A method, system, terminal and storage medium for generating a multi-objective optimization strategy for recycled water irrigation

Abstract

The present invention discloses a method, system, terminal and storage medium for generating a multi-objective optimization strategy for reclaimed water irrigation, the method comprising: constructing a reclaimed water quantity and quality data set; simulating the health risk of new pollutants exposed to the human food web; calculating the amount of traditional synthetic fertilizers required by crops when using reclaimed water for irrigation; estimating nitrous oxide emissions from reclaimed water irrigation; constructing a reclaimed water directional irrigation strategy based on multi-objective collaborative optimization; calling a remote controller to automatically implement the reclaimed water directional irrigation strategy. The present invention focuses on the crop absorption process at the end of reclaimed water irrigation, and proposes a reclaimed water directional irrigation strategy based on the principle of multi-objective collaborative optimization, which can effectively prevent and control the health risks caused by the accumulation of new pollutants in reclaimed water, reduce greenhouse gas emissions during the process of reclaimed water irrigation, and improve the utilization efficiency of nitrogen and phosphorus resources in reclaimed water.

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 generating a multi-objective optimization strategy for recycled water irrigation. Background Art

[0002] Recycling and resource utilization of urban sewage has become an important means to solve the shortage of conventional water resources in arid or semi-arid areas. Urban domestic sewage has a large volume of water and contains a large amount of crop nutrients such as nitrogen and phosphorus. It is an ideal alternative to traditional agricultural irrigation and fertilization integration. However, urban sewage comes from social life and is an important carrier for the migration and transformation of multi-source pollutants. In recent years, many studies have detected new pollutants at different concentrations in urban domestic sewage. New pollutants refer to toxic and harmful chemical substances that are discharged into the environment and have characteristics such as biological toxicity, environmental persistence, and bioaccumulation, which pose a great risk to the ecosystem or human health, but have not yet been included in the management or the existing management measures are insufficient. Existing sewage recycling and treatment facilities usually do not have the ability to efficiently remove new pollutants. When recycled water is used for irrigation, the new pollutants in the residual recycled water are easily absorbed and accumulated by crops, and then exposed to the human body through the food chain, causing health risks. Therefore, based on the coexistence contradiction between risk substances and resource substances in recycled water, how to minimize the health risks that may be caused by new pollutants in recycled water and maximize the recycling of nitrogen and phosphorus resource substances in recycled water is the core key to achieving safe and efficient irrigation utilization of recycled water.

[0003] Current scientific research and engineering practice have the sole goal of strengthening the regeneration process to remove new pollutants, which has resulted in a large amount of electricity and reagent consumption. The production and use of these resources and energy will also have negative environmental impacts and huge economic pressures. On the other hand, while existing strengthening technologies remove new pollutants, they will also simultaneously remove nitrogen and phosphorus nutrients in the regenerated water, significantly weakening the resource attributes of the regenerated water. Therefore, it is difficult to achieve efficient recovery of nitrogen and phosphorus nutrient resources and effective control of new pollutant risks by relying solely on the upgrade of the regeneration process.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] The main purpose of the present invention is to provide a method, system, terminal and computer-readable storage medium for generating a multi-objective optimization strategy for recycled water irrigation, aiming to solve the problem in the prior art that it is difficult to coordinately achieve efficient recovery of nitrogen and phosphorus nutrient resources and effective prevention and control of new pollutant risks by only relying on the upgrade of regeneration treatment processes.

[0006] To achieve the above object, the present invention provides a method for generating a multi-objective optimization strategy for reclaimed water irrigation, the method comprising the following steps:

[0007] Constructing a recycled water quantity and quality data set, wherein the recycled water quantity and quality data set includes recycled water quantity, total nitrogen concentration in recycled water, total phosphorus concentration in recycled water, new pollutant types, and new pollutant concentrations;

[0008] Based on the recycled water quantity and quality dataset and the PLANTX crop absorption simulation model based on a cascade perspective, collect data on the toxic effects of new pollutants and simulate the health risks of new pollutants exposed to the human food web;

[0009] Construct a dataset of the efficiency of crop absorption of nitrogen and phosphorus nutrients in recycled water and traditional synthetic fertilizers, calculate the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the recycled water based on the total nitrogen concentration and the total phosphorus concentration in the recycled water, collect the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer used for crops when not irrigated with recycled water, and calculate the amount of traditional synthetic fertilizer required for crops when irrigated with recycled water based on the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the recycled water;

[0010] According to the total nitrogen concentration in the reclaimed water, the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water under the action of soil microorganisms is calculated; according to the additional amount of traditional nitrogen fertilizer, the nitrous oxide emitted by direct and indirect conversion of nitrogen in traditional nitrogen fertilizers under the action of soil microorganisms is calculated, and the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water is added to obtain the nitrous oxide emission from the use of reclaimed water for irrigation;

[0011] Based on the health risks caused by exposure of new pollutants to the human food web, the additional amount of traditional synthetic fertilizers required for crops when using recycled water for irrigation, and the nitrous oxide emissions from recycled water irrigation, a recycled water directional irrigation strategy based on multi-objective collaborative optimization is constructed.

[0012] In addition, to achieve the above-mentioned purpose, the present invention also provides a system for generating a multi-objective optimization strategy for reclaimed water irrigation, wherein the system for generating a multi-objective optimization strategy for reclaimed water irrigation comprises:

[0013] A data set construction module is used to construct a recycled water quantity and quality data set, wherein the recycled water quantity and quality data set includes the recycled water quantity, the total nitrogen concentration in the recycled water, the total phosphorus concentration in the recycled water, the types of new pollutants, and the concentrations of new pollutants;

[0014] A health risk assessment module, for collecting toxic effect data of new pollutants based on the recycled water quantity and quality data set and the PLANTX crop absorption simulation model based on a cascade perspective, and simulating the health risks of new pollutants exposed to the human food web;

[0015] The additional dosage calculation module is used to construct an efficiency data set of crop absorption of nitrogen and phosphorus nutrients in recycled water and traditional synthetic fertilizers, calculate the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the recycled water according to the total nitrogen concentration and the total phosphorus concentration in the recycled water, collect the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer used by crops when recycled water is not used for irrigation, and calculate the additional amount of traditional synthetic fertilizer required by crops when recycled water is used for irrigation based on the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the recycled water;

[0016] An emission calculation module is used to calculate the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water under the action of soil microorganisms according to the total nitrogen concentration in the reclaimed water, calculate the nitrous oxide emitted by direct and indirect conversion of nitrogen in traditional nitrogen fertilizers under the action of soil microorganisms according to the additional amount of traditional nitrogen fertilizers, and add the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water to obtain the nitrous oxide emission of reclaimed water irrigation;

[0017] The irrigation strategy optimization module is used to construct a reclaimed water directional irrigation strategy based on multi-objective collaborative optimization according to the health risks caused by exposure of new pollutants to the human food web, the additional amount of traditional synthetic fertilizers required for crops when irrigated with reclaimed water, and the nitrous oxide emissions from reclaimed water irrigation.

[0018] 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 generation program for a multi-objective optimization strategy for reclaimed water irrigation stored in the memory and executable on the processor, wherein the generation program for a multi-objective optimization strategy for reclaimed water irrigation implements the steps of the generation method for a multi-objective optimization strategy for reclaimed water irrigation as described above when the generation program for a multi-objective optimization strategy for reclaimed water irrigation is executed by the processor.

[0019] 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 generation program for a multi-objective optimization strategy for reclaimed water irrigation, and when the generation program for a multi-objective optimization strategy for reclaimed water irrigation is executed by a processor, the steps of the generation method for a multi-objective optimization strategy for reclaimed water irrigation as described above are implemented.

[0020] In the present invention, a reclaimed water quantity and quality dataset is constructed, and the reclaimed water quantity and quality dataset includes the quantity of reclaimed water, the total nitrogen concentration in reclaimed water, the total phosphorus concentration in reclaimed water, the types of new pollutants and the concentrations of new pollutants; according to the reclaimed water quantity and quality dataset and the PLANTX crop absorption simulation model based on the cascade perspective, the toxic effect data of new pollutants are collected to simulate the health risks caused by the exposure of new pollutants to the human food web; a dataset of the efficiency of crop absorption of nitrogen and phosphorus nutrients in reclaimed water and traditional synthetic fertilizers is constructed, and according to the total nitrogen concentration in the reclaimed water and the total phosphorus concentration in the reclaimed water, the amount of traditional nitrogen fertilizer and the amount of traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the reclaimed water are calculated, and the traditional nitrogen fertilizer and the amount of traditional phosphorus fertilizer used by crops when reclaimed water is not used for irrigation are collected, and the efficiency is calculated by combining the amount of traditional nitrogen fertilizer and the amount of traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the reclaimed water. The additional amount of traditional synthetic fertilizers required for crops when irrigated with recycled water; based on the total nitrogen concentration in the recycled water, calculating the nitrous oxide emitted by the direct and indirect conversion of nitrogen in the recycled water under the action of soil microorganisms; based on the additional amount of traditional nitrogen fertilizer, calculating the nitrous oxide emitted by the direct and indirect conversion of nitrogen in traditional nitrogen fertilizers under the action of soil microorganisms, and adding the nitrous oxide emitted by the direct and indirect conversion of nitrogen in the recycled water to obtain the nitrous oxide emissions from recycled water irrigation; constructing a recycled water directional irrigation strategy based on multi-objective collaborative optimization based on the health risks caused by exposure of new pollutants to the human food web, the additional amount of traditional synthetic fertilizers required for crops when irrigated with recycled water, and the nitrous oxide emissions from recycled water irrigation; based on the recycled water directional irrigation strategy, using the Internet of Things technology, calling a remote controller to automatically control irrigation equipment to implement the recycled water directional irrigation strategy. The present invention focuses on the crop absorption process at the end of recycled water irrigation, proposes a recycled water directional irrigation strategy based on the principle of multi-objective collaborative optimization, and establishes an intelligent and efficient strategy generation method and an automated application system. The generated recycled water directional irrigation strategy can also effectively prevent the health risks caused by the accumulation of new pollutants in recycled water, reduce greenhouse gas emissions in the process of recycled water irrigation, and improve the utilization efficiency of nitrogen and phosphorus resources in recycled water. Ultimately, a recycled water irrigation utilization strategy and an automated application system with green, low-carbon, and safe multi-objective collaborative development optimization are formed, providing key strategic methods and technical means for promoting green, low-carbon and sustainable development of coordinated water and agricultural systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a flow chart of a preferred embodiment of a method for generating a multi-objective optimization strategy for recycled water irrigation according to the present invention;

[0022] Figure 2 It is a structural diagram of a preferred embodiment of a system for generating a multi-objective optimization strategy for recycled water irrigation according to the present invention;

[0023] Figure 3 It is a structural diagram of a preferred embodiment of the terminal of the present invention. DETAILED DESCRIPTION

[0024] 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.

[0025] Aiming at the difficulty of green, low-carbon and safe multi-objective coordinated development of recycled water agricultural irrigation, the present invention proposes a strategic idea of ​​using recycled water for irrigation based on crop characteristics, and forms a scientific technical method and application system.

[0026] This strategy is centered on utilizing differentiated crop characteristics. Based on a systematic evaluation of the nutrient resource recovery potential, new pollutant health risks, and nitrous oxide emissions of recycled water irrigation, a multi-objective optimization intelligent algorithm is used to generate a strategy for directional utilization of recycled water resources to irrigate designated crops. In combination with the Internet of Things technology, the automated control of the irrigation system is realized to execute the directional strategy, and a method and application system for generating a directional irrigation strategy for recycled water that is green, low-carbon, and safe is established. Different from the development idea of ​​improving the removal capacity of the regeneration process to ensure water safety, this invention focuses on the crop absorption process at the end of recycled water irrigation, proposes a directional irrigation strategy for recycled water based on the principle of multi-objective collaborative optimization, and establishes an intelligent and efficient strategy generation method and an automated application system. At the same time, unlike irrigation strategies that only consider crop water demand, the recycled water directional irrigation strategy generated by the present invention can also effectively prevent the health risks caused by the accumulation of new pollutants in recycled water, reduce greenhouse gas emissions during recycled water irrigation, and improve the utilization efficiency of nitrogen and phosphorus resources in recycled water. Ultimately, a recycled water irrigation utilization strategy and automated application system optimized for green, low-carbon, and safe multi-objective coordinated development is formed, providing key strategic methods and technical means for promoting green, low-carbon and sustainable development of coordinated water and agricultural systems.

[0027] The method for generating a multi-objective optimization strategy for reclaimed water irrigation according to a preferred embodiment of the present invention is as follows: Figure 1 As shown, the method for generating the multi-objective optimization strategy for recycled water irrigation includes the following steps:

[0028] Step S10, constructing a reclaimed water quantity and quality data set, wherein the reclaimed water quantity and quality data set includes the reclaimed water quantity, the total nitrogen concentration in the reclaimed water, the total phosphorus concentration in the reclaimed water, the types of new pollutants, and the concentrations of new pollutants.

[0029] Specifically, the step S10 specifically includes:

[0030] Step S101: using the Internet of Things technology to obtain real-time monitoring data collected by sensors deployed at the outlet of the sewage reclamation treatment facility;

[0031] The real-time monitoring data include: recycled water volume , Total nitrogen concentration in recycled water , total phosphorus concentration in recycled water , New types of pollutants and new pollutant concentrations ;

[0032] Step S102: Use the real-time monitoring data as a recycled water quantity and quality data set.

[0033] Because new pollutants are of various types and their concentration levels vary greatly, the Chinese and English names, CAS numbers and classification names of new pollutants should be recorded at the same time, and the original units of the concentration data should be marked.

[0034] Step S20: According to the recycled water quantity and quality data set and the PLANTX crop absorption simulation model based on the cascade perspective, the toxic effect data of new pollutants are collected to simulate the health risks caused by the exposure of new pollutants to the human food web.

[0035] Specifically, the step S20 includes:

[0036] Step S201, constructing a new pollution physical and chemical characteristic data set according to the type of new pollutant, the new pollution physical and chemical characteristic data set includes relative molecular mass, octanol-water partition coefficient, gas-liquid partition coefficient, dissociation constant, acidity and alkalinity, electronic valence state and soil degradation rate; the relevant data are mainly derived from multiple public databases, including the EPI Suite (full name Estimation Programs Interface), USESLCA database, Chemicalize material chemical structure information database and Drugbank comprehensive drug database, or obtained by investigating scientific literature.

[0037] Step S202: Collect agronomic information data of the area where recycled water is used for irrigation; specifically, the data in Table 1 below are included:

[0038] Table 1: Regional agronomic information dataset for recycled water irrigation

[0039]

[0040] Among them, the specific data items and main data sources are as follows:

[0041] (1) Collect crop planting data in areas where recycled water is used for irrigation, including major crop types and their planting areas, planting methods (crop rotation or cropping system) and yield per unit area. The relevant data mainly come from the economic statistical yearbooks of specific regions.

[0042] (2) Collect crop growth characteristic data, including growth period (germination and harvest date) and transpiration coefficient, as well as water content, initial and final weight, and growth rate data of the four major tissue parts: roots, stems, leaves, and fruits. The relevant data mainly come from scientific and technological literature.

[0043] (3) Collect information on irrigation systems for crops in areas where recycled water is used for irrigation, including crop irrigation water intensity, irrigation dates, and irrigation times. Relevant data can be sourced from regional survey questionnaires, statistical yearbooks, and scientific literature.

[0044] (4) Collect meteorological data on areas where recycled water is used for irrigation, including rainfall, potential evaporation, surface runoff, ground temperature, soil temperature, maximum temperature, minimum temperature, and relative humidity. Relevant data can be found at the National Meteorological Information Center by geographical region. Among them, potential evaporation can be estimated based on the Hargreaves-Samani method, surface runoff can be estimated based on rainfall, and the temperature of different soil layers can be estimated based on the surface temperature using linear interpolation method according to soil layer thickness.

[0045] (5) Collect soil condition data in areas where recycled water is used for irrigation, including soil density, moisture content, field holding capacity, and wilting point. The relevant data mainly come from scientific and technological literature.

[0046] Step S203: Integrate the new pollution physical and chemical characteristic data set, the agronomic information data of the recycled water irrigation area and the new pollutant concentration , and input into the PLANTX crop absorption simulation model based on cascade perspective.

[0047] Step S204: For each type of crop involved in the recycled water irrigation area, the PLANTX crop absorption simulation model based on the cascade perspective is run one by one to output the accumulation concentration of the new pollutant in the edible part of the crop. ,in, Indicates the type of crop.

[0048] Step S205: For the simulation of the accumulated concentration of the same new pollutant in different crops, the crop planting, growth, and irrigation system data sets called in the above step S203 are changed according to the specific crop types, and then the PLANTX model is run; for the simulation of the accumulated concentration of different new pollutants in the same crop, the new pollutant concentration data and physical and chemical characteristics data sets called in step S203 are changed according to the specific new pollutant types, and then the PLANTX model is run.

[0049] Step S206: Based on the specific crop type, call the crop yield data per unit area collected from the agronomic information data of the reclaimed water irrigation area collected in step S202. , calculate the mass of new pollutants accumulated per unit area of ​​land when crops are irrigated with recycled water :

[0050] .

[0051] Step S207, collect toxic effect data of new pollutants, including effect factors based on midpoint level (referring to the increased probability of illness due to intake of a certain unit mass of pollutants, in units of cases / kg) and damage factors based on endpoint level (characterizing the level of damage caused by illness to human health, in units of DALYs / cases). According to different disease types, the effect factors based on midpoint level include carcinogenic effect factors and non-carcinogenic effectors The damage factors based on the endpoint level include carcinogenic damage factors and non-carcinogenic damaging factors , such as carcinogenic factors and non-carcinogenic damaging factors The values ​​are 11.5 DALYs / cases and 2.7 DALYs / cases. The effect factor and damage factor data are derived from the USEtox toxic effect simulation model.

[0052] Step S208: According to the type of new pollutant, the new pollutant toxicity effect data set constructed in step S206 is called, and based on the calculation results of the above step S205, the health risks caused by the carcinogenic toxicity effect are calculated respectively. Health risks from non-carcinogenic toxic effects :

[0053] ;

[0054] .

[0055] Step S209: For the complex effects of the health risks of multiple new pollutants in the same crop, existing studies have not yet reached a clear and unified conclusion on its compound mechanism. Common compound mechanisms include linear superposition, dominance and independent effects. The present invention uses a linear superposition model to preliminarily simulate the use of recycled water to irrigate the same crop per unit area of ​​land, and calculates the health risks caused by the accumulation of multiple new pollutants in edible parts. :

[0056] .

[0057] Step S30, constructing a data set of the efficiency of crop absorption of nitrogen and phosphorus nutrients in recycled water and traditional synthetic fertilizers, calculating the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the recycled water according to the total nitrogen concentration and the total phosphorus concentration in the recycled water, collecting the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer used for crops when recycled water is not used for irrigation, and combining the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the recycled water to calculate the additional amount of traditional synthetic fertilizer required for crops when recycled water is used for irrigation.

[0058] Specifically, the step S30 includes:

[0059] Step S301: Construct a crop nitrogen and phosphorus nutrient utilization data set, including the efficiency data of crop absorption of nitrogen nutrition in recycled water , data on the efficiency of crop absorption of phosphorus nutrients from recycled water , data on the efficiency of crops absorbing nitrogen nutrients from traditional fertilizers , data on the efficiency of crops absorbing nitrogen and phosphorus nutrients from traditional fertilizers , and conventional nitrogen fertilizer use when crops are not irrigated with recycled water and conventional phosphate fertilizer use when crops are not irrigated with recycled water ; Among them, the common sources of efficiency data are field trial reports or scientific literature, while the traditional nitrogen and phosphorus fertilizer usage of crops when not irrigated with recycled water is often derived from local economic statistical yearbooks.

[0060] Step S302: calling the total nitrogen concentration in the recycled water , the total phosphorus concentration in the reclaimed water , the crop irrigation water intensity data in the agronomic information data of the recycled water irrigation area , data on the efficiency of the crops in absorbing nitrogen nutrients from recycled water and data on the efficiency of the crop in absorbing phosphorus nutrients from recycled water , calculate the amount of nitrogen resources recovered per unit area of ​​land by using recycled water to irrigate crops and phosphorus resources :

[0061] ;

[0062] .

[0063] Step S303: nitrogen resource amount according to the calculation result of step S302 and phosphorus resources , using data on the efficiency of the crop in absorbing nitrogen nutrients from traditional fertilizers and data on the efficiency of the crops in absorbing nitrogen and phosphorus nutrients from traditional fertilizers , calculate the amount of traditional nitrogen fertilizer that can be replaced by using recycled water to irrigate crops per unit area of ​​land and traditional phosphate fertilizer usage :

[0064] ;

[0065] ;

[0066] in, and They respectively represent the mass proportion of effective nitrogen nutrients in traditional nitrogen fertilizers and the mass proportion of effective phosphorus nutrients in traditional phosphorus fertilizers, and are generally calculated based on the mass proportion of elements in the chemical formula of the fertilizer.

[0067] Step S304: according to the traditional nitrogen fertilizer dosage of crops when they are not irrigated with recycled water , Traditional phosphate fertilizer usage for crops not irrigated with recycled water , the amount of traditional nitrogen fertilizer that can be replaced by using recycled water to irrigate crops per unit area of ​​land and traditional phosphate fertilizer usage , calculate the additional amount of traditional nitrogen fertilizer required for crops per unit area of ​​land when irrigated with recycled water and traditional phosphate fertilizer usage :

[0068] ;

[0069] .

[0070] Step S305: calculate the amount of traditional nitrogen fertilizer required for crops when irrigating with recycled water per unit area of ​​land. and traditional phosphate fertilizer usage Add up and get the additional amount of traditional synthetic fertilizers :

[0071] .

[0072] Step S40: Calculate the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water under the action of soil microorganisms based on the total nitrogen concentration in the reclaimed water; calculate the nitrous oxide emitted by direct and indirect conversion of nitrogen in traditional nitrogen fertilizers under the action of soil microorganisms based on the additional amount of traditional nitrogen fertilizers; and add the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water to obtain the nitrous oxide emission from reclaimed water irrigation.

[0073] Specifically, the step S40 includes:

[0074] Step S401: according to the total nitrogen concentration in the reclaimed water and the crop irrigation water intensity data Calculate the nitrous oxide emissions generated by the conversion of nitrogen in the soil microorganisms when reclaimed water is used for irrigation per unit area of ​​land. :

[0075] ;

[0076] in, and are emission factors used to describe direct and indirect emission pathways respectively; for example, The value is 0.79%, Value and Same, but also needs to be combined with the proportion of volatile nitrogen in recycled water Perform calculations, The value is 0.21%.

[0077] Step S402: Calling the amount of traditional nitrogen fertilizer required for crops when irrigating with recycled water per unit area of ​​land Calculate the nitrous oxide emissions generated by the conversion of additional nitrogen in traditional nitrogen fertilizers used for irrigation with recycled water per unit area of ​​land under the action of soil microorganisms :

[0078] ;

[0079] in, Indicates the proportion of volatile nitrogen in conventional nitrogen fertilizers; for example, The value is 0.11%.

[0080] Step S403: Calculate the nitrous oxide emissions per unit area of ​​land when irrigating with recycled water :

[0081] .

[0082] Step S50: construct a reclaimed water directional irrigation strategy based on multi-objective collaborative optimization according to the health risks caused by exposure of new pollutants to the human food web, the additional amount of traditional synthetic fertilizers required for crops when irrigated with reclaimed water, and the nitrous oxide emissions from reclaimed water irrigation.

[0083] Specifically, the step S50 includes:

[0084] Step S501: Health risks caused by exposure of new pollutants to human food web , the additional amount of traditional synthetic fertilizers required for crops when irrigated with recycled water and nitrous oxide emissions from recycled water irrigation , with the irrigation area of ​​a specific crop as the decision variable , construct a functional expression of a single optimization objective:

[0085] ;

[0086] ;

[0087] ;

[0088] in, Indicates the health risks of using recycled water to irrigate crops in the study area, It indicates the amount of additional traditional fertilizers needed when using recycled water to irrigate crops in the study area. It represents the nitrous oxide emissions generated when recycled water is used to irrigate crops in the study area.

[0089] Step S502: Call the crop irrigation water intensity data , combined with the amount of recycled water , construct the functional expression of water quantity constraint:

[0090] .

[0091] Step S503: call the crop planting area data in the agronomic information data of the recycled water irrigation area , considering that the area of ​​each crop irrigated with recycled water should not be larger than the original planting area of ​​the crop, the functional expression of the land constraint is constructed:

[0092] .

[0093] Step S504: Set the decision variables , functions of a single optimization objective, water constraints and land constraints, were integrated in excel software to run the Oracle Crystal Ball plug-in.

[0094] Step S505: Use the OptQuest tool of the Oracle Crystal Ball plug-in to calculate the objective function value when the single objective is optimal for each objective function. ,in, represents specific optimization objectives; namely, minimization of health risks, minimization of additional use of conventional synthetic fertilizers, and minimization of nitrous oxide emissions.

[0095] Step S506: Calculate the irrigation area of ​​each crop under the baseline by using the reclaimed water directional irrigation strategy with average water distribution for irrigation of crops. :

[0096] ;

[0097] in, Indicates the number of crop types involved in the area of ​​recycled water irrigation;

[0098] according to Calculate the objective function value of each optimization target under the benchmark condition .

[0099] Step S507: construct the objective function of multi-objective collaborative optimization:

[0100] ;

[0101] in, It represents the overall satisfaction of multiple objectives, dimensionless, and its value depends on the minimum value of the satisfaction of a single objective among multiple optimization objectives, that is, , Indicates satisfaction with a single goal:

[0102] ;

[0103] in, , and They represent the objective function values ​​of the optimization objectives in the baseline situation, in the multi-objective collaborative optimization process, and when a single objective is optimal.

[0104] Step S508: according to the objective function of multi-objective collaborative optimization, find the maximum overall satisfaction value Combination, denoted as ,Right now It represents the multi-objective collaborative optimization strategy of recycled water directional irrigation.

[0105] Furthermore, after obtaining the reclaimed water directional irrigation strategy, based on the reclaimed water directional irrigation strategy, the Internet of Things technology is used to call a remote controller to automatically control the irrigation equipment to implement the reclaimed water directional irrigation strategy.

[0106] Compared with the prior art, the present invention has the following key differences and advantages:

[0107] (1) In response to the coexistence of resource substances and risk substances in recycled water, the present invention breaks through the existing solution approach that relies solely on upgrading the recycling process. It proposes to focus on the absorption and utilization process of terminal crops. Based on the differences in the water and fertilizer utilization characteristics of crops and the accumulation effects on new pollutants, a strategy for directional irrigation utilization of recycled water is constructed to minimize the trade-off between resource recovery and health risks. This can effectively improve the utilization efficiency of nitrogen and phosphorus resources in sewage, while significantly reducing the potential risk of new pollutants.

[0108] (2) The present invention adopts a multi-objective optimization approach. By scientifically and quantitatively evaluating the health risks of recycled water irrigation, the amount of alternative traditional synthetic fertilizers, and nitrous oxide emissions, the present invention uses a fuzzy linear programming-based solution approach to develop a recycled water directional irrigation strategy that coordinately optimizes the three objectives of minimizing health risks, minimizing the additional use of traditional synthetic fertilizers, and minimizing nitrous oxide emissions. This provides a path reference and technical support for promoting the safe, efficient, green, and low-carbon development of sewage regeneration and irrigation.

[0109] (3) The algorithm framework constructed by the present invention has modular characteristics. The data set it calls is expandable, the optimization objectives involved are scalable, and the solution algorithm adopted is upgradeable. With the development of environmental monitoring and chemical analysis technology, environmental management goal concepts and artificial intelligence algorithms, the relevant data sets, optimization objectives and solution algorithms can be further improved to improve the efficiency of strategy formation and the capabilities of the strategy itself.

[0110] (4) The idea and algorithm framework of the reclaimed water directional irrigation strategy proposed in the present invention can be coordinated and unified with the intelligent development of agricultural irrigation equipment systems in the future. For example, in-situ sensors can be used to quickly and accurately measure the concentrations of nitrogen, phosphorus and new pollutants in reclaimed water and transmit them to the algorithm terminal to form a multi-objective collaborative optimization reclaimed water directional irrigation strategy. The optimal directional irrigation strategy is then transmitted to the control system of agricultural irrigation equipment to realize the automated generation and practice of the reclaimed water directional irrigation strategy, greatly improving the multi-dimensional benefits of agricultural irrigation while ensuring the safe, efficient, green and low-carbon use of reclaimed water.

[0111] Aiming at the key problem of resource recovery and health risks in the use of recycled water for irrigation, the core of the present invention is to focus on the end-crop utilization process of recycled water, construct a simulation evaluation method for the health risks of new pollutants in the use of recycled water for irrigation, the amount of alternative traditional synthetic fertilizers, and nitrous oxide emissions, propose a framework for constructing a directional irrigation strategy based on crop characteristics, and establish an intelligent algorithm for multi-objective collaborative optimization to construct a directional irrigation utilization strategy for recycled water, and achieve safe, green, and low-carbon multi-objective collaborative optimization of recycled water irrigation. Among them, for the setting of optimization targets, the number of targets can be increased or decreased according to specific circumstances, but it should be noted that too many targets will greatly increase the complexity and calculation time of multi-objective optimization problem solving; for the establishment method of multi-objective optimization function, linear programming based on fuzzy criteria is one of the classic methods, and other main solution methods include weighted linear and reference points, etc., which can be comprehensively considered and selected according to actual conditions; for the solution of multi-objective optimization problems, the present invention adopts the built-in algorithm of the OptQuest tool of the Oracle Crystal Ball plug-in, that is, the meta-heuristic algorithm based on taboo search and scattered search, and can also consider the use of genetic algorithms, evolutionary algorithms, particle swarm optimization algorithms, ant colony algorithms and other intelligent algorithms.

[0112] Furthermore, if Figure 2 As shown, based on the above-mentioned method for generating a multi-objective optimization strategy for reclaimed water irrigation, the present invention also provides a system for generating a multi-objective optimization strategy for reclaimed water irrigation, wherein the system for generating a multi-objective optimization strategy for reclaimed water irrigation comprises:

[0113] A data set construction module 51 is used to construct a reclaimed water quantity and quality data set, wherein the reclaimed water quantity and quality data set includes the reclaimed water quantity, the total nitrogen concentration in the reclaimed water, the total phosphorus concentration in the reclaimed water, the types of new pollutants, and the concentrations of new pollutants;

[0114] A health risk assessment module 52 is used to collect toxic effect data of new pollutants based on the recycled water quantity and quality data set and the PLANTX crop absorption simulation model based on the cascade perspective, and simulate the health risks caused by the exposure of new pollutants to the human food web;

[0115] The additional dosage calculation module 53 is used to construct an efficiency data set of crop absorption of nitrogen and phosphorus nutrients in recycled water and traditional synthetic fertilizers, calculate the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the recycled water according to the total nitrogen concentration in the recycled water and the total phosphorus concentration in the recycled water, collect the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer used by crops when the recycled water is not used for irrigation, and calculate the amount of traditional synthetic fertilizers that are additionally required for crops when the recycled water is used for irrigation based on the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the recycled water;

[0116] The emission calculation module 54 is used to calculate the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water under the action of soil microorganisms according to the total nitrogen concentration in the reclaimed water, calculate the nitrous oxide emitted by direct and indirect conversion of nitrogen in traditional nitrogen fertilizers under the action of soil microorganisms according to the additional traditional nitrogen fertilizer dosage, and add the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water to obtain the nitrous oxide emission of reclaimed water irrigation;

[0117] The irrigation strategy optimization module 55 is used to construct a reclaimed water directional irrigation strategy based on multi-objective collaborative optimization according to the health risks caused by exposure of new pollutants to the human food web, the additional amount of traditional synthetic fertilizers required for crops when irrigated with reclaimed water, and the nitrous oxide emissions from reclaimed water irrigation.

[0118] Furthermore, if Figure 3 As shown, based on the above-mentioned method and system for generating a multi-objective optimization strategy for recycled water irrigation, the present invention also provides a terminal accordingly, and the terminal 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.

[0119] 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 memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (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, the memory 20 stores a generation program 40 for a multi-objective optimization strategy for reclaimed water irrigation, and the generation program 40 for a multi-objective optimization strategy for reclaimed water irrigation can be executed by the processor 10, thereby realizing the generation method of a multi-objective optimization strategy for reclaimed water irrigation in the present application.

[0120] 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 method for generating the multi-objective optimization strategy for reclaimed water irrigation.

[0121] 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 components 10-30 of the terminal communicate with each other via a system bus.

[0122] In one embodiment, when the processor 10 executes the program 40 for generating the multi-objective optimization strategy for reclaimed water irrigation in the memory 20, the steps of the method for generating the multi-objective optimization strategy for reclaimed water irrigation as described above are implemented.

[0123] The present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a program for generating a multi-objective optimization strategy for reclaimed water irrigation, and when the program for generating a multi-objective optimization strategy for reclaimed water irrigation is executed by a processor, the steps of the method for generating a multi-objective optimization strategy for reclaimed water irrigation as described above are implemented.

[0124] 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.

[0125] 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.

[0126] 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 generating a multi-objective optimization strategy for recycled water irrigation, characterized in that: The method for generating the multi-objective optimization strategy for recycled water irrigation includes: Constructing a recycled water quantity and quality data set, wherein the recycled water quantity and quality data set includes recycled water quantity, total nitrogen concentration in recycled water, total phosphorus concentration in recycled water, new pollutant types, and new pollutant concentrations; Based on the recycled water quantity and quality dataset and the PLANTX crop absorption simulation model based on a cascade perspective, collect data on the toxic effects of new pollutants and simulate the health risks of new pollutants exposed to the human food web; Construct a dataset of the efficiency of crop absorption of nitrogen and phosphorus nutrients in recycled water and traditional synthetic fertilizers, calculate the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the recycled water based on the total nitrogen concentration and the total phosphorus concentration in the recycled water, collect the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer used for crops when not irrigated with recycled water, and calculate the amount of traditional synthetic fertilizer required for crops when irrigated with recycled water based on the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the recycled water; According to the total nitrogen concentration in the reclaimed water, the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water under the action of soil microorganisms is calculated; according to the additional amount of traditional nitrogen fertilizer, the nitrous oxide emitted by direct and indirect conversion of nitrogen in traditional nitrogen fertilizers under the action of soil microorganisms is calculated, and the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water is added to obtain the nitrous oxide emission from the use of reclaimed water for irrigation; Based on the health risks caused by exposure of new pollutants to the human food web, the additional amount of traditional synthetic fertilizers required for crops when using recycled water for irrigation, and the nitrous oxide emissions from recycled water irrigation, a recycled water directional irrigation strategy based on multi-objective collaborative optimization is constructed.

2. The method for generating a multi-objective optimization strategy for reclaimed water irrigation according to claim 1, characterized in that: The reclaimed water quantity and quality dataset is constructed, and the reclaimed water quantity and quality dataset includes the reclaimed water quantity, the total nitrogen concentration in the reclaimed water, the total phosphorus concentration in the reclaimed water, the new pollutant types and the new pollutant concentrations, specifically including: Obtain real-time monitoring data collected by sensors deployed at the outlet of wastewater reclamation and treatment facilities; The real-time monitoring data include: recycled water volume , Total nitrogen concentration in recycled water , total phosphorus concentration in recycled water , New types of pollutants and new pollutant concentrations ; The real-time monitoring data is used as a recycled water quantity and quality data set.

3. The method for generating a multi-objective optimization strategy for reclaimed water irrigation according to claim 2, characterized in that: According to the recycled water quantity and quality data set and the PLANTX crop absorption simulation model based on the cascade perspective, the toxic effect data of new pollutants are collected to simulate the health risks caused by the exposure of new pollutants to the human food web, specifically including: According to the types of new pollutants, a new pollution physical and chemical characteristic data set is constructed, wherein the new pollution physical and chemical characteristic data set includes relative molecular mass, octanol-water partition coefficient, gas-liquid partition coefficient, dissociation constant, acidity and alkalinity, electronic valence state and soil degradation rate; Collect agronomic information data on areas using recycled water for irrigation; Integrate the physical and chemical characteristics data set of the new pollution, the agronomic information data of the recycled water irrigation area and the concentration of the new pollutant , and input into the PLANTX crop absorption simulation model based on cascade perspective; For each crop type involved in the recycled water irrigation area, the PLANTX crop absorption simulation model based on the cascade perspective is run one by one to output the accumulation concentration of new pollutants in the edible parts of the crops. ,in, Indicates the type of crop; According to the specific crop types, the crop yield per unit area data collected from the agronomic information data of the recycled water irrigation area is called , calculate the mass of new pollutants accumulated per unit area of ​​land when crops are irrigated with recycled water : ； Collect toxic effect data of new pollutants, including effect factors based on midpoint levels and damage factors based on endpoint levels, the midpoint effect factors include carcinogenic effect factors and non-carcinogenic effectors The damage factors based on the endpoint level include carcinogenic damage factors and non-carcinogenic damaging factors ; According to the types of new pollutants, the constructed new pollutant toxicity effect data set is called to calculate the health risks caused by the carcinogenic toxicity effects. Health risks from non-carcinogenic toxic effects : ； ； A linear superposition model was used to preliminarily simulate the use of recycled water to irrigate the same crops per unit area of ​​land, and to calculate the health risks caused by the accumulation of multiple new pollutants in edible parts. : 。 4. The method for generating a multi-objective optimization strategy for reclaimed water irrigation according to claim 3, characterized in that: The efficiency dataset of crop absorption of nitrogen and phosphorus nutrition in recycled water and traditional synthetic fertilizers is constructed, and according to the total nitrogen concentration in the recycled water and the total phosphorus concentration in the recycled water, the amount of traditional nitrogen fertilizer and the amount of traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrition resources in the recycled water are calculated, and the amount of traditional nitrogen fertilizer and the amount of traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrition resources in the recycled water are collected when the crops are irrigated without recycled water. Combined with the amount of traditional nitrogen fertilizer and the amount of traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrition resources in the recycled water, the amount of traditional synthetic fertilizer that is additionally required for crops when irrigated with recycled water is calculated, specifically including: Construct a dataset of crop nitrogen and phosphorus nutrient utilization, including data on the efficiency of crop absorption of nitrogen nutrients from recycled water , data on the efficiency of crop absorption of phosphorus nutrients from recycled water , data on the efficiency of crops absorbing nitrogen nutrients from traditional fertilizers , data on the efficiency of crops absorbing nitrogen and phosphorus nutrients from traditional fertilizers , and conventional nitrogen fertilizer use when crops are not irrigated with recycled water and conventional phosphate fertilizer use when crops are not irrigated with recycled water ; The total nitrogen concentration in the recycled water is called , the total phosphorus concentration in the reclaimed water , the crop irrigation water intensity data in the agronomic information data of the recycled water irrigation area , data on the efficiency of the crops in absorbing nitrogen nutrients from recycled water and data on the efficiency of the crop in absorbing phosphorus nutrients from recycled water , calculate the amount of nitrogen resources recovered per unit area of ​​land by using recycled water to irrigate crops and phosphorus resources : ； ； According to nitrogen resources and phosphorus resources , using data on the efficiency of the crop in absorbing nitrogen nutrients from traditional fertilizers and data on the efficiency of the crops in absorbing nitrogen and phosphorus nutrients from traditional fertilizers , calculate the amount of traditional nitrogen fertilizer that can be replaced by using recycled water to irrigate crops per unit area of ​​land and traditional phosphate fertilizer usage : ； ； in, and They represent the effective mass proportion of nitrogen nutrients in traditional nitrogen fertilizers and the effective mass proportion of phosphorus nutrients in traditional phosphorus fertilizers respectively; Based on the traditional nitrogen fertilizer application when crops are not irrigated with recycled water , Traditional phosphate fertilizer usage for crops not irrigated with recycled water , the amount of traditional nitrogen fertilizer that can be replaced by using recycled water to irrigate crops per unit area of ​​land and traditional phosphate fertilizer usage , calculate the additional amount of traditional nitrogen fertilizer required for crops per unit area of ​​land when irrigated with recycled water and traditional phosphate fertilizer usage : ； ； The additional amount of traditional nitrogen fertilizer required for crops per unit area of ​​land when irrigated with recycled water and traditional phosphate fertilizer usage Add up and get the additional amount of traditional synthetic fertilizers : 。 5. The method for generating a multi-objective optimization strategy for reclaimed water irrigation according to claim 4, characterized in that: According to the total nitrogen concentration in the reclaimed water, the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water under the action of soil microorganisms is calculated, and according to the additional amount of traditional nitrogen fertilizer, the nitrous oxide emitted by direct and indirect conversion of nitrogen in traditional nitrogen fertilizers under the action of soil microorganisms is calculated, and the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water is added to obtain the nitrous oxide emission from the use of reclaimed water for irrigation, which specifically includes: According to the total nitrogen concentration in the reclaimed water and the crop irrigation water intensity data Calculate the nitrous oxide emissions generated by the conversion of nitrogen in the soil microorganisms when reclaimed water is used for irrigation per unit area of ​​land. : ； in, and are emission factors used to describe direct and indirect emission pathways, respectively, It represents the proportion of volatile nitrogen in recycled water; The additional amount of traditional nitrogen fertilizer required for crops per unit area of ​​land when irrigated with recycled water Calculate the nitrous oxide emissions generated by the conversion of additional nitrogen in traditional nitrogen fertilizers used for irrigation with recycled water per unit area of ​​land under the action of soil microorganisms : ； in, It represents the proportion of volatile nitrogen in traditional nitrogen fertilizer; Calculation of nitrous oxide emissions per unit area of ​​land when irrigated with recycled water : 。 6. The method for generating a multi-objective optimization strategy for reclaimed water irrigation according to claim 5, characterized in that: The above-mentioned method constructs a reclaimed water directional irrigation strategy based on multi-objective collaborative optimization based on the health risks caused by exposure of new pollutants to the human food web, the additional amount of traditional synthetic fertilizers required for crops when using reclaimed water for irrigation, and the nitrous oxide emissions from reclaimed water irrigation, specifically including: Health risks posed by exposure of new contaminants to the human food web , the additional amount of traditional synthetic fertilizers required for crops when irrigated with recycled water and nitrous oxide emissions from recycled water irrigation , with the irrigation area of ​​a specific crop as the decision variable , construct a functional expression of a single optimization objective: ； ； ； in, Indicates the health risks of using recycled water to irrigate crops in the study area, It indicates the amount of additional traditional fertilizers needed when using recycled water to irrigate crops in the study area. represents the nitrous oxide emissions generated when recycled water is used to irrigate crops in the study area; Call the crop irrigation water intensity data , combined with the amount of recycled water , construct the functional expression of water quantity constraint: ； Call the crop planting area data in the agronomic information data of the recycled water irrigation area , considering that the area of ​​each crop irrigated with recycled water should not be larger than the original planting area of ​​the crop, the functional expression of the land constraint is constructed: ； The decision variable , integrate the function of a single optimization objective, water constraints and land constraints, and calculate the objective function value when a single objective is optimal for each objective function ,in, Indicates the specific optimization goal; The directional irrigation strategy of recycled water with average water distribution for irrigation of crops as the benchmark is used to calculate the irrigation area of ​​each crop under the benchmark situation. : ； in, Indicates the number of crop types involved in the area of ​​recycled water irrigation; according to Calculate the objective function value of each optimization target under the benchmark condition ; Construct the objective function of multi-objective collaborative optimization: ； in, Represents the overall satisfaction of multiple objectives, Indicates satisfaction with a single goal: ； in, , and They represent the objective function values ​​of the optimization objectives in the benchmark situation, in the multi-objective collaborative optimization process, and when a single objective is optimal; According to the objective function of multi-objective collaborative optimization, the maximum overall satisfaction value is obtained. Combination, denoted as , Represents a multi-objective collaborative optimization strategy for reclaimed water directional irrigation.

7. The method for generating a multi-objective optimization strategy for reclaimed water irrigation according to claim 1 or 6, characterized in that: The method constructs a reclaimed water directional irrigation strategy based on multi-objective collaborative optimization based on the health risks of new pollutants exposed to the human food web, the additional amount of traditional synthetic fertilizers required for crops when irrigated with reclaimed water, and the nitrous oxide emissions from reclaimed water irrigation, and then includes: Based on the reclaimed water directional irrigation strategy, the Internet of Things technology is used to call a remote controller to automatically control the irrigation equipment to implement the reclaimed water directional irrigation strategy.

8. A system for generating a multi-objective optimization strategy for recycled water irrigation, characterized in that: The generation system of the multi-objective optimization strategy for recycled water irrigation includes: A data set construction module is used to construct a recycled water quantity and quality data set, wherein the recycled water quantity and quality data set includes the recycled water quantity, the total nitrogen concentration in the recycled water, the total phosphorus concentration in the recycled water, the types of new pollutants, and the concentrations of new pollutants; A health risk assessment module, for collecting toxic effect data of new pollutants based on the recycled water quantity and quality data set and the PLANTX crop absorption simulation model based on a cascade perspective, and simulating the health risks of new pollutants exposed to the human food web; The additional dosage calculation module is used to construct an efficiency data set of crop absorption of nitrogen and phosphorus nutrients in recycled water and traditional synthetic fertilizers, calculate the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the recycled water according to the total nitrogen concentration and the total phosphorus concentration in the recycled water, collect the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer used by crops when recycled water is not used for irrigation, and calculate the additional amount of traditional synthetic fertilizer required by crops when recycled water is used for irrigation based on the amount of traditional nitrogen fertilizer and traditional phosphorus fertilizer that can be replaced by nitrogen and phosphorus nutrient resources in the recycled water; An emission calculation module is used to calculate the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water under the action of soil microorganisms according to the total nitrogen concentration in the reclaimed water, calculate the nitrous oxide emitted by direct and indirect conversion of nitrogen in traditional nitrogen fertilizers under the action of soil microorganisms according to the additional amount of traditional nitrogen fertilizers, and add the nitrous oxide emitted by direct and indirect conversion of nitrogen in the reclaimed water to obtain the nitrous oxide emission of reclaimed water irrigation; The irrigation strategy optimization module is used to construct a reclaimed water directional irrigation strategy based on multi-objective collaborative optimization according to the health risks caused by exposure of new pollutants to the human food web, the additional amount of traditional synthetic fertilizers required for crops when irrigated with reclaimed water, and the nitrous oxide emissions from reclaimed water irrigation.

9. A terminal, characterized in that: The terminal includes: a memory, a processor, and a program for generating a multi-objective optimization strategy for reclaimed water irrigation stored in the memory and executable on the processor. When the program for generating a multi-objective optimization strategy for reclaimed water irrigation is executed by the processor, the steps of the method for generating a multi-objective optimization strategy for reclaimed water irrigation as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program for generating a multi-objective optimization strategy for reclaimed water irrigation. When the program for generating a multi-objective optimization strategy for reclaimed water irrigation is executed by a processor, the steps of the method for generating a multi-objective optimization strategy for reclaimed water irrigation as described in any one of claims 1 to 7 are implemented.

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