Method and system for monitoring greenhouse gas emission of sewage treatment plant

Abstract

The invention discloses a sewage treatment plant greenhouse gas emission monitoring method and system, and the method comprises the steps: respectively arranging a gas flow rate monitoring device and a gas concentration monitoring device in a sewage treatment plant process unit, obtaining a plurality of monitoring distribution points, and determining the greenhouse gas emission amount of each monitoring distribution point according to the greenhouse gas emission amount of each monitoring distribution point; the greenhouse gas emission amount of the whole treatment process of the sewage treatment plant is counted, so that monitoring of the greenhouse gas emission amount of the whole treatment process of the sewage treatment plant is realized; a greenhouse gas flow velocity mean value, a gas temperature mean value and a greenhouse gas concentration mean value of each monitoring distribution point are respectively obtained according to gas flow velocity monitoring equipment and gas concentration monitoring equipment, and the air pipe air volume of each monitoring distribution point is calculated according to the greenhouse gas flow velocity mean value and the gas temperature mean value of each monitoring distribution point. And according to the air volume of the air pipe of each monitoring distribution point and the greenhouse gas concentration mean value of each monitoring distribution point, the greenhouse gas emission amount of each monitoring distribution point is calculated, and the accuracy of emission amount accounting can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of greenhouse gas emission monitoring, and in particular to a method and system for monitoring greenhouse gas emissions from a sewage treatment plant. Background Art

[0002] The current methods for calculating greenhouse gas emissions from sewage treatment plants are mostly based on the methods recommended by the International Panel on Climate Change (IPCC), and greenhouse gas emissions are calculated based on classified emission factors. However, the emission factor method is an indirect estimation method. For a specific sewage treatment plant, its treatment process, operating conditions, water inlet conditions, etc. will affect the value of the emission factor. Therefore, the emissions calculated based on the classified emission factors cannot reflect the greenhouse gas emissions of a specific sewage treatment plant in real time and accurately. In addition, the current calculations for the emission factor values ​​are limited to the biochemical treatment stage in the sewage treatment process, and lack data from the pretreatment stage and the sludge treatment stage. Therefore, the greenhouse gas emissions in the entire sewage treatment process cannot be accurately calculated. Summary of the invention

[0003] In view of this, the present invention proposes a method and system for monitoring greenhouse gas emissions from a sewage treatment plant, which can solve the defects of inaccurate emission accounting and emission accounting for the entire process in the prior art.

[0004] The technical solution of the present invention is achieved in this way:

[0005] A method for monitoring greenhouse gas emissions from a sewage treatment plant, comprising:

[0006] Gas flow rate monitoring equipment and gas concentration monitoring equipment are respectively arranged in the process units of the sewage treatment plant to obtain multiple monitoring points, wherein the process units of the sewage treatment plant include a pretreatment unit, a biochemical treatment unit, a mud-water separation unit and a sludge treatment unit;

[0007] Obtain the mean value of greenhouse gas flow rate, the mean value of gas temperature and the mean value of greenhouse gas concentration at each monitoring point based on the gas flow rate monitoring equipment and the gas concentration monitoring equipment;

[0008] Calculate the duct air volume at each monitoring point based on the average greenhouse gas flow rate and gas temperature at each monitoring point;

[0009] Calculate the greenhouse gas emissions at each monitoring point based on the duct air volume at each monitoring point and the average greenhouse gas concentration at each monitoring point;

[0010] Based on the greenhouse gas emissions of each monitoring point, the greenhouse gas emissions of the entire sewage treatment plant process are calculated.

[0011] As a further optional solution of the greenhouse gas emission monitoring method of the sewage treatment plant, the air volume of the duct at each monitoring point is calculated based on the average greenhouse gas flow rate and the average gas temperature at each monitoring point, specifically including:

[0012] Obtain the measured cross-sectional area of ​​the air duct at each monitoring point;

[0013] According to the average value of greenhouse gas flow rate at each monitoring point, the average wind speed of the air duct measurement section is obtained;

[0014] The duct air volume at each monitoring point is obtained based on the duct cross-sectional area, the average gas temperature and the average wind speed of the duct cross-sectional area.

[0015] As a further optional solution of the greenhouse gas emission monitoring method of the sewage treatment plant, the greenhouse gas emission of each monitoring point is calculated based on the air volume of the air duct at each monitoring point and the average greenhouse gas concentration at each monitoring point, specifically including:

[0016] Obtain the greenhouse gas emission time of each monitoring point;

[0017] The greenhouse gas emissions of each monitoring point are obtained based on the duct air volume of each monitoring point, the average greenhouse gas concentration of each monitoring point and the greenhouse gas emission time of each monitoring point.

[0018] As a further optional solution of the greenhouse gas emission monitoring method of the sewage treatment plant, the greenhouse gas emission of the whole process of the sewage treatment plant is calculated based on the greenhouse gas emission of each monitoring point, which specifically includes:

[0019] Obtain greenhouse gas emissions at each monitoring point at the same monitoring frequency;

[0020] According to the greenhouse gas emissions of each monitoring point at the same monitoring frequency, an emission curve chart with time as the horizontal axis is constructed;

[0021] According to the emission curve, calculate the greenhouse gas emissions of each monitoring point in a specific period of time;

[0022] According to the greenhouse gas emissions of each monitoring point in a specific time period, the greenhouse gas emissions of each treatment unit, each treatment unit and the entire sewage treatment plant in the specific time period are obtained.

[0023] A greenhouse gas emission monitoring system for a sewage treatment plant, comprising:

[0024] A layout module, used to respectively arrange gas flow rate monitoring equipment and gas concentration monitoring equipment in process units of a sewage treatment plant to obtain multiple monitoring points, wherein the process units of the sewage treatment plant include a pretreatment unit, a biochemical treatment unit, a mud-water separation unit and a sludge treatment unit;

[0025] A first acquisition module is used to respectively acquire the mean value of greenhouse gas flow rate, the mean value of gas temperature and the mean value of greenhouse gas concentration of each monitoring point according to the gas flow rate monitoring device and the gas concentration monitoring device;

[0026] The duct air volume calculation module is used to calculate the duct air volume of each monitoring point based on the average greenhouse gas flow rate and gas temperature at each monitoring point;

[0027] A greenhouse gas emission calculation module is used to calculate the greenhouse gas emission of each monitoring point based on the air volume of the air duct at each monitoring point and the average greenhouse gas concentration at each monitoring point;

[0028] The statistical module is used to calculate the greenhouse gas emissions of the entire sewage treatment plant process based on the greenhouse gas emissions of each monitoring point.

[0029] As a further optional solution of the greenhouse gas emission monitoring system of the sewage treatment plant, the air duct air volume calculation module includes:

[0030] The second acquisition module is used to obtain the measured cross-sectional area of ​​the air duct at each monitoring point;

[0031] The third acquisition module is used to obtain the average wind speed of the air duct measurement section according to the average greenhouse gas flow rate of each monitoring point;

[0032] The first calculation module is used to obtain the duct air volume of each monitoring point based on the duct measurement cross-sectional area, the gas temperature average and the duct measurement cross-sectional average wind speed.

[0033] As a further optional solution of the greenhouse gas emission monitoring system of the sewage treatment plant, the greenhouse gas emission calculation module includes:

[0034] The fourth acquisition module is used to obtain the greenhouse gas emission time of each monitoring point;

[0035] The second calculation module is used to obtain the greenhouse gas emissions of each monitoring point based on the duct air volume of each monitoring point, the average greenhouse gas concentration of each monitoring point and the greenhouse gas emission time of each monitoring point.

[0036] As a further optional solution of the greenhouse gas emission monitoring system of the sewage treatment plant, the statistical module includes:

[0037] The fifth acquisition module is used to obtain the greenhouse gas emissions of each monitoring point at the same monitoring frequency;

[0038] A construction module is used to construct an emission curve graph with time as the horizontal axis according to the greenhouse gas emissions of each monitoring point at the same monitoring frequency;

[0039] The third calculation module is used to calculate the greenhouse gas emissions of each monitoring point in a specific time period according to the emission curve chart;

[0040] The execution module is used to collect statistics based on the greenhouse gas emissions of each monitoring point in a specific time period, and obtain the greenhouse gas emissions of each treatment unit, each treatment unit and the entire sewage treatment plant in the specific time period.

[0041] A computing device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above-mentioned methods for monitoring greenhouse gas emissions from a sewage treatment plant when executing the computer program.

[0042] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of any one of the above-mentioned methods for monitoring greenhouse gas emissions from a sewage treatment plant.

[0043] The beneficial effects of the present invention are as follows: by arranging gas flow rate monitoring equipment and gas concentration monitoring equipment in process units of a sewage treatment plant respectively, a plurality of monitoring points are obtained; based on the greenhouse gas emissions of each monitoring point, the greenhouse gas emissions of the entire treatment process of the sewage treatment plant are statistically calculated, thereby realizing the monitoring of greenhouse gas emissions of the entire process of the sewage treatment plant; at the same time, by obtaining the average greenhouse gas flow rate, the average gas temperature and the average greenhouse gas concentration of each monitoring point respectively based on the gas flow rate monitoring equipment and the gas concentration monitoring equipment, the duct air volume of each monitoring point is calculated based on the average greenhouse gas flow rate and the average gas temperature of each monitoring point, and the greenhouse gas emissions of each monitoring point are calculated based on the duct air volume of each monitoring point and the average greenhouse gas concentration of each monitoring point, thereby improving the accuracy of emission accounting. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1A schematic diagram of a process for monitoring greenhouse gas emissions from a sewage treatment plant according to the present invention;

[0046] Figure 2 A schematic diagram of the composition of a greenhouse gas emission monitoring system for a sewage treatment plant according to the present invention;

[0047] Figure 3 It is a schematic diagram of the emission curve diagram in the present invention;

[0048] Figure 4 It is a schematic diagram of the process unit of the sewage treatment plant in the present invention. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] refer to Figure 1 , a method for monitoring greenhouse gas emissions from a sewage treatment plant, specifically comprising:

[0051] Gas flow rate monitoring equipment and gas concentration monitoring equipment are respectively arranged in the process units of the sewage treatment plant to obtain multiple monitoring points, wherein the process units of the sewage treatment plant include a pretreatment unit, a biochemical treatment unit, a mud-water separation unit and a sludge treatment unit;

[0052] Obtain the mean value of greenhouse gas flow rate, the mean value of gas temperature and the mean value of greenhouse gas concentration at each monitoring point based on the gas flow rate monitoring equipment and the gas concentration monitoring equipment;

[0053] Calculate the duct air volume at each monitoring point based on the average greenhouse gas flow rate and gas temperature at each monitoring point;

[0054] Calculate the greenhouse gas emissions at each monitoring point based on the duct air volume at each monitoring point and the average greenhouse gas concentration at each monitoring point;

[0055] Based on the greenhouse gas emissions of each monitoring point, the greenhouse gas emissions of the entire sewage treatment plant process are calculated.

[0056] In this embodiment, by arranging gas flow rate monitoring equipment and gas concentration monitoring equipment in the process units of the sewage treatment plant respectively, a plurality of monitoring points are obtained, and based on the greenhouse gas emissions of each monitoring point, the greenhouse gas emissions of the entire treatment process of the sewage treatment plant are statistically calculated, thereby realizing the monitoring of greenhouse gas emissions of the entire process of the sewage treatment plant. At the same time, by obtaining the average greenhouse gas flow rate, the average gas temperature and the average greenhouse gas concentration of each monitoring point respectively based on the gas flow rate monitoring equipment and the gas concentration monitoring equipment, the duct air volume of each monitoring point is calculated based on the average greenhouse gas flow rate and the average gas temperature of each monitoring point, and the greenhouse gas emissions of each monitoring point are calculated based on the duct air volume of each monitoring point and the average greenhouse gas concentration of each monitoring point, thereby improving the accuracy of emission accounting.

[0057] It should be noted that the gas flow rate monitoring equipment adopts an air volume tester, and the gas concentration monitoring equipment adopts a trace gas analyzer. The sampling method is: gas concentration monitoring 1 minute / time, data transmission 1 hour / time, and the transmitted data is the average of the monitoring data within 1 hour; gas flow rate monitoring 1 minute / time, data transmission 1 hour / time, and the transmitted data is the average of the monitoring data within 1 hour; greenhouse gas concentration data includes CH4 and N2O concentration data; in addition, a gas temperature monitoring module is provided in the gas flow rate monitoring equipment, including but not limited to a temperature sensor, which is not specifically limited here, and the gas temperature average is obtained through the gas temperature monitoring module.

[0058] In addition, the method also includes a human-machine interface function, so that operators can intuitively understand the greenhouse gas emission data at all levels of the sewage treatment plant, including different time periods, different process units and treatment units; at the same time, control commands for online measuring instruments can be implemented, such as start, stop, monitoring frequency adjustment and other operations; in addition, when an abnormal situation occurs in the online instrument or transmission equipment, the human-machine interface can promptly alarm and diagnose the error; finally, various data of the equipment during the working process can be recorded and stored.

[0059] Preferably, the method of calculating the duct air volume of each monitoring point based on the average greenhouse gas flow rate and the average gas temperature of each monitoring point specifically includes:

[0060] Obtain the measured cross-sectional area of ​​the air duct at each monitoring point;

[0061] According to the average value of greenhouse gas flow rate at each monitoring point, the average wind speed of the air duct measurement section is obtained;

[0062] The duct air volume at each monitoring point is obtained based on the duct cross-sectional area, the average gas temperature and the average wind speed of the duct cross-sectional area.

[0063] In this embodiment, (1) the calculation formula of the air volume of the air duct is as follows:

[0064] Q = 3600AV;

[0065] In the formula: A is the measured cross-sectional area of ​​the duct, V is the average wind speed of the measured cross-sectional area of ​​the duct, and Q is the air volume of the duct.

[0066] In addition, Q is the air volume at the real-time detection temperature. Since temperature has a great influence on the change of gas flow rate and the atmospheric pressure at a fixed location is relatively stable, the calculation formula for converting the air volume Q standard under standard conditions (temperature is 293.15K / 20℃) is as follows:

[0067] Q mark = QT / 293.15

[0068] Where: T is the average thermodynamic temperature of the gas measured in real time.

[0069] (2) The calculation method of the cross-sectional area A is related to the shape of the air duct of the air volume tester. The specific calculation formula is as follows:

[0070] For round ducts:

[0071] The area calculation formula of a circular air duct is: A = πr 2 , where A is the area, π~3.14, and r is the radius. Once the diameter d of the duct is determined, the formula A=πd 2 / 4 to calculate;

[0072] For square ducts:

[0073] The area calculation formula of the square duct is: A = a 2 , where A is the area and a is the side length;

[0074] For rectangular ducts:

[0075] The area calculation formula of a rectangular duct is: A = ab, where A is the area, and a and b are the length and width of the rectangle;

[0076] For oval ducts:

[0077] The area calculation formula of an elliptical duct is: A=πab, where A is the area, and a and b are the major and minor axes of the ellipse.

[0078] Preferably, the greenhouse gas emissions of each monitoring point are calculated based on the air volume of the air duct at each monitoring point and the average greenhouse gas concentration at each monitoring point, specifically including:

[0079] Obtain the greenhouse gas emission time of each monitoring point;

[0080] The greenhouse gas emissions of each monitoring point are obtained based on the duct air volume of each monitoring point, the average greenhouse gas concentration of each monitoring point and the greenhouse gas emission time of each monitoring point.

[0081] In this embodiment, the calculation formula for greenhouse gas emissions is as follows:

[0082]

[0083] Among them, Q is the air volume of the duct, T is the mean thermodynamic temperature of greenhouse gases, C is the concentration of greenhouse gases, t is the emission time, and CE is the greenhouse gas emission;

[0084] Combined with the duct air volume calculation formula, the greenhouse gas emission calculation formula is as follows:

[0085]

[0086] Where: A is the cross-sectional area of ​​the duct, V is the average wind speed of the duct, T is the mean thermodynamic temperature of greenhouse gases, C is the greenhouse gas concentration, t is the emission time, and CE is the greenhouse gas emission.

[0087] Preferably, the greenhouse gas emissions of the entire treatment process of the sewage treatment plant are calculated based on the greenhouse gas emissions of each monitoring point, specifically including:

[0088] Obtain greenhouse gas emissions at each monitoring point at the same monitoring frequency;

[0089] According to the greenhouse gas emissions of each monitoring point at the same monitoring frequency, an emission curve chart with time as the horizontal axis is constructed;

[0090] According to the emission curve, calculate the greenhouse gas emissions of each monitoring point in a specific period of time;

[0091] According to the greenhouse gas emissions of each monitoring point in a specific time period, the greenhouse gas emissions of each treatment unit, each treatment unit and the entire sewage treatment plant in the specific time period are obtained.

[0092] In this embodiment, if Figure 3 As shown in the figure, the wind speed and concentration detection frequency are once every 1 minute, and the greenhouse gas emission data is calculated once every 1 minute, and then the emission curve with time as the horizontal axis is obtained. According to the emission curve, the integral formula is used Get the greenhouse gas emissions CE of each monitoring point in a specific time period (t1~t2) a .

[0093] Statistical analysis of emissions:

[0094] According to the actual greenhouse gas collection situation of the sewage treatment plant, the number of points for each treatment unit is different, and the greenhouse gas emissions are counted from different levels based on the layout of the greenhouse gas emission points;

[0095] Processing monomer:

[0096] Assume that the number of distribution points for each processing unit is n, and the greenhouse gas emissions of each distribution point are CE ai (i is 1 to n), then the greenhouse gas emissions of each processing unit are

[0097] Process unit:

[0098] like Figure 4 As shown, the process units of the sewage treatment plant are divided into pretreatment unit, biochemical treatment unit, mud-water separation unit, and sludge treatment unit. The number of treatment units in each process unit is different. Assuming that the number of treatment units in each process unit is m, the greenhouse gas emissions of each treatment unit are CE bi (i is 1~m), then the greenhouse gas emissions of each process unit are

[0099] Total sewage treatment plant volume:

[0100] The greenhouse gas emissions of the pretreatment unit, biochemical treatment unit, mud-water separation unit, and sludge treatment unit are CE C1 ,CE C2 ,CE C3 ,CE C4 ,The total greenhouse gas emissions of the whole process of the sewage treatment plant is the sum of the emissions of all process units, that is, Where i is 1 to 4. The total number of plant emission data is 4mn.

[0101] like Figure 2 As shown, a greenhouse gas emission monitoring system for a sewage treatment plant comprises:

[0102] A layout module, used to respectively arrange gas flow rate monitoring equipment and gas concentration monitoring equipment in process units of a sewage treatment plant to obtain multiple monitoring points, wherein the process units of the sewage treatment plant include a pretreatment unit, a biochemical treatment unit, a mud-water separation unit and a sludge treatment unit;

[0103] A first acquisition module is used to respectively acquire the mean value of the greenhouse gas flow rate and the mean value of the greenhouse gas concentration of each monitoring point according to the gas flow rate monitoring device and the gas concentration monitoring device;

[0104] The air duct volume calculation module is used to calculate the air duct volume of each monitoring point based on the average greenhouse gas flow rate of each monitoring point;

[0105] A greenhouse gas emission calculation module is used to calculate the greenhouse gas emission of each monitoring point based on the air volume of the air duct at each monitoring point and the average greenhouse gas concentration at each monitoring point;

[0106] The statistical module is used to calculate the greenhouse gas emissions of the entire sewage treatment plant process based on the greenhouse gas emissions of each monitoring point.

[0107] Preferably, the air duct air volume calculation module includes:

[0108] The second acquisition module is used to obtain the measured cross-sectional area of ​​the air duct at each monitoring point;

[0109] The third acquisition module is used to obtain the average wind speed of the air duct measurement section according to the average greenhouse gas flow rate of each monitoring point;

[0110] The first calculation module is used to obtain the duct air volume of each monitoring point based on the duct measurement cross-sectional area and the duct measurement cross-sectional average wind speed.

[0111] Preferably, the greenhouse gas emissions calculation module includes:

[0112] The fourth acquisition module is used to obtain the greenhouse gas emission time of each monitoring point;

[0113] The second calculation module is used to obtain the greenhouse gas emissions of each monitoring point based on the air volume of the air duct at each monitoring point, the average greenhouse gas concentration of each monitoring point and the greenhouse gas emission time of each monitoring point.

[0114] Preferably, the statistical module includes:

[0115] The fifth acquisition module is used to obtain the greenhouse gas emissions of each monitoring point at the same monitoring frequency;

[0116] A construction module is used to construct an emission curve graph with time as the horizontal axis according to the greenhouse gas emissions of each monitoring point at the same monitoring frequency;

[0117] The third calculation module is used to calculate the greenhouse gas emissions of each monitoring point in a specific time period according to the emission curve chart;

[0118] The execution module is used to collect statistics based on the greenhouse gas emissions of each monitoring point in a specific time period, and obtain the greenhouse gas emissions of each treatment unit, each treatment unit and the entire sewage treatment plant in the specific time period.

[0119] A computing device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above-mentioned methods for monitoring greenhouse gas emissions from a sewage treatment plant when executing the computer program.

[0120] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of any one of the above-mentioned methods for monitoring greenhouse gas emissions from a sewage treatment plant.

[0121] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for monitoring greenhouse gas emissions from a sewage treatment plant, characterized in that: Specifically include: Gas flow rate monitoring equipment and gas concentration monitoring equipment are respectively arranged in the process units of the sewage treatment plant to obtain multiple monitoring points, wherein the process units of the sewage treatment plant include a pretreatment unit, a biochemical treatment unit, a mud-water separation unit and a sludge treatment unit; Obtain the mean value of greenhouse gas flow rate, the mean value of gas temperature and the mean value of greenhouse gas concentration at each monitoring point based on the gas flow rate monitoring equipment and the gas concentration monitoring equipment; Calculate the duct air volume at each monitoring point based on the average greenhouse gas flow rate and gas temperature at each monitoring point; Calculate the greenhouse gas emissions at each monitoring point based on the duct air volume at each monitoring point and the average greenhouse gas concentration at each monitoring point; Based on the greenhouse gas emissions of each monitoring point, the greenhouse gas emissions of the entire sewage treatment plant process are calculated.

2. A method for monitoring greenhouse gas emissions from a sewage treatment plant according to claim 1, characterized in that: The calculation of the duct air volume at each monitoring point based on the average greenhouse gas flow rate and the average gas temperature at each monitoring point specifically includes: Obtain the measured cross-sectional area of ​​the air duct at each monitoring point; According to the average value of greenhouse gas flow rate at each monitoring point, the average wind speed of the air duct measurement section is obtained; The duct air volume at each monitoring point is obtained based on the duct cross-sectional area, the average gas temperature and the average wind speed of the duct cross-sectional area.

3. A method for monitoring greenhouse gas emissions from a sewage treatment plant according to claim 2, characterized in that: The greenhouse gas emissions at each monitoring point are calculated based on the air volume of the air duct at each monitoring point and the average greenhouse gas concentration at each monitoring point, specifically including: Obtain the greenhouse gas emission time of each monitoring point; The greenhouse gas emissions of each monitoring point are obtained based on the duct air volume of each monitoring point, the average greenhouse gas concentration of each monitoring point and the greenhouse gas emission time of each monitoring point.

4. A method for monitoring greenhouse gas emissions from a sewage treatment plant according to claim 3, characterized in that: According to the greenhouse gas emissions of each monitoring point, the greenhouse gas emissions of the entire process of the sewage treatment plant are calculated, including: Obtain greenhouse gas emissions at each monitoring point at the same monitoring frequency; According to the greenhouse gas emissions of each monitoring point at the same monitoring frequency, an emission curve chart with time as the horizontal axis is constructed; According to the emission curve, calculate the greenhouse gas emissions of each monitoring point in a specific period of time; According to the greenhouse gas emissions of each monitoring point in a specific time period, the greenhouse gas emissions of each treatment unit, each treatment unit and the entire sewage treatment plant in the specific time period are obtained.

5. A greenhouse gas emission monitoring system for a sewage treatment plant, characterized in that: include: A layout module, used to respectively arrange gas flow rate monitoring equipment and gas concentration monitoring equipment in process units of a sewage treatment plant to obtain multiple monitoring points, wherein the process units of the sewage treatment plant include a pretreatment unit, a biochemical treatment unit, a mud-water separation unit and a sludge treatment unit; A first acquisition module is used to respectively acquire the mean value of greenhouse gas flow rate, the mean value of gas temperature and the mean value of greenhouse gas concentration of each monitoring point according to the gas flow rate monitoring device and the gas concentration monitoring device; The duct air volume calculation module is used to calculate the duct air volume of each monitoring point based on the average greenhouse gas flow rate and gas temperature at each monitoring point; A greenhouse gas emission calculation module is used to calculate the greenhouse gas emission of each monitoring point based on the air volume of the air duct at each monitoring point and the average greenhouse gas concentration at each monitoring point; The statistical module is used to calculate the greenhouse gas emissions of the entire sewage treatment plant process based on the greenhouse gas emissions of each monitoring point.

6. A greenhouse gas emission monitoring system for a sewage treatment plant according to claim 5, characterized in that: The air duct air volume calculation module includes: The second acquisition module is used to obtain the measured cross-sectional area of ​​the air duct at each monitoring point; The third acquisition module is used to obtain the average wind speed of the air duct measurement section according to the average greenhouse gas flow rate of each monitoring point; The first calculation module is used to obtain the duct air volume of each monitoring point based on the duct measurement cross-sectional area, the gas temperature average and the duct measurement cross-sectional average wind speed.

7. A greenhouse gas emission monitoring system for a sewage treatment plant according to claim 6, characterized in that: The greenhouse gas emission calculation module includes: The fourth acquisition module is used to obtain the greenhouse gas emission time of each monitoring point; The second calculation module is used to obtain the greenhouse gas emissions of each monitoring point based on the air volume of the air duct at each monitoring point, the average greenhouse gas concentration of each monitoring point and the greenhouse gas emission time of each monitoring point.

8. A greenhouse gas emission monitoring system for a sewage treatment plant according to claim 7, characterized in that: The statistics module includes: The fifth acquisition module is used to obtain the greenhouse gas emissions of each monitoring point at the same monitoring frequency; A construction module is used to construct an emission curve graph with time as the horizontal axis according to the greenhouse gas emissions of each monitoring point at the same monitoring frequency; The third calculation module is used to calculate the greenhouse gas emissions of each monitoring point in a specific time period according to the emission curve chart; The execution module is used to collect statistics based on the greenhouse gas emissions of each monitoring point in a specific time period, and obtain the greenhouse gas emissions of each treatment unit, each treatment unit and the entire sewage treatment plant in the specific time period.

9. A computing device, characterized in that The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of claims 1 to 4 of the method for monitoring greenhouse gas emissions from a sewage treatment plant when executing the computer program.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, which, when executed by a processor, implements the steps of any one of the methods for monitoring greenhouse gas emissions from a sewage treatment plant in claims 1-4.

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