CN114996899A - Method and system for calculating carbon emission of sewage treatment plant - Google Patents
Method and system for calculating carbon emission of sewage treatment plant Download PDFInfo
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Abstract
The invention provides a method and a system for calculating carbon emission of a sewage treatment plant, wherein the method comprises the steps of determining a carbon emission boundary of the sewage treatment plant, dividing the boundary into a sewage treatment facility, a sludge treatment facility and an auxiliary structure, and calculating greenhouse gases including CH4, N2O and CO 2; according to the carbon emission boundary of a sewage treatment plant, three types of carbon emission and carbon sink are divided, including a direct emission range I, an indirect emission range II and an indirect emission range III; respectively establishing calculation models of range one, range two and range three carbon emission and carbon sink; respectively calculating the carbon emission in the first range, the second range and the third range and the emission reduction amount of the carbon sink according to the calculation model; and summarizing the carbon emission and the emission reduction amount to obtain the total emission and the net emission of the sewage treatment plant. The invention has the beneficial effects that: the carbon emission condition of the whole sewage treatment process can be analyzed.
Description
Technical Field
The invention relates to a carbon emission calculation method, in particular to a carbon emission calculation method for a sewage treatment plant.
Background
Greenhouse gas emission caused by treatment of urban waste (including waste water, sludge, solid waste and the like) is an important emission source second only to energy activities, industrial production activities and the like, pollution control in China is advancing to the stage of synergistic treatment of greenhouse gas and environmental pollutants, but the emission of CH4, N2O, CO2 and the like is accompanied in the sewage treatment process, and the emission mainly comes from degradation and conversion of carbon and nitrogen-containing pollutants, a large amount of electric power and chemicals are consumed in the treatment process, upstream sewage conveying, downstream water conveying, staff commuting and the like. At present, the international and domestic accounting guidelines on the aspect of carbon emission in sewage treatment are not complete, and no special carbon emission accounting standard or guideline for a sewage treatment system exists at home. The existing research on carbon emission accounting of a sewage treatment system is numerous, but the method is different, and the following problems exist:
(1) the calculation range is incomplete: the complete sewage treatment system comprises a sewage treatment process and a sludge treatment process, but the carbon emission accounting of most of the sewage treatment systems actually does not bring the sludge treatment process into the calculation range.
(2) Carbon sequestration was not considered: in the process of sewage treatment and disposal, certain measures (such as heat energy recovery, incineration power generation and the like) can contribute to carbon emission reduction, and measurement is taken into consideration to correspondingly reduce the carbon emission in the process of system carbon calculation, but the carbon sink is less considered in the current guide and model, and the basis for carbon sink calculation is lacked.
(3) The third range is not considered: the third range is mainly the upstream and downstream discharge of the industrial chain, and the outsourcing equipment and medicaments of the sewage treatment system, the trip of staff and the like are all the third range discharge, but the current research is basically not considered.
Therefore, a carbon emission calculation method of a sewage treatment system needs to be developed to guide a sewage treatment plant to calculate the carbon emission, identify main emission sources and exploit the potential of carbon emission reduction and carbon sink, so that energy conservation and consumption reduction are realized, and economic benefits are brought to enterprises.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a method and a system for calculating carbon emission of a sewage treatment plant.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for calculating carbon emission of a sewage treatment plant comprises the following steps,
determining the carbon emission boundary of a sewage treatment plant, and dividing the boundary into a sewage treatment facility, a sludge treatment facility and an auxiliary structure, wherein the calculated greenhouse gas comprises CH 4 、N 2 O、CO 2 ；
According to the carbon emission boundary of a sewage treatment plant, dividing a direct emission range I, an indirect emission range II, an indirect emission range III and a carbon sink into four types, and respectively identifying sources;
respectively establishing a calculation model of a range I, a range II, a range III and a carbon sink;
respectively calculating the carbon emission in a first range, a second range and a third range and the emission reduction amount of the carbon sink according to the carbon emission calculation model;
and summarizing and analyzing the range I, the range II, the range III and the carbon sink to obtain the total discharge and the net discharge of the sewage treatment plant.
Further, the classification of the carbon emission source is specifically,
range one of direct emissions E1 includes: fossil fuel combustion discharge E11, sewage treatment process discharge E12 and sludge treatment process discharge E13;
range two E2 for indirect emissions includes: outsourcing power carbon emission E21 and outsourcing thermal carbon emission E22;
range three E3 for indirect emissions includes: outsourcing agent carbon emission E31, outsourcing equipment carbon emission E32, upstream wastewater transport carbon emission E33, sludge outsourcing disposal carbon emission E34, downstream effluent transport carbon emission E35, business trip carbon emission E36, and employee commuting carbon emission E37;
carbon sink Er includes: the carbon of the marsh gas is recycled and is combined with Er1 and forestry carbon is combined with Er 2.
Further, calculating the carbon emissions for range one E1 of direct emissions includes: calculating CO of fossil fuel combustion 2 Is marked as
Further, calculate the lengthCarbon emissions in the range of E1 include: calculating carbon emission in sewage treatment process and sludge treatment process CH 4 And (3) discharging, wherein the specific carbon discharge in the sewage treatment process is calculated as follows: calculating the generation of CO by denitrification with an external carbon source 2 Is marked as E 12aCO2 (ii) a Calculation of CH production by anaerobic digestion Process 4 Is marked as E 12bCH4 (ii) a Calculating the production of N in the denitrification process 2 O, is marked as
Calculating sludge treatment process CH 4 Is marked as
Further, calculating the carbon emissions for range two E2 of indirect emissions includes: calculating the carbon emission of outsourcing power and recording as
Calculate outsourcing thermal carbon emissions, record
Further, calculating the carbon emissions for range three E3 of indirect emissions includes: calculate carbon emissions of outsourcing agents, and record
Calculate the carbon emissions of the outsourcing equipment, record
Calculate upstream wastewater carbon delivery emissions, note
Further, calculating the carbon emissions for the indirect emissions range three E3 further includes: calculating the carbon emission of the outward transportation of the sludge and respectively recording the carbon emission as
And
further, calculating the carbon emissions for the indirect emissions range three E3 further includes: calculating the carbon emission of the downstream water outlet and recording the carbon emission as
Calculating carbon emissions of business travel, as
Calculate employee commute carbon emissions, note
Further, calculating the carbon reduction of the carbon sink Er comprises:
calculating the carbon sink recovered from the biogas, and marking as
Calculating forestry carbon sink, record
The other technical scheme of the invention is as follows: a carbon emission calculation system of a sewage treatment plant comprises,
a carbon emission boundary determining module for determining the carbon emission boundary of a sewage treatment plant, which is divided into a sewage treatment facility, a sludge treatment facility and an auxiliary structure, wherein the calculated greenhouse gas comprises CH 4 、N 2 O、CO 2 ；
The carbon emission source dividing module is used for identifying the type according to a direct emission range I, an indirect emission range II, an indirect emission range III and a carbon sink according to a carbon emission boundary of a sewage treatment plant;
the carbon emission calculation model establishing module is used for respectively establishing a carbon emission amount and carbon sink emission reduction calculation model in a first range, a second range and a third range;
the carbon emission calculation module is used for respectively calculating the carbon emission in the first range, the second range and the third range and the emission reduction amount of the carbon sink according to the carbon emission calculation model;
and the carbon emission summarizing module summarizes and analyzes the range I, the range II, the range III and the carbon sink to obtain the total emission and the net emission of the sewage treatment plant.
The invention has the beneficial effects that: take into account CO 2 And CH 4 、N 2 And O, the carbon emission condition of the whole sewage treatment process can be analyzed. Standardizing and planning the carbon emission accounting process, and making the accounting result indicate the data such as standards and the like according to the accounting process, thereby avoiding the problems of omission and non-standardization of the accounting process and the like. The carbon emission levels of different nodes and different categories can be identified, and reference opinions can be provided for design and operator to carry out system optimization and realize pollution and carbon reduction coordination.
Drawings
In order to more clearly illustrate the embodiments or solutions of the present invention in the prior art, the drawings used in the description of the embodiments or solutions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is also possible for those skilled in the art to obtain other drawings based on the mechanisms shown in these drawings without creative efforts.
FIG. 1 is a flow chart of a method for calculating carbon emission of a sewage treatment plant according to an embodiment of the invention;
FIG. 2 is a block diagram of a system for calculating carbon emission of a sewage treatment plant according to an embodiment of the present invention;
FIG. 3 is a diagram of greenhouse gas accounting boundaries according to an embodiment of the present invention;
FIG. 4 is a block diagram of a computational model of the scope of an embodiment of the present invention;
FIG. 5 is a block diagram of a range two computational model of an embodiment of the present invention;
FIG. 6 is a block diagram of a range three computational model of an embodiment of the present invention;
FIG. 7 is a block diagram of a carbon sink calculation model according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the description of the invention relating to "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The technical scheme of the application relates to the following references and documents in the field:
1. 2006 IPCC guideline
2. Method for accounting greenhouse gas emission of enterprises in other industries of industry and reporting guidelines (trial implementation)
3. Carbon accounting method and model research for urban Sewage treatment System, Chongqing university, 2013, Yangshi Qi
4. Accounting for greenhouse gas emission and analysis of time-space characteristics in the Sewage treatment industry in cities and towns in China, Water supply and drainage, 2019, Guoshenjie
5. Study on carbon footprint accounting and environmental comprehensive impact evaluation in Sewage treatment, Beijing university of construction, 2019, Wangzhongyang
As shown in fig. 1, the first embodiment of the present invention is: a method for calculating carbon emission of a sewage treatment plant comprises the following steps,
s10, determining the carbon emission boundary of the sewage treatment plant, and dividing the carbon emission boundary into a sewage treatment facility and a sludge treatment facilityApplying auxiliary structures, the calculated greenhouse gas including CH 4 、N 2 O、CO 2 (ii) a FIG. 3 illustrates the greenhouse gas check boundary;
s20, dividing four carbon emission sources according to the carbon emission boundary of the sewage treatment plant, wherein the four carbon emission sources comprise a direct emission range I, an indirect emission range II, an indirect emission range III and a carbon sink;
s30, respectively establishing a carbon emission amount and carbon sink emission reduction calculation model in a first range, a second range and a third range;
s40, respectively calculating the amount of the first range, the second range, the third range and the carbon sink according to the carbon emission calculation model;
and S50, summarizing the amounts of the range I, the range II, the range III and the carbon sink to obtain the total discharge amount and the net discharge amount of the sewage treatment plant.
Wherein the carbon emission and the carbon sink are divided into,
range one of direct emissions E1 includes: fossil fuel combustion discharge E11, sewage treatment process discharge E12 and sludge treatment process discharge E13;
range two E2 for indirect emissions includes: outsourcing power carbon emission E21 and outsourcing thermal carbon emission E22;
range three E3 for indirect emissions includes: outsourcing agent carbon emission E31, outsourcing equipment carbon emission E32, upstream wastewater transport carbon emission E33, sludge outsourcing disposal carbon emission E34, downstream effluent transport carbon emission E35, business trip carbon emission E36, and employee commuting carbon emission E37;
carbon sink Er includes: the carbon of the marsh gas is recycled and is combined with Er1 and forestry carbon is combined with Er 2.
The carbon emissions were calculated as follows:
(1) range one E1 (direct exhaust), shown in FIG. 4 as the range one E1 computational model.
1) E11 Fuel Combustion CO 2 Discharging
Equation 1:
in the formula (I), the compound is shown in the specification,
the carbon emission is the carbon emission of fossil fuel combustion in the unit of kgCO in a sewage treatment plant 2 e; i is the type of fossil fuel; AD 11，i Consumption for the combustion of fossil fuels, i.e. fuel, in tons of solid or liquid and in tens of thousands of Nm of gaseous fuel 3 The numerical value is obtained by statistics in a production report form of a sewage treatment plant; CCi is the carbon content per calorific value of the ith fuel, the solid or liquid is per ton of carbon per ton of fuel, and the gas fuel is per ton of carbon per ten thousand Nm 3 The calculation model reference guide is set as a default value; OFi is the carbon oxidation rate of the ith fuel, and the present calculation model is set as a default value with reference to the guide.
2) Carbon emission in E12 wastewater treatment process
a. Denitrification with external carbon source to produce CO 2
Equation 2: e 1aCo2 ＝1.375×10 -3 M CH3OH
In the formula, E 12aCO2 CO generated by external carbon source in the denitrification stage of sewage treatment 2 In units of kg; m is a group of CH3OH The unit is kg of the total methanol mass added in the sewage treatment process.
b. Production of CH by anaerobic digestion 4
Equation 3:
in the formula, E 12bCH4 For CH in anaerobic reaction stage of sewage treatment 4 The discharge amount is kg; q is the water inflow of the anaerobic tank of the sewage plant and the unit is m 3 The value is from monitoring data of a sewage treatment plant; BOD o, anaerobic The BOD is the influent BOD of the anaerobic tank, the unit is mg/L, and the numerical value is from the detection data of a sewage treatment plant; BOD e, anaerobic The BOD of the effluent of the anaerobic tank is mg/L, and the numerical value is from the detection data of a sewage treatment plant; y is the MLVSS proportion in the MLSS, and the numerical value is obtained by calculation of detection data from a sewage treatment plant; yt is total sludge productionCoefficient of rate in kg MLSS/kg BOD 5 The numerical value is obtained by calculating detection data from a sewage treatment plant; r is 12b Is the methane recovery in kgCH 4 The value of/d is derived from CH in sewage treatment plants 4 And recovering the monitoring data in the pipeline.
c. Production of N in the denitrification process 2 O
Equation 4:
in the formula (I), the compound is shown in the specification,
n for denitrification process of sewage treatment 2 O emission in kg; q is total water inflow of sewage plant, and the unit is m 3 The value is from monitoring data of a sewage treatment plant; TN (twisted nematic) o The unit of the inlet water TN of the sewage treatment plant is mg/L, and the numerical value is from the monitoring data of the sewage treatment plant; TN (twisted nematic) e The TN amount of the effluent of the sewage treatment plant is in mg/L, and the numerical value is from the monitoring data of the sewage treatment plant; EFi is N of different denitrification processes 2 O-emission factor in kgN 2 O-N/kgN, and the calculation model is set as a default value by referring to industry experience parameters.
3) E13 sludge treatment Process CH 4 Discharging
Equation 5:
in the formula (I), the compound is shown in the specification,
CH produced for anaerobic sludge digestion process 4 The discharge amount is in kg; q Sludge treatment The total sludge yield of the sewage plant is m 3 D, the value is from monitoring data of a sewage treatment plant; VSS o, anaerobic The unit of VSS is mg/L, and the numerical value is from the detection data of a sewage treatment plant; VSS e, anaerobic The unit of VSS is mg/L, and the numerical value is from the detection data of a sewage treatment plant; r is 13 Is the methane recovery in kgCH 4 The value of/d is from CH in the sludge anaerobic digestion tank 4 And recovering the monitoring data in the pipeline.
(2) Range two E2 (Indirect emission), shown in FIG. 5 as a range two E2 computational model.
E2＝E21+E22
1) E21 outsourcing power carbon emission
Equation 6:
in the formula (I), the compound is shown in the specification,
CO hidden in outsourcing electric power of sewage treatment plant 2 Emission in kgCO 2 e；AD 21, electric power The unit of the power consumption purchased by the sewage treatment plant is KWh, and the numerical value is from monitoring data of the sewage treatment plant; EF Electric power CO for electric power supply 2 Emission factor in kgCO 2 The calculation model is set as a default value by referring to a corresponding regional power grid emission factor published by a national governing body.
2) E22 outsourcing thermal carbon emissions
Equation 7
In the formula (I), the compound is shown in the specification,
implicit CO for outsourcing heat power of sewage treatment plant 2 Emission in kgCO 2 e；AD 22, heat power The unit of the heat power consumption purchased by the sewage treatment plant is GJ, and the numerical value is from the monitoring data of the sewage treatment plant; EF Heating power CO for thermal power supply 2 Emission factor in kgCO 2 GJ, the calculation model refers to the official number published by government governing bodyAccording to (where present) or recommended value of 0.11tCO 2 the/GJ is set to a default value.
(3) Range three E3 (Indirect emission), shown in FIG. 6 as a range three E3 computational model.
1) E31 carbon emissions of outsourcing medicaments
Equation 8:
in the formula (I), the compound is shown in the specification,
CO caused by adding medicament to sewage treatment plant 2 Emission in kgCO 2 e; i is the type of agent; y is i The consumption of the ith medicament is in kg, and the numerical value is from statistical data of a sewage treatment plant; EF i Is the emission factor of the ith medicament and has the unit of ton of CO 2 The calculation model is set as a default value by referring to industry experience parameters.
2) E32 outsourcing equipment carbon emission
Equation 9:
in the formula (I), the compound is shown in the specification,
CO caused by equipment procurement of sewage treatment plant 2 Emission in kgCO 2 e; i is the type of equipment, including instruments, equipment, pipelines and other materials; s i The consumption of the ith equipment is measured in units of measurement units (including kg, m, items, and the like) of the equipment, and the numerical value is obtained from statistical data of a sewage treatment plant; EF i Is the discharge factor of the ith medicament and has the unit of ton CO 2 The calculation model is set as a default value by referring to industry experience parameters.
3) E33 upstream wastewater transport carbon discharge
Equation 10:
in the formula (I), the compound is shown in the specification,
for conveying hidden CO for upstream sewage of sewage treatment plant by pressurizing 2 Emission in kgCO 2 e；AD 33, electric power The unit of the electric power consumption of the upstream sewage conveying unit for conveying the sewage is KWh, and the numerical value is from the monitoring data of the upstream conveying unit; EF Electric power CO for electric power supply 2 An emission factor.
4) E34 carbon emission of sludge outward transportation disposal after dehydration
Generally, after sludge is dewatered by a sewage treatment plant until the water content reaches the standard, a third party is entrusted to carry out tail end treatment on the sludge, the treatment modes comprise modes of landfill, land utilization, incineration and the like, and carbon emission caused by consumption of fuel, electric power, heat and the like in the treatment process belongs to emission in the range of three for the sewage treatment plant.
Equation 11:
in the formula (I), the compound is shown in the specification,
for sludge transportation process vehicle consuming fuel, disposing CO caused by combustion of process fuel 2 Emission in kgCO 2 e; the calculation procedure is the same as equation 1, AD 34，i For the consumption of the sludge disposal unit for the combustion of fossil fuel variety i as fuel, the numerical value is obtained from statistics in production reports of the sludge disposal unit.
Equation 12:
in the formula (I), the compound is shown in the specification,
CH caused by sludge landfill 4 Amount of production, unitIs kg; w is a 1 The unit is t/d, which is the amount of dry sludge for landfill; MCF is a methane correction factor; DOC is the proportion of easily degradable organic carbon; DOC F In DOC ratio for conversion to biogas, F is CH 4 In proportion in landfill gas, the calculation model uses MCF, DOC and DOC F And F, referring to an industry guide and an industry experience value, and setting the industry guide and the industry experience value as default values.
Equation 13:
in the formula (I), the compound is shown in the specification,
implicit CO for power consumption in sludge disposal process 2 Emission in kgCO 2 e；AD 34, electric power The unit of sludge treatment is the KWh, and the numerical value is obtained from a statistical system in a production report form of the sludge treatment unit; EF Electric power CO for electricity supply 2 An emission factor.
5) E35 downstream Water delivery carbon emissions
Equation 14:
in the formula (I), the compound is shown in the specification,
for conveying implicit CO by pressurizing water treated by sewage treatment plant 2 Emission in kgCO 2 e；AD 35, electric power The unit is KWh which is the consumed power of the downstream treated effluent in the conveying process of the downstream conveying unit, and the numerical value is from the monitoring data of the downstream conveying unit; EF Electric power CO for electricity supply 2 An emission factor.
6) E36 business trip carbon emissions
Equation 15:
in the formula (I), the compound is shown in the specification,
CO produced by operators of sewage treatment plants due to traffic during commercial activities (including automobiles, rail traffic, buses, taxis, etc.) 2 Emission in kgCO 2 e；P 36，i Total passenger capacity for the i-th type of transportation; l is a radical of an alcohol 36，i The unit of the operating mileage is km for the ith type of traffic mode vehicle; beta is a i The calculation model is set as a default value based on industry guidelines and research experience, wherein the unit is kg/person.
7) E37 employee commuting carbon emissions
Equation 16:
in the formula (I), the compound is shown in the specification,
CO produced for transportation of operators of sewage treatment plants from residence to work site (including buses, taxis, private cars, etc.) 2 Emission in kgCO 2 e; the calculation method is the same as formula 15.
(4) Carbon sink Er, as shown in fig. 7, is a carbon sink calculation model.
1) Carbon sink amount caused by Er1 biogas recovery
Equation 18:
in the formula (I), the compound is shown in the specification,
for the CH recycled by sewage treatment plants 4 Amount in kg; k is CH in marsh gas 4 In proportion, the calculation model sets the industry research experience as a default value; m is a group of Biogas The unit of the mass of the methane recycled by the sewage treatment plant is kg, and the numerical value is from a sewage and sludge anaerobic treatment systemAnd (5) collecting and monitoring the biogas of the system.
2) Forestry carbon sink caused by Er2 factory plants
Equation 19:
in the formula (I), the compound is shown in the specification,
the greenhouse gas quantity absorbed by green plants planted in a sewage treatment plant is kgCO 2 e；A i Is the area of canopy width of the i-th plant in m 2 The numerical value is derived from the measurement data of a sewage treatment plant; EF i Is the carbon fixation coefficient of the i-th plant and has the unit of kg/(m) 2 A), the present computational model will set industry guidelines based, research experience to default values.
And (3) analyzing and summarizing carbon emission results:
(1) range one emissions E1:
(2) range two emissions E2:
(3) range three emissions E3:
(4) carbon sequestration amount Er:
(5) carbon emission GWP of sewage treatment plant is E1+ E2+ E3-Er, unit kgCO 2 e
In the formula: GWP (C)H 4 ) Is CH 4 Warming potential of (2), GWP (N) 2 O) is N 2 O, the present computational model will be set to default values based on industry guidelines.
Compared with the prior art, the invention has the following advantages and effects:
1. the invention comprehensively considers the emission and carbon sink conditions of the range one, the range two and the range three, and considers the CO 2 And CH 4 、N 2 And O, the carbon emission condition of the whole sewage treatment process can be analyzed.
2. The invention fully utilizes research results and empirical data to solve the problems of missing sewage treatment accounting standards, non-uniform research methods and the like at home and abroad, can be set as a system default value for selection, and is convenient for professionals in the non-double-carbon field to quickly carry out carbon emission accounting work.
3. The invention standardizes and plans the carbon emission accounting process, and the accounting result indicates the data such as the standard and the like according to the accounting process, thereby avoiding the problems of omission and non-standardization of the accounting process and the like.
4. The invention can identify the carbon emission levels of different nodes and different categories, and can provide reference opinions for design and operation personnel to carry out system optimization and realize pollution and carbon reduction synergy.
In conclusion, the invention can realize the rapid analysis of the carbon emission level of the whole process of the sewage treatment system, standardizes the process, fully combines the data of the existing standard and research result, can compare the accounting results of different dimensions and different standards, and ensures the data to be real and reliable. The accounting result is beneficial to designers for optimizing process design and optimizing regulation and control management of operators, so that the low-carbon and zero-carbon targets of the system are realized while the cost is reduced.
As shown in fig. 2, another embodiment of the present invention is: a carbon emission calculation system of a sewage treatment plant comprises,
a carbon emission boundary determining module 10 for determining the carbon emission boundary of a sewage treatment plant, which is divided into a sewage treatment facility, a sludge treatment facility and an auxiliary structure, wherein the calculated greenhouse gas comprises CH 4 、N 2 O、CO 2 ；
The carbon emission source dividing module 20 is used for dividing four carbon emission sources according to the carbon emission boundary of the sewage treatment plant, wherein the four carbon emission sources comprise a direct emission range I, an indirect emission range II, an indirect emission range III and a carbon sink;
the carbon emission calculation model establishing module 30 is used for respectively establishing carbon emission calculation models of a range I, a range II, a range III and a carbon sink;
the carbon emission calculation module 40 is used for calculating the amount of the carbon sink in a range I, a range II, a range III and the amount of the carbon sink according to the carbon emission calculation model;
and the carbon emission summarizing module 50 summarizes the amount of the carbon sink in the first range, the second range, the third range to obtain the total emission amount and the net emission amount of the sewage treatment plant.
It should be noted that, as can be clearly understood by those skilled in the art, the specific implementation process of the carbon emission calculation system for a sewage treatment plant may refer to the corresponding description in the foregoing method embodiment, and for convenience and brevity of description, no further description is provided herein.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for calculating carbon emission of a sewage treatment plant is characterized by comprising the following steps: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
determining carbon emission boundary of sewage treatment plant, and dividing into sewage treatment facility, sludge treatment facility and auxiliary structure, wherein the calculated greenhouse gas comprises CH 4 、N 2 O、CO 2 ；
According to the carbon emission boundary of a sewage treatment plant, dividing a direct emission range I, an indirect emission range II, an indirect emission range III and a carbon sink into four types, and respectively identifying sources;
respectively establishing a first range carbon emission amount calculation model, a second range carbon emission amount calculation model, a third range carbon emission amount calculation model and a carbon sink emission reduction calculation model;
respectively calculating the discharge capacity of a range I, a range II, a range III and the discharge capacity reduction of the carbon sink according to the carbon discharge calculation model;
and summarizing and analyzing the range I, the range II, the range III and the carbon sink to obtain the total discharge and the net discharge of the sewage treatment plant.
2. The method for calculating carbon emission of a sewage treatment plant according to claim 1, characterized in that: the classification of the carbon emission source is specifically,
range one of direct emissions E1 includes: fossil fuel combustion discharge E11, sewage treatment process discharge E12 and sludge treatment process discharge E13;
range two E2 for indirect emissions includes: outsourcing power carbon emission E21 and outsourcing thermal carbon emission E22;
range three E3 for indirect emissions includes: outsourcing agent carbon emission E31, outsourcing equipment carbon emission E32, upstream wastewater transport carbon emission E33, sludge outsourcing disposal carbon emission E34, downstream effluent transport carbon emission E35, business trip carbon emission E36, and employee commuting carbon emission E37;
carbon sink Er includes: the carbon of the marsh gas is recycled and is combined with Er1 and forestry carbon is combined with Er 2.
3. The method for calculating the carbon emission amount of the sewage treatment plant according to claim 2, characterized in that: calculating the carbon emissions for range one E1 of direct emissions includes: calculating CO of fossil fuel combustion 2 Is marked as
4. The method for calculating carbon emissions from a sewage treatment plant according to claim 3, wherein: calculating the carbon emissions for range one E1 of direct emissions includes: calculating carbon emission in sewage treatment process and sludge treatment process CH 4 And (3) discharging, wherein the specific calculation of carbon discharge in the sewage treatment process is as follows: calculating the generation of CO by denitrification with an external carbon source 2 Is marked as E 12aCO2 (ii) a Calculation of CH production by anaerobic digestion Process 4 Is marked as E 12bCH4 (ii) a Calculating the production of N in the denitrification process 2 O, is marked as
Calculating sludge treatment process CH 4 Is marked as
5. The method for calculating the carbon emission amount of the sewage treatment plant according to claim 2, characterized in that: calculating the carbon emissions for range two E2 of indirect emissions includes: calculating the carbon emission of the outsourcing power and recording as
Calculating the outsourcing thermal carbon emission, and recording as
6. The method for calculating carbon emissions of a sewage treatment plant according to claim 2, wherein: calculating the carbon emissions for range three E3 of indirect emissions includes: calculate carbon emissions of outsourcing agents, and record
Calculate the carbon emissions of the outsourcing equipment, record
Calculate upstream carbon emissions for wastewater transport, note
。
7. The method for calculating carbon emissions from a sewage treatment plant according to claim 6, wherein: calculating the carbon emissions for range three E3 of indirect emissions further includes:calculating the carbon emission of the outward transportation of the sludge and respectively recording the carbon emission as
And
。
8. the method for calculating carbon emissions from a sewage treatment plant according to claim 7, wherein: calculating the carbon emissions for the range three E3 of indirect emissions further includes: calculating the carbon emission of the downstream water outlet and recording the carbon emission as
Calculating carbon emissions of business travel, as
Calculate employee commute carbon emissions, note
9. The method for calculating the carbon emission amount of the sewage treatment plant according to claim 2, characterized in that: calculating the carbon emission of carbon sink Er includes:
calculating the carbon sink recovered from the biogas, and marking as
Calculating forestry carbon sink, note
10. The utility model provides a sewage treatment plant carbon emission calculation system which characterized in that: comprises the steps of (a) preparing a substrate,
a carbon discharge boundary determining module for determining the carbon discharge boundary of a sewage treatment plant, which is divided into a sewage treatment facility, a sludge treatment facility and an auxiliary structure, and calculatesComprises CH 4 、N 2 O、CO 2 ；
The carbon emission source dividing module is used for dividing a direct emission range I, an indirect emission range II, an indirect emission range III and a carbon sink according to a carbon emission boundary of a sewage treatment plant, and respectively identifying sources;
the carbon emission calculation model establishing module is used for respectively establishing emission of a range I, a range II and a range III and a reduced emission calculation model of carbon sink;
the carbon emission calculation module is used for respectively calculating the carbon emission in the first range, the second range and the third range and the emission reduction amount of the carbon sink according to the carbon emission calculation model;
and the carbon emission summarizing module summarizes the carbon emission in the first range, the second range and the third range and the emission reduction amount of carbon sink to obtain the total emission and the net emission of the sewage treatment plant.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115587478A (en) * | 2022-09-23 | 2023-01-10 | 哈尔滨工业大学（深圳） | Pollutant removal amount-based greenhouse gas emission accounting method for sewage treatment plant |
| CN115759788A (en) * | 2023-01-05 | 2023-03-07 | 碳阻迹（北京）科技有限公司 | Enterprise carbon data comprehensive intelligent management and control system based on big data analysis |
| CN116070332A (en) * | 2023-03-06 | 2023-05-05 | 南方科技大学 | Reservoir methane bubble emission modeling method, system, terminal and storage medium |
| CN116562412A (en) * | 2022-11-16 | 2023-08-08 | 广州市净水有限公司 | Low-carbon operation optimization method for sewage biological treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115587478A (en) * | 2022-09-23 | 2023-01-10 | 哈尔滨工业大学（深圳） | Pollutant removal amount-based greenhouse gas emission accounting method for sewage treatment plant |
| CN116562412A (en) * | 2022-11-16 | 2023-08-08 | 广州市净水有限公司 | Low-carbon operation optimization method for sewage biological treatment |
| CN116562412B (en) * | 2022-11-16 | 2024-02-20 | 广州市净水有限公司 | Low-carbon operation optimization method for sewage biological treatment |
| CN115759788A (en) * | 2023-01-05 | 2023-03-07 | 碳阻迹（北京）科技有限公司 | Enterprise carbon data comprehensive intelligent management and control system based on big data analysis |
| CN116070332A (en) * | 2023-03-06 | 2023-05-05 | 南方科技大学 | Reservoir methane bubble emission modeling method, system, terminal and storage medium |
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