A method for calculating carbon emissions during the entire life cycle of sucrose products

Abstract

The present invention discloses a method for calculating the carbon emissions throughout the life cycle of a sucrose product. The method comprises the following steps: S1, determining the objectives of carbon emissions calculation for the sucrose product and the functional unit of carbon footprint calculation; S2, drawing the production process flow chart of the sucrose product and determining its carbon emission boundary; S3, determining the CO2 emission sources in each link of sucrose production and processing, collecting the corresponding data, and sorting out the input-output data information obtained; S4, selecting the carbon emission factors for each item throughout the life cycle of the sucrose product; S5, constructing a carbon emissions calculation model for the entire life cycle of the sucrose product; S6, using the carbon emissions calculation model to calculate the carbon emission data of each link to obtain the carbon footprint of the sucrose product. The present invention can scientifically, objectively and comprehensively calculate the carbon emissions throughout the life cycle of the sucrose product, help sucrose enterprises analyze the key points of carbon emissions, identify the directions of carbon emission reduction, and achieve the purpose of environmental protection.

Description

Technical Field

[0001] The present invention belongs to the field of sucrose production and processing, and relates to a method for calculating carbon emissions during the entire life cycle of a sucrose product. Background Art

[0002] Sugar is an important and irreplaceable product in the global food processing industry. Therefore, establishing a set of accurate carbon emission measurement methods for sugarcane products throughout their life cycle can provide accurate carbon data management for companies and regulatory authorities, while also providing accurate data support for uncertainties in the general version of carbon emission accounting standards.

[0003] CN115619069A discloses a method and system for calculating the carbon footprint of tea throughout its life cycle, including determining that the measurement scope of the tea throughout its life cycle is tea planting, processing, product packaging, transportation, consumption and processing; collecting carbon emission factors of carbon emission projects and carbon emission sources in each link, and establishing a carbon emission factor library for the entire life cycle of tea. However, this method is mainly aimed at the carbon emission accounting of tea products, which is quite different from the production and processing links of sucrose products, and the selection of carbon emission factors is not universal.

[0004] The whole process of sugarcane production and processing, from sugarcane in the field to the appearance of sugarcane products, is very complex. On the one hand, it includes the carbon emission and carbon storage process of crops, and on the other hand, it includes the carbon emission and carbon storage process of the sugar factory process. Therefore, it is very necessary to establish a carbon emission measurement method for the whole life cycle of sugarcane products. Summary of the invention

[0005] The purpose of the present invention is to provide a method for calculating carbon emissions over the entire life cycle of sucrose products, which is used for calculating the carbon emissions of the sucrose industry. 2 Emission management and analysis provide certain methodological support for carbon emission measurement and carbon verification of various sugarcane enterprises.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A method for calculating carbon emissions during the entire life cycle of a sucrose product comprises the following steps:

[0008] Step S1, determining the target of carbon emission measurement of sugarcane products and the functional unit of carbon footprint measurement;

[0009] Step S2, drawing a production process flow chart of sucrose products and determining its carbon emission boundary;

[0010] Step S3: Determine the CO2 content of each link in the production and processing of sucrose 2 Emission sources and collect corresponding data, and organize the input-output data information obtained;

[0011] Step S4: Based on the activity data of the whole life cycle of sucrose products, select the carbon emission factors of each project in the whole life cycle of sucrose products in accordance with PAS2050 and ISO14067;

[0012] Step S5: construct a carbon emission calculation model for the entire life cycle of sucrose products based on the background information of sucrose products and the carbon emission factors and activity data of each link;

[0013] Step S6: Calculate the carbon emission data of each link using the constructed carbon emission calculation model for the entire life cycle of the sucrose product, so as to obtain the carbon footprint of the sucrose product.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The present invention can scientifically, objectively and comprehensively calculate the carbon emissions of sugarcane products throughout their life cycle, help sugarcane enterprises analyze key points of carbon emissions, identify the direction of carbon emission reduction flows, quantitatively calculate carbon emission intensity, and achieve the goal of low-carbon green development. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the production process flow chart of sugarcane products. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described below in conjunction with the accompanying drawings, but is not limited thereto. Any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be included in the protection scope of the present invention.

[0018] The present invention provides a method for calculating carbon emissions during the entire life cycle of a sucrose product, the method comprising the following steps:

[0019] Step S1, determining the target of carbon emission measurement of sugarcane products and the functional unit of carbon footprint measurement.

[0020] In this step, the goals of carbon emission calculation include: obtaining carbon emission data for the entire life cycle of sugarcane products, understanding the distribution of carbon emissions of sugarcane products in each link, and examining the carbon emission impact of the industry from the perspective of carbon emission reduction.

[0021] In this step, the functional unit of carbon footprint measurement is the carbon emissions of sugarcane products produced by sugarcane enterprises, in kgCO 2 eq / kg sucrose product.

[0022] Step S2: Draw a full production process flow chart of sucrose products and determine the carbon emission calculation boundary.

[0023] In this step, the whole life cycle of sugarcane products is complex. According to the flow direction of direct carbon emissions in each link, it can be decomposed into carbon emission units with clear relationships and boundaries. The production process of sugarcane products is drawn and its boundary range is determined. The specific links and ranges are shown in Figure 1 The carbon emission calculation boundaries include: planting stage (sugarcane planting, sugarcane growth, sugarcane harvesting, sugarcane transportation), production and processing stage (sugarcane processing, waste treatment, boiler combustion, steam power generation), product packaging stage (sugar packaging), among which the most complex unit "sugarcane processing" includes: sugarcane pretreatment, sugarcane pressing, sugarcane juice purification, sugarcane juice evaporation, sugar boiling, honey separation, drying, bagasse packaging and other links.

[0024] Step S3: Determine the CO2 content of each link in the production and processing of sucrose 2 Identify emission sources and collect corresponding data, and organize the input-output data information obtained.

[0025] In this step, activity data is collected through investigation, and the collection content includes the following aspects:

[0026] (1) Sugarcane planting stage: Specific activity information includes the type of fertilizer used per ton of sugarcane in the sugarcane production area of ​​the production enterprise, the amount of fertilizer used, the oil consumption for sowing, the oil consumption for harvesting, and the oil consumption for transportation;

[0027] (2) Production and processing stage: Specific activity information includes the amount of additives used per ton of sugarcane (mainly calcium oxide, sulfur and phosphorus pentoxide), the total electricity consumption of the enterprise, the amount of electricity transmitted to (or purchased from) the power grid, the amount of water consumed per ton of sugarcane, the amount of waste orange juice, and the amount of waste filter mud; the boiler burns sugarcane bagasse, which is the carbon offset of sugarcane growth and combustion. The "carbon emission" of this link is zero, but there is carbon storage in slag and fly ash;

[0028] (3) Product packaging stage: Specific activity information includes the amount of packaging materials used per ton of cane sugar produced;

[0029] (4) Product storage stage: Specific activity information includes the amount of sucrose produced per ton and the ratio of sucrose to sugarcane.

[0030] Step S4: Based on the activity data of the whole life cycle of sucrose products, select the carbon emission factors of each link in the whole life cycle of sucrose products in accordance with PAS2050 and ISO14067.

[0031] Step S5: construct a carbon emission calculation model for the entire life cycle of sucrose products based on the background information of sucrose products and the carbon emission factors and activity data of each link.

[0032] In this step, the carbon emission calculation model for the entire life cycle of sugarcane products also includes the collected on-site carbon emission items, and the custom added carbon emission items and the corresponding measured carbon emission factors. The remaining carbon emission equivalent coefficients come from the "IPCC Greenhouse Gas Inventory Guidelines (2009)" and the "Corporate Greenhouse Gas Emissions Accounting Methods and Reporting Guidelines for Power Generation Facilities" (Environmental Office Climate

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[0033] Table 1

[0034] name Carbon emission factor unit Average power supply of regional power grid 0.8042 <![CDATA[kgCO 2 e / MWh]]> Calcium Oxide 0.8500 <![CDATA[kgCO 2 and / kg]]> sulfur 0.4090 <![CDATA[kgCO 2 and / kg]]> Phosphorus pentoxide 0.6360 <![CDATA[kgCO 2 and / kg]]> plastic 0.7498 <![CDATA[kgCO 2 and / kg]]>

[0035] In this step, the carbon emission calculation model for the entire life cycle of sucrose products is constructed as follows:

[0036] C all =C 1 +C 2 +C 3 -C 4

[0037] Where: C all The carbon emissions of each kilogram of sucrose product in its entire life cycle are expressed in kilograms of carbon dioxide equivalent per kilogram of sucrose product (kgCO 2 eq / kg sucrose product); C 1 Carbon emissions per kilogram of sugarcane product during the sugarcane planting stage, in kilograms of carbon dioxide equivalent per kilogram of sugarcane product (kgCO 2 eq / kg sucrose product); C 2 Carbon emissions per kilogram of sucrose product during the production and processing stage, in kilograms of carbon dioxide equivalent per kilogram of sucrose product (kgCO 2 eq / kg sucrose product); C 3 Carbon emissions per kilogram of sucrose product during the packaging stage, in kilograms of carbon dioxide equivalent per kilogram of sucrose product (kgCO 2 eq / kg sucrose product); C 4 The carbon storage capacity of each kilogram of sucrose product during the storage stage is expressed in kilograms of carbon dioxide equivalent per kilogram of sucrose product (kgCO 2 eq / kg sucrose product).

[0038] In this step, the calculation method for carbon emissions at each stage of sucrose production is as follows:

[0039] (1) Sugarcane planting stage: mainly includes carbon emissions from the application of chemical fertilizers (nitrogen fertilizers, compound fertilizers, urea, etc.), mechanical sowing, harvesting and fuel carbon emissions from automobile transportation. The calculation formula is:

[0040] C 1 =C i +C w

[0041] Where: C i Carbon emissions generated by applying fertilizers per kilogram of sucrose product, expressed in kilograms of carbon dioxide equivalent per kilogram of sucrose product (kgCO 2 eq / kg sucrose product); C w Carbon emissions generated by fuel carbon emissions per kilogram of sucrose product, in kilograms of carbon dioxide equivalent per kilogram of sucrose product (kgCO 2 eq / kg sucrose product).

[0042] C i The calculation formula is:

[0043]

[0044] Where: AR i is the input amount of the ith fertilizer per ton of sugarcane, in tons / ton of sugarcane (t / t sugarcane); c i is the received carbon content of the i-th fertilizer (e.g. urea CON 2 H 4 The number of carbon atoms is 1); M i is the molar mass of the ith fertilizer, in grams per mole (G / mol); A is the ratio of the sucrose product to sugarcane produced by the enterprise (%, sucrose product / sugarcane).

[0045] C w The calculation formula is:

[0046]

[0047] Where: e d The carbon emission coefficient of the energy (diesel, gasoline, etc.) consumed in the transportation process, expressed in tons of carbon dioxide equivalent per ton (tCO 2 / t); W m The average fuel consumption per kilometer during transportation, measured in tons per kilometer (t / km); L m It is the average transportation length of each ton of sugarcane during transportation, and its unit is kilometers per ton of sugarcane (km / t sugarcane).

[0048] (2) Production and processing stage: mainly includes sugarcane pretreatment, sugarcane pressing, sugarcane juice purification, sugarcane juice evaporation, sugar boiling, honey separation, drying, bagasse packaging, and packaging. Its carbon emissions are indirect carbon emissions caused by the net difference between external electricity and self-generated electricity. There are additives in the sugarcane juice purification stage, which produces CO 2Calculation is required. Orange juice and filter mud are produced in the process, which brings carbon storage. At the same time, water is used in the production and processing process, but its use process is recycled and the amount used is small, so the carbon emissions generated can be ignored. The calculation formula is:

[0049] C 2 =C e +C m -C f

[0050] Where: C e The carbon emissions generated by net electricity difference per kilogram of sucrose product are expressed in kilograms of carbon dioxide equivalent per kilogram of sucrose product (kgCO 2 eq / kg sucrose product); C m The carbon emissions generated by the use of additives per kilogram of sucrose product are expressed in kilograms of carbon dioxide equivalent per kilogram of sucrose product (kgCO 2 eq / kg sucrose product; C f The carbon storage brought by the production of orange juice and filter mud per kilogram of sucrose product, in kilograms of carbon dioxide equivalent per kilogram of sucrose product (kgCO 2 eq / kg sucrose product).

[0051] C e The calculation formula is:

[0052]

[0053] Where: AD 电网用量 AD is the self-consumption of electricity per ton of sugarcane, in KWh / t sugarcane; 外送 It is the amount of electricity delivered (purchased) to the power grid per ton of sugarcane, with delivery being positive and purchase being negative, and the unit is kilowatt-hour / ton of sugarcane (KWh / t sugarcane); EF 电 is the average annual power supply emission factor of the regional power grid, tCO 2 / MWh.

[0054] C m The calculation formula is:

[0055]

[0056] In the formula: o i is the carbon emission coefficient of the ith additive, expressed in tons of carbon dioxide equivalent per ton (tCO 2 / t,tCO 2 / kWh); AO i It is the input amount of the ith additive per ton of sugarcane, and the unit is ton / ton of sugarcane (t / t sugarcane).

[0057] C f The calculation formula is:

[0058]

[0059] Where: AJ is the carbon content per ton of sugarcane sugar water; N J is the amount of sugar juice obtained from each ton of sugarcane squeezed, in tons / ton of sugarcane (t / t sugarcane); AL is the carbon content per unit filter mud obtained from each ton of sugarcane; N L It is the amount of filter mud obtained from each pressing of each ton of sugarcane, with the unit of ton / ton of sugarcane (t / t sugarcane).

[0060] (3) Product packaging stage: The sugar product is packaged. The calculation formula is as follows:

[0061]

[0062] Where: C 3 Carbon emissions generated by the use of plastic packaging per kilogram of sucrose product, expressed in kilograms of carbon dioxide equivalent per kilogram of sucrose product (kgCO 2 eq / kg sucrose product); c 包 is the carbon emission coefficient of sugarcane product packaging bags, in tons of carbon dioxide equivalent per ton (tCO 2 / t);AP 包 It is the amount of packaging bags for sucrose products per ton of sugarcane, with the unit of ton / ton of sugarcane (t / t sugarcane).

[0063] (4) Product storage stage: After a series of production, processing and packaging steps, the corresponding sucrose products are obtained, which brings a certain amount of carbon storage. The calculation formula is as follows:

[0064]

[0065] Where: C 4 It is the carbon storage brought by the production of sucrose products (white sugar, brown sugar, etc.) per kilogram of sucrose product, expressed in kilograms of carbon dioxide equivalent per kilogram of sucrose product (kgCO 2 eq / kg sucrose product); AT i is the received carbon content of the ith sucrose product produced from each ton of sugarcane; N i It is the output of the i-th sucrose product produced per ton of sugarcane (t / t sugarcane).

[0066] Step S6: Calculate the carbon emission data of each link using the constructed carbon emission estimation model for the whole life cycle of sucrose products, so as to obtain the carbon footprint of the sucrose products.

[0067] Example:

[0068] This embodiment calculates the carbon emission data of a typical sugar-making enterprise in Guangxi based on the 2021-2022 sugar-making season information by using the carbon emission measurement method for the entire life cycle of sucrose products.

[0069] The first step is to determine the targets and functional units for carbon emission measurement of sugarcane products.

[0070] The object of carbon emission calculation is the sugar products produced by the sugar-making enterprise in 2021-2022. The calculation goal is to obtain the carbon emission data of the entire life cycle of sugar products, grasp the distribution of carbon emissions of sugar products in each link, and examine the carbon emission impact of the industry from the perspective of low-carbon emission reduction.

[0071] The second step is to determine the carbon emission accounting boundaries as the production and processing stage, sugarcane planting stage, and product packaging stage. Figure 1 shown.

[0072] Step 3: Determine the CO2 content of each link in sugarcane production and processing 2 Identify emission sources and collect corresponding data, and organize the input-output data information obtained.

[0073] After the data collection is completed, the method proposed in the present invention is used to calculate the carbon emissions over the entire life cycle, and the calculation results are shown in Table 2.

[0074] Table 2

[0075]

[0076]

Claims

1. A method for calculating carbon emissions during the entire life cycle of sucrose products. Features The method comprises the following steps: Step S1, determining the target of carbon emission measurement of sugarcane products and the functional unit of carbon footprint measurement; Step S2, drawing a production process flow chart of sucrose products and determining its carbon emission boundary; Step S3: Determine the CO2 content of each link in the production and processing of sucrose 2 Emission sources and collect corresponding data, and organize the input-output data information obtained; Step S4: Based on the activity data of the whole life cycle of sucrose products, select the carbon emission factors of each project in the whole life cycle of sucrose products in accordance with PAS2050 and ISO14067; Step S5: construct a carbon emission calculation model for the entire life cycle of sucrose products based on the background information of sucrose products and the carbon emission factors and activity data of each link. The carbon emission calculation model for the entire life cycle of sucrose products is: C all =C 1 +C 2 +C 3 -C 4 Where: C all is the carbon emission of each kilogram of sucrose product in its entire life cycle; C 1 is the carbon emission per kilogram of sugarcane product during the sugarcane planting stage; C 2 is the carbon emission per kilogram of sucrose product during the production and processing stage; C 3 is the carbon emission of each kilogram of sucrose product during the product packaging stage; C 4 It is the carbon storage amount of each kilogram of sucrose product during the product storage stage; The C 1 The calculation formula is: C 1 =C i +C w Where: C i C is the carbon emission generated by applying fertilizers per kilogram of sugarcane product; w The carbon emissions generated by fuel carbon emissions per kilogram of sucrose product; The C 2 The calculation formula is: C 2 =C e +C m -C f Where: C e C is the carbon emission generated by net electricity difference per kilogram of sucrose product; m C is the carbon emissions generated by the use of additives per kilogram of sucrose product; f Carbon storage for each kg of cane sugar produced through the production of orange juice and filter mud; The C 3 The calculation formula is as follows: Where: c 包 is the carbon emission coefficient of sugarcane product packaging bags; AP 包 is the input amount of packaging bags for sucrose products per ton of sugarcane; A is the ratio of sucrose products to sugarcane produced by the enterprise; The C 4 The calculation formula is as follows: Where: AT i is the received carbon content of the i-th sucrose product produced from each ton of sugarcane; N i is the output of the i-th sucrose product produced per ton of sugarcane each time; A is the ratio of the sucrose product produced by the enterprise to sugarcane; Step S6: Calculate the carbon emission data of each link using the constructed carbon emission calculation model for the entire life cycle of the sucrose product, so as to obtain the carbon footprint of the sucrose product.

2. The method for calculating carbon emissions during the entire life cycle of sucrose products according to claim 1, Features In step S1, the objectives of carbon emission measurement include: obtaining carbon emission data for the entire life cycle of sucrose products, understanding the distribution of carbon emissions of sucrose products in various links, and examining the carbon emission impact of the industry from the perspective of energy conservation and emission reduction.

3. The method for calculating carbon emissions during the entire life cycle of sucrose products according to claim 1, Features In step S1, the functional unit for carbon footprint calculation is the carbon emissions of white sugar produced by Guangxi sugarcane industry, in kgCO 2 eq / kg white sugar.

4. The method for calculating carbon emissions during the entire life cycle of sucrose products according to claim 1, Features In step S2, the carbon emission accounting boundary includes: production and processing stage, sugarcane planting stage, and product packaging stage, wherein: The production and processing stages include: sugarcane planting, sugarcane growing, sugarcane harvesting, and sugarcane transportation; The sugarcane planting stage includes: sugarcane processing, waste treatment, boiler combustion, steam power generation; The product packaging stage includes: sugar packaging; Sugarcane processing includes: sugarcane pretreatment, sugarcane pressing, sugarcane juice purification, sugarcane juice evaporation, sugar boiling, honey separation, drying, and bagasse packaging.

5. The method for calculating carbon emissions during the entire life cycle of sucrose products according to claim 1, Features In step S3, the activity data is collected through investigation, and the collected content includes the following aspects: (1) Sugarcane planting stage: Specific activity information includes the type of fertilizer used per ton of sugarcane in the sugarcane production area of ​​the production enterprise, the amount of fertilizer used, the oil consumption for sowing, the oil consumption for harvesting, and the oil consumption for transportation; (2) Production and processing stage: Specific activity information includes the amount of additives used per ton of sugarcane, the total amount of electricity used by the enterprise, the amount of electricity delivered to or purchased from the power grid, the amount of water used per ton of sugarcane, the amount of waste orange juice, and the amount of waste filter mud; (3) Product packaging stage: Specific activity information includes the amount of packaging materials used for each ton of cane sugar produced; (4) Product storage stage: Specific activity information includes the amount of sucrose produced per ton and the ratio of sucrose to sugarcane.

6. The method for calculating carbon emissions during the entire life cycle of sucrose products according to claim 1, Features The C i The calculation formula is: Where: AR i is the input amount of the i-th fertilizer per ton of sugarcane; c i is the received carbon content of the i-th fertilizer; M i is the molar mass of the i-th fertilizer; A is the ratio of the sucrose product produced by the enterprise to sugarcane; C w The calculation formula is: Where: e d W is the carbon emission coefficient of the energy consumed in the transportation process; m is the average fuel consumption per kilometer during transportation; L m It is the average transportation length of each ton of sugarcane.

7. The method for calculating carbon emissions during the entire life cycle of sucrose products according to claim 1, Features The C e The calculation formula is: Where: AD 电网用量 AD is the self-consumption of electricity per ton of sugarcane; 外送 EF is the amount of electricity delivered to or purchased from the grid per ton of sugarcane, with delivery being positive and purchase being negative; 电 represents the annual average power supply emission factor of the regional power grid; A is the ratio of the sucrose products produced by the enterprise to sugarcane; C m The calculation formula is: In the formula: o i is the carbon emission coefficient of the ith additive; AO i is the input amount of the ith additive per ton of sugarcane; A is the ratio of sucrose products to sugarcane produced by the enterprise; C f The calculation formula is: Where: AJ is the carbon content per ton of sugarcane water; N J is the amount of juice obtained from squeezing each ton of sugarcane; AL is the carbon content per unit filter mud obtained from each ton of sugarcane; N L It is the amount of filter mud obtained from each pressing of each ton of sugarcane.

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