emissions refer to the amount of pollutants discharged into the natural environment by the sewage treatment plant during the treatment process; the effluent quality is generally monitored by water quality monitoring equipment to obtain the amount of pollution discharged. Greenhouse gas emissions refer to the emissions of greenhouse gases such as carbon dioxide generated by the sewage treatment plant during operation; generally, carbon emissions are obtained by real-time monitoring of monitoring instruments.

[0035] Step S102: Determine the total factor productivity change rate of the second sewage treatment process relative to the first sewage treatment process based on the first sewage treatment data and the second sewage treatment data.

[0036] After obtaining the first sewage treatment data and the second sewage treatment data, the total factor productivity change rate before and after the sewage treatment process is improved can be determined based on the first sewage treatment data and the second sewage treatment data, that is, the total factor productivity change rate of the second sewage treatment process relative to the first sewage treatment process.

[0037] For example, an embodiment of the present application can calculate the total factor productivity change rate △TFP of the second sewage treatment process relative to the first sewage treatment process based on the DEA-Malmquist productivity index method. It should be noted that the DEA-Malmquist productivity index method is a performance evaluation method based on the combination of data envelopment analysis (DEA) and the Malmquist index method. Data envelopment analysis is a non-parametric efficiency evaluation method that evaluates the technical efficiency of multiple decision-making units by comparing the input data and output data of these decision-making units. The Malmquist index method is a method for comparing the changes in unit technical efficiency at two time points. It calculates the ratio of its technological progress rate and technical efficiency change rate based on the changes in the production frontier of each unit at two time points.

[0038] Specifically, the technical efficiency of the first sewage treatment process and the second sewage treatment process under given input-output conditions can be determined first, and then the total factor productivity change rate △TFP of the second sewage treatment process relative to the first sewage treatment process can be calculated.

[0039] Data envelopment analysis is performed on the second sewage treatment process relative to the first sewage treatment process to calculate the technical efficiency. The data envelopment analysis model is as follows:

[0040]

[0041] θ j represents the technical efficiency of sewage treatment plant j; j represents the weight of sewage treatment plant j; x ij represents the input data i of sewage treatment plant j; y rj represents the output data r of sewage treatment plant j; m represents the number of input data; t represents the period of application of sewage treatment process; s represents the number of output data; n represents the number of sewage treatment plants.

[0042] By solving the above data envelopment analysis model, the technical efficiency of each sewage treatment plant under given input-output conditions can be obtained when using the corresponding sewage treatment process.

[0043] After obtaining the technical efficiency based on the envelope analysis model, the Malmquist index method can be used to calculate the △TFP of the total factor productivity change rate of the second sewage treatment process relative to the first sewage treatment process. It can be understood that the Malmquist index reflects the change in total factor productivity from period t to period t+1. The specific calculation process is as follows:

[0044] Defining the distance function is the inverse of technical efficiency, that is:

[0045]

[0046] It represents the technical efficiency of the production point (xt, yt) under the sewage treatment process in period t.

[0047] The △TFP of the rate of change of total factor productivity is calculated based on the distance function as follows:

[0048]

[0049] It represents the distance function of the sewage treatment plant in period t under the first sewage treatment process in period t, that is, the technical efficiency of the sewage treatment plant production point (xt, yt) in period t; represents the distance function of the sewage treatment plant in period t+1 under the first sewage treatment process in period t, that is, the technical efficiency of the production point of the sewage treatment plant in period t+1 measured by the technical frontier of period t; It represents the technical efficiency of the production point of the sewage treatment plant in period t measured by the technical frontier in period t+1; It represents the distance function of the sewage treatment plant at period t+1 under the second sewage treatment process at period t+1.

[0050] Step S103: construct a first target input-output table for the first area according to the first sewage treatment data and the first input-output table.

[0051] For example, the first region can be a certain country region (such as China), and the embodiment of the present application can obtain a first input-output table that records the connection between the economic activities of various industries from the economic reports of various industries published by some research teams. Generally, the first input-output table will integrate the data related to sewage treatment. Based on this, the embodiment of the present application can adjust the first input-output table based on the first sewage treatment data corresponding to the first sewage treatment process to construct a first target input-output table, that is, a multi-regional input-output table of China including the subdivision of the sewage treatment department.

[0052] In an exemplary embodiment, the first input-output table includes department data related to the sewage treatment process, and step S103 may include: step S301 and step S302.

[0053] Step S301: According to the first sewage treatment data, the department data related to the sewage treatment process in the first input-output table is split to obtain the first department data and the second department data; the first department data includes the data corresponding to the sewage treatment department, and the second department data includes the data corresponding to the departments other than the sewage treatment department.

[0054] Step S302: reorganize the first department data and the second department data to obtain a first target input-output table for the first region.

[0055] For example, the first input-output table may include department data corresponding to departments related to the sewage treatment process. For example, departments related to the sewage treatment process may include water production and supply departments. Department data related to the sewage treatment process may include data corresponding to water production and supply departments.

[0056] like Figure 2As shown, the embodiment of the present application can split the departments related to the sewage treatment process in the first input-output table according to the acquired first sewage treatment data. Specifically, taking China as an example, the department w involving sewage treatment in the first input-output table released by some research teams can be split into an independent sewage treatment department and multiple remaining departments 1~w'. Taking the water production and supply department as an example, the sewage treatment department is split out from the water production and supply department. After the sewage treatment department is split out, the remaining department in the water production and supply department except the sewage treatment department is w', thereby splitting and obtaining the first department data corresponding to the independent sewage treatment department and the second department data corresponding to the remaining departments in the water production and supply department except the sewage treatment department.

[0057] After the split, the data of the first department and the second department need to be reorganized to obtain the first target input-output table of the first area to ensure the accuracy of the data of each department after the split and accurately reflect the economic connection between the departments. The first department data corresponding to the sewage treatment department is independently integrated into the table, which can comprehensively and accurately reflect the comprehensive impact before and after the improvement of sewage treatment technology.

[0058] Specifically, for other departments in the first input-output table, it is necessary to determine their input-output relationships with the sewage treatment department, and redefine these relationships based on the split department data. For example, if there is a department x (usually the chemical product department) that provides chemicals to the sewage treatment department, it is necessary to determine whether these chemicals are provided to the sewage treatment department or the remaining department w', or both, based on the split department data, so as to update the input-output data accordingly.

[0059] For the split sewage treatment sector and the remaining sector w', it is necessary to ensure that the sum of their input and output data is equal to the sum of the input and output data of the original sector w (water production and supply) to maintain the integrity and accuracy of the data.

[0060] After completing the data reorganization, we need to verify the first target input-output table to ensure that the splitting and reorganization process has not introduced errors. For example, the total output of the original department w (water production and supply department) is 100 billion yuan, of which the output of sewage treatment activities is 30 billion yuan. After the split, the output of the new sewage treatment department should be 30 billion yuan, while the output of the remaining department w' in the water production and supply department is 70 billion yuan.

[0061] During the data reorganization process, we need to ensure that the data of other departments (such as departments x, y, z, etc.) that have input-output relationships with department w are also split and adjusted accordingly. For example, if department x provides chemical drugs worth 20 billion yuan to department w, it is necessary to determine how much chemical drugs department x provides to the sewage treatment department (i.e., 6 billion yuan) and how much it provides to the remaining department w' (i.e., 14 billion yuan) based on the proportion of sewage treatment activities in department w (30%).

[0062] Finally, in the verification stage, it is necessary to check whether the sum of the outputs of the sewage treatment department and the remaining department w' in the first target input-output table is equal to the output of the original department w (water production and supply department) (100 billion yuan), and whether the input-output relationship of other departments, sewage treatment departments and remaining departments w' in the water production and supply department in the first target input-output table is consistent with the first input-output table.

[0063] Step S104: construct a second target input-output table for the second region according to the second input-output table and the first target input-output table.

[0064] Exemplarily, the second region may include multiple countries around the world, and the second input-output table of the second region may be obtained from economic reports on various industries published by some research teams.

[0065] The embodiment of the present application can adjust the second input-output table according to the constructed first target input-output table to subdivide the sewage treatment-related departments in the second input-output table to obtain the second target input-output table for the second area.

[0066] In an exemplary implementation, step S104 may include steps S401 to S403.

[0067] Step S401: Obtain the emission of characteristic factors corresponding to each department in the second input-output table, where the characteristic factors include air pollutants, water pollutants, soil pollutants, and greenhouse gases.

[0068] Step S402: Determine the environmental impact category corresponding to each department in the second input-output table according to the emission of the characteristic factor, and obtain an environmental impact list; the environmental impact category includes at least one of the following: global warming potential, human toxicity potential, freshwater ecotoxicity potential, marine ecotoxicity potential, terrestrial ecotoxicity potential, acidification potential, and eutrophication potential.

[0069] Step S403: construct a second target input-output table for the second area according to the environmental impact list and the first target input-output table.

[0070] For example, the embodiment of the present application can obtain the emissions of characteristic factors affecting the environment corresponding to each department from the second input-output table, such as the emissions of air pollutants, the emissions of water pollutants, the emissions of soil pollutants, the emissions of greenhouse gases, etc.

[0071] In an exemplary embodiment, the emission of the characteristic factor can be converted into the environmental impact category corresponding to each department in the second input-output table based on a preset environmental impact conversion formula to obtain an environmental impact list; the environmental impact category may include at least one of the following: global warming potential, human toxicity potential, freshwater ecotoxicity potential, marine ecotoxicity potential, terrestrial ecotoxicity potential, acidification potential, and eutrophication potential.

[0072] Among them, the environmental impact conversion formula is:

[0073] P b =E b ×CF b ;

[0074] P b Indicates the environmental impact category of pollutant / greenhouse gas b, E b represents the emission of pollutant / greenhouse gas b, CF b Characteristic factor representing the pollutant / greenhouse gas b.

[0075] The embodiment of the present application can integrate the environmental impact categories corresponding to each department in the first target input-output table and each department in the environmental impact list to obtain a second target input-output table that can accurately reflect the environmental impact caused by the progress of sewage treatment technology.

[0076] In an exemplary implementation, step S403 may include step S4031 and step S4032.

[0077] Step S4031: nest the first target input-output table as a subtable in the second input-output table to obtain a nested input-output table.

[0078] Step S4032: According to the environmental impact category in the environmental impact list, the department data corresponding to each department in the nested input-output table is adjusted to obtain a second target input-output table for the second region.

[0079] like Figure 3As shown, illustratively, the embodiment of the present application can nest the first target input-output table as a subtable in the second input-output table to obtain a nested input-output table including multiple regional subdivided sewage treatment departments. Then, the environmental impact category corresponding to each department in the environmental impact list is matched with the department in the nested input-output table to adjust the department data corresponding to each department in the nested input-output table to obtain the second target input-output table for the second region.

[0080] Specifically, the first target input-output table of the first region is a multi-regional input-output table of China including a subdivision of the sewage treatment department. The embodiment of the present application can construct the environmental impact list as an environmental satellite account and a nested input-output table together to obtain an environmentally extended global multi-regional input-output table of China including a multi-regional input-output table of the sewage treatment department.

[0081] Step S105: Evaluate the environmental impact of the second sewage treatment process according to the total factor productivity change rate and the second target input-output table.

[0082] The embodiment of the present application can evaluate the environmental impact corresponding to the second sewage treatment process based on the change rate of total factor productivity of the second sewage treatment process relative to the first sewage treatment process and the constructed second target input-output table, that is, the change in environmental impact caused by the second sewage treatment process relative to the first sewage treatment process.

[0083] In an exemplary implementation, step S105 may include step S501 and step S502.

[0084] Step S501: construct an equilibrium model according to the second target input-output table.

[0085] Step S502: Input the total factor productivity change rate into the equilibrium model for calculation to obtain the environmental impact assessment result corresponding to the second sewage treatment process.

[0086] Exemplarily, the embodiment of the present application can construct a balanced model according to the second target input-output table. Specifically, the balanced model can be composed of three matrices, for example, the matrix Ω CN , matrix Ω NN And the matrix Ω NF , the equilibrium model is as follows:

[0087]

[0088] Among them, the matrix Ω CN Determined according to the final demand matrix in the second target input-output table; Matrix Ω NN Determined according to the intermediate demand matrix in the second target input-output table; Matrix Ω NFIt is determined according to the employee remuneration vector and total output vector in the second target input-output table; O is a zero matrix.

[0089] The matrix Ω in the embodiment of the present application CN It reflects the direct consumption of consumers on products of various industries, and is calculated based on the final demand matrix in the second target input-output table; matrix Ω NN The economic connection between industries is described, that is, the situation where the products of one industry are used as production inputs of another industry. It is calculated based on the intermediate demand matrix in the second target input-output table; the matrix Ω NF Describes the degree of dependence of each industry on production factors, which is calculated based on the employee remuneration vector and total output vector in the second target input-output table; O is a zero matrix.

[0090] By inputting the total factor productivity change rate of the second sewage treatment process relative to the first sewage treatment process into the equilibrium model for analysis and calculation, the environmental impact assessment result corresponding to the second sewage treatment process can be obtained.

[0091] The specific analysis and calculation process is as follows:

[0092] The corresponding environmental impacts of the sewage treatment sector are:

[0093]

[0094] Among them, k is the sewage treatment department, e k is the environmental impact coefficient of the sewage treatment sector k, The output per unit of technological input.

[0095] For other sectors i, the sensitivity of their environmental impact to changes in wastewater treatment processes can be:

[0096]

[0097] Among them, P i is the environmental impact of sector i; A k is the technical efficiency of sewage treatment sector k; y i is the output of sector i; I i,k is an indicator function. If i=k, then I i,k =1, indicating that the improvement of sewage treatment technology has a direct impact on the environmental impact of sewage treatment department k; if i≠k, then I i,k =0, indicating that the improvement of sewage treatment technology has an indirect impact on other producers i in the sewage treatment sector k.

[0098] In order to quantify the changes in the environmental impact of each department caused by changes in sewage treatment productivity, the matrix M can be defined as:

[0099]

[0100] in, The matrix formed by diagonalizing the environmental impact vectors of each department under the first sewage treatment process; Reflects the elasticity of environmental impacts to productivity changes in the wastewater treatment sector.

[0101] The environmental impact change matrix Q of each department due to the change of total factor production rate TFP of sewage treatment process is:

[0102]

[0103] The matrix Q includes multiple elements, for example, ij is the element in the i-th row and j-th column of the matrix Q, which represents the change in the environmental impact of department i on department j due to the change in the total factor production rate TFP of the sewage treatment process; is the diagonalized matrix of △TFP. Except for the sewage treatment department, the △TFP of other departments is 0.

[0104] The change in environmental impact of sector i driven by the progress of wastewater treatment technology is as follows:

[0105]

[0106] Among them, q i represents the change in environmental impact of department i due to the progress of sewage treatment technology; q ij is the element in the i-th row and j-th column of the matrix Q; assuming that the second region includes a countries / regions, and there are b departments in the countries / regions other than China; there are m regions in China, and there are n departments in each region; (a-1)×b+m×n is the total number of departments in the second region, including b departments in the countries / regions other than China and n departments in the m regions in China.

[0107] Finally, the calculated total change h of the environmental impact of the entire industry chain driven by the improvement of sewage treatment technology is:

[0108]

[0109] The total change h is used to measure the change in environmental impact of the second sewage treatment process relative to the first sewage treatment process, that is, the evaluation result of the environmental impact corresponding to the second sewage treatment process.

[0110] The environmental impact assessment method of the sewage treatment process provided in the above embodiment includes: obtaining first sewage treatment data corresponding to the first sewage treatment process, second sewage treatment data corresponding to the second sewage treatment process, and a first input-output table of the first area and a second input-output table of the second area corresponding to the first sewage treatment process; the area range of the second area includes the area range of the first area; determining the total factor productivity change rate of the second sewage treatment process relative to the first sewage treatment process based on the first sewage treatment data and the second sewage treatment data; constructing a first target input-output table of the first area based on the first sewage treatment data and the first input-output table; constructing a second target input-output table of the second area based on the second input-output table and the first target input-output table; and evaluating the environmental impact corresponding to the second sewage treatment process based on the total factor productivity change rate and the second target input-output table. The embodiment of the present application obtains a first target input-output table that can reflect the impact of the sewage treatment process on the economic activities of each industry based on the first sewage treatment data and the first input-output table that reflects the relationship between the economic activities of each industry; then, based on the first target input-output table and the second input-output table, a second target input-output table that can reflect the impact of the sewage treatment process on the economic activities of each industry in a larger regional scope is obtained; then, by quantifying the total factor productivity change rate of the second sewage treatment process relative to the first sewage treatment process, and the second target input-output table, the environmental impact of the second sewage treatment process on the entire industrial chain relative to the first sewage treatment process can be evaluated.

[0111] See also Figure 4 , Figure 4 A schematic block diagram of the structure of a computer device provided in an embodiment of the present application. The computer device may be a server or a terminal device.

[0112] like Figure 4 As shown, the computer device includes a processor, a memory, and a network interface connected via a system bus, wherein the memory may include a storage medium and an internal memory.

[0113] The storage medium can store an operating system and a computer program. The computer program includes program instructions, and when the program instructions are executed, the processor can execute the steps of any method for environmental impact assessment of a sewage treatment process.

[0114] The processor is used to provide computing and control capabilities and support the operation of the entire computer equipment.

[0115] The internal memory provides an environment for the operation of the computer program in the storage medium. When the computer program is executed by the processor, the processor can execute the steps of any method for environmental impact assessment of a sewage treatment process.

[0116] The network interface is used for network communication, such as sending assigned tasks.

[0117] Those skilled in the art will understand that Figure 4 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0118] It should be understood that the processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0119] In one embodiment, the processor is used to execute a computer program and implement the following steps when executing the computer program:

[0120] Obtaining first sewage treatment data corresponding to the first sewage treatment process, second sewage treatment data corresponding to the second sewage treatment process, and a first input-output table of the first area and a second input-output table of the second area corresponding to the first sewage treatment process; the area range of the second area includes the area range of the first area;

[0121] Determining a total factor productivity change rate of the second sewage treatment process relative to the first sewage treatment process based on the first sewage treatment data and the second sewage treatment data;

[0122] Constructing a first target input-output table for the first region according to the first sewage treatment data and the first input-output table;

[0123] Constructing a second target input-output table for the second region according to the second input-output table and the first target input-output table;

[0124] According to the rate of change of total factor productivity and the second target input-output table, the environmental impact corresponding to the second sewage treatment process is evaluated.

[0125] In an exemplary embodiment, the first sewage treatment data and the second sewage treatment data both include at least one of the following: capital input, labor input, energy usage, chemical consumption, sewage treatment volume, comprehensive sewage treatment efficiency, pollutant emissions, and greenhouse gas emissions.

[0126] In an exemplary embodiment, the first input-output table includes department data related to sewage treatment, and a first target input-output table for the first region is constructed based on the first sewage treatment data and the first input-output table, including:

[0127] According to the first sewage treatment data, the department data related to sewage treatment in the first input-output table is split to obtain the first department data and the second department data; the first department data includes the data corresponding to the sewage treatment department, and the second department data includes the data corresponding to the departments other than the sewage treatment department;

[0128] The first department data and the second department data are reorganized to obtain the first target input-output table of the first region.

[0129] In an exemplary embodiment, constructing a second target input-output table for the second region according to the second input-output table and the first target input-output table includes:

[0130] Obtain the emission of characteristic factors corresponding to each department in the second input-output table. The characteristic factors include air pollutants, water pollutants, soil pollutants, and greenhouse gases.

[0131] According to the emission of characteristic factors, determine the environmental impact categories corresponding to each department in the second input-output table to obtain an environmental impact list; the environmental impact categories include at least one of the following: global warming potential, human toxicity potential, freshwater ecotoxicity potential, marine ecotoxicity potential, terrestrial ecotoxicity potential, acidification potential, and eutrophication potential;

[0132] Based on the environmental impact list and the first target input-output table, a second target input-output table for the second area is constructed.

[0133] In an exemplary embodiment, a second target input-output table for a second region is constructed according to the environmental impact list and the first target input-output table, including:

[0134] The first target input-output table is nested as a subtable in the second input-output table to obtain a nested input-output table;

[0135] According to the environmental impact categories in the environmental impact list, the department data corresponding to each department in the nested input-output table is adjusted to obtain the second target input-output table of the second region.

[0136] In an exemplary implementation, according to the emission of the characteristic factor, the environmental impact category corresponding to each department in the second input-output table is determined to obtain an environmental impact list, including:

[0137] Based on the preset environmental impact conversion formula, the emission of characteristic factors is converted into the environmental impact categories corresponding to each department in the second input-output table to obtain an environmental impact list;

[0138] Among them, the environmental impact conversion formula is:

[0139] P b =E b ×CF b ;

[0140] P b Indicates the environmental impact category of pollutant / greenhouse gas b, E b represents the emission of pollutant / greenhouse gas b, CF b Characteristic factor representing the pollutant / greenhouse gas b.

[0141] In an exemplary embodiment, evaluating the environmental impact of the second sewage treatment process according to the total factor productivity change rate and the second target input-output table includes:

[0142] According to the second objective input-output table, build an equilibrium model;

[0143] The total factor productivity change rate is input into the equilibrium model for calculation to obtain the environmental impact assessment result corresponding to the second sewage treatment process.

[0144] In an exemplary embodiment, the equilibrium model is:

[0145]

[0146] Among them, the matrix Ω CN Determined according to the final demand matrix in the second target input-output table; Matrix Ω NN Determined according to the intermediate demand matrix in the second target input-output table; Matrix Ω NF It is determined according to the employee remuneration vector and total output vector in the second target input-output table; O is a zero matrix.

[0147] It should be noted that technical personnel in the relevant field can clearly understand that, for the convenience and conciseness of description, the specific working process of the environmental impact assessment of the sewage treatment process described above can refer to the corresponding process in the embodiment of the environmental impact assessment method of the sewage treatment process mentioned above, and will not be repeated here.

[0148] An embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. The method implemented when the computer program is executed by a processor can refer to the various embodiments of the environmental impact assessment method for the sewage treatment process of the present application.

[0149] The computer-readable storage medium may be an internal storage unit of the computer device of the aforementioned embodiment, such as a hard disk or memory of the computer device. The computer-readable storage medium may also be an external storage device of the computer device, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the computer device.

[0150] It should be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0151] It should also be understood that the term "and / or" used in the specification of this application and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, including these combinations. It should be noted that, in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "including a..." does not exclude the presence of other identical elements in the process, method, article or system including the element.

[0152] The serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments. The above description is only a specific implementation mode of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for environmental impact assessment of a sewage treatment process, characterized in that: include: Obtaining first sewage treatment data corresponding to the first sewage treatment process, second sewage treatment data corresponding to the second sewage treatment process, and a first input-output table of the first area and a second input-output table of the second area corresponding to the first sewage treatment process; The area range of the second area includes the area range of the first area; Determining a total factor productivity change rate of the second sewage treatment process relative to the first sewage treatment process based on the first sewage treatment data and the second sewage treatment data; Constructing a first target input-output table for the first area according to the first sewage treatment data and the first input-output table; Constructing a second target input-output table for the second region according to the second input-output table and the first target input-output table; According to the total factor productivity change rate and the second target input-output table, the environmental impact corresponding to the second sewage treatment process is evaluated.

2. The environmental impact assessment method for a sewage treatment process according to claim 1, characterized in that: The first sewage treatment data and the second sewage treatment data both include at least one of the following: capital input, labor input, energy usage, chemical agent consumption, sewage treatment volume, comprehensive sewage treatment efficiency, pollutant emissions, and greenhouse gas emissions.

3. The environmental impact assessment method for a sewage treatment process according to claim 2, characterized in that: The first input-output table includes department data related to the sewage treatment process, and the first target input-output table of the first area is constructed according to the first sewage treatment data and the first input-output table, including: According to the first sewage treatment data, the department data related to the sewage treatment process in the first input-output table is split to obtain first department data and second department data; the first department data includes data corresponding to the sewage treatment department, and the second department data includes data corresponding to departments other than the sewage treatment department; The first department data and the second department data are reorganized to obtain a first target input-output table of the first area.

4. The environmental impact assessment method for a sewage treatment process according to claim 2, characterized in that: The constructing a second target input-output table for the second region according to the second input-output table and the first target input-output table includes: Obtaining the emission of characteristic factors corresponding to each department in the second input-output table, wherein the characteristic factors include air pollutants, water pollutants, soil pollutants, and greenhouse gases; According to the emission of the characteristic factor, determine the environmental impact category corresponding to each department in the second input-output table to obtain an environmental impact list; the environmental impact category includes at least one of the following: global warming potential, human toxicity potential, freshwater ecotoxicity potential, marine ecotoxicity potential, terrestrial ecotoxicity potential, acidification potential, and eutrophication potential; A second target input-output table for the second area is constructed based on the environmental impact list and the first target input-output table.

5. The environmental impact assessment method for a sewage treatment process according to claim 4, characterized in that: The step of constructing a second target input-output table for the second area according to the environmental impact list and the first target input-output table includes: Nesting the first target input-output table as a subtable in the second input-output table to obtain a nested input-output table; According to the environmental impact categories in the environmental impact list, the department data corresponding to each department in the nested input-output table is adjusted to obtain a second target input-output table for the second area.

6. The environmental impact assessment method for a sewage treatment process according to claim 4, characterized in that: According to the emission of the characteristic factor, the environmental impact category corresponding to each department in the second input-output table is determined to obtain an environmental impact list, including: Based on a preset environmental impact conversion formula, the emission of the characteristic factor is converted into the environmental impact category corresponding to each department in the second input-output table to obtain an environmental impact list; Wherein, the environmental impact conversion formula is: P b =And b ×CF b ; P b Indicates the environmental impact category of pollutant / greenhouse gas b, E b represents the emission of pollutant / greenhouse gas b, CF b Characteristic factor for pollutant / greenhouse gas b.

7. The method for environmental impact assessment of a sewage treatment process according to any one of claims 1 to 6, characterized in that: The step of evaluating the environmental impact of the second sewage treatment process according to the total factor productivity change rate and the second target input-output table includes: Constructing an equilibrium model according to the second objective input-output table; The total factor productivity change rate is input into the equilibrium model for calculation to obtain an assessment result of the environmental impact corresponding to the second sewage treatment process.

8. The method for environmental impact assessment of a sewage treatment process according to claim 7, characterized in that: The equilibrium model is: Among them, the matrix Ω CN Determined according to the final demand matrix in the second target input-output table; Matrix Ω NN Determined according to the intermediate demand matrix in the second target input-output table; Matrix Ω NF It is determined according to the employee remuneration vector and total output vector in the second target input-output table; O is a zero matrix.

9. A computer device, characterized in that: The computer device includes a memory and a processor; The memory is used to store computer programs; The processor is used to execute the computer program and implement the environmental impact assessment method for a sewage treatment process as described in any one of claims 1 to 8 when executing the computer program.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for environmental impact assessment of a sewage treatment process as claimed in any one of claims 1 to 8 are implemented.

Images