Carbon emission assessment methods and systems for industrial wastewater separation treatment and reuse systems

Abstract

This invention discloses a carbon emission assessment method for industrial wastewater separation treatment and reuse systems, relating to the field of wastewater treatment carbon emission accounting technology. The method includes: classifying process routes according to different wastewater discharge or reuse requirements; determining the accounting boundaries of the industrial wastewater separation treatment and reuse system and identifying the process routes corresponding to each accounting boundary; establishing a carbon accounting model for the industrial wastewater separation treatment and reuse system based on the process routes corresponding to the accounting boundaries, according to the organizational carbon emission accounting rules in the life cycle assessment method; the carbon accounting model for the industrial wastewater separation treatment and reuse system includes a total carbon emission calculation model and a total carbon emission intensity calculation model; and conducting a carbon emission assessment based on the carbon accounting model for the industrial wastewater separation treatment and reuse system. This invention can provide a reliable and feasible carbon emission accounting and assessment path for industrial wastewater treatment and reuse systems.

Description

Technical Field

[0001] This invention relates to the field of carbon emission accounting technology for wastewater treatment, and in particular to a carbon emission assessment method for an industrial wastewater separation treatment and reuse system. Background Technology

[0002] According to incomplete statistics, the wastewater treatment industry accounts for 1%-2% of total carbon emissions, placing it among the top ten high-carbon-emission industries. The industrial sector consumes large amounts of water and discharges wastewater with high pollutant concentrations. Currently, some industrial wastewater treatment has achieved wastewater separation and treatment, as well as advanced wastewater treatment and reuse. However, due to the numerous steps and complex technologies involved, greenhouse gas emissions from wastewater treatment processes are substantial. Faced with strategic needs such as achieving carbon peaking and carbon neutrality, wastewater treatment urgently needs to explore low-carbon and sustainable development paths. This requires establishing carbon emission accounting methods suitable for complex industrial wastewater treatment systems, accurately identifying high-carbon processes, and assessing the contribution of reclaimed water recycling to carbon emissions. The goal is to shift from the traditional "high-consumption pollution control" model to a future paradigm of "resource and energy self-sufficiency - green carbon neutrality." Summary of the Invention

[0003] Based on this, the purpose of this invention is to provide a carbon emission assessment method for industrial wastewater treatment and reuse systems, aiming to provide a reliable and feasible carbon emission accounting and assessment path for industrial wastewater treatment and reuse systems.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] A method for assessing carbon emissions from an industrial wastewater separation treatment and reuse system, comprising:

[0006] The process routes are classified according to different wastewater discharge or reuse requirements; the process routes include pretreatment, biological treatment, advanced treatment and regeneration and reuse.

[0007] The accounting boundaries of the industrial wastewater separation treatment and reuse system are determined, and the process routes corresponding to each accounting boundary are determined; the accounting boundaries include the wastewater treatment stage, the reclaimed water reuse stage, the sludge treatment stage, and the downstream discharge to the centralized municipal sewage treatment plant stage;

[0008] Based on the process route corresponding to the accounting boundary, a carbon accounting model for an industrial wastewater separation treatment and reuse system is established according to the organizational carbon emission accounting rules in the life cycle assessment method; the carbon accounting model for an industrial wastewater separation treatment and reuse system includes a total carbon emission calculation model and a total carbon emission intensity calculation model;

[0009] Carbon emission assessment is conducted based on the carbon accounting model of the industrial wastewater separation treatment and reuse system.

[0010] To achieve the above objectives, the present invention also provides the following solution:

[0011] A carbon emission assessment system for an industrial wastewater separation treatment and reuse system includes:

[0012] The process route classification module is used to classify process routes according to different wastewater discharge or reuse requirements; the process routes include pretreatment, biological treatment, advanced treatment, and regeneration and reuse.

[0013] The accounting boundary determination module is used to determine the accounting boundary of the industrial wastewater separation treatment and reuse system, and to determine the process route corresponding to each accounting boundary; the accounting boundary includes the wastewater treatment stage, the reclaimed water reuse stage, the sludge treatment stage, and the downstream discharge to the centralized municipal sewage treatment plant stage;

[0014] The model building module is used to establish a carbon accounting model for an industrial wastewater separation treatment and reuse system based on the process route corresponding to the accounting boundary and according to the organizational carbon emission accounting rules in the life cycle assessment method; the carbon accounting model for the industrial wastewater separation treatment and reuse system includes a total carbon emission calculation model and a total carbon emission intensity calculation model;

[0015] The carbon emission assessment module is used to assess carbon emissions based on the carbon accounting model of the industrial wastewater separation treatment and reuse system.

[0016] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0017] The carbon emission assessment method and system for industrial wastewater separation treatment and reuse systems provided by this invention can accurately calculate the carbon emissions of industrial wastewater separation treatment and reuse systems through the constructed carbon accounting model, thereby enabling the proposal of corresponding industrial wastewater carbon reduction optimization measures; by separately calculating the carbon emissions of reclaimed water, the climate burden of industrial wastewater reuse can be clarified, and the climate impact of wastewater treatment and reuse can be weighed. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A flowchart illustrating the carbon emission assessment method for an industrial wastewater separation treatment and reuse system provided by this invention.

[0020] Figure 2 A schematic diagram of the accounting boundary for an industrial wastewater separation treatment and reuse system;

[0021] Figure 3 A schematic diagram of the wastewater treatment process of a dyeing and printing company in Yiwu.

[0022] Figure 4 This is a schematic diagram illustrating the carbon emissions at each stage of the wastewater treatment and reuse process of a dyeing and printing enterprise in Yiwu.

[0023] Figure 5 A schematic diagram illustrating the carbon emissions at each stage of the wastewater treatment and reuse process of a dyeing and printing enterprise in Yiwu after applying 50% clean energy.

[0024] Figure 6 This diagram illustrates the proportion of carbon emissions from direct and indirect emissions during the wastewater treatment process of a dyeing and printing company in Yiwu.

[0025] Figure 7 This diagram illustrates the proportion of direct and indirect carbon emissions during the wastewater treatment stage of a dyeing and printing enterprise in Yiwu after applying 50% clean energy. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The purpose of this invention is to provide a carbon emission assessment method for industrial wastewater treatment and reuse systems, aiming to provide a reliable and feasible carbon emission accounting and assessment path for industrial wastewater treatment and reuse systems.

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] like Figure 1 As shown, the carbon emission assessment method for the industrial wastewater separation treatment and reuse system provided in this embodiment includes the following steps:

[0031] S1: Classify the process routes according to different wastewater discharge or reuse requirements; the process routes include pretreatment, biological treatment, advanced treatment and recycling.

[0032] Depending on the specific wastewater discharge or reuse requirements, different discharge standards and applicable processes exist. The process flow is generally structured as a combination of four main units: pretreatment, biological treatment, advanced treatment, and regeneration / reuse. Each treatment unit has its corresponding technology. Pretreatment units include hydrolysis acidification and coagulation sedimentation; biological treatment units include aerobic and anaerobic biological treatment; advanced treatment units include advanced oxidation, activated carbon adsorption, air flotation, and MBR; and regeneration / reuse units include dual-membrane processes and crystallization methods.

[0033] S2: Determine the accounting boundaries of the industrial wastewater separation treatment and reuse system, and determine the corresponding process routes for each accounting boundary; the accounting boundaries include the wastewater treatment stage, the reclaimed water reuse stage, the sludge treatment stage, and the downstream discharge to a centralized municipal wastewater treatment plant stage. The accounting boundaries of the industrial wastewater separation treatment and reuse system are as follows: Figure 2 As shown.

[0034] The accounting boundaries include the on-site industrial wastewater treatment stage, the reclaimed water reuse stage, the sludge treatment stage, and the downstream discharge to a centralized municipal wastewater treatment plant stage. The on-site industrial wastewater treatment stage includes three main units: pretreatment, biological treatment, and advanced treatment. The reclaimed water reuse stage includes the reuse unit and the pumping for reuse. The sludge treatment stage only includes on-site sludge treatment and does not include downstream sludge disposal. The discharge to a centralized municipal wastewater treatment plant stage does not include pipeline transportation.

[0035] Based on the collected and organized main technological process principles, identify the links within the accounting boundary that will generate greenhouse gas emissions, including direct CH4 and N2O emissions involved in biological treatment, and indirect carbon emissions involved in energy and chemical consumption in each link.

[0036] S3: Based on the process route corresponding to the accounting boundary, establish a carbon accounting model for industrial wastewater separation treatment and reuse system according to the organizational carbon emission accounting rules in the life cycle assessment method; the carbon accounting model for industrial wastewater separation treatment and reuse system includes a total carbon emission calculation model and a total carbon emission intensity calculation model.

[0037] According to the organizational carbon emission accounting rules in the life cycle assessment method, the carbon emissions of industrial wastewater multi-stage treatment and reuse systems are divided into three parts: first, direct emissions from the treatment process, including CH4 and N2O; second, indirect carbon emissions generated from the production process of purchased energy; and third, other indirect carbon emissions generated from the production and transportation of purchased chemicals.

[0038] The method for calculating the total carbon emissions E of industrial wastewater separation treatment and reuse systems is as follows:

[0039] E = E 废水处理 +E 再生 +E 污泥 +E 污水厂

[0040] Total carbon emission intensity E of industrial wastewater separation treatment and reuse system 强度 for:

[0041]

[0042] Among them, E 废水处理 It refers to the carbon emissions during the wastewater treatment stage, E 再生 It refers to the carbon emissions during the reclaimed water reuse stage, E 污泥 It refers to the carbon emissions during the sludge treatment stage, E 污水厂 Q represents the carbon emissions at the downstream stage, from discharge to centralized urban wastewater treatment plants. 总 It is the total flow rate entering the industrial wastewater separation treatment and reuse system.

[0043] Furthermore, E 废水处理 =E 好氧 +E 厌氧 +E 废水处理，能源 +E 废水处理，药剂 E 好氧 It is the direct carbon emission of aerobic biological reaction processes, E 厌氧 It is the direct carbon emission of anaerobic biological reaction processes, E 废水处理i，能源 and E 废水处理，药剂 The carbon emissions are generated from the energy and chemicals used in the wastewater treatment stage. E 厌氧 =28·EFCH4·COD 去除 E 废水处理，能源 =EF 能源 AD 废水处理，能源 E 废水处理，药剂 =EF 药剂 AD 废水处理，药剂 , where EF CH4 and EF N2O These are the direct carbon emission factors of CH4 and N2O from industrial wastewater treatment, and COD. 去除 and TN 去除 These represent the COD and TN removal rates during the wastewater treatment stage, respectively, and EF. 能源 and AD 废水处理，能源 These are local energy lifecycle carbon emission factors and energy activity data during the wastewater treatment phase, respectively. 药剂 and AD 废水处理，药剂 These are the lifecycle carbon emission factors and dosages of the agents used in the wastewater treatment stage. When conditions permit, E 好氧 With E 厌氧 It is more recommended to use the measured values.

[0044] Furthermore, E 再生 =E 双膜法 +E结晶法 +E 泵送 E 双膜法 and E 结晶法 These are the energy consumed and the carbon emissions generated by the reagents in the two-film method and the crystallization method, respectively. 泵送 This refers to the carbon emissions generated by the electricity consumed in pumping reclaimed water to the production stage. 双膜法 =EF 能源 AD 双膜法，能源 +EF 药剂 AD 双膜法，药剂 E 结晶法 =EF 能源 AD 结晶法，能源 +EF 药剂 AD 结晶法，药剂 E 泵送 =EF 能源 AD 泵送，能源 AD 双膜法，能源 The amount of energy consumed in the dual-membrane process, AD 双膜法，药剂 This refers to the dosage of drug added in the two-membrane method, AD 结晶法，能源 AD represents the amount of energy that can be consumed in the crystallization process. 结晶法，药剂 The dosage of the drug added during the crystallization process, AD 泵送，能源 Energy consumed in pumping reclaimed water to the production process

[0045] Furthermore, E 污泥 =EF 能源 AD 污泥，能源 +EF 污泥 ·M 干 EF 污泥 Referring to existing literature or databases of sludge treatment lifecycle carbon emission factor data, AD 污泥，能源 M is the energy consumed in the sludge thickening, dewatering and other treatment processes within the plant. 干 This refers to the amount of dry sludge sent out.

[0046] Furthermore, the influent to centralized urban wastewater treatment plants includes domestic sewage and treated industrial wastewater. The carbon emission intensity of urban wastewater treatment plants is determined by referring to existing literature or database data, and then the carbon emission of industrial wastewater is allocated according to COD levels, i.e., E 污水厂 =EF 污水厂 COD' 去除 EF 污水厂 The life-cycle carbon emission factor of urban wastewater treatment plants is expressed in kgCO2 / kgCOD, COD' 去除 It is the amount of COD removed after industrial wastewater enters a municipal sewage treatment plant.

[0047] S4: Carbon emission assessment based on carbon accounting model of industrial wastewater separation treatment and reuse system.

[0048] The above methods also include:

[0049] According to the formula and Calculate the carbon emissions E of reclaimed water 再生水 and carbon emission intensity E 再生水强度 ; where Q 再生水 This is the flow entering the recycling phase, Q. 排放 This refers to the amount of wastewater discharged to downstream centralized wastewater treatment plants.

[0050] Multiple scenarios were set up based on changes in reclaimed water reuse rate and changes in power structure. Combining the actual needs of water scarcity and energy structure transformation, the reclaimed water reuse rate steadily increased in the scenarios, and the energy structure shifted from fossil fuels to clean energy.

[0051] By comparing and analyzing the accounting results, key carbon emission links can be identified, carbon emission reduction schemes can be proposed, and the future carbon emission trends of industrial wastewater treatment and reuse systems can be predicted based on different scenarios, as well as the climate impact of wastewater treatment and reuse can be weighed.

[0052] Example 2

[0053] The following description, in conjunction with a preferred embodiment, further illustrates Embodiment 1. This embodiment uses actual data from the wastewater treatment process of a dyeing and printing enterprise in Yiwu.

[0054] (1) The company's wastewater treatment capacity is 3000m³. 3 / d, the treatment process is equalization tank + primary sedimentation tank + anaerobic + aerobic + secondary sedimentation + air flotation, such as Figure 3 As shown. The effluent quality meets the indirect discharge standards of the "Water Pollutant Discharge Standard for Textile Dyeing and Finishing Industry" (GB4287-2012) and simultaneously meets the discharge standards of Yiwu Water Treatment Co., Ltd.'s Yiting Operations Department before being treated by the Yiwu Water Treatment Co., Ltd.'s Yiting Operations Department through the sewage pipeline network. Reclaimed water reuse employs a dual-membrane process, which effectively removes suspended solids, salts, color, and organic pollutants from the wastewater, ensuring that the effluent meets reuse requirements. Sludge is filtered through a plate and frame filter press and then transported off-site for incineration.

[0055] (2) The boundary of the greenhouse gas emission accounting system extends from the influent to the effluent, including influent wastewater treatment, reclaimed water reuse, sludge treatment, and centralized treatment by Yiwu Water Treatment Co., Ltd. The main sources of greenhouse gases are direct CH4 and N2O emissions from wastewater biochemical treatment, indirect emissions from energy consumption of equipment such as fans and pumps during wastewater treatment, and indirect emissions from polyaluminum chloride added during the flotation process. Carbon emissions from the reclaimed water treatment and sludge treatment stages mainly come from equipment energy consumption. The anaerobic biological treatment stage involves a sealed enclosure and does not emit greenhouse gases.

[0056] (3) Obtain direct CH4 emission factors for industrial wastewater treatment that are closer to the actual situation in China from the literature, and take the IPCC recommended value for N2O emission factors. Background data such as electricity and chemicals are from the ecoinvent database, while carbon emission factors from sludge incineration and centralized wastewater treatment are from literature data.

[0057] (4) The average COD of the effluent from the equalization tank is 1000 mg / L, and the average NH3-N is 15 mg / L; the average COD of the effluent from the primary sedimentation tank is 350 mg / L; the average COD of the effluent from the anaerobic tank is 270 mg / L; the average COD of the effluent from the aerobic tank is 140 mg / L; and the average COD of the effluent from the discharge outlet is 110 mg / L, and the average NH3-N is 4 mg / L. The average electricity consumption related to the wastewater treatment stage is 5000 kWh / day, of which the power consumption of the blower is 2600 kWh / day. An average of 10 bags of PAC (25 kg per bag) are added daily, and the average amount of lime added is 2 t / day. The electricity consumption for regeneration treatment is 4000 kWh / day, and the effluent flow rate is 680 m³ / h. 3 / h.

[0058]

[0059]

[0060]

[0061] E 污水厂 =3.97·0.06=0.2382kgCO2 / m 3

[0062] E=2.4470·3000+5.1882·680-0.9876·3000+0.2382·2320

[0063] =8459kgCO2 / d=2.8196kgCO2 / m 3

[0064]

[0065] (5) Assuming that 50% of the electricity used comes from clean energy, the results are as follows:

[0066]

[0067]

[0068]

[0069] E 污水厂=3.97·0.06=0.2382kgCO2 / m 3

[0070] E=1.7295·3000+2.6559·680-0.9876·3000++0.0206·2320

[0071] =4584kgCO2 / d=1.5281kgCO2 / m 3

[0072]

[0073] (6) The proportion of each part of the carbon emission results Figures 4-7 As shown, carbon emissions from the treatment and reuse of dyeing and printing wastewater, categorized by stage, mainly originate from the wastewater treatment stage. Categorized by direct or indirect emissions, the primary source is indirect carbon emissions from energy use (Scope 2). The use of chemicals also contributes significantly to carbon emissions, necessitating the search for lower-carbon and environmentally friendly alternatives. Sludge incineration for power generation can offset some carbon emissions, and sludge resource utilization may be an effective means of reducing carbon emissions from wastewater treatment. The membrane treatment process in the regeneration stage consumes a large amount of energy, resulting in high carbon emissions from reclaimed water. The use of clean energy can significantly reduce carbon emissions and decrease the greenhouse gas effect of reclaimed water. It is recommended to appropriately reduce the proportion of membrane treatment in reclaimed water and increase the application of clean energy.

[0074] Example 3

[0075] To implement the method corresponding to Embodiment 1 above and achieve the corresponding functions and technical effects, a carbon emission assessment system for an industrial wastewater separation treatment and reuse system is provided below, comprising:

[0076] The process route classification module is used to classify process routes according to different wastewater discharge or reuse requirements; process routes include pretreatment, biological treatment, advanced treatment, and regeneration and reuse.

[0077] The accounting boundary determination module is used to determine the accounting boundaries of the industrial wastewater separation treatment and reuse system, and to determine the process routes corresponding to each accounting boundary. The accounting boundaries include the wastewater treatment stage, the reclaimed water reuse stage, the sludge treatment stage, and the downstream discharge to the centralized municipal wastewater treatment plant stage.

[0078] The model building module is used to establish a carbon accounting model for industrial wastewater separation treatment and reuse systems based on the process route corresponding to the accounting boundary and according to the organizational carbon emission accounting rules in the life cycle assessment method. The carbon accounting model for industrial wastewater separation treatment and reuse systems includes a total carbon emission calculation model and a total carbon emission intensity calculation model.

[0079] The carbon emission assessment module is used to assess carbon emissions based on the carbon accounting model of the industrial wastewater separation treatment and reuse system.

[0080] Also includes:

[0081] The module for calculating carbon emissions and carbon intensity of reclaimed water is used to calculate carbon emissions based on the formula.

[0082] Calculate the carbon emissions E of reclaimed water 再生水 and carbon emission intensity E 再生水强度 ; where Q 再生水 This is the flow entering the recycling phase, Q. 排放 This refers to the amount of wastewater discharged to downstream centralized wastewater treatment plants.

[0083] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0084] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for assessing carbon emissions from an industrial wastewater separation treatment and reuse system, characterized in that, include: The process routes are classified according to different wastewater discharge or reuse requirements; the process routes include pretreatment, biological treatment, advanced treatment and regeneration and reuse. The accounting boundaries of the industrial wastewater separation treatment and reuse system are determined, and the process routes corresponding to each accounting boundary are determined. The accounting boundaries include the wastewater treatment stage, the reclaimed water reuse stage, the sludge treatment stage, and the downstream discharge to the centralized municipal sewage treatment plant stage. Among them, the process route corresponding to the in-plant industrial wastewater treatment stage is pretreatment, biological treatment, and advanced treatment, and the process route corresponding to the reclaimed water reuse stage is regeneration and reuse. Based on the process route corresponding to the accounting boundary, a carbon accounting model for an industrial wastewater separation treatment and reuse system is established according to the organizational carbon emission accounting rules in the life cycle assessment method; the carbon accounting model for an industrial wastewater separation treatment and reuse system includes a total carbon emission calculation model and a total carbon emission intensity calculation model; Carbon emission assessment is conducted based on the carbon accounting model of the industrial wastewater separation treatment and reuse system. The expression for the total carbon emissions calculation model is as follows: E=E 废水处理 +E 再生 +E 污泥 +E 污水厂 The expression for the total carbon emission intensity calculation model is as follows: Where E represents the total carbon emissions, E 强度 E represents total carbon intensity. 废水处理 E represents carbon emissions during the wastewater treatment stage. 再生 E represents carbon emissions during the reclaimed water reuse phase. 污泥 E represents carbon emissions during the sludge treatment stage. 污水厂 Q represents the carbon emissions from downstream discharge to centralized municipal wastewater treatment plants. 总 The total flow rate entering the industrial wastewater separation treatment and reuse system; The carbon emission assessment method for the industrial wastewater separation treatment and reuse system also includes: According to the formula and Calculate the carbon emissions E of reclaimed water 再生水 and carbon emission intensity E 再生水强度 ; where Q 再生水 This is the flow entering the recycling phase, Q. 排放 This refers to the amount of wastewater discharged to downstream centralized wastewater treatment plants.

2. The carbon emission assessment method for the industrial wastewater separation treatment and reuse system according to claim 1, characterized in that, The carbon emissions during the wastewater treatment stage are E 废水处理 The calculation formula is: AND 废水处理 =And 好氧 +E 厌氧 +E 废水处理，能源 +E 废水处理，药剂 E 废水处理，能源 =EF 能源 ·AD 废水处理，能源 E 废水处理，药剂 =EF 药剂 ·AD 废水处理，药剂 Among them, E 好氧 E represents the direct carbon emissions from aerobic biological reaction processes. 厌氧 E represents the direct carbon emissions from anaerobic biological reaction processes. 废水处理，能源 E represents the carbon emissions generated by the energy used in the wastewater treatment stage. 废水处理，药剂 This refers to the carbon emissions generated by the chemicals used in the wastewater treatment stage. and These are the direct carbon emission factors of CH4 and N2O from industrial wastewater treatment, and COD. 去除 and TN 去除 These represent the removal rates of COD and TN during the wastewater treatment stage, respectively, and EF. 能源 and AD 废水处理，能源 These are local energy lifecycle carbon emission factors and energy activity data during the wastewater treatment phase, respectively. 药剂 and AD 废水处理，药剂 These are the lifecycle carbon emission factors and dosages of the agents used in the wastewater treatment stage.

3. The carbon emission assessment method for the industrial wastewater separation treatment and reuse system according to claim 2, characterized in that, The carbon emissions E during the reclaimed water reuse stage 再生 The calculation formula is: AND 再生 =And 双膜法 +E 结晶法 +E 泵送 E 双膜法 =EF 能源 ·AD 双膜法，能源 +EF 药剂 ·AD 双膜法，药剂 E 结晶法 =EF 能源 ·AD 结晶法，能源 +EF 药剂 ·AD 结晶法，药剂 E 泵送 =EF 能源 ·AD 泵送，能源 Among them, E 双膜法 and E 结晶法 These represent the energy consumed and the carbon emissions generated by the reagents in the two-film method and the crystallization method, respectively. 泵送 This refers to the carbon emissions generated by the electricity consumed in pumping reclaimed water to the production stage. (AD) 双膜法，能源 The amount of energy consumed in the dual-membrane process, AD 双膜法，药剂 This refers to the dosage of drug added in the two-membrane method, AD 结晶法，能源 AD represents the amount of energy that can be consumed in the crystallization process. 结晶法，药剂 The dosage of the drug added during the crystallization process, AD 泵送，能源 The energy consumed in pumping reclaimed water to the production process.

4. The carbon emission assessment method for the industrial wastewater separation treatment and reuse system according to claim 3, characterized in that, E of carbon emissions during the sludge treatment stage 污泥 The calculation formula is E 污泥 =EF 能源 ·AD 污泥，能源 +EF 污泥 ·M 干 Among them, AD 污泥，能源 M is the energy consumed in the sludge treatment process within the plant. 干 This refers to the amount of dry sludge sent out.

5. The carbon emission assessment method for the industrial wastewater separation treatment and reuse system according to claim 4, characterized in that, The downstream discharge to the centralized urban wastewater treatment plant stage results in carbon emissions E. 污水厂 The calculation formula is: It is 污水厂 =EF 污水厂 ·CODE' 去除 Among them, COD' 去除 It is the amount of COD removed after industrial wastewater enters a municipal sewage treatment plant.

6. A carbon emission assessment system for an industrial wastewater separation treatment and reuse system, characterized in that, include: The process route classification module is used to classify process routes according to different wastewater discharge or reuse requirements; The process route includes pretreatment, biological treatment, advanced treatment, and recycling; The accounting boundary determination module is used to determine the accounting boundary of the industrial wastewater separation treatment and reuse system, and to determine the process route corresponding to each accounting boundary; the accounting boundary includes the wastewater treatment stage, the reclaimed water reuse stage, the sludge treatment stage, and the downstream discharge to the centralized municipal sewage treatment plant stage; wherein, the process route corresponding to the in-plant industrial wastewater treatment stage is pretreatment, biological treatment, and advanced treatment, and the process route corresponding to the reclaimed water reuse stage is regeneration and reuse; The model building module is used to establish a carbon accounting model for an industrial wastewater separation treatment and reuse system based on the process route corresponding to the accounting boundary and according to the organizational carbon emission accounting rules in the life cycle assessment method; the carbon accounting model for the industrial wastewater separation treatment and reuse system includes a total carbon emission calculation model and a total carbon emission intensity calculation model; The carbon emission assessment module is used to assess carbon emissions based on the carbon accounting model of the industrial wastewater separation treatment and reuse system. The expression for the total carbon emissions calculation model is as follows: E=E 废水处理 +E 再生 +E 污泥 +E 污水厂 The expression for the total carbon emission intensity calculation model is as follows: Where E represents the total carbon emissions, E 强度 E represents total carbon intensity. 废水处理 E represents carbon emissions during the wastewater treatment stage. 再生 E represents carbon emissions during the reclaimed water reuse phase. 污泥 E represents carbon emissions during the sludge treatment stage. 污水厂 Q represents the carbon emissions from downstream discharge to centralized municipal wastewater treatment plants. 总 The total flow rate entering the industrial wastewater separation treatment and reuse system; The carbon emission assessment system for the industrial wastewater separation treatment and reuse system also includes: The module for calculating carbon emissions and carbon intensity of reclaimed water is used to calculate carbon emissions based on the formula. and Calculate the carbon emissions E of reclaimed water 再生水 and carbon emission intensity E 再生水强度 ; where Q 再生水 This is the flow entering the recycling phase, Q. 排放 This refers to the amount of wastewater discharged to downstream centralized wastewater treatment plants.

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