CN108014634A - A kind of method for accelerating methane emission reduction - Google Patents
A kind of method for accelerating methane emission reduction Download PDFInfo
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- CN108014634A CN108014634A CN201711135298.7A CN201711135298A CN108014634A CN 108014634 A CN108014634 A CN 108014634A CN 201711135298 A CN201711135298 A CN 201711135298A CN 108014634 A CN108014634 A CN 108014634A
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- B01D53/34—Chemical or biological purification of waste gases
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
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- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
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Abstract
The invention discloses a kind of method for accelerating methane emission reduction.This method is in anaerobism natural system, using methane as substrate, adds Fe (III) compound, carries out the anaerobic oxidation of methane.The present invention adds weak crystal type ferriferous oxide, can improve the anaerobic oxidation speed of methane, this method can be applied in the natural environment such as rice field or other anaerobic bottom muds, have broad application prospects in natural anaerobic system.
Description
Technical field
The present invention relates to a kind of method for accelerating methane emission reduction.
Background technology
Methane have higher unimolecule heat potentiality, per mole of methane warming effect it is bigger than equivalent carbon dioxide by 20~
30 times, be the important greenhouse gases for being only second to carbon dioxide.The 1990s, methane reached the contribution rate of greenhouse effects
20%.The methane concentration in air is 1.72cm at present3/m3, and every year with 1.0%~1.2% speed increase.Study table
If bright methane concentration is only increased with 0.9% speed, 8cm is just can reach to the year two thousand fifty3/m3, it is seen that methane becomes global climate
The influence of change grows in intensity.Rice field is one of main discharge of methane source, reaches 20-100Tg per annual emissions.Therefore, seek
Practicable paddy methane Mitigation options, it is most important to alleviating greenhouse effects improvement Global climate change.
In anaerobic environment, the methane that microbial degradation organic matter produces accounts for the 80% of atmospheric methane, wherein, most of production
It is born in the anaerobic environments such as marsh, wetland, agricultural land soil, underwater mud.Therefore, the methane anaerobic oxidized of microorganism driving is to reduce
The important channel of discharge of methane in natural environment.It is now recognized that methane anaerobic oxidized can be divided into sulphur according to the difference of electron acceptor
Two class of hydrochlorate reduced form methane anaerobic oxidized and denitrification type methane anaerobic oxidized.The former is used as methane anaerobic oxidized using sulfate
Final electron acceptor, final electron acceptor of the latter using nitrite or nitrate as methane anaerobic oxidized.
For thermodynamics, the free energy of redox reaction occurs with methane for the high volence metal ion such as Fe (III)
It is lower than sulfate and nitrous acid/nitrate, therefore the electricity for becoming methane anaerobic oxidized process is more likely utilized by microorganism
Sub- acceptor.However, in the Red Soil Paddy Fields environment of the particularly rich iron of natural ecosystems, methane production and discharge capacity are still very
It is high.Therefore a kind of method for improving methane anaerobic oxidized under natural system, accelerating methane emission reduction is found, it is very with practical value.
The content of the invention
It is an object of the invention to improve methane anaerobic oxidized efficiency, alleviate greenhouse effects, thus propose a kind of acceleration first
The method of alkane emission reduction.
The technical solution used in the present invention is：
A kind of method for accelerating methane emission reduction, is in anaerobism natural system, using methane as substrate, addition Fe (III) changes
Compound, carries out the anaerobic oxidation of methane.
In anaerobism natural system, the initial concentration of methane is 4000ppm~80000ppm.
In terms of iron atom, the concentration of Fe (III) compound is 10mM~200mM.
Preferably, when the initial concentration of methane is 40000ppm, the concentration of addition Fe (III) compound is 100mM.
Described Fe (III) compound is at least one of ferrihydrite, lepidocrocite.
The ORP of anaerobism natural system is -30mV~-180mV.
The beneficial effects of the invention are as follows：
In natural anaerobic system, weak crystal type ferriferous oxide is added, the anaerobic oxidation speed of methane, this method can be improved
It can be applied in the natural environment such as rice field or other anaerobic bottom muds, have broad application prospects.
Brief description of the drawings
Fig. 1 is the methane oxidation Dynamic Graph of various concentrations ferrihydrite processing；
Fig. 2 is Fe (II) concentration dynamic change figure of various concentrations ferrihydrite processing；
Fig. 3 is the methane oxidation Dynamic Graph of different crystal type iron ore processing；
Fig. 4 is Fe (II) concentration dynamic change figure of different crystal type iron ore processing.
Embodiment
A kind of method for accelerating methane emission reduction, is in anaerobism natural system, using methane as substrate, addition Fe (III) changes
Compound, carries out the anaerobic oxidation of methane.
Preferably, in anaerobism natural system, the initial concentration of methane is 4000ppm~80000ppm.
Preferably, in terms of iron atom, the concentration of Fe (III) compound is 10mM~200mM.
Preferably, when the initial concentration of methane is 40000ppm, the concentration of addition Fe (III) compound is 100mM.
Preferably, the Fe (III) compound is at least one of ferrihydrite, lepidocrocite.
The ORP (oxidation-reduction potential) of anaerobism natural system is -30mV~-180mV.
Present disclosure is described in further detail below by way of specific embodiment, but protection domain not only limits
In this.
Embodiment 1：
By Guangzhou rice field flooded soils and water with 1:3 (mass ratioes) are uniformly mixed, and fill high pure nitrogen to anaerobic state (ORP
For -30~-180mV), add 470 μm of ol (about 40000ppm) methane gas and 100mM ferriferous oxides (in terms of iron atom) carry out
Enrichment culture.
Liquid 50mL is filled in 125mL anaerobism bottles, wherein inoculation soil enrichment culture 5mL, anaerobic culture medium 45mL, each
Final concentration of 470 μm of ol of methane in bottle, add various concentrations ferrihydrite, and iron ore concentration is respectively 10,50 in terms of iron atom,
100mM, while with not adding ferrihydrite contrast.Experiment process is write a Chinese character in simplified form respectively：CK (does not add ferrihydrite)；Fh-
10mM；Fh-50Mm and Fh-100mM.
Anaerobic culturel is carried out after processing：Fill N2：CO2(v:V=80:20) gaseous mixture, first inflates 1h, then liquid under liquid level
30min is inflated on face, it is in anaerobic state (ORP is -30~-180mV) to make whole reaction system, is positioned over 30 DEG C of constant incubators
Middle lucifuge quiescent culture.
Wherein Anaerobic culturel based formulas is as shown in table 1~3.
1 Anaerobic culturel based formulas of table
| Compound name | Concentration | Compound name | Concentration |
| NH4Cl | 0.1g·L-1 | HePes (4- hydroxyethyl piperazineethanesulfonic acids) | 2.38g·L-1 |
| KCl | 0.5g·L-1 | CaCl2·2H2O | 0.1g·L-1 |
| KH2PO4 | 0.2g·L-1 | Vitamin stock | 1ml·L-1 |
| MgCl2·6H2O | 0.0475g·L-1 | Micro- liquid storage | 10ml·L-1 |
2 vitamin formula of table
3 trace element formula of table
Detect head space concentration of methane gas and Fe (II) concentration produced in cultivation cycle system.
Methane gas detection method：Gas sampling pin takes 200 μ L of blake bottle headspace gas, with gas chromatograph (GC-
7900) (fid detector) is measured, injector temperature：120 DEG C, column temperature：80 DEG C, detector temperature：170℃.
As a result as shown in Figures 1 and 2, within two Anaerobic culturel cycles, it is not added with the CK processing methane of ferrihydrite
Not reducing, and add the processing of ferrihydrite, methane concentration has a degree of decline, and with the liter of Fe (II) concentration
It is high.The methane concentration between the processing of various concentrations ferrihydrite is contrasted, finds methane oxidation speed and amount of oxidation all as ferrihydrite is dense
The rise of degree is accelerated to increase, and ferrihydrite Fe (III) is reduced into the speed of Fe (II) and Fe (II) yield also increases therewith.Oxygen
Changing 1 molecule methane needs 8 Fe (III) to receive electronics, by calculating methane oxidation and Fe (III) reducing equivalent, culture
The generation concentration of Fe (II) and the amount of oxidation of methane are 8 in system:1.As a result the anaerobic oxidation for illustrating methane is by ferrihydrite
Fe (III) reduction Fe (II) drivings, and ferrihydrite concentration is higher, Fe (III) reduction is stronger, and methane emission reduction amount is more notable.
Embodiment 2：
By Guangzhou rice field flooded soils and water with 1:3 (mass ratioes) are uniformly mixed, and fill high pure nitrogen to anaerobic state (ORP
For -30~-180mV), add 470 μm of ol (about 40000ppm) methane gas and 100mM ferriferous oxides (in terms of iron atom) carry out
Enrichment culture.
Liquid 50mL is filled in 125mL anaerobism bottles, wherein inoculation soil enrichment culture 5mL, anaerobic culture medium 45mL, each
Final concentration of 470 μm of ol of methane, add different crystal type ferriferous oxides, ferriferous oxide concentration is in terms of iron atom in bottle
100mM, while with not adding ferriferous oxide contrast.Experimental design is：CK (does not add ferriferous oxide)；
Ferrihydrite (ferrihydrite)；Lepidocrocite (lepidocrocite)；Hematite (bloodstone) and Magnetite (magnet
Ore deposit).
Culture medium prescription, Anaerobic culturel, methane and Fe (II) detection methods are the same as described in embodiment 1.
As a result as shown in attached drawing 3 and attached drawing 4, the CK that is not added with ferriferous oxide and the magnetic iron ore that with the addition of crystal type and/or red
In the processing of iron ore, methane concentration has no significant change in cultivating system, and Fe (II) content is consistent.It with the addition of weak crystallization
Property ferrihydrite and lepidocrocite processing in, methane concentration is reduced to 70 μm of ol in whole cultivation cycle from 470 μm of ol or so.Therewith
Corresponding to be, Fe (II) concentration constantly rises to 70mM in system.As a result illustrate that the stronger magnetic iron ore of crystal form and bloodstone are unfavorable
Utilized in microorganism, therefore oxidation to methane and emission reduction effect are faint；And the weaker ferrihydrite of crystal form and lepidocrocite easily by
Micro-reduction utilizes, and has active effects to methane anaerobic oxidized and emission reduction.
Claims (6)
- A kind of 1. method for accelerating methane emission reduction, it is characterised in that：In anaerobism natural system, using methane as substrate, Fe is added (III) compound, carries out the anaerobic oxidation of methane.
- A kind of 2. method for accelerating methane emission reduction according to claim 1, it is characterised in that：The initial concentration of methane is 4000ppm~80000ppm.
- A kind of 3. method for accelerating methane emission reduction according to claim 1, it is characterised in that：In terms of iron atom, Fe (III) The concentration of compound is 10mM~200mM.
- A kind of 4. method of acceleration methane emission reduction according to Claims 2 or 3, it is characterised in that：It is initial dense when methane Spend for 40000ppm when, addition Fe (III) compound concentration be 100mM.
- A kind of 5. method for accelerating methane emission reduction according to claim 4, it is characterised in that：Fe (III) compound is water At least one of iron ore, lepidocrocite.
- A kind of 6. method for accelerating methane emission reduction according to claim 1, it is characterised in that：The ORP of anaerobism natural system For -30mV~-180mV.
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Cited By (4)
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| CN109797706A (en) * | 2018-11-27 | 2019-05-24 | 水利部交通运输部国家能源局南京水利科学研究院 | It is a kind of for improve operation reservoir greenhouse effects reduction of greenhouse gas discharge method |
| CN113003717A (en) * | 2021-03-11 | 2021-06-22 | 大连理工大学 | Device and process for enhancing denitrification anaerobic methane oxidation denitrification based on magnetite |
| CN114456816A (en) * | 2022-02-18 | 2022-05-10 | 南开大学 | Reagent for reducing soil methane emission and method for reducing soil methane emission |
| CN114558417A (en) * | 2022-02-18 | 2022-05-31 | 湖南农业大学 | Method for reducing emission of greenhouse gas in rice field |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109797706A (en) * | 2018-11-27 | 2019-05-24 | 水利部交通运输部国家能源局南京水利科学研究院 | It is a kind of for improve operation reservoir greenhouse effects reduction of greenhouse gas discharge method |
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| CN113003717A (en) * | 2021-03-11 | 2021-06-22 | 大连理工大学 | Device and process for enhancing denitrification anaerobic methane oxidation denitrification based on magnetite |
| CN114456816A (en) * | 2022-02-18 | 2022-05-10 | 南开大学 | Reagent for reducing soil methane emission and method for reducing soil methane emission |
| CN114558417A (en) * | 2022-02-18 | 2022-05-31 | 湖南农业大学 | Method for reducing emission of greenhouse gas in rice field |
| CN114456816B (en) * | 2022-02-18 | 2023-02-17 | 南开大学 | Reagent for reducing soil methane emission and method for reducing soil methane emission |
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