CN114239230A - Method for constructing carbon emission evaluation index system of sewage treatment plant - Google Patents
Method for constructing carbon emission evaluation index system of sewage treatment plant Download PDFInfo
- Publication number
- CN114239230A CN114239230A CN202111407904.2A CN202111407904A CN114239230A CN 114239230 A CN114239230 A CN 114239230A CN 202111407904 A CN202111407904 A CN 202111407904A CN 114239230 A CN114239230 A CN 114239230A
- Authority
- CN
- China
- Prior art keywords
- carbon emission
- treatment plant
- sewage treatment
- carbon
- index
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 153
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 150
- 239000010865 sewage Substances 0.000 title claims abstract description 100
- 238000011156 evaluation Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000008569 process Effects 0.000 claims abstract description 27
- 238000010276 construction Methods 0.000 claims abstract description 10
- 238000010606 normalization Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 239000003344 environmental pollutant Substances 0.000 claims description 27
- 231100000719 pollutant Toxicity 0.000 claims description 27
- 239000010802 sludge Substances 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 18
- 229910052698 phosphorus Inorganic materials 0.000 claims description 18
- 239000011574 phosphorus Substances 0.000 claims description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- 239000001301 oxygen Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- 230000009467 reduction Effects 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 238000010248 power generation Methods 0.000 claims description 9
- 239000002351 wastewater Substances 0.000 claims description 9
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 238000004065 wastewater treatment Methods 0.000 claims description 7
- 238000011069 regeneration method Methods 0.000 claims description 5
- 230000008929 regeneration Effects 0.000 claims description 4
- 230000009919 sequestration Effects 0.000 claims description 3
- 241000196324 Embryophyta Species 0.000 description 34
- 238000005265 energy consumption Methods 0.000 description 12
- 239000005431 greenhouse gas Substances 0.000 description 9
- 238000004064 recycling Methods 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 241000195493 Cryptophyta Species 0.000 description 2
- 241001464837 Viridiplantae Species 0.000 description 2
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000004332 deodorization Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 244000292211 Canna coccinea Species 0.000 description 1
- 235000005273 Canna coccinea Nutrition 0.000 description 1
- 241000252229 Carassius auratus Species 0.000 description 1
- 241000196240 Characeae Species 0.000 description 1
- 241000234643 Festuca arundinacea Species 0.000 description 1
- 241000245654 Gladiolus Species 0.000 description 1
- 241000756137 Hemerocallis Species 0.000 description 1
- 241000827798 Hemerocallis citrina Species 0.000 description 1
- 244000307609 Mangifera caesia Species 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 244000248557 Ophiopogon japonicus Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 241000209049 Poa pratensis Species 0.000 description 1
- JXBAVRIYDKLCOE-UHFFFAOYSA-N [C].[P] Chemical compound [C].[P] JXBAVRIYDKLCOE-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000081 body of the sternum Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000013440 design planning Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- GUOONOJYWQOJJP-DCMFLLSESA-N n-[(2s,3r)-3-hydroxy-1-phenyl-4-[[3-(trifluoromethoxy)phenyl]methylamino]butan-2-yl]-3-[methyl(methylsulfonyl)amino]-5-[(2r)-2-(4-methyl-1,3-thiazol-2-yl)pyrrolidine-1-carbonyl]benzamide Chemical compound C1([C@H]2CCCN2C(=O)C=2C=C(C=C(C=2)N(C)S(C)(=O)=O)C(=O)N[C@@H](CC=2C=CC=CC=2)[C@H](O)CNCC=2C=C(OC(F)(F)F)C=CC=2)=NC(C)=CS1 GUOONOJYWQOJJP-DCMFLLSESA-N 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1806—Biological oxygen demand [BOD] or chemical oxygen demand [COD]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
- G06Q10/06393—Score-carding, benchmarking or key performance indicator [KPI] analysis
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/02—Reliability analysis or reliability optimisation; Failure analysis, e.g. worst case scenario performance, failure mode and effects analysis [FMEA]
Landscapes
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Human Resources & Organizations (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Entrepreneurship & Innovation (AREA)
- Economics (AREA)
- Chemical & Material Sciences (AREA)
- Educational Administration (AREA)
- Strategic Management (AREA)
- Development Economics (AREA)
- Medicinal Chemistry (AREA)
- Marketing (AREA)
- Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Molecular Biology (AREA)
- Emergency Medicine (AREA)
- Game Theory and Decision Science (AREA)
- Biomedical Technology (AREA)
- Immunology (AREA)
- Operations Research (AREA)
- Quality & Reliability (AREA)
- Tourism & Hospitality (AREA)
- General Business, Economics & Management (AREA)
- Biodiversity & Conservation Biology (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a method for constructing a carbon emission evaluation index system of a sewage treatment plant, which comprises the following steps: s1, constructing a carbon emission index system framework of the sewage treatment plant, and dividing a hierarchical structure by adopting an analytic hierarchy process, wherein the hierarchical structure comprises layers and element indexes contained in each layer; s2, determining the weight of each layer and each element index according to the relative importance of each layer and each element index on the carbon emission, and grading the value of each element index; s3, collecting operation data of the sewage treatment plant, calculating index values of each element, and determining grading values of the index of each element; s4, constructing a variable-weight carbon emission comprehensive evaluation index meeting the normalization, and completing the construction of a dynamic sewage treatment plant carbon emission comprehensive evaluation index system; and S5, evaluating the carbon emission level of the sewage treatment plant by using the obtained comprehensive evaluation index of the carbon emission. The method is suitable for evaluating the carbon emission level of the sewage treatment plant, and has the advantages of dynamic evaluation, accurate evaluation and the like.
Description
Technical Field
The invention relates to the technical field of biological wastewater treatment, in particular to a method for constructing a carbon emission evaluation index system of a sewage treatment plant.
Background
Reducing carbon emission is an important task for ecological civilization construction and sustainable development. The sewage treatment industry plays a decisive role in controlling water pollution, but is also an important carbon emission source. At present, the trends of 'high-quality effluent based on high energy consumption and high material consumption' and 'water pollutant and greenhouse gas emission reduction' caused by the high-quality effluent are increased year by year. It is roughly estimated that the greenhouse gas emission in 2030 s in the whole sewage treatment industry in China will reach 2.95% of the national greenhouse gas emission. The potential of a sewage treatment plant is exploited to reduce energy consumption and material consumption, improve the resource utilization level of sewage and sludge, and reduce the emission of greenhouse gases such as carbon dioxide and the like while reducing the emission of sewage pollutants by combining the application of ecological treatment processes such as carbon sink and the like, so that the method is a necessary direction for sustainable development of the sewage treatment industry.
The traditional carbon emission evaluation work of the sewage treatment plant is only single evaluation from a certain single level, but due to the internal complexity of the sewage treatment plant, a single evaluation index is not enough to comprehensively and accurately evaluate the carbon emission level of the whole plant area. At present, a scientific and reasonable construction method of a carbon emission evaluation index system of a sewage treatment plant is lacked, and the method is used for dynamically and accurately evaluating the carbon emission level of the sewage treatment plant.
Disclosure of Invention
The invention aims to provide a method for constructing a carbon emission evaluation index system of a sewage treatment plant, which is used for dynamically and accurately evaluating the carbon emission level of the sewage treatment plant.
In order to achieve the above object, the present invention provides a method for constructing a carbon emission evaluation index system of a sewage treatment plant, comprising:
s1, constructing a carbon emission index system framework of the sewage treatment plant, and dividing a hierarchical structure by adopting an analytic hierarchy process, wherein the hierarchical structure comprises layers and element indexes contained in each layer;
s2, determining the weight of each layer and each element index according to the relative importance of each layer and each element index on the carbon emission, and grading the value of each element index;
s3, collecting operation data of the sewage treatment plant, calculating index values of each element, and determining grading values of the index of each element;
s4, constructing a variable-weight carbon emission comprehensive evaluation index meeting the normalization, and completing the construction of a dynamic sewage treatment plant carbon emission comprehensive evaluation index system;
and S5, evaluating the carbon emission level of the sewage treatment plant by using the obtained comprehensive evaluation index of the carbon emission.
Further, the levels include an energy consumption and material consumption level, a resource reuse level, a carbon sink level and a carbon emission level.
Further, the energy consumption and material consumption level comprises unit sewage power consumption, unit oxygen pollutant power consumption, unit total nitrogen carbon source consumption reduction, unit total phosphorus removal agent consumption reduction and unit dry sludge consumption.
Further, the resource recycling level comprises a recycled water utilization rate, a sludge resource energy self-sufficiency rate, a solar photovoltaic power generation energy self-sufficiency rate, a water source heat pump energy self-sufficiency rate and other energy self-sufficiency rates.
Further, the carbon sink level comprises the green space rate of the plant area and the plant carbon fixation amount of the ecological treatment process.
Further, the level of carbon emissions includes carbon emissions per unit of wastewater and carbon emissions per unit of pollutants.
Further, the calculation formula of the carbon emission per unit pollutant is as follows:
wherein F42Carbon emission per pollutant, kgCO2eq/kg;F41kgCO is the carbon emission per unit of wastewater2eq/m3Calculating according to the technical guideline for the coordinated control of greenhouse gas accounting for pollutant removal in the urban sewage treatment plant (trial); qdaiIs the daily treatment capacity of a sewage treatment plant, m3/d;CODraiThe chemical oxygen demand of the inlet water is the daily average concentration, mg/L; CODeaiThe chemical oxygen demand daily average concentration of effluent is mg/L; BODraiThe biochemical oxygen demand daily average concentration is mg/L in five days of water inflow; BODeaiThe biochemical oxygen demand daily average concentration of effluent five days is mg/L; NH (NH)4 +-NraiThe daily average concentration of the ammonia nitrogen in the inlet water is mg/L; NH (NH)4 +-NeaiThe daily average concentration of the ammonia nitrogen in the effluent is mg/L; TN (twisted nematic)raiThe total nitrogen daily average concentration of the inlet water is mg/L; TN (twisted nematic)eaiThe total nitrogen daily average concentration of effluent is mg/L; TPraiThe daily average concentration of total phosphorus in the feed water is mg/L; TPeaiThe total phosphorus daily average concentration of the effluent is mg/L.
Further, the calculation formula of the variable weight carbon emission comprehensive evaluation index meeting the normalization is as follows:
wherein F is a comprehensive evaluation index of carbon emission, lambdaiIs the weight of the ith layer, gammaiWeight of the j-th element index, Fi,j is the grading value of each element index.
Compared with the prior art, the invention has the following technical effects: aiming at the construction of the carbon emission index system of the sewage treatment plant, the invention starts from four levels of energy consumption and material consumption level, resource reuse level, carbon sink level and carbon emission level, screens and extracts element indexes capable of reflecting the universal adaptability of the relevant level characteristics according to the basic characteristics of each level, constructs the carbon emission comprehensive evaluation index system of the sewage treatment plant, introduces the variable weight concept, and realizes the dynamic evaluation and the accurate evaluation of the carbon emission level of the sewage treatment plant.
Drawings
FIG. 1 is a schematic flow chart of a method for constructing a carbon emission evaluation index system of a sewage treatment plant according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention discloses a method for constructing a carbon emission evaluation index system of a sewage treatment plant, which comprises the following steps of S1 to S5:
s1, constructing a carbon emission index system framework of the sewage treatment plant, and dividing a hierarchical structure by adopting an analytic hierarchy process, wherein the hierarchical structure comprises layers and element indexes contained in each layer;
further, the levels include an energy consumption and material consumption level, a resource reuse level, a carbon sink level and a carbon emission level.
Further, the energy consumption and material consumption level comprises unit sewage power consumption, unit oxygen pollutant power consumption, unit total nitrogen carbon source consumption reduction, unit total phosphorus removal agent consumption reduction and unit dry sludge consumption.
Further, the resource recycling level comprises a recycled water utilization rate, a sludge resource energy self-sufficiency rate, a solar photovoltaic power generation energy self-sufficiency rate, a water source heat pump energy self-sufficiency rate and other energy self-sufficiency rates.
Further, the carbon sink level comprises the green space rate of the plant area and the plant carbon fixation amount of the ecological treatment process.
Further, the level of carbon emissions includes carbon emissions per unit of wastewater and carbon emissions per unit of pollutants.
The framework of the carbon emission evaluation index system of the sewage treatment plant constructed according to the step of S1 is shown in table 1.
TABLE 1 evaluation index system framework for carbon emission of sewage treatment plant
S2, determining the weight of each layer and each element index according to the relative importance of each layer and each element index on the carbon emission, and grading the value of each element index;
at present, more than 95% of county-level cities in the country are built into sewage treatment plants and put into operation, treatment processes, structures, equipment and the like are determined, and the newly-built sewage treatment plants consider more resource recycling of sewage and sludge and application of a carbon sink process in the design planning stage, so that on one hand, in the embodiment, in order to facilitate low-carbon operation of the stock sewage treatment plants, the reality and the service are respected; on the other hand, the method is beneficial to resource and low-carbon construction introduction of a newly-built sewage treatment plant, and in order to take account of balance between energy conservation and consumption reduction of mature technology and resource technology, balance between construction level and operation management level, and balance between current-term and medium-term economic development, in the embodiment, an energy consumption and material consumption aspect (F) is adopted1) Is assigned a weight of 0.3, resource reuse level (F)2) Has a weight distribution of 0.2, carbon sink level (F)3) Is assigned a weight of 0.1, carbon emission horizon (F)4) Is assigned a weight of 0.4.
In this embodiment, the weight distribution of each element index in each layer is as follows:
energy and material consumption layer (F)1) According to the calculation of carbon emission of the existing sewage treatment plant, the influence of the power consumption on the carbon emission is obviously larger than the carbon emission of the carbon source, the phosphorus removal medicament and the sludge medicament, so that the unit sewage power consumption (F) is calculated in the embodiment11) Has a weight of 0.4, and a unit oxygen-consuming pollutant power consumption (F)12) Weight distribution of (3) was 0.3, and carbon source consumption was reduced per total nitrogen (F)13) The weight distribution of (A) is 0.1, and the consumption of phosphorus removal agent is reduced per total phosphorus (F)14) Is assigned a weight of0.1, unit dry sludge dosage (F)15) Is assigned a weight of 0.1.
Resource reuse layer (F)2) At present, the main approaches for realizing resource recycling of sewage treatment plants are as follows: the effluent is reused for river supply, industrial cooling and the like by improving the effluent standard, so that the regeneration utilization rate of the sewage tail water is improved; the utilization rate of sludge resource is improved by the technologies of anaerobic digestion, incineration and the like of excess sludge; the system is a new energy utilization system which takes renewable energy sources such as solar photovoltaic power generation, water source heat pumps, wind energy and the like as cores, increases energy supply, optimizes energy structures, improves the self-sufficiency rate of energy sources in factories, and creates a multi-path and sustainable energy supply system. The operating target of carbon neutralization of a sewage treatment plant can be met to the greatest extent by means of excess sludge conversion energy and a sewage source heat pump, and the energy available for solar photovoltaic power generation is slightly low and can only meet about 10% of operating energy consumption. Therefore, the present embodiment will use the regeneration water utilization rate (F)21) The weight distribution of the sludge is 0.2, and the self-sufficiency rate (F) of the sludge resource energy22) The weight distribution of (A) is 0.3, and the self-supporting rate (F) of the solar photovoltaic power generation energy source23) The weight distribution of the heat pump is 0.1, and the energy self-sufficiency rate (F) of the water source heat pump24) The weight distribution of (D) is 0.3, the self-sufficiency of other energy sources (F)25) Is assigned a weight of 0.1.
Carbon sink plane (F)3) Including factory green space ratio (F)31) Ecological treatment process plant carbon fixation amount (F)32) Two key indicators, and both are the process of reducing the concentration of greenhouse gases in the atmosphere by plants absorbing carbon dioxide from the atmosphere. Therefore, in the present embodiment, the green space ratio (F) of the factory floor is set31) The weight distribution of (A) is 0.5, and the ecological treatment process plant carbon fixation amount (F)32) Is assigned a weight of 0.5.
Carbon emission level (F)4) Not only considering the carbon emission (F) of the unit sewage41) Further, the carbon emission per unit pollutant (F) related to the concentration of the water quality pollutant of the inlet water is taken into consideration42). And carbon emission per unit of wastewater (F)41) In contrast, carbon emission per unit pollutant (F)42) Can more clearly and objectively reflect the removal of the unit chemical oxygen demand,Five days of biochemical oxygen demand, ammonia nitrogen, total nitrogen and total phosphorus carbon emission. Therefore, in the present embodiment, the carbon emission (F) per unit wastewater41) Is assigned a weight of 0.4, carbon emission per pollutant (F)42) Is assigned a weight of 0.6.
The numerical values of each element index of each layer are graded as follows by combining the design scale of a sewage treatment plant and the actual operation current situation of the sewage treatment industry:
energy and material consumption layer (F)1):
TABLE 2 grading of indexes of each element in energy consumption and material consumption level
Resource reuse layer (F)2):
TABLE 3 grading of each element index of resource reuse level
Carbon sink plane (F)3):
TABLE 4 grading of each element index of carbon sink level
Carbon emission level (F)4):
Table 5 grading of each element index at carbon emission level
S3, collecting operation data of the sewage treatment plant, calculating index values of each element, and determining grading values of the index of each element;
in particular, energy and material consumption level (F)1) The calculation formula of each index is as follows:
unit ofSewage power consumption (F)11) Calculated as follows:
in the formula: f11-power consumption per unit of sewage, kWh/m3;Ema-monthly electricity consumption, kWh; qdaActual daily wastewater treatment, m3D; t-evaluation period effective operation days; tt — number of calendar months of evaluation period.
Unit oxygen pollutant consumption (F)12) Calculated as follows:
in the formula: f12-power consumption per oxygen-consuming pollutant, kWh/kg; BODraActual influent BOD5Daily average concentration, mg/L; BODeaActual effluent BOD5Daily average concentration, mg/L;actual feed water NH4 +-N daily average concentration, mg/L;actual water discharge NH4 +N daily average concentration, mg/L.
Carbon source consumption reduction per total nitrogen (F)13) Calculated as follows:
in the formula: f13-carbon source consumption reduction per total nitrogen, kg/kg; PAda-daily consumption of external carbon source, kg; TN (twisted nematic)raActual influent TN daily average concentration, mg/L; TN (twisted nematic)eaActual water output TN daily average concentration, mg/L.
The phosphorus removal agent consumption per total phosphorus reduction (F14) is calculated as follows:
in the formula: f14-reduction of phosphorus removal agent consumption per unit of total phosphorus, kg/kg; PAda-daily consumption of phosphorus removal agent, kg; TPraActual daily mean concentration of influent TP, mg/L; TPeaActual daily concentration of TP in the effluent, mg/L.
Unit dry sludge dosage (F)15) Calculated as follows:
in the formula: f15-unit dry sludge dosage, kg/t; PM (particulate matter)da-daily consumption of flocculant, kg; SC (Single chip computer)da-daily actual yield of dewatered sludge, t; SWda-daily average water content of dewatered sludge,%.
In particular, resource reuse (F)2) The calculation formula of each index of the layer is as follows:
regeneration water utilization rate (F)21) Calculated as follows:
in the formula: f21-regeneration water utilization,%; qzaActual daily reclaimed water utilization, m3/d;QpaActual daily sewage discharge, m3/d。
Self-sufficient rate of sludge resource (F)22) Calculated as follows:
in the formula: f22-sludge resource energy autonomy,%; eWAnnual energy production in sludge recycling, kWh.
Self-supporting rate (F) of solar photovoltaic power generation energy23) Calculated as follows:
in the formula: f23-self-sufficiency of solar photovoltaic power generation energy,%; egSolar photovoltaic annual energy production, kWh.
Water source heat pump energy self-sufficient rate (F)24) It should be calculated as follows:
in the formula: f24-water source heat pump energy autonomy,%; ebWater source heat pump annual heating and cooling capacity, kWh.
Other self-sufficient rate of energy (F)25) Calculated as follows:
in the formula: f25-other energy autonomy,%; eqOther pathway annual energy production, kWh.
Specifically, carbon sink (F)3) The calculation formula of each index of the layer is as follows:
plant area greening rate (F)31) Calculated as follows:
in the formula: f31-plant area greening rate,%; sgArea of green plant, m2;SwArea of green plant, m2。
Ecological treatment process plant carbon sequestration rate (F)32) Calculated as follows:
in the formula: f32-ecological treatment process of sewage treatment plant carbon sequestration rate, tCO2eq/a;
AjArea of canopy of the j plant in the ecological treatment process, m2。
EFCO2,jCarbon fixation coefficient of the j plant in the ecological treatment process, Kg/(m)2A), see table 6;
Egtotal annual carbon emission from a wastewater treatment plant, tCO2eq/a。
GWPCO2-CO2The value of the global warming potential value is 1.
TABLE 6 carbon fixation coefficient recommendations for different plants
Name of plant | Plant type | Carbon fixation coefficient/(kgCO)2/m2·a) |
Black algae | Submerged plant | 0.25 |
Herba Lophatheri and herba Equiseti Arvinsis | Floating plant | 0.41 |
Herba Equiseti Arvinsis | Submerged plant | 0.03 |
Stonewort Pusheng | Submerged plant | 0.31 |
Goldfish algae | Submerged plant | 0.03 |
Iris root | Emergent aquatic plant | 3.14 |
Gladiolus rhizome | Emergent aquatic plant | 6.74 |
All-grass of Reineckia | Emergent aquatic plant | 1.95 |
Reed | Emergent aquatic plant | 3.70 |
White mango | Emergent aquatic plant | 2.74 |
Festuca arundinacea | Emergent aquatic plant | 4.68 |
Poa pratensis | Emergent aquatic plant | 1.07 |
All-grass of Hemerocallis citrina | Emergent aquatic plant | 5.49 |
Root of Hemerocallis | Emergent aquatic plant | 2.80 |
Lotus flower | Floating plant | 4.50 |
Canna indica | Emergent aquatic plant | 4.77 |
Ophiopogon japonicus | Emergent aquatic plant | 1.37 |
In particular, carbon emission levels (F)4) The calculation method or formula of each index is as follows:
carbon emission per unit of wastewater (F)41): the calculation is carried out according to the technical guidance (trial) of the coordinated control of the greenhouse gas accounting for the removal of pollutants in urban sewage treatment plants, which is released in 2018 of the national ministry of ecological environment in 4 months.
Carbon emission per unit pollutant (F)42) The following calculation formula is adopted:
in the formula: f42Carbon emission per unit of pollutant, kgCO2eq/kg;
QdaiDaily average of sewage treatment plantsTreatment amount, m3/d;
CODraiDaily average chemical oxygen demand concentration of inlet water, kg/m3;
CODeaiDaily average chemical oxygen demand concentration of effluent, kg/m3;
BODraiDaily average biochemical oxygen demand concentration of inlet water for five days, kg/m3;
BODeaiFive-day biochemical oxygen demand daily average concentration of effluent, kg/m3;
NH4 +-NraiDaily average concentration of ammonia nitrogen in inlet water, kg/m3;
NH4 +-NeaiThe daily average concentration of ammonia nitrogen in the effluent is kg/m3;
TNrai-total nitrogen daily average concentration of influent water, kg/m3;
TNeaiThe total nitrogen daily average concentration of effluent, kg/m3;
TPrai-total phosphorus daily average concentration in influent water, kg/m3;
TNeaiThe daily average concentration of total phosphorus in the effluent is kg/m3。
The following description of the carbon emission amount of unit sewage (F) by taking the method for constructing the carbon emission evaluation index system of a sewage treatment plant disclosed by the invention applied to a certain sewage treatment plant as an example41) And carbon emission per unit pollutant (F)42) The method of (3).
Engineering sewage treatment scale of a certain sewage treatment plant is 20 ten thousand meters3D, total coefficient of variation Kz1.3, adopting a sewage treatment process taking AAO + deep bed filter tank filtration as a main body, adopting a treatment process of carrying out centrifugal dehydration on sludge to 80% of water content and then transporting sludge cakes, adopting an ultraviolet disinfection process for disinfection, and adopting a microbial deodorization process for deodorization. The plant area greening rate is 35%, and no ecological treatment process is adopted. The tail water is treated to stably reach surface IV water and is discharged into nearby river channels to serve as a supplementary water source, and the utilization rate of the regenerated water reaches 100%. The sewage treatment plant adopts distributed photovoltaic power generation, the total installed capacity of a project is 1.80792MW, and a 10kV voltage level is adoptedThe solar energy is connected to a user side power grid to supply power to a plant area, and the solar energy generating capacity accounts for 132.1240 ten thousand kilowatt-hours in 2020. The average concentration of the water entering the sewage treatment plant all year round in 2020 is as follows: COD 198mg/L, BOD5=89.46mg/L,NH4 +-N27.35 mg/L, TN 34.53mg/L, TP 2.57 mg/L; the average concentration of the effluent from the factory in year is as follows: COD 16.6mg/L, BOD5=4.00mg/L,NH4 +-N=0.14mg/L,TN=4.14mg/L,TP=0.10mg/L。
The carbon emission (F) of the unit sewage is calculated by the sewage treatment plant according to the technical guideline for the coordinated control of the removal of pollutants in the urban sewage treatment plant and the accounting of greenhouse gases (trial)41) 0.391kg of CO2/m3The specific calculation process of water is shown in table 7, and the sewage treatment process in table 7 is an AAO process.
TABLE 7 accounting for 2020 year pollutant removal and greenhouse gas emission reduction of certain sewage treatment plant
Carbon emission per unit of wastewater (F)41)=20606.38×1000/52707283=0.391kg CO2/m3And (3) water.
Carbon emission per unit pollutant (F)42) Calculated as follows:
F42=0.391×144009/((0.3×(198-16.6)+0.1×(89.46-4.00)+0.3×(27.35-0.14)+0.2×(34.53-4.14)+0.1×(2.57-0.14))×0.001×144009)=5.05kgCO2eq/kg。
in this embodiment, the index classification values of the elements of a certain sewage treatment plant obtained according to the steps from S1 to S3 are shown in Table 8.
TABLE 8 grading values of various indexes of elements of a sewage treatment plant
S4, constructing a variable-weight carbon emission comprehensive evaluation index meeting the normalization, and completing the construction of a dynamic sewage treatment plant carbon emission comprehensive evaluation index system;
the carbon emission comprehensive evaluation index calculation formula is specifically as follows:
wherein F is a comprehensive evaluation index of carbon emission, lambdaiIs the weight of the ith layer, gammaiIs the weight of the ith element, Fi,j is the index grading value of each element.
The carbon emission comprehensive evaluation index F of the sewage treatment plant is 0.3 × (0.4 × 0.74+0.3 × 0.70+0.1 × 0.98+0.1 × 0.93+0.1 × 0.80) +0.2 × (0.2 × 1+0.3 × 0+0.1 × 0.92+0.3 × 0+0.1 × 0) +0.1 × (0.5 × 0.9+0.5 × 0) +0.4 × (0.4 × 0.85+0.6 × 0.85) ═ 0.6765 × (
Along with the improvement of the whole operation level of the sewage treatment plant and the gradual deep understanding of the industry on carbon emission, the weight lambda of each layeriWeight gamma of each element indexiAnd the grading of each element index changes along with the grading of each element index, so that a dynamic carbon emission index system of the sewage treatment plant is obtained, and the dynamic evaluation and the accurate evaluation of the carbon emission level of the sewage treatment plant are realized.
And S5, evaluating the carbon emission level of the sewage treatment plant by using the obtained comprehensive evaluation index of the carbon emission.
The carbon emission level of the sewage treatment plant can be further evaluated by utilizing the obtained carbon emission comprehensive evaluation index, and the higher the carbon emission comprehensive evaluation index is, the lower the carbon emission level of the sewage treatment plant is; the lower the carbon emission composite evaluation index, the higher the carbon emission level of the sewage treatment plant as a whole. The carbon emission level of sewage treatment plants is also specifically requiredAnd the actual operation management level, the resource recycling level, whether a carbon sink process is adopted or not and the like are combined for specific analysis. The comprehensive evaluation index F of the carbon emission of the sewage treatment plant is 0.6765, the carbon emission level is general, and the analysis is as follows: firstly, the daily average water quantity of the sewage treatment plant is 144009m3D, not reaching the design scale of 20 ten thousand m3The sewage load rate is only 72 percent, so the unit sewage power consumption (F) of the energy consumption and material consumption level is directly caused11) And power consumption per unit oxygen-consuming pollutant (F)12) Is higher. Secondly, the resource recycling of the sewage treatment plant only relates to recycling of reclaimed water, and is lack of energy resource recycling modes such as sludge, water source heat pumps and the like, and is lack of plant carbon fixation of an ecological treatment process. Comprehensive analysis shows that the carbon emission level of the sewage treatment plant is general at present, and the sewage treatment plant has a larger carbon emission and emission reduction space in the future.
The above description is only an example of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A method for constructing a carbon emission evaluation index system of a sewage treatment plant is characterized by comprising the following steps: s1, constructing a carbon emission index system framework of the sewage treatment plant, and dividing a hierarchical structure by adopting an analytic hierarchy process, wherein the hierarchical structure comprises layers and element indexes contained in each layer; s2, determining the weight of each layer and each element index according to the relative importance of each layer and each element index on the carbon emission, and grading the value of each element index; s3, collecting operation data of the sewage treatment plant, calculating index values of each element, and determining grading values of the index of each element; s4, constructing a variable-weight carbon emission comprehensive evaluation index meeting the normalization, and completing the construction of a dynamic sewage treatment plant carbon emission comprehensive evaluation index system; and S5, evaluating the carbon emission level of the sewage treatment plant by using the obtained comprehensive evaluation index of the carbon emission.
2. The carbon emission evaluation finger of sewage treatment plant according to claim 1Method for building a standard system, characterized in that said levels comprise a power consumption and material consumption level (F)1) Resource reuse layer (F)2) Carbon sink plane (F)3) And carbon emission level (F)4)。
3. The method of constructing a carbon emission assessment indicator system for a wastewater treatment plant according to claim 2, characterized in that said energy and material consumption level (F)1) Including unit sewage power consumption (F)11) And power consumption per unit oxygen-consuming pollutant (F)12) Reduction of carbon source consumption per total nitrogen (F)13) Reduction of phosphorus removal agent consumption per total phosphorus (F)14) And the unit dry sludge dosage (F)15)。
4. The method of construction of a wastewater treatment plant carbon emission evaluation indicator system according to claim 2, characterized in that the resource reuse level (F)2) Including regeneration water utilization factor (F)21) Self-sufficient rate of sludge resource (F)22) Self-supporting rate of solar photovoltaic power generation energy (F)23) Water source heat pump energy self-sufficient rate (F)24) Other energy self-sufficiency rate (F)25)。
5. The method of constructing a carbon emission assessment indicator system for a wastewater treatment plant according to claim 2, characterized in that said carbon sink level (F) is a carbon sink level (F)3) Including green space ratio (F)31) And ecological treatment process plant carbon sequestration rate (F)32)。
6. Method for constructing a carbon emission evaluation index system for a wastewater treatment plant according to claim 2, characterized in that the level of carbon emissions (F)4) Including carbon emission per unit of wastewater (F)41) And carbon emission per unit pollutant (F)42)。
7. The method for constructing a carbon emission evaluation index system for a sewage treatment plant according to claim 6, wherein the carbon emission per unit pollutant (F)42) Is calculated byThe formula is as follows:
wherein F42Carbon emission per pollutant, kgCO2eq/kg;F41kgCO is the carbon emission per unit of wastewater2eq/m3;QdaiIs the daily treatment capacity of a sewage treatment plant, m3/d;CODraiThe chemical oxygen demand of the inlet water is the daily average concentration, mg/L; CODeaiThe chemical oxygen demand daily average concentration of effluent is mg/L; BODraiThe biochemical oxygen demand daily average concentration is mg/L in five days of water inflow; BODeaiThe biochemical oxygen demand daily average concentration of effluent five days is mg/L; NH (NH)4 +-NraiThe daily average concentration of the ammonia nitrogen in the inlet water is mg/L; NH (NH)4 +-NeaiThe daily average concentration of the ammonia nitrogen in the effluent is mg/L; TN (twisted nematic)raiThe total nitrogen daily average concentration of the inlet water is mg/L; TN (twisted nematic)eaiThe total nitrogen daily average concentration of effluent is mg/L; TPraiThe daily average concentration of total phosphorus in the feed water is mg/L; TPeaiThe total phosphorus daily average concentration of the effluent is mg/L.
8. The method for constructing the carbon emission evaluation index system of the sewage treatment plant according to claim 1, wherein the calculation formula of the variable-weight carbon emission comprehensive evaluation index satisfying the normalization is as follows:
wherein F is a comprehensive evaluation index of carbon emission, lambdaiIs the weight of the ith layer, gammaiWeight of the j-th element index, FiAnd j is a ranking value of each element index.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111407904.2A CN114239230A (en) | 2021-11-19 | 2021-11-19 | Method for constructing carbon emission evaluation index system of sewage treatment plant |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111407904.2A CN114239230A (en) | 2021-11-19 | 2021-11-19 | Method for constructing carbon emission evaluation index system of sewage treatment plant |
Publications (1)
Publication Number | Publication Date |
---|---|
CN114239230A true CN114239230A (en) | 2022-03-25 |
Family
ID=80750939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111407904.2A Pending CN114239230A (en) | 2021-11-19 | 2021-11-19 | Method for constructing carbon emission evaluation index system of sewage treatment plant |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114239230A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114462891A (en) * | 2022-04-07 | 2022-05-10 | 国家电投集团科学技术研究院有限公司 | Carbon emission detection method and device |
CN115222208A (en) * | 2022-06-23 | 2022-10-21 | 同济大学 | Water-energy-carbon coupling model and application thereof in operation evaluation of sewage treatment mechanism |
CN115392757A (en) * | 2022-08-31 | 2022-11-25 | 中国长江三峡集团有限公司 | Quantitative evaluation method and device for carbon emission of town sewage treatment facility |
CN116307932A (en) * | 2023-05-11 | 2023-06-23 | 天津创业环保集团股份有限公司 | Sewage treatment capacity calculation and evaluation method and device for sewage plant |
CN116432948A (en) * | 2023-03-16 | 2023-07-14 | 中节能国祯环保科技股份有限公司 | Urban rain source type river system step-by-step treatment method |
CN116542574A (en) * | 2023-05-25 | 2023-08-04 | 长江生态环保集团有限公司 | Sewage treatment plant system efficiency evaluation method and system based on analytic hierarchy process |
-
2021
- 2021-11-19 CN CN202111407904.2A patent/CN114239230A/en active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114462891A (en) * | 2022-04-07 | 2022-05-10 | 国家电投集团科学技术研究院有限公司 | Carbon emission detection method and device |
CN115222208A (en) * | 2022-06-23 | 2022-10-21 | 同济大学 | Water-energy-carbon coupling model and application thereof in operation evaluation of sewage treatment mechanism |
CN115222208B (en) * | 2022-06-23 | 2023-05-09 | 同济大学 | Sewage treatment mechanism evaluation method |
CN115392757A (en) * | 2022-08-31 | 2022-11-25 | 中国长江三峡集团有限公司 | Quantitative evaluation method and device for carbon emission of town sewage treatment facility |
CN115392757B (en) * | 2022-08-31 | 2023-07-28 | 中国长江三峡集团有限公司 | Quantitative evaluation method and device for carbon emission of town sewage treatment facility |
CN116432948A (en) * | 2023-03-16 | 2023-07-14 | 中节能国祯环保科技股份有限公司 | Urban rain source type river system step-by-step treatment method |
CN116432948B (en) * | 2023-03-16 | 2024-05-10 | 中节能国祯环保科技股份有限公司 | Urban rain source type river system step-by-step treatment method |
CN116307932A (en) * | 2023-05-11 | 2023-06-23 | 天津创业环保集团股份有限公司 | Sewage treatment capacity calculation and evaluation method and device for sewage plant |
CN116307932B (en) * | 2023-05-11 | 2023-08-11 | 天津创业环保集团股份有限公司 | Sewage treatment capacity calculation and evaluation method and device for sewage plant |
CN116542574A (en) * | 2023-05-25 | 2023-08-04 | 长江生态环保集团有限公司 | Sewage treatment plant system efficiency evaluation method and system based on analytic hierarchy process |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN114239230A (en) | Method for constructing carbon emission evaluation index system of sewage treatment plant | |
Koutsou et al. | Domestic wastewater management in Greece: Greenhouse gas emissions estimation at country scale | |
Khiewwijit et al. | Energy and nutrient recovery for municipal wastewater treatment: how to design a feasible plant layout? | |
Simon-Várhelyi et al. | Reducing energy costs of the wastewater treatment plant by improved scheduling of the periodic influent load | |
Sarpong et al. | Evaluation of energy recovery potential in wastewater treatment based on codigestion and combined heat and power schemes | |
Vassallo et al. | Emergy required for the complete treatment of municipal wastewater | |
Li et al. | Assessment of energy use and environmental impacts of wastewater treatment plants in the entire life cycle: A system meta-analysis | |
Sarpong et al. | Energy autarky of small scale wastewater treatment plants by enhanced carbon capture and codigestion–a quantitative analysis | |
Zhang et al. | Effect of the tap water supply system on China's economy and energy consumption, and its emissions’ impact | |
Taha et al. | Potential application of renewable energy sources at urban wastewater treatment facilities in Palestine: three case studies | |
CN102874926A (en) | System and method for treating sewage by using unpowered oxygen-supply ecological filter | |
Su et al. | Water–energy–carbon nexus: greenhouse gas emissions from integrated urban drainage systems in China | |
CN115222208A (en) | Water-energy-carbon coupling model and application thereof in operation evaluation of sewage treatment mechanism | |
CN102153253B (en) | Side flow aeration biofilter-side flow artificial wetland combined reclaimed water treatment system | |
Baş et al. | Environmental and techno-economic analysis of the integration of biogas and solar power systems into urban wastewater treatment plants | |
CN107352738B (en) | Composite artificial ecological bed sewage treatment system and method for enhancing nitrogen and phosphorus removal | |
CN109111050A (en) | Solar energy microkinetic rural sewage treatment system | |
Allam | A theoretical application of the Extended Metabolism Model in Port Louis in a bid to promote urban sustainability | |
Modiri et al. | Assessment of water-energy-emissions nexus in wastewater treatment plants using emergy analysis | |
Saghafi et al. | Electrical energy management in industrial wastewater treatment plant | |
Sarpong et al. | Towards Sustainable Wastewater Treatment—A Holistic Study of Energy and Resource Recovery | |
Sakti et al. | Water-Energy Nexus Flow Analysis of a Wastewater Treatment Plant in Thailand | |
Yu et al. | Application of a water-energy-carbon coupling index to evaluate the long-term operational stability of the anaerobic-anoxic-oxic-membrane bioreactor (A2/O-MBR) process under the influence of rainstorms | |
Lin et al. | Study on “Carbon Neutral” path of Beihu wastewater treatment plant in Wuhan | |
Aghabalaei et al. | Energy Reports |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination |