CN108614047A - A kind of assay method and system of methane discharge of ruminant - Google Patents
A kind of assay method and system of methane discharge of ruminant Download PDFInfo
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- CN108614047A CN108614047A CN201810395603.4A CN201810395603A CN108614047A CN 108614047 A CN108614047 A CN 108614047A CN 201810395603 A CN201810395603 A CN 201810395603A CN 108614047 A CN108614047 A CN 108614047A
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- methane
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0044—Specially adapted to detect a particular component for H2S, sulfides
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0047—Specially adapted to detect a particular component for organic compounds
Abstract
The present invention relates to a kind of assay method of methane discharge of ruminant and systems, wherein assay method includes the following steps：S1：Ruminant is put into sensing chamber, while to preset rate of discharge to the indoor discharge sulfur hexafluoride of detection；S2：Gas in sensing chamber is sampled；S3：Analyze the concentration of the concentration and sulfur hexafluoride of the methane in the sample gas of acquisition；S4：Calculate the rate of discharge of methane.The assay method can accurately detect that the discharge of methane situation of domestic animal, this method are simply readily accomplished, and the system structure is simple and easy to remove, and since the required precision to equipment is not high so that good economy performance.
Description
Technical field
The present invention relates to livestock-raising technical field, more particularly to a kind of assay method of methane discharge of ruminant and it is
System.
Background technology
2006 annual report of FAO (Food and Agriculture Organization of the United Nation) (FAO) shows contribution of the animal husbandry to Global Emissions of Greenhouse Gas total amount
Rate is 18%, is more than the discharge of global traffic transport, it is foster that the whole world has 37% methane and 65% nitrogen dioxide to result from herding
Process is grown, therefore the methane emission during Accurate Determining livestock-raising will reduce ruminant for future by technological means
Methane emission has a very important significance.Currently, the method for directly measuring discharge of methane in China have respiration chamber method,
Breathe head case method and sulfur hexafluoride trace method etc..
The basic principle of respiration chamber method is domestic animal to be placed in closed respiratory box, is exhaled by measuring in certain time
The variation for inhaling concentration of methane gas in metabolism case calculates discharge capacity, and breathing head case method is that the entire head of domestic animal is fixed in head case
Measured concentration breathing mask method measurement is that only have mouth and nose to be covered by mask domestic animal, and the gas breathed out by domestic animal is dense to detect
Degree requires more stringent, equipment since respiration chamber and breathing head case all need to be absolutely sealed for the making of equipment
Cost of manufacture it is higher, meanwhile, existing respiration chamber and breathing head case be all to be fixedly arranged on interior, for pasture stock come
It says, it is irremovable, it is not easy to be detected the discharge of methane of pasture stock.
Sulfur hexafluoride tracer can measure the methane emission of pasture stock with the method that gas producing device is combined, general
Way be sulfur hexafluoride gas solid state at very low temperature is encased in the osmos tube with certain rate of release, then
Osmos tube is put into the cud of ruminant, the SF of osmos tube release6The diffusion property of methane gas is generated with cud
It is similar, it discharges latter with the harvester acquisition for being installed in ruminant back.Later stage measures acquisition using gas chromatography
Sulfur hexafluoride in device and methane concentration, since the rate of release of sulfur hexafluoride is it is known that pass through formula：QCH4=QSF6×CCH4/
CSF6Methane discharge of ruminant rate (Q is calculatedCH4To herd sheep discharge of methane rate, QSF6For sulphur hexafluoride emission speed
Rate, CCH4For methane concentration, CSF6For methane concentration).
Single SF6Although tracer can measure the discharge capacity of methane under grazing condition with the method that gas producing device is combined,
It is to have the following defects：(1) comparison of sulfur hexafluoride osmos tube is difficult, takes, effort, and rate of release is unstable, such as
Buy the SF of commercialization6Osmos tube is expensive；(2)SF6Osmos tube reuses difficulty after putting into cud, need to be to reality
It is taken out after testing animal slaughtering；(3) it measures release rate experiments domestic animal to need to bear gas sampler, fixation is relatively difficult.
Therefore, how a kind of measurement of methane discharge of ruminant simple in structure, easy to operate and good economy performance is provided
Method is those skilled in the art's technical issues that need to address.
Invention content
The present invention is intended to provide the assay method and system of a kind of methane discharge of ruminant, can accurately detect domestic animal
Discharge of methane situation, this method is simply readily accomplished, and the system structure is simple and easy to remove, and due to the precision to equipment
It is of less demanding so that good economy performance.
To achieve the above object, the present invention provides a kind of assay methods of methane discharge of ruminant comprising as follows
Step：
S01：Ruminant is put into closed detection device to preset time；
S02：Gas in detection device is sampled；
S03：Analyze the concentration of the methane in the sample gas of acquisition.
Ruminant is put into closed detection device, so that the ruminant is stopped in closed detection device default
Then time samples the gas in the closed detection device and analyzes the concentration of methane in gas, you can calculated
The amount (namely for methane rate of discharge) for the methane that the ruminant is discharged in detection device in the unit interval.
Optionally, in step S03, pass through the concentration of the methane in the sample gas of chromatograph analysis acquisition.
To achieve the above object, the present invention provides a kind of assay methods of methane discharge of ruminant comprising as follows
Step：
S1：Ruminant is put into sensing chamber, while to preset rate of discharge to the indoor discharge sulfur hexafluoride of detection；
S2：Gas in sensing chamber is sampled；
S3：Analyze the concentration of the concentration and sulfur hexafluoride of the methane in the sample gas of acquisition；
S4：The rate of discharge of methane is calculated by following formula：
QCH4=QSF6×CCH4/CSF6
Wherein, QCH4For the discharge of methane rate of ruminant, QSF6For the default rate of discharge of sulfur hexafluoride, CCH4For first
The concentration of alkane, CSF6For the concentration of sulfur hexafluoride.
Optionally, in step S2, include to detecting indoor gas and sample：Along the sensing chamber short transverse into
Row stratified sampling and/or circumferential uniform sampling along the sensing chamber；Further include step between step S2 and step S3：S21：
The sample gas of each layer acquisition in S2 is mixed to obtain gas to be detected.
In addition, the present invention also provides a kind of measurement systems of methane discharge of ruminant comprising：Sensing chamber is used for
Place ruminant；Sulphur hexafluoride emission device is set to detection interior, for lithium to the indoor discharge of the detection
Sulphur；Gas sampler is set to detection interior, for acquiring the indoor sample gas of detection；Gas collecting apparatus, for receiving
The acquired sample gas of collection；Chromatograph, for analyzing methane concentration and concentration of sulfur hexafluoride in the sample gas.
Optionally, the quantity of the gas sampler is at least two, and each gas sampler is along the sensing chamber
Short transverse setting and/or be uniformly arranged along the circumferential direction of the sensing chamber.
Optionally, the detection interior is additionally provided with fan, for keeping the indoor gas mixing of detection uniform.
Optionally, the sulphur hexafluoride emission device include standard sulfur hexafluoride steel cylinder and with the standard sulfur hexafluoride steel
The gas dilution instrument of bottle connection.
While ruminant is put in detection interior, sulphur hexafluoride emission device is to preset rate of discharge to the sensing chamber
Interior discharge sulfur hexafluoride, the two is carried out at the same time, and after certain time, detection is indoor all to have a certain amount of sulfur hexafluoride and methane
Two kinds of gases sample the indoor gas of detection by gas sampler and are put into gas collecting apparatus in order to place and take
Band, then by the concentration of sulfur hexafluoride and methane in the sample gas of chromatograph analysis acquisition, and finally according to above-mentioned
The discharge of methane rate of pasture stock is calculated in formula.
When the said determination method and measurement system provided through the invention is measured methane discharge of ruminant,
It is relatively low to the seal request of sensing chamber, since sulfur hexafluoride is similar to the diffusion property for the methane that cud generates, even
The sensing chamber has ventilative situation, sulfur hexafluoride to leak out the situation outside sensing chamber and the situation outside methane leakage sensing chamber also class
Seemingly, that is, the concentration ratio (C of indoor sulfur hexafluoride and methane is detectedCH4/CSF6) constant, according to formula it is found that final calculating knot
Fruit discharge of methane rate QCH4Will not due to sensing chamber leak out situation and it is impacted.
That is, the sensing chamber is being mainly used for keeping out the wind, methane and sulfur hexafluoride gas is avoided to be blown away, passed through
After a certain period of time, a certain amount of methane and sulfur hexafluoride can be mixed in the indoor air of the detection so as to the dense of two kinds of gas
Degree is detected.By in this present embodiment, relatively low for the sealing requirements of sensing chamber, therefore, which can select
With movable tent or moveable babinet etc., the cost of manufacture of equipment can be substantially reduced, improves economy.Also, the inspection
Room is surveyed can also to be tested with being taken to test, be moved to admittedly without the ruminants such as sheep, ox will be herded according to test needs
It in fixed secret room, that is, measures place and is not fixed, specific setting position, simple operation and applicability can be needed good according to detection.
Meanwhile in the present invention, for ruminant is being detected indoor time, that is, the drain time of sulfur hexafluoride
Specific requirement is not done, as long as can guarantee that detection is indoor has a certain amount of methane and sulfur hexafluoride, to be capable of detecting when the two
Concentration.
In addition, in detection process, ruminant is put into cud without bearing any detection part without by osmos tube
In, simplified operation process is gone back while saving cost and will not be caused any harm to the ruminant detected.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.
Fig. 1 is the flow diagram of the assay method for the methane discharge of ruminant that the embodiment of the present invention is provided；
Fig. 2 is the structural schematic diagram of the measurement system for the methane discharge of ruminant that the embodiment of the present invention is provided.
In attached drawing 2, attached drawing mark is as follows：
1- sensing chamber；2- ruminants；3- sulphur hexafluoride emission devices；4- gas samplers；5- fans.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The embodiment of the present invention provides a kind of assay method of methane discharge of ruminant comprising following steps：
S01：Ruminant is put into closed detection device to preset time；
S02：Gas in detection device is sampled；
S03：Analyze the concentration of the methane in the sample gas of acquisition.
Ruminant 2 is put into closed detection device, the ruminant 2 is made to be stopped in closed detection device in advance
If the time, then the gas in the closed detection device is sampled and analyzes the concentration of methane in gas, you can is calculated
Go out the amount (namely for methane rate of discharge) for the methane that the ruminant is discharged in detection device in the unit interval.
In the above-described embodiments, in step S03, pass through the dense of the methane in the sample gas of chromatograph analysis acquisition
Degree, accurately to detect the methane concentration in detection device.
The embodiment of the present invention provides a kind of assay method of methane discharge of ruminant and the survey based on the assay method
Determine system, wherein as shown in Figure 1, the assay method of discharge of methane includes the following steps：
S1：Ruminant 2 is put into sensing chamber 1, while being discharged into sensing chamber 1 with default rate of discharge lithium
Sulphur；
S2：Gas in sensing chamber 1 is sampled；
S3：Analyze the concentration of methane and the concentration of sulfur hexafluoride in the sample gas of acquisition；
S4：The rate of discharge of methane is calculated by following formula：
QCH4=QSF6×CCH4/CSF6 (1)
Wherein, QCH4For the discharge of methane rate of ruminant 2, QSF6For the default rate of discharge of sulfur hexafluoride, CCH4For first
The concentration of alkane, CSF6For the concentration of sulfur hexafluoride.
In step sl, the ruminants such as ox, sheep 2 are put into sensing chamber 1, while to preset rate of discharge to test cabinet
Interior discharge sulfur hexafluoride, the two is carried out at the same time, and after certain time, all has a certain amount of sulfur hexafluoride and first in sensing chamber 1
Two kinds of gases of alkane；In step s 2, the gas in sensing chamber 1 is sampled；Then the sample gas of acquisition is divided again
Analysis and calculate, specifically include in step S3, analyze sample gas in sulfur hexafluoride and methane concentration, due to sulfur hexafluoride with
The diffusion property for the methane that cud generates is similar, and the rate of discharge of sulfur hexafluoride is it is known that therefore, can be according to institute in step S3
The concentration of sulfur hexafluoride and methane in the sensing chamber 1 of analysis calculates the first of ruminant 2 in sensing chamber 1 according to formula (1)
Alkane rate of discharge, and then the methane emission of domestic animal in certain time can be acquired.
And the measurement system for the methane discharge of ruminant that the embodiment of the present invention is provided includes then：It is sensing chamber 1, lithium
Sulphur emissions device 3, gas sampler 4, gas collecting apparatus and chromatograph, wherein sensing chamber 1 is for herding sheep, hexafluoro
Change sulphur emissions device 3 to be set in sensing chamber 1 and be used to discharge sulfur hexafluoride into the sensing chamber 1, gas sampler 4 is set to inspection
It surveys in room 1 and for acquiring the sample gas in the sensing chamber 1, gas collecting apparatus is used to collect acquired sample gas, and
Chromatograph is then used to analyze the methane concentration and concentration of sulfur hexafluoride in the sample gas.
Specifically, while ruminant 2 is put in sensing chamber 1, sulphur hexafluoride emission device 3 is to preset rate of discharge
Sulfur hexafluoride is discharged into the sensing chamber 1, the two is carried out at the same time, and after certain time, all has a certain amount of six in sensing chamber 1
Two kinds of gases of sulfur fluoride and methane, sample the gas in sensing chamber 1 by gas sampler 4 and are put into gas collecting apparatus
In order to place and carry, the concentration of sulfur hexafluoride and methane in the sample gas of acquisition is then analyzed by chromatograph,
And the discharge of methane rate of ruminant 2 is finally calculated according to above-mentioned formula (1).
When the assay method and measurement system provided through this embodiment is measured 2 discharge of methane of ruminant,
It is relatively low to the seal request of sensing chamber 1, due to the diffusion property phase for the methane that the cud of sulfur hexafluoride and ruminant 2 generates
Seemingly, therefore, even the sensing chamber 1 has ventilative situation, sulfur hexafluoride to leak out situation and methane leakage detection outside sensing chamber 1
Situation outside room 1 is also similar, i.e. concentration ratio (the C of sulfur hexafluoride in sensing chamber 1 and methaneCH4/CSF6) constant, according to above-mentioned public affairs
Formula (1) is it is found that final result of calculation discharge of methane rate QCH4Will not due to sensing chamber 1 leak out situation and it is impacted.
That is, the sensing chamber 1 is being mainly used for keeping out the wind, methane and sulfur hexafluoride gas is avoided to be blown to four winds, passed through
After after a certain period of time, a certain amount of methane and sulfur hexafluoride can be mixed in the air in the sensing chamber 1 so as to two kinds of gases
Concentration be detected.It is relatively low for the sealing requirements of sensing chamber 1 by this present embodiment, therefore, the sensing chamber 1
Movable tent or moveable babinet etc. can be selected, the cost of manufacture of equipment can be substantially reduced, improves economy.And
And the sensing chamber 1 can also be tested, according to test needs without that will herd the ruminants such as sheep, ox in which be taken to test
2 are moved in fixed secret room, that is, measure and place and be not fixed, can be needed according to detection specific setting position, simple operation and
Applicability is good.
Meanwhile in the present embodiment, the discharge for the time by ruminant 2 in sensing chamber 1, that is, sulfur hexafluoride
Time does not do specific requirement, as long as can guarantee has a certain amount of methane and sulfur hexafluoride in sensing chamber 1, to be capable of detecting when two
The concentration of person.
In addition, in detection process, ruminant 2 is put into tumor without bearing any detection part without by osmos tube
In stomach, the ruminant 2 detected will not be made by being gone back while saving cost in simplified operation process and detection process
At any injury.
In the above-described embodiments, it includes following three kinds of situations to carry out sampling to the gas in sensing chamber 1：
(1) along the short transverse stratified sampling of sensing chamber 1, at this point, height of at least two gas samplers 4 along sensing chamber 1
Spend direction setting；
(2) along the circumferential uniform sampling of sensing chamber 1, at this point, at least two gas samplers 4 are along the circumferential equal of sensing chamber 1
Even setting；
(3) above-mentioned stratified sampling and circumferential uniform sampling combine, at this point, at least two gas samplers 4, along height side
It is located at different positions to circumferential.
Certainly, in the present embodiment, the gas in sensing chamber 1 can also be adopted by a gas sampler 4
Sample, and sample avoidable gas due to occurring in lamination or sensing chamber 1 by above-mentioned three kinds of gas sampling modes
The uneven testing result for influencing gas concentration of gas mixing, and then improve the accuracy of measurement result.
Specifically, do not do specific requirement for the quantity of gas sampler 4, can according to the floor space of sensing chamber 1 and
Height is set, as shown in Fig. 2, in the present embodiment, is adopted along the layering of the short transverse of sensing chamber 1 by the first situation
The floor space of sample, sensing chamber 1 is 6m2, be highly 2m, if there are three gas sampler 4, be located at 0.5m, 1m and 1.5m
High position to carry out stratified sampling to the gas in sensing chamber 1, and is stored respectively in gas collecting apparatus, at this point, in step S2
Further include the step S21 for mixing each layer gas between step S3：The sample gas of each layer acquisition in step S2 is mixed to obtain
Gas to be detected is obtained, i.e., by the gas in three gas collecting apparatus in equal volume than mixing to obtain gas to be detected；Then it treats again
Detection gas are analyzed, are calculated.
The measurement system further includes fan 5, which is set in sensing chamber 1, for increasing the gas stream in sensing chamber 1
It is dynamic, so that internal gas is uniformly mixed, to further increase precision of analysis.Correspondingly, in assay method, for inspection
Survey room 1 in gas mixing can be by ruminant 2 be put into side in sensing chamber 1 start start fan 5 in sensing chamber 1
Gas mixed, can also be in step s 2, before sampling, first to be mixed to the gas in sensing chamber 1, it is specific mixed
Close the time do not limit, can as the case may be, as sensing chamber 1 volume size, the quantity and power of fan 5 situations such as carry out
Setting.
In the above-described embodiments, sulphur hexafluoride emission device 3 includes standard sulfur hexafluoride steel cylinder and lithium with the standard
The gas dilution instrument of sulphur steel cylinder connection, that is to say, that sulfur hexafluoride discharges after dilution, in order to carry out essence to its discharge capacity
True control.
Specifically, by said determination system according to said determination method (experimental group) to herding the discharge of methane situation of sheep
It is measured, and the measurement result is compared with the testing result by respiration chamber method (control group)：Test sheep with
Machine selects that the age is close, the close experiment sheep of weight 6, control group 3, experimental group 3, control group and experimental group sheep daily ration one
It causes.
It is BQ by the discharge of methane rate that respiration chamber method measuresCH4, specific assay method is to those skilled in the art
For be the well known prior art, for save length, details are not described herein.The measurement result of control group is shown in Table (one)：
Table (one) control group sheep discharge of methane rate (BQCH4)
The rate of discharge that assay method through this embodiment measures methane is MQCH4, the specific method is as follows：
Movable tent (sensing chamber 1) is set up measuring place, three experiment sheep are caught up in movable tent, while by hexafluoro
Change sulphur calibrating gas steel cylinder to link by Standard Gases pressure reducing valve and calibrating gas dilution instrument, it will by established standards gas dilution instrument
The default rate of discharge Q of sulfur hexafluoride calibrating gasSF6Adjust 100mL/min；
Fan 5 in open detection room 1；
Vacuum gas sampler 4 is opened, the short transverse layering along sensing chamber 1 samples internal gas, and will
The sample gas acquired is put into metal foil gas sampling bag；
The gas that different height acquires is mixed by volume；
The gas of acquisition is used into chromatographic methane concentration CCH4With concentration of sulfur hexafluoride CSF6；
Methane is calculated by formula (1) and arranges rate of discharge MQCH4。
The measurement result of experimental group is shown in Table (two)：
Table (two) experimental group sheep discharge of methane rate (MQCH4)
Compared with the control group, the accuracy of experimental group can be calculated according to following formula (2)：
(CV%)=[1- | MQCH4-BQCH4|/BQCH4] × 100% (2)
It brings said determination result into formula (2), is computed, the accuracy of experimental group is 97.7%.As it can be seen that passing through this reality
The measurement system of example offer is provided or the discharge of methane situation of sheep that assay method is measured with by being surveyed by respiration chamber method
Fixed result is close, and error is smaller, it can be said that the accuracy of bright this method is high, has practicability.
In experimental group, a concentration of 0.5ppm of sulfur hexafluoride presets rate of discharge QSF6For 100mL/min, do not do herein
Concrete restriction, thus it is possible to vary one of parameter can also use other discharge parameter combinations, and such parameter setting
Under (0.5ppm, 100ml/min), it may make the discharge capacity of the sulfur hexafluoride close with the methane emission of ruminant 2 so that
The emission behaviour of sulfur hexafluoride and methane more closely, promote the accuracy of measurement result in turn.
In the above-described embodiments, when measuring the discharge of methane situation of ruminant 2, according to same day different time respectively to anti-
The discharge of methane of hay animal 2 is measured, specifically, will be real for detecting discharge of methane situation of the sheep within one day
Sheep is tested respectively 6:00、12:00 and 18:00 catches up with into movable tent, measures methane emission, will obtain three measurement results, take
Discharge of methane rate of the average value of above three measurement result as the experiment sheep same day, to calculate its first within one day
Alkane discharge capacity.Such assay method can avoid due to sheep in the morning, noon and the meal situation in evening or the difference of motion conditions
And influence the accuracy of the final result for calculating methane emission.
Certainly, specific requirement is not made for the quantity and time point of the period of the measurement of selection, can also such as be selected
It selects and experiment sheep is distributed in 6:00、11:00、16:00 and 21:00 4 time points are measured.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (8)
1. a kind of assay method of methane discharge of ruminant, which is characterized in that include the following steps：
S01：Ruminant is put into closed detection device to preset time；
S02：Gas in detection device is sampled；
S03：Analyze the concentration of the methane in the sample gas of acquisition.
2. the assay method of methane discharge of ruminant according to claim 1, which is characterized in that in step S03, pass through
The concentration of methane in the sample gas of chromatograph analysis acquisition.
3. a kind of assay method of methane discharge of ruminant, which is characterized in that include the following steps：
S1：Ruminant is put into sensing chamber, while to preset rate of discharge to the indoor discharge sulfur hexafluoride of detection；
S2：Gas in sensing chamber is sampled；
S3：Analyze the concentration of the concentration and sulfur hexafluoride of the methane in the sample gas of acquisition；
S4：The rate of discharge of methane is calculated by following formula：
QCH4=QSF6×CCH4/CSF6
Wherein, QCH4For the discharge of methane rate of ruminant, QSF6For the default rate of discharge of sulfur hexafluoride, CCH4For methane
Concentration, CSF6For the concentration of sulfur hexafluoride.
4. the assay method of methane discharge of ruminant according to claim 3, which is characterized in that
In step S2, include to detecting indoor gas and sample：Short transverse along the sensing chamber carries out stratified sampling
And/or the circumferential uniform sampling along the sensing chamber；
Further include between step S2 and step S3：
Step S21：The sample gas of each layer acquisition in S2 is mixed to obtain gas to be detected.
5. a kind of measurement system of the assay method based on the methane discharge of ruminant described in claim 3 or 4, feature exist
In, including：
Sensing chamber, for placing ruminant；
Sulphur hexafluoride emission device is set to detection interior, is used for the indoor discharge sulfur hexafluoride of the detection；
Gas sampler is set to detection interior, for acquiring the indoor sample gas of detection；
Gas collecting apparatus, for collecting acquired sample gas；
Chromatograph, for analyzing methane concentration and concentration of sulfur hexafluoride in the sample gas.
6. the measurement system of methane discharge of ruminant according to claim 5, which is characterized in that the gas sampler
Quantity be at least two, and each gas sampler along the sensing chamber short transverse setting and/or along the detection
The circumferential direction of room is uniformly arranged.
7. the measurement system of methane discharge of ruminant according to claim 5, which is characterized in that the detection is indoor also
Equipped with fan, for keeping the indoor gas mixing of detection uniform.
8. seeking the measurement system of the methane discharge of ruminant described in 5 according to claim, which is characterized in that the sulfur hexafluoride
Tapping equipment includes standard sulfur hexafluoride steel cylinder and the gas dilution instrument that is connect with the standard sulfur hexafluoride steel cylinder.
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| CN112147248A (en) * | 2020-09-23 | 2020-12-29 | 浙江求实环境监测有限公司 | Method for rapidly determining content of benzene series components in waste gas of fixed pollution source |
| CN114994299A (en) * | 2022-08-08 | 2022-09-02 | 北京市农林科学院智能装备技术研究中心 | Ruminant carbon emission gas detection method, device and system |
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