A method, system, terminal and storage medium for evaluating the life cycle carbon reduction benefits of recycled water for agricultural water-fertilizer integration

Abstract

The present invention discloses a method, system, terminal and storage medium for evaluating the life cycle carbon reduction benefits of recycled water for agricultural water-fertilizer integration. The method includes: constructing a data set of a municipal sewage regeneration treatment system; calculating the amount of recycled water to characterize the water resource recovery potential; calculating the potential for recovering crop nutrients from recycled water; and evaluating the full life cycle carbon reduction benefits of recycled water and fertilizer resources for irrigation using recycled water. The present invention integrates the water quantity and quality data of municipal sewage, the water consumption data of the regeneration process and the nitrogen and phosphorus treatment efficiency data, and the efficiency data of crop absorption of nitrogen and phosphorus nutrients in recycled water, and uses a material flow simulation method to estimate the amount of water and fertilizer resources recovered by recycled water irrigation and the amount of alternative traditional synthetic fertilizers, comprehensively simulates the water and fertilizer resource recovery potential of recycled water irrigation, and evaluates the carbon reduction benefits of recycled water irrigation, providing a key method and important basis for promoting the coordinated green and low-carbon development of water and agricultural systems.

Description

Technical Field

[0001] The present invention relates to the technical field of water resource data processing, and in particular to a method, system, terminal and computer-readable storage medium for evaluating the life cycle carbon reduction benefits of recycled water used in agricultural water-fertilizer integration. Background Art

[0002] How to deal with water shortage has become an important global issue. As an unconventional water source, urban sewage has stable water quantity and quality and contains a large amount of nitrogen and phosphorus resources. Its development and utilization has received widespread attention. Regenerating urban sewage for agricultural irrigation can, on the one hand, alleviate the problem of water shortage in agricultural production and development, and on the other hand, achieve the simultaneous recycling of nitrogen and phosphorus resources, reduce the production and use of traditional synthetic fertilizers and their impact, and promote the coordinated green and low-carbon development of water and agricultural systems. Therefore, the water and fertilizer resource recovery potential of recycled water irrigation has become an important factor in comprehensively evaluating the potential of recycled water irrigation and promoting the green and low-carbon development of sewage recycling and utilization.

[0003] When evaluating the water and fertilizer resource recovery benefits of recycled water irrigation, the existing technology mostly ignores the impact of the sewage regeneration treatment process itself on the amount of water resource recovery. However, pipeline leakage, the need for additional fresh water, etc. will cause changes in the amount of recycled water. Therefore, it is difficult for existing assessments to fully reflect the water resource recovery potential of recycled water. As for the nitrogen and phosphorus resource recovery potential, it is generally estimated based on the water volume and the nitrogen and phosphorus concentrations in the recycled water. The nitrogen and phosphorus concentrations are obtained by on-site testing or experimental analysis, but most of these methods ignore the impact of the regeneration process. There are also methods that use material flow simulation, that is, based on the sewage water volume and nitrogen and phosphorus content entering the sewage regeneration treatment process system, combined with the operating efficiency of different regeneration treatment processes, the nitrogen and phosphorus content in the recycled water is estimated, but the existing work has not further considered the amount of traditional synthetic fertilizers that can be replaced, and thus cannot evaluate the resource and environmental benefits of recycled water irrigation replacing the use of traditional synthetic fertilizers.

[0004] At present, the water and fertilizer resource recovery potential of recycled water irrigation cannot be systematically and comprehensively evaluated, which will hinder the smooth implementation of its carbon reduction benefit evaluation work and is not conducive to the green and low-carbon development of water and agricultural systems. Therefore, it is urgent to establish a systematic and comprehensive scientific and technological method to evaluate the full life cycle carbon reduction benefits of water and fertilizer resource recovery in the process of recycled water irrigation, and provide key methods and data support for the construction of efficient and low-carbon recycled water irrigation utilization strategies.

[0005] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0006] The main purpose of the present invention is to provide a method, system, terminal and computer-readable storage medium for evaluating the life cycle carbon reduction benefits of recycled water for agricultural water-fertilizer integration, aiming to solve the problem that the water and fertilizer resource recovery potential of recycled water irrigation in the prior art cannot be systematically and comprehensively evaluated, which will hinder the smooth implementation of its carbon reduction benefit evaluation work and is not conducive to the green and low-carbon development of water and agricultural systems.

[0007] To achieve the above object, the present invention provides a method for evaluating the carbon reduction benefits of recycled water in the life cycle of agricultural water-fertilizer integration, and the method for evaluating the carbon reduction benefits of recycled water in the life cycle of agricultural water-fertilizer integration comprises the following steps:

[0008] Constructing a data set of an urban sewage regeneration treatment system, wherein the data set includes urban sewage volume data, urban sewage total nitrogen and total phosphorus concentration data, and sewage regeneration treatment system efficiency data, wherein the sewage regeneration treatment system efficiency data includes regeneration treatment process type, water resource loss rate data of the regeneration treatment process, and total nitrogen and total phosphorus removal rate data;

[0009] Calculate the amount of recycled water based on the urban sewage volume data and the water resource loss rate data of the recycling treatment process to characterize the water resource recovery potential;

[0010] According to the total nitrogen and total phosphorus concentration data of the urban sewage, the type of regeneration treatment process, the total nitrogen and total phosphorus removal rate data, and the amount of regenerated water, the total nitrogen and total phosphorus content in the regenerated water is calculated, and the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in the regenerated water and the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in traditional synthetic fertilizers are constructed. According to the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in the regenerated water and the total nitrogen and total phosphorus content in the regenerated water, the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in the regenerated water is calculated. According to the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in the regenerated water and the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in traditional synthetic fertilizers, the amount of traditional synthetic fertilizers that can be replaced by nitrogen and phosphorus nutrition resources in the regenerated water is calculated;

[0011] Based on the amount of recycled water and the amount of traditional synthetic fertilizers that can be replaced by the nitrogen and phosphorus nutrient resources in the recycled water, the full life cycle carbon reduction benefits of recycled water and fertilizer resources used in recycled water irrigation are evaluated.

[0012] In addition, to achieve the above-mentioned purpose, the present invention also provides a life cycle carbon reduction benefit evaluation system for recycled water used in agricultural water-fertilizer integration, wherein the life cycle carbon reduction benefit evaluation system for recycled water used in agricultural water-fertilizer integration includes:

[0013] A data set construction module is used to construct a data set of an urban sewage regeneration treatment system, wherein the data set of the urban sewage regeneration treatment system includes urban sewage water volume data, urban sewage total nitrogen and total phosphorus concentration data, and sewage regeneration treatment system efficiency data, wherein the sewage regeneration treatment system efficiency data includes regeneration treatment process type, water resource loss rate data of the regeneration treatment process, and total nitrogen and total phosphorus removal rate data;

[0014] A recycling potential calculation module, used to calculate the amount of recycled water based on the urban sewage volume data and the water resource loss rate data of the recycling treatment process to characterize the water resource recycling potential;

[0015] A traditional synthetic fertilizer dosage calculation module is used to calculate the total nitrogen and total phosphorus content in the reclaimed water according to the total nitrogen and total phosphorus concentration data of the urban sewage, the type of the regeneration treatment process, the total nitrogen and total phosphorus removal rate data, and the amount of reclaimed water, to construct efficiency data of crops absorbing nitrogen and phosphorus nutrition in the reclaimed water and efficiency data of crops absorbing nitrogen and phosphorus nutrition in traditional synthetic fertilizers, to calculate the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in the reclaimed water according to the efficiency data of crops absorbing nitrogen and phosphorus nutrition in the reclaimed water and the total nitrogen and total phosphorus content in the reclaimed water, and to calculate the amount of traditional synthetic fertilizers that can replace nitrogen and phosphorus nutrition resources in the reclaimed water according to the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in the reclaimed water and the efficiency data of crops absorbing nitrogen and phosphorus nutrition in traditional synthetic fertilizers;

[0016] The carbon reduction benefit evaluation module is used to evaluate the carbon reduction benefits of recycled water and fertilizer resources over the entire life cycle of recycled water irrigation based on the amount of recycled water and the amount of traditional synthetic fertilizers that can be replaced by the nitrogen and phosphorus nutrient resources in the recycled water.

[0017] In addition, to achieve the above-mentioned purpose, the present invention also provides a terminal, wherein the terminal includes: a memory, a processor, and a life cycle carbon reduction benefit assessment program for recycled water used for agricultural water-fertilizer integration, which is stored on the memory and can be run on the processor, and when the life cycle carbon reduction benefit assessment program for recycled water used for agricultural water-fertilizer integration is executed by the processor, the steps of the life cycle carbon reduction benefit assessment method for recycled water used for agricultural water-fertilizer integration as described above are implemented.

[0018] In addition, to achieve the above-mentioned purpose, the present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a life cycle carbon reduction benefit assessment program for recycled water used for agricultural water-fertilizer integration, and when the life cycle carbon reduction benefit assessment program for recycled water used for agricultural water-fertilizer integration is executed by a processor, it implements the steps of the life cycle carbon reduction benefit assessment method for recycled water used for agricultural water-fertilizer integration as described above.

[0019] In the present invention, a data set of a municipal sewage regeneration treatment system is constructed, wherein the data set of the municipal sewage regeneration treatment system includes data of municipal sewage water volume, data of total nitrogen and total phosphorus concentrations in municipal sewage, and efficiency data of the sewage regeneration treatment system, wherein the efficiency data of the sewage regeneration treatment system includes data of the type of regeneration treatment process, data of water resource loss rate in the regeneration treatment process, and data of total nitrogen and total phosphorus removal rates; based on the data of the municipal sewage water volume and data of water resource loss rate in the regeneration treatment process, the amount of regenerated water is calculated to characterize the water resource recovery potential; based on the data of total nitrogen and total phosphorus concentrations in municipal sewage, the type of regeneration treatment process, the data of total nitrogen and total phosphorus removal rates, and the amount of regenerated water, the amount of regenerated water is calculated to characterize the water resource recovery potential. The total nitrogen and total phosphorus content in raw water is used to construct the efficiency data of crops absorbing nitrogen and phosphorus nutrition in recycled water and the efficiency data of crops absorbing nitrogen and phosphorus nutrition in traditional synthetic fertilizers. According to the efficiency data of crops absorbing nitrogen and phosphorus nutrition in recycled water and the total nitrogen and total phosphorus content in the recycled water, the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in recycled water is calculated. According to the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in recycled water and the efficiency data of crops absorbing nitrogen and phosphorus nutrition in traditional synthetic fertilizers, the amount of traditional synthetic fertilizers that can be replaced by nitrogen and phosphorus nutrition resources in recycled water is calculated; according to the amount of recycled water and the amount of traditional synthetic fertilizers that can be replaced by nitrogen and phosphorus nutrition resources in recycled water, the carbon reduction benefits of recycled water irrigation and fertilizer resources throughout the life cycle are evaluated. The present invention comprehensively simulates the water and fertilizer resource recovery potential of recycled water irrigation, and then scientifically evaluates the carbon reduction benefits of recycled water irrigation, providing a key method and important basis for promoting the coordinated green and low-carbon development of water and agricultural systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a flow chart of a preferred embodiment of the method for evaluating the life cycle carbon reduction benefits of agricultural water-fertilizer integration using recycled water of the present invention;

[0021] Figure 2 This is a structural diagram of a preferred embodiment of the life cycle carbon reduction benefit evaluation system for agricultural water-fertilizer integration using recycled water of the present invention;

[0022] Figure 3 It is a structural diagram of a preferred embodiment of the terminal of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] Aiming at the carbon reduction benefit evaluation of recycled water and fertilizer resources for irrigation, the present invention provides a carbon reduction benefit evaluation method based on a life cycle perspective, covering the entire process from sewage entering the regeneration treatment system to crops absorbing nitrogen and phosphorus nutrients in the recycled water. The method integrates urban sewage water quantity and quality data, water consumption data of the regeneration process and nitrogen and phosphorus treatment efficiency data, as well as efficiency data of crops absorbing nitrogen and phosphorus nutrients in the recycled water, and uses a material flow simulation method to estimate the amount of water and fertilizer resources recovered by recycled water irrigation and the amount of alternative traditional synthetic fertilizers to evaluate its carbon reduction benefits throughout its life cycle. Based on a systematic and comprehensive simulation perspective, the present invention proposes a method framework with data-driven as the core, and establishes concise and clear technical steps, which can comprehensively simulate the water and fertilizer resource recovery potential of recycled water irrigation, and then scientifically evaluate the carbon reduction benefits of recycled water irrigation, providing a key method and important basis for promoting the coordinated green and low-carbon development of water and agricultural systems.

[0025] The method for evaluating the carbon reduction benefits of the life cycle of agricultural water-fertilizer integration using recycled water as described in the preferred embodiment of the present invention is as follows: Figure 1 As shown, the life cycle carbon reduction benefit assessment method for the use of recycled water in agricultural water-fertilizer integration includes the following steps:

[0026] Step S10, constructing a data set for an urban sewage regeneration treatment system, wherein the data set includes urban sewage volume data, urban sewage total nitrogen and total phosphorus concentration data, and sewage regeneration treatment system efficiency data, wherein the sewage regeneration treatment system efficiency data includes regeneration treatment process type, water resource loss rate data of the regeneration treatment process, and total nitrogen and total phosphorus removal rate data.

[0027] Among them, the urban sewage regeneration treatment system data set includes urban sewage water quantity and quality data and sewage regeneration treatment system efficiency data. The urban sewage water quantity and quality data include urban sewage water quantity data, urban sewage total nitrogen and total phosphorus concentration data. The sewage regeneration treatment system efficiency data includes regeneration treatment process type, water resource loss rate data of the regeneration treatment process, and total nitrogen and total phosphorus removal rate data.

[0028] Specifically, the step S10 includes:

[0029] Step S101: Based on on-site monitoring or an open data platform, collect urban sewage water volume and water quality data, the urban sewage water volume and water quality data includes urban sewage water volume data , Total nitrogen concentration data of urban sewage and total phosphorus concentration data of urban sewage The relevant data can be monitored on-site, or the water plant operation report, public monitoring data platform, special reports and scientific and technological literature can be investigated.

[0030] Step S102: For a regeneration process , collection and recycling process Data on water loss rate in process (i.e., the amount of water resources consumed by treating a unit of water volume); relevant data can be obtained through on-site monitoring, or by investigating water plant operation reports or scientific literature; if there are multiple water resource loss rate data, the Monte Carlo method is used to calculate the probability distribution of the average value as the water resource loss rate data , that is, for a regeneration process If multiple reports or documents can provide water consumption data for the process, the Monte Carlo method is used to find the probability distribution of the average value as the corresponding .

[0031] Step S103: Regeneration process , collection and recycling process Total nitrogen removal data and total phosphorus removal data ; Common data sources include water plant operation reports, public monitoring data platforms, special reports and scientific literature; If there are multiple total nitrogen removal rate data and total phosphorus removal rate data, the Monte Carlo method is used to calculate the probability distribution of the average value as the total nitrogen removal rate data and total phosphorus removal data , that is, for a regeneration process If multiple reports or literature can provide total nitrogen and total phosphorus removal rate data, the Monte Carlo method is used to calculate the probability distribution of their average values ​​as the corresponding and .

[0032] Step S104, the collected urban sewage water quantity and quality data, water resource loss rate data (process water consumption data), total nitrogen removal rate data and total phosphorus removal rate data are stored and organized according to a preset format; usually, the collected data can be stored and organized in a csv or xlsx spreadsheet file format, and the regeneration process name, data original unit, probability distribution type and data source and other information should be recorded at the same time.

[0033] Step S20: Calculate the amount of recycled water based on the urban sewage volume data and the water resource loss rate data of the regeneration treatment process to characterize the water resource recovery potential.

[0034] Specifically, according to the urban sewage volume data Water resource loss rate data for the regeneration process , Calculate the amount of recycled water based on the Monte Carlo method , to characterize the water recovery potential of wastewater reclamation treatment systems:

[0035] .

[0036] Step S30, according to the total nitrogen and total phosphorus concentration data of the urban sewage, the type of regeneration treatment process, the total nitrogen and total phosphorus removal rate data, and the amount of regenerated water, calculate the total nitrogen and total phosphorus content in the regenerated water, construct efficiency data of nitrogen and phosphorus nutrition absorbed by crops in the regenerated water and efficiency data of nitrogen and phosphorus nutrition absorbed by crops in traditional synthetic fertilizers, calculate the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in the regenerated water according to the efficiency data of nitrogen and phosphorus nutrition absorbed by crops in the regenerated water and the total nitrogen and total phosphorus content in the regenerated water, calculate the amount of traditional synthetic fertilizers that can be replaced by nitrogen and phosphorus nutrition resources in the regenerated water according to the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in the regenerated water and the efficiency data of nitrogen and phosphorus nutrition absorbed by crops in traditional synthetic fertilizers.

[0037] Specifically, the step S30 includes:

[0038] Step S301: According to the total nitrogen concentration data of urban sewage , Total phosphorus concentration data of urban sewage , regeneration process type, total nitrogen removal rate data , total phosphorus removal rate data and recycled water volume , calculate the total nitrogen content in recycled water and total phosphorus content :

[0039] ;

[0040] .

[0041] Step S302: Collecting data on the efficiency of crops absorbing nitrogen and phosphorus nutrients in recycled water, including data on the amount of nitrogen per unit mass in recycled water that can be absorbed and utilized by crops and data on the amount of phosphorus per unit mass in recycled water that can be absorbed and utilized by crops ; Common data sources are field test reports or scientific literature; If there are multiple data on the amount of nitrogen per unit mass in recycled water that can be absorbed and utilized by crops and multiple data on the amount of phosphorus per unit mass in recycled water that can be absorbed and utilized by crops, the Monte Carlo method is used to calculate the probability distribution of the average value as the corresponding and .

[0042] Step S303: Collecting the efficiency data of crop absorption of nitrogen and phosphorus nutrients in traditional synthetic fertilizers, including the data on the nitrogen per unit mass in traditional synthetic fertilizers that can be absorbed and utilized by crops. Data on the amount of phosphorus per unit mass in traditional synthetic fertilizers that can be absorbed and utilized by crops ; Common data sources are field test reports or scientific literature; If there are multiple data on the amount of nitrogen per unit mass in traditional synthetic fertilizers that can be absorbed and utilized by crops and multiple data on the amount of phosphorus per unit mass in traditional synthetic fertilizers that can be absorbed and utilized by crops, the Monte Carlo method is used to calculate the probability distribution of the average value as the corresponding and .

[0043] Step S304: According to the total nitrogen content in the reclaimed water and total phosphorus content , and data on the nitrogen per unit mass in recycled water that can be absorbed and utilized by crops and data on the amount of phosphorus per unit mass in recycled water that can be absorbed and utilized by crops Calculation of nitrogen nutrient quality in recycled water that can be absorbed by crops based on Monte Carlo method and phosphorus nutritional quality :

[0044] ;

[0045] .

[0046] Step S305: Based on the nitrogen nutrient quality that can be absorbed by crops in the recycled water and phosphorus nutritional quality , and data on the amount of nitrogen per unit mass in traditional synthetic fertilizers that can be absorbed and utilized by crops Data on the amount of phosphorus per unit mass in traditional synthetic fertilizers that can be absorbed and utilized by crops Calculate the amount of traditional synthetic fertilizers that can be replaced by nitrogen nutrient resources in recycled water based on the Monte Carlo method The amount of traditional synthetic fertilizers that can be replaced by phosphorus nutrients in recycled water :

[0047] ;

[0048] ;

[0049] in, and They respectively represent the mass proportion of the effective ingredients of nitrogen and phosphorus nutrients in a specific traditional synthetic fertilizer, generally based on the mass proportion of the elements in the fertilizer chemical formula.

[0050] Step S40: Evaluate the carbon reduction benefits of recycled water irrigation using recycled water and fertilizer resources over the entire life cycle based on the amount of recycled water and the amount of traditional synthetic fertilizers that can be replaced by the nitrogen and phosphorus nutrient resources in the recycled water.

[0051] Among them, the full life cycle carbon reduction benefits of recycled water and fertilizer resources used in recycled water irrigation include the carbon reduction benefits of recycled water resources used in recycled water irrigation and the carbon reduction benefits of recycled nitrogen and phosphorus resources used in recycled water irrigation.

[0052] Specifically, the step S40 includes:

[0053] Step S401: For a specific traditional irrigation water resource development process, collect the energy resource consumption and pollutant environmental emission data in the unit water production process of the specific traditional irrigation water resource development process, and compile a first life cycle data list; the relevant data mostly comes from background databases dedicated to life cycle assessment, such as the Ecoinvent database, and can also be supplemented by investigating scientific and technological literature.

[0054] Step S402: Based on the amount of recycled water, select a life cycle assessment model according to specific cases, such as ReCiPe, Eco-Indicator and Impact 2002+, to evaluate life cycle carbon emissions to characterize the carbon reduction benefits of recycled water resources in recycled water irrigation; the calculation and evaluation work can be carried out with the help of professional life cycle assessment software platforms, and the mainstream software platforms are Simapro and GaBi.

[0055] Step S403: for a specific traditional synthetic fertilizer, collect the energy resource consumption and pollutant environmental emission data of the specific traditional synthetic fertilizer per unit mass during the fertilizer production process, and compile a second life cycle data list; the relevant data are mostly derived from background databases dedicated to life cycle assessment, such as the Ecoinvent database, and can also be supplemented by researching scientific literature.

[0056] Step S404: Combined with the second life cycle data list, based on the amount of traditional synthetic fertilizers that can be replaced by nitrogen and phosphorus nutrient resources in recycled water, select a life cycle assessment model according to specific cases, such as ReCiPe, Eco-Indicator and Impact 2002+, to evaluate life cycle carbon emissions to characterize the carbon reduction benefits of recycled nitrogen and phosphorus resources in recycled water irrigation; the calculation and evaluation work can be carried out with the help of professional life cycle assessment software platforms, and the mainstream software platforms are Simapro and GaBi.

[0057] Compared with the prior art, the present invention has the following key differences and advantages:

[0058] (1) For the evaluation of the water and fertilizer resource recovery potential of recycled water irrigation, the present invention fully considers the difficulties of evaluation based on experimental methods and proposes an evaluation method with data-driven as the core. By integrating multivariate data and comprehensively applying a variety of technical methods, as well as a Monte Carlo-based calculation method, the water and fertilizer resource recovery potential of recycled water irrigation can be systematically and comprehensively evaluated. Compared with traditional experimental methods, it can greatly reduce the input of manpower and material resources and greatly improve work efficiency.

[0059] (2) In order to address the problem that the assessment of the water resource recovery potential of sewage regeneration is not comprehensive enough, the assessment method constructed by the present invention takes into account the water resource consumption of the sewage regeneration treatment process itself, and reflects the water resource recovery potential of sewage regeneration in a more systematic and comprehensive manner, providing technical support for scientifically evaluating its role in alleviating water resource shortages and objectively recognizing the importance of sewage regeneration.

[0060] (3) In order to address the problem that the potential for nitrogen and phosphorus resource recovery from recycled water irrigation is not systematic enough, the evaluation method proposed in this invention further expands the scope of evaluation to the end-point crop absorption and utilization process. By coupling multi-source data, the difference in nitrogen and phosphorus nutrients absorbed by crops from recycled water and traditional synthetic fertilizers is quantified, and the amount of traditional synthetic fertilizers that can be replaced by nitrogen and phosphorus resources in recycled water is calculated. This method more systematically, comprehensively, clearly and intuitively depicts the potential for nitrogen and phosphorus resource recovery from recycled water irrigation, providing a data and methodological basis for further evaluating its carbon reduction benefits.

[0061] (4) The present invention adopts an impact assessment method based on a life cycle perspective, scientifically quantifies the carbon reduction benefits of recycled water and fertilizer resources in the use of recycled water for irrigation, can provide more intuitive and comprehensive assessment results, and is conducive to the interpretation and analysis of the assessment results, thereby providing a scientific basis for building a green and low-carbon strategy for the use of recycled water for irrigation, and providing a scientific reference for promoting the coordinated and sustainable development of water and agricultural systems.

[0062] (5) The evaluation method framework constructed by the present invention has modular characteristics, and the data set it calls is updatable. With the development of environmental monitoring and chemical analysis technology, the data set related to crop absorption efficiency can be further updated and expanded to improve the representativeness and accuracy of the evaluation method.

[0063] For sewage regeneration and irrigation utilization, the core of the present invention is to construct a material flow simulation method for the whole process of water and nitrogen and phosphorus resources from sewage regeneration treatment to crop absorption and utilization, and propose a water resource recovery potential assessment method covering the water resource consumption of the sewage regeneration treatment process itself. Based on the difference in the absorption efficiency of nitrogen and phosphorus nutrients in recycled water and traditional synthetic fertilizers by crops, a technical method for calculating the amount of traditional synthetic fertilizers that can be replaced by recycled water irrigation utilization is established, and then coupled with the life cycle assessment method to achieve the carbon reduction benefit assessment of recycled water and fertilizer resources for recycled water irrigation utilization. Among them, for the quantification of the difference in the absorption efficiency of nitrogen and phosphorus nutrients in recycled water and traditional synthetic fertilizers by crops, the coupled mechanism model can also be considered for simulation; the mechanism model generally describes the relevant process through a large number of complex mathematical expressions, which has high interpretability, but also increases the difficulty of modeling and the length of calculation time, and needs to be comprehensively considered and selected according to the actual situation. Regarding the evaluation of carbon reduction benefits, the methods generally used to calculate carbon emissions include emission factor method, actual measurement method and mass balance method. The present invention adopts an emission factor accounting method based on a life cycle perspective. In comparison, the method flow is simpler and more operational, but it is necessary to pay attention to selecting appropriate emission factors according to specific case circumstances.

[0064] Furthermore, if Figure 2 As shown, based on the above-mentioned life cycle carbon reduction benefit assessment method for recycled water used in agricultural water-fertilizer integration, the present invention also provides a life cycle carbon reduction benefit assessment system for recycled water used in agricultural water-fertilizer integration, wherein the life cycle carbon reduction benefit assessment system for recycled water used in agricultural water-fertilizer integration includes:

[0065] The data set construction module 51 is used to construct a data set of a municipal sewage regeneration treatment system, wherein the data set of the municipal sewage regeneration treatment system includes the municipal sewage water volume data, the municipal sewage total nitrogen and total phosphorus concentration data, and the efficiency data of the sewage regeneration treatment system, wherein the efficiency data of the sewage regeneration treatment system includes the regeneration treatment process type, the water resource loss rate data of the regeneration treatment process, and the total nitrogen and total phosphorus removal rate data;

[0066] A recycling potential calculation module 52 is used to calculate the amount of recycled water based on the urban sewage water volume data and the water resource loss rate data of the recycling process to characterize the water resource recycling potential;

[0067] The traditional synthetic fertilizer dosage calculation module 53 is used to calculate the total nitrogen and total phosphorus content in the reclaimed water according to the total nitrogen and total phosphorus concentration data of the urban sewage, the type of the regeneration treatment process, the total nitrogen and total phosphorus removal rate data, and the amount of the reclaimed water, to construct the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in the reclaimed water and the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in the traditional synthetic fertilizers, to calculate the nitrogen and phosphorus nutrition quality that can be absorbed by the crops in the reclaimed water according to the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in the reclaimed water and the total nitrogen and total phosphorus content in the reclaimed water, and to calculate the dosage of the traditional synthetic fertilizer that can replace the nitrogen and phosphorus nutrition resources in the reclaimed water according to the nitrogen and phosphorus nutrition quality that can be absorbed by the crops in the reclaimed water and the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in the traditional synthetic fertilizers;

[0068] The carbon reduction benefit evaluation module 54 is used to evaluate the carbon reduction benefits of recycled water and fertilizer resources over the entire life cycle of recycled water irrigation based on the amount of recycled water and the amount of traditional synthetic fertilizers that can be replaced by the nitrogen and phosphorus nutrient resources in the recycled water.

[0069] Furthermore, if Figure 3 As shown, based on the above-mentioned method and system for evaluating the life cycle carbon reduction benefits of recycled water for agricultural water-fertilizer integration, the present invention also provides a terminal accordingly, which includes a processor 10, a memory 20 and a display 30. Figure 3 Only some components of the terminal are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0070] In some embodiments, the memory 20 may be an internal storage unit of the terminal, such as a hard disk or memory of the terminal. In other embodiments, the memory 20 may also be an external storage device of the terminal, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the terminal. Further, the memory 20 may also include both an internal storage unit of the terminal and an external storage device. The memory 20 is used to store application software and various types of data installed on the terminal, such as the program code of the installation terminal. The memory 20 may also be used to temporarily store data that has been output or is to be output. In one embodiment, a life cycle carbon reduction benefit assessment program 40 for agricultural water-fertilizer integration of recycled water is stored on the memory 20, and the life cycle carbon reduction benefit assessment program 40 for agricultural water-fertilizer integration of recycled water can be executed by the processor 10, thereby realizing the life cycle carbon reduction benefit assessment method for agricultural water-fertilizer integration of recycled water in this application.

[0071] In some embodiments, the processor 10 may be a central processing unit (CPU), a microprocessor or other data processing chip, used to run the program code or process data stored in the memory 20, such as executing the life cycle carbon reduction benefit assessment method for the use of recycled water in agricultural water-fertilizer integration.

[0072] In some embodiments, the display 30 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 30 is used to display information on the terminal and to display a visual user interface. The processor 10, the memory 20, and the display 30 of the terminal communicate with each other via a system bus.

[0073] In one embodiment, when the processor 10 executes the life cycle carbon reduction benefit assessment program 40 for the use of recycled water for agricultural water-fertilizer integration in the memory 20, the steps of the life cycle carbon reduction benefit assessment method for the use of recycled water for agricultural water-fertilizer integration as described above are implemented.

[0074] The present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a life cycle carbon reduction benefit assessment program for the use of recycled water for agricultural water-fertilizer integration, and when the life cycle carbon reduction benefit assessment program for the use of recycled water for agricultural water-fertilizer integration is executed by a processor, the steps of the life cycle carbon reduction benefit assessment method for the use of recycled water for agricultural water-fertilizer integration as described above are implemented.

[0075] In summary, the present invention provides a method, system, terminal and computer-readable storage medium for evaluating the life cycle carbon reduction benefits of recycled water for agricultural water-fertilizer integration. The method comprises: constructing a data set of an urban sewage regeneration treatment system, wherein the data set of the urban sewage regeneration treatment system comprises urban sewage water volume data, urban sewage total nitrogen and total phosphorus concentration data, and sewage regeneration treatment system efficiency data, wherein the sewage regeneration treatment system efficiency data comprises regeneration treatment process type, water resource loss rate data of the regeneration treatment process, and total nitrogen and total phosphorus removal rate data; calculating the recycled water volume according to the urban sewage water volume data and the water resource loss rate data of the regeneration treatment process to characterize the water resource recovery potential; calculating the recycled water volume according to the urban sewage water volume data and the water resource loss rate data of the regeneration treatment process to characterize the water resource recovery potential; calculating the recycled water volume according to the urban sewage total nitrogen and total phosphorus concentration data, the regeneration treatment process type, the water resource loss rate data of the regeneration treatment process, and the total nitrogen and total phosphorus removal rate data. The total nitrogen and total phosphorus removal rate data, as well as the amount of recycled water, are used to calculate the total nitrogen and total phosphorus content in the recycled water, construct the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in the recycled water and the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in traditional synthetic fertilizers, calculate the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in the recycled water according to the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in the recycled water and the total nitrogen and total phosphorus content in the recycled water, calculate the amount of traditional synthetic fertilizers that can be replaced by nitrogen and phosphorus nutrition resources in the recycled water according to the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in the recycled water and the efficiency data of nitrogen and phosphorus nutrition in traditional synthetic fertilizers by the crops; evaluate the carbon reduction benefits of recycled water irrigation and fertilizer resources throughout the life cycle according to the amount of recycled water and the amount of traditional synthetic fertilizers that can be replaced by nitrogen and phosphorus nutrition resources in the recycled water. The present invention comprehensively simulates the water and fertilizer resource recovery potential of recycled water irrigation, and then scientifically evaluates the carbon reduction benefits of recycled water irrigation, providing a key method and important basis for promoting the coordinated green and low-carbon development of water and agricultural systems.

[0076] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal 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 terminal. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or terminal including the element.

[0077] Of course, those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing related hardware (such as a processor, a controller, etc.) through a computer program, and the program can be stored in a computer-readable storage medium that can be read by a computer, and the program can include the processes of the above-mentioned method embodiments when executed. The computer-readable storage medium can be a memory, a disk, an optical disk, etc.

[0078] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A method for evaluating the carbon reduction benefits of recycled water in agricultural water-fertilizer integration during its life cycle, characterized in that: The life cycle carbon reduction benefit assessment method for recycled water used in agricultural water-fertilizer integration includes: Constructing a data set of an urban sewage regeneration treatment system, wherein the data set includes urban sewage volume data, urban sewage total nitrogen and total phosphorus concentration data, and sewage regeneration treatment system efficiency data, wherein the sewage regeneration treatment system efficiency data includes regeneration treatment process type, water resource loss rate data of the regeneration treatment process, and total nitrogen and total phosphorus removal rate data; Calculate the amount of recycled water based on the urban sewage volume data and the water resource loss rate data of the recycling treatment process to characterize the water resource recovery potential; According to the total nitrogen and total phosphorus concentration data of the urban sewage, the type of regeneration treatment process, the total nitrogen and total phosphorus removal rate data, and the amount of regenerated water, the total nitrogen and total phosphorus content in the regenerated water is calculated, and the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in the regenerated water and the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in traditional synthetic fertilizers are constructed. According to the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in the regenerated water and the total nitrogen and total phosphorus content in the regenerated water, the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in the regenerated water is calculated. According to the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in the regenerated water and the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in traditional synthetic fertilizers, the amount of traditional synthetic fertilizers that can be replaced by nitrogen and phosphorus nutrition resources in the regenerated water is calculated; Based on the amount of recycled water and the amount of traditional synthetic fertilizers that can be replaced by the nitrogen and phosphorus nutrient resources in the recycled water, evaluate the carbon reduction benefits of recycled water and fertilizer resources over the entire life cycle of recycled water irrigation; The urban sewage reclamation treatment system data set includes urban sewage water quantity and quality data and sewage reclamation treatment system efficiency data; The construction of the urban sewage reclamation treatment system data set specifically includes: Based on on-site monitoring or public data platforms, collect urban sewage water volume and quality data, the urban sewage water volume and quality data includes urban sewage water volume data , Total nitrogen concentration data of urban sewage and total phosphorus concentration data of urban sewage ; For a regeneration process , collection and recycling process Data on water loss rate in process If there are multiple water resource loss rate data, the Monte Carlo method is used to find the probability distribution of the average value as the water resource loss rate data. ; For the regeneration process , collection and recycling process Total nitrogen removal data and total phosphorus removal data If there are multiple total nitrogen removal rate data and total phosphorus removal rate data, the Monte Carlo method is used to calculate the probability distribution of the average value as the total nitrogen removal rate data. and total phosphorus removal data ; The collected urban sewage water volume and quality data, water resource loss rate data, total nitrogen removal rate data and total phosphorus removal rate data are stored and sorted according to a preset format; The method of calculating the amount of recycled water based on the urban sewage volume data and the water resource loss rate data of the recycling process to characterize the water resource recovery potential specifically includes: According to the urban sewage water volume data Water resource loss rate data for the regeneration process , Calculate the amount of recycled water based on the Monte Carlo method , to characterize the water recovery potential of wastewater reclamation treatment systems: ； The method comprises: calculating the total nitrogen and total phosphorus content in the reclaimed water according to the total nitrogen and total phosphorus concentration data of the urban sewage, the type of the regeneration treatment process, the total nitrogen and total phosphorus removal rate data, and the amount of reclaimed water, constructing the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in the reclaimed water and the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in traditional synthetic fertilizers, calculating the nitrogen and phosphorus nutrition quality that can be absorbed by the crops in the reclaimed water according to the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in the reclaimed water and the total nitrogen and total phosphorus content in the reclaimed water, and calculating the amount of traditional synthetic fertilizers that can be replaced by nitrogen and phosphorus nutrition resources in the reclaimed water according to the nitrogen and phosphorus nutrition quality that can be absorbed by the crops in the reclaimed water and the efficiency data of the crops absorbing nitrogen and phosphorus nutrition in traditional synthetic fertilizers, specifically including: According to the total nitrogen concentration data of urban sewage , Urban sewage total phosphorus concentration data , regeneration process type, total nitrogen removal rate data , total phosphorus removal rate data and recycled water volume , calculate the total nitrogen content in recycled water and total phosphorus content : ； ； Collect data on the efficiency of crop absorption of nitrogen and phosphorus nutrients in recycled water, including data on the amount of nitrogen per unit mass in recycled water that can be absorbed and utilized by crops and data on the amount of phosphorus per unit mass in recycled water that can be absorbed and utilized by crops ; Collect data on the efficiency of crop absorption of nitrogen and phosphorus nutrients in traditional synthetic fertilizers, including data on the amount of nitrogen per unit mass in traditional synthetic fertilizers that can be absorbed and utilized by crops Data on the amount of phosphorus per unit mass in traditional synthetic fertilizers that can be absorbed and utilized by crops ; According to the total nitrogen content in recycled water and total phosphorus content , and data on the nitrogen per unit mass in recycled water that can be absorbed and utilized by crops and data on the amount of phosphorus per unit mass in recycled water that can be absorbed and utilized by crops Calculation of nitrogen nutrient quality in recycled water that can be absorbed by crops based on Monte Carlo method and phosphorus nutritional quality : ； ； According to the nitrogen nutrient quality that can be absorbed by crops in recycled water and phosphorus nutritional quality , and data on the amount of nitrogen per unit mass in traditional synthetic fertilizers that can be absorbed and utilized by crops Data on the amount of phosphorus per unit mass in traditional synthetic fertilizers that can be absorbed and utilized by crops Calculate the amount of traditional synthetic fertilizers that can be replaced by nitrogen nutrient resources in recycled water based on the Monte Carlo method The amount of traditional synthetic fertilizers that can be replaced by phosphorus nutrients in recycled water : ； ； in, and They respectively represent the mass proportion of the effective ingredients of nitrogen and phosphorus nutrients in a specific traditional synthetic fertilizer.

2. The method for evaluating the carbon reduction benefits of recycled water for agricultural water-fertilizer integration in the life cycle according to claim 1 is characterized in that: The life cycle carbon reduction benefit assessment method for recycled water used in agricultural water-fertilizer integration also includes: If there are multiple data on the amount of nitrogen per unit mass in recycled water that can be absorbed and utilized by crops and multiple data on the amount of phosphorus per unit mass in recycled water that can be absorbed and utilized by crops, the Monte Carlo method is used to calculate the probability distribution of the average value as the corresponding and ; If there are multiple data on the amount of nitrogen per unit mass in traditional synthetic fertilizers that can be absorbed and utilized by crops and multiple data on the amount of phosphorus per unit mass in traditional synthetic fertilizers that can be absorbed and utilized by crops, the Monte Carlo method is used to calculate the probability distribution of the average value as the corresponding and .

3. The method for evaluating the carbon reduction benefits of recycled water for agricultural water-fertilizer integration in the life cycle according to claim 1 is characterized in that: The full life cycle carbon reduction benefits of recycled water and fertilizer resources for recycled water irrigation include the carbon reduction benefits of recycled water resources for recycled water irrigation and the carbon reduction benefits of recycled nitrogen and phosphorus resources for recycled water irrigation.

4. The method for evaluating the carbon reduction benefits of the life cycle of recycled water for agricultural water-fertilizer integration according to claim 1 or 3, characterized in that: According to the amount of recycled water and the amount of traditional synthetic fertilizers that can be replaced by the nitrogen and phosphorus nutrient resources in the recycled water, the full life cycle carbon reduction benefits of recycled water and fertilizer resources for irrigation are evaluated, specifically including: For a specific traditional irrigation water resource development process, collect data on energy resource consumption and pollutant environmental emissions during the unit water production process and compile the first life cycle data inventory; Based on the amount of recycled water, a life cycle assessment model is selected according to the specific case to evaluate the life cycle carbon emissions to characterize the carbon reduction benefits of recycled water resources in recycled water irrigation; For a specific traditional synthetic fertilizer, collect data on energy resource consumption and pollutant environmental emissions during the production of unit mass of fertilizer, and compile a second life cycle data inventory; Combined with the second life cycle data inventory, based on the amount of traditional synthetic fertilizers that can be replaced by nitrogen and phosphorus nutrient resources in recycled water, a life cycle assessment model is selected according to specific cases to evaluate life cycle carbon emissions in order to characterize the carbon reduction benefits of recycled nitrogen and phosphorus resources in recycled water irrigation.

5. A system for evaluating the carbon reduction benefits of recycled water for agricultural water-fertilizer integration during its life cycle, applied to the method for evaluating the carbon reduction benefits of recycled water for agricultural water-fertilizer integration during its life cycle as claimed in any one of claims 1 to 4, characterized in that: The life cycle carbon reduction benefit assessment system for recycled water used in agricultural water-fertilizer integration includes: A data set construction module is used to construct a data set of an urban sewage regeneration treatment system, wherein the data set of the urban sewage regeneration treatment system includes urban sewage water volume data, urban sewage total nitrogen and total phosphorus concentration data, and sewage regeneration treatment system efficiency data, wherein the sewage regeneration treatment system efficiency data includes regeneration treatment process type, water resource loss rate data of the regeneration treatment process, and total nitrogen and total phosphorus removal rate data; A recycling potential calculation module, used to calculate the amount of recycled water based on the urban sewage volume data and the water resource loss rate data of the recycling treatment process to characterize the water resource recycling potential; A traditional synthetic fertilizer dosage calculation module is used to calculate the total nitrogen and total phosphorus content in the reclaimed water according to the total nitrogen and total phosphorus concentration data of the urban sewage, the type of the regeneration treatment process, the total nitrogen and total phosphorus removal rate data, and the amount of reclaimed water, to construct efficiency data of crops absorbing nitrogen and phosphorus nutrition in the reclaimed water and efficiency data of crops absorbing nitrogen and phosphorus nutrition in traditional synthetic fertilizers, to calculate the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in the reclaimed water according to the efficiency data of crops absorbing nitrogen and phosphorus nutrition in the reclaimed water and the total nitrogen and total phosphorus content in the reclaimed water, and to calculate the amount of traditional synthetic fertilizers that can replace nitrogen and phosphorus nutrition resources in the reclaimed water according to the quality of nitrogen and phosphorus nutrition that can be absorbed by crops in the reclaimed water and the efficiency data of crops absorbing nitrogen and phosphorus nutrition in traditional synthetic fertilizers; The carbon reduction benefit evaluation module is used to evaluate the carbon reduction benefits of recycled water and fertilizer resources over the entire life cycle of recycled water irrigation based on the amount of recycled water and the amount of traditional synthetic fertilizers that can be replaced by the nitrogen and phosphorus nutrient resources in the recycled water.

6. A terminal, characterized in that: The terminal includes: a memory, a processor, and a life cycle carbon reduction benefit assessment program for recycled water used for agricultural water-fertilizer integration, which is stored in the memory and can be run on the processor. When the life cycle carbon reduction benefit assessment program for recycled water used for agricultural water-fertilizer integration is executed by the processor, the steps of the life cycle carbon reduction benefit assessment method for recycled water used for agricultural water-fertilizer integration are implemented as described in any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a life cycle carbon reduction benefit assessment program for the use of recycled water for agricultural water-fertilizer integration. When the life cycle carbon reduction benefit assessment program for the use of recycled water for agricultural water-fertilizer integration is executed by the processor, the steps of the life cycle carbon reduction benefit assessment method for the use of recycled water for agricultural water-fertilizer integration as described in any one of claims 1-4 are implemented.

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