CN118108330A - Method for reducing methane emission through micro-oxygen storage of biogas slurry in livestock and poultry farm - Google Patents
Method for reducing methane emission through micro-oxygen storage of biogas slurry in livestock and poultry farm Download PDFInfo
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- CN118108330A CN118108330A CN202410217643.5A CN202410217643A CN118108330A CN 118108330 A CN118108330 A CN 118108330A CN 202410217643 A CN202410217643 A CN 202410217643A CN 118108330 A CN118108330 A CN 118108330A
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- 239000002002 slurry Substances 0.000 title claims abstract description 95
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 72
- 239000001301 oxygen Substances 0.000 title claims abstract description 72
- 244000144972 livestock Species 0.000 title claims abstract description 31
- 244000144977 poultry Species 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000005273 aeration Methods 0.000 claims abstract description 38
- 239000007789 gas Substances 0.000 claims abstract description 20
- 238000004891 communication Methods 0.000 claims abstract description 6
- 238000009423 ventilation Methods 0.000 claims description 3
- 239000010871 livestock manure Substances 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 244000005700 microbiome Species 0.000 abstract description 3
- 238000005842 biochemical reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000000696 methanogenic effect Effects 0.000 abstract description 2
- 241000894006 Bacteria Species 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 210000003608 fece Anatomy 0.000 description 12
- 238000000855 fermentation Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 241000283690 Bos taurus Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/006—Regulation methods for biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides a method for reducing methane emission through micro-oxygen storage of biogas slurry in a livestock farm, which relates to the technical field of livestock manure treatment and utilization and comprises the following steps: s1, a biogas slurry communication aeration switch automatic control system; s2, setting aeration intensity through an aeration switch automatic control system so as to regulate and control the concentration of dissolved oxygen in the biogas slurry. The method solves the problem of large gas discharge amount of the methane isothermal chamber in the livestock and poultry biogas slurry storage process, and realizes the micro-oxygen storage environment of the biogas slurry by regulating and controlling the concentration of dissolved oxygen in the biogas slurry according to the biochemical reaction principle of methanation of organic matters, so that the methane production activity of methanogenic microorganisms can be effectively inhibited, the oxidation of methane by methane oxidizing bacteria can be promoted, and the methane production in the biogas slurry storage process is reduced.
Description
Technical Field
The invention relates to the technical field of livestock and poultry manure treatment and utilization, in particular to a method for reducing methane emission through micro-oxygen storage of biogas slurry in a livestock and poultry farm.
Background
China is a large livestock and poultry raising country, and the influence of livestock and poultry manure on ecological environment is a key problem for restricting the high-quality green development of animal husbandry. Anaerobic fermentation technology is one of the main technologies for processing and utilizing livestock and poultry manure, and because the anaerobic fermentation technology can degrade organic matters in the livestock and poultry manure, methane is recovered as clean energy for heat production or power generation, the methane discharge amount of the livestock and poultry manure is reduced, and meanwhile ecological, economic and social benefits are obtained. However, a great deal of research has demonstrated that biogas slurry is an important component of greenhouse gas emissions from agricultural sources, and that methane emissions during storage of biogas slurry are not negligible.
Although the anaerobic fermentation process has performed conversion and utilization on easily degradable organic carbon in the livestock and poultry manure, researches show that biogas slurry generated after the livestock and poultry manure is subjected to anaerobic fermentation has huge methane emission potential, and if the biogas slurry is improperly treated, additional greenhouse gas emission and environmental pollution can be caused. For example, rodhe and the like have carried out research on methane emission during 3 months of storage of raw manure and biogas slurry produced after anaerobic fermentation in a cattle farm, and the result shows that the methane emission during the storage of raw manure and biogas slurry is respectively 2.37 g CH4-C/m3 slow/d and the methane production during the storage of biogas slurry is far higher than that of raw manure. Moitzi and the like show that the methane emission rate of pig farm biogas slurry during storage (100 days) is 7.9 times higher than that of raw manure. Rodhe also showed that the cumulative methane emission during the summer storage of cow farm biogas slurry for 3 months was 3.29 times that of raw manure. The reason for this phenomenon is proliferation of methanogenic microorganisms in the biogas slurry produced after anaerobic fermentation treatment. Dissolved oxygen concentration is an important factor influencing the diversity and activity of microorganism population in biogas slurry and is also a key factor controlling bio-chemical reaction in biogas slurry, but no research and report on methane emission in the process of storing biogas slurry is specially aiming at the influence of dissolved oxygen concentration.
Disclosure of Invention
In order to solve the problems, the invention provides a method for reducing methane emission through micro-oxygen storage of biogas slurry in a livestock and poultry farm, and solves the problem of large gas emission of a methane isothermal chamber in the process of storing the livestock and poultry biogas slurry.
In order to achieve the technical aim, the invention provides a method for reducing methane emission through micro-oxygen storage of biogas slurry in a livestock and poultry farm, which comprises the following steps:
s1, the biogas slurry communication aeration switch automatic control system;
s2, setting aeration intensity through an aeration switch automatic control system so as to regulate and control the concentration of dissolved oxygen in the biogas slurry.
Preferably, the automatic control system of the aeration switch comprises an air compressor, an air filter, a gas mass flowmeter and a dissolved oxygen meter for the concentration of the dissolved oxygen of the biogas slurry.
Preferably, the dissolved oxygen meter monitors the concentration of dissolved oxygen in the biogas slurry in real time;
when the concentration of the dissolved oxygen in the biogas slurry is lower than a set value of the concentration of the dissolved oxygen in the biogas slurry, automatically performing aeration;
when the concentration of the dissolved oxygen in the biogas slurry is higher than the set value of the concentration of the dissolved oxygen in the biogas slurry, the aeration is stopped, and meanwhile, the segmented timer is used for automatically recording the aeration time.
Preferably, the biogas slurry is stored in the lower part of a storage barrel, a dynamic box is formed in the space of the upper part of the storage barrel, the storage barrel and the dynamic box are designed into a whole, the ventilation rate in the dynamic box is controlled through a gas mass flowmeter, a gas sample is collected at a gas outlet of the dynamic box, and the methane amount discharged by the biogas slurry is detected.
Preferably, the segment timer is an EST-CK segment timer.
Preferably, the dissolved oxygen meter is a TC-80 dissolved oxygen meter.
Preferably, the set value of the dissolved oxygen concentration in the biogas slurry is 1.0mg/L biogas slurry, and the set value of the aeration intensity is 20mL/L biogas slurry/min.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a method for reducing methane emission through micro-oxygen storage of biogas slurry in a livestock and poultry farm, which comprises the following steps: s1, the biogas slurry communication aeration switch automatic control system; s2, setting aeration intensity through an automatic control system of an aeration switch so as to regulate and control the concentration of dissolved oxygen in the biogas slurry, and solving the problem of large gas discharge amount of a methane isothermal chamber in the storage process of the livestock and poultry biogas slurry.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram showing the change of methane emission amount in the micro-oxygen storage process of the biogas slurry in the livestock and poultry farm in the embodiment 1 of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
The invention provides a method for reducing methane emission through micro-oxygen storage of biogas slurry in a livestock and poultry farm, which comprises the following steps:
s1, the biogas slurry communication aeration switch automatic control system;
s2, setting aeration intensity through an aeration switch automatic control system so as to regulate and control the concentration of dissolved oxygen in the biogas slurry.
Further, the automatic control system of the aeration switch comprises an air compressor, an air filter, a gas mass flowmeter and a dissolved oxygen meter for the concentration of the dissolved oxygen of the biogas slurry.
Further, the dissolved oxygen meter monitors the concentration of dissolved oxygen in the biogas slurry in real time;
when the concentration of the dissolved oxygen in the biogas slurry is lower than a set value of the concentration of the dissolved oxygen in the biogas slurry, automatically performing aeration;
when the concentration of the dissolved oxygen in the biogas slurry is higher than the set value of the concentration of the dissolved oxygen in the biogas slurry, the aeration is stopped, and meanwhile, the segmented timer is used for automatically recording the aeration time.
Further, the biogas slurry is stored in the lower part of the storage barrel, a dynamic box is formed in the space of the upper part of the storage barrel, the storage barrel and the dynamic box are designed into a whole, the ventilation rate in the dynamic box is controlled through a gas mass flowmeter, a gas sample is collected at a gas outlet of the dynamic box, and the methane amount discharged by the biogas slurry is detected.
Further, the segment timer is an EST-CK segment timer.
Further, the dissolved oxygen meter is a TC-80 dissolved oxygen meter.
Further, the set value of the dissolved oxygen concentration in the biogas slurry is 1.0mg/L biogas slurry, and the set value of the aeration intensity is 20mL/L biogas slurry/min.
Example 1: methane emission is reduced by micro-oxygen storage of biogas slurry in livestock farms:
The embodiment specifically and mainly comprises the following steps:
Biogas slurry storage device: the experiment is to store bucket and dynamic case design as an organic whole and carry out the experiment, stores the marsh liquid promptly and stores bucket lower part to guarantee the airtight state during the experiment, form the dynamic case through the space on storage bucket upper portion simultaneously, control the rate of taking a breath in the dynamic case through the gas mass flowmeter, gather gas sample in the dynamic case gas outlet, detect the methane volume that the marsh liquid discharged.
Controlling the concentration of dissolved oxygen in biogas slurry: the dissolved oxygen concentration of the biogas slurry is controlled by an automatic dissolved oxygen control system formed by combining an air compressor, an air filter, a gas mass flowmeter and a T80 dissolved oxygen meter, namely, the dissolved oxygen concentration in the biogas slurry is monitored in real time through the T80 dissolved oxygen meter, when the dissolved oxygen concentration in the biogas slurry is lower than a set value, aeration is automatically performed, when the dissolved oxygen concentration in the biogas slurry is higher than the set value, the aeration is stopped, and meanwhile, the aeration time is automatically recorded by using an EST-CK segmented timer.
Micro-oxygen environmental parameters: the concentration of dissolved oxygen in the biogas slurry is set to be 1.0mg/L biogas slurry, and the aeration strength is set to be 20mL/L biogas slurry/min.
The change chart of the methane discharge amount of the continuous storage of the biogas slurry in different environments of the livestock and poultry farm is shown in figure 1, the accumulated discharge flux of methane stored without aeration of the biogas slurry is 204.13g/m 3, the accumulated discharge flux of methane stored by micro-oxygen of the biogas slurry is 49.58g/m 3, and the methane discharge amount is reduced by 76%.
The invention provides a method for reducing methane emission through micro-oxygen storage of biogas slurry in a livestock and poultry farm, which comprises the following steps: s1, the biogas slurry communication aeration switch automatic control system; s2, setting aeration intensity through an automatic control system of an aeration switch so as to regulate and control the concentration of dissolved oxygen in the biogas slurry, and solving the problem of large gas discharge amount of a methane isothermal chamber in the storage process of the livestock and poultry biogas slurry.
It should be noted that: like reference numerals and letters in the following figures denote like items, and thus once an item is defined in one figure, no further definition or explanation of it is required in the following figures, and furthermore, the terms "first," "second," "third," etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the corresponding technical solutions. Are intended to be encompassed within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A method for reducing methane emission by micro-oxygen storage of biogas slurry in a livestock farm, comprising the steps of:
s1, the biogas slurry communication aeration switch automatic control system;
s2, setting aeration intensity through an aeration switch automatic control system so as to regulate and control the concentration of dissolved oxygen in the biogas slurry.
2. The method for reducing methane emissions by micro-oxygen storage of livestock and poultry farm biogas slurry according to claim 1, wherein the automatic control system of the aeration switch comprises an air compressor, an air filter, a gas mass flowmeter, and a dissolved oxygen meter for the concentration of the dissolved oxygen of the biogas slurry.
3. The method for reducing methane emissions by micro-oxygen storage of livestock farm biogas slurry according to claim 2, wherein the dissolved oxygen meter monitors the dissolved oxygen concentration in the biogas slurry in real time;
when the concentration of the dissolved oxygen in the biogas slurry is lower than a set value of the concentration of the dissolved oxygen in the biogas slurry, automatically performing aeration;
when the concentration of the dissolved oxygen in the biogas slurry is higher than the set value of the concentration of the dissolved oxygen in the biogas slurry, the aeration is stopped, and meanwhile, the segmented timer is used for automatically recording the aeration time.
4. The method for reducing methane emission by micro-oxygen storage of biogas slurry in livestock and poultry farms according to claim 1, wherein the biogas slurry is stored in the lower part of a storage barrel, a dynamic tank is formed in the space of the upper part of the storage barrel, the storage barrel and the dynamic tank are designed as a whole, the ventilation rate in the dynamic tank is controlled by a gas mass flowmeter, a gas sample is collected at the gas outlet of the dynamic tank, and the methane amount discharged by the biogas slurry is detected.
5. The method for reducing methane emissions by micro-oxygen storage of livestock and poultry farm biogas slurry according to claim 3, wherein the segment timer is an EST-CK segment timer.
6. The method for reducing methane emissions by micro-oxygen storage of livestock and poultry farm biogas slurry according to claim 2, wherein the dissolved oxygen meter is a TC-80 dissolved oxygen meter.
7. The method for reducing methane emissions by micro-oxygen storage of livestock and poultry farm biogas slurry according to claim 1, wherein the dissolved oxygen concentration in the biogas slurry is set to 1.0mg/L biogas slurry, and the aeration intensity is set to 20mL/L biogas slurry/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410217643.5A CN118108330A (en) | 2024-02-28 | 2024-02-28 | Method for reducing methane emission through micro-oxygen storage of biogas slurry in livestock and poultry farm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410217643.5A CN118108330A (en) | 2024-02-28 | 2024-02-28 | Method for reducing methane emission through micro-oxygen storage of biogas slurry in livestock and poultry farm |
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| Publication Number | Publication Date |
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| CN118108330A true CN118108330A (en) | 2024-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410217643.5A Pending CN118108330A (en) | 2024-02-28 | 2024-02-28 | Method for reducing methane emission through micro-oxygen storage of biogas slurry in livestock and poultry farm |
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| Country | Link |
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| CN (1) | CN118108330A (en) |
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- 2024-02-28 CN CN202410217643.5A patent/CN118108330A/en active Pending
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