CN103789351B - A kind of method taking molasses as substrate and produce biological flue gas - Google Patents
A kind of method taking molasses as substrate and produce biological flue gas Download PDFInfo
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- CN103789351B CN103789351B CN201410016962.6A CN201410016962A CN103789351B CN 103789351 B CN103789351 B CN 103789351B CN 201410016962 A CN201410016962 A CN 201410016962A CN 103789351 B CN103789351 B CN 103789351B
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/59—Biological synthesis; Biological purification
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Abstract
The invention discloses a kind of method taking molasses as substrate and produce biological flue gas, turn waste into wealth, its fermentation-scale can adjust according to actual needs, and product biogas efficiency is high, fermenting process is not easy acidifying, and the collection of raw material and transport do not exist the problem of the semi-solid raw material of solid yet; Compared with the technique being substrate with utilizing the waste water of molasses fermented ethanol, the molasses substrate that the present invention adopts is not only containing a large amount of fermentable sugar, also containing in a large number can fermented ingredient, organic composition in efficiency utilization molasses directly carries out biogas fermentation, therefore the efficiency of biogas fermentation and better effects if, and adopt technique and equipment fairly simple, avoid the hydrolytic process of lignocellulosic material, the present invention makes biogas fermentation technology be popularized in molasses abundance area, greatly accelerates the development of China and even world's renewable energy source.
Description
Technical field:
The present invention relates to a kind of method of producing biological flue gas, be specifically related to a kind of method taking molasses as substrate and produce biological flue gas.
Background technology:
Biological flue gas is commonly called as biogas, is the product of microbial population under anaerobic cooperative fermentation degradable organic waste, the atrophy of traditional energy supply and increase renewable energy source demand of share in energy expenditure and make the importance of biogas more and more outstanding.
Molasses be a kind of thickness, chocolate, in semifluid object, it is the byproduct of sugar industry, form because of the difference of sugaring raw material, processing conditions variant, wherein main containing a large amount of fermentable sugars (mainly sucrose), thus molasses are expected the desirable substrate becoming biogas fermentation.
At present, biogas fermentation mode major part general is both at home and abroad solid or semi-solid charging, namely the semi-solid raw material (agricultural crop straw or excrement of animals etc.) of solid is directly piled and is embedded in fermentor tank or reactor, makes it in fermentor tank or reactor, carry out solid or semisolid fermentation by interpolation bacterial classification and other batching (as nitrogenous source, phosphorus source etc.).The maximum shortcoming of of this traditional biogas fermentation method is that the cycle of solid or semisolid fermentation is longer, mass-and heat-transfer inefficiency, biogas yield are low, industrial scale can not excessive, the easy acidifying of fermenting process cause biogas fermentation unsuccessfully.Therefore, biogas fermentation technology can only be promoted usually in rural area or samll cities and towns.Meanwhile, the collection of the semi-solid raw material of solid and transportation cost also limit the further genralrlization of biogas fermentation technology.Therefore, if a kind of desirable Liquid Substrate can be obtained for Biogas Fermentation Progress biological flue gas, then the development of biological flue gas industry can greatly be promoted.
At present, the patent No. be 200710066066 and 201110027065 patent discloses use molasses fermented prepare ethanol after waste liquid produce the method for biological flue gas (biogas) for raw material, be that first starting raw material has carried out zymamsis with molasses, its process relates to the pre-treatment to molasses, most of fermentable sugar in molasses can be caused to be utilized, in a large number can fermented ingredient (as solubility colloid, albumen etc.) inevitably lose in alcoholic fermentation process, and first use molasses to carry out zymamsis to recycle its fermentation waste water and carry out biogas fermentation, owing to containing the fermentation byproducts such as a large amount of organic acids in the waste water of molasses fermented ethanol, the suppression to biogas fermentation can be caused, thus affect efficiency and the effect of follow-up biogas fermentation, moreover, marsh gas fermentation process more complicated disclosed in above-mentioned document, its preparation needs through multiple experimental installation and step, be unfavorable for that Follow-up Industryization is produced.Therefore, if can develop one with liquid molasses for substrate, the simple technological line of operational path carries out biogas fermentation, is expected the development greatly promoting China's biological flue gas industry.
Molasses are directly utilized to carry out biogas fermentation for raw material there are no bibliographical information both at home and abroad at present.
Summary of the invention:
The object of this invention is to provide a kind of method taking molasses as substrate and produce biological flue gas, fermentation period is short, product biogas efficiency is high, industrial scale can control, fermenting process is not easy acidifying, and the collection of raw material and transport do not exist the problem of the semi-solid raw material of solid yet.
The present invention is achieved by the following technical programs:
Take molasses as the method that substrate produces biological flue gas, comprise the following steps:
A, in molasses, add alkaline matter regulate pH to be 5.5 ~ 10.0, filter, obtain raw material clear liquid after pre-treatment;
Thin up in raw material clear liquid after b, the pre-treatment that obtains in step a, after making pre-treatment, the COD of raw material clear liquid reaches 2000 ~ 25000mg/L, adding phosphorus source nutritive substance makes C/P mass ratio be 100-300:1, adds nitrogenous source nutritive substance and makes C/N mass ratio be 10-80:1, obtain fermentation raw material;
C, first add in anaerobically fermenting device account for reactor volume 10% ~ 80% containing the material of anaerobically fermenting bacterial strain, then fermentation raw material is delivered to continuously anaerobic reactor to continuously ferment, fermentation raw material residence time in anaerobic reactor is 2 ~ 20h, leavening temperature is between 15 ~ 50 DEG C, and biological flue gas (biogas) is discharged from fermentation reactor top.
Described molasses are sugar industry byproduct, effective constituent is that (massfraction of fermentable sugar is more than or equal to 24% to fermentable sugar, described fermentable sugar mainly comprises sucrose), mineral substance (the total mass mark of mineral substance is 8% ~ 10%, comprises calcium, potassium, sodium, iron, magnesium, copper etc.) and crude protein (massfraction is 3.0-6.0%).
Described mineral substance is for providing inorganic salt in fermenting process, and as the cofactor of biogas fermentation, described crude protein provides nitrogenous source for fermenting process.
Described molasses include, but are not limited to cane molasses and beet sirup.
Described cane molasses is sugar industry byproduct, main component is fermentable sugar (the wherein massfraction 24% ~ 36% of sucrose, the massfraction of other sugar (comprising glucose and fructose) is 12% ~ 24%) and containing crude protein (massfraction is 3 ~ 6%), (massfraction is 8 ~ 10% to mineral substance, comprise calcium, potassium, sodium, iron, magnesium, copper etc.), be generally the waste of sugar refinery.
In described beet sirup in fermentable sugar the massfraction of sucrose more than 47%, the solubility colloid, the massfraction that are 3% ~ 4% containing massfraction be in addition 3 ~ 6% crude protein, massfraction be the mineral substance of 8 ~ 10%, described mineral substance comprises calcium, potassium, sodium, iron, magnesium, copper etc.
Described alkaline matter include, but are not limited in lime, calcium carbonate, sodium hydroxide, potassium hydroxide, sodium carbonate, salt of wormwood etc. one or more.
Phosphorus source nutritive substance described in step b be selected from primary ammonium phosphate, Secondary ammonium phosphate, potassium primary phosphate, SODIUM PHOSPHATE, MONOBASIC, potassium hydrogen phosphate and sodium hydrogen phosphate one or more.
Nitrogenous source nutritive substance described in step b be selected from corn steep liquor, Semen Maydis powder, wheat bran, rice bran, yeast extract paste, peptone, fish meal, soybean cake powder, yeast powder, soya-bean cake, urea, ammonium sulfate, ammonium chloride, volatile salt, bicarbonate of ammonia one or more.
The material containing anaerobically fermenting bacterial strain described in step c is selected from anaerobic activated sludge or anaerobic grain sludge etc.
Anaerobically fermenting device described in step c is selected from anaerobic fermentation tank, anaerobic biofilter, upflow anaerobic sludge blanket reactor, expanded granular sludge bed reactor reactor or internal-circulation anaerobic reactor etc.
The invention has the beneficial effects as follows:
The substrate that the present invention is used as biogas fermentation with molasses carries out biogas fermentation, turn waste into wealth, its fermentation-scale can adjust according to actual needs, industrial scale can control, produce biogas efficiency high, fermenting process is not easy acidifying, and the collection of raw material and transport do not exist the problem of the semi-solid raw material of solid yet.Compared with the technique being substrate with utilizing the waste water of molasses fermented ethanol, the molasses substrate that the present invention adopts is not only containing a large amount of fermentable sugar, also containing in a large number can fermented ingredient, organic composition in efficiency utilization molasses directly carries out biogas fermentation, therefore the efficiency of biogas fermentation and better effects if, and adopt technique and equipment fairly simple, avoid the hydrolytic process of lignocellulosic material, the present invention makes biogas fermentation technology be popularized in molasses abundance area, greatly accelerates the development of China and even world's renewable energy source.
Embodiment:
Below further illustrate of the present invention, instead of limitation of the present invention.
Embodiment 1:
Cane molasses is obtained from sugar refinery; With lime, molasses pH is adjusted to 10.0 again, filters, after neutralization, obtain molasses filtrate.
Gained molasses filtrate is diluted with water to initial COD2000mg/L, adds potassium primary phosphate and regulates the molasses C/P mass ratio after dilution to be 200:1 respectively, adds yeast powder and regulates the molasses C/N mass ratio after dilution to be 10:1.
Anaerobic grain sludge is loaded anaerobic fermentation tank, and dress mud amount is 50% of reactor volume.
Utilize pump that the molasses diluent in phosphorous source is squeezed in anaerobic fermentation tank to continuously ferment, fermentation raw material residence time in anaerobic reactor is 6h, and leavening temperature is 35 DEG C, and biological flue gas (biogas) is discharged from fermentation reactor top.Producing biogas efficiency is 30%.
Embodiment 2:
Beet sirup is obtained from sugar refinery; With calcium carbonate, molasses pH is adjusted to 5.5 again, filters, after neutralization, obtain molasses filtrate.
Gained molasses filtrate is diluted with water to initial COD12000mg/L, adds primary ammonium phosphate and regulates the molasses C/P mass ratio after dilution to be 100:1 respectively, adds urea and regulates the molasses C/N mass ratio after dilution to be 80:1.
Anaerobic grain sludge is loaded upflow anaerobic sludge blanket reactor, and dress mud amount is 10% of reactor volume.
Utilize pump that molasses diluent is squeezed in upflow anaerobic sludge blanket reactor to continuously ferment, fermentation raw material residence time in anaerobic reactor is 2h, and leavening temperature is 15 DEG C, and biological flue gas (biogas) is discharged from fermentation reactor top.Producing biogas efficiency is 35%.
Embodiment 3:
Cane molasses is obtained from sugar refinery; With sodium carbonate, molasses pH is adjusted to 7.5 again, filters, after neutralization, obtain molasses filtrate.
Gained molasses filtrate is diluted with water to initial COD25000mg/L, adds sodium hydrogen phosphate and regulates the molasses C/P mass ratio after dilution to be 300:1 respectively, adds volatile salt and regulates the molasses C/N mass ratio after dilution to be 60:1.
Anaerobic activated sludge is loaded expanded granular sludge bed reactor reactor, and dress mud amount is 80% of reactor volume.
Utilize pump that molasses diluent is squeezed in expanded granular sludge bed reactor reactor to continuously ferment, fermentation raw material residence time in anaerobic reactor is 15h, and leavening temperature is 50 DEG C, and biological flue gas (biogas) is discharged from fermentation reactor top.Producing biogas efficiency is 40%.
Embodiment 4:
Cane molasses is obtained from fermentation plant; With sodium hydroxide, cane molasses pH is adjusted to 8.0 again, filters, after neutralization, obtain molasses filtrate.
Gained molasses filtrate is diluted with water to initial COD20000mg/L, adds potassium hydrogen phosphate and regulates the waste water C/P mass ratio of the molasses fermented ethanol after dilution to be 250:1 respectively, adds ammonium sulfate and regulates the molasses C/N mass ratio after dilution to be 35:1.
Anaerobic activated sludge is loaded anaerobic biofilter, and dress mud amount is 80% of reactor volume.
Utilize pump that molasses diluent is squeezed in anaerobic biofilter to continuously ferment, fermentation raw material residence time in anaerobic reactor is 15h, and leavening temperature is 45 DEG C, and biological flue gas (biogas) is discharged from fermentation reactor top.Producing biogas efficiency is 32%.
Embodiment 5:
Beet sirup is obtained from fermentation plant; With potassium hydroxide, beet sirup pH is adjusted to 10.0 again, filters, after neutralization, obtain molasses filtrate.
Gained molasses filtrate is diluted with water to initial COD18000mg/L, adds Secondary ammonium phosphate and regulates the waste water C/P mass ratio of the molasses fermented acetone-butanol after dilution to be 220:1 respectively, adds peptone and regulates the molasses C/N mass ratio after dilution to be 25:1.
Anaerobic grain sludge is loaded internal-circulation anaerobic reactor, and dress mud amount is 80% of reactor volume.
Utilize pump that molasses diluent is squeezed in internal-circulation anaerobic reactor to continuously ferment, fermentation raw material residence time in anaerobic reactor is 20h, and leavening temperature is 50 DEG C, and biological flue gas (biogas) is discharged from fermentation reactor top.Producing biogas efficiency is 27%.
Claims (5)
1. be the method that substrate produces biogas with molasses, it is characterized in that, comprise the following steps:
A, in molasses, add alkaline matter regulate pH to be 5.5 ~ 10.0, filter, obtain raw material clear liquid after pre-treatment;
Thin up in raw material clear liquid after b, the pre-treatment that obtains in step a, after making pre-treatment, the COD of raw material clear liquid reaches 2000 ~ 25000mg/L, adding phosphorus source nutritive substance makes C/P mass ratio be 100-300:1, adds nitrogenous source nutritive substance and makes C/N mass ratio be 10-80:1, obtain fermentation raw material;
C, first add in anaerobically fermenting device account for anaerobically fermenting body amass 10% ~ 80% containing the material of anaerobically fermenting bacterial strain, then fermentation raw material is delivered to continuously anaerobically fermenting device to continuously ferment, fermentation raw material residence time in anaerobically fermenting device is 2 ~ 20h, leavening temperature is between 15 ~ 50 DEG C, and biogas is discharged from anaerobically fermenting device top.
2. the method taking molasses as substrate and produce biogas according to claim 1, it is characterized in that, described molasses are selected from cane molasses or beet sirup.
3. according to claim 1 and 2 is that substrate produces the method for biogas with molasses, it is characterized in that, described alkaline matter be selected from lime, calcium carbonate, sodium hydroxide, potassium hydroxide, sodium carbonate, salt of wormwood more than one.
4. the method taking molasses as substrate and produce biogas according to claim 1 and 2, is characterized in that, the material containing anaerobically fermenting bacterial strain described in step c is selected from anaerobic activated sludge or anaerobic grain sludge.
5. the method taking molasses as substrate and produce biogas according to claim 1 and 2, it is characterized in that, the anaerobically fermenting device described in step c is selected from anaerobic fermentation tank, anaerobic biofilter, upflow anaerobic sludge blanket reactor, expanded granular sludge bed reactor reactor or internal-circulation anaerobic reactor.
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| CN104232692A (en) * | 2014-08-22 | 2014-12-24 | 南京工业大学 | Pretreatment method of molasses and application of molasses obtained by pretreatment method |
| CN106399386A (en) * | 2016-12-02 | 2017-02-15 | 中科院广州能源所盱眙凹土研发中心 | Method for producing biological fuel gas by using fruit and vegetable garbage |
| CN106947786A (en) * | 2017-05-12 | 2017-07-14 | 中科院广州能源所盱眙凹土研发中心 | The method that rubbish from cooking prepares biogas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089579A (en) * | 1993-01-11 | 1994-07-20 | 农业部成都沼气科学研究所 | The iron processes pre-treatment of marsh gas fermentation of molasses containing waste water |
| CN101492222A (en) * | 2008-12-30 | 2009-07-29 | 广西贵糖（集团）股份有限公司 | Method for comprehensive treatment of wastewater and sludge gas utilization of cane sugar factory |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089579A (en) * | 1993-01-11 | 1994-07-20 | 农业部成都沼气科学研究所 | The iron processes pre-treatment of marsh gas fermentation of molasses containing waste water |
| CN101492222A (en) * | 2008-12-30 | 2009-07-29 | 广西贵糖（集团）股份有限公司 | Method for comprehensive treatment of wastewater and sludge gas utilization of cane sugar factory |
Non-Patent Citations (1)
| Title |
|---|
| 全糖蜜废糟生产沼气取得新进展;宋映雪;《中国沼气》;19911001;第9卷(第3期);第5行 * |
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