Layered monitoring method and device for greenhouse gas of semi-underground sewage treatment plant

Abstract

The invention provides a semi-underground sewage treatment plant greenhouse gas layered monitoring method and device, and the method comprises the steps: carrying out the greenhouse gas monitoring of an underground pool body, a ground gas accumulation area, a ground open pool body and a deodorization device of a semi-underground sewage treatment plant in a layered manner, and collecting the monitoring results of each layer; and analyzing the summarized monitoring result of each layer, and outputting an analysis result. According to the invention, different areas (underground pools, ground gas accumulation areas, ground open pools and deodorization devices) of the sewage treatment plant are monitored in a layered manner, so that greenhouse gas emission characteristics of each area can be accurately captured, all key areas can be comprehensively monitored, collected monitoring results of each layer are analyzed, analysis results are output, and the analysis results can be used for monitoring the sewage treatment plant. A basis is provided for making more accurate emission reduction measures for a semi-underground sewage treatment plant, and the greenhouse gas emission control effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of greenhouse gas monitoring, and in particular to a method and device for stratified monitoring of greenhouse gases in a semi-underground sewage treatment plant. Background Art

[0002] In semi-underground wastewater treatment plants, the unique structure of underground tanks and surface gas accumulation areas complicates issues such as gas accumulation and uneven diffusion. This complex gas distribution often makes traditional single-site monitoring methods unable to characterize greenhouse gas emissions in each area, thus affecting the effectiveness of greenhouse gas emission control.

[0003] Several existing monitoring schemes have different focuses, but they all have limitations. For example, existing scheme 1 (CN119534755 A) monitors gas emissions from open reaction tanks by deploying floating gas collection devices along the sewage treatment path, but fails to account for the complex gas distribution in semi-underground sewage treatment plants. Existing scheme 2 (CN119334431A) implements full-process greenhouse gas emission statistics by deploying gas flow rate and gas concentration monitoring equipment within the sewage treatment plant's process units. However, this approach still fails to address the monitoring challenge of uneven gas accumulation in semi-underground structures. Existing scheme 3 (CN118817638A) analyzes gas samples using an online optical analyzer, but this approach may struggle to adapt to uneven gas distribution in complex semi-underground structures. Existing scheme 4 (application number CN116990453B) monitors greenhouse gas emissions from the sewage treatment process using a front-end monitoring module and a data processing module. While this allows for full-process monitoring, it may still not fully address the complexities of uneven gas distribution in semi-underground sewage treatment plants.

[0004] Therefore, a new monitoring technology and solution is urgently needed for greenhouse gas monitoring of semi-underground sewage treatment plants to more accurately reflect their emission characteristics and optimize emission control. Summary of the Invention

[0005] One of the purposes of the present invention is to provide a method for stratified monitoring of greenhouse gases in a semi-underground sewage treatment plant to address the deficiencies in the background technology.

[0006] The embodiment of the present invention provides a method for monitoring greenhouse gases in a semi-underground sewage treatment plant by layers, including:

[0007] Conduct greenhouse gas monitoring on a layered basis for the underground tanks, surface gas accumulation areas, surface open tanks, and deodorization devices of semi-underground sewage treatment plants, and summarize the monitoring results for each layer;

[0008] Analyze the aggregated monitoring results at each layer and output the analysis results.

[0009] Optionally, the steps for greenhouse gas monitoring of underground pools are as follows:

[0010] Control the gas sampling end of the portable infrared gas analyzer to move vertically downward at a uniform speed from the observation window of the underground pool;

[0011] During the movement, a depth scan of the layers reached in the underground pool is performed at preset time intervals;

[0012] After the movement is completed, the depth scan results of each layer are summarized;

[0013] Based on the summarized depth scanning results of each layer, the average concentration of each layer and the instantaneous gas release rate are calculated respectively;

[0014] The mass emission rate is calculated based on the stratified average concentration and the instantaneous gas release rate.

[0015] Optionally, the steps for greenhouse gas monitoring in areas with ground-based gas accumulation are as follows:

[0016] Plan the navigation routes of mobile monitoring vehicles deployed in areas of ground gas accumulation;

[0017] Based on the navigation route, the moving monitoring vehicle is controlled to conduct greenhouse gas monitoring on the ground gas accumulation area.

[0018] Optional greenhouse gas monitoring procedures for above-ground open pools are as follows:

[0019] Based on the flux chamber monitoring method, the greenhouse gas emission flux of the ground open pool is obtained;

[0020] Greenhouse gas emissions from ground-based open pools are calculated based on the greenhouse gas emission flux and surface area of ​​the open pools.

[0021] Optionally, the steps for greenhouse gas monitoring of the deodorization device are as follows:

[0022] Monitor the gas concentration, flow rate and pipe cross-sectional area at the monitoring point of the outlet straight pipe section of the deodorization device;

[0023] Calculate greenhouse gas emissions from the deodorization device based on gas concentration, flow rate, and pipe cross-sectional area.

[0024] Optionally, the steps for analyzing the aggregated monitoring results at each layer are as follows:

[0025] Analyze and summarize the monitoring results at each level to determine the total amount of emissions.

[0026] Optionally, the steps for analyzing the aggregated monitoring results at each layer are as follows:

[0027] Based on the aggregated monitoring results of each layer, the spatial distribution of greenhouse gases is constructed;

[0028] Based on the spatial distribution of greenhouse gases, decide on the optimal path for emission reduction.

[0029] Optionally, the steps for analyzing the aggregated monitoring results at each layer are as follows:

[0030] Based on the summarized monitoring results of each layer, the collection efficiency of the deodorization device is estimated.

[0031] Optionally, the gas sampling end of the portable infrared gas analyzer is provided with a dehumidification device.

[0032] The embodiment of the present invention provides a method for monitoring greenhouse gases in a semi-underground sewage treatment plant by layers, including:

[0033] The layered greenhouse gas monitoring module is used to monitor greenhouse gases in the underground tanks, surface gas accumulation areas, surface open tanks, and deodorization devices of semi-underground sewage treatment plants in different layers, and summarize the monitoring results of each layer;

[0034] The monitoring result analysis module is used to analyze the aggregated monitoring results of each layer and output the analysis results.

[0035] Optionally, the steps for greenhouse gas monitoring of underground pools are as follows:

[0036] Control the gas sampling end of the portable infrared gas analyzer to move vertically downward at a uniform speed from the observation window of the underground pool;

[0037] During the movement, a depth scan of the layers reached in the underground pool is performed at preset time intervals;

[0038] After the movement is completed, the depth scan results of each layer are summarized;

[0039] Based on the summarized depth scanning results of each layer, the average concentration of each layer and the instantaneous gas release rate are calculated respectively;

[0040] The mass emission rate is calculated based on the stratified average concentration and the instantaneous gas release rate.

[0041] Optionally, the steps for greenhouse gas monitoring in areas with ground-based gas accumulation are as follows:

[0042] Plan the navigation routes of mobile monitoring vehicles deployed in areas of ground gas accumulation;

[0043] Based on the navigation route, the moving monitoring vehicle is controlled to conduct greenhouse gas monitoring on the ground gas accumulation area.

[0044] Optional greenhouse gas monitoring procedures for above-ground open pools are as follows:

[0045] Based on the flux chamber monitoring method, the greenhouse gas emission flux of the ground open pool is obtained;

[0046] Greenhouse gas emissions from ground-based open pools are calculated based on the greenhouse gas emission flux and surface area of ​​the open pools.

[0047] Optionally, the steps for greenhouse gas monitoring of the deodorization device are as follows:

[0048] Monitor the gas concentration, flow rate and pipe cross-sectional area at the monitoring point of the outlet straight pipe section of the deodorization device;

[0049] Calculate greenhouse gas emissions from the deodorization device based on gas concentration, flow rate, and pipe cross-sectional area.

[0050] Optionally, the steps for analyzing the aggregated monitoring results at each layer are as follows:

[0051] Analyze and summarize the monitoring results at each level to determine the total amount of emissions.

[0052] Optionally, the steps for analyzing the aggregated monitoring results at each layer are as follows:

[0053] Based on the aggregated monitoring results of each layer, the spatial distribution of greenhouse gases is constructed;

[0054] Based on the spatial distribution of greenhouse gases, decide on the optimal path for emission reduction.

[0055] Optionally, the steps for analyzing the aggregated monitoring results at each layer are as follows:

[0056] Based on the summarized monitoring results of each layer, the collection efficiency of the deodorization device is estimated.

[0057] Optionally, the gas sampling end of the portable infrared gas analyzer is provided with a dehumidification device.

[0058] The present invention has achieved the following beneficial effects:

[0059] By conducting layered monitoring of different areas of the sewage treatment plant (underground tanks, ground gas accumulation areas, ground open tanks, and deodorization devices), the greenhouse gas emission characteristics of each area can be accurately captured, ensuring comprehensive monitoring of all key areas. The aggregated monitoring results of each layer are analyzed and output, providing a basis for the formulation of more precise emission reduction measures for semi-underground sewage treatment plants, thereby improving the effectiveness of greenhouse gas emission control.

[0060] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0061] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0063] Figure 1 Schematic diagram of a stratified greenhouse gas monitoring method for a semi-underground sewage treatment plant according to an embodiment of the present invention;

[0064] Figure 2 Schematic diagram of a high nitrous oxide emission area detected near the pretreatment and biochemical treatment section in an embodiment of the present invention;

[0065] Figure 3 Schematic diagram of a greenhouse gas stratification monitoring system for a semi-underground sewage treatment plant according to an embodiment of the present invention. DETAILED DESCRIPTION

[0066] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0067] Example 1:

[0068] The embodiment of the present invention provides a method for monitoring greenhouse gases in a semi-underground sewage treatment plant. Figure 1 Shown, including:

[0069] Conduct greenhouse gas monitoring on a layered basis for the underground tanks, surface gas accumulation areas, surface open tanks, and deodorization devices of semi-underground sewage treatment plants, and summarize the monitoring results for each layer;

[0070] Analyze the aggregated monitoring results at each layer and output the analysis results.

[0071] By conducting layered monitoring of different areas of a sewage treatment plant (underground tanks, ground gas accumulation areas, ground open tanks, and deodorization devices), the present invention can accurately capture the greenhouse gas emission characteristics of each area, ensure comprehensive monitoring of all key areas, analyze the aggregated monitoring results of each layer, and output the analysis results, providing a basis for semi-underground sewage treatment plants to formulate more accurate emission reduction measures, thereby improving the effectiveness of greenhouse gas emission control.

[0072] Example 2:

[0073] In one embodiment, the steps for monitoring greenhouse gases in an underground pool are as follows:

[0074] Control the gas sampling end of the portable infrared gas analyzer to move vertically downward at a uniform speed from the observation window of the underground pool;

[0075] During the movement, a depth scan of the layers reached in the underground pool is performed at preset time intervals;

[0076] After the movement is completed, the depth scan results of each layer are summarized;

[0077] Based on the summarized depth scanning results of each layer, the average concentration of each layer and the instantaneous gas release rate are calculated respectively;

[0078] The mass emission rate is calculated based on the stratified average concentration and the instantaneous gas release rate.

[0079] The calculation formulas for the average concentration of each layer and the instantaneous gas release rate are as follows:

[0080]

[0081] Among them, C avg is the average concentration of each layer, C i is the gas concentration in layer i, V i is the process unit volume of the i-th layer, V total is the total volume of the process section, and n is the number of layers in the vertical direction;

[0082]

[0083] Among them, Q gas is the instantaneous gas release rate, is the aeration rate, a and b are empirical coefficients.

[0084] The mass emission rate is calculated as follows:

[0085] Mass emission rate = C avg ×Q gas

[0086] Calculation example:

[0087] Taking a semi-underground sewage treatment plant as an example, its biochemical treatment reaction tank is built underground, and an observation window is set on the ground to view the sewage treatment status of the aerobic section. When monitoring nitrous oxide emissions through the observation window, the bottom concentration C1 = 0.005kg / m 3 , volume percentage 35%; middle concentration C2 = 0.002kg / m 3 , volume percentage 35%; top concentration C3 = 0.002kg / m 3 , accounting for 30% of the volume.

[0088] Corrected aeration volume is Q gas =500m 3 / h;

[0089] The volume-weighted average concentration is C avg =0.005×0.35+0.002×0.35+0.002×0.3=0.00305kg / m 3 ;

[0090] The mass emission rate is 0.00305×500=1.52kg / h.

[0091] The observation window monitoring of the underground pool body adopts a non-invasive method to avoid destroying the sealing of the underground structure. The specific monitoring steps are as follows: First, prepare a portable infrared gas analyzer for real-time monitoring of greenhouse gas concentrations, and add a dehumidifier at the front end of the sampling port to reduce the interference of water vapor on gas detection and instrument operation. One end of the polytetrafluoroethylene gas collection pipeline is connected to the dehumidifier, and the other end is used as the gas collection end. During monitoring, for the biochemical treatment section of the semi-underground sewage treatment plant, observation windows are set in different areas (such as aerobic, anoxic, and anaerobic areas), and gas concentration detection is carried out through non-invasive, layered dynamic monitoring methods. The gas collection pipeline goes deep through the observation window and moves vertically downward at a uniform speed through a slide rail, completing a 0-5 meter depth scan every 5 minutes. The specific monitoring time and depth can be adjusted according to the actual situation of the plant.

[0092] Example 3:

[0093] In one embodiment, the steps for monitoring greenhouse gases in a ground-based gas accumulation area are as follows:

[0094] Plan the navigation routes of mobile monitoring vehicles deployed in areas of ground gas accumulation;

[0095] Based on the navigation route, the moving monitoring vehicle is controlled to conduct greenhouse gas monitoring on the ground gas accumulation area.

[0096] Gas accumulation monitoring in the ground area adopts the cruise monitoring method to analyze the distribution of greenhouse gas concentrations within the plant area and identify high emission sources. The specific operation steps include: first, deploying a cruise monitoring vehicle equipped with an on-board greenhouse gas analyzer, a meteorological monitoring system, and a satellite positioning system; then conducting preliminary data collection and investigation, confirming meteorological conditions, and collecting information on the pollution sources of greenhouse gas emissions in the sewage treatment plant area, such as the geographical location of the pollution source, treatment process, collection and purification equipment, and discharge port settings; then planning the cruise route, combining the distribution of greenhouse gas emission sources, the dominant wind direction, and the plant management requirements, and monitoring as close to the emission source as possible; before implementing cruise monitoring, start the equipment and conduct a small-scale cruise test to ensure that the equipment and instruments are operating normally and there is no significant delay in the monitoring data. During actual monitoring, the cruise vehicle is carried out at a speed of no more than 10km / h and can collect valid data within a range of about 15m. In the event of a significant increase in concentration, it will stop in time for fixed-point monitoring and record the monitoring average value of the area. Finally, by analyzing the monitoring data, we can determine the source of greenhouse gases and confirm whether it is direct emissions from the deodorization device, unorganized emissions caused by leakage, escape, etc., or abnormally high emission areas formed due to diffusion obstruction. Figure 2 As shown in the figure, taking a semi-underground sewage treatment plant as an example, the emission distribution of nitrous oxide was measured during the ground area cruise monitoring. Areas A and B are high emission areas of nitrous oxide, which are located downwind of the odor treatment devices in the pretreatment section and the biochemical treatment section, respectively, indicating that there is no unorganized emission such as leakage or escape in the plant.

[0097] Example 4:

[0098] In one embodiment, the steps for monitoring greenhouse gases in an open-ground pond are as follows:

[0099] Based on the flux chamber monitoring method, the greenhouse gas emission flux of the ground open pool is obtained;

[0100] Greenhouse gas emissions from ground-based open pools are calculated based on the greenhouse gas emission flux and surface area of ​​the open pools.

[0101] The calculation formula for greenhouse gas emissions from open-ground pools is as follows:

[0102] Q open·tanks =ER tank ×S tank

[0103] Among them, Q open·tanks is the greenhouse gas emissions of the open pond on the ground, ER tank is the greenhouse gas emission flux, S tank is the surface area of ​​the open pool.

[0104] Calculation example:

[0105] Taking a semi-underground sewage treatment plant as an example, there is an open secondary sedimentation tank without centralized gas collection and treatment. Therefore, the total amount of nitrous oxide emissions from the secondary sedimentation tank measured by the flux chamber method is: 0.0002g / m 2 h×20000m 2 =4g / h.

[0106] Example 5:

[0107] In one embodiment, the steps for monitoring greenhouse gases in a deodorization device are as follows:

[0108] Monitor the gas concentration, flow rate and pipe cross-sectional area at the monitoring point of the outlet straight pipe section of the deodorization device;

[0109] Calculate greenhouse gas emissions from the deodorization device based on gas concentration, flow rate, and pipe cross-sectional area.

[0110] The calculation formula for greenhouse gas emissions is as follows:

[0111] Q gas =C×V×A×3600×10 ﹣6

[0112] Among them, Q gas is the greenhouse gas emission, C is the gas concentration, V is the flow velocity, and A is the pipe cross-sectional area.

[0113] Calculation example:

[0114] For example, a semi-underground sewage treatment plant has deodorization equipment installed in both the pretreatment and biochemical treatment stages. After testing, the calculated emissions were 0.041 kg / h and 1.75 kg / h, respectively.

[0115] Deodorization monitoring involves detecting greenhouse gases and flow rates in the exhaust pipe following the deodorizer. The specific steps include: first, preheating the greenhouse gas analyzer and pitot tube flowmeter one hour in advance; then, selecting appropriate locations on the straight pipe section at the deodorizer outlet, avoiding turbulent areas such as elbows and valves; then, connecting the gas analyzer, dryer, and sampling probe, ensuring the air path length does not exceed 3 meters, and simultaneously collecting greenhouse gas concentration (1Hz) and flow (1Hz) for at least 5 minutes of continuous monitoring; finally, performing quality control on the data to eliminate outliers, such as concentration changes exceeding 3σ or flow fluctuations exceeding 20%.

[0116] Example 6:

[0117] In one embodiment, the steps for analyzing the aggregated monitoring results of each layer are as follows:

[0118] Analyze and summarize the monitoring results at each level to determine the total amount of emissions.

[0119] And / or, the steps for analyzing the aggregated monitoring results at each level are as follows:

[0120] Based on the aggregated monitoring results of each layer, the spatial distribution of greenhouse gases is constructed;

[0121] Based on the spatial distribution of greenhouse gases, decide on the optimal path for emission reduction.

[0122] And / or, the steps for analyzing the aggregated monitoring results at each level are as follows:

[0123] Based on the summarized monitoring results of each layer, the collection efficiency of the deodorization device is estimated.

[0124] By comprehensively analyzing greenhouse gas monitoring results from underground tanks, surface gas accumulation areas, surface open tanks, and deodorization units, it is possible to determine whether the total emissions from deodorization units represent the overall level of greenhouse gas emissions. The spatial distribution of CH4, N2O, and CO2 concentrations can be constructed based on the monitoring results from surface gas accumulation areas and surface open tanks. In actual monitoring, the differences between underground tanks, surface gas accumulation areas, and surface open tanks can be used to assess the collection efficiency of deodorization units and estimate the emissions from uncollected portions. For example, if the monitoring results from underground tanks are greater than those from surface open tanks, this may indicate an unintended emission pathway, requiring further confirmation. By employing a spatially stratified monitoring strategy, combining multi-source monitoring data from underground observation windows, surface navigation, and deodorization units, and applying spatial interpolation, diffusion models, and data assimilation techniques, a high-precision spatial distribution function for greenhouse gases can be constructed, enabling dynamic correction of emission factors. This provides a reliable technical path for carbon accounting and emission reduction optimization at wastewater treatment plants, while also continuously optimizing algorithm efficiency and data fusion strategies. The advantage of this method is that, by integrating multi-source data, it avoids the risk of underestimation that may be caused by traditional methods relying solely on a single data source, and can capture fugitive emissions more accurately; at the same time, the spatial distribution function helps identify emission hotspots and assists in formulating more targeted emission reduction measures.

[0125] Example 7:

[0126] In one embodiment, the gas sampling end of the portable infrared gas analyzer is provided with a dehumidification device.

[0127] The embodiment of the present invention provides a method for monitoring greenhouse gases in a semi-underground sewage treatment plant. Figure 2 Shown, including:

[0128] The layered greenhouse gas monitoring module is used to monitor greenhouse gases in the underground tanks, surface gas accumulation areas, surface open tanks, and deodorization devices of semi-underground sewage treatment plants in different layers, and summarize the monitoring results of each layer;

[0129] The monitoring result analysis module is used to analyze the aggregated monitoring results of each layer and output the analysis results.

[0130] The steps for greenhouse gas monitoring in underground ponds are as follows:

[0131] Control the gas sampling end of the portable infrared gas analyzer to move vertically downward at a uniform speed from the observation window of the underground pool;

[0132] During the movement, a depth scan of the layers reached in the underground pool is performed at preset time intervals;

[0133] After the movement is completed, the depth scan results of each layer are summarized;

[0134] Based on the summarized depth scanning results of each layer, the average concentration of each layer and the instantaneous gas release rate are calculated respectively;

[0135] The mass emission rate is calculated based on the stratified average concentration and the instantaneous gas release rate.

[0136] The steps for greenhouse gas monitoring in areas of ground-based gas accumulation are as follows:

[0137] Plan the navigation routes of mobile monitoring vehicles deployed in areas of ground gas accumulation;

[0138] Based on the navigation route, the moving monitoring vehicle is controlled to conduct greenhouse gas monitoring on the ground gas accumulation area.

[0139] The steps for greenhouse gas monitoring in open-ground ponds are as follows:

[0140] Based on the flux chamber monitoring method, the greenhouse gas emission flux of the ground open pool is obtained;

[0141] Greenhouse gas emissions from ground-based open pools are calculated based on the greenhouse gas emission flux and surface area of ​​the open pools.

[0142] The steps for greenhouse gas monitoring of deodorization equipment are as follows:

[0143] Monitor the gas concentration, flow rate and pipe cross-sectional area at the monitoring point of the outlet straight pipe section of the deodorization device;

[0144] Calculate greenhouse gas emissions from the deodorization device based on gas concentration, flow rate, and pipe cross-sectional area.

[0145] The steps for analyzing the aggregated monitoring results at each layer are as follows:

[0146] Analyze and summarize the monitoring results at each level to determine the total amount of emissions.

[0147] The steps for analyzing the aggregated monitoring results at each layer are as follows:

[0148] Based on the aggregated monitoring results of each layer, the spatial distribution of greenhouse gases is constructed;

[0149] Based on the spatial distribution of greenhouse gases, decide on the optimal path for emission reduction.

[0150] The steps for analyzing the aggregated monitoring results at each layer are as follows:

[0151] Based on the summarized monitoring results of each layer, the collection efficiency of the deodorization device is estimated.

[0152] The gas sampling end of the portable infrared gas analyzer is provided with a dehumidification device.

[0153] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A stratified greenhouse gas monitoring method for a semi-underground sewage treatment plant, characterized in that: include: Conduct greenhouse gas monitoring on a layered basis for the underground tanks, surface gas accumulation areas, surface open tanks, and deodorization devices of semi-underground sewage treatment plants, and summarize the monitoring results for each layer; Analyze the aggregated monitoring results at each layer and output the analysis results.

2. The method for monitoring greenhouse gases in a semi-underground sewage treatment plant according to claim 1, wherein: The steps for greenhouse gas monitoring in underground ponds are as follows: Control the gas sampling end of the portable infrared gas analyzer to move vertically downward at a uniform speed from the observation window of the underground pool; During the movement, a depth scan of the layers reached in the underground pool is performed at preset time intervals; After the movement is completed, the depth scan results of each layer are summarized; Based on the summarized depth scanning results of each layer, the average concentration of each layer and the instantaneous gas release rate are calculated respectively; The mass emission rate is calculated based on the stratified average concentration and the instantaneous gas release rate.

3. The method for monitoring greenhouse gases in a semi-underground sewage treatment plant according to claim 1, wherein: The steps for greenhouse gas monitoring in areas of ground-based gas accumulation are as follows: Plan the navigation routes of mobile monitoring vehicles deployed in areas of ground gas accumulation; Based on the navigation route, the moving monitoring vehicle is controlled to conduct greenhouse gas monitoring on the ground gas accumulation area.

4. The method for monitoring greenhouse gases in a semi-underground sewage treatment plant according to claim 1, wherein: The steps for greenhouse gas monitoring in open-ground ponds are as follows: Based on the flux chamber monitoring method, the greenhouse gas emission flux of the ground open pool is obtained; Greenhouse gas emissions from ground-based open pools are calculated based on the greenhouse gas emission flux and surface area of ​​the open pools.

5. The method for monitoring greenhouse gases in a semi-underground sewage treatment plant according to claim 1, wherein: The steps for greenhouse gas monitoring of deodorization equipment are as follows: Monitor the gas concentration, flow rate and pipe cross-sectional area at the monitoring point of the outlet straight pipe section of the deodorization device; Calculate greenhouse gas emissions from the deodorization device based on gas concentration, flow rate, and pipe cross-sectional area.

6. The method for stratified monitoring of greenhouse gases in a semi-underground sewage treatment plant according to claim 1, wherein: The steps for analyzing the aggregated monitoring results at each layer are as follows: Analyze and summarize the monitoring results at each level to determine the total amount of emissions.

7. The method for monitoring greenhouse gases in a semi-underground sewage treatment plant according to claim 1, wherein: The steps for analyzing the aggregated monitoring results at each layer are as follows: Based on the aggregated monitoring results of each layer, the spatial distribution of greenhouse gases is constructed; Based on the spatial distribution of greenhouse gases, decide on the optimal path for emission reduction.

8. The method for monitoring greenhouse gases in a semi-underground sewage treatment plant according to claim 1, wherein: The steps for analyzing the aggregated monitoring results at each layer are as follows: Based on the summarized monitoring results of each layer, the collection efficiency of the deodorization device is estimated.

9. The method for monitoring greenhouse gases in a semi-underground sewage treatment plant according to claim 2, wherein: The gas sampling end of the portable infrared gas analyzer is provided with a dehumidification device.

10. A method for monitoring greenhouse gases in a semi-underground sewage treatment plant, characterized in that: include: The layered greenhouse gas monitoring module is used to monitor greenhouse gases in the underground tanks, surface gas accumulation areas, surface open tanks, and deodorization devices of semi-underground sewage treatment plants in layers, and summarize the monitoring results of each layer; The monitoring result analysis module is used to analyze the aggregated monitoring results of each layer and output the analysis results.

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