CN102732565A - Method of producing methane by utilizing straws and waste wine distillation liquor together - Google Patents
Method of producing methane by utilizing straws and waste wine distillation liquor together Download PDFInfo
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- CN102732565A CN102732565A CN2012102552553A CN201210255255A CN102732565A CN 102732565 A CN102732565 A CN 102732565A CN 2012102552553 A CN2012102552553 A CN 2012102552553A CN 201210255255 A CN201210255255 A CN 201210255255A CN 102732565 A CN102732565 A CN 102732565A
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- stalk
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- 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
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- Micro-Organisms Or Cultivation Processes Thereof (AREA)
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Abstract
The invention discloses a method of producing methane by utilizing straws and waste wine distillation liquor together. The method comprises the following steps: preprocessing straws, proportioning the preprocessed straws and the waste wine distillation liquor, preprocessing stack retting, transplanting the preprocessed stack retting, and fermenting the preprocessed stack retting in a pool. The method provided by the invention can be used for producing the methane by utilizing the crop straws and the waste wine distillation liquor of a winery at the same time, and no secondary pollution is generated in the process of producing methane.
Description
Technical field
The present invention relates to the method for a kind of stalk and wine slops co-production biogas, belong to organic waste utilization and production of renewable energy resources technical field.
Background technology
China is a large agricultural country, nearly 700,000,000 tons of annual stalk output.Along with improving constantly of China's living standards of the people, the agricultural crop straw quantity of using that acts as a fuel is fewer and feweri.Annual according to estimates about 400,000,000 tons residue stalk is piled everywhere and is abandoned and burn arbitrarily, a large amount of society, economy and ecological problems such as caused topsoil, soil mineralization, fire failure, block the traffic.The raw material of high carbon contents such as farm crop rich cellulose can provide carbon for biogas production.
Brewery's slops is a kind of waste water of high organic content, and its pH value is 3.0 ~ 3.5, COD
CrValue is 25000 ~ 40000mg/L, BOD
5Value is 25000 ~ 30000mg/L, considerably beyond the wastewater discharge standard of country's permission.Part producer directly discharges brewery's slops as refuse, and environment is caused severe contamination.Can satisfy the required nitrogen element of biogas production and contain high nitrogenous materials such as a large amount of carbohydrates, protein and amino in the slops, directly discharging is great waste.
In order to address the above problem, the technology and the technology of utilizing brewery's slops production biogas of crop straws for producing biogas appearred in the prior art utilizing.
Utilize the prior art of crop straws for producing biogas a lot; For example Chinese patent number " 200810141177.8 " discloses a kind of technology of utilizing stalk dry type fermentation and biogas production; Open day is on 01 07th, 2009, the steps include: one, with kibbler with crushed stalk to 2-8mm, two, crushed straw aggregate is delivered to pretreatment pool through transfer roller; And the hot water and the stover ferment agent that in pretreatment pool, add 40-53 ℃ carry out pre-treatment; The natural pond liquid that the crushed straw aggregate of pretreatment pool and anaeroic digestor reflux, by 2: 1 mixed, stirring back stalk feed liquid solid content was 20-35%; Three, carry stalk feed liquid ana in the anaeroic digestor top with sludge pump, leavening temperature is 40-53 ℃; Four, the biogas of fermentation generation, purifying through gas-liquid separation, purification is clean fuel.
In the technology of utilizing brewery's slops production biogas; Chinese patent number " 201010576401.3 " discloses the method that a kind of anaerobism water outlet recycling of water resource is produced alcohol; Open day is on 07 13rd, 2011; Comprise following steps: the alcohol distillation waste liquid gets into the anaerobism marsh-gas fermentation tank and carries out biogas fermentation, and the biogas of generation gets into cogeneration and generates electricity.The anaerobism water outlet is through atmospheric oxidation; Or the pure oxygen oxidation, or hydrogen peroxide oxidation, or oxide treatment such as ozone oxidation; Reuse is carried out zymamsis as the spice water again; Realize recycling of water resource, fermented liquid distillation back obtains finished product alcohol, and slops gets into the circulation of carrying out next batch in the anaerobism marsh-gas fermentation tank.
But do not utilize stalk and wine slops to produce the technology of biogas in the prior art simultaneously.Its essence of biogas fermentation is exactly the culturing process of mikrobe.In marsh gas fermentation processes, the degradable fermented raw material of various mikrobe actings in conjunction is translated into biogas, realizes microbial growth simultaneously.Therefore the microbial growth metabolic condition is just depended in the success or not of biogas fermentation, and the content ratio of carbon and nitrogen element then is the metabolic key factor of mikrobe normal growth in the fermentation raw material.Stalk is the raw material of high carbon content, utilizes stalk to carry out biogas fermentation separately and is easy to " acidifying " phenomenon occur, causes the fermentation failure; Brewery's slops is a kind of raw material of high nitrogen content, utilizes it to carry out biogas fermentation separately and can cause microbial growth inefficiency or growth-inhibiting because carbon-nitrogen ratio is lacked of proper care, thereby reduce fermentation efficiency or fermentation failure.
Summary of the invention
The objective of the invention is to overcome and utilize brewery's slops to produce biogas and the problems referred to above of utilizing crop straws for producing biogas to exist in the prior art, the method for a kind of stalk and wine slops co-production biogas is provided.The present invention utilizes agricultural crop straw and brewery's slops to produce biogas simultaneously, and does not have secondary pollution in the production biogas process.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:
The method of a kind of stalk and wine slops co-production biogas is characterized in that, comprises the steps: the stalk pre-treatment, the proportioning of pretreated stalk and wine slops, stack retting pre-treatment, inoculation and pit entry fermentation.
In the said stalk pre-treatment, the method that employing is pulverized or hand hay cutter is disconnected is carried out pretreatment operation to the air-dry stalk of TS content＞90%, and the stalk particle diameter after the pulverizing is greater than 5 orders, and the stalk that hand hay cutter is had no progeny is less than the 2cm/ section.
In the proportioning of said pretreated stalk and wine slops, with two kinds of raw material uniform mixing, and carbon nitrogen content mass ratio is 20 ~ 30:1 in the compound.
In the said stack retting pre-treatment, in compound, adding its water cut of water adjusting is 70 ~ 75%, and re-adjustment pH value to 7.0 is carried out stack retting at normal temperatures after mixing once more, and be 6-8 days summer stack retting time, and be 9-11 days winter in spring and autumn.
In the said inoculation step, the mixing raw material after the stack retting end is taken out, regulate pH value to 7.2 once more, add water and regulate its water cut to 80 ~ 85%, add the biogas fermentation inoculum and mix.
In the said pit entry fermentation step, the material of accomplishing inoculation is carried out the dry type fermentation and biogas production, leavening temperature is 25-35 ℃, and fermentation period is 55-65 days.
Said stalk is not for to produce the agricultural crop straw of inhibition to biogas fermentation.
Said stalk is paddy rice, wheat, corn, Chinese sorghum, rape, barley, cotton or soybean etc.
In the said stack retting preprocessing process, the hollow ground of the place of being selected for use for not seeping water and leaking.
Microbe population is greater than 1.0 * 10 in the said biogas fermentation inoculum
6Individual/gram, inoculum size is for mixing 25-35% of back quality of material.
Employing the invention has the advantages that:
One, the present invention includes following steps: stalk pre-treatment, the proportioning of pretreated stalk and wine slops, stack retting pre-treatment; Inoculation and pit entry fermentation, this method can utilize agricultural crop straw and brewery's slops to produce biogas simultaneously, according to two kinds of raw materials characteristic separately; Select suitable blend proportion to form the substrate of biogas fermentation; Solved the pollution problem of two kinds of raw materials, and do not had secondary pollution in the production process, the resistates after aerogenesis finishes can directly be used as fertilizer; Simple to operation, the mixture of air-dry stalk and brewery's slops is per ton can produce biogas 250m
3About, have good production potential and application prospect.
Two, among the present invention; In the said stalk pre-treatment, adopt pulverizing or the disconnected method of hand hay cutter that air-dry stalk is carried out pretreatment operation, the stalk particle diameter after the pulverizing is greater than 5 orders; The stalk that hand hay cutter is had no progeny is less than the 2cm/ section; Through the operation of this step, can improve the degradation rate of stalk, dwindle itself and brewery's slops and utilize the difference before the speed.
Three, among the present invention; In the proportioning of said pretreated stalk and wine slops; With two kinds of raw material uniform mixing; And carbon nitrogen content mass ratio is 20 ~ 30:1 in the compound, is that the microbial growth metabolism provides suitable trophic factor to guarantee it, the higher or low excessively failure that all can cause fermentation of C/N ratio.
Four, among the present invention, in the said stack retting pre-treatment, in compound, adding its water cut of water adjusting is 70 ~ 75%; Re-adjustment pH value to 7.0 is carried out stack retting at normal temperatures after mixing once more, be 6-8 days summer stack retting time; Be 9-11 days winter in spring and autumn, and when stack retting, regulating water cut is 70 ~ 75%, promptly can satisfy the growth needs of aerobic microbiological; Also can guarantee fully contacting of brewery's slops and stalk, reach stack retting effect preferably, regulating the pH value is 7.0; Can in brewery's slops in the part VFA; Give microorganism growth suitable growing environment, the stack retting time is according to the difference in season and difference, avoids the loss of nutritive element when can guarantee the effect of stack retting.
Five, among the present invention, in the said inoculation step, the mixing raw material after the stack retting end is taken out; Regulate pH value to 7.2 once more, add water and regulate its water cut to 80 ~ 85%, add the biogas fermentation inoculum and mix; Raw material after stack retting finishes has a large amount of volatile acid accumulation; Through the adjustment of pH value and water cut,, shorten the fermentation starting cycle for the mikrobe of anaerobically fermenting provides a normal growth metabolism environment.
Six, among the present invention, in the said pit entry fermentation step, the material of accomplishing inoculation is carried out the dry type fermentation and biogas production, leavening temperature is 25-35 ℃, and fermentation period is 55-65 days, utilizes the dry type fermentative processing simple to operate, can significantly reduce workload; Fermentation at normal temperatures can reduce self consuming energy of fermentation, practices thrift investment; 55 ~ 65 days fermentation period can make full use of raw material production biogas, and raw material can reach the effect of fully becoming thoroughly decomposed simultaneously, and the raw material of fermentation ends can directly be made fertilizer and also use in the field.
Seven, among the present invention, said stalk like paddy rice, wheat, corn, Chinese sorghum, rape, barley, cotton or soybean etc., can not cause the fermentation failure because of containing inhibitory substance for biogas fermentation is not produced the agricultural crop straw of inhibition.
Eight, among the present invention; In the said stack retting preprocessing process, the loss of slops in the stack retting process can be avoided in the hollow ground of the place of being selected for use for not seeping water and leaking; The proportioning of stalk and slops is not changed basically, and what guarantee fermentation normally carries out the biogas output with capacity.
Nine, among the present invention, microbe population is greater than 1.0 * 10 in the said biogas fermentation inoculum
6Individual/gram, inoculum size is for mixing 25-35% of back quality of material, can guarantee the normal startup of fermenting to reduce start time, improved the efficient of fermentation.
Embodiment
Embodiment 1
With the dried fermentor tank of 1L is fermenting container, is raw material with straw and distillery's slops, operates according to present method, specific as follows:
1, straw is air-dry, pulverizes with stalk crasher, and particle diameter is about 5 orders;
2, the carbon nitrogen content of test straw and brewery's slops, result such as following table:
| Project | Water cut (%) | Carbon content (%) | Nitrogen content (%) | C/N ratio |
| Straw | 5 | 42 | 0.63 | 66.7：1 |
| Slops | 99.5 | 3.3 | 0.7 | 4.7：1 |
According to the said determination value, calculate the straw powder respectively and brewery's slops consumption is 100g, 200ml, this moment, the raw material C/N ratio was about 23.3:1.
3, straw powder 100g, the slops 200ml of brewery got in title (amount), and other adds the flushing waste water 84ml of brewery, regulates pH value to 7.0 with lime powder, mixes.This moment, raw material TS content was 25%.With the stack retting in 35 ℃ of incubators of the raw material after mixing.
4, after 7 days the raw material of stack retting in (3) is taken out, add the flushing waste water 156ml of brewery again, regulate pH value to 7.2 once more with lime powder, adding 160g biogas fermentation inoculum mixes.The biogas fermentation inoculum can be the discharging of biogas fermentation composite fungus agent of the prior art or the normal dry fermentation methane engineering of moving.
5, with the dried fermentor tank of 1L of packing into of the fermentation raw material in (4), put into 35 ℃ of incubators and ferment.Fermentation period is 60 days, common property biogas 28L after the fermentation ends.
Embodiment 2
The method of a kind of stalk and wine slops co-production biogas comprises the steps: the stalk pre-treatment, the proportioning of pretreated stalk and wine slops, stack retting pre-treatment, inoculation and pit entry fermentation.
In the said stalk pre-treatment, the method that employing is pulverized or hand hay cutter is disconnected is carried out pretreatment operation to the air-dry stalk of TS content＞90%, and the stalk particle diameter after the pulverizing is greater than 5 orders, and the stalk that hand hay cutter is had no progeny is less than the 2cm/ section.
In the proportioning of said pretreated stalk and wine slops, with two kinds of raw material uniform mixing, and carbon nitrogen content mass ratio is 20:1 in the compound.
In the said stack retting pre-treatment, in compound, adding its water cut of water adjusting is 70%, and re-adjustment pH value to 7.0 is carried out stack retting at normal temperatures after mixing once more, and be 6 days summer stack retting time, and be 9 days winter in spring and autumn.
In the said inoculation step, the mixing raw material after the stack retting end is taken out, regulate pH value to 7.2 once more, add water and regulate its water cut to 80%, add the biogas fermentation inoculum and mix.
In the said pit entry fermentation step, the material of accomplishing inoculation is carried out the dry type fermentation and biogas production, leavening temperature is 25 ℃, and fermentation period is 55 days.
Said stalk is not for to produce the agricultural crop straw of inhibition to biogas fermentation, for example paddy rice, wheat, corn, Chinese sorghum, rape, barley, cotton or soybean etc.
Preferred implementation of the present invention is that in the said stack retting preprocessing process, the place of being selected for use is the hollow ground that does not seep water and leak.
Among the present invention, microbe population is greater than 1.0 * 10 in the said biogas fermentation inoculum
6Individual/gram, inoculum size is for mixing 25% of back quality of material.
Embodiment 3
Present embodiment and previous embodiment are basic identical, and the key distinction is following:
In the proportioning of said pretreated stalk and wine slops, with two kinds of raw material uniform mixing, and carbon nitrogen content mass ratio is 30:1 in the compound.
In the said stack retting pre-treatment, in compound, adding its water cut of water adjusting is 75%, and re-adjustment pH value to 7.0 is carried out stack retting at normal temperatures after mixing once more, and be 8 days summer stack retting time, and be 11 days winter in spring and autumn.
In the said inoculation step, the mixing raw material after the stack retting end is taken out, regulate pH value to 7.2 once more, add water and regulate its water cut to 85%, add the biogas fermentation inoculum and mix.
In the said pit entry fermentation step, the material of accomplishing inoculation is carried out the dry type fermentation and biogas production, leavening temperature is 35 ℃, and fermentation period is 65 days.
Microbe population is greater than 1.0 * 10 in the said biogas fermentation inoculum
6Individual/gram, inoculum size is for mixing 35% of back quality of material.
Embodiment 4
Present embodiment and previous embodiment are basic identical, and the key distinction is following:
In the proportioning of said pretreated stalk and wine slops, with two kinds of raw material uniform mixing, and carbon nitrogen content mass ratio is 25:1 in the compound.
In the said stack retting pre-treatment, in compound, adding its water cut of water adjusting is 72%, and re-adjustment pH value to 7.0 is carried out stack retting at normal temperatures after mixing once more, and be 7 days summer stack retting time, and be 10 days winter in spring and autumn.
In the said inoculation step, the mixing raw material after the stack retting end is taken out, regulate pH value to 7.2 once more, add water and regulate its water cut to 83%, add the biogas fermentation inoculum and mix.
In the said pit entry fermentation step, the material of accomplishing inoculation is carried out the dry type fermentation and biogas production, leavening temperature is 30 ℃, and fermentation period is 60 days.
Microbe population is greater than 1.0 * 10 in the said biogas fermentation inoculum
6Individual/gram, inoculum size is for mixing 30% of back quality of material.
The present invention is not the merging method of the existing independent fermentation process of stalk and brewery's slops fermentation process.Reason is one: the present invention is a fermentation raw material with stalk and brewery's slops; The C/N ratio of the slops of crop sequences stalk and different breweries is all inequality, should adjust the consumption of raw material when therefore utilizing the present invention to operate according to the actual carbon nitrogen content of raw material.Its two: the fermentation mode that the present invention selects is for doing fermentation, and the degraded of brewery's slops and stalk utilizes speed to have very big difference, utilizes the treatment process of stalk or brewery's slops to ferment, the failure of will inevitably fermenting.Therefore, existingly utilize technology that brewery's slops produces biogas and utilize the technology of crop straws for producing biogas can not directly combine production biogas.
Claims (10)
1. the method for stalk and wine slops co-production biogas is characterized in that, comprises the steps: the stalk pre-treatment, the proportioning of pretreated stalk and wine slops, stack retting pre-treatment, inoculation and pit entry fermentation.
2. the method for stalk according to claim 1 and wine slops co-production biogas; It is characterized in that: in the said stalk pre-treatment; The method that employing is pulverized or hand hay cutter is disconnected is carried out pretreatment operation to the air-dry stalk of TS content＞90%; Stalk particle diameter after the pulverizing is greater than 5 orders, and the stalk that hand hay cutter is had no progeny is less than the 2cm/ section.
3. the method for stalk according to claim 1 and 2 and wine slops co-production biogas; It is characterized in that: in the proportioning of said pretreated stalk and wine slops; With two kinds of raw material uniform mixing, and carbon nitrogen content mass ratio is 20 ~ 30:1 in the compound.
4. the method for stalk according to claim 3 and wine slops co-production biogas; It is characterized in that: in the said stack retting pre-treatment; In compound, adding its water cut of water adjusting is 70 ~ 75%, and re-adjustment pH value to 7.0 is carried out stack retting at normal temperatures after mixing once more; Be 6-8 days summer stack retting time, and be 9-11 days winter in spring and autumn.
5. according to the method for claim 1,2 or 4 described stalks and wine slops co-production biogas; It is characterized in that: in the said inoculation step; Mixing raw material after the stack retting end is taken out; Regulate pH value to 7.2 once more, add water and regulate its water cut to 80 ~ 85%, add the biogas fermentation inoculum and mix.
6. the method for stalk according to claim 5 and wine slops co-production biogas; It is characterized in that: in the said pit entry fermentation step; The material of accomplishing inoculation is carried out the dry type fermentation and biogas production, and leavening temperature is 25-35 ℃, and fermentation period is 55-65 days.
7. according to the method for claim 1,2,4 or 6 described stalks and wine slops co-production biogas, it is characterized in that: said stalk is not for to produce the agricultural crop straw of inhibition to biogas fermentation.
8. the method for stalk according to claim 7 and wine slops co-production biogas is characterized in that: said stalk is paddy rice, wheat, corn, Chinese sorghum, rape, barley, cotton or soybean.
9. the method for stalk according to claim 4 and wine slops co-production biogas is characterized in that: in the said stack retting preprocessing process, and the hollow ground of the place of being selected for use for not seeping water and leaking.
10. the method for stalk according to claim 5 and wine slops co-production biogas is characterized in that: microbe population is greater than 1.0 * 10 in the said biogas fermentation inoculum
6Individual/gram, inoculum size is for mixing 25-35% of back quality of material.
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| CN201210255255.3A CN102732565B (en) | 2012-07-23 | 2012-07-23 | Method of producing methane by utilizing straws and waste wine distillation liquor together |
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Citations (3)
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| CN101269904A (en) * | 2008-04-29 | 2008-09-24 | 安徽瑞福祥食品有限公司 | Method for wastewater treatment of fermentation groove liquid and uses thereof |
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| CN102121034A (en) * | 2010-12-07 | 2011-07-13 | 江南大学 | Method for producing alcohol by using anaerobic effluent in water recycling way |
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- 2012-07-23 CN CN201210255255.3A patent/CN102732565B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269904A (en) * | 2008-04-29 | 2008-09-24 | 安徽瑞福祥食品有限公司 | Method for wastewater treatment of fermentation groove liquid and uses thereof |
| CN101691537A (en) * | 2009-09-27 | 2010-04-07 | 上海大学 | Integrated processing method for byproducts in lignocellulose-refining fuel ethanol |
| CN102121034A (en) * | 2010-12-07 | 2011-07-13 | 江南大学 | Method for producing alcohol by using anaerobic effluent in water recycling way |
Non-Patent Citations (3)
| Title |
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| 张静等: "酒精沼气双发酵偶联中厌氧沼气的发酵行为", 《食品与生物技术学报》, vol. 29, no. 2, 31 March 2010 (2010-03-31), pages 276 - 281 * |
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