Evaluation method for bamboo product full life cycle carbon footprint and environmental influence

Abstract

The invention discloses a bamboo product full life cycle carbon footprint and environment influence-oriented evaluation method. According to the method, raw material acquisition and preparation stages are calculated respectively; a bamboo product processing and preparing stage; logistics and transportation of raw materials, products and waste materials; the total amount of carbon footprints in the waste disposal and resource utilization stages is calculated, and the calculated sum of the carbon footprints in all the stages is summarized; and then considering human health, ecological system quality and resource consumption energy of the four stages, and calculating a total damage value of the four stages, namely the degree of influence on the environment. According to the method, the full-life-cycle evaluation process of the bamboo products is simplified, the full-life-cycle evaluation efficiency of the bamboo products is improved, the ecological benefits and environmental protection attributes of the bamboo products are determined, and the full-life-cycle process of the bamboo products is comprehensively evaluated from the perspectives of green development, low-carbon technology and the like; technical support and data reference are provided for green low-carbon transformation in the bamboo product production and preparation process.

Description

Technical Field

[0001] The present invention relates to the technical field of bamboo product carbon footprint evaluation, and in particular to an evaluation method for the carbon footprint and environmental impact of bamboo products throughout their entire life cycle. Background Art

[0002] A product's carbon footprint is the sum of its lifecycle greenhouse gas emissions and removals, expressed in carbon dioxide equivalents. Wood and bamboo products, made primarily from wood or bamboo using various processing methods and joining techniques, represent an extension of the natural utilization of forest resources and serve as an important vehicle for carbon storage and sequestration. Evaluating the carbon footprint of bamboo products is crucial for the low-carbon and high-quality development of the bamboo industry. However, carbon footprint accounting for wood and bamboo products is still in its infancy, and industry players are not yet paying enough attention to it.

[0003] At present, the following problems still exist in the field of carbon footprint assessment of bamboo products: the inventory data of the entire life cycle is incomplete and lacks data support that conforms to the actual production scenarios; the scope of the entire life cycle assessment is incomplete and ignores the continuity and integrity of the entire life cycle.

[0004] Based on this, we designed an assessment method for the carbon footprint and environmental impact of bamboo products throughout their life cycle to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to solve the shortcomings of the existing technology in the carbon footprint evaluation of bamboo products, such as incomplete scope and full life cycle inventory data, lack of primary data and refined data support that conforms to actual production scenarios, and ignoring the continuity and integrity of the entire life cycle. An assessment method for the carbon footprint and environmental impact of bamboo products throughout their life cycle is proposed.

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

[0007] A method for assessing the carbon footprint and environmental impact of bamboo products throughout their life cycle, including the following stages:

[0008] Phase 1: Raw material acquisition and preparation phase. The total carbon footprint obtained in this phase is CF x，S1 ;

[0009] Phase 2, bamboo product processing and preparation phase, the total carbon footprint obtained in this phase is CF x，S2 ;

[0010] Phase 3, logistics and transportation of raw materials, products and waste, the total carbon footprint obtained in this phase is CF x，S3 ;

[0011] Phase 4: waste disposal and resource utilization. The total carbon footprint obtained in this phase is CF x，S4 ;

[0012] The total carbon footprint of bamboo products throughout their life cycle CF x , calculated according to formula (1):

[0013] CF x =CF x，S1 +CF x，S2 +CF x，S3 +CF x，S4 (1)

[0014] The total damage value of the four stages is calculated according to formula (2):

[0015] TD x =w HH ×∑HH x，Si +w EQ ×∑EQ x，Si +w RS ×∑RS x，Si (2)

[0016] Among them, HH x For human health, EQ x For ecosystem quality, RS x is the weighted sum of resource consumption; x is the type of bamboo, w HH 、w EQ and w RS The weights of environmental impact assessment indicators for human health, ecosystems, and resource consumption.

[0017] As a further preferred solution of the present invention: In the first stage, the raw material acquisition and preparation stage, the total carbon footprint of the entire life cycle of the acquisition and preparation stage of different bamboo raw materials includes bamboo materials, packaging materials, adhesives and lubricant raw materials, and is calculated according to formula (3):

[0018] CF x，S1 =CF x，S1，1 +CF x，S1，2 +CF x，S1，3 +CF x，S1，4 (3)

[0019] Where, CF x，S1，1 CF x，S1，2 CF x，S1，3 CF x，S1，4 They are the carbon footprints of bamboo raw materials, corrugated boxes, phenolic resin adhesives, and lubricating oils in the preparation of bamboo products;

[0020] CF x，S1，1 =W bamboo ×f1 (4)

[0021] W bamboo and f1 are the mass of bamboo raw materials and the carbon emission coefficient of bamboo, respectively;

[0022] W bamboo =(ρ×1-W1)×(1-0.1) / (1-w) (5)

[0023]

[0024] k=t0 / 100 (7)

[0025] In the above formula, ρ is the density of bamboo products, W1 is the amount of glue applied to bamboo, w is the moisture content of bamboo raw materials, f C is the carbon content of bamboo, and M C are the relative molecular weights of carbon dioxide and carbon, respectively; k is the biomass carbon sequestration coefficient, and t0 is the number of years that bamboo products can exert their carbon sequestration effect;

[0026] The carbon footprints of corrugated paper boxes, phenolic resin adhesives, and lubricating oils in the preparation of bamboo products are calculated according to formula (8):

[0027] CF x，S1，i =W 2，i ×f 2，i (8)

[0028] Where i is the type of raw material required in the preparation of bamboo products, W 2，i is the amount of raw materials used in the raw material acquisition and preparation stage, f 2，i is the carbon emission coefficient of the raw material.

[0029] As a further preferred solution of the present invention: In the first stage, during the raw material acquisition and preparation stage, human health HH x，S1 , ecosystem quality EQ x，S1 and resource consumption indicator RS x，S1 Calculate according to formula (9), formula (10) and formula (11) respectively:

[0030] HH x，S1 =∑W i ×f HH，S1，i (9)

[0031] EQ x，S1 =∑W i ×f EQ，S1，i (10)

[0032] RS x，S1 =∑W i ×f RS，S1，i (11)

[0033] In the above formula, W i is the usage of raw material i, f HH，S1，i 、f EQ，S1，i and f RS，S1，i are the comprehensive impact coefficients of raw material i on human health, ecosystem quality, and resource consumption indicators, respectively.

[0034] As a further preferred solution of the present invention: In the second stage, the total carbon emissions of the bamboo product processing and preparation stage during the entire life cycle include the electricity energy, steam energy, and biomass pellet energy consumed in the production of bamboo products. The total carbon footprint obtained in this stage is CF x，S2 , calculated according to formula (12):

[0035] CF x，S2 =CF x，S2，1 +CF x，S2，2 +CF x，S2，3 (12)

[0036] Where, CF x，S2，1 CF x，S2，2 and CF x，S2，3 The carbon footprints of electricity energy consumption, saturated steam energy consumption, and biomass pellet energy consumption of x type bamboo products are respectively;

[0037]

[0038] CF x，S2，2 =W3×f x，3 (14)

[0039] f x，3 =Q×f4 (15)

[0040] In the above formula, P j and t j are the power and working time of equipment in different production links of x type bamboo products in the bamboo product processing and preparation stage, respectively, x，2 is the carbon emission coefficient of electricity consumption, W3 is the amount of saturated steam required to produce bamboo products, f x，3 is the carbon emission coefficient of saturated steam, Q is the energy of steam, f4 is the carbon emission coefficient of energy when burning bamboo waste, x is the type of bamboo; i is the type of raw materials required in the preparation of bamboo products;

[0041] The carbon footprint of the energy consumption of biomass pellets in the production of bamboo products is calculated using formula (16):

[0042] CF x，S2，3 =W4×f x，4 (16)

[0043] In the above formula, W4 is the amount of biomass particles required to produce bamboo products, f x，4 is the carbon emission coefficient of biomass pellets.

[0044] As a further preferred solution of the present invention: Stage 2, human health HH during the bamboo product processing and preparation stage x，S2 , ecosystem quality EQ x，S2 , Resource consumption index RS x，S2 Calculate according to formula (17), formula (18) and formula (19) respectively:

[0045] HH x，S2 =∑E j ×f HH，S2，j (17)

[0046] EQ x，S2 =∑E j ×f EQ，S2，j (18)

[0047] RS x，S2 =∑E j ×f RS，S2，j (19)

[0048] In the above formula, E j is the energy consumption, f HH，S2，j 、f EQ，S2，j and f RS，S2，j are the comprehensive impact coefficients of energy consumption on human health, ecosystem quality, and resource consumption indicators, respectively.

[0049] As a further preferred solution of the present invention: In stage three, the total carbon emissions of the logistics and transportation of raw materials, products and waste materials during the whole life cycle include the transportation of raw materials, products and waste materials. The total carbon footprint CF obtained in this stage is x，S3 , calculated according to formula (20) and formula (21):

[0050] CF x，S3 =∑ i CF x，S3，i (20)

[0051] CF x，S3，i =W x，5 ×D x，5 ×f x，5 (twenty one)

[0052] Where W x，5 、D x，5 and f x，5 are the mass of different materials, transportation distance, and carbon emission coefficient of transportation links in the logistics and transportation stages of raw materials, products, and waste of x-type bamboo products. When the transportation object is bamboo raw materials, Wx，5 The value of is set as W5 and calculated according to formula (22), W6 is the mass of bamboo bundles required for producing bamboo products, and W7 is the mass of bamboo materials required for producing bamboo bundles;

[0053] W5=W6×W7 / 1000 (22)

[0054] When the transported items are corrugated boxes, phenolic resin adhesives, lubricating oils, and bamboo products, W x，5 The value of is obtained according to the transport object and the ratio of bamboo material usage to adhesive dry powder usage; D x，5 According to formula (23), FT t and FV t They are freight turnover and freight volume respectively;

[0055] D x，5 =FT t / FV t (twenty three)

[0056] When the transported object is bamboo waste, W x，5 The value of is set to W8 and calculated according to formula (24):

[0057] W8=W 竹制品 (twenty four)

[0058] Among them, W 竹制品 It is determined by the ratio of actual bamboo bundle consumption to bamboo material consumption and adhesive dry powder consumption, as well as the mass of the transported object.

[0059] As a further preferred solution of the present invention: Stage 3, human health HH in the logistics and transportation stage of raw materials, products and wastes x，S3 , ecosystem quality EQ x，S3 , Resource consumption index RS x，S3 Calculate according to formula (25), formula (26) and formula (27) respectively:

[0060] HH x，S3 =∑W x，5 ×D x，5 ×f HH，S3，m (25)

[0061] EQ x，S3 =∑W x5 ×D x5 ×f EQ，S3，m (26)

[0062] RS x，S3 =∑W x，5 ×D x，5 ×f RS，S3，m (27)

[0063] Among them, f HH，S3，m 、f EQ，S3，m and f RS，S3，m are the comprehensive impact coefficients of transportation modes on human health, ecosystem quality, and resource consumption indicators, respectively.

[0064] As a further preferred solution of the present invention: Stage 4, the total carbon emissions of the whole life cycle of the waste disposal and resource utilization stage includes the final disposal of the waste and the waste resource utilization. The total carbon footprint CF obtained in this stage is x，S4 , calculated according to the following formula:

[0065] CF x，S4 =∑ j CF x，S4，j (28)

[0066] CF x，S4，j is the carbon footprint of different bamboo waste disposal methods in the waste disposal and resource utilization stages of bamboo products of type 1, and j is the different disposal methods of bamboo waste;

[0067] When the incineration + landfill + resource utilization method is used for the disposal of domestic waste, the carbon footprint of bamboo waste treated by incineration, landfill, resource utilization and other different disposal methods is set as CF x，S4，1 CF x，S4，2 CF x，S4，3 , and calculate according to formula (29), formula (30), and formula (31) respectively:

[0068] CF x，S4，1 =W8×r1×f x，S4，1 (29)

[0069] CF x，S4，2 =W8×r2×f x，S4，2 (30)

[0070] CF x，S4，3 =W8×r3×f x，S4，3 (31)

[0071] r1, r2, and r3 are the proportions of waste materials disposed of through incineration, landfill, and resource utilization, respectively, and are calculated using formula (32):

[0072] r k =W k / W9 (32)

[0073] W k is the total amount of domestic waste treated by different disposal methods, W9 is the total amount of domestic waste that needs to be treated;

[0074] f x，S4，1 、fx，S4，2 and f x，S4，3 These are the carbon emission coefficients when bamboo waste is treated through different disposal methods such as incineration, landfill, and resource utilization;

[0075] When other disposal methods of bamboo waste are adopted, the carbon footprint of the corresponding process is set as CF x，S4，4 , and calculate according to formula (33):

[0076] CF x，S4，4 =W8×f x，S4，4 (33)

[0077] f x，S4，4 The carbon emission coefficient of bamboo waste treated by other means is calculated according to formula (34):

[0078] f x，S4，4 =(f treatment +f compost )-f org (34)

[0079] f treatment and f compost are the carbon emission coefficients of bamboo waste per unit mass in the pretreatment stage and formal disposal stage, respectively. org The carbon emission coefficient of commercially available products prepared using this disposal method per unit mass of bamboo products.

[0080] As a further preferred solution of the present invention: Stage 4, waste disposal and resource utilization stage human health HH x，S4 , ecosystem quality EQ x，S4 , Resource consumption index RS x，S4 Calculate according to formula (35), formula (36) and formula (37) respectively:

[0081] HH x，S4 =∑W t ×f HH，S4，t (35)

[0082] EQ x，S4 =∑W t ×f EQ，S4，t (36)

[0083] RS x，S4 =∑W t ×f RS，S4，t (37)

[0084] Where W t The amount of waste treated by disposal, f HH，S4，t 、f EQ，S4，t and f RS，S4，tIt is the comprehensive impact coefficient of disposal methods on human health, ecosystem quality, and resource consumption indicators.

[0085] Compared with the prior art, the present invention has the following beneficial effects:

[0086] The present invention comprehensively considers the scope of actual production scenarios involved in the carbon footprint of bamboo products, takes into account the integrity and consistency of the assessment, and makes the scope of bamboo product carbon footprint assessment and the full life cycle inventory data complete. At the same time, it simplifies the full life cycle assessment process of bamboo products, improves the efficiency of the full life cycle assessment of bamboo products, and clarifies the ecological benefits and environmental protection attributes of bamboo products. The present invention is universal when used for the carbon footprint and environmental impact assessment of bamboo products, and can optimize the full life cycle assessment process of bamboo products, and accurately, quickly and efficiently quantify the ecological benefits of different types of bamboo products. The present invention identifies the key control factors of the carbon footprint and environmental impact of bamboo products throughout their life cycle, clarifies the technical route for the green and low-carbon transformation of bamboo products, and realizes the path optimization and quality and efficiency improvement of the bamboo product production link. The present invention comprehensively evaluates the full life cycle process of bamboo products from the perspectives of green development and low-carbon technology, and provides technical support and data reference for the green and low-carbon transformation of bamboo products in the production and preparation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] Figure 1 This is a flow chart of a method proposed in the present invention for assessing the carbon footprint and environmental impact of bamboo products throughout their life cycle. DETAILED DESCRIPTION

[0088] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0089] Example 1:

[0090] A method for assessing the carbon footprint and environmental impact of bamboo products throughout their life cycle, including the following stages:

[0091] Phase 1: Raw material acquisition and preparation phase. The total carbon footprint obtained in this phase is CF x，S1 ;

[0092] Phase 2, bamboo product processing and preparation phase, the total carbon footprint obtained in this phase is CF x，S2 ;

[0093] Phase 3, logistics and transportation of raw materials, products and waste, the total carbon footprint obtained in this phase is CF x，S3 ;

[0094] Phase 4: waste disposal and resource utilization. The total carbon footprint obtained in this phase is CFx，S4 ;

[0095] The total carbon footprint of bamboo products throughout their life cycle CF x , calculated according to formula (1):

[0096] CF x =CF x，S1 +CF x，S2 +CF x，S3 +CF x，S4 (1)

[0097] The total damage value of the four stages is calculated according to formula (2):

[0098] TD x =w HH ×∑HH x，Si +w EQ ×∑EQ x，Si +w RS ×∑RS x，Si (2)

[0099] Among them, HH x For human health, EQ x For ecosystem quality, RS x is the weighted sum of resource consumption; x is the type of bamboo (including but not limited to bamboo reconstructed wood, bamboo laminated wood, and bamboo flattened wood), w HH 、w EQ and w RS The weights of environmental impact assessment indicators for human health, ecosystems, and resource consumption, including but not limited to carcinogenic potential, organic respiratory toxicity, inorganic respiratory toxicity, radiation, ecotoxicity, acidification / eutrophication potential, mineral depletion, and fossil fuel depletion.

[0100] Specifically, stage one, raw material acquisition and preparation stage:

[0101] The total carbon footprint of the entire life cycle of the acquisition and preparation of different bamboo raw materials in this stage includes bamboo materials, packaging materials, adhesives and lubricant raw materials, and is calculated according to formula (3):

[0102] CF x，S1 =CF x，S1，1 +CF x，S1，2 +CF x，S1，3 +CF x，S1，4 (3)

[0103] Where, CF x，S1，1 CF x，S1，2 CF x，S1，3 CF x，S1，4They are the carbon footprints of bamboo raw materials, corrugated boxes, phenolic resin adhesives, and lubricating oils in the preparation of bamboo products;

[0104] CF x，S1，1 =W bamboo ×f1 (4)

[0105] W bamboo and f1 are the mass of bamboo raw materials and the carbon emission coefficient of bamboo, respectively;

[0106] W bamboo =(ρ×1-W1)×(1-0.1) / (1-w) (5)

[0107]

[0108] k=t0 / 100 (7)

[0109] In the above formula, ρ is the density of bamboo products, W1 is the amount of glue applied to bamboo, w is the moisture content of bamboo raw materials, f C is the carbon content of bamboo, and M C are the relative molecular weights of carbon dioxide and carbon, respectively; k is the biomass carbon sequestration coefficient, and t0 is the number of years that bamboo products can exert their carbon sequestration effect;

[0110] The carbon footprints of corrugated paper boxes, phenolic resin adhesives, and lubricating oils in the preparation of bamboo products are calculated according to formula (8):

[0111] CF x，S1，i =W 2，i ×f 2，i (8)

[0112] Where i is the type of raw material required in the preparation of bamboo products, W 2，i is the amount of raw materials used in the raw material acquisition and preparation stage, f 2，i is the carbon emission coefficient of the raw material.

[0113] Human health during the acquisition and preparation of raw materials x，S1 , ecosystem quality EQ x，S1 and resource consumption indicator RS x，S1 Calculate according to formula (9), formula (10) and formula (11) respectively:

[0114] HH x，S1 =∑W i xf HH，S1，i (9)

[0115] EQ x，S1 =∑W i ×f EQ，S1，i (10)

[0116] RS x，S1 =∑W i ×f RS，S1，i (11)

[0117] In the above formula, W i is the usage of raw material i, f HH，S1，i 、f EQ，S1，i and f RS，S1，i are the comprehensive impact coefficients of raw material i on human health, ecosystem quality, and resource consumption indicators, respectively.

[0118] Phase II: The total carbon emissions during the entire life cycle of bamboo product processing and preparation include electricity, steam, and biomass pellet energy consumed in the production of bamboo products. The total carbon footprint obtained in this phase is CF x，S2 , calculated according to formula (12):

[0119] CF x，S2 =CF x，S2，1 +CF x，S2，2 +CF x，S2，3 (12)

[0120] Where, CF x，S2，1 CF x，S2，2 and CF x，S2，3 These are the carbon footprints of electricity energy consumption, saturated steam energy consumption, and biomass pellet energy consumption of x type bamboo products.

[0121]

[0122] CF x，S2，2 =W3×f x，3 (14)

[0123] f x，3 =Q×f4 (15)

[0124] In the above formula, P j and t j are the power and working time of equipment in different production links of x type bamboo products in the bamboo product processing and preparation stage, respectively, x，2 is the carbon emission coefficient of electricity consumption, W3 is the amount of saturated steam required to produce bamboo products, f x，3 is the carbon emission coefficient of saturated steam, Q is the energy of steam, f4 is the carbon emission coefficient of energy when burning bamboo waste, x is the type of bamboo; i is the type of raw materials required in the preparation of bamboo products.

[0125] The carbon footprint of the energy consumption of biomass pellets in the production of bamboo products is calculated using formula (16):

[0126] CF x，S2，3 =W4×fx，4 (16)

[0127] In the above formula, W4 is the amount of biomass particles required to produce bamboo products, f x，4 is the carbon emission coefficient of biomass pellets.

[0128] Human health during the processing and preparation of bamboo products x，S2 , ecosystem quality EQ x，S2 , resource consumption index CF x，S2 Calculate according to formula (17), formula (18) and formula (19) respectively:

[0129] HH x，S2 =∑E j ×f HH，S2，j (17)

[0130] EQ x，S2 =∑E j ×f EQ，S2，j (18)

[0131] RS x，S2 =∑E j ×f RS，S2，j (19)

[0132] In the above formula, E j is the energy consumption, f HH，S2，j 、f EQ，S2，j and f RS，S2，j are the comprehensive impact coefficients of energy consumption on human health, ecosystem quality, and resource consumption indicators, respectively.

[0133] Phase 3: The total carbon emissions of the entire life cycle of the logistics and transportation of raw materials, products and waste include the transportation of raw materials, products and waste. The total carbon footprint CF obtained in this phase is x，S3 , calculated according to formula (20) and formula (21):

[0134] CF x，S3 =∑ i CF x，S3，i (20)

[0135] CF x，S3，i =W x，5 ×D x，5 ×f x，5 (twenty one)

[0136] Where W x，5 、D x，5 and f x，5 They are the mass of different materials, transportation distance, and carbon emission coefficient of the transportation link in the logistics and transportation stages of raw materials, products, and waste of x type bamboo products.

[0137] When the transported object is bamboo raw materials, W x，5 The value of is set as W5 and calculated according to formula (22), W6 is the mass of bamboo bundles required for producing bamboo products, and W7 is the mass of bamboo materials required for producing bamboo bundles;

[0138] W5=W6×W7 / 1000 (22)

[0139] When the transported items are corrugated boxes, phenolic resin adhesives, lubricating oils, and bamboo products, W x，5 The values ​​of D are calculated according to Table 1; x，5 According to formula (23), FT t and FV t They are freight turnover and freight volume respectively;

[0140] D x，5 =FT t / FV t (twenty three)

[0141] In this section, W x，5 is calculated as follows:

[0142] (1) First, determine the type of bamboo product and test the bamboo-to-glue ratio (i.e., the ratio of bamboo material to adhesive powder) of the bamboo product through indoor experiments;

[0143] (2) According to the bamboo-glue ratio of bamboo products, they are classified according to the transportation objects, and the W of different bamboo products (laminated materials, reconstructed materials, flattened materials, composite materials) and raw materials are determined respectively. x，5 Numeric value.

[0144] For example, when the Q of bamboo laminated wood is 1.3, W x，5 The corresponding values ​​are: the mass of the corrugated box is 1.3*30=39kg, the mass of the phenolic resin adhesive is (1.3-1)*400=120kg, and the mass of the lubricating oil is 1.3*16=20.8kg;

[0145] The actual consumption of bamboo bundles for laminated wood products is 2080kg, so the corresponding W 竹制品 The bamboo consumption is 2080*1.3+120=2824kg.

[0146] Table 1 W x，5 Numerical calculation table

[0147]

[0148] When the transported object is bamboo waste, W x，5 The value of is set to W8 and calculated according to formula (24):

[0149] W8=W 竹制品 (twenty four)

[0150] Among them, W 竹制品 The calculation method is based on the ratio of actual bamboo bundle consumption to bamboo material consumption to adhesive powder consumption and the mass of the transported object. The calculation method is based on the bamboo material consumption of bamboo products in the above table, that is, W 竹制品 =Actual consumption of bamboo bundles*(amount of bamboo material used / amount of adhesive powder used)+mass of the transported object.

[0151] Human health in the logistics and transportation of raw materials, products and waste x，53 , ecosystem quality EQ x，S3 , Resource consumption index RS x，S3 Calculate according to formula (25), formula (26) and formula (27) respectively:

[0152] HH x，S3 =∑W x，5 ×D x，5 ×f HH，S3，m (25)

[0153] EQ x，S3 =∑W x，5 ×D x，5 ×f EQ，S3，m (26)

[0154] RS x，S3 =∑W x，5 ×D x，5 ×f RS，S3，m (27)

[0155] Among them, f HH，S3，m 、f EQ，S3，m and f RS，S3，m are the comprehensive impact coefficients of transportation modes on human health, ecosystem quality, and resource consumption indicators, respectively.

[0156] Phase 4: Waste disposal and resource utilization. The total carbon emissions during the entire life cycle include the final disposal of waste and waste resource utilization. The total carbon footprint obtained in this phase is CF x，S4 , calculated according to the following formula:

[0157] CF x，S4 =Σ j CF x，S4，j (28)

[0158] CF x，S4，j is the carbon footprint of different bamboo waste disposal methods in the waste disposal and resource utilization stages of bamboo products of type 1, and j is the different disposal methods of bamboo waste;

[0159] When the incineration + landfill + resource utilization method is used for the disposal of domestic waste, the carbon footprint of bamboo waste treated by incineration, landfill, resource utilization and other different disposal methods is set as CF x，S4，1 CF x，S4，2 CF x，S4，3 , and calculate according to formula (29), formula (30), and formula (31) respectively:

[0160] CF x，S4，1 =W8×r1×f x，S4，1 (29)

[0161] CF x，S4，2 =W8×r2×f x，S4，2 (30)

[0162] CF x，S4，3 =W8×r3×f x，S4，3 (31)

[0163] r1, r2, and r3 are the proportions of waste materials disposed of through incineration, landfill, and resource utilization, respectively, and are calculated using formula (32):

[0164] r k =W k / W9 (32)

[0165] W k is the total amount of domestic waste treated by different disposal methods, W9 is the total amount of domestic waste that needs to be treated;

[0166] f x，S4，1 、f x，S4，2 and f x，S4，3 These are the carbon emission coefficients when bamboo waste is treated through different disposal methods such as incineration, landfill, and resource utilization;

[0167] When other disposal methods of bamboo waste are adopted, the carbon footprint of the corresponding process is set as CF x，S4，4 , and calculate according to formula (33):

[0168] CF x，S4，4 =W8×f x，S4，4 (33)

[0169] f x，S4，4 The carbon emission coefficient of bamboo waste treated by other means is calculated according to formula (34):

[0170] f x，S4，4 =(f treatment +f compost )-f org (34)

[0171] ftreatment and f compost are the carbon emission coefficients of bamboo waste per unit mass in the pretreatment stage and formal disposal stage, respectively. org The carbon emission coefficient of commercially available products prepared using this disposal method per unit mass of bamboo products.

[0172] Human health during the waste disposal and resource utilization phase x，S4 , ecosystem quality EQ x，S4 , Resource consumption index RS x，S4 Calculate according to formula (35), formula (36) and formula (37) respectively:

[0173] HH x，S4 =∑W t ×f HH，S4，t (35)

[0174] EQ x，S4 =∑W t ×f EQ，S4，t (36)

[0175] RS x，S4 =∑W t ×f RS，S4，t (37)

[0176] Where W t The amount of waste treated by disposal, f HH，S4，t 、f EQ，S4，t and f RS，S4，t It is the comprehensive impact coefficient of disposal methods on human health, ecosystem quality, and resource consumption indicators.

[0177] Example 2:

[0178] This example further illustrates the application of the carbon footprint and environmental impact assessment method for bamboo products throughout their life cycle in combination with actual data.

[0179] According to the division principle and evaluation scope of the life cycle of bamboo reconstructed materials in this study, 1m 3 The carbon footprint of different types of bamboo recombinant materials is calculated according to formula (1), where x is the type of specific bamboo recombinant material, CF x，S1 CF x，S2 CF x，S3 CF x，S4 1m respectively 3 Carbon footprint of x type bamboo reconstituted wood in phases 1 to 4, in kg CO2eq / m 3 .

[0180] CF x =CF x，S1 +CF x，S2+CF x，S3 +CF x，S4 (1)

[0181] In formula (1), CF x，S1 According to formula (2), the corresponding CF x，S1，1 CF x，S1，2 CF x，S1，3 CF x，S1，4 They are the carbon footprints of bamboo raw materials, corrugated boxes, phenolic resin adhesives, and lubricating oils in the preparation process of bamboo recombinant materials x.

[0182] CF x，S1，1 Calculate according to formula (3), where W bamboo is the mass of bamboo raw material, calculated according to formula (4); ρ is the density of bamboo recombinant material, calculated according to 1200 kg / m 3 Calculate, corresponding to 1m 3 The quality of bamboo reconstructed wood products 竹制品 1200kg; W1 is 1m 3 The amount of glue applied to bamboo recombinant materials is set as W1 for bamboo recombinant materials A and B under the conditions of hot air carbonization technology and saturated steam carbonization technology respectively. 1，A 、W 1，B , the measured value is W 1，A 、W 1，B are 32.70kg and 27.82kg respectively; w is the moisture content of bamboo raw materials, calculated as 30%. f1 is the carbon emission coefficient of 1kg bamboo (moisture content 30%), calculated according to formula (5); where f C The carbon content of bamboo is calculated as 50%; and M C are the relative molecular weights of CO2 and C, calculated as 44 and 12 respectively. k is the biomass carbon sequestration coefficient, calculated according to formula (6): where t0 is the number of years that bamboo products can exert carbon sequestration effect, which is calculated as 30 years in this embodiment. CF x，S1，2 CF x，S1，3 CF x，S1，4 All calculations are performed according to formula (7), where i is the specific raw material type required in the preparation of bamboo recombinant materials, W 2，i is the amount of raw materials used in the first stage, f 2，i The carbon emission coefficient of the raw material; the amount of corrugated paper box of bamboo recombinant material W in this embodiment 2，i，cbb According to 24kg / m 3 Calculate the adhesive dosage W 2，i，pra Calculate according to W1, the lubricating oil consumption W 2，i，lo Calculate based on 0.02kg / kW·h.

[0183] CF x，S1 =CF x，S1，1 +CF x，S1，2 +CF x，S1，3 +CF x，S1，4 (2)

[0184] CF x，S1，1 =W bamboo ×f1 (3)

[0185] W bamboo =(ρ×1-W1)×(1-0.1) / (1-w) (4)

[0186]

[0187] k=t0 / 100 (6)

[0188] CF x，S1，i =W 2，i ×f 2，i (7)

[0189] CF x，S2 Calculate according to formula (8), where CF x，S2，1 CF x，S2，2 and CF x，S2，3 The carbon footprints of electricity consumption, saturated steam consumption, and biomass pellet consumption for 1 square meter x type of bamboo reconstituted wood are shown respectively.

[0190] CF x，S2，1 Calculate according to formula (9), where P j and t j The power and working time of the equipment in different production links of x-type bamboo recombinant materials in the second stage are obtained through equipment nameplates or actual tests. The relevant data summary and corresponding power consumption are shown in Table 2; x，2 is the carbon emission coefficient of 1kW·h electricity consumption. When considering the average electricity scenario, f x，2 The value is quoted from the "Announcement on the Release of the 2021 Electricity Carbon Dioxide Emission Factor" issued by the National Bureau of Statistics, and is calculated based on 0.56kg CO2 eq / kW·h; when considering biomass power generation, f x，2 The value is quoted from the Ecoinvent database and calculated according to 0.077kg CO2eq / kW·h.

[0191] Table 2 Equipment power, equipment working time and equipment power consumption in different links

[0192]

[0193] CF x，S2，2Calculate according to formula (10), where W3 is the saturated steam required to produce 1 cubic meter of bamboo recombinant material, which is obtained by measuring with a steam flow meter and balancing the entire plant. The W3 of bamboo recombinant materials A and B under the two carbonization technology conditions are set as W 3，A 、W 3，B , after measurement and calculation, we can get W 3，A 、W 3，B They are 0.87t and 6.36t respectively.

[0194] f x，3 is the carbon emission coefficient of 1 ton of saturated steam, calculated according to formula (11): where Q is the energy per ton of steam, quoted from the public data of the National Bureau of Statistics and calculated as 2510 MJ / t; f4 is the carbon emission coefficient per MJ of energy when burning bamboo waste, taken from the Ecoinvent database, which is 0.00752 kg CO2 eq / MJ. CF x，S2，3 Calculation is performed according to formula (12), where W4 is the amount of biomass particles required to produce 1m3 of bamboo recombinant materials. The W4 of bamboo recombinant materials A and B under the two carbonization technology conditions are set as W 4，A 、W 4，B , after measurement and calculation, we can get W 4，A 、W 4，B 0.24t, 0.22t respectively; f x，4 The carbon emission coefficient of 1 ton of biomass pellets is taken from the Ecoinvent database and is 0.44 kg CO2 eq / kg.

[0195] CF x，S2 =CF x，S2，1 +CF x，S2，2 +CF x，S2，3 (8)

[0196]

[0197] CF x，S2，2 =W3×f x，3 (10)

[0198] f x，3 =Q×f4 (11)

[0199] CF x，S2，3 =W4×f x，4 (12)

[0200] Cf x，S3 Calculate according to formula (13) and formula (14), where W x，5 、D x，5 and f x，5The mass, transportation distance, and carbon emission coefficient of different materials in stage three are 1 cubic meter x type of bamboo reconstituted wood.

[0201] When the transported object is bamboo raw materials, W x，5 The value of is set as W5 and calculated according to formula (15), where W6 is the mass of bamboo bundles (moisture content 30%) required to produce 1 cubic meter of bamboo recombinant wood, and W7 is the mass of bamboo materials (moisture content 30%) required to produce 1 ton of bamboo bundles. It can be obtained from actual measurement that W6 is 2041 kg. The W7 of bamboo recombinant wood A and B under the two carbonization technology conditions are set as W 7，A 、W 7，B , the measured value is W 7，A 、W 7，B They are 2395kg and 2051kg respectively.

[0202] Since bamboo processing enterprises are concentrated in the production areas of bamboo raw materials, D x，5 It can be set to 10km, and the transportation method is selected as a freight truck with a load capacity of 7.5-16 tons. The corresponding f x，5 It is 0.24 kg CO2 eq / t·km, taken from the Ecoinvent database.

[0203] When the transported items are corrugated boxes, phenolic resin adhesives, lubricating oils, and bamboo recombinant materials, W x，5 The values ​​of are calculated according to Table 1. It is known that the bamboo glue ratio of bamboo products is 1.2. Then the W of corrugated boxes, phenolic resin adhesives, lubricating oils, and bamboo recombinant wood products is x，5 They are 1.2×22=26.4kg, (1.2-1)×460=92kg, 1.2×8=9.6kg respectively. The actual bamboo bundle usage is 2500kg. Then W 竹制品 The product mass is 2500×1.2+92=3092kg.

[0204] D x，5 Calculate according to formula (16), where FT t and FV t The freight turnover and freight volume in 2021 are 22360 billion ton-kilometers and 5298499 million tons respectively, quoted from the China Statistical Yearbook 2021. The transportation mode is freight trucks with a load capacity of more than 32 tons, and the corresponding f x，5 0.10 kg CO2 eq / t·km, taken from the Ecoinvent database.

[0205] When the transported object is bamboo waste, W x，5 The value of is set to W8 and calculated according to formula (17); according to the principle of waste disposal at the nearest place, D x，5Set to 20km, the transportation method is a freight truck with a load capacity of >32 tons, f x，5 The corresponding value is 0.10 kgCO2 eq / t·km, which is taken from the Ecoinvent database.

[0206] CF x，S3 =∑ i CF x，S3，i (13)

[0207] CF x，S3，i =W x，5 ×D x，5 ×f x，5 (14)

[0208] W5=W6×W7 / 1000 (15)

[0209] D x，5 =FT t / FV t (16)

[0210] W8=W 竹制品 (17)

[0211] CF x，S4 According to formula (18), CF x，S4，j is the carbon footprint of 1m3 type bamboo recombinant material in different bamboo waste disposal methods in stage 4, j is the different disposal methods of bamboo waste. When considering the average domestic waste disposal method (incineration + landfill + resource utilization), the carbon footprint of bamboo waste treated by incineration, landfill, resource utilization and other different disposal methods is set as CF x，S4，1 CF x，S4，2 CF x，S4，3 , and calculated according to formula (19), formula (20), and formula (21): where r1, r2, and r3 are the proportions of bamboo waste disposed of by incineration, landfill, resource utilization, etc., respectively, and calculated by formula (22). W k is the total amount of domestic waste treated by different disposal methods (10,000 tons), W9 is the total amount of domestic waste that needs to be treated (10,000 tons), and the relevant data are obtained from the "China Statistical Yearbook 2021". The total amount of domestic waste treated by incineration, landfill, resource utilization and other different disposal methods are 180.197 million, 52.085 million, and 16.111 million tons, respectively. The total amount of domestic waste that needs to be treated is 248.393 million tons. It can be calculated that r1, r2, and r3 are 72.54%, 20.97%, and 6.49%, respectively; f x，S4，1 、f x，S4，2 and f x，S4，3The carbon emission coefficients for bamboo waste disposal through incineration, landfill, and resource utilization are taken from the Ecoinvent database and are 0.015, 0.074, and 0.048 kg CO2 eq / kg, respectively. When considering the disposal method of composting bamboo waste to prepare organic fertilizer, the carbon footprint of the corresponding process is set as CF x，S4，4 , and calculated according to formula (23); where f x，S4，4 This is the carbon emission system of treating bamboo waste by composting to produce organic fertilizer.

[0212] CF x，S4 =∑ j CF x，S4，j (18)

[0213] CF x，S4，1 =W8×r1×f x，S4，1 (19)

[0214] CF x，S4，2 =W8×r2×f x，S4，2 (20)

[0215] CF x，S4，3 =W8×r3×f x，S4，3 (twenty one)

[0216] r k =W k / W9 (22)

[0217] CF x，S4，4 =W8×f x，S4，4 (twenty three)

[0218] f x，S4，4 =(f treatment +f compost )-f org (twenty four)

[0219] In calculating the f of the scenario of using composting to prepare organic fertilizer to treat bamboo waste x，S4，4When, the research results show that under the treatment combination conditions of 60% bamboo shoot processing waste + 40% bamboo processing waste, the organic fertilizer after fermentation of the mixture has the best effect on increasing the germination index of green vegetable seeds. The corresponding organic fertilizer has a total nitrogen content of 7.33g / kg, a density of 510kg / m3, and a moisture content of 70.29%. Therefore, the material composition under this combination is selected for composting. In this embodiment, it is assumed that the mass of the material before and after composting remains unchanged, and the moisture content of the mixed bamboo waste is 15%. Then, for every 1kg of organic fertilizer produced, the corresponding dry matter mass is 1×(1-0.7029)=0.2971kg, and the mass of the dry matter used from the bamboo waste is 0.2971×0.4=0.1188kg, corresponding to the amount of bamboo waste used for 15% is 0.1188 / 0.15=0.7920kg. After preparing organic fertilizer by composting bamboo waste, the production of organic fertilizer under other methods can be saved. Therefore, this part of carbon emissions is deducted during calculation, f x，S4，4 Calculate according to formula (24). In formula (24), f treatment and f compost The carbon emission coefficients of 1 kg of bamboo waste in the pretreatment stage and composting stage are taken from the Ecoinvent database, which are 0.048 and 0.45 kg CO2 eq / kg respectively; f org is the carbon emission coefficient of organic fertilizer, taken from the Ecoinvent database, which is 0.093kg CO2 eq / kg. According to formula (24), f x，S4，4 It is 0.298kg CO2 eq / kg.

[0220] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A method for assessing the carbon footprint and environmental impact of bamboo products throughout their life cycle, characterized by: The following stages are included: Phase 1: Raw material acquisition and preparation phase. The total carbon footprint obtained in this phase is CF x，S1 ; Phase 2, bamboo product processing and preparation phase, the total carbon footprint obtained in this phase is CF x，S2 ; Phase 3, logistics and transportation of raw materials, products and waste, the total carbon footprint obtained in this phase is CF x，S3 ; Phase 4: waste disposal and resource utilization. The total carbon footprint obtained in this phase is CF x，S4 ; The total carbon footprint of bamboo products throughout their life cycle CF x , calculated according to formula (1): CF x =CF x,S1 +CF x,S2 +CF x，S3 +CF x,S4 (1) The total damage value of the four stages is calculated according to formula (2): TD x =w HH ×∑HH x,Si +w EQ ×∑EQ x,Si +w RS ×∑RS x，Si (2) Among them, HH x For human health, EQ x For ecosystem quality, RS x is the weighted sum of resource consumption; x is the type of bamboo, w HH 、w EQ and w RS The weights of environmental impact assessment indicators for human health, ecosystems, and resource consumption.

2. The method for assessing the carbon footprint and environmental impact of bamboo products throughout their life cycle according to claim 1, wherein: Phase 1: Raw material acquisition and preparation phase. The total carbon footprint of the entire life cycle of different bamboo raw material acquisition and preparation phases includes bamboo, packaging materials, adhesives, and lubricant raw materials, and is calculated according to formula (3): CF x,S1 =CF x,S1，1 +CF x,S1,2 +CF x,S1，3 +CF x,S1,4 (3) Where, CF x，S1，1 CF x，S1，2 CF x，S1，3 CF x，S1，4 They are the carbon footprints of bamboo raw materials, corrugated boxes, phenolic resin adhesives, and lubricating oils in the preparation of bamboo products; CF x,S1,1 =W bamboo ×f1 (4) W bamboo and f1 are the mass of bamboo raw materials and the carbon emission coefficient of bamboo, respectively; IN bamboo =(ρ×1-W1)×(1-0.1) / (1-w) (5) k=t0 / 100 (7) In the above formula, ρ is the density of bamboo products, W1 is the amount of glue applied to bamboo, w is the moisture content of bamboo raw materials, f C is the carbon content of bamboo, and M C are the relative molecular weights of carbon dioxide and carbon, respectively; k is the biomass carbon sequestration coefficient, and t0 is the number of years that bamboo products can exert their carbon sequestration effect; The carbon footprints of corrugated paper boxes, phenolic resin adhesives, and lubricating oils in the preparation of bamboo products are calculated according to formula (8): CF x,S1,i =W 2，i ×f 2，i (8) Where i is the type of raw material required in the preparation of bamboo products, W 2，i is the amount of raw materials used in the raw material acquisition and preparation stage, f 2，i is the carbon emission coefficient of the raw material.

3. The method for assessing the carbon footprint and environmental impact of bamboo products throughout their life cycle according to claim 1, wherein: Phase 1: Raw material acquisition and preparation process, human health HH x，S1 , ecosystem quality EQ x，S1 and resource consumption indicator RS x，S1 Calculate according to formula (9), formula (10) and formula (11) respectively: HH x,S1 =∑W i ×f HH，S1,i (9) EQ x,S1 =∑W i ×f EQ,S1,i (10) RS x，S1 =∑W i ×f RS,S1,i (11) In the above formula, W i is the usage of raw material i, f HH，S1，i 、f EQ，S1，i and f RS，S1，i are the comprehensive impact coefficients of raw material i on human health, ecosystem quality, and resource consumption indicators, respectively.

4. The method for assessing the carbon footprint and environmental impact of bamboo products throughout their life cycle according to claim 1, wherein: Phase II: The total carbon emissions during the entire life cycle of bamboo product processing and preparation include electricity, steam, and biomass pellet energy consumed in the production of bamboo products. The total carbon footprint obtained in this phase is CF x，S2 , calculated according to formula (12): CF x，S2 =CF x，S2,1 +CF x,S2,2 +CF x,S2,3 (12) Where, CF x，S2，1 CF x，S2，2 and CF x，S2，3 The carbon footprints of electricity energy consumption, saturated steam energy consumption, and biomass pellet energy consumption of x type bamboo products are respectively; CF x，S2，2 =W3×f x，3 (14) f x,3 =Q×f4 (15) In the above formula, P j and t j are the power and working time of equipment in different production links of x type bamboo products in the bamboo product processing and preparation stage, respectively, x，2 is the carbon emission coefficient of electricity consumption, W3 is the amount of saturated steam required to produce bamboo products, f x，3 is the carbon emission coefficient of saturated steam, Q is the energy of steam, f4 is the carbon emission coefficient of energy when burning bamboo waste, x is the type of bamboo; i is the type of raw materials required in the preparation of bamboo products; The carbon footprint of the energy consumption of biomass pellets in the production of bamboo products is calculated using formula (16): CF x，S2,3 =W4×f x，4 (16) In the above formula, W4 is the amount of biomass particles required to produce bamboo products, f x，4 is the carbon emission coefficient of biomass pellets.

5. The method for assessing the carbon footprint and environmental impact of bamboo products throughout their life cycle according to claim 1, wherein: Phase 2: Human health during bamboo product processing and preparation x，S2 , ecosystem quality EQ x，S2 , Resource consumption index RS x，S2 Calculate according to formula (17), formula (18) and formula (19) respectively: HH x，S2 =∑E j ×f HH，S2，j (17) EQ x，S2 =∑E j ×f EQ，S2，j (18) RS x，S2 =∑E j ×f RS，S2，j (19) In the above formula, E j is the energy consumption, f HH，S2，j 、f EQ，S2，j and f RS，S2，j are the comprehensive impact coefficients of energy consumption on human health, ecosystem quality, and resource consumption indicators, respectively.

6. The method for assessing the carbon footprint and environmental impact of bamboo products throughout their life cycle according to claim 1, wherein: Phase 3: The total carbon emissions of the entire life cycle of the logistics and transportation of raw materials, products and waste include the transportation of raw materials, products and waste. The total carbon footprint CF obtained in this phase is x，S3 , calculated according to formula (20) and formula (21): CF x，S3 =∑ i CF x,S3，i (20) CF x,S3，i =W x，5 ×D x，5 ×f x，5 (21) Where W x，5 、D x，5 and f x，5 are the mass of different materials, transportation distance, and carbon emission coefficient of transportation links in the logistics and transportation stages of raw materials, products, and waste of x-type bamboo products. When the transportation object is bamboo raw materials, W x,5 The value of is set as W5 and calculated according to formula (22), W6 is the mass of bamboo bundles required for producing bamboo products, and W7 is the mass of bamboo materials required for producing bamboo bundles; W5=W6×W7 / 1000 (22) When the transported items are corrugated boxes, phenolic resin adhesives, lubricating oils, and bamboo products, W x,5 The value of is obtained according to the transport object and the ratio of bamboo material usage to adhesive dry powder usage; D x,5 According to formula (23), FT t and FV t They are freight turnover and freight volume respectively; D x,5 =FT t / FV t (23) When the transported object is bamboo waste, W x，5 The value of is set to W8 and calculated according to formula (24): W8=W 竹制品 (24) Among them, W 竹制品 It is determined by the ratio of actual bamboo bundle consumption to bamboo material consumption and adhesive dry powder consumption, as well as the mass of the transported object.

7. The method for assessing the carbon footprint and environmental impact of bamboo products throughout their life cycle according to claim 6, wherein: Stage 3: Human health during the logistics and transportation of raw materials, products and waste x，S3 , ecosystem quality EQ x，S3 , Resource consumption index RS x，S3 Calculate according to formula (25), formula (26) and formula (27) respectively: HH x，S3 =∑W x,5 ×D x，5 ×f HH，S3，m (25) EQ x，S3 =∑W x，5 ×D x，5 ×f EQ，S3,m (26) RS x，S3 =∑W x，5 ×D x，5 ×f RS，S3,m (27) Among them, f HH，S3，m 、f EQ，S3，m and f RS,S3,m are the comprehensive impact coefficients of transportation modes on human health, ecosystem quality, and resource consumption indicators, respectively.

8. The method for assessing the carbon footprint and environmental impact of bamboo products throughout their life cycle according to claim 6, wherein: Phase 4: Waste disposal and resource utilization. The total carbon emissions during the entire life cycle include the final disposal of waste and waste resource utilization. The total carbon footprint obtained in this phase is CF x，S4 , calculated according to the following formula: CF x，S4 =Σ j CF x,S4，j (28) CF x，S4，j is the carbon footprint of different bamboo waste disposal methods in the waste disposal and resource utilization stages of bamboo products of type 1, and j is the different disposal methods of bamboo waste; When the incineration + landfill + resource utilization method is used for the disposal of domestic waste, the carbon footprint of bamboo waste treated by incineration, landfill, resource utilization and other different disposal methods is set as CF x，S4，1 CF x，S4，2 CF x，S4，3 , and calculate according to formula (29), formula (30), and formula (31) respectively: CF x，S4，1 =W8×r1×f x，S4，1 (29) CF x，S4，2 =W8×r2×f x，S4，2 (30) CF x，S4，3 =W8×r3×f x，S4，3 (31) r1, r2, and r3 are the proportions of waste materials disposed of through incineration, landfill, and resource utilization, respectively, and are calculated using formula (32): r k =W k / W9 (32) W k is the total amount of domestic waste treated by different disposal methods, W9 is the total amount of domestic waste that needs to be treated; f x,S4,1 、f x,S4,2 and f x，S4，3 These are the carbon emission coefficients when bamboo waste is treated through different disposal methods such as incineration, landfill, and resource utilization; When other disposal methods of bamboo waste are adopted, the carbon footprint of the corresponding process is set as CF x，S4，4 , and calculate according to formula (33): CF x，S4,4 =W8×f x，S4，4 (33) f x，S4，4 The carbon emission coefficient of bamboo waste treated by other means is calculated according to formula (34): f x，S4,4 =(f treatment +f compost )-f org (34) f treatment and f compost are the carbon emission coefficients of bamboo waste per unit mass in the pretreatment stage and formal disposal stage, respectively. org The carbon emission coefficient of commercially available products prepared using this disposal method per unit mass of bamboo products.

9. The method for assessing the carbon footprint and environmental impact of bamboo products throughout their life cycle according to claim 1, wherein: Stage 4: Human Health in the Waste Disposal and Resource Utilization Stage x，S4 , ecosystem quality EQ x,S4 , Resource consumption index RS x，S4 Calculate according to formula (35), formula (36) and formula (37) respectively: HH x，S4 =∑W t ×f HH,S4，t (35) EQ x，S4 =∑W t ×f EQ，S4，t (36) RS x，S4 =∑W t ×f RS，S4，t (37) Where W t The amount of waste treated by disposal, f HH,S4,t 、f EQ,S4,t and f RS，S4，t It is the comprehensive impact coefficient of disposal methods on human health, ecosystem quality, and resource consumption indicators.

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