CN102352309A - Electrolytically promoted anaerobic fermentation apparatus and application method thereof - Google Patents
Electrolytically promoted anaerobic fermentation apparatus and application method thereof Download PDFInfo
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- 238000005868 electrolysis reaction Methods 0.000 claims description 33
- 239000007789 gas Substances 0.000 claims description 29
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 26
- 238000013022 venting Methods 0.000 claims description 22
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
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- 239000008188 pellet Substances 0.000 claims description 3
- 229910003446 platinum oxide Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 238000006731 degradation reaction Methods 0.000 abstract description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
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Abstract
The invention relates to an electrolytically promoted anaerobic fermentation apparatus and an application method thereof, which belong to the technical field of resources and environment. The electrolytically promoted anaerobic fermentation apparatus mainly comprises a fermentation tank (1), a tank seal (2) and an exhaust outlet (7), the tank seal (2) is positioned on the fermentation tank (1) and used for sealing the opening of the fermentation tank (1), and the exhaust outlet (7) makes a hole on the tank seal (2) and is inserted into the hole. The electrolytically promoted anaerobic fermentation apparatus is characterized in that: the electrolytically promoted anaerobic fermentation apparatus also comprises an anode (4), a cathode (5), a direct-current power supply (9) and wires (8), the direct-current power supply (9) is arranged outside the fermentation tank (1), and the two wires (8) respectively pass through the tank seal (2) to extend into the fermentation tank (1), and are respectively connected with the anode (4) and the cathode (5) arranged in the fermentation tank (1). In order to solve the problem that straws and other complex organic matters are hard to degrade and that biogas contains poisonous gas, the invention utilizes the low-voltage direct-current power supply the electrolyze water to provide an aerobic microenvironment needed by the degradation of straws and the like. H2S in biogas carries out oxidation reaction on the anode, so that sulfur can be removed, and thereby the produced biogas can be directly burnt without passing through a desulfurizer.
Description
Technical field
The present invention relates to a kind of electrolysis and promote anaerobic ferment devices and application method thereof, belong to the resource and environment technical field.
Background technology
Because energy demand increases day by day and the mass consumption of fossil oil, has caused the interest of people to renewable energy source.Methane is pollution-free, renewable, be a kind of desirable energy that can develop.Methane is produced in straw anaerobic digestion not only can alleviate energy pressure, can also solve stalk and directly burn the problem of environmental pollution that is brought, and has very high economic worth.The residing strictly anaerobic environment of biogas fermentation is unfavorable for complicated organic degradeds such as stalk, and the hydrogen sulfide that produces severe toxicity, has limited the direct utilization of biogas.
The anaerobically fermenting of biogas is divided into three phases: hydrolysis of organic matter, product acid, product methane phase.And the hydrolysis of organic matter process, it is actually a little aerobic process, and the strictly anaerobic condition of product methane phase is unfavorable for organic hydrolysis.Feeding certain impressed voltage can produce oxygen and hydrogen continuously; Oxygen provides little aerobic environment, promotes organic hydrolysis in the stalk, reduces the content of hydrogen sulfide in the biogas; The hydrogen that electrolysis produces partly spills in the biogas, can improve the combustionproperty of biogas, and another part hydrogen can be converted to methane by the hydrogen nutritional type methanobacteria in the fermentation system, improves the productive rate of methane.
Summary of the invention
One of technical purpose of the present invention is to provide a kind of electrolysis to promote the device of anaerobically fermenting, makes this device to be controlled at minimum level through oxygen content in the big young pathbreaker's biogas of control impressed voltage.
Another technical purpose of the present invention is to provide the application method of said apparatus; It relates generally to complicated organic matter degradation difficulties such as solving stalk and biogas contains the technical problem of toxic gas (mainly being hydrogen sulfide), and can utilize the low-voltage dc power supply brine electrolysis that the required little aerobic environments of degraded such as stalk are provided.
In order to realize technical purpose of the present invention, technical scheme of the present invention is following.
One, a kind of electrolysis promotes anaerobic ferment devices; Mainly by fermentation tank body 1, be positioned at the envelope jar mouth 2 that is used to seal its jar mouth on the fermentation tank body 1; And, it is characterized in that also comprising anode 4, negative electrode 5, direct supply 9 and electric wire 8 sealing venting port 7 formations that perforate is also inserted on jar mouth 2; Direct supply 9 is arranged on outside the fermentation tank body 1, passes envelope jar mouth 2 respectively through two wires 8 and stretches into tank body 1 inside and connect anode 4 and the negative electrode 5 that is arranged on tank body 1 inside respectively.
Further, described male or female is a pellet electrode.
Further, described anode is interpreted as the anode that any inert material makes in the prior art, in the present invention, includes but not limited to: graphite, platinum or metal oxide containing precious metals.
Described negative electrode is interpreted as the negative electrode that any electro-conductive material makes in the prior art, in the present invention, includes but not limited to: copper, stainless steel, aluminium, silver or titanium.
Further, described electrolysis promotes that anaerobic ferment devices also comprises material taking mouth 3, and material taking mouth 3 is that the one of which end inserts the bottom of fermentation tank body 1 through the conduit of envelope jar mouth 2, and an end stretches out envelope jar mouth 2.Its objective is and make things convenient in the device operating process at any time feed liquid to carry out sampling analysis fermentation system.
Further, also be connected with threeway on the described venting port 7, threeway one end is connected with venting port 7, and an end plug is gone into sealing plug 6, and the other end connects the tolerance proofing unit.An end that is plugged with sealing plug 6 can make things convenient for the gas that at any time fermentation system is produced to carry out sampling analysis as air hatch.The purpose that connects the tolerance proofing unit is total gas production rate after each batch of detection fermentation ends, to detect the gas deliverability of fermentation system.
Two, electrolysis of the present invention promotes the application method of anaerobic ferment devices.
In the present invention, relate generally to the method for utilizing electrolysis of the present invention to promote the anaerobic ferment devices producing methane through anaerobic fermentation, it is characterized in that may further comprise the steps:
(1) open the envelope jar mouth 2 that electrolysis promotes the device of anaerobically fermenting, the stalk and the natural pond liquid that in its fermentation tank body 1, add after pulverizing make that solid masses content is 6～8%; Stalk and an amount of active sludge after perhaps add pulverizing, active sludge accounts for 30%～40% of stalk quality dry weight, and adding entry, to make solid content be 6～8%; Install envelope jar mouth 2 and venting port 7, anode 4, negative electrode 5, direct supply 9 and electric wire 8;
(2) open direct supply 9, keep impressed voltage 2.5～3.5 V, guarantee oxygen content, promptly do not influence the activity of methanobacteria, again little aerobic environment can be provided below 1%; Fermentation unit is placed the water-bath device, make leavening temperature maintain 35～40 ℃, begin fermentation gas, and collect biogas and detect gas production rate through venting port 7.
Further, described stalk diameter becomes thread or sheet below 5 cm.
Technique effect of the present invention is:
(1) this anaerobic digestion device is made simply, and cost is low, is applicable to the research of electrolysis to the anaerobically fermenting influence.
(2) in order to solve the problem that complicated organic matter degradation difficulty such as stalk and biogas contain toxic gas (mainly being hydrogen sulfide), the present invention utilizes the low-voltage dc power supply brine electrolysis that the required little aerobic environments of degraded such as stalk are provided.For fear of the restraining effect of oxygen to anaerobic metabolism, the present invention adopts the impressed voltage of 2.5～3.5 V, and oxygen content is controlled at minimum level.The hydrogen that electrolysis produced can be by hydrogen nutritional type methanobacteria metabolism utilization, thereby has improved the content of methane in the biogas.H in the biogas
2S is in anode generation oxidizing reaction, and then reaches the purpose of desulfurization, and the biogas that is produced need not can directly burn through desulfurizer.
Description of drawings
Fig. 1 is the structural representation that electrolysis according to the invention promotes anaerobic ferment devices.
Wherein, 1-fermentation tank body; 2-envelope jar mouth; The 3-material taking mouth; The 4-anode; The 5-negative electrode; The 6-sealing plug; The 7-venting port; The 8-electric wire; The 9-direct supply.
Fig. 2 is embodiment 2 daily gas quantitative change data plots.
Fig. 3 is the methane content delta data figure of output gas among the embodiment 2.
Fig. 4 is embodiment 2 cumulative gas production delta data figure.
Embodiment
Present embodiment illustrates that electrolysis of the present invention promotes the structure of anaerobic ferment devices.
As shown in Figure 1, electrolysis of the present invention promotes the device of anaerobically fermenting, mainly by fermentation tank body 1, be positioned at the envelope jar mouth 2 that is used to seal its jar mouth on the fermentation tank body 1, and perforate and the venting port 7 that inserts constitute on envelope jar mouthfuls 2; This device also comprises anode 4, negative electrode 5, direct supply 9 and electric wire 8; Direct supply 9 is arranged on outside the fermentation tank body 1, passes envelope jar mouth 2 respectively through two wires 8 and stretches into tank body 1 inside and connect anode 4 and the negative electrode 5 that is arranged on tank body 1 inside respectively.
Further, described male or female is a pellet electrode.
Further, described anode is interpreted as the anode that any inert material makes in the prior art, in the present invention, includes but not limited to: graphite, platinum or metal oxide containing precious metals etc.
Described negative electrode is interpreted as the negative electrode that any electro-conductive material makes in the prior art, in the present invention, includes but not limited to: copper, stainless steel, aluminium, silver or titanium etc.
Further, described electrolysis promotes that anaerobic ferment devices also comprises material taking mouth 3, and material taking mouth 3 is that the one of which end inserts the bottom of fermentation tank body 1 through the conduit of envelope jar mouth 2, and an end stretches out envelope jar mouth 2.Its objective is and make things convenient in the device operating process at any time feed liquid to carry out sampling analysis fermentation system.
Further, also be connected with threeway on the described venting port 7, threeway one end is connected with venting port 7, and an end plug is gone into sealing plug 6, and the other end connects the tolerance proofing unit.An end that is plugged with sealing plug 6 can make things convenient for the gas that at any time fermentation system is produced to carry out sampling analysis as air hatch.The purpose that connects the tolerance proofing unit is total gas production rate after each batch of detection fermentation ends, to detect the gas deliverability of fermentation system.
Present embodiment is a method of utilizing embodiment 1 described device producing methane through anaerobic fermentation.
(1) gets the fermentation tank body of 1 L, open the envelope jar mouth 2 that electrolysis promotes the device of anaerobically fermenting, in its fermentation tank body 1, add 30 g and pulverize to filamentous stalk of 2cm and 770 mL natural pond liquid and make that solid masses content is 6%; Install envelope jar mouth 2 and venting port 7, anode 4, negative electrode 5, direct supply 9 and electric wire 8; With graphite is that anode, copper are negative electrode, and electrode distance is 3 cm.
(2) open direct supply 9, keep impressed voltage 2.5 V, guarantee oxygen content, promptly do not influence the activity of methanobacteria, again little aerobic environment can be provided below 1%; Fermentation unit is placed the water-bath device, make leavening temperature maintain 37 ℃, begin fermentation gas, and collect biogas and detect gas production rate through venting port 7.Fermenting, gas production rate obviously reduces after 11 days, stops fermentation this moment.
With same fermentation condition but the simple anaerobically fermenting of non-additional electrodes and voltage as one group of contrast, measure daily output tolerance (Fig. 2), methane content changes (Fig. 3), cumulative gas (Fig. 4) and hydrogen sulfide content.Hydrogen sulfide content adopts GB/T 11060.1-1998 method to measure, and the result is 0%, and control group is 0.203%.The result shows, adds low-voltage dc power supply and not only can promote biogas fermentation, improves the biogas quality, can also remove toxic gas hydrogen sulfide etc. in the biogas.
Present embodiment is a method of utilizing embodiment 1 described device producing methane through anaerobic fermentation.
(1) gets the fermentation tank body of 10 L, open the envelope jar mouth 2 that electrolysis promotes the device of anaerobically fermenting, in its fermentation tank body 1, add 300 g and be ground into the flaky stalk of 5cm, 120 g active sludge and water, make that solid masses content is 8%; Install envelope jar mouth 2 and venting port 7, anode 4, negative electrode 5, direct supply 9 and electric wire 8; With the metal oxide containing precious metals is that anode, stainless steel are negative electrode, and electrode distance is 0.5 cm.
(2) open direct supply 9, keep impressed voltage 2.5 V, guarantee oxygen content, promptly do not influence the activity of methanobacteria, again little aerobic environment can be provided below 1%; Fermentation unit is placed the water-bath device, make leavening temperature maintain 35 ℃, begin fermentation gas, and collect biogas and detect gas production rate through venting port 7.Fermenting, gas production rate obviously reduces after 15 days, stops fermentation this moment.
Compare with control group, add low-voltage dc power supply and not only can promote biogas fermentation, improve the biogas quality, also can remove toxic gas hydrogen sulfide etc. (being hydrogen sulfide content 0% in the gas) in the biogas equally.
Present embodiment changes correlation parameter with embodiment 2.
(1) gets the fermentation tank body of 20 L, open the envelope jar mouth 2 that electrolysis promotes the device of anaerobically fermenting, add in its fermentation tank body 1 that 600 g are ground into the filamentous stalk of 3cm and natural pond liquid makes that solid masses content is 7%; Install envelope jar mouth 2 and venting port 7, anode 4, negative electrode 5, direct supply 9 and electric wire 8; With the platinum is that anode, aluminium are negative electrode, and electrode distance is 3 cm.
(2) open direct supply 9, keep impressed voltage 3 V, guarantee oxygen content, promptly do not influence the activity of methanobacteria, again little aerobic environment can be provided below 1%; Fermentation unit is placed the water-bath device, make leavening temperature maintain 40 ℃, begin fermentation gas, and collect biogas and detect gas production rate through venting port 7.Fermenting, gas production rate obviously reduces after 15 days, stops fermentation this moment.
Compare with control group, add low-voltage dc power supply and not only can promote biogas fermentation, improve the biogas quality, also can remove toxic gas hydrogen sulfide etc. (being hydrogen sulfide content 0% in the gas) in the biogas equally.
Present embodiment changes correlation parameter with embodiment 2.
(1) gets the fermentation tank body of 1 L, open the envelope jar mouth 2 that electrolysis promotes the device of anaerobically fermenting, in its fermentation tank body 1, add stalk, 9 g active sludge and the water that 30 g are ground into the segment of 2 cm, make that solid masses content is 6%; Install envelope jar mouth 2 and venting port 7, anode 4, negative electrode 5, direct supply 9 and electric wire 8; With graphite is that anode, silver are negative electrode, and electrode distance is 0.5 cm.
(2) open direct supply 9, keep impressed voltage 3.5 V, guarantee oxygen content, promptly do not influence the activity of methanobacteria, again little aerobic environment can be provided below 1%; Fermentation unit is placed the water-bath device, make leavening temperature maintain 37 ℃, begin fermentation gas, and collect biogas and detect gas production rate through venting port 7.Fermenting, gas production rate obviously reduces after 15 days, stops fermentation this moment.
Compare with control group, add low-voltage dc power supply and not only can promote biogas fermentation, improve the biogas quality, also can remove toxic gas hydrogen sulfide etc. (being hydrogen sulfide content 0% in the gas) in the biogas equally.
Claims (9)
1. an electrolysis promotes anaerobic ferment devices; Mainly by fermentation tank body (1), be positioned at the envelope jar mouth (2) that is used to seal its jar mouth on fermentation tank body (1); And, it is characterized in that also comprising anode (4), negative electrode (5), direct supply (9) and electric wire (8) in venting port (7) formation that envelope jar mouthful (2) is gone up perforate and inserted; Direct supply (9) is arranged on outside the fermentation tank body (1), passes envelope jar mouthful (2) respectively through two wires (8) and stretches into tank body (1) inside and connect anode (4) and the negative electrode (5) that is arranged on tank body (1) inside respectively.
2. electrolysis according to claim 1 promotes the device of anaerobically fermenting, it is characterized in that described male or female is a pellet electrode.
3. electrolysis according to claim 1 promotes anaerobic ferment devices, it is characterized in that described anode is graphite, platinum or metal oxide containing precious metals.
4. electrolysis according to claim 1 promotes anaerobic ferment devices, it is characterized in that described negative electrode is copper, stainless steel, aluminium, silver or titanium.
5. electrolysis according to claim 1 promotes anaerobic ferment devices; It is characterized in that described electrolysis promotes the device of anaerobically fermenting also to comprise material taking mouth (3); Material taking mouth (3) is the conduit through envelope jar mouthful (2); The one of which end inserts the bottom of fermentation tank body (1), and an end stretches out envelope jar mouthful (2).
6. electrolysis according to claim 1 promotes anaerobic ferment devices, it is characterized in that also being connected with threeway on the described venting port (7), and threeway one end is connected with venting port (7), and an end plug is gone into sealing plug (6), and the other end connects the tolerance proofing unit.
7. the described electrolysis of claim 1 promotes the application method of anaerobic ferment devices, it is characterized in that it being the method that described electrolysis promotes the device producing methane through anaerobic fermentation of anaerobically fermenting.
8. electrolysis according to claim 7 promotes the application method of anaerobic ferment devices, it is characterized in that may further comprise the steps:
(1) open the envelope jar mouth (2) that electrolysis promotes the device of anaerobically fermenting, the stalk and the natural pond liquid that in its fermentation tank body (1), add after pulverizing make that solid masses content is 6～8%; Stalk and an amount of active sludge after perhaps add pulverizing, active sludge accounts for 30%～40% of stalk quality dry weight, and adding entry, to make solid content be 6～8%; Install envelope jar mouthful (2) and venting port (7), anode (4), negative electrode (5), direct supply (9) and electric wire (8);
(2) open direct supply (9), keep impressed voltage 2.5～3.5 V, guarantee that oxygen content is below 1%; Leavening temperature maintains 35～40 ℃, begins fermentation gas, and collects biogas and detect gas production rate through venting port (7).
9. electrolysis according to claim 8 promotes the application method of anaerobic ferment devices, it is characterized in that described stalk diameter below 5 cm, becomes thread or sheet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110322582.1A CN102352309B (en) | 2011-10-21 | 2011-10-21 | Electrolytically promoted anaerobic fermentation apparatus and application method thereof |
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| CN201110322582.1A CN102352309B (en) | 2011-10-21 | 2011-10-21 | Electrolytically promoted anaerobic fermentation apparatus and application method thereof |
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| CN102352309A true CN102352309A (en) | 2012-02-15 |
| CN102352309B CN102352309B (en) | 2014-03-19 |
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| CN102533872A (en) * | 2012-02-29 | 2012-07-04 | 昆明理工大学 | Method for fermenting solid waste to produce gas |
| CN103589633A (en) * | 2013-11-11 | 2014-02-19 | 哈尔滨工业大学 | Two-section anaerobic fermentation device and method for producing methane by performing anaerobic fermentation by device |
| CN104178417A (en) * | 2013-05-28 | 2014-12-03 | 中国科学院城市环境研究所 | Microbial electric assistant anaerobic baffling fermentation hydrogen production reactor |
| CN105601070A (en) * | 2016-01-13 | 2016-05-25 | 长沙上意电子科技有限公司 | Organic waste anaerobic digestion-microbial electrolysis coupling reaction system and method thereof |
| CN106480102A (en) * | 2016-10-25 | 2017-03-08 | 长沙加中环保科技有限公司 | A kind of method for improving methane production using electrolysis auxiliary anaerobe |
| CN107142285A (en) * | 2017-06-30 | 2017-09-08 | 江苏大学 | A kind of method that coupling producing methane through anaerobic fermentation is electrolysed based on carbon electrode |
| CN107140788A (en) * | 2017-05-31 | 2017-09-08 | 安徽永志环能科技有限公司 | Livestock and poultry cultivation night soil fermentation processing method |
| CN110423680A (en) * | 2019-07-29 | 2019-11-08 | 山东大学 | Biogas and biological methane survey the device and its measurement method of gas in real time in a kind of anaerobic fermentation |
| CN112939393A (en) * | 2021-03-05 | 2021-06-11 | 太原理工大学 | Device for producing caproic acid by sludge electric fermentation without electron donor and synchronously separating |
| CN113387435A (en) * | 2021-06-16 | 2021-09-14 | 青岛科技大学 | Anaerobic digestion promotion method |
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| CN102533872A (en) * | 2012-02-29 | 2012-07-04 | 昆明理工大学 | Method for fermenting solid waste to produce gas |
| CN104178417A (en) * | 2013-05-28 | 2014-12-03 | 中国科学院城市环境研究所 | Microbial electric assistant anaerobic baffling fermentation hydrogen production reactor |
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| CN105601070A (en) * | 2016-01-13 | 2016-05-25 | 长沙上意电子科技有限公司 | Organic waste anaerobic digestion-microbial electrolysis coupling reaction system and method thereof |
| CN106480102A (en) * | 2016-10-25 | 2017-03-08 | 长沙加中环保科技有限公司 | A kind of method for improving methane production using electrolysis auxiliary anaerobe |
| CN107140788A (en) * | 2017-05-31 | 2017-09-08 | 安徽永志环能科技有限公司 | Livestock and poultry cultivation night soil fermentation processing method |
| CN107142285A (en) * | 2017-06-30 | 2017-09-08 | 江苏大学 | A kind of method that coupling producing methane through anaerobic fermentation is electrolysed based on carbon electrode |
| CN110423680A (en) * | 2019-07-29 | 2019-11-08 | 山东大学 | Biogas and biological methane survey the device and its measurement method of gas in real time in a kind of anaerobic fermentation |
| CN112939393A (en) * | 2021-03-05 | 2021-06-11 | 太原理工大学 | Device for producing caproic acid by sludge electric fermentation without electron donor and synchronously separating |
| CN112939393B (en) * | 2021-03-05 | 2023-10-03 | 太原理工大学 | Device for realizing caproic acid production and synchronous separation of sludge by electrofermentation without electron donor |
| CN113387435A (en) * | 2021-06-16 | 2021-09-14 | 青岛科技大学 | Anaerobic digestion promotion method |
| CN113493733A (en) * | 2021-06-17 | 2021-10-12 | 东北农业大学 | Electrolytic cell-anaerobic fermentation integral type mixed anaerobic fermentation device |
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Inventor after: Li Hui Inventor after: Xue Jinhong Inventor after: Liu Xiujuan Inventor after: Niu Xiao Inventor after: Zhang Yabing Inventor after: Jia Honghua Inventor after: Wei Ping Inventor after: Ouyang Pingkai Inventor before: Li Hui Inventor before: Xue Jinhong Inventor before: Liu Xiujuan Inventor before: Niu Xiao Inventor before: Zhang Yabing Inventor before: Wei Ping Inventor before: Ouyang Pingkai |
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