CN115392757B

CN115392757B - Quantitative evaluation method and device for carbon emission of town sewage treatment facility

Info

Publication number: CN115392757B
Application number: CN202211069656.XA
Authority: CN
Inventors: 陈昂; 王良友; 傅广泽
Original assignee: China Three Gorges Corp
Current assignee: China Three Gorges Corp
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2023-07-28
Anticipated expiration: 2042-08-31
Also published as: CN115392757A

Abstract

The invention discloses a quantitative evaluation method and a quantitative evaluation device for carbon emission of town sewage treatment facilities, wherein the method comprises the following steps: collecting pipe network raw data and sewage treatment plant raw data, determining pipe network collection carbon emission based on the pipe network raw data, and determining sewage treatment carbon emission and sludge treatment carbon emission based on the sewage treatment plant raw data; determining total sewage treatment carbon emission based on the pipe network collection carbon emission, the sewage treatment carbon emission and the sludge treatment carbon emission; determining the total carbon emission of the drainage area based on the total carbon emission of the sewage treatment; determining a target research area total carbon emission amount based on the drainage area total carbon emission amount; and evaluating the carbon emission of the town sewage treatment facility based on the total carbon emission of the sewage treatment, the total carbon emission of the drainage area and the total carbon emission of the target research area. The method realizes the quantitative evaluation of the carbon emission of the town sewage treatment facilities.

Description

Quantitative evaluation method and device for carbon emission of town sewage treatment facility

Technical Field

The invention relates to the technical field of carbon emission evaluation, in particular to a quantitative evaluation method and device for carbon emission of town sewage treatment facilities.

Background

The urban infrastructure is an energy intensive and carbon emission intensive project, the sewage treatment facility is an important content of urban infrastructure planning, technologies such as quantification, monitoring, collection and evaluation of carbon emission of the sewage treatment facility are focused on in the academic and industry all the time, the quantified carbon emission is a precondition for subsequent treatment, particularly after 3060 double-carbon targets are put forward, the quantification method of the carbon emission of the sewage treatment facility receives more attention, carbon emission is considered more in the construction and operation of the sewage treatment facility, and energy consumption, medicine consumption, greenhouse Gas (GHG) emission and the like of different processes of the sewage treatment facility are converted into carbon dioxide equivalent for carbon emission quantification.

However, most researches or technologies lack overall consideration, for example, in the prior art, by defining boundary conditions and calculation periods, direct carbon emission of a sewage treatment plant, indirect carbon emission of the sewage treatment plant, other carbon emission of the sewage treatment plant and carbon recovery emission of the sewage treatment plant are calculated respectively in running time, and then quantitative calculation results of carbon emission of the sewage treatment plant are obtained, and the calculation is mainly performed for carbon emission of a single sewage treatment plant; in the prior art, a comprehensive carbon emission evaluation index system of a sewage treatment plant is constructed, the obtained comprehensive carbon emission evaluation index is utilized to evaluate the carbon emission level of the sewage treatment plant, and carbon sources and carbon sinks of 4 layers such as an energy consumption layer, a resource recycling layer, a carbon sink layer and a carbon emission layer are mainly considered to calculate carbon emission; the prior art calculates the greenhouse gas emission by calculating the emission factors of energy sources, sewage treatment and medicines, the activity level of greenhouse gas emission and the emission factors thereof, solves the technical problem that the existing carbon footprint metering method is not suitable for sewage treatment plants, and has the core that the emission factors of different areas and different elements are determined; in the prior art, the net carbon emission of the sewage plant in the operation stage is calculated by considering the carbon emission and the carbon emission reduction amount of the sewage plant in the operation stage, and the net carbon emission is mainly concentrated in the sewage treatment and sludge treatment processes of the urban sewage treatment plant and the delivery treatment processes thereof, so that the carbon emission calculation content of the early-stage sewage collection is not considered.

The prior art mainly focuses on carbon emission of sewage treatment facilities such as sewage treatment plants and tail water wetlands, is insufficient in carbon emission consideration of sewage collection facilities such as pipe networks, is insufficient in carbon emission consideration of the whole processes such as sewage treatment facilities collection and treatment, is mainly focused on carbon emission monitoring and collection technologies of the sewage treatment facilities, and is less in carbon emission quantification method evaluation.

Most of the prior art lacks overall consideration, mainly focuses on carbon emission of sewage treatment facilities such as sewage treatment plants, tail water wetlands and the like, and mainly has the following defects:

firstly, the carbon emission of sewage treatment facilities such as sewage treatment plants is focused, and the carbon emission of sewage collection facilities such as pipe networks is not considered sufficiently;

(II) the carbon emission during the operation of the sewage treatment plant is focused, and the carbon emission of the whole life cycle, the whole process of the construction and the operation of sewage treatment facilities, the collection and the treatment and the like is not considered sufficiently;

(III) focusing on the carbon emission monitoring and collecting technology of the sewage treatment facility, and considering the technical shortage in the aspect of evaluating the carbon emission quantification method;

(IV) the indirect carbon emission is focused on the electric energy consumption of the sewage treatment plant, and other aspects such as oil consumption are not enough;

(V) the important attention is paid to carbon emission, namely carbon source, and less attention is paid to the effect of resources generated in the middle process of sewage treatment, such as methane power generation, on carbon emission reduction, namely carbon sink;

most of the six methods focus on carbon emission of a sewage treatment plant, carbon emission of a regional sewage treatment plant and other single-level carbon emission, and consider the defect of simultaneous quantification method of multi-level carbon emission from sewage treatment facilities such as sewage treatment plants, sewage collection and treatment facilities such as sewage treatment plants and pipe networks, sewage treatment systems composed of a plurality of sewage treatment facilities, regional sewage treatment systems and other multi-level carbon emission.

Researches show that the water resource, the energy source and the carbon emission are closely related, the water supply and drainage system is an important content of urban infrastructure, is also an energy-intensive and carbon emission-intensive project, and relates to a plurality of energy consumption and carbon emission, the energy consumption comprises equipment such as pumps, motors and the like in a pipe network, aeration equipment in a sewage treatment plant, the carbon emission consumption comprises indirect carbon emission of the energy equipment and greenhouse gas emission in each treatment process of sewage treatment; therefore, when quantifying the carbon emissions of sewage treatment facilities, the energy consumption must be fully considered to obtain more comprehensive, accurate and reliable results.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that most of the prior art lacks overall consideration when quantifying carbon emission of sewage treatment facilities and has less technology in the aspect of evaluating the carbon emission quantification method, so as to provide the urban sewage treatment facilities carbon emission quantification evaluation method and device.

The embodiment of the invention provides a quantitative evaluation method for carbon emission of town sewage treatment facilities, which comprises the following steps:

collecting pipe network raw data and sewage treatment plant raw data, determining pipe network collection carbon emission based on the pipe network raw data, and determining sewage treatment carbon emission and sludge treatment carbon emission based on the sewage treatment plant raw data;

determining total sewage treatment carbon emission based on the pipe network collection carbon emission, the sewage treatment carbon emission and the sludge treatment carbon emission;

determining the total carbon emission of the drainage area based on the total carbon emission of the sewage treatment;

determining a target research area total carbon emission amount based on the drainage area total carbon emission amount;

and evaluating the carbon emission of the town sewage treatment facility based on the total carbon emission of the sewage treatment, the total carbon emission of the drainage area and the total carbon emission of the target research area.

According to the quantitative evaluation method for carbon emission of the town sewage treatment facilities, on the basis of the carbon emission of a traditional sewage treatment plant, quantitative evaluation of carbon emission of a pipe network is added, quantitative evaluation of carbon emission of sewage collection facilities such as the pipe network is realized, the total carbon emission of sewage treatment is determined based on the collected carbon emission of the pipe network, the carbon emission of sewage treatment and the carbon emission of sludge treatment, the total carbon emission of sewage treatment is calculated, and the total carbon emission of a drainage area and the total carbon emission of a target research area are calculated, so that a sewage treatment system consisting of the sewage collection and treatment facilities such as a single sewage treatment plant, the sewage treatment plant and the pipe network, a plurality of sewage treatment facilities is realized, and the quantitative evaluation of carbon emission of the town sewage treatment facilities is realized.

Optionally, determining the pipe network collection carbon emission based on the pipe network raw data and determining the sewage treatment carbon emission and the sludge treatment carbon emission based on the sewage treatment plant raw data includes:

determining the construction carbon emission amount of the pipe network and the operation carbon emission amount of the pipe network based on the pipe network original data;

the pipe network collecting carbon emission amount is calculated according to the pipe network construction carbon emission amount and the pipe network operation carbon emission amount;

determining the construction carbon emission amount of the sewage treatment plant and the operation carbon emission amount of the sewage treatment plant based on the original data of the sewage treatment plant;

calculating the sewage treatment carbon emission according to the construction carbon emission of the sewage treatment plant and the operation carbon emission of the sewage treatment plant;

determining the fuel consumption carbon emission amount of the sludge conveyance tool based on the raw data of the sewage treatment plant, and taking the fuel consumption carbon emission amount of the sludge conveyance tool as the sludge disposal carbon emission amount.

Optionally, determining the pipe network construction carbon emission amount and the pipe network operation carbon emission amount based on the pipe network raw data includes:

extracting pipe network construction material consumption and pipe network construction material carbon content in pipe network raw data, and determining pipe network construction carbon emission based on the pipe network construction material consumption and the pipe network construction material carbon content;

Extracting pipe network operation time and pipe network electrical equipment rated power in pipe network original data, and determining pipe network operation energy consumption indirect discharge based on the pipe network operation time and the pipe network electrical equipment rated power;

and extracting pipe network dissipation direct emission in pipe network raw data, and calculating pipe network operation carbon emission based on pipe network operation energy consumption indirect emission and pipe network dissipation direct emission.

Optionally, determining the construction carbon emission amount of the sewage treatment plant and the operation carbon emission amount of the sewage treatment plant based on the sewage treatment plant raw data includes:

extracting the consumption of the construction materials of the sewage treatment plant and the carbon content of the construction materials of the sewage treatment plant in the raw data of the sewage treatment plant, and determining the construction carbon emission of the sewage treatment plant based on the consumption of the construction materials of the sewage treatment plant and the carbon content of the construction materials of the sewage treatment plant;

extracting the operation time of the electric equipment of the sewage treatment plant, the rated power of the electric equipment of the sewage treatment plant and the daily treatment capacity of the sewage treatment plant from the raw data of the sewage treatment plant, and determining the indirect discharge capacity of the operation energy consumption of the sewage treatment plant based on the operation time of the electric equipment of the sewage treatment plant, the rated power of the electric equipment of the sewage treatment plant and the daily treatment capacity of the sewage treatment plant;

Extracting chemical agent carbon content and chemical agent consumption in raw data of a sewage treatment plant, and determining chemical agent consumption indirect discharge amount based on the chemical agent carbon content, the chemical agent consumption and daily treatment amount of the sewage treatment plant;

extracting methane combustion power generation carbon emission reduction and direct emission dissipated by the sewage treatment plant from the original data of the sewage treatment plant, and calculating the operation carbon emission of the sewage treatment plant based on the operation energy consumption indirect emission, the chemical agent consumption indirect emission, the methane combustion power generation carbon emission reduction and the direct emission dissipated by the sewage treatment plant.

Optionally, determining the sludge conveyance fuel consumption carbon emission amount based on the sewage treatment plant raw data, and disposing the sludge conveyance fuel consumption carbon emission amount as the sludge disposal carbon emission amount includes:

and extracting the travel distance of the transport vehicle and the fuel efficiency of the transport vehicle in the raw data of the sewage treatment plant, and determining the sludge disposal carbon emission amount based on the travel distance of the transport vehicle and the fuel efficiency of the transport vehicle.

Optionally, determining the total amount of carbon emissions for wastewater treatment based on the pipe network collection carbon emissions, the wastewater treatment carbon emissions, and the sludge treatment carbon emissions, wherein the total amount of carbon emissions for wastewater treatment is calculated as follows:

In the above, G _{sewage_x} Represents the total carbon emission amount of sewage treatment, G _{pipe_i} Represents the carbon emission amount collected by a pipe network, G _{plant_i} Represents the carbon emission amount of sewage treatment, G _{sludge_i} Indicating the sludge positionCarbon emission is set.

Optionally, before collecting the pipe network raw data and the sewage treatment plant raw data, determining the pipe network collected carbon emission based on the pipe network raw data, and determining the sewage treatment carbon emission and the sludge treatment carbon emission based on the sewage treatment plant raw data, further comprising:

dividing a target research area to generate a drainage area and sewage treatment facilities; wherein the drainage area comprises a plurality of sewage treatment facilities, and the sewage treatment facilities comprise sewage treatment plants and pipe networks.

In a second aspect of the present application, there is also provided a town sewage treatment facility carbon emission quantitative evaluation apparatus, comprising:

the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring pipe network raw data and sewage treatment plant raw data, determining pipe network collection carbon emission based on the pipe network raw data, and determining sewage treatment carbon emission and sludge treatment carbon emission based on the sewage treatment plant raw data;

a first determining module for determining a total amount of wastewater treatment carbon emissions based on the pipe network collection carbon emissions, the wastewater treatment carbon emissions, and the sludge treatment carbon emissions;

A second determining module for determining a total carbon emission amount of the drainage area based on the total carbon emission amount of the sewage treatment;

a third determination module for determining a target study area total carbon emission amount based on the drainage area total carbon emission amount;

and the evaluation module is used for evaluating the carbon emission of the town sewage treatment facility based on the total carbon emission of the sewage treatment, the total carbon emission of the drainage area and the total carbon emission of the target research area.

Optionally, the acquisition module includes:

the first determining submodule is used for determining the construction carbon emission amount of the pipe network and the operation carbon emission amount of the pipe network based on the pipe network original data;

the first calculation submodule is used for calculating the pipe network collection carbon emission according to the pipe network construction carbon emission and the pipe network operation carbon emission;

the second determining submodule is used for determining the construction carbon emission amount of the sewage treatment plant and the operation carbon emission amount of the sewage treatment plant based on the original data of the sewage treatment plant;

the second calculation sub-module is used for calculating the sewage treatment carbon emission according to the construction carbon emission of the sewage treatment plant and the operation carbon emission of the sewage treatment plant;

and a third determination submodule for determining the fuel consumption carbon emission amount of the sludge transportation tool based on the raw data of the sewage treatment plant and taking the fuel consumption carbon emission amount of the sludge transportation tool as the sludge disposal carbon emission amount.

Optionally, the first determining submodule includes:

the first determining unit is used for extracting pipe network construction material consumption and pipe network construction material carbon content in pipe network raw data, and determining pipe network construction carbon emission based on the pipe network construction material consumption and the pipe network construction material carbon content;

the second determining unit is used for extracting the pipe network operation time and the rated power of the pipe network electrical equipment in the pipe network original data and determining the indirect emission of the pipe network operation energy consumption based on the pipe network operation time and the rated power of the pipe network electrical equipment;

and the third determining unit is used for extracting pipe network dissipation direct emission in pipe network raw data, and calculating pipe network operation carbon emission based on pipe network operation energy consumption indirect emission and pipe network dissipation direct emission.

Optionally, the second determining sub-module comprises:

a fourth determining unit for extracting the consumption of the construction materials of the sewage treatment plant and the carbon content of the construction materials of the sewage treatment plant in the raw data of the sewage treatment plant, and determining the discharge amount of the construction carbon of the sewage treatment plant based on the consumption of the construction materials of the sewage treatment plant and the carbon content of the construction materials of the sewage treatment plant;

a fifth determining unit, configured to extract a sewage treatment plant electric equipment operation time, a sewage treatment plant electric equipment rated power and a sewage treatment plant daily throughput from the sewage treatment plant raw data, and determine an indirect discharge amount of operation energy consumption of the sewage treatment plant based on the sewage treatment plant electric equipment operation time, the sewage treatment plant electric equipment rated power and the sewage treatment plant daily throughput;

A sixth determining unit for extracting a chemical agent carbon content and a chemical agent consumption amount in raw data of the sewage treatment plant, and determining an indirect discharge amount of the chemical agent consumption based on the chemical agent carbon content, the chemical agent consumption amount, and a daily treatment amount of the sewage treatment plant;

the seventh determining unit is used for extracting methane combustion power generation carbon emission reduction and direct emission dissipated by the sewage treatment plant from the original data of the sewage treatment plant, and calculating the operation carbon emission of the sewage treatment plant based on the operation energy consumption indirect emission, the chemical agent consumption indirect emission, the methane combustion power generation carbon emission reduction and the direct emission dissipated by the sewage treatment plant.

Optionally, the third determining submodule is further used for extracting the running distance of the transportation vehicle and the fuel efficiency of the transportation vehicle in the raw data of the sewage treatment plant, and determining the sludge disposal carbon emission amount based on the running distance of the transportation vehicle and the fuel efficiency of the transportation vehicle.

Alternatively, the calculation formula of the total carbon emission amount of the sewage treatment is as follows:

in the above, G _{sewage_x} Represents the total carbon emission amount of sewage treatment, G _{pipe_i} Represents the carbon emission amount collected by a pipe network, G _{plant_i} Represents the carbon emission amount of sewage treatment, G _{sludge_i} Represents the sludge disposal carbon emissions.

Optionally, the method further comprises:

In a third aspect of the present application, there is also provided a computer device comprising a processor and a memory, wherein the memory is for storing a computer program, the computer program comprising a program, the processor being configured to invoke the computer program to perform the method of the first aspect described above.

In a fourth aspect of the present application, embodiments of the present invention provide a computer-readable storage medium storing a computer program for execution by a processor to implement the method of the first aspect described above.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a quantitative evaluation method for carbon emission of town sewage treatment facilities in embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of a quantitative evaluation model of carbon emission of town sewage treatment facilities in example 1 of the present invention;

FIG. 3 is a flowchart of step S101 in embodiment 1 of the present invention;

FIG. 4 is a flowchart of step S1011 in embodiment 1 of the present invention;

fig. 5 is a flowchart of step S1013 in embodiment 1 of the present invention;

FIG. 6 is a schematic block diagram of a quantitative evaluation device for carbon emission of town sewage treatment facilities in example 2 of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1

The embodiment provides a quantitative evaluation method for carbon emission of town sewage treatment facilities, as shown in fig. 1, comprising:

s101, collecting pipe network original data and sewage treatment plant original data, determining pipe network collection carbon emission based on the pipe network original data, and determining sewage treatment carbon emission and sludge treatment carbon emission based on the sewage treatment plant original data.

Specifically, dividing a target research area to generate a drainage area and sewage treatment facilities; wherein, above-mentioned drainage zone includes a plurality of sewage treatment facilities, and sewage treatment facilities includes sewage treatment plant and pipe network.

Further, dividing the target research area into a plurality of drainage areas and a plurality of sewage treatment systems according to three levels, performing carbon emission calculation steps for forming 3 levels of the target research area (first level), the drainage area (second level), the sewage treatment system (third level) and the like, performing independent analysis and calculation on each sewage treatment system and each drainage area, and gradually summarizing the results to finally obtain three levels of carbon emission values; the target research area is a target town area or a partial area to be evaluated or calculated; the water drainage area is divided into a plurality of units according to administrative division or sewage collection treatment relation, and the general towns are sewage treatment systems designed and built according to the administrative division, so that the water drainage area units can be formed by dividing the target study area according to the administrative division, and part of towns are relatively complicated in sewage treatment systems, the sewage treatment systems are not designed and built according to the administrative division, and the water drainage area units can be determined by consulting town planning data; the sewage treatment facility is integrated with a system for collecting and treating sewage in each drainage area, and mainly comprises sewage treatment plants and a pipe network, wherein the sewage treatment facility possibly comprises a plurality of sewage treatment plants and pipe networks for collecting sewage, so that each drainage area is divided into a plurality of sewage treatment systems, each sewage treatment system comprises sewage treatment facilities such as the sewage treatment plants and the pipe networks, the number of sewage treatment system units corresponding to each drainage area is determined according to the sewage collection relation of the sewage treatment plants and the pipe networks, and the sewage treatment system data is collected.

Further, basic data of a target research area, a drainage area and sewage treatment facilities are collected; the basic data of the target research area comprise data such as the area of the target research area, population, the number of sewage treatment plants, the length of a pipe network, area planning and the like; the basic data of the drainage areas comprise the number of the drainage areas, the area of each drainage area, the number of sewage treatment systems of each drainage area, related data, the relation data of sewage treatment plants and pipe networks and the like; the basic data of the sewage treatment facility comprise pipe network raw data, sewage treatment plant raw data and the like.

Further, the pipe network original data can be divided into pipe network construction data, pipe network operation data and the like according to the life cycle; the pipe network construction data mainly comprise pipe network length, aperture, construction material and the like, and can be obtained through town planning data or sewage treatment plants and pipe network design data, so that the carbon emission of pipe network construction can be calculated according to the pipe network length, aperture and construction material type, and the unit energy consumption, pipe network construction material density and carbon content in the material in the pipe network construction material manufacturing process can be obtained through consulting documents; the pipe network operation data mainly comprise pipe network operation time, pipe network electrical equipment and energy consumption thereof, dissipated carbon emission of pipe network operation and the like, the pipe network operation time can be obtained through real-time operation records, the pipe network electrical equipment and the energy consumption thereof can be obtained through calculation through design data, the pipe network operation time, the pipe network length, the aperture and the like according to rated power, operation time, pipe network length, the like of the main electrical equipment of the pipe network, the dissipated carbon emission of pipe network operation can be obtained through monitoring.

Further, sewage treatment plant data can be divided into sewage treatment plant construction data, sewage treatment plant operation data and the like according to life cycle; the sewage treatment plant construction data mainly comprise sewage treatment plant construction materials, design scale, water inlet and outlet characteristics and the like; the operation data of the sewage treatment plant mainly comprise electric energy consumption, operation time, daily treatment capacity, water inlet and outlet characteristics, chemical agent consumption, biogas production capacity in a biochemical process, carbon emission capacity dissipation, sludge transportation energy consumption and the like of various electric equipment of the sewage treatment plant, the main data of the sewage treatment plant can be directly collected and obtained from operation records of the sewage treatment plant, the electric energy consumption of the sewage treatment plant can be obtained by collecting and calculating related data from the operation records of the sewage treatment plant, the electric energy consumption of the sewage treatment plant can be obtained by calculating the rated power, the operation time, the treatment capacity and the like of the main electric equipment of the sewage treatment plant, and the like, and in order to obtain relatively objective and scientific calculation results, the data values of the operation time and the treatment capacity of the sewage treatment plant are set to take average values in a period of 6 months or more, and the water inlet and outlet characteristics of the sewage treatment plant such as BOD (Biochemical oxygen demand ) and the like of the sewage treatment plant can be used for calculating greenhouse gas emission; the sludge transportation energy consumption is mainly the fuel energy consumption of a transportation vehicle, related fuel consumption such as fuel oil data can be collected from a vehicle use record or a driver, the fuel consumption is converted into equivalent electric energy consumption according to an oil-electricity conversion coefficient, the value of the oil-electricity conversion coefficient is set to 15.64kWh/L (kilowatt-hour/liter), and in the same way, other fuel consumption in a sewage treatment plant can also be converted into electric energy consumption according to the oil-electricity conversion coefficient to carry out carbon emission calculation, chemical agent consumption data of the sewage treatment plant can be collected through an operation record of the sewage treatment plant, and mainly the consumption data of different chemical agents and various chemical agents are shown in the following table 1.

Table 1:

specifically, the carbon emissions of town sewage treatment facilities are classified into 2 types, including direct emissionsAnd indirect emission, by taking into account the energy consumption (kWh/m of the corresponding process ³ Indirect emission of greenhouse gases (kg CO) corresponding to kilowatt-hours per cubic meter ₂ eq/m ³ Kilogram carbon dioxide equivalent per cubic meter), direct emission of greenhouse gases of the corresponding process, and corresponding carbon emission reduction; firstly, calculating each energy consumption, then calculating corresponding carbon emission, namely adding greenhouse gas emission in each process, converting the carbon emission into carbon emission, and summing the carbon emission and the carbon emission to calculate; the direct emission is greenhouse gas emission generated by sewage treatment facilities directly, and comprises greenhouse gas emission in the sewage treatment process and greenhouse gas emission generated by methane combustion in the biochemical treatment process; the indirect emission is greenhouse gas emission corresponding to energy consumption of the related process of the sewage treatment facility, and is mainly carbon emission of energy consumption of construction materials, chemical agents required by operation and the like of the sewage treatment facility.

Further, the greenhouse gas indirect emission is mainly greenhouse gas emission corresponding to energy consumption in different processes, and the energy sources mainly comprise 4 kinds of electric energy, fuel, construction materials, chemical agents and the like, and the specific table 2 is shown as follows:

Table 2:

Source	description of the invention	Energy consumption	Greenhouse gas emissions
				Electric energy	Pumps, motors, aeration apparatus, or the like	E _L	G _L
Fuel and its production process	Truck fuel for transporting sludge	E _d	G _d
				Construction material	Sewage treatment facility construction material	E _mt	G _mt
Chemical agent	Chemical agent for sewage treatment facility operation	E _ch	G _ch

Further, in order to accurately quantify carbon emissions, the service life of the concrete structure is set to be 50 years, and the service life of other materials such as steel is set to be 15 years.

It should be noted that the above energy is a broad energy concept, and includes various primary energy sources, secondary energy sources, and various energy sources for reducing the consumption of resources, and various resources include construction materials of construction stage, medicines of operation stage, etc., for example, various energy sources and materials required for construction stage of sewage treatment plant, energy sources required for operation stage of sewage treatment plant, for example, electric energy, diesel oil, and various medicine consumption resources required for operation stage of sewage treatment plant, for example, chemicals.

Further, the direct emission sources of greenhouse gases in different processes mainly comprise 1 kind of dissipated carbon emission of a sewage collecting system and a sewage treatment system; the emission of carbon is estimated indirectly according to the degradation rate of organic matters in a pipe network, and the specific estimation steps are as follows: firstly, selecting a pipe network, and determining pump stations adjacent to two ends of the pipe network; then, monitoring the BOD concentration value of each pump station, and setting 5 parallel samples to be continuously taken to eliminate errors; and finally, calculating the difference value (sampling root average value) of BOD concentration values between the two pump stations and dividing the difference value by the length of the pipe network to obtain the BOD degradation rate of the pipe network per kilometer, wherein 50% of the degradation BOD is greenhouse gas emission, namely carbon emission dissipation.

Further, the greenhouse gas carbon emission reduction sources in different processes mainly are carbon emissions generated by biogas combustion power generation generated by biochemical treatment of sewage treatment plants, and whether the biogas is directly used for power generation or not, certain carbon is contained in the biogas, so the biogas is considered as a carbon emission item; the electric energy generated by methane power generation can be taken into consideration in the carbon emission reduction calculation range and used as a carbon emission reduction item.

S102, determining total sewage treatment carbon emission based on the pipe network collection carbon emission, the sewage treatment carbon emission and the sludge treatment carbon emission.

Wherein, the calculation formula of the total carbon emission amount of the sewage treatment is as follows:

in the above, G _{sewage_x} Represents the total amount of carbon emissions of sewage treatment (i-th sewage treatment facility), G _{pipe_i} Represents (i-th sewage treatment facility) the carbon emission amount collected by the pipe network, G _{plant_i} Represents (i-th sewage treatment facility) sewage treatment carbon emission amount, G _{sludge_i} Represents (i-th sewage treatment facility) sludge disposal carbon emission amount, G _{pipe_construction_i} Represents the carbon emission amount of pipe network construction (i-th sewage treatment facility), G _{pipe_operation_i} Represents the carbon emission of the operation of the pipe network (i-th sewage treatment facility), G _{plant_construction_i} Represents the construction carbon emission amount of a sewage treatment plant (i-th sewage treatment facility), G _{plant_operation_i} Represents the operating carbon emission amount of a sewage treatment plant (i-th sewage treatment facility), G _{sludge_i} Represents (i-th sewage treatment facility) the sludge disposal carbon emission amount.

S103, determining the total carbon emission amount of the drainage area based on the total carbon emission amount of the sewage treatment.

Wherein, the total carbon emission calculation is carried out on a plurality of sewage treatment settings in the drainage area, and the total carbon emission G of the drainage area m _{drain_m} The calculation formula of (2) is as follows:

and S104, determining the total carbon emission of the target research area based on the total carbon emission of the drainage area.

Wherein, the total carbon emission is calculated for a plurality of drainage areas in the target research area, and the total carbon emission G of the target research area _urban The calculation formula of (2) is as follows:

s105, evaluating the carbon emission of the town sewage treatment facility based on the total carbon emission of the sewage treatment, the total carbon emission of the drainage area and the total carbon emission of the target research area.

As shown in fig. 2, the carbon emission evaluation of the town sewage treatment facility is mainly performed based on mass balance and life cycle theoretical models, carbon emission calculation is performed based on greenhouse gas emission in the whole process of sewage collection, sewage treatment and sludge treatment, including sewage collection carbon emission, sewage treatment carbon emission and sludge treatment carbon emission, and further, the total carbon emission of a drainage area and the total carbon emission of a target research area are calculated, and the total carbon emission of the sewage treatment, the total carbon emission of the drainage area and the total carbon emission of the target research area are used as the evaluation results of the carbon emission of the town sewage treatment facility.

According to the quantitative evaluation method for carbon emission of the town sewage treatment facility, on the basis of the carbon emission of a traditional sewage treatment plant, quantitative evaluation of carbon emission of a pipeline network is added, quantitative evaluation of carbon emission of sewage collection facilities such as a pipeline network is realized, total carbon emission of sewage treatment is determined based on the collected carbon emission of the pipeline network, the carbon emission of sewage treatment and the carbon emission of sludge treatment, and then the total carbon emission of sewage treatment, the total carbon emission of a drainage area and the total carbon emission of a target research area are calculated, and a sewage treatment system consisting of the sewage collection and treatment facilities such as a single sewage treatment plant, the pipeline network and a plurality of sewage treatment facilities is realized.

Preferably, as shown in fig. 3, determining the pipe network collection carbon emission amount based on the pipe network raw data and determining the sewage treatment carbon emission amount and the sludge treatment carbon emission amount based on the sewage treatment plant raw data in step S101 includes:

S1011, determining the carbon emission amount of pipe network construction and the carbon emission amount of pipe network operation based on the pipe network original data.

S1012, calculating the pipe network collection carbon emission according to the pipe network construction carbon emission and the pipe network operation carbon emission.

Wherein, the pipe network collects the carbon emission G _pipe The calculation formula of (2) is as follows:

G _pipe ＝G _{pipe_construction} +G _{pipe_operation}

in the above, G _{pipe_construction} Represents the carbon emission amount of pipe network construction, G _{pipe_operation} Representing the carbon emission of the pipe network operation.

S1013, determining the construction carbon emission amount of the sewage treatment plant and the operation carbon emission amount of the sewage treatment plant based on the sewage treatment plant raw data.

S1014, calculating the sewage treatment carbon emission amount according to the construction carbon emission amount of the sewage treatment plant and the operation carbon emission amount of the sewage treatment plant.

Wherein, the carbon emission amount G of sewage treatment _plant The calculation formula of (2) is as follows:

G _plant ＝G _{plant_construction} +G _{plant_operation}

in the above, G _{plant_construction} Represents the construction carbon emission amount of a sewage treatment plant, G _{plant_operation} Representing the operating carbon emission of the sewage treatment plant.

S1015, determining the fuel consumption carbon emission amount of the sludge transportation means based on the raw data of the sewage treatment plant, and taking the fuel consumption carbon emission amount of the sludge transportation means as the sludge disposal carbon emission amount.

Specifically, the travel distance of the transport vehicle and the fuel efficiency of the transport vehicle in the raw data of the sewage treatment plant are extracted, and the sludge disposal carbon emission amount is determined based on the travel distance of the transport vehicle and the fuel efficiency of the transport vehicle.

Further, the carbon emission of sludge treatment is the carbon emission of the process from outside of the sludge transportation factory to the sludge treatment point, and is mainly the carbon emission G of fuel consumption of transportation tools required by the sludge transportation factory _d _ _sludge Sludge disposal carbon emission G _sludge The calculation formula of (2) is as follows:

G _sludge ＝G _d _ _sludge

further, carbon emission G of fuel consumption of transportation means required for sludge transportation and delivery _d _ _sludge (Unit: kg CO) ₂ eq/m ³ Kilogram carbon dioxide equivalent per cubic meter) is calculated as follows:

in the above, E _d _ _sludge Represents fuel energy consumption, D _i Represents the total distance (km/d ) travelled by the ith vehicle per day, E _i Represents the fuel efficiency (km/L ) of the ith vehicle, Q represents the daily throughput (m ³ /d, cubic meters per day), 2.9 represents the emission factor of the carbon emissions of the fuel, i.e. the carbon emission factor of the fuel consumption, in kg CO ₂ L (kg carbon dioxide/L).

The embodiment realizes the construction and operation of sewage treatment facilities, the quantitative evaluation of the carbon emission of the whole life cycle and the whole flow of collection and treatment and the like through the calculation of the carbon emission of pipe network collection, the carbon emission of sewage treatment and the carbon emission of sludge treatment.

Preferably, as shown in fig. 4, determining the pipe network construction carbon emission amount and the pipe network operation carbon emission amount in step S1011 based on the pipe network raw data includes:

S10111, extracting pipe network construction material consumption and pipe network construction material carbon content in the pipe network raw data, and determining the pipe network construction carbon emission based on the pipe network construction material consumption and the pipe network construction material carbon content.

Specifically, the carbon emission G of pipe network construction _{pipe_construction} Indirect carbon emission G mainly of materials required by pipe network construction _{mt_pipe_construction} Carbon emission G of pipe network construction _{pipe_construction} The calculation formula of (2) is as follows:

G _{pipe_construction} ＝G _{mt_pipe_construction}

further, indirect carbon emission G of materials required for pipe network construction _{mt_pipe_construction} The calculation formula of (2) is as follows:

in the above, EF _i _ _{pipe_construction} Represents the carbon content (kg/kg), v of the ith pipe network construction material _i _ _{pipe_construction} Represents the volume (m ³ Cubic meters), ρ _i _ _{pipe_construction} Represents the density (kg/m) of the ith pipe network construction material ³ )，N _i _ _{pipe_construction} Represents the life (a, year) of the ith pipe network construction material, F represents the design treatment capacity (m ³ /a, cubic meters per year).

S10112, extracting pipe network operation time and pipe network electrical equipment rated power in the pipe network original data, and determining pipe network operation energy consumption indirect discharge based on the pipe network operation time and the pipe network electrical equipment rated power.

Specifically, the energy consumption of pipe network operation is indirect discharge G _L _ _{pipe_operation} The calculation formula of (2) is as follows:

/>

in the above, E _L _ _{pipe_operation} Represents the electric energy consumption of a pipe network, E _pi _ _{pipe_operation} Represents the unit power consumption (kWh/m) of the i-th pipe network electrical equipment ³ )，p _i _ _{pipe_operation} Represents the rated power (kW) of the ith pipe network electrical equipment, T _i _ _{pipe_operation} Represents the i-th pipe network operation time (h/d ), and Q represents the daily throughput (m ³ D), 0.81 represents an emission factor of electric energy consumption in kg CO ₂ kWh, refers to the amount of indirect carbon emissions caused by electricity.

S10113, extracting pipe network dissipation direct emission in the pipe network raw data, and calculating the pipe network operation carbon emission based on the pipe network operation energy consumption indirect emission and the pipe network dissipation direct emission.

Specifically, the carbon emission G of pipe network operation _{pipe_operation} The calculation formula of (2) is as follows:

G _{pipe_operation} ＝G _L _ _{pipe_operation} +G _fugitive _ _{pipe_operation}

in the above, G _fugitive _ _{pipe_operation} Indicating the pipe network dissipated direct discharge.

Preferably, as shown in fig. 5, determining the construction carbon emission amount of the sewage treatment plant and the operation carbon emission amount of the sewage treatment plant based on the raw data of the sewage treatment plant in step S1013 includes:

s10131, extracting the consumption of the construction materials of the sewage treatment plant and the carbon content of the construction materials of the sewage treatment plant in the raw data of the sewage treatment plant, and determining the construction carbon emission of the sewage treatment plant based on the consumption of the construction materials of the sewage treatment plant and the carbon content of the construction materials of the sewage treatment plant.

Specifically, the construction carbon emission of the sewage treatment plant is that of carbon emission G in the construction process of the sewage treatment plant _{plant_construction} Indirect carbon emission G mainly of materials required by construction of sewage treatment plant _mt _ _{plant_construction} The expression is as follows:

G _{plant_construction} ＝G _mt _ _{plant_construction}

further, indirect carbon emission G of materials required by construction of sewage treatment plant _mt _ _{plant_construction} (kg CO ₂ eq/m ³ ) The calculation formula of (2) is as follows:

in the above, C _amount Represents the consumption of construction materials of sewage treatment plants, EF _i _ _{plant_construction} Represents the carbon content (kg/kg), v of the construction material of the ith sewage treatment plant _i _ _{plant_construction} Represents the volume (m ³ )，ρ _i _ _{plant_construction} Represents the density (kg/m) of the i-th sewage treatment plant construction material ³ )，N _i _ _{plant_construction} Represents the life (a) of the i-th sewage treatment plant construction material, and F represents the design treatment capacity (m ³ /a)。

In addition, the energy consumption E of the construction materials of the sewage treatment plant _mt _ _{plant_construction} The calculation formula of (2) is as follows:

in the above, E _mi _ _{plant_construction} Representing the process of manufacturing the i-th construction materialSpecific energy consumption (kWh/kg).

S10132, extracting the operation time of the electric equipment of the sewage treatment plant, the rated power of the electric equipment of the sewage treatment plant and the daily treatment capacity of the sewage treatment plant from the raw data of the sewage treatment plant, and determining the indirect discharge capacity of the operation energy consumption of the sewage treatment plant based on the operation time of the electric equipment of the sewage treatment plant, the rated power of the electric equipment of the sewage treatment plant and the daily treatment capacity of the sewage treatment plant.

Specifically, the operation energy consumption indirect discharge amount G of the sewage treatment plant _{L_plant_operation} (kg CO ₂ eq/m ³ ) The calculation formula of (2) is as follows:

in the above, E _{L_plant_operation} Represents the consumption of electric energy, E _{pi_plant_operation} Represents the unit electricity consumption (kWh/m) of the electric equipment of the ith sewage treatment plant ³ )，p _i Represents rated power (kW), T of electric equipment of ith sewage treatment plant _i Represents the operation time (h/d ) of the electric equipment of the ith sewage treatment plant, and Q represents the daily throughput (m ³ D), 0.81 represents an emission factor of electric energy consumption in kg CO ₂ kWh, refers to the amount of indirect carbon emissions caused by electricity.

S10133, extracting the carbon content of the chemical agent and the consumption of the chemical agent in the raw data of the sewage treatment plant, and determining the indirect discharge amount of the chemical agent consumption based on the carbon content of the chemical agent, the consumption of the chemical agent and the daily treatment amount of the sewage treatment plant.

Specifically, the chemical agent consumption indirect discharge amount G _{ch_plant_operation} (kg CO ₂ eq/m ³ ) The calculation formula of (2) is as follows:

in the above, C _ch Indicating the consumption of chemical agent, w _i Represents the consumption (kg/d) of the ith chemical agent, and Q represents the daily throughput (m ³ /d)，EF _{i_plant_operation} The carbon content (kg/kg) of the chemical agent of the i-th chemical is shown.

Further, the chemical agent energy consumption is mainly the energy consumption of chemical agents required by the operation of sewage treatment facilities (mainly sewage treatment plants), and the energy consumption E of the chemical agents required by the operation of the sewage treatment facilities _{ch_plant_operation} The calculation formula of (2) is as follows:

in the above, E _{ci_plant_operation} Represents the specific energy consumption (kWh/kg) of the ith chemical agent.

S10134, extracting methane combustion power generation carbon emission reduction and direct emission of the sewage treatment plant in the raw data of the sewage treatment plant, and calculating the operation carbon emission of the sewage treatment plant based on the operation energy consumption indirect emission of the sewage treatment plant, the chemical agent consumption indirect emission, the methane combustion power generation carbon emission reduction and the direct emission of the sewage treatment plant.

Wherein, the operation carbon emission G of the sewage treatment plant _{plant_operation} The calculation formula of (2) is as follows:

G _{plant_operation} ＝G _{L_plant_operation} +G _{ch_plant_operation} +G _{biogas_plant_operation} +G _{fugitive_plant_operation}

in the above, G _{biogas_plant_operation} Represents the carbon emission reduction of methane combustion power generation and G _{fugitive_plant_operation} Indicating the dissipated direct discharge of the sewage treatment plant.

The method for quantitatively evaluating carbon emission of town sewage treatment facilities is described below by way of a specific example.

Taking a city as an example, the quantitative evaluation method for the carbon emission of the town sewage treatment facility mainly comprises the steps of S1 calculation preparation, S2 carbon emission of a sewage collection system, S3 carbon emission of a sewage treatment system, S4 carbon emission of a sludge treatment system, S5 carbon emission summary accounting and the like.

S1, preparation is calculated, wherein the preparation comprises 2 parts of S101 target research area division, S102 basic data collection and the like.

S101, dividing a target research area, namely dividing the target research area into a plurality of drainage areas and a plurality of sewage treatment systems according to three levels, performing carbon emission calculation steps for forming 3 levels of the target research area (first level), the drainage area (second level), the sewage treatment system (third level) and the like, performing independent analysis and calculation on each sewage treatment system and each drainage area, and gradually summarizing results to finally obtain three levels of carbon emission values; a city of a target study area is divided into 12 drainage areas, wherein 10 drainage area sewage treatment facilities are put into use, and 2 drainage area sewage treatment facilities are being constructed.

S102, collecting basic data, including 3 parts of area A data, drainage area B data, sewage treatment system C data and the like; the city has 41 sewage treatment plants and 105 pump stations, wherein 10 water discharge areas which are put into use have 37 sewage treatment plants which are built into use, and the basic condition of sewage treatment facilities in the water discharge areas of a certain city is shown in the following table 3.

Table 3:

in Table 3 above, ASP (activated sludge process) represents an activated sludge process, EA (extended aeration) represents prolonged aeration, MBR (membrane bioreactor) represents a membrane bioreactor, SBR (sequential batch reactor) represents a sequencing batch reactor, ISBR (improved sequential batch reactor) represents a modified sequential batch reactor, FBR (fluidized bed reactor) represents a fluidized bed reactor, BIOFOR (attached growth biological filtration) represents an adherent growth biological filter, and OP (oxidation pond) represents an oxidation basin.

As can be seen from Table 3, 2 positive values4 sewage treatment plants under construction are arranged in the constructed drainage area; the sewage collection pipe network is 7550 km in total and comprises a 7200 km underground pipe network and a 350 km overground open channel, sewage mainly flows to a sewage treatment plant through the action of gravity in the open channel, and is discharged into a river after being treated by the sewage treatment plant after reaching standards. The city produces approximately 25.73 million liters of domestic sewage per day (25.73X10) ⁶ m ³ ) The sewage treatment design capacity of the sewage treatment facility is about 22.85×10 ⁶ m ³ The actual sewage treatment capacity is about 15.20X10 ⁶ m ³ . The urban sewage collection rate is about 30 percent, and the sewage treatment rate is about 59 percent.

The operation data of the sewage treatment facility comprise the basic data of a sewage treatment plant, the concentration of water inlet and outlet, pipe network data, electric energy consumption, sludge transportation fuel consumption, chemical agent consumption and the like.

The main treatment process of each sewage treatment plant is an activated sludge process (ASP, activated sludge process), the average pollution load per day is about 270t/d calculated by BOD, and in order to optimize the treatment capacity of the sewage treatment plant in the area, the sewage treatment plants can be jointly scheduled to treat sewage in other areas.

The pipe diameter of the sewage collection pipe network is reinforced concrete pipe with the diameter of 250mm (millimeter) to 2500mm, and the lengths of different types of pipes are shown in the following table 4.

Table 4:

drainage area	Pipe diameter of pipe (mm)	Pipe length (km)	Branch pipe diameter (mm)	Branch pipe length (km)
					D1	1400	60.11	750	999
D2	1900	55	900	1675
					D3	1200	30	900	1504
D4	1400	8.5	900	870
					D5	1000	3	450	542
D6	900	1	450	149
					D7	750	10.2	250	302
D8	750	7	250	343
					D9	900	5	450	245
D10	900	1	250	399

Collecting related index data of various electric devices of various sewage treatment facilities in various drainage areas, including data of sewage treatment plants and pipe network pump station data; electric energy consumption of sewage treatment plant (E _L ) The method can collect related data from operation records of the sewage treatment plant and calculate the related data, and can calculate the electric energy consumption of the sewage treatment plant through the rated power (P), the operation time (T), the treatment capacity (Q) of the main electric equipment of the sewage treatment plant and other data, and in order to obtain a relatively objective and scientific calculation result, the data values of the operation time (T) and the treatment capacity (Q) of the sewage treatment plant are set to be average values in a period of 6 months or more.

The chemical agent usage amount data of the sewage treatment plant can be obtained through the operation record collection of the sewage treatment plant, and mainly comprises different chemical agents in different types and various typesDosage of chemical (w) _i ) Data.

Unit energy consumption in manufacturing process of different chemical agents (E _ci ) And carbon content (EF in the chemical agent _i ) The density, unit energy consumption and carbon content of the different materials can be obtained by referring to the literature as shown in table 5 below.

Table 5:

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the BOD index of the inlet and outlet water of the pipe network and the sewage treatment plant is used for calculating the dissipated carbon emission, the BOD degradation rate of each kilometer of the pipe network is 0.38mg/L, the carbon emission of the open channel is estimated according to the underground pipe network, and the dissipated carbon emission data of each drainage area are shown in the following table 6.

Table 6:

s4, disposing carbon emission of sludge, mainly comprising carbon emission G in the process from outside of sludge delivery to sludge disposal point _sludge Carbon emission G mainly for fuel consumption of transportation means required by sludge transportation and delivery _d And collecting fuel consumption data of sludge transportation of each sewage treatment plant in each drainage area, wherein the fuel efficiency of an empty vehicle is 12km/L, and the fuel efficiency of a full vehicle is 4km/L. The energy consumption of sludge transportation is mainly the fuel energy consumption (E _d ) The related fuel consumption such as fuel oil data can be collected from a vehicle usage record or a driver, the fuel consumption is converted into equivalent electric energy consumption according to a fuel-electricity conversion Coefficient (CF), the value of the fuel-electricity conversion Coefficient (CF) is set to 15.64kWh/L, and other fuel consumption in a sewage treatment plant can be converted into electric energy consumption according to the fuel-electricity conversion coefficient to calculate carbon emission; wherein, the sludge of the sewage treatment plantThe transportation fuel consumption data are shown in table 7 below.

Table 7:

according to the steps S1-S4 of the invention, calculating the energy consumption and carbon emission of each part; the total energy consumption of the target municipal sewage treatment facility is calculated to be about 450MWh/d, the standard deviation is about 21.17MWh/d, the energy consumption of the construction stage accounts for 30% of the total energy consumption according to the life cycle stage division, the energy consumption (electric energy, diesel oil and chemical agents) of the operation stage accounts for 70% of the total energy consumption, and 79% of the energy consumption of the operation stage accounts for about 55% of the total energy consumption; according to the whole process of collection treatment, the energy consumption of sewage collection is 45.3% of the total energy consumption, the energy consumption of sewage treatment is 54.7%, the electric energy is 65.5%, the fuel is 6.7%, and the material is 27.8%; wherein the energy consumption of a certain municipal sewage treatment facility is shown in the following table 8.

Table 8:

the unit net energy consumption (total energy consumption minus energy for biogas generation) of the target municipal sewage treatment facility is about 0.26kWh/m ³ Standard deviation of 0.101kWh/m ³ The energy consumption intensity of the sewage collection is 0.09kWh/m ³ Standard deviation of 0.05kWh/m ³ The energy consumption intensity of sewage treatment is 0.19kWh/m ³ Standard deviation of 0.092kWh/m ³ The method comprises the steps of carrying out a first treatment on the surface of the Wherein the specific energy consumption (unit: kWh/m) of the sewage treatment facility in each drainage area of the target city ³ ) As shown in table 9 below.

Table 9:

s5, carbon emission summary accounting comprises S501 sewage treatment system carbon emission accounting, S502 drainage area carbon emission accounting and S503 target research area carbon emission accounting.

S501 the carbon emission accounting of a sewage treatment system is aimed at a certain sewage treatment system S _sewage The carbon emission calculation method is adopted for carrying out carbon emission calculation in different processes of the carbon emission of the S2 sewage collection system, the carbon emission of the S3 sewage treatment system, the carbon emission of the S4 sludge treatment system and the like, and the total carbon emission G of the sewage treatment system x is calculated _{sewage_x} 。

S502 carbon emission accounting in the drainage area is to perform carbon emission summarization calculation on a plurality of sewage treatment systems in the drainage area to obtain the total carbon emission G of the drainage area m _{drain_m} 。

S503, accounting the carbon emission of the target research area, namely, carrying out carbon emission summarization calculation on a plurality of drainage areas in the target research area, and calculating to obtain the total carbon emission G of the target research area _urban 。

According to the calculation result, the average carbon emission of the sewage treatment plant is about 1.046kg CO ₂ -eq/m ³ . Carbon emission of open channels in the pipe network was 0.38kg CO ₂ -eq/m ³ The carbon emission of the underground pipe network is 0.56kg CO ₂ -eq/m ³ . Thus, the average carbon emission of the entire sewage treatment facility was 1.426kg CO ₂ -eq/m ³ The carbon emissions of the sewage treatment facilities in the different drainage areas of the city are shown in the following table 10.

Table 10:

drainage area	Sewage collection process	Sewage treatment process	Totalizing	Carbon emission reduction of biogas power generation	Clean carbon emissions
						D1	0.6996	0.3689	1.0685	0.08	0.9885
D2	0.9070	0.3958	1.3028	0.07	1.2328
						D3	0.7030	0.4428	1.1458	0	1.1458
D4	0.7158	0.3120	1.0278	0.09	0.9378
						D5	0.6438	0.3185	0.9623	0	0.9623
D6	0.6217	0.3639	0.9856	0	0.9856
						D7	0.8003	0.6233	1.4235	0	1.4235
D8	0.5649	0.2881	0.8530	0	0.8530
						D9	0.4993	0.3502	0.8496	0	0.8496
D10	0.5778	0.5068	1.0846	0	1.0846

Example 2

The present embodiment provides a town sewage treatment facility carbon emission quantitative evaluation apparatus, as shown in fig. 6, comprising:

the collection module 61 is configured to collect pipe network raw data and sewage treatment plant raw data, determine pipe network collection carbon emission based on the pipe network raw data, and determine sewage treatment carbon emission and sludge treatment carbon emission based on the sewage treatment plant raw data.

In particular, the carbon emissions of town sewage treatment facilities are classified into 2 types, including direct emissions and indirect emissions, which can be obtained by considering the energy consumption (kWh/m ³ Indirect emission of greenhouse gases (kg CO) corresponding to kilowatt-hours per cubic meter ₂ eq/m ³ Kilogram carbon dioxide equivalent per cubic meter), direct emission of greenhouse gases of the corresponding process, and corresponding carbon emission reduction; wherein, each energy consumption is calculated firstly, then the corresponding carbon emission is calculated, namely, the greenhouse gas emission in each process is added, the carbon emission is converted into carbon emission, and the carbon emission is summed upCalculating; the direct emission is greenhouse gas emission generated by sewage treatment facilities directly, and comprises greenhouse gas emission in the sewage treatment process and greenhouse gas emission generated by methane combustion in the biochemical treatment process; the indirect emission is greenhouse gas emission corresponding to energy consumption of the related process of the sewage treatment facility, and is mainly carbon emission of energy consumption of construction materials, chemical agents required by operation and the like of the sewage treatment facility.

Further, greenhouse gas is indirectly discharged, which is mainly greenhouse gas discharge corresponding to energy consumption in different processes, and energy sources mainly comprise 4 kinds of electric energy, fuel, construction materials, chemical agents and the like.

A first determining module 62 for determining a total amount of wastewater treatment carbon emissions based on the pipe network collection carbon emissions, the wastewater treatment carbon emissions, and the sludge treatment carbon emissions.

A second determination module 63 for determining a total carbon emission amount of the water discharge area based on the total carbon emission amount of the sewage treatment.

a third determination module 64 for determining a target study area total carbon emissions based on the drainage area total carbon emissions.

and an evaluation module 65 for evaluating the carbon emissions of the town sewage treatment facility based on the total carbon emissions of the sewage treatment, the total carbon emissions of the drainage area, and the total carbon emissions of the target investigation area.

The carbon emission evaluation method comprises the steps of carrying out carbon emission evaluation mainly based on mass balance and life cycle theoretical models, carrying out carbon emission calculation based on greenhouse gas emission in the whole process of sewage collection, sewage treatment and sludge treatment, wherein the carbon emission calculation comprises the steps of sewage collection, carbon emission, sewage treatment, carbon emission sludge treatment, and further calculating the total carbon emission of a drainage area and the total carbon emission of a target research area, and taking the total carbon emission of the sewage treatment, the total carbon emission of the drainage area and the total carbon emission of the target research area as the evaluation result of the carbon emission of the urban sewage treatment facility.

According to the carbon emission quantitative evaluation device for the town sewage treatment facilities, on the basis of the carbon emission of the traditional sewage treatment plants, quantitative evaluation of carbon emission of a pipe network is added, quantitative evaluation of carbon emission of sewage collection facilities such as the pipe network is realized, the total carbon emission of sewage treatment is determined based on the collected carbon emission of the pipe network, the carbon emission of sewage treatment and the carbon emission of sludge treatment, the total carbon emission of sewage treatment is calculated, the total carbon emission of a drainage area and the total carbon emission of a target research area are calculated, a sewage treatment system consisting of sewage treatment facilities such as a single sewage treatment plant, sewage collection and treatment facilities such as the sewage treatment plants and the pipe network, a plurality of sewage treatment facilities is realized, and quantitative evaluation of carbon emission of areas such as the sewage treatment system is realized.

Preferably, the acquisition module 61 includes:

the first determining submodule 611 is configured to determine a pipe network construction carbon emission amount and a pipe network operation carbon emission amount based on the pipe network raw data.

A first calculation sub-module 612, configured to calculate the pipe network collected carbon emission according to the pipe network construction carbon emission and the pipe network operation carbon emission.

Wherein, the pipe network collects the carbon emission G _pipe Is of the meter(s)The calculation formula is as follows:

G _pipe ＝G _{pipe_construction} +G _{pipe_operation}

A second determining sub-module 613 for determining a construction carbon emission amount of the sewage treatment plant and an operation carbon emission amount of the sewage treatment plant based on the raw data of the sewage treatment plant.

A second calculation sub-module 614 for calculating the wastewater treatment carbon emission amount according to the wastewater treatment plant construction carbon emission amount and the wastewater treatment plant operation carbon emission amount.

G _plant ＝G _{plant_construction} +G _{plant_operation}

A third determination sub-module 615, configured to determine a sludge conveyance fuel consumption carbon emission amount based on the raw data of the sewage treatment plant, and use the sludge conveyance fuel consumption carbon emission amount as the sludge disposal carbon emission amount.

G _sludge ＝G _d _ _sludge

further, carbon emission G of fuel consumption of transportation means required for sludge transportation and delivery _d _ _sludge (unit: kg)

CO ₂ eq/m ³ Kilogram carbon dioxide equivalent per cubic meter) is calculated as follows:

Preferably, the first determining sub-module 611 includes:

and a first determining unit 6111, configured to extract the pipe network construction material consumption and the pipe network construction material carbon content in the pipe network raw data, and determine the pipe network construction carbon emission based on the pipe network construction material consumption and the pipe network construction material carbon content.

G _{pipe_construction} ＝G _{mt_pipe_construction}

And the second determining unit 6112 is used for extracting the pipe network operation time and the rated power of the pipe network electrical equipment in the pipe network raw data, and determining the indirect emission of pipe network operation energy consumption based on the pipe network operation time and the rated power of the pipe network electrical equipment.

And a third determining unit 6113, configured to extract a pipe network dissipation direct emission amount in the pipe network raw data, and calculate the pipe network operation carbon emission amount based on the pipe network operation energy consumption indirect emission amount and the pipe network dissipation direct emission amount.

Preferably, the second determining sub-module 613 includes:

and a fourth determining unit 6131 for extracting the consumption amount of the construction material of the sewage treatment plant and the carbon content of the construction material of the sewage treatment plant in the raw data of the sewage treatment plant, and determining the construction carbon emission amount of the sewage treatment plant based on the consumption amount of the construction material of the sewage treatment plant and the carbon content of the construction material of the sewage treatment plant.

G _{plant_construction} ＝G _mt _ _{plant_construction}

in the above, C _amount Represents the consumption of construction materials of sewage treatment plants, EF _i _ _{plant_construction} Represents the carbon content (kg/kg), v of the construction material of the ith sewage treatment plant _i _ _{plant_construction} Represents the volume (m ³ )，ρ _i _ _{plant_construction} Represents the density (kg/m) of the i-th sewage treatment plant construction material ³ )，N _i _ _{plant_construction} The service life (a) of the construction material of the ith sewage treatment plant is shown, and F represents sewageDesign throughput (m of water treatment plant ³ /a)。

in the above, E _mi _ _{plant_construction} The unit energy consumption (kWh/kg) during the production of the ith construction material is shown.

And a fifth determining unit 6132, configured to extract a sewage treatment plant electric device operation time, a sewage treatment plant electric device rated power, and a sewage treatment plant daily throughput from the sewage treatment plant raw data, and determine an indirect discharge amount of operation energy consumption of the sewage treatment plant based on the sewage treatment plant electric device operation time, the sewage treatment plant electric device rated power, and the sewage treatment plant daily throughput.

A sixth determining unit 6133 for extracting a chemical agent carbon content and a chemical agent consumption amount in the raw data of the sewage treatment plant, and determining a chemical agent consumption indirect discharge amount based on the chemical agent carbon content, the chemical agent consumption amount, and the daily treatment amount of the sewage treatment plant.

A seventh determining unit 6134, configured to extract a methane-burning power generation carbon emission reduction amount and a sewage treatment plant dissipation direct emission amount from the raw data of the sewage treatment plant, and calculate the sewage treatment plant operation carbon emission amount based on the sewage treatment plant operation energy consumption indirect emission amount, the chemical agent consumption indirect emission amount, the methane-burning power generation carbon emission reduction amount, and the sewage treatment plant dissipation direct emission amount.

Example 3

The embodiment provides a computer device, which comprises a memory and a processor, wherein the processor is used for reading instructions stored in the memory to execute the quantitative evaluation method for carbon emission of the town sewage treatment facility in any of the above method embodiments.

It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

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

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

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

Example 4

The present embodiment provides a computer-readable storage medium storing computer-executable instructions that can perform a town sewage treatment facility carbon emission quantitative evaluation method in any of the above-described method embodiments. Wherein the storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. A quantitative evaluation method for carbon emission of town sewage treatment facilities is characterized by comprising the following steps:

collecting pipe network original data and sewage treatment plant original data, determining pipe network collection carbon emission based on the pipe network original data, and determining sewage treatment carbon emission and sludge treatment carbon emission based on the sewage treatment plant original data;

determining a total wastewater treatment carbon emission amount based on the pipe network collection carbon emission amount, the wastewater treatment carbon emission amount, and the sludge treatment carbon emission amount; wherein, the carbon emission summary calculation is carried out on a plurality of sewage treatment settings in the drainage area, and the total carbon emission G of the drainage area m _{drain_m} The calculation formula of (2) is as follows:

wherein G is _{sewage_x} Representing the total carbon emission amount of sewage treatment;

determining a total amount of carbon emissions in the drainage zone based on the total amount of carbon emissions in the wastewater treatment; wherein, the total carbon emission is calculated for a plurality of drainage areas in the target research area, and the total carbon emission G of the target research area _urban The calculation formula of (2) is as follows:

evaluating the town sewage treatment facility carbon emissions based on the total sewage treatment carbon emissions, the total drainage zone carbon emissions, and the total target research area carbon emissions;

Before collecting pipe network raw data and sewage treatment plant raw data, determining pipe network collection carbon emission based on the pipe network raw data, and determining sewage treatment carbon emission and sludge treatment carbon emission based on the sewage treatment plant raw data, the method further comprises:

dividing a target research area to generate a drainage area and sewage treatment facilities; wherein, the drainage area includes a plurality of sewage treatment facilities, and sewage treatment facilities include sewage treatment plant and pipe network.

2. The quantitative evaluation method for carbon emission of town sewage treatment facilities according to claim 1, wherein said determining a pipe network collection carbon emission amount based on said pipe network raw data and determining a sewage treatment carbon emission amount and a sludge disposal carbon emission amount based on said sewage treatment plant raw data comprises:

calculating the pipe network collection carbon emission according to the pipe network construction carbon emission and the pipe network operation carbon emission;

determining the construction carbon emission amount of the sewage treatment plant and the operation carbon emission amount of the sewage treatment plant based on the sewage treatment plant original data;

Calculating the sewage treatment carbon emission amount according to the construction carbon emission amount of the sewage treatment plant and the operation carbon emission amount of the sewage treatment plant;

determining a sludge conveyance fuel consumption carbon emission amount based on the sewage treatment plant raw data, and taking the sludge conveyance fuel consumption carbon emission amount as the sludge disposal carbon emission amount.

3. The quantitative evaluation method for carbon emission of town sewage treatment facilities according to claim 2, wherein said determining the carbon emission amount of pipe network construction and the carbon emission amount of pipe network operation based on said pipe network raw data comprises:

extracting pipe network construction material consumption and pipe network construction material carbon content in the pipe network raw data, and determining the pipe network construction carbon emission based on the pipe network construction material consumption and the pipe network construction material carbon content;

extracting pipe network operation time and pipe network electrical equipment rated power in the pipe network original data, and determining pipe network operation energy consumption indirect discharge based on the pipe network operation time and the pipe network electrical equipment rated power;

and extracting pipe network dissipation direct emission in the pipe network raw data, and calculating the pipe network operation carbon emission based on the pipe network operation energy consumption indirect emission and the pipe network dissipation direct emission.

4. The quantitative evaluation method for carbon emission of town sewage treatment facilities according to claim 2, wherein said determining the construction carbon emission amount of the sewage treatment plant and the operation carbon emission amount of the sewage treatment plant based on the raw data of the sewage treatment plant comprises:

extracting the running time of the electric equipment of the sewage treatment plant, the rated power of the electric equipment of the sewage treatment plant and the daily treatment capacity of the sewage treatment plant from the raw data of the sewage treatment plant, and determining the operation energy consumption indirect discharge capacity of the sewage treatment plant based on the running time of the electric equipment of the sewage treatment plant, the rated power of the electric equipment of the sewage treatment plant and the daily treatment capacity of the sewage treatment plant;

extracting chemical agent carbon content and chemical agent consumption in the raw data of the sewage treatment plant, and determining chemical agent consumption indirect discharge amount based on the chemical agent carbon content, the chemical agent consumption amount and daily treatment amount of the sewage treatment plant;

Extracting methane combustion power generation carbon emission reduction and direct emission of the sewage treatment plant in the original data of the sewage treatment plant, and calculating the operation carbon emission of the sewage treatment plant based on the operation energy consumption indirect emission of the sewage treatment plant, the chemical agent consumption indirect emission, the methane combustion power generation carbon emission reduction and the direct emission of the sewage treatment plant.

5. The quantitative evaluation method for carbon emission of town sewage treatment facility as claimed in claim 2, wherein said determining a sludge conveyance carbon emission amount based on said sewage treatment plant raw data, taking said sludge conveyance carbon emission amount as said sludge disposal carbon emission amount, comprises:

and extracting the travel distance of the transport vehicle and the fuel efficiency of the transport vehicle in the raw data of the sewage treatment plant, and determining the carbon emission amount of sludge disposal based on the travel distance of the transport vehicle and the fuel efficiency of the transport vehicle.

6. The quantitative evaluation method for carbon emission of town sewage treatment facility as claimed in claim 1, wherein said determination of total amount of carbon emission for sewage treatment based on said pipe network collection carbon emission amount, said sewage treatment carbon emission amount and said sludge treatment carbon emission amount is carried out as follows:

7. A town sewage treatment facility carbon emission quantitative evaluation device, characterized by comprising:

the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring pipe network raw data and sewage treatment plant raw data, determining pipe network collection carbon emission based on the pipe network raw data, and determining sewage treatment carbon emission and sludge treatment carbon emission based on the sewage treatment plant raw data; wherein, before gathering pipe network raw data and sewage treatment plant raw data, confirm pipe network collection carbon emission based on pipe network raw data to confirm sewage treatment carbon emission and mud and handle carbon emission based on sewage treatment plant raw data, still include:

dividing a target research area to generate a drainage area and sewage treatment facilities; wherein the drainage area comprises a plurality of sewage treatment facilities, and the sewage treatment facilities comprise sewage treatment plants and pipe networks;

a first determination module for determining a total wastewater treatment carbon emission amount based on the pipe network collection carbon emission amount, the wastewater treatment carbon emission amount, and the sludge treatment carbon emission amount; wherein, the carbon emission summary calculation is carried out on a plurality of sewage treatment settings in the drainage area, and the total carbon emission G of the drainage area m _{drain_m} The calculation formula of (2) is as follows:

a second determining module for determining a total carbon emission amount of the drainage area based on the total carbon emission amount of the sewage treatment; wherein, the total carbon emission is calculated for a plurality of drainage areas in the target research area, and the total carbon emission G of the target research area _urban The calculation formula of (2) is as follows:

a third determination module for determining a target study area total carbon emissions based on the drainage area total carbon emissions;

8. A computer device comprising a processor and a memory, wherein the memory is for storing a computer program, the processor being configured to invoke the computer program to perform the steps of the method according to any of claims 1-6.

9. A computer readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the steps of the method according to any of claims 1-6.