CN101591677A - Pure straw stackretting-free feeding methane fermentation method - Google Patents
Pure straw stackretting-free feeding methane fermentation method Download PDFInfo
- Publication number
- CN101591677A CN101591677A CNA2009101575325A CN200910157532A CN101591677A CN 101591677 A CN101591677 A CN 101591677A CN A2009101575325 A CNA2009101575325 A CN A2009101575325A CN 200910157532 A CN200910157532 A CN 200910157532A CN 101591677 A CN101591677 A CN 101591677A
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- Prior art keywords
- methane
- generating pit
- day
- natural pond
- intake
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000855 fermentation Methods 0.000 title claims abstract description 47
- 230000004151 fermentation Effects 0.000 title claims abstract description 45
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000010902 straw Substances 0.000 title claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000002893 slag Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000003203 everyday effect Effects 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000007921 spray Substances 0.000 claims abstract description 15
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 8
- 235000021050 feed intake Nutrition 0.000 claims abstract description 7
- 238000003860 storage Methods 0.000 claims abstract description 5
- 206010019114 Hand fracture Diseases 0.000 claims abstract description 3
- 230000001580 bacterial effect Effects 0.000 claims abstract description 3
- 238000007599 discharging Methods 0.000 claims description 6
- 238000011081 inoculation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 7
- 239000002253 acid Substances 0.000 description 5
- 150000007524 organic acids Chemical class 0.000 description 4
- 238000003756 stirring Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- LPQOADBMXVRBNX-UHFFFAOYSA-N ac1ldcw0 Chemical compound Cl.C1CN(C)CCN1C1=C(F)C=C2C(=O)C(C(O)=O)=CN3CCSC1=C32 LPQOADBMXVRBNX-UHFFFAOYSA-N 0.000 description 1
- -1 acetate Chemical compound 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to biogas fermentation method, particularly a kind of pure straw stackretting-free feeding methane fermentation method.This method is: zymotechnique starts routinely, with the preferred natural pond of bacterial classification slag stalk is inoculated, is fed intake, and adds water at 9: 1 by ratio of water to material, and water material to be added accounts for and stops pan feeding when methane-generating pit always ferments volume 10%, waits for aerogenesis; Behind the normal gas producing, stalk broken hand hay cutter or blue or green storage feeds intake by the multiple feed mode, and only fed intake by an opening for feed every day, changed next opening for feed in second day to feed intake, with this by day feeding intake by a mouthful circulation; The methane-generating pit inner top is equipped with a plurality of shower nozzles, and scum pump is set at the bottom of the pond, by scum pump the natural pond liquid of methane-generating pit bottom is transported to shower nozzle by liquid-transport pipe-line, sprays entering the fermentation raw material that floats over liquid top, natural pond in the methane-generating pit, makes raw material acidifying neutralization; Discharge a certain amount of useless natural pond slag that has fermented and finished by the inlet amount on the same day by the methane-generating pit bottom every day.The present invention compares with the ordinary method fermentation, and gas production rate can improve 30-40%.
Description
Technical field:
The present invention relates to biogas fermentation method, particularly a kind of pure straw stackretting-free feeding methane fermentation method.
Background technology:
Conventional biogas anaerobic fermentation must carry out stack retting to fermentation raw material.Conventional biogas fermentation theory thinks that the C/N of fermentation raw material is than carrying out smoothly at 25: 1 o'clock biogas fermentations.The C/N ratio of stalk is 75: 1, carries out biogas fermentation with stalk, and C/N is higher than too, and such fermentation raw material can violent produce acid and aerogenesis not after stack retting does not advance as marsh gas fermentation pool, also can not produce any degraded.Therefore, before raw material enters methane-generating pit, must carry out stack retting, particularly stalk, come the wherein a part of C element of oxygen consumption, thereby reduce C/N ratio, reach the C/N ratio of theoretical fermentation, fermentation is carried out by stack retting.But owing to the monose in the raw material, starch being decomposed easily product acid, material consumption has been fallen, Mierocrystalline cellulose, xylogen that only remaining decomposition is slow, product acid is also slow, thereby such stack retting material gas production rate will reduce 30-40%.In addition, the fermentation material that enters methane-generating pit mixes the purpose that reaches its inoculation for abundant and the original natural pond of methane-generating pit slag, and methane-generating pit also must be equipped with agitator.Because the reactive force of natural pond slag is very big, whipping appts is all very heavy, consumes great deal of steel, and corrosion is strong, and power consumption is bigger during stirring.Also have, virgin material mixes with old material is in the same place, and the natural pond slag of discharging when discharging can contain the virgin material that has not much produced gas, has promptly wasted resource, does not also reach emission standard, can cause new pollution.For solving the above-mentioned drawback of bringing because of stirring, can only in fermentation raw material, add a large amount of water, to reduce the resistance of feed liquid.And a large amount of addings of moisture content have accounted for the fermentation volume, and gas production rate is subtracted greatly, and a large amount of addings of moisture content also can reduce leavening temperature, must take assisted heating device to keep normal leavening temperature.
Summary of the invention:
The present invention is intended to solve conventional biogas fermentation method and will carries out stack retting, stirring, add moisture and the drawback brought in a large number raw material, and a kind of pure straw stackretting-free feeding methane fermentation method is provided.
The technical solution used in the present invention is: a kind of pure straw stackretting-free feeding methane fermentation method, and this method is:
A, methane-generating pit start: zymotechnique routinely, with the preferred natural pond of bacterial classification slag to the stalk inoculation, feed intake, add water at 9: 1 by ratio of water to material, water material to be added accounts for and stops pan feeding when methane-generating pit always ferments volume 10%, the wait aerogenesis;
Behind b, the normal gas producing, stalk broken hand hay cutter or blue or green storage feeds intake by the multiple feed mode: methane-generating pit top evenly is provided with several opening for feeds, and only fed intake by an opening for feed every day, changed next opening for feed in second day to feed intake, with this by day feeding intake by a mouthful circulation;
C, spray neutralization: the methane-generating pit inner top is equipped with a plurality of shower nozzles, scum pump is set at the bottom of the pond, by scum pump the natural pond liquid of methane-generating pit bottom is transported to shower nozzle by liquid-transport pipe-line, spray, make raw material acidifying neutralization entering the fermentation raw material that floats over liquid top, natural pond in the methane-generating pit;
D, quantitative discharging: discharge a certain amount of useless natural pond slag that has fermented and finished by the inlet amount on the same day by the methane-generating pit bottom every day.
Fermentation principle of the present invention is described as follows: enter uppermost pure stalk between biogas fermentation through feeding intake by a mouthful circulation by the sky, in the pond more than 50 ℃ under the leavening temperature effect, the strong acidifying of meeting, produce lactic acid, organic acids such as acetate, the present invention utilizes spray equipment that alkaline natural pond liquid is sprayed on the acidated fermentation raw material, during spray, the organic acid that alkalescence natural pond liquid produces the high fermentation raw material has carried out partly neutralization, and a large amount of organic acids that unnecessary neutralization is not finished dissolve, along spray descending middle part and the bottom that enters into the vigorous sweathouse of aerogenesis of liquid, natural pond, the zymophyte here is because the raw material nutrient of itself is idle most to decompose, be in starvation, and the top organic acid that gets off along spray liquid is kept the food of its life just, will resolve into biogas very soon, can not cause the acidifying of middle and lower part.Because biogas fermentation is a successive, there is every day new raw material to enter into the methane-generating pit the superiors, also there is every day a certain amount of natural pond slag to discharge from the methane-generating pit bottom, fermentation raw material constantly moves down, the raw material that newly enters sweathouse can the slowly descending mid-way that enters into sweathouse, because the acid that the violent material of the wherein a large amount of product of decomposition easily acid produces is sprayed natural pond liquid and is taken away, raw material properties stack retting outside the pond, do not have the acidifying possibility again, the biogas bacterium can be gone round and begun again in its breeding growth, continuously ferment, continuous aerogenesis, continuously feeding, discharging continuously.
In sum, the present invention compared with prior art, its outstanding feature and effect are: utilize simple, low-cost device input (spray equipment), the consumption of the low energy, solved stalk in advance stack retting reenter methane-generating pit, must be equipped with big energy consumption whipping device, must in fermentation raw material, add large quantity of moisture, must take assisted heating device to keep the indeterminable always problems of conventional biogas anaerobic fermentation technology such as normal leavening temperature.And same fermentation raw material is compared with the ordinary method fermentation by the inventive method fermentation, and gas production rate can improve 30-40%.
Embodiment:
Below in conjunction with embodiment in detail the present invention is described in detail.
Present embodiment is an example explanation pure straw stackretting-free feeding methane fermentation method of the present invention with one 6 kilostere volumetrical methane-generating pit.20 meters of 6 kilostere methane-generating pit diameters, high 20 meters, 15 meters of below grounds, above 5 meters of ground evenly is provided with 8 opening for feeds along circumference, 30 centimetres of opening for feed diameters topmost at the methane-generating pit Cylinder, establish spiral promoting shaft in the supply pipe, fermentation raw material is advanced methane-generating pit by spiral promoting shaft.
When methane-generating pit started, zymotechnique carried out routinely, promptly with the natural pond slag stalk stack retting was inoculated, and dropped into methane-generating pit then, added water at 9: 1 by ratio of water to material, and water material to be added accounts for and stops pan feeding when methane-generating pit always ferments volume 10% (about 600 cubic metres), waited for aerogenesis.
Behind the normal gas producing, the stalk of green grass or young crops storage is fed intake by the multiple feed mode: only fed intake by an opening for feed every day, changing next opening for feed in second day feeds intake, feed intake by a mouthful circulation by the sky with this, feed intake 150 tons every day, be converted into about 300 cubic metres of volume, heat continuously, keep 53 ℃-56 ℃ of leavening temperatures with sun power.Enter 300 cubic metres of fermentation raw materials in every day, when producing 2400 cubic metres of biogas in 24 hours, the fermentation raw material that newly enters needs nearly one month time, could topmost (on every day, closely expect from methane-generating pit, under the prerequisite of following while discharging) move to the methane-generating pit bottom, become not aerogenesis or aerogenesis seldom, emit when the natural pond slag that does not have again aerogenesis to be worth is treated slagging.
Be no less than 100 shower nozzles even installation of methane-generating pit inner top, scum pump is set at the bottom of the pond, by scum pump the natural pond liquid of methane-generating pit bottom is transported to shower nozzle by liquid-transport pipe-line, spray entering the fermentation raw material that floats over liquid top, natural pond in the methane-generating pit, spray once every day, and each 2 hours, spouting liquid was controlled at about 20, spray is made every effort to evenly, makes raw material acidifying neutralization.
By 300 cubic metres of calculating of above-mentioned inlet amount every day, fermentation raw material has produced gas and has become 50 cubic metres of natural pond slags.Corresponding above-mentioned opening for feed is provided with 8 discharge ports equally at the methane-generating pit bottommost, and discharge the about 50 cubic metre useless natural pond slags that fermented finish by corresponding discharge port every day.
The stalk fermentation raw material of blue or green storage generally contains moisture more than 70%, becomes natural pond slag volume by fermentation and can reduce 2/3, and natural pond slag water content reaches 85%.Therefore, have the moisture in the big content of starting materials to become the usefulness that free-water is divided into natural pond liquid confession spray, unnecessary again natural pond liquid can be discharged from methane-generating pit and be used it for anything else in addition.And the fermentation raw material that adds is air-dry stalk (water content is below 15%), after fermenting raw materials becomes the natural pond slag is not have enough natural ponds liquid to produce, and will keep enough natural ponds liquid and spray this moment, also must add some moisture and replenish natural pond liquid.
Claims (1)
1, a kind of pure straw stackretting-free feeding methane fermentation method is characterized in that:
A, methane-generating pit start: zymotechnique routinely, with the preferred natural pond of bacterial classification slag to the stalk inoculation, feed intake, add water at 9: 1 by ratio of water to material, water material to be added accounts for and stops pan feeding when methane-generating pit always ferments volume 10%, the wait aerogenesis;
Behind b, the normal gas producing, stalk broken hand hay cutter or blue or green storage feeds intake by the multiple feed mode: methane-generating pit top evenly is provided with several opening for feeds, and only fed intake by an opening for feed every day, changed next opening for feed in second day to feed intake, with this by day feeding intake by a mouthful circulation;
C, spray neutralization: the methane-generating pit inner top is equipped with a plurality of shower nozzles, scum pump is set at the bottom of the pond, by scum pump the natural pond liquid of methane-generating pit bottom is transported to shower nozzle by liquid-transport pipe-line, spray, make raw material acidifying neutralization entering the fermentation raw material that floats over liquid top, natural pond in the methane-generating pit;
D, quantitative discharging: discharge a certain amount of useless natural pond slag that has fermented and finished by the inlet amount on the same day by the methane-generating pit bottom every day.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101575325A CN101591677B (en) | 2009-07-13 | 2009-07-13 | Pure straw stackretting-free feeding methane fermentation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101575325A CN101591677B (en) | 2009-07-13 | 2009-07-13 | Pure straw stackretting-free feeding methane fermentation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101591677A true CN101591677A (en) | 2009-12-02 |
| CN101591677B CN101591677B (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101575325A Expired - Fee Related CN101591677B (en) | 2009-07-13 | 2009-07-13 | Pure straw stackretting-free feeding methane fermentation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103265342A (en) * | 2013-05-20 | 2013-08-28 | 济南市花卉苗木开发中心 | Water saving system for landscaping waste treatment |
| CN107083402A (en) * | 2017-06-30 | 2017-08-22 | 合肥慧明瀚生态农业科技有限公司 | A kind of method of kitchen garbage without pile fermentation biogas |
| CN108998356A (en) * | 2018-09-28 | 2018-12-14 | 淮安市农业环境保护监测站 | The biogas recirculation utilizing works system of waste dish step fermentation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101372658B (en) * | 2008-08-16 | 2011-08-24 | 南阳市卧龙区农村能源环境保护管理站 | Equipment and method for directly depredating straw raw material in methane tank |
| CN101338325A (en) * | 2008-08-28 | 2009-01-07 | 河南富城生态能源科技有限公司 | Process for producing methane by dry-type fermentation of stalks |
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2009
- 2009-07-13 CN CN2009101575325A patent/CN101591677B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103265342A (en) * | 2013-05-20 | 2013-08-28 | 济南市花卉苗木开发中心 | Water saving system for landscaping waste treatment |
| CN107083402A (en) * | 2017-06-30 | 2017-08-22 | 合肥慧明瀚生态农业科技有限公司 | A kind of method of kitchen garbage without pile fermentation biogas |
| CN108998356A (en) * | 2018-09-28 | 2018-12-14 | 淮安市农业环境保护监测站 | The biogas recirculation utilizing works system of waste dish step fermentation |
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| Publication number | Publication date |
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| CN101591677B (en) | 2011-11-09 |
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Granted publication date: 20111109 |