CN115935739A - Overall comprehensive evaluation method for landfill - Google Patents
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Abstract
The invention discloses a landfill site integral comprehensive evaluation method, which comprises the steps of obtaining elements influencing landfill site comprehensive suitability evaluation, and calculating the weight of all the elements and a comprehensive suitability evaluation result based on an analytic hierarchy process; determining main pollutants and content of groundwater of the landfill site, determining quality categories and scores of the main pollutants of the groundwater of the landfill site, and calculating comprehensive evaluation scores of the groundwater pollutants and quality levels of the groundwater; constructing a landfill degradation-consolidation-solute migration coupling model, and calculating a degradation stabilization index, a landfill gas stabilization index and a landfill settlement stabilization index of the municipal solid waste; developing an OntoCA body, integrating the operation body model, generating inference data, inquiring from the inference data according to inquiry requirements and acquiring inquiry results. The values of all indexes of the landfill can be obtained, suggestions are provided for construction management and ecological environment of the landfill based on all indexes, and the utilization rate and safety of the landfill are improved.
Description
Technical Field
The invention relates to the field of overall evaluation of a household garbage landfill, in particular to an overall comprehensive evaluation method for a landfill.
Background
In the process of urbanization in China, municipal solid wasteThe number of the landfill sites is gradually increased, and the stability problem of the landfill sites is increasingly prominent. The rapid urbanization construction generates a large amount of solid wastes, and China generates nearly 10 million tons of garbage every year, wherein the yield of the household garbage is about 2.7 multiplied by 10 4 More than 70% of the garbage is treated by a landfill. In order to effectively utilize site units to improve the capacity of unit landfill garbage, ultrahigh large-scale landfill sites are very common, and the stability problem of more and more landfill sites is caused. Therefore, comprehensive evaluation of the stabilization of the landfill site can better guide the extension and repair of the landfill site, can better promote the stabilization process of the landfill site, and has both economy and environmental protection.
From the existing stabilization evaluation of the landfill, the stabilization evaluation of the landfill cannot be comprehensively carried out only aiming at a certain factor or a certain aspects of the stabilization of the landfill, the evaluation standards are scattered and not uniform, and all indexes of the stabilization of the landfill do not form a complete system. In order to be able to evaluate landfills from multiple angles, it is necessary to evaluate different aspects of a landfill in a comprehensive manner. The comprehensive evaluation of the stability of the landfill site covers the aspects of comprehensive suitability, groundwater pollution, stabilization degree and the like of the landfill site.
Disclosure of Invention
The invention provides a comprehensive evaluation method for a whole landfill to overcome the technical problems.
A comprehensive evaluation method for the whole landfill site comprises the following steps,
the method comprises the steps of firstly, constructing a comprehensive suitability evaluation model to carry out comprehensive suitability evaluation on the landfill, and obtaining elements influencing the comprehensive suitability evaluation of the landfill, wherein the elements are divided into three types of engineering construction, operation management and ecological construction, the engineering construction comprises eight elements including design service life, site selection, an anti-seepage system, a percolate inverting and treating system, rain and sewage diversion, landfill gas collection and treatment, a monitoring well and equipment configuration, the operation management comprises eleven elements including site entering refuse inspection, weighing and metering, unit landfill, refuse spreading and compaction, refuse dump bodies, plant area disinfection, flying object pollution control, operation management, percolate treatment, environmental monitoring and environmental influence and safety management, the ecological construction comprises two elements including landscape coordination and vegetation coverage,
calculating the weight of all elements based on an analytic hierarchy process, and calculating a comprehensive suitability evaluation result of the landfill according to the score and the weight of each element of the landfill;
constructing a pollution evaluation model to evaluate the pollution of the landfill, wherein the pollution evaluation model comprises the steps of analyzing the components of the percolate to determine the main pollutants and the content of the main pollutants in the groundwater of the landfill, determining the quality category and the grade of the main pollutants in the groundwater of the landfill based on a groundwater quality grading method, calculating the comprehensive evaluation value of the groundwater pollutants, and determining the quality grade of the groundwater according to the comprehensive evaluation value;
thirdly, constructing a stabilization evaluation model to carry out stabilization evaluation on the landfill, comprising constructing a landfill degradation-consolidation-solute migration coupling model, calculating a degradation stabilization index, a landfill gas stabilization index and a landfill settlement stabilization index of the municipal solid waste according to the landfill degradation-consolidation-solute migration coupling model,
and step four, developing an OntoCA body, wherein the developing OntoCA body comprises the steps of obtaining basic data, defining classes and class attributes in the body model, creating individuals, establishing landfill assessment rules, integrating the operation body model and generating inference data, inquiring from the inference data according to inquiry requirements, and obtaining inquiry results.
Preferably, the calculating the weight of all the elements based on the analytic hierarchy process includes,
1a, regarding the weight of the stabilization integrity of the refuse landfill as A, and regarding the weight of the engineering construction as B 1 The weight of the operation management is B 2 The weight of ecological construction is B 3 The weight of the design lifetime is C 1 The weight of the selected address is C 2 The weight of the impermeable system is regarded as C 3 The weight of the percolate reverse-discharging and treating system is regarded as C 4 The weight of the flow of rain and sewage is C 5 The weight of the landfill gas collection treatment is C 6 Weighted view of monitoring wellIs C 7 The weight of the device configuration is considered to be C 8 The weight of the incoming garbage inspection is regarded as C 9 The weight of the weighing is regarded as C 10 The weight of the unit-by-unit landfill is C 11 The weight of spreading and compacting the garbage is regarded as C 12 The weight of the garbage heap is C 13 The weight of factory killing is regarded as C 14 The weight of the pollution control of the flying object is regarded as C 15 The weight of operation management is C 16 The weight of leachate treatment is regarded as C 17 The weight of environmental monitoring and environmental impact is C 18 The weight of security management is C 19 The weight of the landscape harmony is C 20 The weight of vegetation coverage is C 21 ，
1B, structures A and B 1 、B 2 、B 3 a-B judgment matrix, calculating the consistency index value of the A-B judgment matrix, and calculating B when the first threshold is met 1 、B 2 、B 3 The weight of (a) is calculated,
1c, structure B 1 And C 1-8 B between 1 -C 1-8 Judging the matrix, calculating B 1 -C 1-8 Judging the consistency index value of the matrix, and calculating C when the consistency index value meets a first threshold value 1 、C 2 、C 3 、C 4 、C 5 、C 6 、C 7 、C 8 The weight of (a) is calculated,
1d, structure B 2 And C 9-19 B between 2 -C 9-19 Judging the matrix, calculating B 2 -C 9-19 Judging the consistency index value of the matrix, and calculating C when the consistency index value meets a first threshold value 9 、C 10 、C 11 、C 12 、C 13 、C 14 、C 15 、C 16 、C 17 、C 18 、C 19 The weight of (a) is calculated,
1e, structure B 3 And C 20-21 B between 3 -C 20-21 Determining matrix, calculating B 3 -C 20-21 Judging the index value of the consistency of the matrix, and calculating C when the index value meets a first threshold value 20 、C 21 The weight of (c).
Preferably, the calculating of the comprehensive assessment score of the pollutant includes calculating the comprehensive assessment score according to formula (1),
wherein, F iavg Scoring F for contaminants in the ith contaminant class i Average value of (1), F i Scoring for contaminants, n being the total number of contaminant classes; f imax Scoring F for contaminants in the ith contaminant category i Maximum value of (d); FI is the comprehensive assessment score for the contaminants.
Preferably, the constructing the landfill degradation-consolidation-solute migration coupling model comprises establishing the landfill degradation-consolidation-solute migration coupling model according to formulas (3), (4), (5) and (6),
wherein u represents displacement, u w Indicates pore water pressure u a Indicates pore pressure and chemical solute concentration c i ，
For a net stress vector, P is a linear operator, and>
coefficient matrices corresponding to the increment of framework strain due to the net stress increment, S t Changing a coefficient matrix corresponding to the framework strain increment caused by the deformation resistance of the framework for biochemical reaction, b is a physical vector,
ν w is the seepage velocity vector (m/s) of pore water, and R is the gas state constant (m) 3 K/mol), T is the gas temperature (K), na is the total flux of pore gases, D i Is a molecular diffusion/mechanical diffusion coefficient matrix of the ith solute, C ua ，C uw ，C uu ，C wa ，C ww 、C w And C wu 、C aa 、C a 、C aw 、C au1 、C au2 、/>
Are operator matrices with respect to spatial coordinates, and t is time.
Preferably, the calculating of the degradation stabilization index of the municipal solid waste, the landfill gas stabilization index, the landfill settlement stabilization index includes calculating the degradation stabilization index according to formula (7), calculating the landfill gas stabilization index according to formula (8), calculating the landfill settlement stabilization index according to formula (9),
wherein, Λ 1 Is the degradation stabilization index of the refuse landfill, Λ 2 Is the gas stabilization index of the landfill site 3 Is the landfill settlement stabilization index, R C/L (t) is the ratio of the cellulose to lignin contents in the solid waste with landfill age t, R C/L (t 0 ) Is the ratio of the content of cellulose to the content of lignin, lr and L in the fresh solid waste 0 Respectively the residual value and the initial value of the landfill gas generation potential, lt is the unit mass landfill gas cumulative yield at the time t, S t The average settling volume of the landfill at time t; s. the ∞ Is the final settling volume of the landfill.
Preferably, said step four comprises, in a first step,
(1) Acquiring basic data including the grade and weight of each element of the landfill site in the step one, the main pollutants and content of the sewage of the landfill site in the step two, the ratio of the content of cellulose and lignin in the solid wastes required by calculating the degradation stabilization index of the municipal solid wastes in the step three, the landfill gas generation potential required by calculating the gas stabilization index of the landfill site and the sedimentation amount required by calculating the sedimentation stabilization index of the landfill site,
(2) Defining classes and class attributes in the ontology model, wherein the classes and class attributes comprise establishing a parent class and a child class, the parent class comprises a comprehensive suitability evaluation class, a pollution evaluation class, a stabilization evaluation class and an evaluation standard class, and the evaluation standard class comprises an integral grade class, a pollutant grade class, a degradation stabilization class, a landfill gas stabilization class and a sedimentation stabilization class;
(3) Establishing subclasses under the comprehensive suitability evaluation class according to factors influencing the comprehensive suitability evaluation of the landfill, establishing subclasses under the pollution evaluation class according to the pollutant class, establishing subclasses under the stabilization evaluation class according to the factors influencing the stabilization evaluation of the landfill, and establishing subclasses according to the attributes of various classes in the evaluation standard class;
(4) Creating the individual comprises selecting a specified class to create an individual name, and defining the object attribute and the data attribute of the individual;
(5) Establishing a landfill assessment rule, wherein the landfill assessment rule comprises the steps of establishing calculation rules of all elements and total scores of engineering construction, operation management and ecological construction in comprehensive suitability evaluation, the calculation rules of the overall scores of the comprehensive suitability, the calculation rules of the comprehensive evaluation scores of all pollutants, and the calculation rules of degradation stabilization indexes, landfill gas stabilization indexes and landfill settlement stabilization indexes;
(6) Integrating the operation ontology model and generating inference data, wherein basic data and rules are input into the model for integration to generate inference data;
(7) And inquiring from the reasoning data and obtaining an inquiry result according to inquiry requirements, wherein the inquiry requirements comprise the grade and the weight of each element, the comprehensive suitability evaluation result of the landfill, the comprehensive evaluation value of underground water pollutants, the degradation stabilization index of municipal solid waste, the gas stabilization index of the landfill and the sedimentation stabilization index of the landfill.
The invention provides a comprehensive evaluation method for the whole landfill site, which is characterized in that a landfill site evaluator inputs basic data through a developed ontology model, operates the ontology model, and can quickly obtain evaluation indexes of the stability of the landfill site according to a reasoning machine and a preset semantic rule, such as comprehensive suitability evaluation score, pollutant evaluation index, landfill site degradation stabilization evaluation index, landfill gas stabilization evaluation index, settlement stabilization evaluation index and the like. Related personnel can check the inferred result, so that the current situation of the sanitary landfill can be comprehensively known, then suggestions are provided for the construction management and the ecological environment of the landfill, and the utilization rate, the safety and the economic applicability of the landfill are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a basic problem and capability problem of the present invention;
FIG. 3 is a class and attributes established by the Prot é -OWL 5.5 of the present invention;
FIG. 4 is an individual EC creation of the present invention;
FIG. 5 is an individual T1 creation of the present invention;
FIG. 6 is a graph of degradation and landfill stabilization index over time in accordance with the present invention;
FIG. 7 is a graph of sedimentation stabilization index over time in accordance with the present invention;
FIG. 8 is a comprehensive suitability assessment inference interface of the present invention;
FIG. 9 is a contaminant inference interface of the present invention;
FIG. 10 is a stabilization process inference interface of the present invention;
FIG. 11 is a contaminant according to the present invention with FI value greater than 18;
FIG. 12 is a contaminant of the present invention with FI greater than 18;
FIG. 13 is a minimum, maximum, and mean FI value of the present invention;
FIG. 14 is a score of the engineering construction component of the present invention;
FIG. 15 is a composite suitability assessment score according to the invention;
FIG. 16 is a ranked list of degradation stabilization indicators according to the present invention;
FIG. 17 is a ranked list of landfill gas stabilization indicators according to the present invention;
FIG. 18 is a ranked list of sedimentation stabilization indicators 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 and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, 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.
Fig. 1 is a flowchart of the method of the present invention, and as shown in fig. 1, the method of this embodiment may include:
comprehensive suitability evaluation is carried out on the landfill, and a huge index system is needed for carrying out systematic evaluation on the whole landfill, because the landfill is a composite system, the structure is complex, the layers are numerous, and subsystems mutually influence and interact. In order to ensure the reasonability and the effectiveness of comprehensive evaluation, an index system is constructed according to the principles of scientificity, purpose, systematicness, hierarchy, focus and feasibility, and an analytic object of an analytic hierarchy process is introduced.
The comprehensive suitability evaluation of the landfill site is divided into two parts of construction and management, and ecological construction factors need to be considered in order to meet the construction requirements of the novel landfill site, so the stability evaluation of the landfill site starts from three aspects of engineering construction, operation management and ecological construction. Each major aspect relates to a plurality of sub-elements, and the respective sub-elements are screened out by inquiring GB50869-2013 technical Specification for sanitary landfill treatment of domestic garbage, CJJ/T107-2019 harmless evaluation Standard for landfill of domestic garbage and CJJ93-2011 technical Specification for operation and maintenance of sanitary landfill of domestic garbage according to actual conditions. The engineering construction comprises eight aspects of design service life, site selection, an anti-seepage system, a percolate reverse drainage and treatment system, rain and sewage diversion, landfill gas collection and treatment, a monitoring well and equipment configuration. The operation management comprises eleven aspects of inspection of refuse entering a field, weighing and metering, unit-based landfill, spreading and compaction of refuse, refuse stacking, plant area disinfection, pollution control of flying objects, operation management, percolate treatment, environmental monitoring and environmental influence and safety management. The ecological construction consists of two aspects of landscape harmony and vegetation coverage rate.
Constructing a judgment matrix, stabilizing the integrity A of the refuse landfill, and receiving engineering construction B 1 Operation management B 2 Ecological construction B 3 Restriction by three major influencing factors, B i And is composed of several secondary restriction factor layers C i And (4) restriction. Constructing an A-B judgment matrix between the layer A and the layer B:
calculating the consistency index value of the A-B judgment matrix, and calculating B1, B2 and B when the first threshold is satisfied 3 The weights of the layer B are as follows: 0.5949:0.2766:0.1285.
Engineering construction B 1 B is obtained according to the above calculation 1 Weight of comprehensive suitability evaluation of stability in a landfill: 0.5949, calculated as described above, design age C 1 Location C 2 Seepage-proofing system C 3 Percolate inverting and treating system C 4 Distribution of rain and sewage C 5 Landfill gas collecting treatment C 6 Monitoring well C 7 Weight C of equipment configuration in engineering construction 8 Can construct B 1 Layer and C 1-8 B between layers 1 -C 1-8 Judging a matrix:
calculating B 1 -C 1-8 And judging the consistency index value of the matrix, wherein the consistency index value meets a first threshold, and the weights of the engineering construction are as follows: 0.0429:0.0270:0.1142:0.0216:0.0937:0.2500:0.0541:0.2021.
operation management B 2 B is obtained according to the above calculation 2 Weight of comprehensive suitability evaluation of stability in a landfill: 0.2766, calculated as above, inspection of incoming refuse C 9 Weighing and metering C 10 In units of landfill C 11 Spreading and compacting garbage C 12 Garbage pile C 13 Plant area killing C 14 Control of pollution by flying objects C 15 Operation management C 16 Leachate treatment C 17 Environmental monitoring and environmental impact C 18 Safety management C 19 Can construct B 2 Layer and C 9-19 B between layers 2 -C 9-19 Judging a matrix:
calculation of B 2 -C 9-19 And judging the consistency index value of the matrix, wherein the consistency index value meets a first threshold, and the running management weights are as follows: 0.0616:0.0542:0.0593:0.0531:0.0440:0.0413:0.0350:0.0937:0.2273:0.2036:0.1270.
ecological construction B 3 B is obtained according to the above calculation 2 Weight of comprehensive suitability evaluation of stability in a landfill: 0.1285, calculated as above, landscape harmony C 20 Vegetation coverage C 21 Can construct B 3 Layer and C 20-21 B between layers 3 -C 20-21 Judging a matrix:
calculation of B 3 -C 20-21 And judging the consistency index value of the matrix, wherein the consistency index value of the matrix meets a first threshold value. Calculating and obtaining the weight ratio among the elements through a query specification and an analytic hierarchy process: engineering construction, operation management, ecological construction weight ratio is: 0.5949:0.2766:0.1285, design life: site selection: an anti-seepage system: leachate inverted discharging and treating system: rain and sewage diversion: collecting and treating landfill gas: a monitoring well: device configuration =0.0429:0.0270:0.1142:0.0216:0.0937:0.2500:0.0541:0.2021, inspection of garbage in the field: weighing and metering: and (3) unit landfill: spreading and compacting garbage: garbage stacking: and (3) killing the plant: controlling pollution of the flying objects: operation management: leachate treatment, environmental monitoring and environmental impact: security management =0.0616:0.0542:0.0593:0.0531:0.0440:0.0413:0.0350:0.0937:0.2273:0.2036:0.1270, landscape harmony: vegetation coverage =0.3333:0.6667.
and (3) integrating all indexes of the C level, and connecting the indexes of the B level to obtain the weight ratio of all indexes as follows: design service life: site selection: an anti-seepage system: leachate dumping and treatment system: rain and sewage diversion: collecting and treating landfill gas: a monitoring well: equipment configuration: inspecting the garbage entering a field: weighing and metering: and (3) unit landfill: spreading and compacting garbage: garbage stacking: and (3) eliminating the plant area: controlling pollution of the flying objects: operation management: leachate treatment, environmental monitoring and environmental impact: safety management: landscape coordination: vegetation coverage =0.0255:0.0161:0.0679:01285:0.0557:0.1487:0.0322:0.1202:0.0170:0.0150:0.0164:0.0147:0.0122:0.0114:0.0097:0.0259:0.0629:0.0563:0.0351:0.0428:0.0859.
introducing a scoring system: adopting a complete grading system, wherein the grading standard of the sub-elements refers to CJJ/T107-2019 harmlessness Standard of municipal solid waste landfill, and the final evaluation result is A 1 The judgment standard is as follows: if A 1 >=8.5, rating 1, indicating that the detoxification treatment requirement was met; if 7.0<＝A 1 <8.5, the rating is 2, which indicates that the harmless treatment requirement is basically met; if 6.0<＝A 1 <7.0, the rating is 3, the harmless treatment requirement is not met, but the centralized controlled treatment is carried out on partial pollution; if A 1 <6.0, the grade is 4, the method belongs to simple landfill and pollutes the environment.
Pollution evaluation is carried out on the landfill, and the problem of landfill garbage pollution generally exists. This example uses an underground water quality scoring method. The main pollutants in the leachate can be divided into five categories of organic matters, inorganic salts, heavy metals, bacteria and heterogeneous biological organic compounds. In order to meet the reliability of data, pollutants with large sample quantity and average numerical value are selected, and the main pollutants in the groundwater of the domestic garbage landfill site in China are shown in the following table:
TABLE 3 groundwater main contaminants
The scoring method was first based on the groundwater quality Standard (GB)T14848-2017) to evaluate each single component and classify the quality class of the component. Secondly, determining the evaluation score F of the single component of each category according to the specification of the table i When the standard value is not classified, the standard value is valued according to the V class and the standard value is not valued according to the I class.
TABLE 4 pollutant Classification Table
The overall evaluation score FI is then calculated according to the following formula:
in the formula: FI is the integrated score value of the i-zone (or component), dimensionless, F i Scoring for contaminants, n being the total number of contaminant classes; f iavg Is a score value F for zone i (or component) i Average value of (d), dimensionless; f imax Is a score value F for zone i (or component) i Maximum of (d), dimensionless; and finally, dividing the quality grade of the underground water according to the FI value and the specification of the following table.
TABLE 5 groundwater evaluation criteria
The stabilization analysis is carried out on the landfill site, the municipal domestic waste is also called Municipal Solid Waste (MSW), and the solid waste components can be divided into degradable components and non-degradable components. The degradable components can be classified into kitchen waste, paper, plastic, fabric, wood, and the like. The kitchen waste is high in degradation speed, and the degradation speed of paper, plastic, wood and the like is low. The non-degradable components can be divided into metal, glass, soil residue and the like.
Describing the stable state of the landfill from three aspects of the content of degradable components in MSW, the generation of landfill gas and the sedimentation of the landfill, and selecting three indexes as a stabilization evaluation system of the landfill.
(1) Degradation stabilization index Λ 1
Municipal solid waste is in a closed environment for a long time in a landfill, so anaerobic decomposition is the main degradation process of the landfill. During the decomposition process, a complex biodegradation process occurs such that the engineering properties of MSW change constantly over time. The cellulose decomposer in the degradable components accounts for more than 90 percent of the methane potential of the solid waste. Ratio of cellulose to lignin content (R) in solid waste C/L ) Reflecting the remaining degradable component, R, remaining in the landfill C/L The change of (2) directly reflects the result of hydrolysis reaction and can be used as the characterization index of the garbage degradation degree. The R of the municipal solid waste can be conveniently measured by drilling a landfill to obtain a waste sample and adopting a model fiber washing method C/L . Here by Λ 1 And defining the degradation stabilization index of the refuse landfill. Lambda 1 The calculation formula of (a) is as follows:
wherein R is C/L (t) C/L (kg/kg) of solid waste with landfill age t; r C/L (t 0) is C/L (kg/kg) of fresh solid waste. (2) Landfill gas stabilization index Λ 2
The main components of landfill gas are carbon dioxide and methane, so the collection of landfill gas helps to reduce global carbon emission and the methane can be used for combustion power generation and the like, and has important environmental and economic values. Since the landfill gas is a reaction product of the methanation process, and Volatile Fatty Acid (VFA) may be rapidly accumulated at an early stage of the stabilization of the landfill to suppress the generation of methane, it is important to separately study the generation of the landfill gas during the stabilization of the landfill.
Herein with Λ 2 Defining landfill gas stabilityIndex of quantification, Λ 2 The calculation formula of (a) is as follows:
wherein, lr and L 0 Residual value and initial value (L/kg) of landfill gas generation potential respectively; lt is the cumulative production of landfill gas per unit mass (L/kg) at time t.
(3) Sedimentation stabilization index lambda of landfill 3
Municipal solid waste is a highly compressed material, the compression of which results in vertical displacement of the landfill to 25-50% of the initial landfill height. The settling stabilization process of a closed landfill is significant to the integrity of landfill facilities such as cover systems, leachate collection and drainage systems, and landfill gas collection systems. Such vertical displacement, if managed properly, can result in a significant increase in the storage capacity of the landfill. Here use ^ 3 Defining the settlement stabilization index of landfill, lambda 3 The calculation formula of (a) is as follows:
wherein S is t The average settling amount (m) of the landfill at time t; s ∞ Is the final settling volume (m) of the landfill.
After the landfill is sealed, the stabilization of the landfill site increases with the increasing landfill age, and the trend of the three stabilization indexes is from 1 to 0. According to the simulation result obtained by simulating the stabilization process of the domestic garbage landfill unit by the landfill degradation-consolidation-solute migration coupling model, the garbage degradation process in the landfill can be judged according to the stabilization index.
(4) Introduction to coupling model
The model simulates complex liquid/gas migration, compression deformation and chemical solute migration behaviors in the landfill by adopting the constructed landfill degradation-consolidation-solute migration coupling model, and can be used for researching the stabilization process of the landfill from the scale of the landfill. The control equations of the coupling model comprise a mechanical balance equation considering the change of the compressibility of the garbage, a pore water and gas migration equation considering the degradation of water production percolate and landfill gas respectively, and a multi-component contained migration equation considering the degradation to generate chemical solutes:
in the formula: the solution variables of the coupling model comprise displacement u (m) and pore water pressure u w (Pa), pore pressure u a (Pa) and chemical solute (VFA and Methanobacterium) concentration c i (kg/m 3 )。
Each storage matrix in the above formula represents the mechanical characteristics of the municipal solid waste engineering considering degradation influence, and specifically includes: (1) Solid phase mass loss, percolate/landfill gas generation and VFA and methane bacteria concentration change source items in the degradation process; (2) The compression coefficient of the garbage under the coupling effect of stress and degradation; (3) And the water retention curve and the water vapor permeability characteristic of the garbage under the consideration of degradation influence.
P is a linear operator; b is physical strength (Pa); v. of w Pore water flow rate (m/s); n is a radical of a Is pore gas flux (mol/m) 2 S); r is an ideal gas constant (m) 3 Pa.K/mol); t is the temperature (K).
Wherein, the degradation stabilization index is Λ 1 According to formula Chinese item C c i Calculating and burying gas stabilization index Lambda 2 According to pore pressure u a Calculating the settlement stabilization index Lambda by combining the solution result with the gas migration boundary condition 3 And solving the result according to the displacement u.
Ontology (Ontology), which is a language technology emerging in recent years, has been applied in many fields. Ontology integrates specific individuals in the real world in a class form, and links various classes into a whole through logical relations and preset rules between the individuals to construct an Ontology. The ontology (ontology) can organically combine the dispersed target fields together to establish a unified knowledge base, and the related information of each entity is obtained through the relationship among each individual category and the preset semantic rule, so that related users can obtain the target information. However, in the current research on the ontology field, no relevant content is available about the stabilization evaluation of the landfill. At present, no overall comprehensive assessment method aiming at the stability of the landfill site in the ontology field exists, and the ontology model is mostly used in the aspects of agriculture, medicine, biology, economy and the like, and no related patent is used for assessing the stability of the landfill site. In consideration of the above factors, it is necessary to develop a system capable of comprehensively evaluating the stability of the landfill, so that the system can evaluate the stability of the landfill in all directions and at multiple angles, and provide reasonable suggestions for the subsequent construction and work of the landfill.
And introducing an Ontology framework, wherein the developed Ontology of the Ontology CA comprises a knowledge base, an Ontology Management System (Ontology Management System), a rule editing function and an inquiry function. The OntoCA body integrates a comprehensive suitability evaluation model, a pollution evaluation model and a stabilization evaluation model, and comprehensively evaluates the landfill.
The management system of the ontology provides for the writing of rules and the creation and updating of ontologies. Through rule editing, deductive reasoning capability of the development ontology can be realized. Through the query interface, a user can obtain the result after ontology inference by compiling a query language according to requirements. The Prot g é software plays an important role in the creation and reasoning of ontologies. The Prot g can realize the construction of ontology concept classes, relations, attributes and examples, and also provides a SWRLTab interface edited by SWRL rules and a SQWRLQueryTab interface of SQWRL query rules. The specific development process of the ontology is as follows: in the Prot g é software, a new ontology is developed according to the specified steps, and the existing semantic resources or ontologies can be reused. The development steps of the overall comprehensive assessment ontology of the landfill will be further explained below.
(1) Determining the Domain and scope of use of an ontology
At the beginning of the design of the ontology, it will be checked whether the developed ontology contains enough information to correct the missing and wrong information by proposing the basic problem and capability problem as shown in fig. 2.
(2) Obtaining base data
Basic data of a plurality of fields related to the stabilization assessment ontology of the landfill site are converted into OWL files through a construction platform (prot g e software) to be stored in a comprehensive database, and a data base is made for the established comprehensive knowledge base of the ontology.
The basic data comprises index weight and score of comprehensive suitability evaluation (the index weight is calculated according to an analytic hierarchy process, and the score is drawn according to a standard), the type and content of pollutants contained in the percolate (obtained by analyzing the composition of the percolate), the ratio of the content of cellulose and lignin in the solid waste (obtained by sampling the landfill and adopting a paradigm fiber washing method), landfill gas generation potential and sedimentation amount (obtained by simulating the stabilization process of the landfill through a finite element method).
(3) Defining classes and attributes of classes in an ontology model
The definition of the class is a basic step in the ontology development process, the definition of the class generally adopts a layer-by-layer inclusion mode, and the definition starts from three categories of comprehensive suitability evaluation, pollution evaluation and stabilization evaluation, and each parent class is refined to establish a corresponding subclass.
There are three types of properties in the ontology, namely object property, data property, and annotation property. ObjectProperty is used to define the relationships between classes and between classes, and between classes and numeric properties. And the annotationproperty may interpret some of the necessary data in text form.
Firstly, establishing comprehensive suitability evaluation, pollution evaluation and stabilization evaluation of father class. Subclasses were established under comprehensive suitability evaluation: engineering construction, operation management, ecological construction and general category; subclasses were established under contamination evaluation: chemical oxygen demand, permanganate index, total dissolved solids, total hardness, sulfate, chloride, fluoride, iodide, ammonia nitrogen, nitrite, nitrate, total phosphorus, iron, manganese, cadmium, chromium, lead, mercury, volatile phenol, trichlorobenzene, total bacteria, total coliform; subclasses were established under stabilization evaluation: degradation index, gas production index, sedimentation index. Establishing an evaluation standard class and defining the class. Establishing an integral grade class, wherein the subclasses of the integral grade class are a first class, a second class, a third class and a fourth class; establishing pollutant grades, the subclasses of which are excellent, good, moderate, poor and bad; establishing a degradation stabilization class, wherein the subclasses of the degradation stabilization class comprise a rapid degradation stage, a slow degradation stage and degradation stabilization; establishing landfill gas stabilization classes, wherein the subclasses of the landfill gas stabilization classes are a quick gas production phase, a slow gas production phase and gas production stabilization; and establishing a sedimentation stabilization class, wherein the subclass of the sedimentation stabilization class is a rapid sedimentation stage and sedimentation stabilization.
According to the simulation results and field test data obtained by simulating the stabilization process of the domestic garbage landfill unit by the landfill degradation-consolidation-solute migration coupling model, the garbage degradation process in the landfill can be judged according to the stabilization index, and can be defined by the similar 'equality to', and the specific judgment standard and the definition rule are as shown in the following table 6:
TABLE 6 rules for determining degree of stabilization
Note: because of the software display problem, A1, A2 and A3 in the rule are respectively Lambda 1 ，∧ 2 And ^ a 3 。
Object attributes and numerical attributes are established as shown in fig. 3. In the model, only one object attribute is established as has _ parts _ of, and the established numerical attributes are as follows: weights of engineering construction, operation management and ecological construction; designing service life, site selection, an anti-seepage system, a percolate inverting and treating system, rain and sewage diversion, landfill gas collection and treatment, a monitoring well, equipment configuration, incoming refuse inspection, weighing and metering, unit-dividing landfill, refuse paving and compaction, refuse dump, plant area elimination, flying object pollution control, operation management, percolate treatment, environmental monitoring and environmental influence, safety management, landscape coordination, and scoring and weighting of vegetation coverage; ratio (R) of cellulose to lignin of fresh solid waste and solid waste with landfill age t 0 And R T ) (ii) a Initial value of landfill gas generation potential and unit mass landfill gas cumulative yield (L) when landfill age is t 0 And L T ) (ii) a Average settling of the landfill at time t and final settling volume of the landfill (S) T And S U ) (ii) a A1, A2 and A3; FI. F iavg And F imax 。
(4) Individual creation
The individuals created in the class also have own hierarchical structure, and the definition of the individuals is carried out according to the following steps: (a) selecting a specified class and creating an individual name; (b) defining object property of the individual; (c) defining individual data properties. Individuals for comprehensive suitability assessment were established: EC (engineering construction), OM (operation management), ecological Construction (ECO), and overall index (overlap); establishing individuals for pollutant evaluation of Chemical Oxygen Demand (COD), permanganate index (PERMANGANATE), total soluble solids (DISSOLVED), total HARDNESS (HARDNESS), SULFATE (SULFATE), CHLORIDE (CHLORIDE), FLUORIDE (FLUORIDE), IODIDE (IODIDE), ammonia NITROGEN (NITROGEN), NITRITE (NITRITE), NITRATE (NITRATE), total PHOSPHORUS (PHOSPHORUS), IRON (IRON), MANGANESE (MANGANESE), CADMIUM (CADMIUM), CHROMIUM (CHROMIUM), LEAD (LEAD), MERCURY (MERCURY), volatile PHENOL (PHENOL), trichlorobenzene (TRICHLOR), total Bacteria (BACTERIAL), total COLIFORM group (COLIFORM); establish individuals for stabilization evaluation: t1, T2, T3, T4, T5, T6, T7, T8, ti being the ith time period (if it is necessary to calculate the stabilization index for more time periods, the creation of individuals may continue).
Defining the objectproperty of an individual: has _ parts _ of EC, has _ parts _ of ECO, has _ parts _ of OM are defined at object property associations of the individual overall index (OVERALLINDEX).
Defining the individual's dataproperty: the scores of each index of the engineering construction are manually input at the data performance associations of the individual EC, and the numerical type of the scores is float, as shown in fig. 4 in detail. The score of each index of the operation management, whose numerical type is float, is manually entered at the data performance associations of the individual OM. The scores of the various indicators of ecological construction, the numerical type of which is float, are manually entered at the data performance associations of the individual ECO. Manually input F at the data Property associations of each individual contaminant iavg And F imax The numerical type is float. Manually entering R at individual performance associations for each time period 0 ,R T ,L 0 ,L T ,S T ,S U (R 0 C/L, R of fresh solid waste T The carbon/L is C/L of solid waste with the landfill age of t; l is 0 Is an initial value of the landfill gas generation potential, L T Is the cumulative output of landfill gas per unit mass at time t; s T Average settling volume of landfill at time t, S U Final settlement of the landfill), the type of value is decimal, as shown in fig. 5.
(5) Landfill stabilization assessment rule establishment
The SWRL rules may represent the relationships of classes in an ontology and satisfy the computational requirements of the ontology. The ontology comprises a class atom, an individual attribute atom, a data value attribute atom and a built-in atom, and connection symbols are adopted among the atoms, wherein the connection symbols are ^ and? "represents variables, the pre-processing and the result are connected by" - > ", and mathematical calculations such as addition, subtraction, multiplication, division, evolution and the like can be carried out through the SWRL rule.
The SWRL rules are shown in tables 7 to 11, where table 7 is calculation of each index and total score of engineering construction in comprehensive suitability, table 8 is calculation of each index and total score of operation management in comprehensive suitability, and table 9 is calculation of each index, total score and overall score of comprehensive suitability for ecological construction in comprehensive suitability; table 10 is the calculation of FI values for each pollutant; table 11 shows the calculation of the degradation stabilization index, landfill gas stabilization index, and sedimentation stabilization index. And writing the SWRL rule through an SWRLTab interface contained in the Prot g.
TABLE 7 engineering construction related SWRL rules
Table 8 run management related SWRL rules
TABLE 9 ecological construction and overall score-related SWRL rules
Table 10 pollutant FI values dependent SWRL rules
TABLE 11 stabilization index-related SWRL rules
(6) Integrating running ontology models and generating reasoning data
Inputting the basic data into a model, editing the edited SWRL rule, clicking 'OWL + SWRL- > Drools' in an SWRLTab interface, integrating the constructed ontology model and the SWRL into a Drools language, clicking 'Run Drools' in the SWRLTab interface, operating the Drools language, clicking 'Drools- > OWL' in the SWRLTab interface, converting the Drools language into an OWL language, namely completing integration of the ontology model, and finally starting an inference engine, namely completing integration and operation of the ontology model to generate inference data and results.
(7) And inquiring the inferred indexes and each stabilization evaluation index according to the inquiry requirement, wherein the inquiry requirement comprises the grade and the weight of each element, the comprehensive suitability evaluation result of the landfill, the comprehensive evaluation value of underground water pollutants, the degradation stabilization index of municipal solid waste, the gas stabilization index of the landfill and the sedimentation stabilization index of the landfill.
After the ontology model is operated in the previous step, implicit relations and data of the ontology model are obtained, new facts and evaluation data are generated, and evaluators can input query sentences, query stability evaluation indexes, stabilization processes and the like. The relevant SQWRL query statements entered in the SQWRLTab plug-in are given below. Writing the SQWRL rule through an SQWRL Tab interface in the Prot g so as to compare the results inferred by the ontology, and inquiring and screening out the desired information.
TABLE 12SQWRL rules
Note: the SQWRL rule can be properly adjusted according to actual conditions, and the purpose of a user is met.
An existing landfill site is taken as an example to explain how to use Ontology to evaluate the stability of the landfill site, and the practicability of the Ontology of OntoCA is verified through the example. The sanitary landfill site is valley type landfill site with height of 70-80 m and landfill capacity of 4.9 x 10 7 m 3 . According to the planning, the design height of the landfill is extended to 120m, so it is necessary to evaluate the stability of the landfill. According to the above, the following 24 subclasses of three major father projects, operation management and ecological construction are scored according to CJJ/T107-2019 'harmless evaluation standard of household garbage landfill', the weight of each subclass is calculated by an analytic hierarchy process, and the scores and the weights of all elements are listed as the following table:
TABLE 13 comprehensive suitability evaluation index scores and weights
The type and content of the pollutants are then collated and concluded, the content of the pollutants in the landfill is not completely consistent with the following 22 contents, and if the content of the pollutants is not monitored, the column is not marked. The following table is a pollution rating table for landfill contaminants:
TABLE 14 contamination level
The landfill degradation-consolidation-solute migration coupling model is used for simulating and predicting the stabilization process of the domestic garbage landfill unit within the drilling depth range, and then a degradation stabilization index is obtained, the landfill gas stabilization index, the degradation and landfill stabilization index change with time is shown in figure 6, and the settlement stabilization index change with age is shown in figure 7:
the data obtained as described above is input to the already developed ontology model to be inferred, and a new fact is obtained, which is a comprehensive suitability evaluation inference interface as shown in fig. 8, a pollutant inference interface as shown in fig. 9, and a stabilization process inference interface as shown in fig. 10. Likewise, stability assessment indicators and related information can be queried in the SQWRL Tab plug-in through SQWRL statements, as shown in FIGS. 11-18.
The landfill grade can be defined based on the overall suitability evaluation score, and the inside of the landfill corresponding to the landfill grade is as follows:
when the stabilization degree of the landfill is four levels, the concentration of the percolate of the landfill is very high, and the settling rate of the site is high. At the moment, the leachate needs to be treated before being discharged, the landfill site can only be vegetated but can not be considered for other utilization, and meanwhile, non-workers and livestock and poultry are strictly forbidden to enter the landfill site.
When the stabilization degree of the landfill is three levels, the landfill leachate basically reaches the three-level discharge standard, and the site settlement rate is still high. At the moment, the leachate can be directly discharged to a sewage collecting pipeline without treatment, and the landfill site still cannot be considered for reuse.
When the stabilization degree of the landfill site is second grade, the leachate of the landfill site basically reaches the second grade discharge standard, and the sedimentation rate of the landfill site is lower. In this case, the leachate may be treated and discharged directly, and flowers and non-edible crops (e.g., cotton) may be planted in the landfill.
When the stabilization degree of the landfill is first grade, the landfill leachate basically reaches the first grade discharge standard, and the sedimentation rate of the landfill is very low. In this case, the leachate may be discharged without any treatment, and an unclosed structure may be constructed in the landfill site to be used as a general warehouse, or the landfill site may be modified to a park, a golf course, or the like.
According to the pollutant evaluation score, the quality level of the landfill leachate and each pollutant can be determined by comparing with the underground water evaluation standard, and whether the domestic garbage landfill in the area causes serious pollution to the surrounding underground water or not is determined. According to the quality level of each pollutant, implementing corresponding percolate treatment technology for the domestic landfill percolate, wherein the percolate treatment technology comprises the following steps:
the physical and chemical method is used for simply separating pollutants in the leachate, and the pollutants are generally used as a pretreatment environment in the leachate treatment process, so that ammonia nitrogen, high molecular substances, heavy metals and the like in the leachate can be removed;
biological treatment processes are commonly used early in landfill degradation. BOD in landfill degraded early landfill leachate 5 The ratio of the COD (the relative content of the biodegradable organic matters in the percolate) is higher, the biodegradability is better, the percolate is more suitable to be degraded by adopting a biological treatment method, and the BOD in the percolate is increased along with the increase of the landfill age 5 the/COD ratio is gradually reduced, and the biodegradability is reduced along with the reduction, so that the direct biological treatment is not suitable.
The biological treatment method includes an anaerobic treatment method and an aerobic treatment method. Anaerobic biological treatment is to convert organic matters into organic acids by using anaerobic microorganisms, and methane bacteria decompose the organic acids into methane, carbon dioxide, hydrogen and the like, such as anaerobic ponds, septic tanks, anaerobic digestion of sludge, anaerobic bioreactors and the like. The aerobic biological treatment adopts mechanical aeration or natural aeration (such as oxygen production by algae photosynthesis) to extract aerobic microorganisms in the sewageSupplying active energy, promoting the decomposition activity of aerobic microorganisms, and purifying sewage, such as activated sludge, biological filter, biological rotating disc, sewage irrigation and oxidation pond. Usually, the anaerobic treatment and the aerobic treatment are combined to treat percolate, and in the anaerobic stage, the anaerobic microorganisms convert organic matters with macromolecules, difficult degradation, long chain circularity and the like into organic matters with micromolecules, so that the BOD is improved 5 The ratio of COD to the ratio of COD improves the biochemical performance of the percolate, in an aerobic stage, aerobic microorganisms oxidize and decompose organic matters, organic nitrogen can be converted into nitrate-state ammonia through ammoniation and nitrification, and the nitrate-state ammonia flows back into an anoxic section through sludge to achieve the effect of denitrification.
An electrochemical oxidation method in which a substance is oxidized and decomposed into easily degradable substances, and an oxidation reaction occurs by direct oxidation of an electrode through absorption ions of a positive electrode; then releasing ions from the negative electrode to perform a reduction reaction, and effectively removing substances such as heavy metals in the ions; finally, the organic substance or the inorganic substance is degraded through indirect oxidation, so that the pollutants are converted into non-toxic substances.
According to the stabilization index of the landfill, the stabilization degree of the landfill can be judged, and corresponding processing modes can be adopted for different stabilization indexes and degrees to accelerate the stabilization of the landfill.
When the degradation stabilization index is larger than 0.4, leachate recirculation can be adopted to reduce the concentration of VFA in the rapid degradation stage so as to avoid forming an acidification environment to inhibit the generation of landfill gas. When in the slow degradation stage, anaerobic or aerobic regulation and control measures can be carried out to improve the degradation rate, such as mature leachate recirculation, leachate recirculation after temperature rise, sludge inoculation, ventilation and supply and the like; when the stabilization index of the landfill gas is larger than 0.4, namely a rapid gas production stage, the gas production stage is the best opportunity for collecting and utilizing the landfill gas, temporary covering is needed to be made, the landfill gas is prevented from being discharged randomly, and the collection efficiency of the landfill gas is improved. When in the slow gas production stage, the PH value and the water content in the landfill can be adjusted, the PH value in the landfill is controlled to be neutral and slightly alkaline, the water content is 40-50%, and the gas production rate is improved; when the sedimentation stabilization index is larger than 0.1, namely in a rapid sedimentation stage, reinforcement and anti-sedimentation treatment should be carried out on pipeline facilities in the pile body, and the sealing is favorable for maintenance of a sealing covering system in a period with a low sedimentation rate.
In conclusion, the comprehensive suitability evaluation score of the sanitary landfill is 7.9298, the grade of the landfill is two-grade, the harmless treatment requirement is basically met, the percolate can be considered to be directly discharged after being slightly treated, and meanwhile, flowers and inedible crops can be considered to be planted in the landfill; 17 FI values of main pollutants are more than 18.06, 6 FI values are less than 18.06, the average value of FI is as high as 49.69, and the leachate of the sanitary landfill site is seriously polluted and can not be directly discharged; the landfill leachate needs to be treated, and particularly, the chloride, heavy metal, ammonia nitrogen and trichlorobenzene in the leachate are subjected to key treatment. The leachate can be pretreated by a physical and chemical method in the early stage of the landfill, and then the landfill is subjected to anaerobic-aerobic regulation and control in combination, so that the content of pollutants in the leachate is effectively treated, and the effect of accelerating and stabilizing the landfill is achieved.
The beneficial effects of the whole are as follows: the invention provides a comprehensive evaluation method for the whole landfill site, which is characterized in that a landfill site evaluator inputs basic data through a developed ontology model, operates the ontology model, and can quickly obtain evaluation indexes of the stability of the landfill site according to a reasoning machine and a preset semantic rule, such as comprehensive suitability evaluation score, pollutant evaluation index, landfill site degradation stabilization evaluation index, landfill gas stabilization evaluation index, settlement stabilization evaluation index and the like. Related personnel can check the deduced result, so that the current situation of the sanitary landfill site can be comprehensively known, then suggestions are provided for the construction management and the ecological environment of the landfill site, the utilization rate, the safety and the economic applicability of the landfill site are improved, and a scheme is drawn up for the expansion and the repair of the landfill site.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A comprehensive evaluation method for the whole landfill site is characterized by comprising the following steps,
the method comprises the steps of firstly, constructing a comprehensive suitability evaluation model to carry out comprehensive suitability evaluation on the landfill, and obtaining elements influencing the comprehensive suitability evaluation of the landfill, wherein the elements are divided into three types of engineering construction, operation management and ecological construction, the engineering construction comprises eight elements including design service life, site selection, an anti-seepage system, a percolate inverting and treating system, rain and sewage diversion, landfill gas collection and treatment, a monitoring well and equipment configuration, the operation management comprises eleven elements including site entering refuse inspection, weighing and metering, unit landfill, refuse spreading and compaction, refuse dump bodies, plant area disinfection, flying object pollution control, operation management, percolate treatment, environmental monitoring and environmental influence and safety management, the ecological construction comprises two elements including landscape coordination and vegetation coverage,
calculating the weight of all elements based on an analytic hierarchy process, and calculating a comprehensive suitability evaluation result of the landfill according to the score and the weight of each element of the landfill;
constructing a pollution evaluation model to evaluate the pollution of the landfill, wherein the pollution evaluation model comprises the steps of analyzing the components of the percolate to determine the main pollutants and the content of the main pollutants in the groundwater of the landfill, determining the quality category and the grade of the main pollutants in the groundwater of the landfill based on a groundwater quality grading method, calculating the comprehensive evaluation value of the groundwater pollutants, and determining the quality grade of the groundwater according to the comprehensive evaluation value;
thirdly, constructing a stabilization evaluation model to carry out stabilization evaluation on the landfill, comprising constructing a landfill degradation-consolidation-solute migration coupling model, calculating a degradation stabilization index, a landfill gas stabilization index and a landfill settlement stabilization index of the municipal solid waste according to the landfill degradation-consolidation-solute migration coupling model,
and step four, developing an OntoCA body, wherein the developing OntoCA body comprises the steps of obtaining basic data, defining classes and class attributes in the body model, creating individuals, establishing landfill assessment rules, integrating the operation body model and generating inference data, inquiring from the inference data according to inquiry requirements, and obtaining inquiry results.
2. The method for comprehensive evaluation of the whole landfill site according to claim 1, wherein the calculating the weight of all the elements based on the analytic hierarchy process includes,
1a, regarding the weight of the stabilization integrity of the refuse landfill as A, and regarding the weight of the engineering construction as B 1 The weight of the operation management is B 2 The weight of ecological construction is B 3 The weight of the design service life is C 1 The weight of the selected address is C 2 The weight of the impermeable system is regarded as C 3 The weight of the percolate reverse-discharging and treating system is regarded as C 4 The weight of the rain and sewage flow is regarded as C 5 The weight of the landfill gas collection treatment is regarded as C 6 The weight of the monitoring well is regarded as C 7 The weight of the device configuration is considered to be C 8 The weight of the incoming garbage inspection is regarded as C 9 The weight of the weighing meter is regarded as C 10 The weight of the unit-by-unit landfill is C 11 The weight of spreading and compacting the garbage is regarded as C 12 The weight of the garbage heap is regarded as C 13 The weight of factory killing is regarded as C 14 The weight of the pollution control of the flying object is regarded as C 15 The weight of the operation management is C 16 The weight of leachate treatment is regarded as C 17 The weight of environmental monitoring and environmental impact is C 18 The weight of security management is C 19 The weight of the landscape harmony is C 20 The weight of vegetation coverage is C 21 ，
1B, structures A and B 1 、B 2 、B 3 A-B judgment matrix, calculating the consistency index value of the A-B judgment matrix, and when the first threshold value is met, calculating B 1 、B 2 、B 3 The weight of (a) is determined,
1c, structure B 1 And C 1-8 B between 1 -C 1-8 Judging the matrix, calculating B 1 -C 1-8 Judging the consistency index value of the matrix, and calculating C when the consistency index value meets a first threshold value 1 、C 2 、C 3 、C 4 、C 5 、C 6 、C 7 、C 8 The weight of (a) is determined,
1d, structure B 2 And C 9-19 B between 2 -C 9-19 Judging the matrix, calculating B 2 -C 9-19 Judging the consistency index value of the matrix, and calculating C when the consistency index value meets a first threshold value 9 、C 10 、C 11 、C 12 、C 13 、C 14 、C 15 、C 16 、C 17 、C 18 、C 19 The weight of (a) is determined,
1e, structure B 3 And C 20-21 B between 3 -C 20-21 Judging the matrix, calculating B 3 -C 20-21 Judging the index value of the consistency of the matrix, and calculating C when the index value meets a first threshold value 20 、C 21 The weight of (c).
3. The overall evaluation method for the landfill site according to claim 1, wherein the calculating the comprehensive assessment score of the pollutant includes calculating the comprehensive assessment score according to formula (1),
wherein, F iavg Scoring F for contaminants in the ith contaminant class i Average value of (1), F i Is scored for contaminants, n is the total number of contaminant classes, F imax Scoring F for contaminants in the ith contaminant class i Maximum value of (d); FI is the comprehensive assessment score for the contaminants.
4. The overall comprehensive evaluation method for the landfill site according to claim 1, wherein the constructing the landfill site degradation-consolidation-solute migration coupling model comprises establishing the landfill site degradation-consolidation-solute migration coupling model according to the formulas (3), (4), (5) and (6),
wherein u represents displacement, u w Indicates pore water pressure u a Indicates pore pressure and chemical solute concentration c i ，
For a net stress vector, P is a linear operator, and>
coefficient matrices corresponding to the increment of framework strain due to the net stress increment, S t Changing a coefficient matrix corresponding to the framework strain increment caused by the deformation resistance of the framework for biochemical reaction, b is a physical vector,
v w is the seepage velocity vector (m) of pore waterS), R is a gas state constant (m) 3 K/mol), T is the gas temperature (K), na is the total flux of pore gases, D i Is a molecular diffusion/mechanical diffusion coefficient matrix of the ith solute, C ua ，C uw ，C uu ，C wa ，C ww 、C w And C wu 、C aa 、C a 、C aw 、C au1 、C au2 、/>
Are operator matrices with respect to spatial coordinates, and t is time.
5. The method for comprehensive overall evaluation of a landfill according to claim 1, wherein the calculating the degradation stabilization index, the landfill gas stabilization index, and the landfill settlement stabilization index of the municipal solid waste includes calculating the degradation stabilization index according to formula (7), the landfill gas stabilization index according to formula (8), the landfill settlement stabilization index according to formula (9),
wherein Λ is 1 Is the degradation stabilization index of the refuse landfill, Λ 2 For landfill gas stabilization index ^ 3 Is the landfill settlement stabilization index, R C/L (t) is the age of landfillThe ratio of the cellulose to lignin contents, R, in the solid waste of period t C/L (t 0) is the ratio of the cellulose to lignin content in the fresh solid waste, lr and L 0 Respectively, the residual value and the initial value of the landfill gas generation potential, lt is the unit mass landfill gas cumulative yield at time t, S t The average settling volume of the landfill site at time t; s. the ∞ Is the final settling volume of the landfill.
6. The comprehensive evaluation method for the whole landfill site according to claim 1, wherein the step four includes,
(1) Acquiring basic data, specifically comprising the steps of acquiring the scores and weights of all elements of the landfill site in the step one, the main pollutants and the content of the main pollutants in the groundwater of the landfill site in the step two, calculating the ratio of the content of cellulose and lignin in the solid wastes required by the degradation stabilization index of the municipal solid wastes in the step three, calculating the landfill gas generation potential required by the gas stabilization index of the landfill site and calculating the sedimentation amount required by the sedimentation stabilization index of the landfill site,
(2) Defining classes and attributes of the classes in the ontology model, and specifically establishing a parent class and a child class, wherein the parent class comprises a comprehensive suitability evaluation class, a pollution evaluation class, a stabilization evaluation class and an evaluation standard class, and the evaluation standard class comprises an integral grade class, a pollutant grade class, a degradation stabilization class, a landfill gas stabilization class and a sedimentation stabilization class;
(3) Establishing subclasses under the comprehensive suitability evaluation class according to factors influencing the comprehensive suitability evaluation of the landfill, establishing subclasses under the pollution evaluation class according to the pollutant class, establishing subclasses under the stabilization evaluation class according to the factors influencing the stabilization evaluation of the landfill, and establishing subclasses according to the attributes of various classes in the evaluation standard class;
(4) Creating the individual comprises selecting a specified class to create an individual name, and defining the object attribute and the data attribute of the individual;
(5) Establishing a landfill assessment rule, specifically comprising establishing calculation rules of all elements and total scores of engineering construction, operation management and ecological construction in comprehensive suitability evaluation, and calculation rules of overall scores of comprehensive suitability, establishing calculation rules of comprehensive evaluation scores of all pollutants, and establishing calculation rules of degradation stabilization indexes, landfill gas stabilization indexes and landfill settlement stabilization indexes;
(6) Integrating the operation ontology model and generating inference data, wherein basic data and rules are input into the model for integration to generate inference data;
(7) And inquiring from the reasoning data according to inquiry requirements and acquiring inquiry results, wherein the inquiry requirements comprise the grade and the weight of each element, the comprehensive suitability evaluation result of the landfill, the comprehensive evaluation value of underground water pollutants, the degradation stabilization index of municipal solid waste, the gas stabilization index of the landfill and the sedimentation stabilization index of the landfill.
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