CN115619069A - Carbon footprint accounting method and system for tea leaf whole life cycle - Google Patents
Carbon footprint accounting method and system for tea leaf whole life cycle Download PDFInfo
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Abstract
The invention discloses a carbon footprint accounting method and system for a tea leaf full life cycle, which comprises the steps of determining the accounting range of the tea leaf full life cycle as planting, processing, packaging, transporting, consuming and processing links; collecting carbon emission projects and carbon emission factors of carbon emission sources in all links, and establishing a tea leaf full life cycle carbon emission factor library; acquiring background information of each link of the whole life cycle of tea and investment information of carbon emission projects; performing data arrangement on the input information, converting the input information into activity data capable of being directly matched with the carbon emission factors, and acquiring the carbon emission factors of the carbon emission items of all links according to a carbon emission factor library; constructing a carbon emission accounting model according to the background information, the carbon emission factors and the activity data, accounting carbon emission corresponding to the background information of each link, and acquiring a carbon footprint of the whole life cycle of the tea; the invention fills the blank of the carbon footprint accounting method and system for the whole life cycle of the tea leaves, and reduces the carbon footprint accounting difficulty and the accounting time of the whole life cycle of the tea leaves.
Description
Technical Field
The invention relates to the technical field of carbon footprint, in particular to a carbon footprint accounting method and system for a tea leaf full life cycle.
Background
In the future, low-carbon production is a development trend, carbon emission generated in the life cycle of a product can be quantified through product carbon footprint accounting, and data support can be provided for product carbon neutralization certification. Generally, the accounting of the carbon footprint of a product is the accounting of the whole life cycle of the product, namely, the carbon emission generated in the whole process of acquiring raw materials and recycling the raw materials is caused, a large amount of manpower, material resources and time are needed for collecting and screening data due to the fact that a plurality of process links are involved, and the selection of the accounting range of the product is different due to the fact that actual production conditions of enterprises in different industries are different, so that the accounting difficulty is increased, and the accounting result is influenced.
In order to solve the above problems, for example, chinese patent publication No. CN114626628A discloses "a carbon emission accounting system and an accounting method thereof", which includes: the device comprises an information matching module, a data acquisition module, a carbon emission accounting module, a carbon emission analysis module and a carbon emission management module. The accounting system realizes carbon accounting of enterprises in different industries, incorporates carbon transaction information such as carbon quota and the like, and saves accounting cost and time of the enterprises, but the system is mainly designed for the enterprises with a certain production scale, has no universality for agriculture mainly based on small-scale farmer production, and simultaneously lacks full life cycle analysis on product carbon footprint.
At present, no system for performing full-life-cycle carbon footprint accounting on tea leaves exists in China, the tea leaves are agricultural products and food, so that the production process of the tea leaves is different from that of common agricultural products, the tea leaves are not only planted in the field, but also machined in an indoor factory, and therefore the difficulty of an accounting person is increased due to the fact that the accounting items are difficult to accurately distinguish in the actual accounting process.
Therefore, how to provide a method and a system for carbon footprint accounting of a tea leaf full life cycle to reduce the complexity of carbon accounting of tea leaves and lower the accounting threshold is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the invention provides a carbon footprint accounting method and system for the whole life cycle of tea leaves
In order to achieve the purpose, the invention adopts the following technical scheme:
a carbon footprint accounting method for the whole life cycle of tea leaves comprises the following steps:
s1, determining the boundary of an accounting system of the whole life cycle of tea, wherein the boundary of the accounting system is divided into six links of planting, processing, packaging, transporting, consuming and processing;
s2, collecting carbon emission projects of all links and carbon emission sources corresponding to the carbon emission projects;
s3, establishing a tea leaf full life cycle carbon emission factor library according to the carbon emission project and the carbon emission source;
s4, acquiring background information of each link of the whole life cycle of the tea and investment information of a field carbon emission project;
s5, performing data arrangement on the investment information, converting the investment information into activity data capable of being directly matched with carbon emission factors, and acquiring the carbon emission factors of the field carbon emission items of all links according to the tea leaf full life cycle carbon emission factor library;
s6, constructing a carbon emission accounting model according to the background information, the carbon emission factors and the activity data
And S7, utilizing the carbon emission accounting model to account the carbon emission corresponding to the background information in each link, and obtaining the carbon footprint of the whole life cycle of the tea.
Preferably, the carbon footprint accounting method for the tea leaf full life cycle further comprises S8, when the collected field carbon emission items are not in the tea leaf full life cycle carbon emission factor library, adding the carbon emission items and the corresponding carbon emission factors in a self-defined mode.
Preferably, the specific content of S4 is:
the method comprises the following steps of a planting link, wherein background information comprises a planting land, the age of tea trees, the annual output and a reference year, and input information comprises the total fertilizer consumption, the pesticide consumption per unit area, the pesticide application area, the trimming area, the picking area, the irrigation area and the equipment energy input amount;
the processing link comprises the background information including the name of a tea factory, the name of tea leaves, the tea processing amount of each processing device in unit time, the operation duration of each processing device and the processing days of the whole year, and the input information includes the energy input of the processing devices in unit time, including the device power, the coal dosage, the particle dosage and the natural gas dosage;
a packaging step, wherein the background information comprises the packaging amount of the tea, and the input information comprises the using amount of a packaging material;
the background information comprises a transportation place, a transportation distance and a transportation weight, and the investment information comprises transportation times;
the consumption link, the background information comprises a consumption location and the amount of the tea sold to a sales location, and the investment information comprises the amount of the tea and the amount of hot water;
and in the processing link, the background information comprises a consumption place and the amount of the tea leaves sold to a sale place, and the investment information comprises the processing amount of the tea leaves, and the amount of the tea leaves sold to the consumption place is taken as the processing amount.
Preferably, the step S5 of performing data processing on the investment information and converting the investment information into activity data capable of directly matching the carbon emission factor includes:
(1) Activity data in each carbon emission project of the planting link:
AD fertilizer i ＝Fer i ×Nut i
Wherein, AD Fertilizer i As i fertilizer activity data, fer i Is the total amount of i fertilizer, nut i The proportion of the fertilizer corresponding to the i fertilizer is reduced, and the i is the type of the fertilizer;
AD pesticide i ＝Pes i ×Are i
Wherein, AD Pesticide i As i pesticide activity data, pes i Is i unit area dose of pesticide, are i I area of pesticide application, i is pesticide category;
AD pruning i ＝Pru i ×CP i
Wherein, AD Pruning i For i trimmer Activity data, pru i Trimming area for i trimmer, CP i I energy consumption of the trimmer per unit area, i is the type of the trimmer;
wherein, AD Picking i Picking up the Activity data, pic, for i i For picking area of i picking machine, ef i Working picking area per unit time, ct, of i-picker i The energy consumption of the picking machine in unit time is represented by i, which is the type of the picking machine;
irrigation activity data AD Irrigation Equal to the irrigation area;
other engagement activity data AD Others (C) Equal to the energy consumption of the equipment.
(2) Processing activity data of the processing link:
AD processing ji ＝P ji ×T ji
Wherein, AD Processing ji For j item i device activity data, P ji For j item i machine energy consumption per unit time, T ji Averaging the one-day processing time of the j item i equipment;
(3) In the packaging step, in the packaging carbon emission project, the activity data AD of a plastic woven bag, a corrugated case and plastic packaging is material consumption, and the AD of bulk packaging and other packaging is tea packaging amount;
(4) Number of activities in the transportation segment:
AD transporting ji ＝W ji ×t ji
Wherein, AD Transporting ji For activity data of input goods in transit, W ji Distance of transport, t ji J and i are transportation items and transportation tools respectively;
(5) Activity data of consuming links:
AD consumption of ＝C Water (W) ×E Energy source i
Wherein, AD Consumption of For tea brewing activity data in consumption, C Water (I) Setting default value as 1 for drinking hot water amount of tea, E Energy i The energy consumption of hot water is divided into electric energy and natural gas;
(6) Processing activity data of the link:
AD treatment I ＝I j ×Tea
AD Treatment L ＝L j ×Tea
In the formula, AD Treatment I And AD Treatment L Respectively, activity data of processing mode, I j In order to burn the ratio of L j In terms of landfill treatment ratio, tea represents the Tea residue treatment amount, and j represents the city where the Tea residue is treated.
Preferably, the carbon emission accounting model in S6 satisfies the following relationship:
E j ＝∑ j AD ji ×EF i
wherein E is j Carbon emissions, AD, for j carbon emissions project ji Activity data of inputs for j carbon emission project i; EF i For input carbon emission factor, i.e. CO produced per input 2 eq is discharged.
Preferably, the carbon emission amount of the carbon emission item in the carbon emission accounting model specifically includes:
(1) Carbon emission in a planting link:
E plant always ＝E Fertilising +E Pesticide +E Pruning (pruning) +E Picking +E Irrigation +E Others
Wherein, E Plant always Total carbon emission for the planting stage, E Fertilising 、E Pesticide 、E Pruning (pruning) 、E Picking 、E Irrigation And E Others (C) The total emission amount of each carbon emission project in the planting link, E Unit planting Carbon emission per unit yield, and Y is the total yield of the tea leaves in the accounting range of the planting link;
(2) And (3) carbon emission in a processing link:
E machining assembly ＝(∑ i E i )×T
Wherein, E Machining assembly For the total carbon emission of the process stage, E i For the total carbon emission of each item of the processing ring, Y is the number of days of the whole year processing, E Unit processing Carbon emission per unit process, P Machining The total annual processing yield of the tea leaves in a tea factory is a processing link;
(3) And (3) carbon emission in a packaging link:
E packaging assembly ＝∑ i E i
Wherein E is Packaging assembly Total carbon emission for the packaging stage, E i Total carbon emission for each item of the packing ring, E Unit package Carbon emission per unit package, P Package (I) The amount of the tea packed all year round;
(4) Carbon emission in a transportation link:
E transportation assembly ＝∑ i E i
Wherein E is Transportation assembly For total carbon emission in the transport section, E i Total carbon emissions for each item of the transport ring, E Unit transportation Transporting carbon emissions, P, per unit Transportation of The quantity of tea leaves transported all year round;
(5) Carbon emission in a consumption link:
E consumption assembly ＝E Consumption per unit ×P Consumption i
Wherein E is Consumption per unit Carbon emission, P, for each tea making in the consumption process Tea Measuring the national average value for average tea making quantity each time, E Consumption of Carbon emission, P, for hot water produced by a single tea brew Consumption i I is the total sales volume sold to the sales site;
(6) And (3) carbon emission in a treatment link:
E unit processing ＝E I +E L
E Treatment assembly ＝E Unit cl ×P Consumption i
Wherein E is Unit processing Treatment of carbon emissions for treatment link units, E I For disposal of carbon emissions by incineration, E L Carbon emissions are disposed of for landfills.
A carbon footprint accounting system for a tea leaf full life cycle comprises a tea leaf full life cycle carbon emission factor library, an information acquisition module and a carbon footprint accounting module;
the tea leaf full life cycle carbon emission factor library comprises a system boundary range dividing unit, a historical carbon emission information acquisition unit and a database establishing unit;
the system boundary range dividing unit is used for determining the boundary of an accounting system of the whole life cycle of the tea, and the boundary of the accounting system is divided into six links of planting, processing, packaging, transporting, consuming and processing;
the historical carbon emission information acquisition unit is used for acquiring carbon emission items of all links of the whole life cycle of the tea and carbon emission sources corresponding to the carbon emission items;
the database establishing unit is used for establishing a tea leaf full life cycle carbon emission factor library according to the carbon emission project and the carbon emission source;
the information acquisition module is used for acquiring background information of each link of the whole life cycle of tea and investment information of the on-site carbon emission project, inputting the carbon emission project into the whole life cycle carbon emission factor library of the tea to acquire the carbon emission factor of the carbon emission project of each link of the whole life cycle of the tea, and sending the background information, the carbon emission factor and the investment information to the carbon footprint accounting module;
and the carbon footprint accounting module is used for carrying out data arrangement on the input information, converting the input information into activity data capable of being directly matched with a carbon emission factor, constructing a carbon emission accounting model according to the background information, the carbon emission factor and the activity data, and accounting the carbon emission corresponding to the background information in each link by using the carbon emission accounting model to obtain the carbon footprint of the tea leaf whole life cycle.
Preferably, the system for accounting carbon footprint of tea leaf full life cycle further comprises a customized adding module, which is used for adding carbon emission items and corresponding carbon emission factors in a customized manner when the collected field carbon emission items are not in the tea leaf full life cycle carbon emission factor library.
Preferably, the carbon footprint accounting module comprises a data conversion unit, a calculation unit and a display unit;
the conversion unit is used for carrying out data arrangement on the input information and converting the input information into activity data which can be directly matched with the carbon emission factors;
the computing unit is used for computing and constructing a carbon emission accounting model according to the background information, the carbon emission factors and the activity data, and computing the carbon emission corresponding to the background information of each link by using the carbon emission accounting model;
and the display unit is used for acquiring and displaying the carbon footprint of the whole life cycle of the tea according to the carbon emission corresponding to the background information in each link.
Preferably, the carbon emission accounting model satisfies the following relationship:
E j ＝∑ j AD ji ×EF i
wherein E is j Carbon emissions, AD, for j carbon emissions project ji Activity data for j carbon emission project i inputs; EF i For input carbon emission factor, i.e. CO produced per input 2 eq is discharged.
Preferably, the background information of the planting link comprises the name of a tea garden, the planting area and the age of tea trees; background information on the processing links includes the name of the tea plant and the type of tea leaves processed.
According to the technical scheme, compared with the prior art, the carbon footprint accounting method and system for the tea leaf full life cycle are disclosed, specific carbon emission items of six accounting links of tea leaf full life cycle planting, processing, packaging, transportation, consumption and treatment are combined with massive literature reference and field visit to determine emission sources in all links, an emission factor library is established, carbon emission is calculated through carbon emission factors obtained by the database and acquired investment conditions of all links of the tea leaf full life cycle, the tea leaf full life cycle carbon footprint is obtained, the blank of the tea leaf full life cycle carbon footprint accounting method and system is filled, the carbon footprint accounting difficulty and the accounting time of the tea leaf full life cycle are reduced, the uncertainty of an accounting result is reduced, meanwhile, a tea leaf carbon footprint report is generated, hot spot emission in the tea leaf life cycle and emission in different links can be directly identified, and effective countermeasures are provided for emission reduction of farmers or enterprises.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a carbon footprint accounting method for the whole life cycle of tea provided by the present invention;
FIG. 2 is a schematic diagram of carbon emission accounting of a fertilizer in a tea planting link according to the present invention;
FIG. 3 is a schematic structural diagram of a carbon footprint accounting system for the whole life cycle of tea leaves provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below 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.
The embodiment of the invention discloses a carbon footprint accounting method for a tea leaf full life cycle, which comprises the following steps as shown in figure 1:
s1, determining the boundary of an accounting system of the whole life cycle of tea, wherein the boundary of the accounting system is divided into six links of planting, processing, packaging, transporting, consuming and processing;
s2, collecting carbon emission projects of all links and carbon emission sources corresponding to the carbon emission projects;
s3, establishing a tea leaf full life cycle carbon emission factor library according to the carbon emission project and the carbon emission source;
s4, acquiring background information of each link of the whole life cycle of the tea and investment information of a field carbon emission project;
s5, performing data arrangement on the input information, converting the input information into activity data capable of being directly matched with carbon emission factors, and acquiring the carbon emission factors of field carbon emission items of all links according to a tea leaf full life cycle carbon emission factor library;
s6, constructing a carbon emission accounting model according to the background information, the carbon emission factors and the activity data
And S7, utilizing the carbon emission accounting model to account the carbon emission corresponding to the background information of each link, and obtaining the carbon footprint of the whole life cycle of the tea.
In order to further implement the technical scheme, the carbon footprint accounting method for the tea leaf full life cycle further comprises S8, when the collected field carbon emission items are not in the tea leaf full life cycle carbon emission factor library, custom adding the carbon emission items and the corresponding carbon emission factors.
In practical application, the emission factors corresponding to the emission sources mainly come from published domestic and foreign report guidelines and related academic papers; the report guidelines mainly used include '2006 year IPCC national greenhouse gas list guideline', '2019 year IPCC national greenhouse gas list guideline', 'food, tobacco, wine, beverage and refined tea enterprise greenhouse gas emission accounting method and report guideline (trial implementation)' provincial grade greenhouse gas list establishment guideline ',' Guangdong provincial prefecture county (district) greenhouse gas list establishment guideline (trial implementation) 'Chinese automobile low-carbon action plan 2021 year research achievement', 'Chinese online and offline shopping greenhouse gas emission comparative research report'; in the emission factor library, besides the emission factors can be directly obtained from corresponding data, part of the emission factors are calculated by referring to a related method, and the emission factors mainly comprise carbon emission factors of fossil fuels except natural gas in energy sources and emission factors of incineration and landfill carbon in a treatment link, and the specific calculation formula is as follows:
in the formula, EF is the emission factor kgCO of the i-th type fossil fuel 2 eq/kg，CC i The carbon content per unit heat value of the fuel i is kg/10 6 J，OF i The carbon oxidation rate of the fuel i and the NCV are the average lower calorific value 10 of the fuel i 6 J/kg,44/12 is the ratio of the molecular weight of carbon dioxide to the molecular weight of carbon, i comprises coal, diesel oil and gasoline, wherein the coal is calculated according to the bituminous coal variety;
the landfill calculation adopts a mass balance method in an IPCC guide to carry out accounting, and the calculation formula is as follows:
E CH4 ＝L o ×(1-R)×(1-OX)
E CO2 ＝E CH4 ×GWP 100
in the formula, the garbage disposal is calculated according to kitchen garbage, E CH4 Is CH of a particular year 4 Total amount of emissions (kg/y); l is 0i Is CH 4 Potential of formation (kgCH) 4 ) (ii) a MCF is CH 4 Correction factor (dimensionless) 0.96; DOC is the proportion of degradable organic carbon in the waste is 0.11; DOC f The proportion of degradable organic carbon decomposed under anaerobic condition is 0.5%; f is CH in the produced landfill gas 4 The ratio (volume ratio) was 0.5; r is the recovery of methane of 0.24; OX is CH 4 An oxidation factor of 0.1; k is a reaction rate constant of 0.18;16/12 is the CH4/C molecular weight ratio (ratio); e CO2 Carbon emissions (kgCO) for landfills 2 eq/y)；GWP 100 Has a global warming potential of 28.
The incineration calculation formula is as follows:
in the formula I CO2 CO indicating year of inventory 2 Discharge (kg/y); MSW is that the incineration amount of the municipal solid waste is set as 1; the ratio of kitchen garbage in the incineration treatment with WF is 0.41; CF is the carbon proportion in the kitchen garbage dry matter is 0.38; dm is the dry matter content of the kitchen waste of 0.4.
In order to further implement the above technical solution, the specific content of S4 is:
the method comprises the following steps of a planting link, wherein background information comprises a planting land, the age of tea trees, the annual output and a reference year, and input information comprises the total fertilizer consumption, the pesticide consumption per unit area, the pesticide application area, the trimming area, the picking area, the irrigation area and the equipment energy input amount;
in the processing link, background information comprises the name of a tea factory, the name of tea, the tea processing amount of each processing device in unit time, the operation duration of each processing device every day and the processing days of the whole year, and input information comprises energy input of the processing devices in unit time, including device power, coal dosage, particle dosage and natural gas dosage;
in the packaging step, background information comprises the packaging amount of the tea leaves, and input information comprises the using amount of packaging materials;
in the transportation link, background information comprises a transportation place, a transportation distance and a transportation weight, and investment information comprises transportation times;
in the consumption link, the background information comprises the consumption location and the quantity of tea sold to the sales location, and the input information comprises the tea consumption and the hot water quantity;
in the processing step, the background information comprises the consumption location and the amount of the tea leaves sold to the sale location, the input information comprises the tea leaf processing amount, and the amount of the tea leaves sold to the consumption location is used as the processing amount.
In order to further implement the above technical solution, the activity data is a number obtained by converting a statistical unit of the collected input material usage amount, and is a number to solve a problem that a unit of a part of the input material usage amount is different from a corresponding unit of the carbon emission factor, so that the input amount is converted into the activity data capable of directly matching the carbon emission factor, and the specific content of converting the input information into the activity data capable of directly matching the carbon emission factor by performing data arrangement in S5 includes:
(1) Activity data in each carbon emission project of the planting link:
AD fertilizer i ＝Fer i ×Nut i
Wherein, AD Fertilizer i As i fertilizer activity data (kgN/y, kgP) 2 O 5 /y，kgK 2 O/y)，Fer i Is the total amount (kg/y) of the fertilizer i, nut i I is the pure proportion of the fertilizer corresponding to the fertilizer, i is the type of the fertilizer;
AD pesticide i ＝Pes i ×Are i
Wherein, AD Pesticide i I pesticide activity data (kg), pes i I pesticide unit area (kg/ha), are i I area of pesticide application, i is pesticide category;
AD pruning i ＝Pru i ×CP i
Wherein, AD Pruning i For i trimmer Activity data (kwh, L), pru i Trimming area (ha), CP for i trimmer i Is the energy consumption per unit area (kwh/ha, m) of the i trimmer 3 /ha), i is of trimmer type;
wherein, AD Picking i Picking machine Activity data (kwh, m) for i 3 )，Pic i Picking area (ha), ef for i picker i The working picking area (ha/h), ct, of the i picking machine per unit time i The energy consumption of the picking machine in unit time is represented by i, and the type of the picking machine is represented by i;
irrigation activity data AD Irrigation Equal to the irrigation area (ha);
other engagement activity data AD Others Equal to the energy consumption of the equipment (kwh, kg, m3, L, kg).
(2) Processing activity data of the processing link:
AD processing ji ＝P ji ×T ji
Wherein, AD Processing ji For j items i device activity data (kwh/day, L/day), P ji J item i machine energy consumption per unit time (kwh, kg/h), T ji Averaging the processing time per day (h/day) of the equipment for the j item i;
(3) In the packaging step, in the packaging carbon emission project, the activity data AD of a plastic woven bag, a corrugated case and plastic packaging is material consumption, and the AD of bulk packaging and other packaging is tea packaging amount;
(4) Number of activities in the transport link:
AD transport ji ＝W ji ×t ji
Wherein, AD Transport ji Activity data (km) for input goods in transit, W ji Distance transported (km), t ji J and i are transportation items and transportation tools respectively;
(5) Activity data of consuming links:
AD consumption of ＝C Water (I) ×E Energy source i
Wherein, AD Consumption of Data on activities for brewing tea in consumption (kwh, nm) 3 )，C Water (W) The default value is set to 1,E for the amount of hot water (L) for drinking tea Energy source i The energy consumption of hot water is divided into electric energy and natural gas, and in the embodiment, the value is 0.122kwh/L and 0.016Nm 3 /L；
(6) And (3) processing activity data of a link:
AD treatment I ＝I j ×Tea
AD Treatment L ＝L j ×Tea
In the formula, AD Treatment I And AD Treatment L Activity data (kg), I in processing mode j In terms of incineration disposal ratio, L j In terms of the landfill disposal ratio, tea is the Tea residue disposal amount (kg), and j is the city where the treatment is performed.
In order to further implement the above technical solution, the carbon emission accounting model in S6 satisfies the following relationship:
E j ＝∑ j AD ji ×EF i
wherein E is j Carbon emissions, AD, for j carbon emissions project ji Activity data of inputs for j carbon emission project i; EF i For input carbon emission factor, i.e. CO produced per input 2 eq is discharged.
In order to further implement the above technical solution, the carbon emission amount of the carbon emission item in the carbon emission accounting model specifically includes:
(1) Carbon emission in a planting link:
E plant always ＝E Fertilizing +E Pesticide +E Pruning +E Picking +E Irrigation +E Others
Wherein E is Plant always Total carbon emission for the planting stage, E Fertilising 、E Pesticide 、E Pruning 、E Picking 、E Irrigation And E Others Are respectively asTotal emission of each carbon emission project in the planting process, E Planting in unit Carbon emission per unit yield, and Y is total tea yield in the accounting range of the planting link;
(2) And (3) carbon emission in a processing link:
E machining assembly ＝(∑ i E i )×T
Wherein E is Machining assembly For the total carbon emission of the process stage, E i For processing the total carbon emission of each item of the ring, Y is the number of days of processing all year round, E Machining assembly Carbon emission per unit process, P Machining The total annual processing yield of the tea leaves in a tea factory is a processing link;
(3) And (3) carbon emission in a packaging link:
E packaging assembly ＝∑ i E i
Wherein E is Packaging assembly Total carbon emission for the packaging stage, E i Total carbon emission for each item of the packing ring, E Unit package Carbon emission per unit package, P Package The amount of tea packed all year round;
(4) Carbon emission in a transportation link:
E transportation assembly ＝∑ i E i
Wherein E is Transportation assembly For total carbon emission in the transport section, E i For the total carbon emission of each item of the transport ring, E Unit transportation For unit transport of carbon emissions, P Transportation of The quantity of tea leaves transported all year round;
(5) Carbon emission in a consumption link:
E consumer total ＝E Consumption per unit ×P Consumption i
Wherein E is Consumption per unit The carbon emission P generated by each tea making in the consumption link Tea Measuring the national average value for average tea making quantity each time, E Consumption of Carbon emissions, P, for single tea brew with hot water Consumption i I is the total sales volume sold to the sales site;
(6) And (3) carbon emission in a treatment link:
E unit processing ＝E I +E L
E Treatment assembly ＝E Unit cl ×P Consumption i
Wherein E is Unit processing Treatment of carbon emissions for treatment link units, E I For disposal of carbon emissions by incineration, E L Carbon emissions are treated for landfills.
In this example, as shown in FIG. 2, N of fertilizer is used in tea planting 2 Taking carbon emission of O gas as an example, matching corresponding carbon emission factors through a tea full life cycle carbon emission factor library according to a carbon emission project, converting the input amount of the fertilizer into activity data pure nutrient content, and calculating through the following formula:
nitrogen input causes direct discharge of soil:
E d ＝AD N ×EF d ×44/28×GWP 100
wherein, EF d Is a factor for directly discharging the nitrous oxide in the soil.
Indirect discharge produced by nitrogen input:
E v ＝(ADsn×Frac SN +ADon×Frac ON )×EF v ×44/28×GWP 100
E l ＝(Fsn+Fon)×Frac L ×EF l ×44/28×GWP 100
tea garden fertilizer N 2 Carbon emissions due to O gas emission:
E N2O ＝E d +E v +E l
wherein, E d Direct carbon emission (kgCO) of tea garden soil 2 eq)，AD N The dosage of nitrogen nutrient (kgN), EF d Soil N of tea garden 2 The direct O emission coefficient is 1.92 percent, and the GWP 100 A global warming potential of 100 years, 265,E v The nitrogen volatilization sedimentation carbon emission amount of the tea garden is obtained; ADsn is nitrogen fertilizer and nitrogen nutrient consumption (kgN) of the compound fertilizer; ADon is the dosage of organic fertilizer nitrogen nutrient; frac SN The ratio of the volatilization and sedimentation of the nitrogen nutrients of the fertilizer is 11 percent; frac ON The ratio of the volatilization and sedimentation of the nitrogen nutrients in the organic fertilizer is 21 percent; EF v The discharge coefficient of volatilization and sedimentation is 1 percent; e l The emission amount of the nitrogen nutrient leaching runoff carbon is reduced; frac L The leaching runoff ratio of nitrogen nutrient is 24 percent; EF is leaching runoff discharge coefficient which is 1.1%; e N2O Is a tea garden reason N 2 O emission to generate carbon emission (kgCO) 2 eq); 44/28 is a table showing conversion of N emission amount to N 2 O。
A carbon footprint accounting system for the whole life cycle of tea leaves is shown in figure 3 and comprises a tea leaf whole life cycle carbon emission factor library, an information acquisition module and a carbon footprint accounting module;
the tea leaf full life cycle carbon emission factor library comprises a system boundary range dividing unit, a historical carbon emission information acquisition unit and a database establishing unit;
the system boundary range dividing unit is used for determining the boundary of an accounting system of the whole life cycle of the tea, and the boundary of the accounting system is divided into six links of planting, processing, packaging, transportation, consumption and treatment;
the historical carbon emission information acquisition unit is used for acquiring carbon emission items of all links of the whole life cycle of the tea and carbon emission sources corresponding to the carbon emission items;
the database establishing unit is used for establishing a tea leaf full life cycle carbon emission factor library according to the carbon emission project and the carbon emission source;
the information acquisition module is used for acquiring background information and investment information of carbon emission items of all links of the tea leaf full life cycle, inputting the carbon emission items into a tea leaf full life cycle carbon emission factor library to acquire carbon emission factors of the carbon emission items of all links of the tea leaf full life cycle, and sending the background information, the carbon emission factors and the investment information to the carbon footprint accounting module;
and the carbon footprint accounting module is used for carrying out data arrangement on the input information, converting the input information into activity data which can be directly matched with the carbon emission factors, establishing a carbon emission accounting model according to the background information, the carbon emission factors and the activity data accounting, and accounting the carbon emission corresponding to the background information in each link by using the carbon emission accounting model to obtain the carbon footprint of the whole life cycle of the tea.
In order to further implement the technical scheme, the carbon footprint accounting system for the tea leaf full life cycle further comprises a custom adding module, wherein the custom adding module is used for custom adding the carbon emission item and the corresponding carbon emission factor when the collected field carbon emission item is not in the tea leaf full life cycle carbon emission factor library.
In order to further implement the above technical solution, the carbon footprint accounting module includes a data conversion unit, a calculation unit and a display unit;
the conversion unit is used for carrying out data arrangement on the input information and converting the input information into activity data which can be directly matched with the carbon emission factors;
the computing unit is used for building a carbon emission accounting model according to background information, carbon emission factors and activity data accounting, and accounting the carbon emission corresponding to the background information in each link by using the carbon emission accounting model;
and the display unit is used for acquiring and displaying the carbon footprint of the whole life cycle of the tea according to the carbon emission corresponding to the background information of each link.
In order to further implement the above technical solution, the carbon emission accounting model satisfies the following relationship:
E j ＝∑ j AD ji ×EF i
wherein E is j Carbon emissions, AD, for j carbon emissions project ji Number of events invested for j carbon emission item iAccordingly; EF i For input carbon emission factor, i.e. CO produced per input 2 eq is discharged.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A carbon footprint accounting method for the whole life cycle of tea is characterized by comprising the following steps:
s1, determining the boundary of an accounting system of the whole life cycle of tea, wherein the boundary of the accounting system is divided into six links of planting, processing, packaging, transporting, consuming and processing;
s2, collecting carbon emission projects of all links and carbon emission sources corresponding to the carbon emission projects;
s3, establishing a tea leaf full life cycle carbon emission factor library according to the carbon emission project and the carbon emission source;
s4, acquiring background information of each link of the whole life cycle of the tea and investment information of a field carbon emission project;
s5, performing data arrangement on the investment information, converting the investment information into activity data capable of being directly matched with carbon emission factors, and acquiring the carbon emission factors of the field carbon emission items of all links according to the tea leaf full life cycle carbon emission factor library;
s6, constructing a carbon emission accounting model according to the background information, the carbon emission factors and the activity data;
and S7, utilizing the carbon emission accounting model to account the carbon emission corresponding to the background information in each link, and obtaining the carbon footprint of the whole life cycle of the tea.
2. The tea leaf full-life-cycle carbon footprint accounting method according to claim 1, further comprising S8, when the collected field carbon emission items are not in the tea leaf full-life-cycle carbon emission factor library, custom adding the carbon emission items and the corresponding carbon emission factors.
3. The method for accounting for the carbon footprint of the whole life cycle of tea leaves according to claim 1, wherein the specific contents of S4 are as follows:
the method comprises the following steps of a planting link, wherein background information comprises a planting land, the age of tea trees, the annual output and a reference year, and input information comprises the total fertilizer consumption, the planting area of the tea trees, the pesticide consumption per unit area, the pesticide application area, the trimming area, the picking area, the irrigation area and the equipment energy input amount;
the processing link comprises the background information including the name of a tea factory, the name of tea leaves, the tea processing amount of each processing device in unit time, the operation duration of each processing device and the processing days of the whole year, and the input information includes the energy input of the processing devices in unit time, including the device power, the coal dosage, the particle dosage and the natural gas dosage;
a packaging step, wherein the background information comprises the packaging amount of the tea, and the input information comprises the using amount of a packaging material;
the background information comprises a transportation place, a transportation distance and a transportation weight, and the investment information comprises transportation times;
the consumption link, the background information comprises the consumption location and the amount of the tea sold to the sales location, and the investment information comprises the usage amount of the tea and the amount of hot water;
and in the processing link, the background information comprises a consumption place and the amount of the tea leaves sold to a sale place, and the investment information comprises the tea leaf processing amount, and the amount of the tea leaves sold to the consumption place is taken as the processing amount.
4. The method for carbon footprint accounting of tea leaf whole life cycle according to claim 1, wherein the step of S5, the step of performing data processing on the investment information to convert the investment information into specific content of activity data capable of directly matching with carbon emission factors comprises the following steps:
(1) Activity data in each carbon emission project of the planting link:
AD fertilizer i ＝Fer i ×Nut i
Wherein, AD Fertilizer i As i fertilizer activity data, fer i Is the total amount of i fertilizer, nut i I is the pure proportion of the fertilizer corresponding to the fertilizer, i is the type of the fertilizer;
AD pesticide i ＝Pes i ×Are i
Wherein, AD Pesticide i I pesticide activity data, pes i Is i unit area dose of pesticide, are i I area of pesticide application, i is pesticide category;
AD pruning i ＝Pru i ×CP i
Wherein, AD Pruning i For i trimmer Activity data, pru i For i trimmer trimming area, CP i I energy consumption of the trimmer per unit area, i is the type of the trimmer;
wherein, AD Picking i Picking up the Activity data, pic, for i i For picking area of i picking machine, ef i Working picking area per unit time, ct, of i-picker i The energy consumption of the picking machine in unit time is represented by i, and the type of the picking machine is represented by i;
irrigation Activity data AD Irrigation Equal to the irrigation area;
other engagement activity data AD Others (C) Equal to the energy consumption of the equipment.
(2) Processing activity data of the processing link:
AD processing ji ＝P ji ×T ji
Wherein, AD Processing ji For j item i device activity data, P ji For j item i machine energy consumption per unit time, T ji Averaging the one-day processing time of the j item i equipment;
(3) In the packaging step, in the packaging carbon emission project, the activity data AD of a plastic woven bag, a corrugated case and plastic packaging is material consumption, and the AD of bulk packaging and other packaging is tea packaging amount;
(4) Number of activities in the transportation segment:
AD transport i ＝W ji ×t ji
Wherein, AD Transport ji For activity data of input goods in transit, W ji Distance of transport, t ji J and i are transportation items and transportation tools respectively;
(5) Activity data of consuming links:
AD consumption of ＝C Water (W) ×E Energy source i
Wherein, AD Consumption of For tea brewing activity data in consumption, C Water (W) Setting the default value to 1,E for the amount of hot water for drinking tea Energy source i The energy consumption of hot water is divided into electric energy and natural gas;
(6) And (3) processing activity data of a link:
AD treatment I ＝I j ×Tea
AD Treatment L ＝L j ×Tea
In the formula, AD Treatment I And AD Treatment L Respectively, activity data of processing mode, I j In order to burn the ratio of L j In terms of landfill treatment ratio, tea represents the Tea residue treatment amount, and j represents the city where the Tea residue is treated.
5. The method for carbon footprint accounting for tea leaf full life cycle according to claim 1, wherein the carbon emission accounting model in S6 satisfies the following relationship:
E j ＝∑ j AD ji ×EF i
wherein E is j Carbon emissions, AD, for j carbon emissions project ji Activity data for j carbon emission project i inputs; EF i For input carbon emission factor, i.e. CO produced per input 2 eq is discharged.
6. The method for carbon footprint accounting for tea leaf full life cycle according to claim 5, wherein the carbon emission amount of the carbon emission item in the carbon emission accounting model specifically comprises:
(1) Carbon emission in a planting link:
E plant always ＝E Fertilizing +E Pesticide +E Pruning +E Picking +E Irrigation +E Others
Wherein E is Plant always Total carbon emission for the planting stage, E Fertilizing 、E Pesticide 、E Pruning 、E Picking 、E Irrigation And E Others The total emission amount of each carbon emission project in the planting link, E Planting in unit Carbon emission per unit yield, and Y is total tea yield in the accounting range of the planting link;
(2) And (3) carbon emission in a processing link:
E machining assembly ＝(∑ i E i )×T
Wherein, E Machining assembly For the total carbon emission in the process, E i For the total carbon emission of each item of the processing ring, Y is the number of days of the whole year processing, E Unit processing Carbon emission per unit process, P Machining The total annual processing yield of the tea leaves in a tea factory is a processing link;
(3) And (3) carbon emission in a packaging link:
E packaging assembly ＝∑ i E i
Wherein E is Coating slurry assembly Total carbon emission for the packaging stage, E i For packing the total carbon emission of each item of the ring, E Single-position pulp coating Carbon emission per unit package, P Package (I) The amount of the tea packed all year round;
(4) Carbon emission in a transportation link:
E transportation assembly ＝∑ i E i
Wherein E is Transportation assembly For total carbon emission in the transport section, E i For the total carbon emission of each item of the transport ring, E Unit transportation For unit transport of carbon emissions, P Transportation of The amount of tea leaves transported throughout the year;
(5) Carbon emission in a consumption link:
E consumer total ＝E Consumption per unit ×P Consumption i
Wherein, E Consumption per unit The carbon emission P generated by each tea making in the consumption link Tea Measuring the national average value, P, of tea leaves for each time Consumption i Carbon emissions, P, for single tea brew with hot water Consumption i I is the total sales volume sold to the sales site;
(6) And (3) carbon emission in a treatment link:
E unit processing ＝E I +E L
E Treatment assembly ＝E Unit cl ×P Consumption i
Wherein, E Unit processing Treatment of carbon emissions for treatment link units, E I For disposal of carbon emissions by incineration, E L Carbon emissions are disposed of for landfills.
7. A carbon footprint accounting system of a tea leaf full life cycle is based on the carbon footprint accounting method of the tea leaf full life cycle of any one of claims 1 to 6, and is characterized by comprising a tea leaf full life cycle carbon emission factor library, an information acquisition module and a carbon footprint accounting module;
the tea leaf full life cycle carbon emission factor library comprises a system boundary range dividing unit, a historical carbon emission information acquisition unit and a database establishing unit;
the system boundary range dividing unit is used for determining the boundary of an accounting system of the whole life cycle of the tea, and the boundary of the accounting system is divided into six links of planting, processing, packaging, transporting, consuming and processing;
the historical carbon emission information acquisition unit is used for acquiring carbon emission items of all links of the whole life cycle of the tea and carbon emission sources corresponding to the carbon emission items;
the database establishing unit is used for establishing a tea leaf full life cycle carbon emission factor library according to the carbon emission project and the carbon emission source;
the information acquisition module is used for acquiring background information of each link of the whole life cycle of tea and investment information of the carbon emission items, inputting the carbon emission items into the whole life cycle carbon emission factor library of the tea to acquire carbon emission factors of the carbon emission items of each link of the whole life cycle of the tea, and sending the background information, the carbon emission factors and the investment information to the carbon footprint accounting module;
and the carbon footprint accounting module is used for carrying out data arrangement on the input information, converting the input information into activity data which can be directly matched with a carbon emission factor, constructing a carbon emission accounting model according to the background information, the carbon emission factor and the activity data, and accounting the carbon emission corresponding to the background information in each link by using the carbon emission accounting model to obtain the carbon footprint of the whole life cycle of the tea.
8. The tea full-life-cycle carbon footprint accounting system according to claim 7, further comprising a custom addition module for custom adding a carbon emission item and a corresponding carbon emission factor when the collected field carbon emission item is not in the tea full-life-cycle carbon emission factor library.
9. The tea full life cycle carbon footprint accounting system of claim 7, wherein said carbon footprint accounting module comprises a data conversion unit, a calculation unit and a display unit;
the conversion unit is used for carrying out data arrangement on the input information and converting the input information into activity data which can be directly matched with the carbon emission factors;
the computing unit is used for constructing a carbon emission accounting model according to the background information, the carbon emission factors and the activity data, and accounting the carbon emission corresponding to the background information in each link by using the carbon emission accounting model;
and the display unit is used for acquiring and displaying the carbon footprint of the whole life cycle of the tea according to the carbon emission corresponding to the background information in each link.
10. The tea full life cycle carbon footprint accounting system of claim 8, wherein said carbon emission accounting model satisfies the following relationship:
E j ＝∑ j AD ji ×EF i
wherein E is j Carbon emissions, AD, for j carbon emissions project ji Activity data for j carbon emission project i inputs; EF i For input carbon emission factor, i.e. CO produced per input 2 eq is discharged.
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