Baijiu wastewater treatment carbon emission accounting method and system

Abstract

The invention discloses a white spirit wastewater treatment carbon emission accounting method and system, and relates to the technical field of carbon accounting. The method comprises the following steps: determining carbon accounting boundaries and accounting greenhouse gases in white spirit wastewater treatment, wherein the carbon accounting boundaries comprise sewage treatment, sludge treatment, effluent discharge and sludge transportation; acquiring activity data and emission factors in white spirit wastewater treatment based on the carbon accounting boundary, and constructing a carbon accounting model about greenhouse gas based on the activity data and the emission factors; and calculating the total carbon emission amount of white spirit wastewater treatment based on a carbon accounting model. According to the method, sewage treatment, sludge treatment, effluent discharge and sludge transportation are definitely brought into a carbon emission accounting boundary, and a refined carbon accounting model is constructed, so that systematic and quantitative evaluation of carbon emission in the whole process of white spirit wastewater treatment is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon accounting, and particularly relates to a liquor wastewater treatment carbon emission accounting method and system. BACKGROUND

[0002] Due to the fermentation process and brewing process, liquor produces a large amount of high-concentration organic wastewater in the production process, which not only has high pollutant load, but also has significant carbon emissions. Under this background, building a scientific and accurate carbon emission accounting system has become a key foundation for promoting liquor enterprises to achieve pollution reduction and carbon reduction synergies, and implementing the concept of clean production and circular economy.

[0003] At present, in the aspect of carbon emission management, the liquor industry generally refers to the carbon accounting guidelines for general industrial wastewater treatment, or roughly estimates the overall production link based on the life cycle assessment method. There is no special carbon emission accounting standard or refined model for the liquor wastewater treatment process. The existing accounting methods generally have the problems of insufficient applicability, unclear boundaries, etc., and it is difficult to accurately reflect the true carbon emission characteristics of each unit operation in the liquor wastewater treatment plant. SUMMARY

[0004] The first aspect of the present application provides a liquor wastewater treatment carbon emission accounting method, comprising the following steps: determining the carbon accounting boundary and the greenhouse gas to be accounted for in the liquor wastewater treatment, wherein the carbon accounting boundary includes sewage treatment, sludge treatment, effluent discharge and sludge transportation; obtaining activity data and emission factors in the liquor wastewater treatment based on the carbon accounting boundary, and constructing a carbon accounting model for greenhouse gases based on the activity data and the emission factors; calculating the total carbon emission of the liquor wastewater treatment based on the carbon accounting model.

[0005] In some optional embodiments of the first aspect of the present application, the calculation of the total carbon emission of the liquor wastewater treatment based on the carbon accounting model comprises: the carbon accounting model includes a methane emission carbon accounting model, a nitrous oxide emission carbon accounting model and a carbon dioxide emission carbon accounting model; calculating the methane emission carbon dioxide equivalent in the liquor wastewater treatment based on the methane emission carbon accounting model calculating the nitrous oxide emission carbon dioxide equivalent in the liquor wastewater treatment based on the nitrous oxide emission carbon accounting model calculating the carbon dioxide equivalent of directly emitted carbon dioxide in the liquor wastewater treatment based on the carbon dioxide emission carbon accounting model and the carbon dioxide equivalent of indirectly emitted carbon dioxide ; the total carbon emission of the liquor wastewater treatment The following calculation formula is used to obtain: .

[0006] In some optional embodiments of the first aspect of the application, the methane emission carbon accounting model comprises: ; ; In the formula, is the carbon dioxide equivalent of methane emission in the treatment of liquor wastewater, and the unit is ; is the global warming potential value; ; is the total amount of methane emission in the treatment of liquor wastewater, and the unit is ; is the total amount of methane emission in the treatment of wastewater, and the unit is ; is the total amount of methane emission in the process of discharging standard water from wastewater treatment to aquatic environment and in the process of using reclaimed water as ecological water supplement, and the unit is ; is the annual leakage amount of methane generated in the process of sludge anaerobic digestion and the process of using or burning biogas, and the unit is ; is the methane emission amount generated in the process of storing and treating various sludge generated in the wastewater treatment process, and the unit is .

[0007] In some optional embodiments of the first aspect of the application, the total amount of methane emission in the treatment of wastewater is calculated by the following formula: ; In the formula, is the amount of organic matter in the influent of the jth liquor wastewater treatment plant, and the unit is kg COD; is the amount of organic components removed in the form of sludge in the wastewater of the jth liquor wastewater treatment plant, and the unit is kg COD; j is the jth liquor wastewater treatment plant; is the methane emission factor of the jth liquor wastewater treatment plant, and the unit is ; is the recovery or combustion amount of the jth liquor wastewater treatment plant, and the unit is ; The amount of organic components removed in the form of sludge in the wastewater of the jth liquor wastewater treatment plant is calculated by the following formula: ; In the formula, The amount of sludge removed in dry matter form during wastewater treatment, expressed in kg. The sludge factor is expressed in kg COD / kg dry sludge. The total methane emissions from treated wastewater discharged into aquatic environments and from reclaimed water used as ecological replenishment are calculated using the following formula: ; In the formula, The organic matter content of the wastewater discharged from the jth liquor wastewater treatment plant is expressed in kg BOD. The discharged wastewater includes treated water and reclaimed water that enters the receiving water body or aquatic environment. The methane emission factor of the effluent from the jth liquor wastewater treatment plant is given in units of methane. ; The annual methane leakage rate generated during the anaerobic digestion of sludge and the utilization or fueling of biogas produced is calculated using the following formula: ; In the formula, The biogas production of the anaerobic digestion unit of the sludge in the jth liquor wastewater treatment plant is expressed in units of 10. 4 m 3 ; The percentage of methane content in the biogas from the anaerobic digestion unit of the sludge in the jth liquor wastewater treatment plant is given. The range is 50% to 70%; The methane leakage rate of the anaerobic digestion system of the jth liquor wastewater treatment plant; The methane emissions generated during the storage and on-site treatment of various types of sludge produced in the wastewater treatment process are calculated using the following formula: ; In the formula, The sludge yield after concentration and dewatering at the jth liquor wastewater treatment plant is expressed in kg. The moisture content of the sludge after concentration and dewatering at the jth liquor wastewater treatment plant. The range is 60% to 80%; The methane emission factor generated during the storage and treatment of sludge from the jth liquor wastewater treatment plant is given in units of [value missing]. Dry sludge.

[0008] In some optional embodiments of the first aspect of this application, the carbon accounting model for nitrous oxide emissions includes: ; ; In the formula, The global warming potential value is ; The global warming potential value is ; The global warming potential value is ; The global warming potential value is ; The global warming potential value is .

[0009] In some optional embodiments of the first aspect of the present application, the total emission of nitrous oxide directly diffused in the sewage treatment process is calculated using the following formula: ; In the formula, is the total nitrogen amount of the influent of the jth liquor wastewater treatment plant, in kg TN; j is the jth liquor wastewater treatment plant; is the nitrous oxide emission factor of the jth liquor wastewater treatment plant, in ; The total emission of nitrous oxide in the process of discharging standard water to the aquatic environment after sewage treatment and the process of using reclaimed water as ecological water supplement is calculated using the following formula: ; In the formula, is the total nitrogen amount of the effluent of the jth liquor wastewater treatment plant, in kg TN, including the treated effluent entering the receiving water body or aquatic environment and the reclaimed water; is the emission factor of the effluent of the jth liquor wastewater treatment plant, in .

[0010] In some optional embodiments of the first aspect of the present application, the carbon dioxide emission accounting model includes: ; ; ; In the formula, is the emission equivalent of carbon dioxide of the direct emission in the liquor wastewater treatment, in ; is the emission equivalent of carbon dioxide of the indirect emission in the liquor wastewater treatment, in ; for Global warming potential; For the treatment of liquor wastewater Total emissions, in units ; This represents the total amount of carbon dioxide emissions indirectly generated during the treatment of baijiu (Chinese liquor) wastewater, expressed in units of... ; This represents the total amount of carbon dioxide emissions indirectly caused by electricity consumption during the treatment of liquor wastewater, expressed in units of... ; This represents the total amount of carbon dioxide emissions indirectly caused by the consumption of chemical reagents in the treatment of liquor wastewater, expressed in units of... .

[0011] In some optional embodiments of the first aspect of this application, the treatment of liquor wastewater... Total emissions are calculated using the following formula: ; In the formula, For the treatment of liquor wastewater Total emissions, in units ; The annual consumption of the i-th fossil-derived external carbon source at the j-th liquor wastewater treatment plant is expressed in tons. For the i-th type of fossil source, the external carbon source Emission factor, in units .

[0012] In some optional embodiments of the first aspect of this application, the total amount of carbon dioxide emissions indirectly generated by electricity consumption in the treatment of liquor wastewater is calculated using the following formula: ; In the formula, Indirect electricity generated during the treatment of liquor wastewater Total emissions, in units ; The annual power consumption of the qth piece of equipment in the jth liquor wastewater treatment plant is expressed in kWh. For electricity The emission factor, in units of ; The total amount of carbon dioxide emissions indirectly caused by the consumption of chemical agents in the treatment of baijiu wastewater is calculated using the following formula: ; In the formula, The indirect emissions generated by the consumption of reagents for the wastewater treatment system The emissions are expressed in tons of CO2 equivalent ; is the annual consumption of the pth reagent for the jth liquor wastewater treatment plant, expressed in tons; is the emission factor of the pth reagent, expressed in tons of CO2 equivalent per ton of reagent; The emissions are expressed in tons of CO2 equivalent The emissions are expressed in tons of CO2 equivalent

[0013] The second aspect of the present application provides a liquor wastewater treatment carbon emission accounting system for implementing the above-mentioned liquor wastewater treatment carbon emission accounting method. The system comprises: A first module configured to determine the carbon accounting boundary in liquor wastewater treatment and the greenhouse gases to be accounted for; A second module configured to obtain activity data and emission factors in liquor wastewater treatment based on the carbon accounting boundary, and to construct a carbon accounting model for greenhouse gases based on the activity data and the emission factors; A third module configured to calculate the total carbon emissions of liquor wastewater treatment based on the carbon accounting model.

[0014] Advantages: The liquor wastewater treatment carbon emission accounting method provided by the present application clearly includes wastewater treatment, sludge treatment, effluent discharge, and sludge transportation into the carbon emission accounting boundary, and constructs a refined carbon accounting model for greenhouse gases, thereby realizing systematic and quantitative evaluation of the entire process of liquor wastewater treatment. Compared with the prior art, the method significantly improves the completeness and accuracy of carbon emission accounting, effectively solving the problems of fuzzy boundaries, rough factors, and incomplete coverage of gas types in traditional accounting. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a carbon accounting method flowchart in an embodiment of the present application; Figure 2 is a wastewater treatment plant carbon accounting boundary schematic diagram in an embodiment of the present application. DETAILED DESCRIPTION

[0016] The present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0017] In one embodiment, a liquor wastewater treatment carbon emission accounting method is provided, as shown in Figure 1 The method comprises the following steps: determining the carbon accounting boundary in liquor wastewater treatment and the greenhouse gases to be accounted for, wherein the carbon accounting boundary includes wastewater treatment, sludge treatment, effluent discharge, and sludge transportation; Activity data and emission factors in the liquor treatment are obtained based on the carbon accounting boundary, and a carbon accounting model for greenhouse gases is constructed based on the activity data and the emission factors; The total carbon emission of the liquor wastewater treatment is calculated based on the carbon accounting model.

[0018] In this embodiment, the liquor wastewater treatment plant is used to treat high-concentration organic wastewater generated in the liquor production process. The liquor wastewater treatment plant mainly includes a sewage treatment system, a sludge treatment system, sludge transportation, and effluent discharge. The sewage treatment system includes a pretreatment unit, an anaerobic biological treatment unit, an aerobic biological treatment unit, and a deep treatment unit. The pretreatment unit realizes the preliminary treatment of wastewater through physical, chemical, and physicochemical means, reducing the load of the biochemical treatment system; the anaerobic biological treatment unit is the main part for removing organic matter in wastewater, which is efficiently degraded under the action of anaerobic microorganisms and produces biogas; the aerobic biological treatment unit is the main part for removing organic matter, nitrogen, and phosphorus, which degrades pollutants through the metabolism of aerobic microorganisms and is usually composed of an aeration tank with anaerobic, anoxic, and aerobic zones, a secondary sedimentation tank, an aeration system and a reflux system, an MBR tank, etc.; the deep treatment unit further removes pollutants in wastewater by using physicochemical, biochemical, and membrane filtration techniques to meet the discharge and reclaimed water requirements. The anaerobic state and nitrogen transformation process exist in different treatment stages, thereby directly producing greenhouse gases such as methane, nitrous oxide, and carbon dioxide.

[0019] The normal operation of the sewage treatment system requires the cooperation of many mechanical devices such as lifting and reflux pumps, mixing and stirring equipment, aeration and oxygenation equipment, and other special equipment, and the operation of the equipment consumes electricity and indirectly emits carbon dioxide. At the same time, the sewage treatment process requires the addition of various chemical agents such as coagulants, external carbon sources, phosphorus removal agents, and disinfectants, which also produce indirect emissions of carbon dioxide.

[0020] The carbon emission accounting boundary in the liquor wastewater treatment in this embodiment includes sewage treatment, sludge treatment, effluent discharge, and sludge transportation in the liquor wastewater treatment plant. As shown in the following table, it specifically includes the following parts: Figure 2 (1) Sewage treatment: greenhouse gas emissions mainly include methane (from organic matter decomposition and escape in the pretreatment / anaerobic unit), carbon dioxide (indirectly emitted through power consumption in chemical treatment, aeration in the aerobic and deep treatment units, chemical production, and ozone equipment operation), and nitrous oxide (derived from the nitrogen transformation process in the denitrification process), which needs to be focused on the sealing of the anaerobic reactor and the control of the denitrification process.

[0021] ​(2) Sludge treatment: the main emissions are methane (anaerobic fermentation of sludge concentration / dewatering stage) and carbon dioxide (direct emissions of fossil fuel-based drying heat energy, and indirect emissions of equipment power consumption). Incomplete biogas recovery will exacerbate methane emissions.

[0022] (3) Sludge transportation: the main emissions are carbon dioxide (direct emissions of fuel consumption of transportation vehicles or indirect emissions of electric power driving). The transportation distance and load directly affect the emission intensity. Unstabilized sludge may release a small amount of methane during transportation.

[0023] (4) Effluent discharge and reuse: the residual organic matter in the effluent slowly releases methane in the anaerobic environment of the receiving water body, and nitrogen compounds may generate nitrous oxide during conversion. Indirect carbon dioxide emissions are generated at the effluent pumping station and advanced treatment.

[0024] When carrying out carbon emission accounting of liquor wastewater treatment plants, the following key operation and emission data (i.e. activity data) need to be collected: total organic matter in the influent (measured by COD or BOD), residual organic matter in the effluent, amount of organic components removed in the form of sludge, total dry sludge production, sludge production after concentration and dewatering, and water content; annual biogas production of the sludge anaerobic digestion unit, methane content in the biogas, methane recovery amount or flare combustion amount; total nitrogen load in the influent; annual consumption of various fossil sources of additional carbon sources; annual power consumption of various main equipment (such as air blower, water pump, etc.); and annual usage of various chemicals (such as PAC, PAM, etc.). The above data are derived from daily operation records, online monitoring systems, energy and material accounts, sludge management logs, and environmental monitoring reports.

[0025] The emission factors involved in the accounting include: the methane emission factor of the liquor wastewater treatment plant as a whole, the sludge production rate factor, the methane emission factor of the residual organic matter in the treated effluent, the methane emission factor generated during the storage and treatment of sludge in the plant, the total nitrogen (TN) concentration of the effluent (used for calculating nitrous oxide emissions), and the nitrous oxide emission factor related to the effluent. The above emission factors can be based on the “2006 IPCC National Greenhouse Gas Inventory Guidelines”, the industry accounting methods published by the national or local ecological environmental departments, the authoritative databases, or combined with the measured data of the enterprise to make local corrections to ensure the scientificity and accuracy of the carbon accounting.

[0026] In some optional embodiments of the present application, the total carbon emission of liquor wastewater treatment calculated based on the carbon accounting model includes: The carbon accounting model includes a methane emission carbon accounting model, a nitrous oxide emission carbon accounting model, and a carbon dioxide emission carbon accounting model; The methane emission carbon dioxide equivalent in liquor wastewater treatment is calculated based on the methane emission carbon accounting model The carbon dioxide equivalent of nitrous oxide emissions from the treatment of liquor wastewater was calculated based on the nitrous oxide emission carbon accounting model. The carbon dioxide equivalent of direct carbon dioxide emissions from the treatment of liquor wastewater was calculated based on the carbon dioxide emission carbon accounting model. Carbon dioxide equivalent of indirect carbon dioxide emissions ; Total carbon emissions from baijiu wastewater treatment The following calculation formula is used to obtain: .

[0027] In some optional embodiments of this application, the methane emission carbon accounting model includes: ; ; In the formula, The carbon dioxide equivalent of methane emissions from the treatment of liquor wastewater is given in units of [unit missing]. ; for Global warming potential; This represents the total methane emissions from the treatment of liquor wastewater, expressed in units of... ; This represents the total amount of methane emitted during wastewater treatment, expressed in units of... ; The total methane emissions are calculated as follows: treated wastewater discharged into aquatic environments and reclaimed water used as ecological replenishment. The unit is [unit missing]. ; This refers to the annual methane leakage generated during the anaerobic digestion of sludge and the utilization or fueling of the biogas produced, expressed in units of... ; This refers to the methane emissions generated during the storage and on-site treatment of various types of sludge produced in the wastewater treatment process, expressed in units of... .

[0028] In some optional embodiments of this application, the total amount of methane emitted during wastewater treatment is calculated using the following formula: ; In the formula, The organic matter content of the influent to the j-th liquor wastewater treatment plant is expressed in kg COD. The amount of organic components removed in the form of sludge from the wastewater of the j-th liquor wastewater treatment plant is expressed in kgCOD; j represents each j-th liquor wastewater treatment plant. The methane emission factor of the jth liquor wastewater treatment plant is given in units of methane. ; For the jth liquor wastewater treatment plant Recovery or combustion volume, in units of In this embodiment The value is 0.041.

[0029] It should be noted that in this embodiment, the value of j in the summation formula ranges from 1 to n, where n is the total amount of liquor wastewater treated.

[0030] The amount of organic components removed in the form of sludge from the wastewater of the jth liquor wastewater treatment plant is calculated using the following formula: ; In the formula, The amount of sludge removed in dry matter form during wastewater treatment, expressed in kg. The sludge factor is expressed in kg COD / kg dry sludge. The value is 0.764.

[0031] The total methane emissions from treated wastewater discharged into aquatic environments and from reclaimed water used as ecological replenishment are calculated using the following formula: ; In the formula, The organic matter content of the wastewater discharged from the jth liquor wastewater treatment plant is expressed in kg BOD. The discharged wastewater includes treated water and reclaimed water that enters the receiving water body or aquatic environment. The methane emission factor of the effluent from the jth liquor wastewater treatment plant is given in units of methane. ; The value is 0.028.

[0032] The annual methane leakage rate generated during the anaerobic digestion of sludge and the utilization or fueling of biogas produced is calculated using the following formula: ; In the formula, The biogas production of the anaerobic digestion unit of the sludge in the jth liquor wastewater treatment plant is expressed in units of 10. 4 m 3 ; The percentage of methane in the biogas from the anaerobic digestion unit of the sludge in the j-th liquor wastewater treatment plant is given. The range is 50% to 70%; denoted as , where is the methane leakage rate of the anaerobic digestion system in the j-th liquor wastewater treatment plant; 0.714 is the conversion factor between methane volume and mass, in units of . ; The methane emissions generated during the storage and on-site treatment of various types of sludge produced in the wastewater treatment process are calculated using the following formula: ; wherein, is the sludge yield of the jth liquor wastewater treatment plant after concentration and dewatering, in kg; is the moisture content of the sludge of the jth liquor wastewater treatment plant after concentration and dewatering, ranging from 60% to 80%; is the methane emission factor of the sludge of the jth liquor wastewater treatment plant during the process of storage and treatment in the plant, in kg CH4 / kg TS; . The value is 5.

[0033] In some optional embodiments of the present application, the nitrous oxide emission carbon accounting model comprises: ; ; wherein, is the carbon dioxide equivalent of the nitrous oxide emission in liquor wastewater treatment, in kg CO2-eq / kg N2O; ; is the global warming potential value; is the total amount of nitrous oxide emission in liquor wastewater treatment, in kg N2O; ; is the total amount of directly dispersed nitrous oxide emission in the process of wastewater treatment, in kg N2O; ; is the total amount of nitrous oxide emission in the process of discharging treated water to aquatic environment and using reclaimed water as ecological water supplement, in kg N2O. In some optional embodiments of the present application, the total amount of directly dispersed nitrous oxide emission in the process of wastewater treatment is calculated by the following formula:

[0034] In some optional embodiments of the present application, the total amount of directly dispersed nitrous oxide emission in the process of wastewater treatment is calculated by the following formula: ; wherein, is the total nitrogen amount of the influent of the jth liquor wastewater treatment plant, in kg TN; j is the jth liquor wastewater treatment plant; is the nitrous oxide emission factor of the jth liquor wastewater treatment plant, in kg N2O / kg TN; ; is the conversion coefficient of N and ; The value is 0.005.

[0035] The total amount of nitrous oxide emission in the process of discharging treated water to aquatic environment and using reclaimed water as ecological water supplement is calculated by the following formula: ; ​In the formula, is the total nitrogen amount of the effluent water of the jth liquor wastewater treatment plant, in kg TN, and the effluent water includes the treated effluent water and the reclaimed water entering the receiving water body or water environment; is the total nitrogen amount of the effluent water of the jth liquor wastewater treatment plant, in kg TN, and the effluent water includes the treated effluent water and the reclaimed water entering the receiving water body or water environment; is the emission factor, in ; is the conversion coefficient of N and . The value is 0.005.

[0036] In some optional embodiments of the present application, the carbon accounting model of carbon dioxide emission includes: ; ; ; In the formula, is the emission equivalent of carbon dioxide of the direct emission in the liquor wastewater treatment, in ; is the emission equivalent of carbon dioxide of the indirect emission in the liquor wastewater treatment, in ; is the global warming potential value of ; is the total emission amount of in the liquor wastewater treatment, in ;

[0037] is the total emission amount of the indirect emission of carbon dioxide in the liquor wastewater treatment, in ; is the total emission amount of the indirect emission of carbon dioxide due to the power consumption in the liquor wastewater treatment, in ; is the total emission amount of the indirect emission of carbon dioxide due to the chemical agent consumption in the liquor wastewater treatment, in .

[0038] In some optional embodiments of the present application, the total emission amount of in the liquor wastewater treatment is calculated by using the following formula: ; In the formula, is the total emission amount of in the liquor wastewater treatment, in ; The annual consumption of the i-th fossil-derived external carbon source at the j-th liquor wastewater treatment plant is expressed in tons. For the i-th type of fossil source, the external carbon source Emission factor, in units Among them, carbon sources outside fossil sources refer to carbon-containing substances obtained outside the carbon accounting boundary in the treatment of liquor wastewater, which originate from fossil fuels (such as coal, oil, natural gas, etc.).

[0039] In some optional embodiments of this application, the total amount of carbon dioxide emissions indirectly caused by electricity consumption in the treatment of liquor wastewater is calculated using the following formula: ; In the formula, Indirect electricity generated during the treatment of liquor wastewater Total emissions, in units ; The annual power consumption of the qth piece of equipment in the jth liquor wastewater treatment plant is expressed in kWh. For electricity The emission factor, in units of ; The value is 0.4989.

[0040] The total amount of carbon dioxide emissions indirectly caused by the consumption of chemical agents in the treatment of baijiu wastewater is calculated using the following formula: ; In the formula, Indirect costs incurred from the consumption of chemicals in wastewater treatment systems Emissions, in units ; The annual consumption of the p-th reagent at the j-th liquor wastewater treatment plant is expressed in tons. For the p-th drug Emission factor, in units The reagent; p is the p-th reagent; j is the j-th liquor wastewater treatment plant.

[0041] In another embodiment, a carbon emission accounting system for liquor wastewater treatment is provided to implement the above-described carbon emission accounting method for liquor wastewater treatment. The system includes: The first module is configured to determine the carbon accounting boundary and the greenhouse gases accounted for in the treatment of liquor wastewater. The second module is configured to obtain activity data and emission factors in the treatment of liquor wastewater based on the carbon accounting boundary, and to construct a carbon accounting model for greenhouse gases based on the activity data and emission factors. The third module is configured to calculate the total carbon emissions from the treatment of liquor wastewater based on a carbon accounting model.

[0042] While the preferred embodiments in the application have been described, additional modifications and changes can occur to those skilled in the art once they learn of the basic creative principles contained herein. Therefore, the above disclosure is intended to be taken as illustrative only and not as limiting the scope of the application. The appended claims are intended to cover all modifications and changes as fall within the true scope and spirit of the application.

[0043] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A method for calculating carbon emissions from liquor wastewater treatment, characterized in that, Includes the following steps: Determine the carbon accounting boundary and the greenhouse gases to be accounted for in the treatment of liquor wastewater. The carbon accounting boundary includes wastewater treatment, sludge treatment, effluent discharge and sludge transportation. Based on the carbon accounting boundary, activity data and emission factors in the treatment of liquor wastewater are obtained, and a carbon accounting model for the greenhouse gas is constructed based on the activity data and the emission factors. The total carbon emissions from the treatment of the liquor wastewater were calculated based on the carbon accounting model.

2. The carbon emission accounting method for liquor wastewater treatment as described in claim 1, characterized in that, The total carbon emissions from the treatment of the liquor wastewater, calculated based on the carbon accounting model, include: The carbon accounting models include a methane emission carbon accounting model, a nitrous oxide emission carbon accounting model, and a carbon dioxide emission carbon accounting model; The carbon dioxide equivalent of methane emissions from the treatment of liquor wastewater was calculated based on the aforementioned methane emission carbon accounting model. The carbon dioxide equivalent of nitrous oxide emissions from the treatment of liquor wastewater was calculated based on the aforementioned nitrous oxide emission carbon accounting model. Based on the carbon dioxide emission carbon accounting model, the carbon dioxide equivalent of direct carbon dioxide emissions from the treatment of liquor wastewater was calculated. Carbon dioxide equivalent of indirect carbon dioxide emissions ; The total carbon emissions from the treatment of liquor wastewater The following calculation formula is used to obtain: 。 3. The carbon emission accounting method for liquor wastewater treatment as described in claim 2, characterized in that, The methane emission carbon accounting model includes: ； ； In the formula, The carbon dioxide equivalent of methane emissions from the treatment of liquor wastewater is given in units of [unit missing]. ; for Global warming potential; This represents the total methane emissions from the treatment of liquor wastewater, expressed in units of... ; This represents the total amount of methane emitted during wastewater treatment, expressed in units of... ; The total methane emissions are calculated as follows: treated wastewater discharged into aquatic environments and reclaimed water used as ecological replenishment. The unit is [unit missing]. ; This refers to the annual methane leakage generated during the anaerobic digestion of sludge and the utilization or fueling of the biogas produced, expressed in units of... ; This refers to the methane emissions generated during the storage and on-site treatment of various types of sludge produced in the wastewater treatment process, expressed in units of... .

4. The carbon emission accounting method for liquor wastewater treatment as described in claim 3, characterized in that, The total amount of methane emitted during the wastewater treatment process is calculated using the following formula: ； In the formula, For the first Organic matter content in the influent of the liquor wastewater treatment plant, in units of ; For the first The amount of organic components removed in the form of sludge from the wastewater of a liquor wastewater treatment plant, in units of... ; For the first A liquor wastewater treatment plant; The methane emission factor of the jth liquor wastewater treatment plant is given in units of methane. ; For the first A liquor wastewater treatment plant Recovery or combustion volume, in units of ; The amount of organic components removed in the form of sludge from the wastewater of the jth liquor wastewater treatment plant is calculated using the following formula: ； In the formula, The amount of sludge removed in dry matter form during wastewater treatment, expressed in kg. The sludge factor is expressed in kg COD / kg dry sludge. The total methane emissions from the treated wastewater discharged into the aquatic environment and from the reclaimed water used as ecological replenishment are calculated using the following formula: ； In the formula, For the first The organic matter content of the wastewater discharged from the liquor wastewater treatment plant is expressed in kg BOD. The discharged water includes treated water and reclaimed water that enters the receiving water body or aquatic environment. For the first The methane emission factor in the effluent from the wastewater treatment plant for liquor production, in units of ; The annual methane leakage rate generated during the anaerobic digestion of sludge and the utilization or fueling of biogas produced is calculated using the following formula: ； In the formula, The biogas production of the anaerobic digestion unit of the sludge in the jth liquor wastewater treatment plant is expressed in units of 10. 4 m 3 ; The percentage of methane content in the biogas from the anaerobic digestion unit of the sludge in the jth liquor wastewater treatment plant is given. The range is 50% to 70%; The methane leakage rate of the anaerobic digestion system of the jth liquor wastewater treatment plant; The methane emissions generated during the storage and on-site treatment of various types of sludge produced in the wastewater treatment process are calculated using the following formula: ； In the formula, The sludge yield after concentration and dewatering at the jth liquor wastewater treatment plant is expressed in kg. The moisture content of the sludge after concentration and dewatering at the jth liquor wastewater treatment plant. The range is 60% to 80%; The methane emission factor generated during the storage and treatment of sludge from the jth liquor wastewater treatment plant is given in units of [value missing]. Dry sludge.

5. The carbon emission accounting method for liquor wastewater treatment as described in claim 2, characterized in that, The carbon accounting model for nitrous oxide emissions includes: ； ； In the formula, The carbon dioxide equivalent of nitrous oxide emissions from baijiu wastewater treatment, in units of... ; for Global warming potential; This represents the total nitrous oxide emissions from the treatment of liquor wastewater, expressed in units of... ; This represents the total amount of nitrous oxide directly emitted during wastewater treatment, expressed in units of... ; This refers to the total nitrous oxide emissions from treated wastewater discharged into aquatic environments and from reclaimed water used as ecological replenishment, expressed in units of [unit missing]. .

6. The carbon emission accounting method for liquor wastewater treatment as described in claim 5, characterized in that, The total amount of nitrous oxide directly emitted during the wastewater treatment process is calculated using the following formula: ； In the formula, The total nitrogen content in the influent of the j-th liquor wastewater treatment plant is expressed in kg TN; j represents the j-th liquor wastewater treatment plant. The nitrous oxide emission factor of the jth liquor wastewater treatment plant is given in units of . ; The total amount of nitrous oxide emissions from the discharge of treated wastewater into the aquatic environment and from the use of reclaimed water as ecological replenishment is calculated using the following formula: ； In the formula, The total nitrogen content of the wastewater discharged from the jth liquor wastewater treatment plant is expressed in kg TN. The discharged water includes treated water and reclaimed water that enters the receiving water body or aquatic environment. For the wastewater discharged from the jth liquor wastewater treatment plant Emission factor, in units .

7. The carbon emission accounting method for liquor wastewater treatment as described in claim 2, characterized in that, The carbon accounting model for carbon dioxide emissions includes: ； ； ； In the formula, Direct discharge in the treatment of liquor wastewater CO2 emissions, in units of ; Indirect discharge in the treatment of liquor wastewater CO2 emissions, in units of ; for Global warming potential; For the treatment of liquor wastewater Total emissions, in units ; This represents the total amount of carbon dioxide emissions indirectly generated during the treatment of baijiu (Chinese liquor) wastewater, expressed in units of... ; This represents the total amount of carbon dioxide emissions indirectly caused by electricity consumption during the treatment of liquor wastewater, expressed in units of... ; This represents the total amount of carbon dioxide emissions indirectly caused by the consumption of chemical reagents in the treatment of liquor wastewater, expressed in units of... .

8. The carbon emission accounting method for liquor wastewater treatment as described in claim 7, characterized in that, The treatment of liquor wastewater Total emissions are calculated using the following formula: ； In the formula, For the treatment of liquor wastewater Total emissions, in units ; The annual consumption of the i-th fossil-derived external carbon source at the j-th liquor wastewater treatment plant is expressed in tons. For the i-th type of fossil source, the external carbon source Emission factor, in units .

9. The carbon emission accounting method for liquor wastewater treatment as described in claim 7, characterized in that, The total amount of carbon dioxide emissions indirectly caused by electricity consumption in the treatment of liquor wastewater is calculated using the following formula: ； In the formula, Indirect electricity generated during the treatment of liquor wastewater Total emissions, in units ; The annual power consumption of the qth piece of equipment in the jth liquor wastewater treatment plant is expressed in kWh. For electricity The emission factor, in units of ; The total amount of carbon dioxide emissions indirectly generated by the consumption of chemical agents in the treatment of liquor wastewater is obtained using the following formula: ； In the formula, Indirect costs incurred from the consumption of chemicals in wastewater treatment systems Emissions, in units ; The annual consumption of the p-th reagent at the j-th liquor wastewater treatment plant is expressed in tons. For the p-th drug Emission factor, in units The reagent; p is the p-th reagent; j is the j-th liquor wastewater treatment plant.

10. A carbon emission accounting system for liquor wastewater treatment, characterized in that, The system is used to implement the carbon emission accounting method for liquor wastewater treatment as described in any one of claims 1 to 9, the system comprising: The first module is configured to determine the carbon accounting boundary and the greenhouse gases accounted for in the treatment of liquor wastewater. The second module is configured to obtain activity data and emission factors in the treatment of liquor wastewater based on the carbon accounting boundary, and to construct a carbon accounting model for the greenhouse gas based on the activity data and the emission factors. The third module is configured to calculate the total carbon emissions from the treatment of the liquor wastewater based on the carbon accounting model.

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