CN102494722B - Greenhouse gas emission monitoring method of town household refuse disposal system - Google Patents

Abstract

The invention discloses a greenhouse gas emission monitoring method of a town household refuse disposal system. By monitoring methane gas and refuse components and revising the refuse components, degradable organic carbon content, proportion of methane in refuse landfill gases, a half-life period and the like, the greenhouse gas emission monitoring method puts forward selection principles of the parameters under different conditions selectively, performs connection on instruments on site and upper computer working stations and is capable of updating data in real time. The greenhouse gas emission monitoring method reduces monitoring cost, is stable in monitoring results and high in accounting accuracy.

Description

A kind of greenhouse gas emission monitoring method of town household refuse disposal system

Technical field

The present invention relates to greenhouse gas emission field, particularly a kind of greenhouse gas emission monitoring method of town household refuse disposal system.

Background technology

Greenhouse gases (GHG) discharge of the municipal solid wastes such as house refuse (MSW) in processing procedure is the important sources of greenhouse gases.For formulating house refuse reduction of greenhouse gas discharge strategy targetedly, Chinese scholars has been studied the greenhouse gas emission rule of the Different treatments such as landfill, burning, and adopt respectively the recommend method of cycle assessment method (LCA), Intergovernmental Panel on Climate Change (IPCC), and the accounting method based on Clean Development Mechanism (CDM), Prediction for Solid Waste Treatment Technology and whole disposal system are carried out to greenhouse gas emission accounting and analysis.

Iff adopting Accounting Model, according to model parameter default value measuring and calculating greenhouse gas emissions, because the object of adjusting is complicated and changeable, the air pressure facing, temperature and constituent are different, can not reflect the true greenhouse gas emissions of adjusting object merely according to parameter default value; If only depend on Monitoring Data, determine discharge capacity, because house refuse composition is totally different, the data difference that different sampled points gather is huge, and monitoring is subject to nature, artifical influence factor is numerous, monitoring result is unstable, and if it is higher to want to obtain the monitoring cost that precise information needs.So more satisfactory method is to determine the parameter in Accounting Model in conjunction with Monitoring Data, especially when selecting emission factor, will be as much as possible by investigating on the spot or monitoring, obtain accurately reflecting the emission factor of application of city life garbage discharge characteristics under different condition, then according to Accounting Model, simulate process and the quantity of greenhouse gas emission.

The monitoring method of greenhouse gases comprises at present: model assessment method, flux box method and micrometeorology method etc.Model assessment method principle is according to the concentration gradient of difference alternate (water-gas) gas componant and uses Fick law to carry out estimated flux, and it is generally only applicable to the flux estimation of water-aerosphere face.The cost of flux box method is low, easy to operate, highly sensitive, is the common method of Greenhouse.Compare with flux box method, micrometeorology method is a kind of open measuring method, is used for the measurement research of Lu Sheng ecologic environment greenhouse gases, and it surveys gas flux value is the mean value that (is generally 100～1000m) within the scope of larger space.

For the feature of city refuse landfill aerogenesis, conventionally select flux box method to monitor.But flux casing has disturbance to object of observation, inside and outside case, have that certain pressure is poor, a temperature difference etc., make test and actual conditions have the situation that necessarily departs from.Flux box method comprises static chamber and dynamic case, development from static chamber to dynamic case has overcome the problems referred to above to a certain extent, but dynamically case itself also has certain defect: on the one hand, dynamically box body balanced flow will disturb interfacial gases transmission, on the other hand, in the situation that emission flux of gas is lower, the tested gas concentration difference of the outlet of casing and porch is very little, thereby require there is very high measuring accuracy, otherwise can cause larger measuring error.

Inventor finds in realizing process of the present invention, at least has following shortcoming and defect in prior art:

The cost of monitoring method of the prior art is high, monitors suffered influence factor complexity, and monitoring result is unstable etc., and the accuracy of impact accounting.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of greenhouse gas emission monitoring method of town household refuse disposal system, and the method has reduced the cost of monitoring, and monitoring result accuracy stable and that adjust is higher, described below:

A greenhouse gas emission monitoring method of town household refuse disposal system, said method comprising the steps of:

(1) from the different rubbish of the 6 classes source that produces, gather respectively monitoring sample, obtain the content of organic carbon, and using the content typing host computer workstation of organic carbon as parameter;

(2) when in the landfill operation stage and without methane collection system, take step as unit, realize the landfill of rubbish, adopt static chamber method to monitor methane content, by methane gas analyser three ground, gather sequential control system and obtain the first methane content;

(3) when in the closing stage and without described methane collection system, natural pressure and methane content initial value in the landfill gas of all experiment wells of pre-test of bleeding, gas collection well is bled and measured bleed negative pressure and landfill gas composition, pressure and composition in monitor well monitoring landfill gas changes simultaneously, setting pressure probe, determine the coverage of bleeding, described methane gas analyser three ground gather sequential control system and obtain the second methane content according to pressure and composition;

(4) when having described methane collection system, use flue gas analyzer to monitor collecting well methane concentration, by described methane gas analyser three ground, gather sequential control system and obtain leucoaurin content;

(5) described the first methane content, described the second methane content or described leucoaurin content are sent to described host computer workstation by data service center, by described host computer workstation, obtain the gas production rate of unit weight rubbish within the unit interval;

(6) adopt single order evanescent mode, according to the content of described organic carbon, described the first methane content, described the second methane content and described leucoaurin content, obtain the discharge capacity of methane;

(7) according to the content of described organic carbon, obtain CO ₂and N ₂the discharge capacity of O;

(8) described host computer workstation is to the discharge capacity of described methane, described CO ₂and N ₂the discharge capacity of O is processed, and obtains data and curves figure;

Wherein, optional step (2) in the refuse landfill landfill process without described methane collection system, optional step (3) after closing, and in the refuse landfill that has described methane collection system omnidistance optional step (4).

The discharge capacity of described methane is specially:

Adopt single order evanescent mode, the discharge capacity of described methane:

E _CH4＝DDOC _mdecompT×F×16/12

E _cH4cH for T landfill municipal solid wastes ₄discharge capacity, unit is ton; DDOC _mdecopTdDOC for T decomposition _m; F is the CH in the refuse landfill gas producing ₄ratio; 16/12 is CH ₄/ C molecular weight ratio;

The T DDOC that the year end, sanitary land fill was accumulated _m:

DDOC _maT＝DDOC _mdT+(DDOC _maT-1×e ^-k)

The DDOC that T decomposes _m:

DDOC _mdecompT＝DDOC _maT-1×(1-e ^-k)

T is the inventory time; DDOC _maTunit is ton; DDOC _maT-1the DDOC accumulating for T-1 terminal hour sanitary land fill _m, unit is ton; DDOC _mdTfor T deposit to sanitary land fill DDOC _m, unit is ton; K is reaction constant, k=ln (2)/t _1/2, unit is year, t _1/2for time half life period, wherein, described time half life period according to described unit weight rubbish the gas production rate within the unit interval determine.

Described CO ₂discharge capacity:

$E_{{\mathrm{CO}}_2}=\mathrm{MSW}\×\underset{j}{\mathrm{\Σ}}({\mathrm{WF}}_j\×{\mathrm{dm}}_j\×{\mathrm{CF}}_j\×{\mathrm{FCF}}_j\×{\mathrm{OF}}_j)\×44/12$

for burning the CO of municipal solid wastes ₂discharge capacity, unit is ton; WF _jnumber percent for ingredient j in solid waste; Dm _jfor the dry matter percentage in ingredient j; CF _jratio for total carbon in the dry of ingredient j; FCF _jfor the ratio of mineral carbon in total carbon; OF _jfor oxidation factor, get 100%; 44/12 is CO ₂/ C molecular weight ratio.

Described N ₂the discharge capacity of O:

$E_{N_{2}O}=\mathrm{MSW}\×{\mathrm{EF}}_{N_{2}O}\×{10}^{-6}\×{\mathrm{GWP}}_{N_{2}O}$

for burning municipal solid wastes discharge N ₂the CO2 emission equivalent that O produces, unit is ton; The municipal solid wastes quality of MSW for burning, unit is ton;

for N ₂the emission factor of O; GWP _n2Ofor N ₂greenhouse effect and CO that O produces ₂the multiple of comparing, gets 310.

Described method also comprises: the indirect discharge capacity to upstream and downstream is monitored,

The indirect discharge capacity of upstream comprises: upstream activity level and emission factor multiply each other and obtain CO ₂discharge capacity; Wherein, described activity level is specially: the energy-output ratio and the power consumption that in transportation rubbish process, consume;

The indirect discharge capacity in downstream comprises: from output electric weight to CO ₂cER monitor, be specially: after domestic rubbish disposal, externally the electric weight of output is multiplied by the CO of local generating ₂average emission coefficient, the CO of described local generating ₂average emission coefficient is line-based emission factor, is the weighted mean of electric weight limit emission factor and capacity limit emission factor.

A kind of greenhouse gas emission monitoring method of town household refuse disposal system provided by the invention, compared with prior art has advantages of as follows:

The present invention is by methane gas and waste component are monitored, to the CH in component of refuse, Degradable organic carbon content, refuse landfill gas ₄ratio and half life period etc. revise, and bring forward the selection principle of above-mentioned parameter under different condition, and field instrument and host computer workstation are contacted, can real-time update data; The present invention has reduced the cost of monitoring, and monitoring result accuracy stable and that adjust is higher.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of urban household waste treatment system greenhouse gas emission monitoring provided by the invention.

Embodiment

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.

Present Domestic all lacks the standard for Greenhouse method outward, and lacks especially for the standard monitoring method of domestic waste greenhouse gas emission, in the urgent need to formulating a set of standard monitoring index and method in conjunction with the object of adjusting.To monitor and adjust unification, setting up a set of monitoring Accounting System for domestic waste Different treatments.

In order to reduce monitoring account cost, utilize minimum monitoring index to improve accuracy, whole greenhouse gas emission monitoring method of town household refuse disposal system is comprised of three parts, according to technical requirement, field layer gathers the signals such as Degradable organic carbon massfraction, natural pressure and methane content that under different condition, monitoring obtains and sends to data acquisition station.Data acquisition station is done rough handling to acquired original data, adopts Industrial Ethernet mode that all data high-speeds are sent to host computer workstation.Host computer workstation calculates the reduction of greenhouse gas discharge amount of landfill and two kinds of processing modes of burning by the parameter of artificial setting and the data parameters collecting with method provided below.Host computer workstation deposits the data after calculating in database in and preserves in real time.

House refuse produces greenhouse gases and is mainly methane, after garbage loading embeading, activity due to microorganism, degradable organic component in rubbish is decomposed gradually, and this process can roughly be divided into double teacher: Hydrolysis/Aerobic degradation period, hydrolysis/fermentation stage, souring stage, product methane phase and oxidation stage.CH in rubbish ₄discharge is based on single order damped system, and the method hypothesis, at CH ₄and CO ₂in the many decades forming, (Degradable organic carbon, DOC) decay is very slow for the degradable organic principle in discarded object.If condition is constant, CH ₄generation rate depends on the carbon content of discarded object completely.So in the initial several years after deposition, the CH of the generation of waste materials depositing at disposal site ₄discharge capacity is the highest, and along with Degradable organic carbon in discarded object is consumed by bacterium (causing decay), this discharge capacity also declines gradually.As can be seen here, referring to Fig. 1, the production process of methane is main relevant with the half life period of degraded with the content of Degradable organic carbon in rubbish, and the half life period is mainly subject to the impact of refuse composition, landfill condition and meteorological condition, and the half life period can be determined by the gas production rate in the monitoring unit interval.

101: from the different rubbish of the 6 classes source that produces, gather respectively monitoring sample, obtain the content of organic carbon, and using the content typing host computer workstation of organic carbon as parameter;

Wherein, this step is specially: monitoring sample should gather respectively from the different rubbish of the 6 classes source that produces, and these sampled points comprise shopping centre, resident living area, cause district, sweeping area, special section and mixed zone.After mensuration rubbish unit weight, bulk refuse breaking to particle diameter is less than to the fritter of 50mm, fully mixed stirring that pave in cement flooring, then use inquartation division 2 (or 3) inferior to 25-50kg sample, be placed in closed container and transport to analysis place.The determination and analysis method of monitoring sample carbon content adopts the Outside Heating Method in potassium bichromate titrimetric method.Under the condition of external heat, (oil bath temperature is 180 ℃, seethe with excitement 5 minutes), with organic carbon in certain density potassium dichromate-sulfuric acid solution oxidation sample, remaining potassium dichromate carrys out titration with ferrous sulphate, from consumed potassium dichromate amount, the content that calculates organic carbon, is entered into host computer workstation as parameter using the content of its organic carbon.

102: when in the landfill operation stage and without methane collection system, take step as unit, realize the landfill of rubbish, adopt static chamber method to monitor methane content, by methane gas analyser three ground, gather sequential control system and obtain the first methane content;

Wherein, this step is specially: landfill operation be take step as unit, every 1 about 12.5m of bench height; Divide two-layer landfill, every 1 layer height is 6.0m, the about 30cm of middle earthing bed thickness.After completing the landfill of 1 step, carry out end covering, the about 1m of overburden layer thickness, grade of side slope 1: 3.By static chamber method, carry out methane content monitoring, sample tap and temperature-measuring port are established in static chamber top, and fixed part is embedded in overburden layer, during test, static case lid are inserted in water sealed tank to water filling sealing.Respectively 0,10,20,30 and 40min from gas sample mouth, sample; Static the temperature inside the box is recorded in sampling simultaneously, with correcting gas concentration.In gas sample, the volume fraction of methane is tested with gas chromatographic analysis.

103: when in the closing stage and without methane collection system, natural pressure and methane content initial value in the landfill gas of all experiment wells of pre-test of bleeding, gas collection well is bled and measured bleed negative pressure and landfill gas composition, pressure and composition in monitor well monitoring landfill gas changes simultaneously, setting pressure probe, determine the coverage of bleeding, methane gas analyser three ground gather sequential control system and obtain the second methane content according to pressure and composition;

The experimental method of taking to bleed is measured, the experiment of bleeding is divided into static experiment and two stages of dynamic experiment, static experiment process comprises: at the natural pressure of the landfill gas of all experiment wells of pre-test of bleeding, dynamic experiment adopts at gas collection well and bleeds and measure bleed negative pressure and landfill gas composition, and pressure and the composition in monitor well monitoring landfill gas changes simultaneously.Experiment comprises three parts: maximum extraction flow and the suction pressure of first for measure when many mouthfuls of gas collection wells are bled simultaneously; Second portion is maximum extraction flow and the suction pressure of the independent test set gas well of difference; Third part is monitored the static pressure of each well before testing for starting in every day to bleed.The gas flow of gas collection well and suction pressure are substantially linear, and the size of its ratio is relevant with landfill thickness with the landfill time of location rubbish,, by setting pressure, pop one's head in meanwhile, determine the coverage of bleeding.

104: when having methane collection system, use flue gas analyzer to monitor collecting well methane concentration, by methane gas analyser three ground, gather sequential control system and obtain leucoaurin content;

Wherein, this step is specially: use flue gas analyzer to monitor collecting well methane concentration.Collecting cross section, well exit increase test sample device section, from test sample device section lower end and the junction air inlet of collecting well, give vent to anger and input collection tube etc. in upper end, and test sample mouth and temperature mouth are set in side.It is that example describes that flue gas analyzer in the embodiment of the present invention adopts moral figure testo350pro flue gas analyzer, and during specific implementation, the embodiment of the present invention does not limit this.Flue gas probe and the design of temp probe (K type) model size in conjunction with moral figure testo350pro flue gas analyzer can closed test sample mouth and temperature mouths.During measurement, testo350Pro flue gas analyzer is connected with dynamic case, directly carries out field monitoring, convenient and swift, the error of avoiding sample collection, transportation to bring.Moral figure testo350Pro is furnished with various flow sensors, can measure the Gas Parameters of various gases, can measure 6 kinds of parameters at most simultaneously.Also can measure differential pressure, calculate flue gas flow rate/flow, and various gas flue gas annual emissions.The long 700mm of flue gas probe of standard configuration, 500 ℃ of heatproofs.Monitoring the data obtained can transmit by data-interface.

Flow sensor configuration is as follows: the flow sensor in the embodiment of the present invention adopts imported with original packaging intelligent vortex shedding flowmeter, be total to quadruplet, gauge outfit has liquid crystal display instantaneous delivery and integrated flow, and instantaneous delivery is pressed range output 4-20MA current signal to flow totalizer meter, precision 0.5%.

Wherein, the three ground collection sequential control systems of the methane gas analyser in the embodiment of the present invention can be realized a set of gas analyzer and gather three ground gas CH ₄concentration, the cost of reducing investment outlay, this system adopts Siemens S7 series PLC to control, the CH of the house steward of its collection, power generation pipeline, torch pipeline ₄concentration signal is by realizing continuous coverage, the wherein CH of power generation pipeline to the sequential control of zero-pressure solenoid valve (set point or reference input signal be table execution control on schedule automatically) ₄concentration signal is exported to genset by signal sub power distribution orchestration and is controlled for unit.

Flow totalizer meter adopts imported with original packaging WP series integrating instrument, and it can collecting temperature, pressure and flow signal, and instantaneous delivery and integrated flow are the mark condition flow after temperature pressure compensation.

Wherein, step 102 to the execution sequence of step 104 is to select to carry out according to the actual conditions of refuse landfill, optional step 102 in the refuse landfill landfill process without methane collection system, optional step 103 after closing, and in the refuse landfill that has methane collection system omnidistance optional step 104.

105: the first methane content, the second methane content or leucoaurin content are sent to host computer workstation by data service center, by host computer workstation, obtain the gas production rate of unit weight rubbish within the unit interval;

Wherein, this step is specially: by the rubbish total amount that produces detected gas, by host computer workstation, can calculate the gas production rate of unit weight rubbish within the unit interval, the gas production rate in this unit interval is for imitating the value of core garbage degradation half life period.

106: adopt single order evanescent mode, according to the content of organic carbon, the first methane content, the second methane content and leucoaurin content, obtain the discharge capacity of methane;

Adopt single order decay (FOD) pattern, and in conjunction with actual, the Monitoring Data of methane gas and waste component and correlative study achievement are revised its default parameter, bring forward the selection principle of parameter under different condition, the method for specifically calculating methane emission is:

CH ₄calculating:

E _CH4＝DDOC _mdecompT×F×16/12 (1)

In formula (1): E _cH4cH for T landfill municipal solid wastes ₄discharge capacity, unit is ton; DDOC _mdecopTdDOC for T decomposition _m, its computing method are shown in formula (2), (3) and (4) below; F is the CH in the refuse landfill gas producing ₄ratio, determines in conjunction with investigation and actual monitoring data; 16/12 is CH ₄/ C molecular weight ratio.

In first kernel response, result quantities is proportional with reaction material quantity all the time.Waste material be deposited on sanitary land fill time and the annual CH producing ₄amount is irrelevant, only with the decomposing material gross mass in place was relevant at that time.If know initial time sanitary land fill in the quantity of decomposing material, each year all can be considered the First Year in evaluation method, completing that basic single order calculates can adopt this two simple formula, and decay reaction starts from depositing the January 1 of that year afterwards.

The T DDOC that the year end, sanitary land fill was accumulated _m:

DDOC _maT＝DDOC _mdT+(DDOC _maT-1×e ^-k) (2)

The DDOC that T decomposes _m:

DDOC _mdecompT＝DDOC _maT-1×(1-e ^-k) (3)

In formula (2) and (3): T is the inventory time; DDOC _maTfor the T DDOC that the year end, sanitary land fill was accumulated _m, unit is ton; DDOC _maT-1for (T-1) DDOC that terminal hour sanitary land fill is accumulated every year _m, unit is ton; DDOC _mdTfor T deposit to sanitary land fill DDOC _m, by the content of Degradable organic carbon and the rubbish total amount of T landfill that monitoring obtains, multiplying each other and can obtain, unit is ton; K is reaction constant, k=ln (2)/t _1/2, unit is year, t _1/2for time half life period, wherein, time half life period according to unit weight rubbish the gas production rate within the unit interval determine.

In single order evanescent mode, the half life period of garbage degradation is the key parameter that affects landfill gas change of production trend, and the span that pattern is recommended is 5～10 years (a represents year), can be according to the CH of experimental monitoring gained ₄gas yield is checked the concrete numerical value that the garbage degradation half life period should get.

107: according to the content of organic carbon, obtain CO ₂and N ₂the discharge capacity of O;

CO in waste incineration ₂calculating:

$E_{{\mathrm{CO}}_2}=\mathrm{MSW}\×\underset{j}{\mathrm{\Σ}}({\mathrm{WF}}_j\×{\mathrm{dm}}_j\×{\mathrm{CF}}_j\×{\mathrm{FCF}}_j\×{\mathrm{OF}}_j)\×44/12---\left(4\right)$

In formula (4):

for burning the CO of municipal solid wastes ₂discharge capacity, unit is ton; WF _jfor the number percent of ingredient j in solid waste, according to the data of investigation and actual measurement, obtain; Dm _jfor the dry matter percentage in ingredient j; CF _jratio for total carbon in the dry of ingredient j; FCF _jfor the ratio (total carbon remove degradable organic carbon DOC) of mineral carbon in total carbon; OF _jfor oxidation factor, get 100%; 44/12 is CO ₂/ C molecular weight ratio.

N in waste incineration ₂the calculating of O:

$E_{N_{2}O}=\mathrm{MSW}\×{\mathrm{EF}}_{N_{2}O}\×{10}^{-6}\×{\mathrm{GWP}}_{N_{2}O}---\left(5\right)$

In formula (5):

for burning municipal solid wastes discharge N ₂the CO2 emission equivalent that O produces, unit is ton; The municipal solid wastes quality of MSW for burning, unit is ton;

for N ₂the emission factor of O, gets IPCC default value 50gN ₂o/ ton municipal solid wastes; GWP _n2Ofor N ₂greenhouse effect and CO that O produces ₂the multiple of comparing, gets 310.

108: host computer workstation is to the discharge capacity of methane, CO ₂and N ₂the discharge capacity of O is processed, and obtains data and curves figure.

Wherein, on data and curves figure, can directly find out discharge capacity, the CO of methane ₂and N ₂the discharge capacity of O, has facilitated the multiple needs in practical application.

Wherein, in order to access the CO of garbage disposal Life cycle ₂discharge capacity, the embodiment of the present invention also comprises the indirect discharge capacity of upstream and downstream.

Upstream comprises: upstream activity level and emission factor multiply each other and obtain CO ₂discharge capacity.Wherein, activity level is specially: the energy-output ratio and the power consumption that in transportation rubbish process, consume.Adopt default value and the Chinese regional power grids line-based emission factor of the fossil energy greenhouse gas emission factor that IPCC provides, activity level and emission factor are multiplied each other and obtain the CO in this stage ₂discharge capacity.

Downstream comprises: from output electric weight to CO ₂cER monitor, output electric energy has reduced the carbon emission amount of common generating, the CO that has offset the part in garbage disposal ₂discharge capacity.Be specially: after domestic rubbish disposal, externally the electric weight of output is multiplied by the local CO generating electricity ₂average emission coefficient.The CO of local generating ₂average emission coefficient is line-based emission factor, should be electric weight limit emission factor (EF _{grid, OM, y}) and capacity limit emission factor (EF _{grid, BM, y}) weighted mean, claim again combination marginal CM, weight wOM and wBM default value are 50%.For example: Tianjin is positioned at North China, adopt region, North China electric network data.In sum, the embodiment of the present invention is by methane gas and waste component are monitored, to the CH in component of refuse, Degradable organic carbon content, refuse landfill gas ₄ratio and half life period etc. revise, and bring forward the selection principle of above-mentioned parameter under different condition, and field instrument and host computer workstation are contacted, can real-time update data; The embodiment of the present invention has reduced the cost of monitoring, and monitoring result accuracy stable and that adjust is higher.

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.

The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (5)

1. a greenhouse gas emission monitoring method of town household refuse disposal system, is characterized in that, said method comprising the steps of:

(1) from the different rubbish of the 6 classes source that produces, gather respectively monitoring sample, obtain the content of organic carbon, and using the content typing host computer workstation of organic carbon as parameter;

(2) when in the landfill operation stage and without methane collection system, take step as unit, realize the landfill of rubbish, adopt static chamber method to monitor methane content, by methane gas analyser three ground, gather sequential control system and obtain the first methane content;

(3) when in the closing stage and without described methane collection system, natural pressure and methane content initial value in the landfill gas of all experiment wells of pre-test of bleeding, gas collection well is bled and measured bleed negative pressure and landfill gas composition, pressure and composition in monitor well monitoring landfill gas changes simultaneously, setting pressure probe, determine the coverage of bleeding, described methane gas analyser three ground gather sequential control system and obtain the second methane content according to pressure and composition;

(4) when having described methane collection system, use flue gas analyzer to monitor collecting well methane concentration, by described methane gas analyser three ground, gather sequential control system and obtain leucoaurin content;

(5) described the first methane content, described the second methane content or described leucoaurin content are sent to described host computer workstation by data service center, by described host computer workstation, obtain the gas production rate of unit weight rubbish within the unit interval;

(6) adopt single order evanescent mode, according to the content of described organic carbon, described the first methane content, described the second methane content and described leucoaurin content, obtain the discharge capacity of methane;

(7) according to the content of described organic carbon, obtain CO ₂and N ₂the discharge capacity of O;

(8) described host computer workstation is to the discharge capacity of described methane, described CO ₂and N ₂the discharge capacity of O is processed, and obtains data and curves figure;

Wherein, optional step (2) in the refuse landfill landfill process without described methane collection system, optional step (3) after closing, and in the refuse landfill that has described methane collection system omnidistance optional step (4).

2. a kind of greenhouse gas emission monitoring method of town household refuse disposal system according to claim 1, is characterized in that, the discharge capacity of described methane is specially:

Adopt single order evanescent mode, the discharge capacity of described methane:

E _CH4=DDOC _mdecompT×F×16/12

E _cH4cH for T landfill municipal solid wastes ₄discharge capacity, unit is ton; DDOC _mdecopTdDOC for T decomposition _m; F is the CH in the refuse landfill gas producing ₄ratio; 16/12 is CH ₄/ C molecular weight ratio;

The T DDOC that the year end, sanitary land fill was accumulated _m:

DDOC _maT=DDOC _mdT+(DDOC _maT-1×e ^-k)

The DDOC that T decomposes _m:

DDOC _mdecompT=DDOC _maT-1×(1-e ^-k)

T is the inventory time; DDOC _maTunit is ton; DDOC _maT-1the DDOC accumulating for T-1 terminal hour sanitary land fill _m, unit is ton; DDOC _mdTfor T deposit to sanitary land fill DDOC _m, unit is ton; K is reaction constant, k=ln (2)/t _1/2, unit is year, t _1/2for time half life period, wherein, described time half life period according to described unit weight rubbish the gas production rate within the unit interval determine.

3. a kind of greenhouse gas emission monitoring method of town household refuse disposal system according to claim 1, is characterized in that, described CO ₂discharge capacity:

$E_{{\mathrm{CO}}_2}=\mathrm{MSW}\×\underset{j}{\mathrm{\Σ}}({\mathrm{WF}}_j\×{\mathrm{dm}}_j\×{\mathrm{CF}}_j\×{\mathrm{FCF}}_j\×{\mathrm{OF}}_j)\×44/12$

for burning the CO of municipal solid wastes ₂discharge capacity, unit is ton; WF _jnumber percent for ingredient j in solid waste; Dm _jfor the dry matter percentage in ingredient j; CF _jratio for total carbon in the dry of ingredient j; FCF _jfor the ratio of mineral carbon in total carbon; OF _jfor oxidation factor, get 100%; 44/12 is CO ₂/ C molecular weight ratio; The municipal solid wastes quality of MSW for burning.

4. a kind of greenhouse gas emission monitoring method of town household refuse disposal system according to claim 1, is characterized in that, described N ₂the discharge capacity of O:

$E_{N_{2}O}=\mathrm{MSW}\×{\mathrm{EF}}_{N_{2}O}\×{10}^{-6}\×{\mathrm{GWP}}_{N_{2}O}$

for burning municipal solid wastes discharge N ₂the CO2 emission equivalent that O produces, unit is ton; The municipal solid wastes quality of MSW for burning, unit is ton;

for N ₂the emission factor of O; GWP _n2Ofor N ₂greenhouse effect and CO that O produces ₂the multiple of comparing, gets 310.

5. a kind of greenhouse gas emission monitoring method of town household refuse disposal system according to claim 1, is characterized in that, described method also comprises: the indirect discharge capacity to upstream and downstream is monitored,

The indirect discharge capacity of upstream comprises: upstream activity level and emission factor multiply each other and obtain CO ₂discharge capacity; Wherein, described activity level is specially: the energy-output ratio and the power consumption that in transportation rubbish process, consume;

The indirect discharge capacity in downstream comprises: from output electric weight to CO ₂cER monitor, be specially: after domestic rubbish disposal, externally the electric weight of output is multiplied by the CO of local generating ₂average emission coefficient, the CO of described local generating ₂average emission coefficient is line-based emission factor, is the weighted mean of electric weight limit emission factor and capacity limit emission factor.

Images