A carbon footprint and environmental impact assessment method for the entire life cycle of fully biodegradable mulch

Abstract

The present invention discloses a carbon footprint and environmental impact assessment method for the whole life cycle of a fully biodegradable mulch film, including: determining the type of the fully biodegradable mulch film; quantifying and summarizing the input and output inventory data of each stage of the whole life cycle of the fully biodegradable mulch film, and constructing a carbon emission basic database for the whole life cycle of the fully biodegradable mulch film; dividing the whole life cycle of the fully biodegradable mulch film into five stages, and constructing a carbon footprint and environmental impact assessment model for the whole life cycle of the fully biodegradable mulch film; inputting the data in the carbon emission basic database into the carbon footprint and environmental impact assessment model for simulation calculation and quantitative assessment, and performing classification comparison and verification to obtain the final quantitative evaluation result. The method can effectively assess the impact of the fully biodegradable mulch film on the environment, provide guidance for optimizing the production and use of the mulch film, and has the characteristics of comprehensiveness, accuracy, objectivity, comparability, repeatability, and optimizability.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon emission, and in particular to a carbon footprint and environmental impact assessment method for the entire life cycle of a fully biodegradable mulch film. Background Art

[0002] Fully biodegradable mulch can be completely converted into inorganic small molecules such as CO2 and H2O within 6 months through biological treatment methods such as composting. It is not only green and environmentally friendly, but also saves the steps of residual film recovery and disposal. It is an important way to solve the problem of residual film pollution.

[0003] Fully biodegradable mulch not only has the advantages of being environmentally friendly, efficient, green and low-carbon, but can also achieve carbon reduction and emission reduction by changing crop cultivation patterns, providing a new way for the green and efficient production of crops. Existing fully biodegradable mulch raw materials mainly include biodegradable polymers such as polybutylene adipate / terephthalate (PBAT), polylactic acid (PLA) and polypropylene carbonate (PPC). Due to differences in crop types and cultivation conditions, the application effects of the same fully biodegradable mulch under different environmental conditions and on different crops vary significantly. It is necessary to develop fully biodegradable mulch with controllable product performance and degradation cycle for typical application scenarios for promotion and application.

[0004] Product evaluation is an important guarantee for promoting its application and promotion, and more attention is paid to the carbon footprint accounting and environmental impact assessment based on the life cycle of products. However, in the field of scientific research and market sales, fully biodegradable mulch films present the characteristics of a wide variety of products, different product functions, and diverse product formulas. There has not been a detailed study and analysis of factors such as the carbon footprint distribution and environmental impact indicators of fully biodegradable mulch films, and then there is no method to guide and optimize the mulch formula design, product creation and processing system construction. In addition, since the relevant research system for carbon footprint accounting and environmental impact assessment of different product performance and fully biodegradable mulch films during their life cycle has not yet been established, it is impossible to compare the differences between fully biodegradable mulch films and traditional mulch films in terms of environmental impact and carbon footprint indicators, and it is impossible to further clarify the advantages of fully biodegradable mulch films. Summary of the invention

[0005] In response to the above problems, the present invention proposes a carbon footprint and environmental impact assessment method for the entire life cycle of fully biodegradable mulch, which can effectively evaluate the impact of fully biodegradable mulch on the environment and provide guidance for optimizing the production and use of mulch.

[0006] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0007] A method for evaluating the carbon footprint and environmental impact of a fully biodegradable mulch film throughout its life cycle, the method comprising:

[0008] Determine the type of fully biodegradable mulch and clarify the specific evaluation object;

[0009] Quantify and summarize the input and output inventory data of each stage of the full life cycle of the fully biodegradable mulch, and build a basic database of carbon emissions for the full life cycle of the fully biodegradable mulch;

[0010] Based on the life cycle assessment theory, the life cycle of fully biodegradable mulch is divided into five stages, namely: mulch raw material acquisition and preparation stage, mulch raw material modification and secondary processing stage, mulch production and preparation stage, mulch transportation and circulation stage, and mulch final disposal stage. A carbon footprint and environmental impact assessment model for the life cycle of fully biodegradable mulch is constructed.

[0011] Inputting the data in the carbon emission basic database into the carbon footprint and environmental impact assessment model for simulation calculation and quantitative assessment;

[0012] The results of simulation calculation and quantitative evaluation are classified, compared and verified to obtain the final quantitative evaluation results.

[0013] As a preferred embodiment of the present invention, the type of the fully biodegradable mulch film is determined according to the physical parameters, component composition, suitable crop types and usage per mu of the fully biodegradable mulch film;

[0014] The carbon emission basic database includes: key operating and process parameters, energy consumption, material consumption, carbon emission coefficient and environmental impact coefficient at each stage of the life cycle of fully biodegradable mulch, as well as missing data within the entire life cycle that are completed through actual measurement of carbon emission data.

[0015] As a preferred embodiment of the present invention, the formula of the carbon footprint and environmental impact assessment model is:

[0016] C=C1+C2+C3+C4+C5;

[0017] E i =E i，1 +E i，2 +E i，3 +E i，4 +E i，5 ;

[0018] Where, C represents the total carbon footprint of the entire life cycle of the fully biodegradable mulch film, C1 is the total carbon footprint of the mulch film raw material acquisition and preparation stage, C2 is the total carbon footprint of the mulch film raw material modification and secondary processing stage, C3 is the total carbon footprint of the mulch film production and preparation stage, C4 is the total carbon footprint of the mulch film transportation and circulation stage, and C5 is the total carbon footprint of the mulch film final disposal stage; E iThe single quantitative indicator of environmental impact of the whole life cycle of fully biodegradable mulch film, E i，1 E is a quantitative indicator of the environmental impact of the acquisition and preparation of mulch materials. i，2 It is a quantitative indicator of the environmental impact of the modification and secondary processing of mulch raw materials. i，3 It is a quantitative indicator of the environmental impact of the film production and preparation stage. i，4 is a quantitative indicator of the environmental impact of the transportation and circulation of ground film. i，5 is a single quantitative indicator of environmental impact at the final disposal stage of ground film; i is the type of single quantitative indicator of environmental impact, including ozone depletion potential, smog potential, acidification potential, eutrophication potential, carcinogenic potential, respiratory toxicity potential, ecotoxicity potential and fossil fuel consumption potential.

[0019] As a preferred solution of the present invention, the total carbon footprint C1 and the single environmental impact quantitative index E of the film raw material acquisition and preparation stage are i，1 They all include petroleum-based degradable polyester, CO2-based degradable polyester, bio-based degradable polyester, biomass raw materials and additives. The calculation formula is:

[0020] C1=∑C 1，a ;

[0021] E i，1 =∑E i，1， a+E i，1，O ;

[0022] Where a represents the type of specific raw material being evaluated; E i，1，O The total amount of quantitative indicators of environmental impacts from fixed sources and non-fixed sources during the acquisition and preparation of mulch raw materials; C 1，a and E i，1，a They are the total carbon footprint and environmental impact quantitative indicators corresponding to specific raw materials, and the calculation formula is:

[0023] C 1，a =Q 1，a ×f 1，a ; E i，1，a =Q 1，a ×f i，1，a ;

[0024] In the formula, Q 1，a is the usage of specific raw materials; f 1，a and f i，1，a They are the carbon footprint coefficient and environmental impact coefficient of the specific raw materials, and the calculation formula is:

[0025]

[0026] f i，1，a =f i，1，a，F+f i，1，a，C +f i，1，a，B +f i，1，a，Bio +f i，1，a，R ;

[0027] Among them, f 1，a，F 、f i，1，a，F are the carbon emission coefficient and environmental impact coefficient of petroleum-based degradable polyester, f 1，a，C 、f i，1，a，C are the carbon emission coefficient and environmental impact coefficient of CO2-based degradable polyester, f 1，a，B 、f i，1，a，B are the carbon emission coefficient and environmental impact coefficient of biodegradable polyester, respectively. 1，a，Bio 、f i，1，a，Bio are the carbon emission coefficient and environmental impact coefficient of biomass raw materials, respectively, 1，a，R 、f i，1，a，R are the carbon emission coefficient and environmental impact coefficient of the additive, respectively, i，1，a，S is the carbon dioxide fixation coefficient of the material when biomass is used as raw material, It is the carbon dioxide fixation coefficient of the substance when carbon dioxide is used as raw material.

[0028] As a preferred embodiment of the present invention, the carbon emission coefficient f of petroleum-based degradable polyester 1，a，F and environmental impact factor f i，1，a，F The calculation formula is:

[0029]

[0030] Carbon emission coefficient f of CO2-based degradation of polyester 1，a，C and environmental impact factor f i，1，a，C The calculation formula is:

[0031]

[0032] Carbon emission factor f of biodegradable polyester 1，a，B and environmental impact factor f i，1，a，B The calculation formula is:

[0033]

[0034] Carbon emission factor f of biomass raw materials 1，a，Bio and environmental impact factor f i，1，a，Bio The calculation formula is:

[0035]

[0036] Carbon emission factor f of additives 1，a，R and environmental impact factor f i，1，a，R The calculation formula is:

[0037]

[0038] Wherein, m represents the types of petroleum-based degradable polyester, CO2-based degradable polyester, bio-based degradable polyester, biomass raw materials and additives; n represents the number of petroleum-based degradable polyester, CO2-based degradable polyester, bio-based degradable polyester, biomass raw materials and additives at each stage of the whole life cycle; f 1，a，F，m 、f i，1，a，F，m are the carbon emission coefficient and environmental impact coefficient of different types of petroleum-based degradable polyesters; f 1，a，C，m 、f i，1，a，C，m are the carbon emission coefficients and environmental impact coefficients of different types of CO2-based degradable polyesters; f 1，a，B，m 、f i，1，a，B，m are the carbon emission coefficient and environmental impact coefficient of different types of biodegradable polyesters; f 1，a，Bio，m 、f i，1，a，Bio，m are the carbon emission coefficient and environmental impact coefficient of different types of biomass raw materials; f 1，a，R，m 、f i，1，a，R，m They are the carbon emission coefficient and environmental impact coefficient of different types of additives respectively.

[0039] As a preferred embodiment of the present invention, when biomass is used as raw material, the carbon dioxide fixation coefficient f i，1，a，S The calculation formula is:

[0040]

[0041] B m =B×(1-WR)×α;

[0042] Carbon dioxide fixation coefficient of substances when using carbon dioxide as raw material The calculation formula is:

[0043]

[0044] Where T1 and T2 are the time when the biomass raw material starts growing and ends growing, respectively. m is the fixed carbon content of the biomass raw material, dT is the differential of time; B is the mass of the biomass raw material, W is the moisture content of the biomass raw material, R is the impurity content of the biomass raw material, and α is the utilization coefficient of the biomass raw material; is the total amount of carbon dioxide consumed in the production process, and β is the comprehensive utilization coefficient of carbon dioxide.

[0045] As a preferred solution of the present invention, the total carbon footprint C2 and the single environmental impact quantitative index E i，2 The calculation formula is:

[0046] C2=C 2，1 +C 2，2 ;

[0047] E i，2 =E i，2，1 +E i，2，2 +E i，2，O ;

[0048] In the formula, E i，2，O It is the total amount of quantitative indicators of environmental impacts generated by fixed sources and non-fixed sources during the modification and secondary processing of mulch raw materials;

[0049] C 2，1 and E i，2，1 They are the total carbon footprint and the total amount of environmental impact quantitative indicators generated by energy consumption in the modification and secondary processing of mulch raw materials, respectively. The calculation formula is:

[0050]

[0051]

[0052] In the formula, j is the type of energy consumed, p is the amount of energy consumed; M e，j is the energy consumption; f e，j and f i，e，j They are the carbon emission coefficient and environmental impact coefficient of energy consumption;

[0053] C 2，2 and E i，2，2 They are the total carbon footprint and environmental impact quantitative indicators generated by the consumption of materials in the modification and secondary processing stages of mulch raw materials, respectively. The calculation formula is:

[0054]

[0055]

[0056] In the formula, w is the type of consumables, x is the quantity of consumables; M m，w is the material consumption; f m，w and f i，m，w They are the carbon emission coefficient and environmental impact coefficient of material consumption respectively.

[0057] As a preferred solution of the present invention, the total carbon footprint C3 and the single environmental impact quantitative index E of the film production and preparation stage are i，3 The calculation formula is:

[0058] C3=C 3，1 +C 3，2 ;

[0059] Ei，3 =E i，3，1 +E i，3，2 +E i，3，O ;

[0060] In the formula, C 3，1 and E i，3，1 The total carbon footprint and environmental impact quantitative indicators generated by energy consumption in the production and preparation stages of mulch films are respectively the total carbon footprint generated by energy consumption in the mulch film raw material modification and secondary processing stages C 2，1 and the total amount of environmental impact quantitative indicators E i，2，1 The calculation formula is used for calculation; C 3，2 and E i，3，2 The total carbon footprint and environmental impact quantitative indicators of material consumption in the production and preparation stages of mulch film are respectively based on the total carbon footprint C generated by material consumption in the modification and secondary processing stages of mulch film raw materials. 2，2 and environmental impact quantitative index E i，2，2 The calculation formula is used for calculation; E i，3，O It is the total amount of quantitative indicators of environmental impacts caused by fixed sources and non-fixed sources in the production and preparation stages of mulch film.

[0061] As a preferred solution of the present invention, the total carbon footprint C4 and the single environmental impact quantitative index E of the mulch film transportation and circulation stage are i，4 The calculation formula is:

[0062]

[0063]

[0064] Where g is the type of transportation vehicle during the film transport and circulation stage; h is the number of transportation vehicles during the film transport and circulation stage; D g is the transportation distance of different means of transportation; f g and f i，g They are the carbon emission coefficient and environmental impact coefficient of transportation respectively.

[0065] As a preferred solution of the present invention, the total carbon footprint C5 and the single environmental impact quantitative index E of the final disposal stage of the ground film are i，5 The calculation formula is:

[0066]

[0067]

[0068] W t =L×ω×R t ×μ;

[0069] Where, t is the disposal method of fully biodegradable mulch in the final disposal stage of mulch, including resource utilization, incineration, landfill and composting; y is the number of disposal methods of fully biodegradable mulch in the final disposal stage of mulch; f t and f i，t are the carbon emission coefficient and environmental impact coefficient of the fixed disposal method; W t is the amount of fully biodegradable mulch treated in a fixed disposal method; L is the amount of fully biodegradable mulch used within the evaluation boundary; ω is the disposal coefficient of fully biodegradable mulch. If the disposal method is resource utilization, ω is the resource utilization coefficient; if the disposal method is incineration, landfill and composting, ω is the recovery coefficient; R t is the proportion of fully biodegradable mulch disposed of in a fixed disposal method, and μ is the comprehensive disposal coefficient of fully biodegradable mulch under fixed disposal conditions.

[0070] Compared with the prior art, the beneficial effects of the present invention are as follows: the method of the present invention covers the entire life cycle of fully biodegradable mulch, and can more comprehensively evaluate the impact of fully biodegradable mulch on the environment. The carbon emission basic database covers the input and output inventory data of the processes of raw material acquisition and preparation, production and manufacturing, large-scale application and final disposal, providing real, effective and reliable data support for the relevant evaluation work; by quantifying and summarizing the input and output inventory data of each stage of the entire life cycle and using the full life cycle evaluation software to build an evaluation model, the carbon emissions and environmental impact of fully biodegradable mulch can be simulated and calculated more accurately and objectively; by classifying and comparing and finally verifying the results of simulation calculation and quantitative evaluation, the environmental impact of different types of fully biodegradable mulch can be more intuitively compared, providing a basis for selecting more environmentally friendly mulch; by continuously optimizing the input and output inventory data and evaluation model, the accuracy and reliability of the evaluation can be improved, providing guidance for further optimizing the production and use of mulch; the standard process and data input can be reused, which is suitable for the environmental impact assessment of different types of fully biodegradable mulch, and has the characteristics of comprehensiveness, accuracy, objectivity, comparability, repeatability, and optimizability. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0072] in:

[0073] Figure 1 The present invention is a flow chart of the method. DETAILED DESCRIPTION

[0074] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0075] like Figure 1 As shown, it is an embodiment of the present invention, which provides a method for evaluating the carbon footprint and environmental impact of the entire life cycle of a fully biodegradable mulch film, specifically comprising the following steps:

[0076] S1: Determine the type of fully biodegradable mulch and clarify the specific evaluation object;

[0077] Specifically, the type of fully biodegradable mulch is determined based on the physical parameters, component composition, suitable crop types, and usage per acre of the fully biodegradable mulch;

[0078] S2: Quantify and summarize the input and output inventory data of each stage of the full life cycle of fully biodegradable mulch, and build a basic database of carbon emissions for the full life cycle of fully biodegradable mulch;

[0079] By interpreting and obtaining the key operating and process parameters of each stage of the life cycle of fully biodegradable mulch, the input and output inventory data of each stage of the life cycle are quantified and summarized; by investigating existing literature, analyzing existing research cases, referring to similar research results and other methods, relying on the data and methods released by international and domestic authoritative institutions, the basic data of carbon emission factors of the input and output inventory data of each stage of the life cycle of fully biodegradable mulch are clarified and summarized, and the missing data within the entire life cycle are improved through the actual measurement of carbon emission values ​​and other means, so as to construct a basic carbon emission database that can fully meet the carbon footprint accounting of the entire life cycle of fully biodegradable mulch;

[0080] The basic carbon emission database covers the input and output inventory data of raw material acquisition and preparation (including petroleum-based degradable polyester, CO2-based degradable polyester, bio-based degradable polyester, biomass raw materials and various additives, etc.), production and manufacturing, large-scale application and final disposal, providing real, effective and reliable data support for the relevant evaluation work.

[0081] In one of the embodiments, the basic carbon emission database includes: key operating and process parameters, energy consumption, material consumption, carbon emission coefficient and environmental impact coefficient at each stage of the life cycle of the fully biodegradable mulch, as well as missing data within the entire life cycle that is completed through actual measurements of carbon emission data.

[0082] Specifically, a basic database of carbon emissions for the entire life cycle of fully biodegradable mulch was constructed: the input and output inventory data of each stage of the life cycle of reconstructed bamboo materials and their products were interpreted and obtained, and the relevant inventory data achieved 100% coverage of the entire life cycle of reconstructed bamboo materials and their products; 122 basic data on carbon emission factors were summarized and included (56 raw materials, 12 products, 20 energy sources, and 34 typical processes), and 15 basic data on carbon emission factors of typical raw materials and products were measured and added (bamboo bundles, adhesives, reconstructed bamboo materials, etc.).

[0083] S3: Based on the life cycle assessment theory, the life cycle of fully biodegradable mulch is divided into five stages, namely: mulch raw material acquisition and preparation stage, mulch raw material modification and secondary processing stage, mulch production and preparation stage, mulch transportation and circulation stage, and mulch final disposal stage, to build a carbon footprint and environmental impact assessment model for the full life cycle of fully biodegradable mulch;

[0084] Based on the application of the full life cycle assessment software, combined with the common characteristics of the technical system of fully biodegradable mulch with different product performance and degradation cycle, the life cycle of fully biodegradable mulch is divided into five stages. The total carbon footprint of the five stages is C1, C2, C3, C4 and C5 respectively. The formula of the carbon footprint and environmental impact assessment model is:

[0085] C=C1+C2+C3+C4+C5;

[0086] E i =E i，1 +E i，2 +E i，3 +E i，4 +E i，5 ;

[0087] Where, C represents the total carbon footprint of the entire life cycle of the fully biodegradable mulch film, C1 is the total carbon footprint of the mulch film raw material acquisition and preparation stage, C2 is the total carbon footprint of the mulch film raw material modification and secondary processing stage, C3 is the total carbon footprint of the mulch film production and preparation stage, C4 is the total carbon footprint of the mulch film transportation and circulation stage, and C5 is the total carbon footprint of the mulch film final disposal stage; E i The single quantitative indicator of environmental impact of the whole life cycle of fully biodegradable mulch film, E i，1 E is a quantitative indicator of the environmental impact of the acquisition and preparation of mulch materials. i，2 It is a quantitative indicator of the environmental impact of the modification and secondary processing of mulch raw materials. i，3 It is a quantitative indicator of the environmental impact of the film production and preparation stage. i，4 is a quantitative indicator of the environmental impact of the transportation and circulation of ground film. i，5is a single quantitative indicator of environmental impact at the final disposal stage of ground film; i is the type of single quantitative indicator of environmental impact, including ozone layer depletion potential, smog potential, acidification potential, eutrophication potential, carcinogenic potential, respiratory toxicity potential, ecotoxicity potential, fossil fuel consumption potential, etc.

[0088] In a specific embodiment, the total carbon footprint C1 of the film raw material acquisition and preparation stage and the single environmental impact quantitative index E i，1 They all include petroleum-based degradable polyester, CO2-based degradable polyester, bio-based degradable polyester, biomass raw materials and various additives, etc. The calculation formula is:

[0089] C1=∑C 1，a ;

[0090] E i，1 =∑E i，1，a +E i，1，O ;

[0091] Where a represents the type of specific raw material being evaluated; E i，1，O The total amount of quantitative indicators of environmental impacts from fixed sources and non-fixed sources during the acquisition and preparation of mulch raw materials; C 1，a and E i，1，a They are the total carbon footprint and environmental impact quantitative indicators corresponding to specific raw materials, and the calculation formula is:

[0092] C 1，a =Q 1，a ×f 1，a ; E i，1，a =Q 1，a ×f i，l，a ;

[0093] In the formula, Q 1，a is the usage of specific raw materials; f 1，a and f i，1，a They are the carbon footprint coefficient and environmental impact coefficient of the specific raw materials, and the calculation formula is:

[0094]

[0095] f i，1，a =f i，1，a，F +f i，1，a，C +f i，1，a，B +f i，1，a，Bio +f i，1，a，R ;

[0096] Among them, f 1，a，F 、f i，1，a，F are the carbon emission coefficient and environmental impact coefficient of petroleum-based degradable polyester, f 1，a，C 、f i，1，a，Care the carbon emission coefficient and environmental impact coefficient of CO2-based degradable polyester, f 1，a，B 、f i，1，a，B are the carbon emission coefficient and environmental impact coefficient of biodegradable polyester, respectively. 1，a，Bio 、f i，1，a，Bio are the carbon emission coefficient and environmental impact coefficient of biomass raw materials, respectively, 1，a，R 、f i，1，a，R are the carbon emission coefficient and environmental impact coefficient of the additive, respectively, i，1，a，S is the carbon dioxide fixation coefficient of the material when biomass is used as raw material, It is the carbon dioxide fixation coefficient of the substance when carbon dioxide is used as raw material.

[0097] Carbon emission factor f of petroleum-based degradable polyester 1，a，F and environmental impact factor f i，1，a，F The calculation formula is:

[0098]

[0099] Carbon emission coefficient f of CO2-based degradation of polyester 1，a，C and environmental impact factor f i，1，a，C The calculation formula is:

[0100]

[0101] Carbon emission factor f of biodegradable polyester 1，a，B and environmental impact factor f i，1，a，B The calculation formula is:

[0102]

[0103] Carbon emission factor f of biomass raw materials 1，a，Bio and environmental impact factor f 1，a，Bio The calculation formula is:

[0104]

[0105] Carbon emission factor f of additives 1，a，R and environmental impact factor f i，1，a，R The calculation formula is:

[0106]

[0107] Wherein, m represents the types of petroleum-based degradable polyester (including PBAT, PCL, PBS, etc.), CO2-based degradable polyester (including PPC, etc.), bio-based degradable polyester (including PHA, PLA), biomass raw materials (including starch, straw, etc.) and various additives; n represents the number of petroleum-based degradable polyester, CO2-based degradable polyester, bio-based degradable polyester, biomass raw materials and various additives at each stage of the whole life cycle; f 1，a，F，m 、f i，1，a，F，m are the carbon emission coefficient and environmental impact coefficient of different types of petroleum-based degradable polyesters; f 1，a，C，m 、f i，1，a，C，m are the carbon emission coefficients and environmental impact coefficients of different types of CO2-based degradable polyesters; f 1，a，B，m 、f i，1，a，B，m are the carbon emission coefficient and environmental impact coefficient of different types of biodegradable polyesters; f 1，a，Bio，m 、f i，1，a，Bio，m are the carbon emission coefficient and environmental impact coefficient of different types of biomass raw materials; f 1，a，R，m 、f i，1，a，R，m They are the carbon emission coefficient and environmental impact coefficient of different types of additives respectively.

[0108] Carbon dioxide fixation factor f of the material when using biomass as raw material i，1，a，S The calculation formula is:

[0109]

[0110] B m =B×(1-WR)×α;

[0111] Carbon dioxide fixation coefficient of substances when using carbon dioxide as raw material The calculation formula is:

[0112]

[0113] Where T1 and T2 are the time when the biomass raw material starts growing and ends growing, respectively. m is the fixed carbon content of the biomass raw material, dT is the differential of time; B is the amount of biomass raw material, W is the moisture content of the biomass raw material, R is the impurity content of the biomass raw material, and α is the utilization coefficient of the biomass raw material; is the total amount of carbon dioxide consumed in the production process, and β is the comprehensive utilization coefficient of carbon dioxide.

[0114] Total carbon footprint C2 and single environmental impact quantitative index E of mulch raw material modification and secondary processing i，2 The calculation formula is:

[0115] C2=C 2，1+C 2，2 ;

[0116] E i，2 =E i，2，1 +E i，2，2 +E i，2，O ;

[0117] In the formula, E i，2，O It is the total amount of quantitative indicators of environmental impacts generated by fixed sources and non-fixed sources during the modification and secondary processing of mulch raw materials;

[0118] C 2，1 and E i，2，1 They are the total carbon footprint and the total amount of environmental impact quantitative indicators generated by energy consumption in the modification and secondary processing of mulch raw materials, respectively. The calculation formula is:

[0119]

[0120]

[0121] Where, j is the type of energy consumed (including but not limited to gasoline, kerosene, diesel and electricity, etc.), p is the amount of energy consumed; M e，j is the energy consumption; f e，j and f i，e，j They are the carbon emission coefficient and environmental impact coefficient of energy consumption;

[0122] C 2，2 and E i，2，2 They are the total carbon footprint and environmental impact quantitative indicators generated by the consumption of materials in the modification and secondary processing stages of mulch raw materials, respectively. The calculation formula is:

[0123]

[0124]

[0125] Wherein, w is the type of consumables (including but not limited to various plasticizers, additives, modifying agents and masterbatches), x is the quantity of consumables; M m，w is the material consumption; f m，w and f i，m，w They are the carbon emission coefficient and environmental impact coefficient of material consumption respectively.

[0126] Total carbon footprint C3 and single environmental impact quantitative index E in the production and preparation stage of mulch film i，3 The calculation formula is:

[0127] C3=C 3，1 +C 3，2 ;

[0128] E i，3 =Ei，3，1 +E i，3，2 +E i，3，O ;

[0129] In the formula, C 3，1 and E i，3，1 The total carbon footprint and environmental impact quantitative indicators generated by energy consumption in the production and preparation stages of mulch films are respectively the total carbon footprint generated by energy consumption in the mulch film raw material modification and secondary processing stages C 2，1 and the total amount of environmental impact quantitative indicators E i，2，1 The calculation formula is used for calculation; namely:

[0130]

[0131] C 3，2 and E i，3，2 The total carbon footprint and environmental impact quantitative indicators of material consumption in the production and preparation stages of mulch film are respectively based on the total carbon footprint C generated by material consumption in the modification and secondary processing stages of mulch film raw materials. 2，2 and environmental impact quantitative index E i，2，2 The calculation formula is:

[0132]

[0133] E i，3，O It is the total amount of quantitative indicators of environmental impacts caused by fixed sources and non-fixed sources in the production and preparation stages of mulch film.

[0134] The total carbon footprint C4 and the single environmental impact quantitative index E during the transportation and circulation of ground film i，4 The calculation formula is:

[0135]

[0136]

[0137] Where, g is the type of transportation tools used in the transportation and circulation of ground film (including but not limited to sea transportation, air transportation, road transportation and rail transportation, etc.); h is the number of transportation tools used in the transportation and circulation of ground film; D g is the transportation distance of different means of transportation; f g and f i，g They are the carbon emission coefficient and environmental impact coefficient of transportation respectively.

[0138] The total carbon footprint C5 and the single environmental impact quantitative index E of the final disposal stage of ground film i，5 The calculation formula is:

[0139]

[0140]

[0141] W t =L×ω×R t ×μ;

[0142] Where, t is the disposal method of fully biodegradable mulch in the final disposal stage of mulch (including but not limited to resource utilization, incineration, landfill and composting, etc.); y is the number of disposal methods of fully biodegradable mulch in the final disposal stage of mulch; f t 、f i，t are the carbon emission coefficient and environmental impact coefficient of the fixed disposal method; W t is the amount of fully biodegradable mulch treated in a fixed disposal method; L is the amount of fully biodegradable mulch used within the evaluation boundary; ω is the disposal coefficient of fully biodegradable mulch. If the disposal method is resource utilization, ω is the resource utilization coefficient; if the disposal method is incineration, landfill and composting, ω is the recovery coefficient; R t is the proportion of fully biodegradable mulch disposed of in a fixed disposal method, and μ is the comprehensive disposal coefficient of fully biodegradable mulch under fixed disposal conditions.

[0143] S4: Input the data in the carbon emission basic database into the carbon footprint and environmental impact assessment model to simulate, calculate and quantitatively assess the carbon footprint and environmental impact index parameters of the full life cycle of the fully biodegradable mulch film;

[0144] S5: Classify, compare and verify the results of simulation calculation and quantitative evaluation to obtain the final quantitative evaluation results.

[0145] In summary, the method of the present invention covers the entire life cycle of fully biodegradable mulch, and can more comprehensively evaluate the impact of fully biodegradable mulch on the environment. The carbon emission basic database covers the input and output inventory data of the processes of raw material acquisition and preparation, production and manufacturing, large-scale application and final disposal, providing real, effective and reliable data support for the relevant evaluation work; by quantifying and summarizing the input and output inventory data of each stage of the life cycle and using the full life cycle evaluation software to build an evaluation model, the carbon emissions and environmental impacts of fully biodegradable mulch are more accurately and objectively simulated and calculated; by classifying and comparing and finally verifying the results of simulation calculation and quantitative evaluation, the environmental impacts of different types of fully biodegradable mulch are more intuitively compared, providing a basis for selecting more environmentally friendly mulch; by continuously optimizing the input and output inventory data and evaluation model, the accuracy and reliability of the evaluation are improved, providing guidance for further optimizing the production and use of mulch; the standard process and data input can be reused, which is suitable for the environmental impact assessment of different types of fully biodegradable mulch, and has the characteristics of comprehensiveness, accuracy, objectivity, comparability, repeatability, and optimizability.

[0146] It should be understood that the various parts of the present application can be implemented with hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented with software or firmware stored in a memory and executed by a suitable instruction execution system. All or part of the steps of the above embodiment method can be completed by instructing the relevant hardware through a program, which can be stored in a computer-readable storage medium, and when the program is executed, it includes one of the steps of the method embodiment or a combination thereof.

[0147] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for carbon footprint and environmental impact assessment of the entire life cycle of fully biodegradable mulch film, characterized in that: The method comprises: Determine the type of fully biodegradable mulch film and clarify the specific evaluation object; the type of the fully biodegradable mulch film is determined based on the physical parameters, component composition, suitable crop types and per-acre usage of the fully biodegradable mulch film; Quantify and summarize the input and output inventory data of the fully biodegradable mulch at each stage of its life cycle, and build a basic carbon emission database for the full life cycle of the fully biodegradable mulch; the basic carbon emission database includes: key operation and process parameters, energy consumption, material consumption, carbon emission coefficient and environmental impact coefficient at each stage of the full life cycle of the fully biodegradable mulch, as well as complete missing data within the full life cycle through actual measurement of carbon emission data; Based on the life cycle assessment theory, the life cycle of fully biodegradable mulch is divided into five stages, namely: mulch raw material acquisition and preparation stage, mulch raw material modification and secondary processing stage, mulch production and preparation stage, mulch transportation and circulation stage, and mulch final disposal stage. A carbon footprint and environmental impact assessment model for the life cycle of fully biodegradable mulch is constructed. The formula for the carbon footprint and environmental impact assessment model is: C=C1+C2+C3+C4+C5; AND i =And i，1 +E i，2 +E i，3 +E i，4 +E i，5 ; Where, C represents the total carbon footprint of the entire life cycle of the fully biodegradable mulch film, C1 is the total carbon footprint of the mulch film raw material acquisition and preparation stage, C2 is the total carbon footprint of the mulch film raw material modification and secondary processing stage, C3 is the total carbon footprint of the mulch film production and preparation stage, C4 is the total carbon footprint of the mulch film transportation and circulation stage, and C5 is the total carbon footprint of the mulch film final disposal stage; E i The single quantitative indicator of environmental impact of the whole life cycle of fully biodegradable mulch film, E i，1 E is a quantitative indicator of the environmental impact of the acquisition and preparation of mulch materials. i，2 It is a quantitative indicator of the environmental impact of the modification and secondary processing of mulch raw materials. i，3 It is a quantitative indicator of the environmental impact of the film production and preparation stage. i，4 is a quantitative indicator of the environmental impact of the transportation and circulation of ground film. i，5 is a single quantitative indicator of environmental impact at the final disposal stage of ground film; i is the type of single quantitative indicator of environmental impact, including ozone layer depletion potential, smog potential, acidification potential, eutrophication potential, carcinogenic potential, respiratory toxicity potential, ecotoxicity potential and fossil fuel consumption potential; The total carbon footprint C1 and the single environmental impact quantitative index E of the film raw material acquisition and preparation stage i，1 They all include petroleum-based degradable polyester, CO2-based degradable polyester, bio-based degradable polyester, biomass raw materials and additives. The calculation formula is: C1=∑C 1，a ; AND i，1 =∑E i，1，a +E i，1，o ; Where a represents the type of specific raw material being evaluated; E i，1，o The total amount of quantitative indicators of environmental impacts from fixed sources and non-fixed sources during the acquisition and preparation of mulch raw materials; C 1，a and E i，1，a They are the total carbon footprint and environmental impact quantitative indicators corresponding to specific raw materials, and the calculation formula is: C 1，a =Q 1，a ×f 1，a ;E i，1，a =Q 1，a ×f i，1，a ; In the formula, Q 1，a is the usage of specific raw materials; f 1，a and f i，1，a They are the carbon footprint coefficient and environmental impact coefficient of the specific raw materials, and the calculation formula is: f i，1，a =f i，1，a，F +f i，1，a，C +f i，1，a，B +f i，1，a，Bio +f i，1，a，R ; Among them, f 1，a，F 、f i，1，a，F are the carbon emission coefficient and environmental impact coefficient of petroleum-based degradable polyester, f 1，a，C 、f i，1，a，C are the carbon emission coefficient and environmental impact coefficient of CO2-based degradable polyester, f 1，a，B 、f i，1，a，B are the carbon emission coefficient and environmental impact coefficient of biodegradable polyester, respectively. 1，a，Bio 、f i，1，a，Bio are the carbon emission coefficient and environmental impact coefficient of biomass raw materials, respectively, 1，a，R 、f i，1，a，R are the carbon emission coefficient and environmental impact coefficient of the additive, respectively, i，1，a，s is the carbon dioxide fixation coefficient of the material when biomass is used as raw material, is the carbon dioxide fixation coefficient of the substance when carbon dioxide is used as raw material; Carbon emission factor f of petroleum-based degradable polyester 1，a，F and environmental impact factor f i，1，a，F The calculation formula is: Carbon emission coefficient f of CO2-based degradation of polyester 1，a，C and environmental impact factor f i，1，a，C The calculation formula is: Carbon emission factor f of biodegradable polyester 1，a，B and environmental impact factor f i，1，a，B The calculation formula is: Carbon emission factor f of biomass raw materials 1，a，Bio and environmental impact factor f i，1，a，Bio The calculation formula is: Carbon emission factor f of additives 1，a，R and environmental impact factor f i，1，a，R The calculation formula is: Wherein, m represents the types of petroleum-based degradable polyester, CO2-based degradable polyester, bio-based degradable polyester, biomass raw materials and additives; n represents the number of petroleum-based degradable polyester, CO2-based degradable polyester, bio-based degradable polyester, biomass raw materials and additives at each stage of the whole life cycle; f 1，a，F，m 、f i，1，a，F，mm are the carbon emission coefficient and environmental impact coefficient of different types of petroleum-based degradable polyesters; f 1，a，C，m 、f i，1，a，C，m are the carbon emission coefficients and environmental impact coefficients of different types of CO2-based degradable polyesters; f 1，a，B，m 、f i，1，a，B，m are the carbon emission coefficient and environmental impact coefficient of different types of biodegradable polyesters; f 1，a，Bio，m 、f i，1，a，Bio，m are the carbon emission coefficient and environmental impact coefficient of different types of biomass raw materials; f 1，a，R，m 、f i，1，a，R，m They are the carbon emission coefficient and environmental impact coefficient of different types of additives; Carbon dioxide fixation factor f of the material when using biomass as raw material i，1，a，S The calculation formula is: B m =B×(1-W-R)×α; Carbon dioxide fixation coefficient of substances when using carbon dioxide as raw material The calculation formula is: Where T1 and T2 are the time when the biomass raw material starts growing and ends growing, respectively. m is the fixed carbon content of the biomass raw material, dT is the differential of time; B is the mass of the biomass raw material, W is the moisture content of the biomass raw material, R is the impurity content of the biomass raw material, and α is the utilization coefficient of the biomass raw material; is the total amount of carbon dioxide consumed in the production process, and β is the comprehensive utilization coefficient of carbon dioxide; The total carbon footprint C2 and the single environmental impact quantitative index E of the film raw material modification and secondary processing stage i，2 The calculation formula is: C2=C 2，1 +C 2，2 ; AND i，2 =And i，2，1 +E i，2，2 +E i，2，o ; In the formula, E i，2，o It is the total amount of quantitative indicators of environmental impacts generated by fixed sources and non-fixed sources during the modification and secondary processing of mulch raw materials; C 2，1 and E i，2，1 They are the total carbon footprint and the total amount of environmental impact quantitative indicators generated by energy consumption in the modification and secondary processing of mulch raw materials, respectively. The calculation formula is: In the formula, j is the type of energy consumed, p is the amount of energy consumed; M e，j is the energy consumption; f e，j and f i，e，j They are the carbon emission coefficient and environmental impact coefficient of energy consumption; C 2，2 and E i，2，2 They are the total carbon footprint and environmental impact quantitative indicators generated by the consumption of materials in the modification and secondary processing stages of mulch raw materials, respectively. The calculation formula is: In the formula, w is the type of consumables, x is the quantity of consumables; M m，w is the material consumption; f m，w and f i，m，w They are the carbon emission coefficient and environmental impact coefficient of material consumption; The total carbon footprint C3 and the single environmental impact quantitative index E of the film production and preparation stage i，3 The calculation formula is: C3=C 3，1 +C 3，2 ; AND i，3 =And i，3，1 +E i，3，2 +E i，3，o ; In the formula, C 3，1 and E i，3，1 The total carbon footprint and environmental impact quantitative indicators generated by energy consumption in the production and preparation stages of mulch films are respectively the total carbon footprint generated by energy consumption in the mulch film raw material modification and secondary processing stages C 2，1 and the total amount of environmental impact quantitative indicators E i，2，1 The calculation formula is used for calculation; C 3，2 and E i，3，2 The total carbon footprint and environmental impact quantitative indicators of material consumption in the production and preparation stages of mulch film are respectively based on the total carbon footprint C generated by material consumption in the modification and secondary processing stages of mulch film raw materials. 2，2 and environmental impact quantitative index E i，2，2 The calculation formula is used for calculation; E i，3，o It is the total amount of quantitative indicators of environmental impacts caused by fixed sources and non-fixed sources in the production and preparation of ground film; The total carbon footprint C5 and the single environmental impact quantitative index E of the final disposal stage of the mulch film i，5 The calculation formula is: IN t =L×ω×R t ×μ; Where, t is the disposal method of fully biodegradable mulch in the final disposal stage of mulch, including resource utilization, incineration, landfill and composting; y is the number of disposal methods of fully biodegradable mulch in the final disposal stage of mulch; f t and f i，t are the carbon emission coefficient and environmental impact coefficient of the fixed disposal method; W t is the amount of fully biodegradable mulch treated in a fixed disposal method; L is the amount of fully biodegradable mulch used within the evaluation boundary; ω is the disposal coefficient of fully biodegradable mulch. If the disposal method is resource utilization, ω is the resource utilization coefficient; if the disposal method is incineration, landfill and composting, ω is the recovery coefficient; R t is the proportion of fully biodegradable mulch films disposed of in a fixed disposal method, μ is the comprehensive disposal coefficient of fully biodegradable mulch films under the condition of fixed disposal method; Inputting the data in the carbon emission basic database into the carbon footprint and environmental impact assessment model for simulation calculation and quantitative assessment; The results of simulation calculation and quantitative evaluation are classified, compared and verified to obtain the final quantitative evaluation results.

2. The method for carbon footprint and environmental impact assessment of the entire life cycle of a fully biodegradable mulch film according to claim 1, characterized in that: The total carbon footprint C4 and the single environmental impact quantitative index E of the mulch film transportation and circulation stage i，4 The calculation formula is: In the formula, g is the type of transportation tools used in the transportation and circulation of ground film; h is the number of transportation tools used in the transportation and circulation of ground film; D g is the transportation distance of different means of transportation; f g and f i，g They are the carbon emission coefficient and environmental impact coefficient of transportation respectively.

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