CN118125582B - Sewage treatment method - Google Patents

Abstract

The application provides a sewage treatment method, which is applied to the technical field of sewage treatment and comprises the following steps: treating sewage with a first sewage treatment reagent according to a first treatment regime comprising: treating sewage by using the first sewage treatment reagent to obtain treated sewage; irrigating target soil with the treated sewage at a first frequency, the heavy metal content in the target soil being below a first threshold; detecting the heavy metal content in target soil after irrigation for a first period of time to obtain a first detection result; according to the first detection result, obtaining a first sewage treatment performance of the first sewage treatment reagent for sewage treatment according to the first treatment mode; and when the first sewage treatment property meets the treatment requirement for the target sewage, treating the target sewage by using the first sewage treatment reagent.

Description

Sewage treatment method

Technical Field

The application relates to the technical field of sewage treatment, in particular to a sewage treatment method.

Background

With the increasing attention paid to pollution control and the development of sewage treatment technology, the sewage treatment technology is gradually mature, and the sewage treatment technology is gradually diversified. In order to improve the sewage treatment effect, various treatment modes are often combined, for example, chemical treatment and phytoremediation are combined, firstly, sewage is subjected to chemical treatment by utilizing a sewage treatment reagent to remove pollutants such as heavy metal ions in the sewage, then, a phytoremediation technology is adopted, and the metabolic activity of plants and rhizosphere microorganisms thereof is utilized to further absorb, accumulate or degrade the residual pollutants in the converted sewage, so that the aim of improving the sewage treatment efficiency is fulfilled.

However, the sewage treatment method has complex and diverse flow processes, and once an unsuitable sewage treatment reagent is selected, the overall sewage treatment effect of the system may be affected, and the ideal effect is difficult to achieve. Therefore, it is highly desirable to provide a sewage treatment method to improve the sewage treatment effect.

Disclosure of Invention

In view of the above, embodiments of the present application provide a sewage treatment method to overcome or at least partially solve the above problems.

In a first aspect of an embodiment of the present application, there is provided a sewage treatment method, including:

treating sewage with a first sewage treatment reagent according to a first treatment regime comprising:

treating sewage by using the first sewage treatment reagent to obtain treated sewage;

Irrigating target soil with the treated sewage at a first frequency, the heavy metal content in the target soil being below a first threshold;

Detecting the heavy metal content in target soil after irrigation for a first period of time to obtain a first detection result;

According to the first detection result, obtaining a first sewage treatment performance of the first sewage treatment reagent for sewage treatment according to the first treatment mode;

and when the first sewage treatment performance meets the treatment requirement for the target sewage, treating the target sewage by using the first sewage treatment reagent.

The second aspect of the embodiment of the application also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory, wherein the processor executes the computer program to realize the steps in the sewage treatment method according to the first aspect of the embodiment of the application.

The third aspect of the embodiment of the present application also provides a computer readable storage medium having stored thereon a computer program/instruction which when executed by a processor implements the steps of the sewage treatment method according to the first aspect of the embodiment of the present application.

A fourth aspect of the embodiments of the present application also provides a computer program product which, when run on an electronic device, causes a processor to carry out the steps of the sewage treatment method according to the first aspect of the embodiments of the present application.

The embodiment of the application provides a sewage treatment method, which comprises the following steps: treating sewage with a first sewage treatment reagent according to a first treatment regime comprising: treating sewage by using the first sewage treatment reagent to obtain treated sewage; irrigating target soil with the treated sewage at a first frequency, the heavy metal content in the target soil being below a first threshold; detecting the heavy metal content in target soil after irrigation for a first period of time to obtain a first detection result; according to the first detection result, obtaining a first sewage treatment performance of the first sewage treatment reagent for sewage treatment according to the first treatment mode; and when the first sewage treatment performance meets the treatment requirement for the target sewage, treating the target sewage by using the first sewage treatment reagent. According to the embodiment of the application, the sewage is treated by using the first sewage treatment reagent, then the influence effect of the treated sewage on soil is used as a reference factor, the change condition of the heavy metal content (namely the first detection result) of the target soil before and after irrigation is used for evaluating the performance of the first sewage treatment reagent, and when the first sewage treatment performance can meet the treatment requirement of the target sewage, the target sewage is treated by using the first sewage treatment reagent according to the first treatment mode. Thus, the treatment effect of the whole sewage treatment system is utilized to determine the first sewage treatment performance, which is favorable for determining the optimal treatment mode and the optimal treatment reagent aiming at target sewage so as to improve the sewage treatment effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments of the present application will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of steps of a sewage treatment method according to an embodiment of the present application;

Fig. 2 is a schematic diagram of an electronic device according to an embodiment of the present application.

Detailed Description

Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

The embodiment of the application provides a sewage treatment method for improving the sewage treatment effect. The sewage treatment method provided by the embodiment of the application is described in detail below through some embodiments and application scenes thereof with reference to the accompanying drawings.

Embodiment one,

An embodiment of the present application provides a sewage treatment method, referring to fig. 1, and fig. 1 is a step flowchart of the sewage treatment method provided in the embodiment of the present application, as shown in fig. 1, where the method includes:

Step S101, sewage is treated by a first sewage treatment reagent according to a first treatment method. The first processing mode comprises the following steps:

And step S1011, treating the sewage by using the first sewage treatment reagent to obtain treated sewage.

Specifically, the first sewage treatment reagent and sewage are mixed and stirred, and after a period of time (which may be a preset period of time) is fully reacted, the treated sewage is obtained. In the embodiment of the application, the sewage at least comprises heavy metal pollutants, and the heavy metal pollutants can be one or more of heavy metal ions such as copper, zinc, chromium, cadmium, nickel, lead and the like. In addition, the sewage can comprise organic pollutants, nutrient pollutants such as nitrogen, phosphorus and the like, acid-base pollutants, solid pollutants and the like. Before the sewage is treated by the first sewage treatment reagent, the sewage can be subjected to operations such as standing, filtering and the like, so that solid impurities in the sewage can be filtered; after the sewage is treated by the first sewage treatment reagent, the sewage is stood and filtered to remove sediment generated after the reaction of the first sewage treatment reagent and heavy metal ions in the sewage.

Step S1012, irrigating target soil with the treated sewage at a first frequency, wherein the heavy metal content in the target soil is lower than a first threshold value.

In the related art, after chemical treatment of sewage, the treated sewage may be recycled, for example, the treated sewage is used for irrigating soil, reducing salt in the soil, and improving soil fertility by using organic pollutants, nitrogen, phosphorus elements, and the like in the sewage. However, in general, when the sewage treatment reagent (first sewage treatment reagent) is applied to sewage treatment, only the effect of purifying sewage is considered, and the influence of the reagent on the subsequent application is not considered. For example, small amounts of heavy metal ions and other contaminants may remain in the treated wastewater, which may cause elevated heavy metal levels in the soil, or other problems, to irrigate the soil with the treated wastewater. In this embodiment, after sewage is treated (heavy metal ions are removed therefrom) with the sewage treatment agent, the target soil is irrigated with the treated sewage at a first frequency. Before this step S1012 is performed, the heavy metal content in the target soil may be determined in advance, and a first frequency (including the volume of treated sewage irrigated in the target soil of a unit area per unit time, for example, 1L of treated sewage irrigated to the target soil of an area of 1 square meter per 1 hour interval) may be set to facilitate the subsequent comparative quantitative analysis of the irrigated target soil. In addition, in order to avoid that the heavy metal content of the target soil is too high before irrigation, so that the heavy metal content is less changed after the irrigation treatment of the sewage, and the analysis condition is difficult to observe, the soil with the heavy metal content lower than the first threshold value needs to be selected as the target soil.

Step S1013, detecting the heavy metal content in the target soil after irrigation for a first period of time to obtain a first detection result.

Specifically, the duration of irrigation may be preset to be a fixed first duration, and after the treated sewage is utilized to irrigate the target soil to reach the first duration, the heavy metal content in the target soil is detected, and the obtained first detection result at least includes: heavy metal content in the target soil. Specifically, samples with different depths and different positions in the target soil can be taken for detection, or the target soil is fully stirred and mixed and then sampled for heavy metal content detection. In the embodiment of the application, a specific method for detecting the heavy metal content of the target soil is not limited.

Step S102, obtaining a first sewage treatment performance of the first sewage treatment reagent for performing sewage treatment according to the first treatment mode according to the first detection result.

Specifically, the heavy metal content in the first detection result is compared with the heavy metal content of the target soil in the initial state (namely, the heavy metal content in the soil before the target soil is irrigated by the treated sewage), so that the heavy metal content in the target soil is changed after the sewage is irrigated. If the first detection result shows that the heavy metal content in the target soil is increased or is higher than a preset heavy metal content qualification threshold value, the heavy metal content in the treated sewage is higher, and the sewage treatment effect of the first sewage treatment reagent is poorer; if the first detection result shows that the heavy metal content in the target soil is reduced, the first sewage treatment reagent has ideal sewage treatment effect, and residual heavy metal ions in the treated sewage are less, so that the heavy metal ion in the soil can be further diluted and the heavy metal content can be reduced.

And step S103, when the first sewage treatment performance meets the treatment requirement for the target sewage, treating the target sewage by using the first sewage treatment reagent.

Specifically, the first sewage treatment performance represents the sewage treatment performance of the first sewage treatment reagent in the first treatment mode, and is the performance evaluation result of the first sewage treatment reagent from the point of view of the overall treatment effect of the sewage treatment system. The target sewage at least comprises heavy metal pollutants, and the heavy metal pollutants can be one or more of heavy metal ions such as copper, zinc, chromium, cadmium, nickel, lead and the like. Thus, for the target sewage to be treated, the treatment requirement for the target sewage is determined (for example, the content of heavy metal elements in the target sewage needs to be reduced to a first threshold value), and whether the target sewage can be treated with the first sewage treatment reagent is determined according to the first sewage treatment performance, and when the reagent meets the treatment requirement of the target sewage, the target sewage is treated with the first sewage treatment reagent according to the first treatment mode (steps S1011-S1013). Therefore, the treatment effect of the whole sewage treatment system is utilized to determine the first sewage treatment performance, so that the optimal treatment mode and the optimal treatment reagent aiming at target sewage can be determined, and the sewage treatment effect can be improved.

In addition, when the step S1013 is executed to detect the target soil, the saline-alkali content, the nutritional status (the content of elements such as nitrogen and phosphorus) and the like of the target soil may be detected, and the corresponding first detection result may further include: the change condition of the saline-alkali degree of the target soil before and after irrigation, and the change condition of elements such as nitrogen, phosphorus and the like. Therefore, whether the treated sewage irrigates soil or not can cause other influences on the soil can be judged according to the first detection result, and further whether the treated sewage is used for irrigating the soil or not can influence the subsequent application of the soil (for example, the soil is used for planting plants) can be judged. The embodiment of the application not only evaluates the first sewage treatment reagent from the aspect of chemical treatment, namely tests the treatment effect of the first sewage treatment reagent on sewage, but also considers the influence of the treated sewage on soil when the treated sewage is recycled (used for irrigating the soil). Because the treated sewage obtained by treatment with different sewage treatment reagents has different compositions, the effect is different in the subsequent application, namely, the state of the soil after irrigation is different. According to the embodiment of the application, through the steps S101-S102, the influence effect (namely the first detection result) of the treated sewage on the soil is taken as a reference factor, so that the overall performance evaluation of the first sewage treatment reagent is realized, and the overall sewage treatment effect is improved.

The sewage treatment process often combines a plurality of treatment modes, and besides the mode of using the sewage after chemical treatment for irrigating soil, the mode of chemical treatment of sewage can be combined with a phytoremediation mode, namely, firstly, sewage is subjected to chemical treatment by utilizing a sewage treatment reagent to remove pollutants such as heavy metal ions and the like, and then, the residual pollutants in the converted sewage are further absorbed, accumulated or degraded by utilizing the metabolic activity of plants and rhizosphere microorganisms by utilizing a phytoremediation technology, so that the aim of improving the sewage treatment efficiency is fulfilled. However, for such a combined wastewater treatment system, the lack of accurate performance assessment of the wastewater treatment reagents used therein may result in the overall wastewater treatment effect of the system being compromised once an unsuitable wastewater treatment reagent is selected, and it may be difficult to achieve the desired effect (e.g., the components in the wastewater treatment reagent may inhibit plant growth).

The following examples (second and third embodiments) are described for respective sewage treatment methods for different sewage treatment methods (combination of chemical treatment of sewage and phytoremediation).

Embodiment II,

In one possible embodiment, the method further comprises:

step S201, treating the sewage with the first sewage treatment reagent according to a second treatment mode, where the second treatment mode includes:

And step S2011, treating sewage by using the first sewage treatment reagent to obtain treated sewage.

Step S2012, irrigating the target soil with the treated sewage at the first frequency.

And step S2013, detecting the heavy metal content in the target soil after irrigation for the first time period to obtain the first detection result.

The steps S2011-S2013 are the same as the steps S1011-S1013 in the first embodiment, and are not described herein.

And step S2014, planting a repair plant on the target soil.

Specifically, the repair plant can be any plant variety with soil repair function, and further can be a repair plant with absorption and accumulation functions on one or more heavy metal elements (mercury Hg, cadmium Cd, lead Pb, chromium Cr, zinc Zn, copper Cu, nickel Ni, cobalt Co, arsenic As and the like). In performing step S2014, a planting density (including the number of the repair plants planted on the target soil per unit area or a distance between every two adjacent repair plants) of the repair plants planted on the target soil may be set in advance. In this embodiment, the repair plant may be: one or more of Sedum alfredii, herba Solani Nigri, herba Centipedae, flos Impatientis and radix Bermudae.

And step S2015, detecting the heavy metal content of the target soil after the second time period is planted, and obtaining a second detection result.

Specifically, organic pollutants, nitrogen, phosphorus elements and the like in the sewage are utilized to improve soil fertility, so that plant growth can be promoted; and heavy metal pollutants in the sewage remain in the soil to inhibit plant growth. The treated sewage has complex components, and it is difficult to directly judge the influence of target soil on the growth of the repair plants and whether the absorption of the repair plants on heavy metals in the soil is affected after the treated sewage is used for irrigating the soil. The second period of time for planting the repair plant is preset, for example, 1 day, 5 days, or 10 days, and in the embodiment of the present application, the second period of time is not particularly limited.

After the prosthetic plant is planted on the target soil for a second period of time, detecting the heavy metal content in the target soil again, wherein the obtained second detection result at least comprises: heavy metal content in the target soil. Specifically, samples with different depths and different positions in the target soil can be taken for detection, or the target soil is fully stirred and mixed and then sampled for heavy metal content detection. In the embodiment of the application, a specific method for detecting the heavy metal content of the target soil is not limited.

Step S202, obtaining a second sewage treatment performance of the first sewage treatment reagent for sewage treatment according to the second treatment mode according to the first detection result and the second detection result.

And step S203, when the second sewage treatment performance meets the treatment requirement for the target sewage, the target sewage is treated by using the first sewage treatment reagent.

Specifically, the second sewage treatment performance represents the sewage treatment performance of the first sewage treatment reagent in the second treatment mode, and is the performance evaluation result of the first sewage treatment reagent from the point of view of the overall treatment effect of the sewage treatment system. Thus, for the target sewage to be treated, the treatment requirement for the target sewage is determined (for example, the content of heavy metal elements in the target sewage needs to be reduced to a first threshold value), whether the target sewage can be treated by the first sewage treatment reagent is determined according to the second sewage treatment performance, and when the reagent meets the treatment requirement of the target sewage, the target sewage is treated by the first sewage treatment reagent according to the second treatment mode (step S2011-S2015). Therefore, the treatment effect of the whole sewage treatment system is utilized to determine the second sewage treatment performance, so that the optimal treatment mode and the optimal treatment reagent aiming at target sewage can be determined, and the sewage treatment effect can be improved.

Specifically, a difference between the heavy metal content (heavy metal content before planting the prosthetic plant) in the first detection result and the heavy metal content (heavy metal content after planting the prosthetic plant) in the second detection result may be calculated, so as to obtain a change in the heavy metal content in the target soil after planting the prosthetic plant. If the difference value of the two results shows that the heavy metal content in the target soil is not obviously reduced and the reduction does not reach the preset restoration qualification threshold, the target soil irrigated by the treated sewage has an inhibition effect on the growth of restored plants or has an inhibition effect on the restoration effect of the restored plants, namely the overall treatment effect of the first sewage treatment reagent is poor; the difference value of the two shows that the heavy metal content in the target soil is reduced, and the reduction reaches the preset restoration qualification threshold, the target soil irrigated by the treated sewage has no influence on the restoration effect of restored plants, or has a promotion effect, and the first sewage treatment reagent has ideal sewage treatment effect. The first sewage treatment reagent can be used for realizing the combination of chemical treatment sewage and phytoremediation, is beneficial to recycling the treated sewage, and further reduces the heavy metal content in the soil.

Third embodiment (III),

In one possible embodiment, the method further comprises:

Step S301, treating the sewage with the first sewage treatment reagent according to a third treatment mode, where the third treatment mode includes:

And step S3011, treating sewage by using the first sewage treatment reagent to obtain treated sewage. Step S3011 is the same as step S1011 in the first embodiment, and will not be described here.

And step S3012, detecting the heavy metal content of the treated sewage to obtain the initial heavy metal content. The initial heavy metal content represents the content of heavy metal remained in sewage after the sewage is treated by the sewage treatment reagent.

And step S3013, planting aquatic restoration plants in the treated sewage. Specifically, the aquatic restoration plant can be any plant variety with soil restoration effect, and further can be an aquatic plant with absorption and accumulation effects on one or more heavy metal elements (mercury Hg, cadmium Cd, lead Pb, chromium Cr, zinc Zn, copper Cu, nickel Ni, cobalt Co, arsenic As and the like). In performing step S3013, a planting density (including the number of aquatic prosthetic plants planted per unit volume of treated wastewater, or a distance between every two adjacent aquatic prosthetic plants) at which prosthetic plants are planted in the treated wastewater may be set in advance. In this embodiment, the repair plant may be: one or more of water drum, feather grass, herba Menthae, herba Eichhorniae, canna, caulis Zizaniae Caduciflorae, and herba Alii Fistulosi.

And step S3014, detecting the heavy metal content of the treated sewage after the third time period is planted, and obtaining the repaired second heavy metal content. Specifically, organic pollutants, nitrogen, phosphorus elements and the like in the sewage are utilized to promote plant growth; heavy metal pollutants in sewage can inhibit plant growth, so that the components in the treated sewage are complex, and the influence on the growth of plants and the absorption of the plants to heavy metal elements can not be influenced after the treated sewage is used for planting aquatic repair plants can not be judged directly. The third period of time for planting the aquatic prosthetic plant is preset, for example, 1 day, 5 days, or 10 days, and in the embodiment of the present application, the third period of time is not particularly limited.

And step S3015, obtaining a third detection result according to the difference between the initial heavy metal content and the repaired second heavy metal content. Specifically, after the aquatic restoration plants are planted in the treated sewage for a third period of time, detecting the heavy metal content in the treated sewage again to obtain a restored second heavy metal content, and then taking the difference between the initial heavy metal content (the heavy metal content before the aquatic restoration plants are planted) and the restored second heavy metal content (the heavy metal content after the aquatic restoration plants are planted) as a third detection result.

Step S302, obtaining a third sewage treatment performance of the sewage treatment reagent for performing sewage treatment according to the third treatment mode according to the third detection result.

And step S303, when the third sewage treatment performance meets the treatment requirement for the target sewage, the target sewage is treated by using the first sewage treatment reagent.

Specifically, the third sewage treatment performance represents the sewage treatment performance of the first sewage treatment reagent in the third treatment mode, and is the performance evaluation result of the first sewage treatment reagent from the point of view of the overall treatment effect of the sewage treatment system. Thus, for the target sewage to be treated, the treatment requirement for the target sewage is determined first, and then, according to the third sewage treatment performance, whether the treatment with the first sewage treatment reagent is possible is judged, and under the condition that the reagent meets the treatment requirement for the target sewage, the target sewage is treated by adopting the first sewage treatment reagent according to the third treatment mode (step S3011-S3014). Therefore, the treatment effect of the whole sewage treatment system is utilized to determine the third sewage treatment performance, which is beneficial to determining the optimal treatment mode and the optimal treatment reagent aiming at target sewage so as to improve the sewage treatment effect.

Specifically, according to the third detection result, it is known that the heavy metal content in the treated sewage changes after the aquatic prosthetic plant is planted. If the heavy metal content in the treated sewage is not obviously reduced or the reduction does not reach the preset restoration qualification threshold, the treated sewage has an inhibition effect on the growth of aquatic restoration plants or has an inhibition effect on the restoration effect of the aquatic restoration plants, namely the overall treatment effect of the first sewage treatment reagent is poor; if the heavy metal content in the treated sewage is reduced and the reduction reaches the preset restoration qualification threshold, the effect of restoring the aquatic restoration plants by the treated sewage is not influenced, or the effect of promoting is realized, and the effect of the first sewage treatment reagent on the sewage is ideal. The first sewage treatment reagent can be used for realizing the combination of chemical treatment sewage and aquatic plant restoration, is beneficial to recycling the treated sewage and further degrading the sewage.

In one possible embodiment, the method further comprises:

And step S401, determining the sewage treatment capacity of the first treatment mode according to the first sewage treatment performance, wherein the sewage treatment capacity represents the maximum sewage treatment volume and the maximum heavy metal content which can be treated. Specifically, after step S102 is performed, the first sewage treatment performance to be obtained is known as the amount of sewage treatment (maximum sewage treatment volume and maximum heavy metal content) that can be treated for a certain amount of the first sewage treatment agent according to the treatment method of the first embodiment.

Step S402, determining the sewage treatment capacity of the second treatment mode according to the second sewage treatment performance; specifically, after step S202 is performed, the second sewage treatment performance to be obtained is known as the amount of sewage treatment (maximum sewage treatment volume and maximum heavy metal content) that can be treated according to the treatment method of the second embodiment for a certain amount of the first sewage treatment reagent.

Step S403, determining the sewage treatment capacity of the third treatment mode according to the third sewage treatment performance; specifically, after step S302 is performed, the third sewage treatment performance to be obtained is known as the amount of sewage treatment (maximum sewage treatment volume and maximum heavy metal content) that can be treated according to the treatment method of the third embodiment for a certain amount of the first sewage treatment reagent.

And step S404, obtaining the volume and heavy metal content of the target sewage.

Step S405, selecting a sewage treatment mode according to the volume and the heavy metal content of the target sewage, where the sewage treatment mode at least includes: the first processing mode, the second processing mode, and the third processing mode.

Specifically, the first, second and third embodiments show different sewage treatment methods, and the cost and the amount of sewage that can be treated are different for different sewage treatment methods. For example, in the second embodiment, compared with the first embodiment, after the soil is irrigated by the treated sewage, the heavy metal remaining in the soil is further absorbed by the planted and repaired plant, and the cost of the second embodiment is higher than that of the first embodiment, but the treatment capacity of the treated sewage (i.e., the heavy metal content in the treated sewage) is higher. Therefore, in the practical application, the proper sewage treatment mode can be selected according to the current sewage quantity (volume) required to be treated and the heavy metal content in the sewage.

In one possible embodiment, the method further comprises:

Step S501, increasing the input amount of the first sewage treatment reagent according to a target gradient, and treating the target sewage according to the first treatment mode for each input amount to obtain a first relationship curve between the input amount of the first sewage treatment reagent and the sewage treatment effect. Specifically, in the first embodiment, when step S101 is performed (the sewage is treated by the first sewage treatment reagent in the first treatment mode), the amount of the first sewage treatment reagent to be used is increased according to the target gradient, for example, the first sewage treatment reagent is divided into 10 groups, and the amount of the first sewage treatment reagent to be used is set to 1L, 2L, and 3L … … L for each cubic meter of the target sewage. Thus, for each group of sewage treatment reagents, the step S101 is performed to obtain a first detection result of a plurality of groups of sewage treatment reagents, and then the step S102 is performed to determine a first sewage treatment performance based on the plurality of first detection results, thereby generating a first relation curve between the input amount of the sewage treatment reagents and the sewage treatment effect. In particular. From the first relationship, it can be understood that the first embodiment is the optimal amount or the optimal amount interval when the first sewage treatment reagent is used.

Step S502, increasing the input amount of the first sewage treatment reagent according to the target gradient, and treating the target sewage according to the second treatment mode for each input amount to obtain a second relationship curve between the input amount of the sewage treatment reagent and the sewage treatment effect.

Specifically, in the second embodiment, when step S201 is performed (the sewage is treated by the first sewage treatment reagent according to the second treatment method), the amount of the first sewage treatment reagent to be used is increased according to the target gradient, for example, the first sewage treatment reagent is divided into 10 groups, and the amount of the first sewage treatment reagent to be used is set to 1L, 2L, and 3L … … L for each cubic meter of the target sewage. Thus, for each group of first sewage treatment reagents, step S201 is performed to obtain a first detection result and a second detection result of a plurality of groups of first sewage treatment reagents, then step S202 is performed to determine second sewage treatment performance based on the plurality of first detection results and the plurality of second detection results, and further a second relation curve between the input amount of the sewage treatment reagents and the sewage treatment effect is generated. In particular. From the second relationship, it is understood that the optimal amount or the optimal amount interval is obtained when the first sewage treatment reagent is used in the second embodiment.

Step S503, increasing the input amount of the first sewage treatment reagent according to the target gradient, and treating the target sewage according to the third treatment mode for each input amount, so as to obtain a third relationship curve between the input amount of the sewage treatment reagent and the sewage treatment effect.

Specifically, in the third embodiment, when step S301 is performed (the target sewage is treated by the first sewage treatment reagent in the third treatment method), the amount of the first sewage treatment reagent to be used is increased in accordance with the target gradient, for example, the sewage treatment reagent is divided into 10 groups, and the amount of the target sewage per cubic meter is set to 1L, 2L, 3L … … L, respectively. Thus, for each group of first sewage treatment reagents, step S301 is performed to obtain a first detection result and a second detection result of a plurality of groups of first sewage treatment reagents, then step S202 is performed to obtain a plurality of third detection results (differences between the initial heavy metal content and the plurality of repaired second heavy metal contents respectively), and a third sewage treatment performance is determined, so as to generate a third relation curve between the input amount of the sewage treatment reagents and the sewage treatment effect. In particular. From the third relationship, it is understood that the optimal amount or the optimal amount interval is obtained when the first sewage treatment reagent is used in the third embodiment.

Step S504, determining a common interval according to the slope change conditions of the first relation curve, the second relation curve and the third relation curve; the common interval represents: the slopes of the first relation curve, the second relation curve and the third relation curve are simultaneously smaller than a put-in value range of a preset threshold value.

Step S505, determining the input amount corresponding to the common interval as an optimal input amount interval of the first sewage treatment reagent.

For a certain amount of sewage, the more the first sewage treatment reagent is added, the lower the heavy metal content in the sewage, but the excessive first sewage treatment reagent can remain in the sewage, and the influence on the recovery and application of the subsequent sewage is caused. Therefore, in practical use, it is necessary to determine not only the performance of the first sewage treatment reagent but also the amount of the first sewage treatment reagent to be used (the amount to be put in). Specifically, when the common section is determined according to the relationship curve, the determination may be performed according to the slope of the relationship curve. For the first relationship curve, the second relationship curve and the third relationship curve obtained in steps S401-S403, the horizontal axis is the input amount, the vertical axis is the sewage treatment effect, in the initial stage, the sewage treatment effect increases with the increase of the input amount, the slope of the relationship curve gradually decreases, and after the input amount is saturated, the sewage treatment effect does not increase or even gradually decreases with the increase of the input amount. Therefore, for the first, second, and third relationship curves, a delivery amount value range (a value range in which the delivery amount tends to be saturated) when the slope is smaller than the preset threshold (and the slope is not smaller than 0) among the three curves is taken as the optimal delivery amount section. When the first sewage treatment reagent is evaluated, the optimal input amount or the optimal input amount interval of the first sewage treatment reagent in application is determined. For different sewage treatment modes (a first treatment mode, a second treatment mode and a third treatment mode), the corresponding optimal sewage treatment reagent feeding amount can be selected. On one hand, the use amount of sewage treatment reagent can be saved, and the cost is reduced; on the other hand, the improper use amount of the sewage treatment reagent can be avoided, and the overall sewage treatment effect is adversely affected.

In one possible embodiment, the method further comprises:

step S601, wherein the target soil is a plurality of different types of soil, and at least includes: red soil, brown soil and black soil; the method for detecting the heavy metal content in the target soil after irrigation for the first time length, to obtain a first detection result, comprises the following steps: and respectively detecting the heavy metal content in the soil of different types, and determining the average value of the detected heavy metal content as the first detection result.

Specifically, in the first embodiment, when step S101 is performed (after sewage is treated with the first sewage treatment reagent, target soil is irrigated with the treated sewage), the target soil to be used is divided into a plurality of groups according to the kind of soil, for example, the target soil is divided into 3 groups, including: red soil, brown soil and black soil. Therefore, when step S1012 is performed for each group, the treated sewage is utilized to irrigate the target soil of each group at the first frequency, after the first time is reached, the heavy metal content in the soil of the group is detected, the obtained values of the heavy metal contents are averaged to be used as the first detection result, so that the influence caused by the difference between different types of soil is reduced, the accuracy of the subsequent evaluation of the first sewage treatment reagent is improved, and the sewage treatment effect is further improved.

Step S602, wherein the repair plant is a plurality of different types of repair plants, and at least includes: sedum alfredii, impatiens balsamina and bermuda grass; the heavy metal content detection is carried out on the target soil after the second time period of planting to obtain a second detection result, and the method comprises the following steps: and respectively carrying out heavy metal content detection on target soil after each repair plant is planted for the second time period, and determining the average value of the detected heavy metal content as the second detection result.

Specifically, in the second embodiment, when step S201 is performed (after sewage is treated with the first sewage treatment reagent, the target soil is irrigated with the treated sewage, and the repair plants are planted on the target soil), the repair plants used are divided into a plurality of groups according to the plant types, for example, the repair plants are divided into 3 groups, including: sedum alfredii, impatiens balsamina and bermuda grass. Therefore, when each group is executed, different types of repair plants are planted on the target soil respectively in the steps S2014-S2015, after the second time period is reached, heavy metal content detection is carried out on the target soil planted with the different plant types respectively, the obtained numerical values of the heavy metal contents are averaged to be used as a second detection result, so that the influence caused by the difference of the repair effects of the different types of repair plants is reduced, and the accuracy of the subsequent evaluation of the first sewage treatment reagent is improved.

Step S603, wherein the aquatic restoration plant is a plurality of different types of aquatic plants, and at least includes: canna, cane shoots and shallots; the heavy metal content detection is carried out on the treated sewage after the third time period is planted to obtain the repaired second heavy metal content, and the method comprises the following steps: and respectively carrying out heavy metal content detection on the treated sewage after each aquatic repair plant is planted for the third time period, and determining the average value of the detected heavy metal content as the repaired second heavy metal content.

Specifically, in the third embodiment, when step S301 is performed (after sewage is treated with the first sewage treatment reagent, aquatic repair plants are planted with the treated sewage), the aquatic repair plants used are classified into a plurality of groups according to plant types, for example, the aquatic repair plants are classified into 3 groups, including: canna, cane shoots and shallots. Thus, when each group is executed, different types of aquatic repair plants are respectively planted in the treated sewage, after the third time period is reached, heavy metal content detection is respectively carried out on the treated sewage planted with different plant types, the obtained numerical values of the heavy metal contents are averaged to be used as the repaired second heavy metal content, and further a third detection result is obtained, so that the influence caused by the difference of the repair effects of the different types of aquatic repair plants is reduced, and the accuracy of the subsequent evaluation of the first sewage treatment reagent is improved.

Step S604, determining the comprehensive sewage treatment performance of the first sewage treatment reagent according to the first detection result, the second detection result and the third detection result.

Specifically, the first detection result, the second detection result and the third detection result can be integrated, weighted summation is performed according to a certain weight proportion, and the comprehensive sewage treatment performance of the first sewage treatment reagent is obtained, and is used for representing the overall treatment effect of the first sewage treatment reagent in various sewage treatment modes.

In one possible embodiment, before the target sewage is treated with the first sewage treatment reagent, the method further comprises:

step S701, performing pretreatment on the first sewage treatment reagent to obtain a plurality of first sewage treatment reagents with different physical states, where the steps at least include: powdered sewage treatment reagent, block sewage treatment reagent, slurry sewage treatment reagent and sewage treatment reagent solution.

It is to be understood that, with respect to the first sewage treatment reagent, according to different pretreatment methods, the first sewage treatment reagent in different physical states can be obtained, and different sewage treatment methods (first treatment method, second treatment method, and third treatment method) can achieve different sewage treatment effects.

Step S702, determining an optimal pretreatment mode of the first sewage treatment reagent in the first treatment mode according to the first detection result obtained after the first sewage treatment reagent in each physical state treats the target sewage according to the first treatment mode.

Specifically, in the first embodiment, when step S101 is performed (after sewage is treated with the first sewage treatment reagent, the target soil is irrigated with the treated sewage), the sewage is divided into a plurality of groups according to different physical states of the first sewage treatment reagent, and thus, when step S101 is performed for each group, the treated sewage is obtained by treating the sewage with the first sewage treatment reagent, the target soil of each group is irrigated with the treated sewage at the first frequency, and after the first time period is reached, the heavy metal content in the soil of the group is detected, and the corresponding first detection result is obtained. And determining the optimal pretreatment mode (the pretreatment mode of the first sewage treatment reagent corresponding to the detection result with the lowest heavy metal content in the plurality of first detection results) to be selected by using the first sewage treatment reagent in the first treatment mode according to the first detection result (the detected heavy metal content) obtained by each group, so as to improve the sewage treatment performance of the first sewage treatment reagent.

Step S703, determining an optimal pretreatment mode of the sewage treatment reagent in the second treatment mode according to the second detection result obtained after the first sewage treatment reagent in each physical state treats the target sewage according to the second treatment mode.

Specifically, in the second embodiment, when step S201 is performed (after sewage is treated with the first sewage treatment reagent, the target soil is irrigated with the treated sewage, and the repair plants are planted on the target soil), the first sewage treatment reagent is divided into a plurality of groups according to different physical states, and thus, when step S201 is performed for each group, the heavy metal content in each group of soil is detected, and a corresponding second detection result is obtained. And determining the optimal pretreatment mode (the pretreatment mode of the first sewage treatment reagent corresponding to the detection result with the lowest heavy metal content in the second detection results is determined as the optimal pretreatment mode) which should be selected by using the first sewage treatment reagent in the second treatment mode according to the second detection results (the detected heavy metal content) obtained by each group, so as to improve the sewage treatment performance of the first sewage treatment reagent.

Step S704, determining an optimal pretreatment mode of the first sewage treatment reagent in the third treatment mode according to the third detection result obtained after the first sewage treatment reagent in each physical state treats the target sewage according to the third treatment mode.

Specifically, in the third embodiment, when step S301 is performed (after the sewage is treated with the first sewage treatment reagent, aquatic repair plants are planted with the treated sewage), the first sewage treatment reagent is divided into a plurality of groups according to different physical states of the first sewage treatment reagent, and thus, for each group, when step S301 is performed, the heavy metal content in the treated sewage is detected, so that the corresponding repaired second heavy metal content is obtained, and further, a third detection result is obtained. And determining the optimal pretreatment mode to be selected by using the first sewage treatment reagent in the third treatment mode according to the obtained second heavy metal content after restoration and the third detection result (the difference value of the heavy metal content before and after planting the aquatic restoration plants), so as to improve the sewage treatment performance of the sewage treatment reagent.

In one possible embodiment, the target wastewater comprises a plurality of wastewater with different heavy metal contents; the method further comprises the steps of:

step S801, determining a first optimal sewage treatment capacity of the first sewage treatment reagent in the first treatment mode according to the first detection result obtained by treating the target sewage corresponding to each heavy metal content by the first sewage treatment reagent in the first treatment mode.

Specifically, in the first embodiment, when the sewage is treated in the first treatment mode (the target sewage is treated by the first sewage treatment reagent and then the target soil is irrigated by the treated sewage), the target sewage to be used is divided into 10 groups according to different heavy metal contents, for example, the heavy metal contents are respectively 0.01mg/L, 0.02mg/L and 0.03mg/L … … 0.1.1 mg/L for each cubic meter of the target sewage. Thus, for each group of wastewater, step S101 is performed to obtain first detection results of a plurality of groups of wastewater treatment reagents, and then step S102 is performed to determine first wastewater treatment performance based on the plurality of first detection results and to determine a first optimal wastewater treatment capacity of the first wastewater treatment reagents. In particular. According to the first detection result, it can be known that when a certain amount of the first sewage treatment reagent is used, the highest heavy metal content of the sewage which can be treated can cause a great amount of heavy metal to remain in the target soil when the heavy metal content in the sewage exceeds the value, namely the heavy metal content in the first detection result is higher than the heavy metal content qualification threshold value.

Step S802, determining a second optimal sewage treatment capacity of the first sewage treatment reagent in the second treatment mode according to the second detection result obtained by treating the target sewage corresponding to each heavy metal content by the first sewage treatment reagent in the second treatment mode.

Specifically, in the second embodiment, when sewage treatment is performed in the second treatment mode (after the target sewage is treated by the first sewage treatment reagent, the target soil is irrigated by the treated sewage, and the repair plants are planted on the target soil), the target sewage to be used is divided into 10 groups according to different heavy metal contents, for example, the heavy metal contents of the target sewage per cubic meter are respectively 0.01mg/L, 0.02mg/L and 0.03mg/L … … 0.1.1 mg/L. Thus, for each set of first sewage treatment reagents, step S201 is performed to obtain a first detection result and a second detection result of a plurality of sets of first sewage treatment reagents, and then step S202 is performed to determine a second sewage treatment performance based on the plurality of first detection results and the second detection result, and to determine a second optimal sewage treatment amount of the first sewage treatment reagents. In particular. According to the first detection result and the second detection result, it can be known that when a certain amount of the first sewage treatment reagent is used, the highest heavy metal content of the target sewage can be treated, and when the heavy metal content in the target sewage exceeds the value, a great amount of heavy metal remains in the target soil, for example, the difference value between the heavy metal content in the first detection result and the heavy metal content in the second detection result does not reach the preset restoration qualification threshold. That is, the treatment performance of the first sewage treatment reagent does not meet the treatment requirement of the target sewage, and the treatment reagent is not adopted to treat the target sewage.

Step 803, determining a third optimal sewage treatment amount of the first sewage treatment reagent in the third treatment mode according to the third detection result obtained by treating the target sewage corresponding to each heavy metal content by the first sewage treatment reagent in the third treatment mode.

Specifically, in the third embodiment, when sewage treatment is performed in the third treatment mode (after the target sewage is treated with the first sewage treatment reagent, aquatic repair plants are planted in the treated sewage), the target sewage to be used is divided into 10 groups according to different heavy metal contents, for example, the heavy metal contents are respectively 0.01mg/L, 0.02mg/L and 0.03mg/L … … 0.1.1 mg/L for each cubic meter of the target sewage. Thus, for each set of first wastewater treatment reagents, step S301 is performed to obtain third detection results for a plurality of sets of first wastewater treatment reagents, and then step S302 is performed to determine third wastewater treatment performance based on the plurality of third detection results and to determine a third optimal wastewater treatment capacity for the first wastewater treatment reagents. In particular. According to the difference between the initial heavy metal content and the repaired second heavy metal content, a third detection result is obtained, and it can be known that when a certain amount of the first sewage treatment reagent is used, the highest heavy metal content of the target sewage can be treated, and when the heavy metal content in the target sewage exceeds the value, a great amount of heavy metal remains in the treated sewage, for example, the difference between the initial heavy metal content and the repaired second heavy metal content does not reach a preset repair qualification threshold.

Step S804, determining a comprehensive optimal sewage treatment capacity of the first sewage treatment reagent according to the first optimal sewage treatment capacity, the second optimal sewage treatment capacity and the third optimal sewage treatment capacity.

Specifically, when performance evaluation of the first sewage treatment reagent is performed, corresponding optimal sewage treatment capacity is determined according to different sewage treatment modes, so that comprehensive optimal sewage treatment capacity of the first sewage treatment reagent is obtained, and more comprehensive evaluation of application performance of the first sewage treatment reagent is facilitated.

The embodiment of the application also provides an electronic device, and referring to fig. 2, fig. 2 is a schematic diagram of the electronic device according to the embodiment of the application. As shown in fig. 2, the electronic device 100 includes: the sewage treatment device comprises a memory 110 and a processor 120, wherein the memory 110 is in communication connection with the processor 120 through a bus, and a computer program is stored in the memory 110 and can run on the processor 120 so as to realize the steps in the sewage treatment method disclosed by the embodiment of the application.

The embodiment of the application also provides a computer readable storage medium, on which a computer program/instruction is stored, which when executed by a processor, implements the steps in the sewage treatment method as disclosed in the embodiment of the application.

The embodiment of the application also provides a computer program product which enables a processor to realize the steps of the sewage treatment method disclosed by the embodiment of the application when the computer program product runs on electronic equipment.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus, electronic devices, and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the application.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or terminal device that comprises the element.

The foregoing has outlined a detailed description of the sewage treatment method of the present application, and specific examples have been provided herein to illustrate the principles and embodiments of the present application, the above examples being provided only to assist in the understanding of the method and core ideas thereof; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims (8)

1. A method of treating wastewater, the method comprising:

treating sewage with a first sewage treatment reagent according to a first treatment regime comprising:

treating sewage by using the first sewage treatment reagent to obtain treated sewage;

Irrigating target soil with the treated sewage at a first frequency, the heavy metal content in the target soil being below a first threshold;

Detecting the heavy metal content in target soil after irrigation for a first period of time to obtain a first detection result;

According to the first detection result, obtaining a first sewage treatment performance of the first sewage treatment reagent for sewage treatment according to the first treatment mode;

and when the first sewage treatment performance meets the treatment requirement for the target sewage, treating the target sewage by using the first sewage treatment reagent.

2. The wastewater treatment method according to claim 1, characterized in that the method further comprises:

treating the sewage with the first sewage treatment reagent according to a second treatment mode, wherein the second treatment mode comprises the following steps:

Treating sewage by using the first sewage treatment reagent to obtain treated sewage;

Irrigating the target soil with the treated wastewater at the first frequency;

detecting the heavy metal content in the target soil after irrigation for the first time period to obtain a first detection result;

planting a repair plant on the target soil;

detecting the heavy metal content of target soil after planting for a second time period to obtain a second detection result;

Obtaining second sewage treatment performance of the first sewage treatment reagent for sewage treatment according to the second treatment mode according to the first detection result and the second detection result;

and when the second sewage treatment performance meets the treatment requirement for the target sewage, treating the target sewage by using the first sewage treatment reagent.

3. The wastewater treatment method according to claim 2, characterized in that the method further comprises:

and treating the sewage by using the first sewage treatment reagent according to a third treatment mode, wherein the third treatment mode comprises the following steps:

Treating sewage by using the first sewage treatment reagent to obtain treated sewage;

Detecting the heavy metal content of the treated sewage to obtain the initial heavy metal content;

Planting aquatic restoration plants in the treated sewage;

heavy metal content detection is carried out on the treated sewage after the third period of planting, so as to obtain the repaired second heavy metal content;

obtaining a third detection result according to the difference between the initial heavy metal content and the repaired second heavy metal content;

Obtaining a third sewage treatment performance of the first sewage treatment reagent for sewage treatment according to the third treatment mode according to the third detection result;

and when the third sewage treatment performance meets the treatment requirement for the target sewage, treating the target sewage by using the first sewage treatment reagent.

4. A method of treating wastewater according to claim 3 and further comprising:

Determining the sewage treatment capacity of the first treatment mode according to the first sewage treatment performance, wherein the sewage treatment capacity represents the maximum sewage treatment volume and the maximum heavy metal content which can be treated;

Determining the sewage treatment capacity of the second treatment mode according to the second sewage treatment performance;

Determining the sewage treatment capacity of the third treatment mode according to the third sewage treatment performance;

acquiring the volume and heavy metal content of the target sewage;

According to the volume and heavy metal content of the target sewage, selecting a sewage treatment mode, wherein the sewage treatment mode at least comprises: the first processing mode, the second processing mode, and the third processing mode.

5. A method of treating wastewater according to claim 3 and further comprising:

The first sewage treatment reagent is added according to a target gradient, the target sewage is treated according to the first treatment mode aiming at each adding amount, and a first relation curve between the adding amount of the sewage treatment reagent and the sewage treatment effect is obtained;

Increasing the input amount of the first sewage treatment reagent according to the target gradient, and treating the target sewage according to the second treatment mode aiming at each input amount to obtain a second relation curve between the input amount of the sewage treatment reagent and the sewage treatment effect;

Increasing the input amount of the first sewage treatment reagent according to the target gradient, and treating the target sewage according to the third treatment mode aiming at each input amount to obtain a third relation curve between the input amount of the sewage treatment reagent and the sewage treatment effect;

Determining a common interval according to the slope change conditions of the first relation curve, the second relation curve and the third relation curve; the common interval represents: the slopes of the first relation curve, the second relation curve and the third relation curve are simultaneously smaller than a put-in value range of a preset threshold;

And determining the input quantity corresponding to the common interval as an optimal input quantity interval of the first sewage treatment reagent.

6. A method of treating wastewater according to claim 3 and further comprising:

The target soil is a plurality of different types of soil, and at least comprises: red soil, brown soil and black soil; the method for detecting the heavy metal content in the target soil after irrigation for the first time length, to obtain a first detection result, comprises the following steps: respectively detecting the heavy metal content in different types of soil, and determining the average value of the detected heavy metal content as the first detection result;

The repair plant is a plurality of different types of repair plants, and at least comprises: sedum alfredii, impatiens balsamina and bermuda grass; the heavy metal content detection is carried out on the target soil after the second time period of planting to obtain a second detection result, and the method comprises the following steps: respectively carrying out heavy metal content detection on target soil after each repair plant is planted for the second time period, and determining the average value of the heavy metal content obtained by detection as the second detection result;

The aquatic restoration plant is a plurality of aquatic plants of different types, and at least comprises: canna, cane shoots and shallots; the heavy metal content detection is carried out on the treated sewage after the third time period is planted to obtain the repaired second heavy metal content, and the method comprises the following steps: respectively carrying out heavy metal content detection on the treated sewage after each aquatic repair plant is planted for the third time period, and determining the average value of the detected heavy metal content as the repaired second heavy metal content;

And determining the comprehensive sewage treatment performance of the first sewage treatment reagent according to the first detection result, the second detection result and the third detection result.

7. A sewage treatment method according to claim 3, wherein, prior to treatment of the target sewage with the first sewage treatment reagent, the method further comprises:

pretreating the first sewage treatment reagent to obtain a plurality of first sewage treatment reagents with different physical states, wherein the first sewage treatment reagent at least comprises: powdered sewage treatment reagent, block sewage treatment reagent, slurry sewage treatment reagent and sewage treatment reagent solution;

Determining an optimal pretreatment mode of the first sewage treatment reagent in the first treatment mode according to the first detection result obtained after the first sewage treatment reagent in each physical state treats the target sewage according to the first treatment mode;

Determining an optimal pretreatment mode of the first sewage treatment reagent in the second treatment mode according to the second detection result obtained after the first sewage treatment reagent in each physical state treats the target sewage according to the second treatment mode;

and determining the optimal pretreatment mode of the first sewage treatment reagent in the third treatment mode according to the third detection result obtained after the first sewage treatment reagent in each physical state treats the target sewage according to the third treatment mode.

8. A sewage treatment method according to claim 3, wherein the target sewage comprises a plurality of sewage having different heavy metal contents; the method further comprises the steps of:

according to the first detection result obtained by treating the target sewage corresponding to each heavy metal content by the first sewage treatment reagent according to the first treatment mode, determining a first optimal sewage treatment capacity of the first sewage treatment reagent in the first treatment mode;

determining a second optimal sewage treatment capacity of the first sewage treatment reagent in the second treatment mode according to the second detection result obtained by treating the target sewage corresponding to each heavy metal content by the first sewage treatment reagent in the second treatment mode;

according to the third detection result obtained by treating the target sewage corresponding to each heavy metal content by the first sewage treatment reagent according to the third treatment mode, determining a third optimal sewage treatment capacity of the first sewage treatment reagent in the third treatment mode;

And determining the comprehensive optimal sewage treatment capacity of the first sewage treatment reagent according to the first optimal sewage treatment capacity, the second optimal sewage treatment capacity and the third optimal sewage treatment capacity.