Urban domestic water pollution source emission list compilation and intelligent supervision method

Abstract

The invention discloses an urban domestic water pollution source emission list compilation and intelligent supervision method, and the method comprises the steps: dividing the urban domestic water pollution source into point source emission and non-point source emission, and enabling the point source emission to be mainly a part, which is directly discharged to an environmental water body through a river sewage outlet, of an urban sewage treatment plant; the non-point source discharge comprises overflow discharge in rainy days, direct discharge in sunny days and rainfall runoff pollution washing discharge; the intelligent supervision platform can realize collection, cleaning, integration and analysis of urban domestic water pollution source emission list compilation data, realizes display and dynamic update of list compilation results, and can synchronously realize day / month / season / year broadcast of urban sewage treatment plant operation data. Real-time image-text warning functions of operation problems such as overproof overload, sewage overflow, external water infiltration and the like are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of urban sewage collection and treatment supervision, and particularly relates to a method for compiling and intelligently supervising a list of urban domestic water pollution sources. BACKGROUND

[0002] To solve the problem of water pollution and improve water environmental quality, China has established a series of water environmental management systems. Among them, the pollution source emission control system is the basis of the water environmental management system, aiming at pollution reduction, and taking the establishment and control of the pollution source emission list as a tool to provide important support for the water quality monitoring and supervision system and the spatial control system.

[0003] At present, the pollution source emission list in China is mainly based on statistical databases in environmental management, such as environmental statistics and pollution census. The pollution source categories covered include industrial sources, sewage plants, domestic sources, breeding sources and planting sources. The spatial precision includes national, provincial, municipal, county and township, and the time precision is mainly annual. The statistical methods of pollution source emission include the participation of pollution emission coefficient method, actual measurement method and material balance method. The pollution source emission investigation work can be divided into general investigation and special investigation, regular investigation and irregular investigation, etc. Among them, regular investigation includes statistical annual report, semi-annual report, quarterly report and monthly report, etc. The time precision of irregular investigation is determined by the environmental protection administrative departments at all levels according to the purpose of investigation.

[0004] In terms of urban domestic pollution source list, the current main work involves statistical investigation of urban sewage treatment plants and domestic sources. Among them, the emission of urban sewage treatment plants is reflected in the work systems of environmental statistics, pollution census and emission statistics, and the emission is mainly obtained by actual measurement method. The emission of domestic sources is reflected in the work systems of environmental statistics, pollution census and emission statistics, and the emission is mainly obtained by the pollution emission coefficient method.

[0005] Overall, with the continuous deepening of China's water ecological environment management work, the urban domestic water pollution source emission list is gradually rich and comprehensive, but there are still some problems, mainly as follows: ①The accounting method is rough. The emission of urban domestic sources is calculated by deducting the reduction of sewage treatment plants after calculating the amount of population and pollution coefficient, which has many estimated components and does not consider the influence of industrial wastewater.

[0006] ②The management support is insufficient. The updating speed of the accounting result is slow, and the emission is not further subdivided, which is insufficient to support the quality improvement and efficiency increase of urban sewage collection and treatment.

[0007] ③The coefficient is not fine. The statistics of domestic source emission is calculated by the number of urban population and the sewage and pollutant emission coefficient, while the emission coefficient is divided by large area, which cannot reflect the difference of the city administrative region scale.

[0008] ④ The scope is not comprehensive. my country's current urban domestic water pollution source emission inventory focuses on point source stationary sources, and pays insufficient attention to non-point source pollution.

[0009] Therefore, those skilled in the art are dedicated to developing a method for compiling and intelligently monitoring urban domestic water pollution source discharge inventories to address the shortcomings of the aforementioned existing technologies. Summary of the Invention

[0010] The purpose of this invention is to provide a method for compiling and intelligently monitoring urban domestic water pollution source discharge inventories, in order to solve the problems of crude accounting methods, insufficient management support, imprecise coefficients, and incomplete objects in the existing process of compiling urban domestic water pollution discharge inventories.

[0011] To achieve the above objectives, this invention provides a method for compiling and intelligently monitoring urban domestic water pollution source discharge inventories, comprising the following steps: S1. Pollution source classification and data collection: Taking the administrative regions such as cities, districts and counties or the service area of ​​urban sewage treatment plants as units, the urban domestic water pollution sources in the area to be analyzed are classified into point source discharge and non-point source discharge, and relevant data on urban water supply and drainage are collected through the intelligent supervision platform. S2. Point source emissions are calculated through the intelligent monitoring platform. Point source emissions are the direct discharge of urban sewage treatment plants into the environment through river discharge outlets. Based on the daily monitoring of the effluent volume and concentrations of chemical oxygen demand, ammonia nitrogen, total nitrogen, and total phosphorus of urban sewage treatment plants, the pollutant discharge volume at the river discharge outlets is directly calculated. S3. Calculate area source emissions through the intelligent monitoring platform, including: Rainy day overflow is determined by the average total amount of pollutants in the wastewater treatment plant over the 15 consecutive non-rainy days before the rainfall. When at least three of the four indicators of chemical oxygen demand, ammonia nitrogen, total nitrogen, and total phosphorus in the total amount of pollutants in the influent on a rainy day are lower than the benchmark value, rainy day overflow is determined to occur, and the difference between the benchmark value and the actual total amount of influent is included in the rainy day overflow. The direct discharge volume on sunny days is obtained by subtracting the overflow volume on rainy days from the total uncollected discharge volume of the urban sewage pipe network. Rainwater runoff scour volume is calculated based on the runoff coefficient of different urban land use types and the average concentration of runoff EMC per rainfall event, combined with rainfall data. S4. Based on the urban water supply and drainage data collected in S1 and the calculation results of S2-S3, the intelligent supervision platform automatically generates an urban domestic water pollution source discharge list, daily / monthly / quarterly / annual broadcasts of urban sewage treatment plant operation data, and graphic warnings of six types of urban domestic water pollution source discharge problems.

[0012] Preferably, the total uncollected discharge volume of the urban sewage pipe network is calculated in the following way: ;

[0013] The calculation method of sewage collection rate is as follows: taking chemical oxygen demand, ammonia nitrogen and total phosphorus as accounting factors, the total collection amount and the total production amount of each accounting factor are calculated respectively, and then the normalized total collection amount and the normalized total production amount of each accounting factor are added respectively, the pollution equivalent value of chemical oxygen demand is 1 kg, the pollution equivalent value of ammonia nitrogen is 0.8 kg, and the pollution equivalent value of total phosphorus is 0.25 kg, and the calculation formula is as follows:

[0014] Preferably, the total collection amount of the accounting factor is calculated according to the following formula:

[0015] The total amount of pollutants entering the urban sewage treatment plant is obtained by statistical accounting of the monitoring data of water quality and quantity of the urban sewage treatment plant; the pipe network degradation coefficient is referenced from the degradation rate of septic tank to pollutants in the first national pollution source census or the local measured value; the pollutant concentration of the infiltrated external water is the average value of the pollutant concentration of the monitoring section of surface water, and the total amount of carried pollutants is calculated according to the following formula:

[0016] Preferably, the total production amount of the accounting factor is calculated according to the following formula:

[0017]

[0018] The background concentration of urban domestic sewage is the maximum value of the following three: the weighted average of the concentration survey value of the drainage households of typical residential buildings, commercial services, science and education, health and public institutions in the urban area; the highest monthly water pollutant concentration of the urban sewage treatment plant or the highest water pollutant concentration of the urban sewage treatment plant during the Spring Festival when the proportion of industrial wastewater collection is less than 5%; The total amount of industrial enterprise pollutant collection is obtained by statistical accounting of the water quality and quantity monitoring data of the industrial enterprise wastewater collection discharge port.

[0019] Preferably, the rainwater runoff scouring amount is calculated according to the following formula: The automatic monitoring facilities are arranged at the rainwater discharge outlets of the different land use property plots in the typical town area, and the runoff is sampled every 5 minutes within 30 minutes, every 15 minutes within 30-60 minutes, and every 30 minutes thereafter from the beginning of runoff formation at the rainwater discharge outlet during rainfall, until the runoff stops, so as to obtain the flow and pollutant concentration data of the different land use property plots. The minute-scale rainfall data measured by the rain gauge are weighted and averaged to calculate the runoff coefficient and EMC concentration of the different land use property plots, and the rainwater runoff pollution scouring discharge is calculated by combining the area statistics of the different land use property plots in the whole town area.

[0020] Specifically, the method comprises the following steps: (1) calculating the average concentration EMC of the runoff of a land use property plot in a rainfall event k : the pollutant concentration of each period is weighted and averaged according to the runoff of each period, and the formula is:

[0021] wherein, EMC k is the average concentration of the runoff of a land use property plot in a rainfall event, with the unit of mg / l; C i is the pollutant concentration of the i-th period, with the unit of mg / l; Q i is the instantaneous flow of the i-th period, with the unit of l / s; t i is the time length of the i-th period, with the unit of s; and n is the total sampling number; (2) calculating the runoff coefficient J k of a land use property plot : the formula is:

[0022] wherein, J k is the runoff coefficient of a land use property plot, with no dimension; S k is the plot area, with the unit of hm 2 ; and P is the rainfall, with the unit of mm.

[0023] (3) calculating the rainwater runoff scouring amount M, and the formula is:

[0024] wherein, M is the rainwater runoff scouring amount, with the unit of t; and m is the total number of land use types.

[0025] Preferably, the intelligent supervision platform comprises a data acquisition module, a data cleaning module, a data integration module, a multi-dimensional data algorithm analysis module and a business management and application module, and specifically comprises: The data acquisition module is used to collect urban water supply and drainage related data of cities, counties, and towns within the area to be analyzed, and transmit it to the data cleaning module. The urban water supply and drainage related data includes GIS data on the distribution of water users in the water supply departments of cities, counties, and towns within the area, water consumption statistics and water fee collection data of each water user, automatic monitoring data on the influent and effluent flow and pollutant concentration of urban sewage treatment plants, automatic monitoring data on the flow and pollutant concentration of industrial wastewater discharged into the sewer system, automatic monitoring data on the flow and pollutant concentration of wastewater discharged into the sewer system from other pollution sources, GIS data of stormwater and sewage pipe networks, surface water monitoring data, automatic monitoring data on the flow and pollutant concentration of stormwater discharge outlets, and vector data of urban area land use type survey. The data cleaning module is used to audit and verify urban water supply and drainage related data, process and clean erroneous and abnormal data, obtain cleaned urban water supply and drainage related data, and transmit the cleaned urban water supply and drainage related data to the data integration module. The data integration module is used to intelligently integrate the cleaned urban water supply and drainage related data, match the water supply and drainage data spatially and temporally according to different accounting scope boundaries, generate functional data tables that meet the analysis requirements, and transmit the functional data tables to the multidimensional data algorithm analysis module. The multidimensional data algorithm analysis module is used to perform calculations on the influent / effluent water volume and quality data of urban sewage treatment plants, the influent water volume and quality data of industrial enterprises and other pollution sources, the water volume and quality data of rainwater discharge outlets, the correlation calculation of rainfall, the statistics of urban water consumption, the statistics of urban area land use types, and transmit the calculation results to the business management and application module. The business management and application module is used to generate an inventory of urban domestic water pollution sources, simultaneously broadcast daily / monthly / quarterly / annual operation data of urban sewage treatment plants, and provide graphic and textual warnings for six types of urban domestic water pollution source discharge problems.

[0026] Preferably, the six types of urban domestic water pollution sources include: The criteria for determining if the effluent from a wastewater treatment plant exceeds the emission standards are: the daily average concentration of pollutants at the wastewater treatment plant outlet, as determined by online monitoring, exceeds the limit requirements of the emission standards being implemented. The criteria for determining whether a wastewater treatment plant is overloaded are: the cumulative influent volume of the wastewater treatment plant in 24 hours exceeds the design capacity, and the operating load rate exceeds 100%. During rainfall, there is significant rainwater infiltration into the sewage pipe network. The criteria for judgment are: the daily influent volume and influent pollutant concentration of the sewage treatment plant are correlated with the daily rainfall. When rainfall occurs, the influent volume is 10% higher than the average influent volume of the 15 non-rainy days prior to the rainfall day, while the influent pollutant concentration is 10% lower than the average influent pollutant concentration of the 15 non-rainy days prior to the rainfall day. The criteria for determining a decrease in the sewage collection rate are: according to the sewage collection rate calculation method, the sewage collection rate in the current month is lower than the sewage collection rate in the previous month; The criteria for determining overflow during rainfall are: on the day of rainfall, three or four of the four pollutants in the wastewater treatment plant influent—chemical oxygen demand, ammonia nitrogen, total nitrogen, and total phosphorus—are lower than the average of the 15 non-rainy days prior to the rainfall. The results of manual and online monitoring have large discrepancies. The judgment standard is that the pollutant concentration in the effluent of the sewage treatment plant is 20% lower than that in the online monitoring.

[0027] The present invention discloses the following technical effects: ① A method for compiling an inventory of urban domestic water pollution sources is proposed, which includes not only point source emissions but also non-point source emissions such as rainwater and sewage overflows and seepage from damage.

[0028] ②Quantification schemes are provided for key parameters in the discharge calculation, such as sewage collection rate, rainwater overflow, rainwater runoff volume and concentration, to reduce the error caused by the coefficient method of estimation.

[0029] ③ The system platform was used to optimize the compilation method and dynamic updating of the urban domestic water pollution source inventory.

[0030] ④ It has realized the application of compiling an inventory of urban living sources, and supported the daily management of regulatory departments with a list-style graphic warning of key issues.

[0031] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram illustrating the calculation principle of a method and embodiment for compiling and intelligently monitoring urban domestic water pollution source discharge inventories according to the present invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Example like Figure 1 As shown, the intelligent supervision platform includes a data acquisition module, a data cleaning module, a data integration module, a multi-dimensional data algorithm analysis module, and a business management and application module. The data acquisition module is used to collect urban water supply and drainage related data of cities, counties, and towns within the area to be analyzed, and transmit it to the data cleaning module. The urban water supply and drainage related data includes GIS data on the distribution of water users in the water supply departments of cities, counties, and towns within the area, water consumption statistics and water fee collection data of each water user, automatic monitoring data on the influent and effluent flow and pollutant concentration of urban sewage treatment plants, automatic monitoring data on the flow and pollutant concentration of industrial wastewater discharged into the sewer system, automatic monitoring data on the flow and pollutant concentration of wastewater discharged into the sewer system from other pollution sources, GIS data of stormwater and sewage pipe networks, surface water monitoring data, automatic monitoring data on the flow and pollutant concentration of stormwater discharge outlets, and vector data of urban area land use type survey. The data cleaning module is used to audit and verify urban water supply and drainage related data, process and clean erroneous and abnormal data, obtain cleaned urban water supply and drainage related data, and transmit the cleaned urban water supply and drainage related data to the data integration module. The data integration module is used to intelligently integrate the cleaned urban water supply and drainage related data, match the water supply and drainage data spatially and temporally according to different accounting scope boundaries, generate functional data tables that meet the analysis requirements, and transmit the functional data tables to the multidimensional data algorithm analysis module. The multidimensional data algorithm analysis module is used to perform calculations on the influent / effluent water volume and quality data of urban sewage treatment plants, the influent water volume and quality data of industrial enterprises and other pollution sources, the water volume and quality data of rainwater discharge outlets, the correlation calculation of rainfall, the statistics of urban water consumption, the statistics of urban area land use types, and transmit the calculation results to the business management and application module. The business management and application module is used to generate an inventory of urban domestic water pollution sources, simultaneously broadcast daily / monthly / quarterly / annual operation data of urban sewage treatment plants, and provide graphic and textual warnings for six types of urban domestic water pollution source discharge problems.

[0037] The six categories of urban domestic water pollution sources include: The criteria for determining if the effluent from a wastewater treatment plant exceeds the emission standard are: the daily average concentration of pollutants at the wastewater treatment plant outlet, as determined by online monitoring, exceeds the limit of the emission standard being enforced; the warning message will display "On **date, the daily average concentration of pollutants in the effluent from **wastewater treatment plant was **mg / L, exceeding the **emission standard limit of **mg / L", and the image will show the daily average concentration of pollutants in the wastewater treatment plant effluent and the emission standard limit, which are dynamically updated daily.

[0038] The wastewater treatment plant is overloaded. The criteria for judgment are: the cumulative influent volume of the wastewater treatment plant in 24 hours exceeds the design capacity, and the operating load rate exceeds 100%. The warning information shows "On ** year ** month ** day, the rainfall was ** millimeters, the rainfall level was ** (light rain / moderate rain / heavy rain / torrential rain / extreme torrential rain), the daily treatment capacity of ** wastewater treatment plant was ** cubic meters, the operating load was **, and it is in an overloaded operating state". The graphic shows the wastewater treatment plant's influent volume and treatment capacity, which are dynamically updated daily.

[0039] During rainfall, there is significant rainwater infiltration into the sewage pipe network. The criteria for judgment are: the daily influent volume and influent pollutant concentration of the sewage treatment plant are correlated with the daily rainfall. When rainfall occurs, the influent volume is 10% higher than the average influent volume of the 15 non-rainy days prior to the rainfall day, while the influent pollutant concentration is 10% lower than the average influent pollutant concentration of the 15 non-rainy days prior to the rainfall day. The warning information shows "**Year**Month**Day, Rainfall**mm, Rainfall level** (Light Rain / Moderate Rain / Heavy Rain / Rainstorm / Heavy Rainstorm / Extraordinary Rainstorm), **Sewage Treatment Plant Influent Volume**m³, higher than the average influent volume of the 15 non-rainy days prior to the rainfall day**; Influent pollutant concentration**mg / L, lower than the average influent pollutant concentration of the 15 non-rainy days prior to the rainfall day**%", and the graphic shows the sewage treatment plant influent volume, influent pollutant concentration, and rainfall dynamically updated daily.

[0040] The sewage collection rate has decreased. The criteria for judgment are: according to the sewage collection rate calculation method, the sewage collection rate in the current month is lower than the sewage collection rate in the previous month; the warning message shows "**Year**Month**, the sewage collection rate is **, lower than the sewage collection rate in the previous month**", and the graphic shows the sewage collection rate calculation results that are dynamically updated monthly.

[0041] Overflow during rainfall is determined by the following criteria: on the day of rainfall, three or four of the four pollutants in the wastewater treatment plant's influent—chemical oxygen demand (COD), ammonia nitrogen, total nitrogen, and total phosphorus—are lower than the average of the 15 non-rainy days prior to the rainfall. The warning message displays "On **date, rainfall was ** millimeters, rainfall level was ** (light rain / moderate rain / heavy rain / torrential rain / extreme torrential rain), the pollutant levels in the **wastewater treatment plant's influent were lower than on non-rainy days**, and an overflow occurred in the upstream pipeline network with an overflow volume of approximately **". The image shows the daily dynamically updated pollutant levels and rainfall in the wastewater treatment plant's influent.

[0042] Significant discrepancies exist between manual and online monitoring results. The criterion for judgment is that the pollutant concentration in the effluent from the wastewater treatment plant is 20% lower than that in the online monitoring. The warning message displays "On **date, the pollutant concentration in the effluent from **wastewater treatment plant was lower than that in the online monitoring," and the image shows the daily updated manual and online monitoring results of the effluent pollutant concentration.

[0043] Based on the aforementioned intelligent supervision platform, pollution accounting is carried out using the urban built-up area of ​​a certain district in a certain city as an example.

[0044] S1. Pollution Source Classification and Data Collection: The scope of this accounting is the urban built-up area of ​​a certain district in a certain city, within which there are 3 urban sewage treatment plants with a total treatment capacity of 220,000 tons / day. The actual treated water volume in 2024 was approximately 64,003,900 tons. The accounting objects cover point source emissions (direct discharge from sewage treatment plants) and non-point source emissions (overflow on rainy days, direct discharge on sunny days, and runoff from rainwater) of urban domestic water pollution sources. There are no other water pollution sources besides domestic and industrial sources. All data are from the daily monitoring, survey statistics, and accounting results collected by the intelligent supervision platform in 2024.

[0045] S2. Point Source Emission Calculation: Point source emissions refer to the direct pollutant discharge from the three wastewater treatment plants into the environmental water bodies through their river discharge outlets. The calculation is based on the annual treated water volume and the average effluent concentration, and the results are shown in the table below:

[0046] S3. Calculation of area source emissions. Area source emissions include three categories: rainwater overflow, direct discharge on sunny days, and rainwater runoff. The specific calculation process and results are as follows: (1) Calculation of overflow during rainy days Based on the average total amount of pollutants in the wastewater treatment plant over the 15 consecutive non-rainy days prior to rainfall, and combined with the daily rainfall and pollutant volume in 2024, overflow events during rainy days were determined, and the annual overflow volume of the upstream pipeline network of the three wastewater treatment plants was calculated. The results are as follows: chemical oxygen demand (COD) rainy day overflow volume is 1.44 million tons, ammonia nitrogen (NH3-N) rainy day overflow volume is 112,800 tons, total phosphorus (TP) rainy day overflow volume is 13,300 tons, and total nitrogen (TN) rainy day overflow volume is 117,900 tons.

[0047] (2) Calculation of direct discharge volume on sunny days The amount of direct discharge on sunny days is obtained by subtracting the overflow from the amount of sewage discharged on rainy days from the total amount of sewage discharged that was not collected by the urban sewage pipe network.

[0048] Total uncollected discharge of urban sewage = Urban domestic sewage generation × (1 - sewage collection rate) × Urban domestic sewage baseline concentration Urban domestic sewage generation = Urban domestic water consumption × Sewage generation coefficient Given that the urban domestic water consumption is 85.7112 million tons and the sewage generation coefficient is 0.85, the urban domestic sewage generation is 72.8545 million tons.

[0049] Wastewater collection rate = (Total collected volume / Total generated volume) × 100% Total generation = Total urban domestic pollutants discharged into the sewer system + Total industrial pollutants discharged into the sewer system Total urban domestic pollutants discharged into the sewer system = Amount of domestic sewage generated × Background concentration The background concentration of urban domestic sewage is taken as the maximum of the following three: a weighted average of the discharge concentrations from typical residential, commercial, educational, cultural, health, and institutional wastewater dischargers in urban areas; the highest monthly influent pollutant concentration of urban sewage treatment plants with less than 5% of their wastewater discharged into the sewer system, or the highest influent pollutant concentration of urban sewage treatment plants during the Spring Festival; as listed below.

[0050] Based on the table above, the total amount of urban domestic pollutants discharged into the sewer system is calculated as follows: COD: 7285.45 × 490.90 × 10 -2 ≈ 35764.27 tons NH3-N: 7285.45 × 50.41 × 10 -2 ≈ 3672.60 tons TP: 7285.45 × 7.03 × 10 -2 ≈ 512.16 tons TN: 7285.45 × 66.55 × 10 -2 ≈ 4848.47 tons Given the total amount of pollutants discharged into the sewer system from industrial enterprises: COD = 210.05 tons, NH3-N = 16.85 tons, TP = 2.11 tons, TN = 50.64 tons, calculate the total generation as follows: COD: 35764.27 + 210.05 = 35974.32 tons NH3-N: 3672.60 + 16.85 = 3689.45 tons TP: 512.16 + 2.11 = 514.27 tons TN: 4848.47 + 50.64 = 4899.11 tons Total collection volume = Total pollutants at the wastewater treatment plant inlet × (1 + pipe network degradation rate) — Total pollutants carried by external water infiltration The known pollutant quantities in the wastewater treatment plant's influent are: COD = 20473.72 tons, NH3-N = 1994.64 tons, TP = 241.23 tons, TN = 2501.70 tons. Pipeline degradation rates: COD=18.8%, NH3-N=3.4%, TP=15.2%, TN=15.2%. External water infiltration carrying capacity: COD = 112.40 tons, NH3-N = 2.23 tons, TP = 0.59 tons, TN = 16.29 tons The total collection volume is calculated as follows: COD: 20473.72×(1+18.8%)—112.40 ≈24210.38 tons NH3-N: 1994.64 × (1 + 3.4%) - 2.23 ≈ 2060.23 tons TP: 241.23 × (1 + 15.2%) - 0.59 ≈ 277.30 tons TN: 2501.70 × (1 + 15.2%) - 16.29 ≈ 2865.67 tons Normalized wastewater collection rate = (Normalized total collection volume / Normalized total production volume) × 100% Normalized total collection volume = Pollutant quantity (tons) / Pollution equivalent value (tons) The normalization results are calculated as follows:

[0051] According to the table above, the sewage collection rate is approximately 64.54% (31476.96 ÷ 48767.10) × 100%. Given: Domestic sewage production = 72.8545 million tons, collection rate = 64.54%, baseline concentrations: COD = 490.90 mg / L, NH3-N = 50.41 mg / L, TP = 7.03 mg / L, TN = 66.55 mg / L The total uncollected emissions, calculated by pollutant, are as follows: COD: 7285.45 × (1-0.6454) × 490.90 × 10 -2 ≈12369.25 tons NH3-N: 7285.45 × (1-0.6454) × 50.41 × 10 -2 ≈1270.18 tons TP: 7285.45 × (1-0.6454) × 7.03 × 10 -2 ≈ 177.14 tons TN: 7285.45 × (1-0.6454) × 66.55 × 10 -2 ≈ 1676.87 tons Based on the above results, the direct emissions on sunny days can be calculated as follows: COD: 12369.25 - 144.00 = 12225.25 tons NH3-N: 1270.18 - 11.28 = 1258.90 tons TP: 177.14 - 1.33 = 175.81 tons TN: 1676.87 - 11.79 = 1665.08 tons (3) Calculation of rainwater runoff scour volume Calculate the stormwater runoff scour rate using the following formula:

[0052] Land area S k Rainfall P, average runoff concentration (EMC) of a certain land use plot during a single rainfall event. k The runoff coefficient J of a certain land use plot kFor known quantities, specifically: According to the survey, the EMC concentrations of chemical oxygen demand (COD), ammonia nitrogen, total phosphorus, and total nitrogen in the calculation area are 348.98 mg / L, 2.33 mg / L, 1.07 mg / L, and 3.265 mg / L, respectively; in the commercial area, they are 224.43 mg / L, 3.11 mg / L, 1.15 mg / L, and 3.625 mg / L, respectively; in the residential area, they are 108.38 mg / L, 1.63 mg / L, 0.57 mg / L, and 2.295 mg / L, respectively; and in the educational area, they are 42.6 mg / L, 1.61 mg / L, 0.14 mg / L, and 4.8 mg / L, respectively. The transportation zone, commercial zone, residential zone, and educational zone cover areas of 50.48 square kilometers, 17.71 square kilometers, 96.56 square kilometers, and 25.72 square kilometers, respectively, with runoff coefficients of 0.65, 0.8, 0.6, and 0.5. The annual runoff volume is 1009.5 millimeters. The chemical oxygen demand (COD), ammonia nitrogen, total phosphorus, and total nitrogen emissions from rainwater runoff are 21660.05 tons, 237.88 tons, 87.04 tons, and 356.52 tons, respectively.

[0053] The calculation results are shown in the table below:

[0054] Based on the combined results of rainwater overflow, direct discharge on sunny days, and rainwater runoff, the area source emission results for different pollutants are as follows: COD: 144.00 + 12225.25 + 21660.05 = 34029.30 tons NH3-N: 11.28 + 1258.90 + 237.88 = 1508.06 tons TP: 1.33 + 175.81 + 87.04 = 264.18 tons TN: 11.79 + 1665.08 + 356.52 = 2033.39 tons S4. Results Summary: Based on the calculation results of S1-S3, the following table summarizes the results:

[0055] The remaining technical features in the above embodiments can be flexibly selected by those skilled in the art to meet different specific practical needs. However, it is obvious to those skilled in the art that these specific details are not necessary to implement the present invention. In other instances, to avoid obscuring the present invention, well-known components, structures, or parts are not specifically described, and all are within the scope of technical protection defined by the claims of the present invention.

[0056] Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this invention should be within the protection scope of the appended claims. In the above description, numerous specific details have been set forth to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other instances, to avoid obscuring the invention, well-known techniques, such as specific construction details, operating conditions, and other technical conditions, have not been specifically described.

[0057] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for compiling and intelligently supervising the discharge list of urban domestic water pollution sources, characterized in that, The steps are as follows: S1, pollution source classification and data collection: taking the administrative region of city, county, etc. or the service range of urban sewage treatment plant as a unit, the urban domestic water pollution sources in the area to be analyzed are divided into point source emission and non-point source emission, and the urban water supply and drainage related data are collected through the intelligent supervision platform; S2, point source emission calculation through the intelligent supervision platform, point source emission is the direct discharge of urban sewage treatment plant to the environment through the river discharge outlet, based on the daily monitoring of the effluent quantity and the concentration of chemical oxygen demand, ammonia nitrogen, total nitrogen and total phosphorus of the urban sewage treatment plant, the pollutant emission quantity of the river discharge outlet is obtained by direct calculation; S3, non-point source emission calculation through the intelligent supervision platform, including: Rainy day overflow, taking the average value of total pollutant quantity of sewage treatment plant in the last 15 consecutive non-rainy days before the occurrence of rainfall as the basis, when at least three of the four indicators of chemical oxygen demand, ammonia nitrogen, total nitrogen and total phosphorus in the total pollutant quantity of the inlet water on the rainy day are lower than the basis value, it is determined that rain day overflow occurs, and the difference between the basis value and the actual total inlet water quantity is counted into the rain day overflow; The amount of direct discharge in sunny days is obtained by deducting the rain day overflow from the total discharge amount of the urban sewage pipe network which is not collected; Rainfall runoff scouring amount is calculated based on the runoff coefficient of different urban land types and the average concentration EMC of secondary rainfall runoff combined with rainfall data; S4, based on the urban water supply and drainage related data collected in S1 and the calculation results of S2-S3, the intelligent supervision platform is used to automatically generate the urban domestic water pollution source emission list, the urban sewage treatment plant operation data daily / monthly / quarterly / annual report, and the graphic and text warning of the six types of urban domestic water pollution source emission problems.

2. The urban domestic water pollution source emission inventory compiling and intelligent supervision method according to claim 1, characterized in that: The total discharge amount of the urban sewage pipe network which is not collected is calculated as follows: ； ； The calculation method of sewage collection rate is as follows: taking chemical oxygen demand, ammonia nitrogen and total phosphorus as accounting factors, the total collection amount and the total production amount of each accounting factor are calculated respectively, and then the normalized values of the total collection amount and the total production amount of each accounting factor are added respectively, the pollution equivalent value of chemical oxygen demand is 1 kg, the pollution equivalent value of ammonia nitrogen is 0.8 kg, and the pollution equivalent value of total phosphorus is 0.25 kg, the calculation formula is as follows: 。 3. The urban domestic water pollution source emission inventory compiling and intelligent supervision method according to claim 2, characterized in that: The total collection amount of the accounting factor is calculated according to the following formula: ； Wherein, the total pollutant quantity of the urban sewage treatment plant inlet is obtained by statistical accounting of the urban sewage treatment plant inlet water quality and quantity monitoring data; the pipe network degradation coefficient refers to the value of the degradation rate of septic tank to pollutants in the first national pollution source census or the local measured value; the infiltration pollutant concentration of external water is the average value of the pollutant concentration of the surface water monitoring section, and the total amount of carried pollutants is calculated according to the following formula: 。 4. The urban domestic water pollution source emission inventory compiling and intelligent supervision method according to claim 3, characterized in that: The total production amount of the accounting factor is calculated according to the following formula: ； ； The background concentration of urban domestic sewage is the maximum value of the following three: the weighted average of the survey value of the concentration of the drainage of the urban area typical residential, commercial service, science and education, health and welfare and government and organization; the maximum monthly inlet water pollutant concentration of the urban sewage treatment plant or the maximum inlet water pollutant concentration of the urban sewage treatment plant during the Spring Festival when the proportion of industrial wastewater quantity is less than 5%. The total amount of pollutants of industrial enterprises is calculated by monitoring data of water quality and water quantity of industrial enterprise wastewater drainage outlets.

5. The urban domestic water pollution source emission inventory compiling and intelligent supervision method according to claim 4, characterized in that: The rainwater runoff scouring amount is calculated according to the following formula: The automatic monitoring facilities are arranged at the rainwater drainage outlets of the different land use property plots in the typical town area. When it rains, the runoff is formed from the rainwater drainage outlet, and the sampling is carried out once every 5 minutes within the first 30 minutes, once every 15 minutes within 30-60 minutes, and once every 30 minutes thereafter until the runoff stops, so as to obtain the flow and pollutant concentration data of the different land use property plots. Then, the minute scale rainfall data measured by the rain gauge are used for weighted average, so as to calculate the runoff coefficient and EMC concentration of the different land use property plots. In combination with the area statistics of the different land use property plots in the whole town area, the rainwater runoff pollution scouring discharge amount is calculated.

6. The urban domestic water pollution source emission inventory compiling and intelligent supervision method according to claim 5, characterized in that: The intelligent supervision platform comprises a data acquisition module, a data cleaning module, a data integration module, a multi-dimensional data algorithm analysis module and a business management and application module, specifically comprising: The data acquisition module is used for acquiring urban, county and town water supply and drainage related data in a region to be analyzed, and transmitting the data to the data cleaning module. The urban, county and town water supply and drainage related data comprises water user distribution GIS data of water supply departments in the region, water consumption statistics and water fee collection data of each water user, automatic monitoring data of water quantity and pollutant concentration of water inlet and outlet of a town sewage treatment plant, automatic monitoring data of water quantity and pollutant concentration of industrial wastewater, automatic monitoring data of water quantity and pollutant concentration of wastewater of other pollution sources, rainwater and sewage pipe network GIS data, surface water monitoring data, automatic monitoring data of water quantity and pollutant concentration of rainwater drainage outlets, and town area land use type investigation vector data. The data cleaning module is used for data auditing and checking of the urban, county and town water supply and drainage related data, and processing and cleaning of error data and abnormal data, so as to obtain cleaned urban, county and town water supply and drainage related data. The data integration module is used for intelligent integration of the cleaned urban, county and town water supply and drainage related data, spatial and temporal matching of water supply and drainage data according to different accounting range boundaries, generation of a functional data table meeting the analysis requirements, and transmission of the functional data table to the multi-dimensional data algorithm analysis module. The multi-dimensional data algorithm analysis module is used for calculation of water quantity and quality data of water inlet and outlet of a town sewage treatment plant, calculation of water quantity and quality data of industrial enterprises and other pollution sources, calculation of water quantity and quality data of rainwater drainage outlets, rainfall correlation calculation, town water consumption statistics, and town area land use type statistics, and transmission of the calculation results to the business management and application module. The business management and application module is used for generating a town domestic water pollution source discharge list, synchronously realizing daily / monthly / quarterly / yearly reporting of town sewage treatment plant operation data, and realizing a graphic and text warning function of six types of town domestic water pollution source discharge problems.

7. The urban domestic water pollution source emission inventory compiling and intelligent supervision method according to claim 6, characterized in that: The six types of town domestic water pollution source discharge problems comprise: The effluent of the sewage treatment plant exceeds the standard, and the judgment standard is that the daily average value of the online monitoring of the pollutant concentration at the outlet of the sewage treatment plant exceeds the limit value of the implemented emission standard; The sewage treatment plant is overloaded, and the judgment standard is that the cumulative value of the 24-hour inflow water quantity of the sewage treatment plant exceeds the design scale, and the operation load rate exceeds 100%; There is obvious rainwater infiltration into the sewage pipe network during rainfall, and the judgment standard is that the daily inflow quantity and pollutant concentration of the sewage treatment plant are related to the daily rainfall quantity. When rainfall occurs, the inflow quantity is 10% higher than the average inflow quantity of the previous 15 non-rainfall days, and the inflow pollutant concentration is 10% lower than the average inflow pollutant concentration of the previous 15 non-rainfall days; The sewage collection rate decreases, and the judgment standard is that according to the calculation method of the sewage collection rate, the sewage collection rate in the current month is lower than that in the previous month; Overflow occurs during rainfall, and the judgment standard is that three or four of the four pollutants, i.e., chemical oxygen demand, ammonia nitrogen, total nitrogen, and total phosphorus, in the inflow of the sewage treatment plant on the rainfall day are lower than the average values of the previous 15 non-rainfall days; The manual and online monitoring results have large deviations, and the judgment standard is that the pollutant concentration monitored manually at the outlet of the sewage treatment plant is 20% lower than that monitored online.

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