CN101892268A - System for promoting fermentation of biogas from lignocellulose materials by utilizing microalgae - Google Patents
System for promoting fermentation of biogas from lignocellulose materials by utilizing microalgae Download PDFInfo
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- CN101892268A CN101892268A CN2010102155066A CN201010215506A CN101892268A CN 101892268 A CN101892268 A CN 101892268A CN 2010102155066 A CN2010102155066 A CN 2010102155066A CN 201010215506 A CN201010215506 A CN 201010215506A CN 101892268 A CN101892268 A CN 101892268A
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- fermentation
- biogas
- little algae
- lignocellulose materials
- microalgae
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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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention belongs to the field of bioenergy development and utilization and environmental protection and specifically relates to a system for promoting fermentation of biogas from lignocellulose materials by utilizing microalgae. The system comprises a raw material pretreatment device, a regulating reservoir, an anaerobic reactor, solid/liquid separation equipment, a biogas purification and separation device and a microalgae culture facility. The invention is characterized in that C/N of the fermentation liquor is regulated by culturing the microalgae and carrying out mixed anaerobic fermentation on the microalgae and the lignocellulose materials to make up the restriction of insufficient content of the lignocellulose material N to biogas generation through anaerobic fermentation, meanwhile, the microalgae participate in improving the energy yield of the whole fermentation system, the biogas generated through fermentation is purified and separated to separate CO2 from CH4, the separated CO2 is pumped into the microalgae culture facility to be used for enhancing the photosynthesis of the microalgae and the CH4 is directly used as energy or chemical raw material. The system solves the problem of insufficient nitrogen sources in most lignocellulose materials for anaerobic fermentation.
Description
Technical field
The invention belongs to bioenergy development and use and field of environment protection, be specifically related to a kind of system that utilizes little algae to promote fermentation of biogas from lignocellulose materials.
Background technology
Under the heavy demand of development low-carbon economy promoted, bioenergy had been subjected to unprecedented attention.The exploitation biofuel has become an important trend of world energy sources development in order to substitute fossil oil.For this reason, countries in the world are formulated the development that strategic planning promotes bioenergy one after another, the U.S. has proposed " 30-30 plan ", be 30% will substituting of the year two thousand thirty U.S.'s transport fuel with biofuel, Europe has proposed " 20-20 plan ", be the year two thousand twenty renewable energy source will account for whole European Union energy-output ratio 20%, wherein the biofuel ratio that accounts for transport fuel will reach more than 10%.In the bioenergy development program that European and American countries is formulated, the s-generation biofuel that all will be raw material with the lignocellulose is as the emphasis of research and development.
Lignocellulosic material is meant the class raw material that main component is made up of Mierocrystalline cellulose, hemicellulose and xylogen etc.,, be biomass resource the abundantest on the earth mainly from woody section plant (as various timber) and grass (as various crop materials).Utilize lignocellulosic material such as stalk to produce the important directions that biogas is the biofuel development.But because most lignocellulosic materials belong to rich carbon class raw material, nitrogen element content is low, 20～30: 1 the scope that its C/N is suitable far above the anaerobically fermenting microorganism, and therefore, this becomes a principal element that influences this type of raw material anaerobe conversion.
At the equilibrium problem of nutritive elements such as C and N, the external main method that adopts mixed fermentation, the ight soil and the stalk that are about to be rich in the N element carry out the nutritive equilibrium that anaerobic fermentation raw material is regulated in mixed fermentation.Though the C/N that utilizes ight soil to regulate fermentation raw material as mixing raw material is a kind of very economical and high-efficiency method, but this method is used the problem that mainly faces the raw material supply restriction at home, that is to say can be for the ight soil raw material that utilizes around the lignocellulose biogas fermentation engineering such as stalk under a lot of situations, and then there is not the problem of this respect substantially in the management style of external farmization.Under the situation that can supply to utilize, in order to regulate the nutritive equilibrium of fermented liquid, can only adopt the interpolation chemical agent, as NH at rich N class raw materials such as not having ight soil
4HCO
3Come the N element of afterfermentation raw material, and the use of chemical agent has improved the running cost of biogas engineering, has reduced its economic benefit.
Little algae is a class photosynthetic autotrophs unicellular organism, have aboundresources, of a great variety, photosynthetic efficiency is high, the characteristics of fast growth and body eutrophication compositions such as a large amount of absorption of N and P, therefore just is applied to the purifying treatment of sewage from the seventies in last century.The little algae that calculates according to Ge Luobeilaer is similar to molecular formula CO
0.48H
1.83N
0.11P
0.01As can be known, the C/N of little algae ratio is about 10: 1, belongs to a kind of rich N class raw material, in this respect, has certain similarity with ight soil class raw material, and the mixed fermentation raw material that can be used as lignocellulose is used.
Summary of the invention
The objective of the invention is to make up a CO who utilizes anaerobic fermented liquid and biogas to purify and produce
2Cultivate little algae Deng the product of anaerobic fermentation system self, and utilize little algae and lignocellulosic material mixed fermentation to regulate fermentation raw material C/N, improve lignocellulosic material anaerobically fermenting efficient, and then promote the marsh gas fermentation system of the overall output capacity of the energy.
Purpose of the present invention can reach by following measure:
A system that utilizes little algae to promote lignocellulosic material anaerobically fermentings such as stalk.The slag liquid mixture that produces behind the anaerobically fermenting is carried out solid-liquid separation, separate the natural pond liquid that produces and be used to cultivate little algae, enter into anaerobic reactor after growth has the natural pond liquid of little algae to be back to equalizing tank and lignocellulosic material mixes and produce biogas, the biogas that produces carries out purification processes, the CO that produces in the treating processes
2Being discharged into little algae cultivates in the facility in order to promote the photosynthesis of little algae, the output of raising biomass.Introducing by little algae, not only obtained to regulate the N source of lignocellulosic material C/N, and make this system possess certain fermentation raw material confession function, thus make this anaerobic fermentation system possess self-control C/N ability, and the characteristic that improves anaerobically fermenting effect and increase energy output.
Wherein lignocellulosic material is selected from one or more in maize straw, wheat stalk, straw, sorghum stalk, peanut seedling, grass and the bamboo product processing waste; Pretreatment process is preferentially selected for use and is rubbed cutting method; Anaerobic reactor is preferentially selected full mixed anaerobic reaction device (CSTR), upflow sludge bed reactor (USR) and high density plug flow reactor (HCPF) for use; Little algae is cultivated and preferentially selects the cultivation facility of sealing for use.
The present invention at first cuts lignocellulose or rub and cuts the raw material section that is processed into 2～3cm, if water ratio at the wet feed material more than 30%, cuts or rubs and carries out ensiling after cutting and deposit.Being added to equalizing tank through pretreated raw material mixes with little algae, lignocellulosic material is regulated than=15～25: 1 by C/N with the blending ratio of little algae, mixed raw materials is carried out acidification in equalizing tank, regulate its temperature simultaneously at 35～40 ℃, volatility of raw material solid (VS) concentration is 6～14%, and acidificatoin time can be controlled at 1～3d according to the difference of lignocellulosic material.The mixed fermentation raw material adopts intermittent feeding manner to add anaerobic reactor to after overregulating processing, charging every day 3～11 times, and the residence time of raw material in reactor is controlled to be 10～20d.The biogas that anaerobically fermenting produces carries out the desulfurization processing and removes H
2S adopts pressure swing adsorption process, WATER-WASHING METHOD or low temperature processing with CO then
2And CH
4Separately, handle CH in the biogas of back
4Content＞95%, CO
2＜5%, isolated CO
2Fill in little algae cultivation facility and be used to improve the output of little algae, CH as gas fertilizer
4Be used for generating, central gas supply or further be processed into compressed natural gas.The fermentation resistates that produces after the fermenting raw materials carries out solid-liquid separation to be handled, and separates the natural pond slag that obtains and directly is used as fertilizer or further is processed into organic commercial fertilizer, and natural pond liquid then is used as the nutrient solution of little algae.
Lignocellulose methane fermentation system involved in the present invention has the characteristics of following several respects:
1. the present invention has carried out organic combination with lignocellulosic material anaerobically fermenting and the cultivation of little algae, make and formed the positive feedback mechanism of mutually promoting between the two, N contains the quantity not sufficient problem simultaneously at solution lignocellulosic material anaerobically fermenting, also increase the total amount of fermentation system biomass, thereby improved overall system efficiency and energy output capacity.
2. be incorporated into the fermentation of biogas from lignocellulose materials system by little algae is cultivated, make system possess the function of the rich N raw material of self-production, solved the dependence problem of fermentation of biogas from lignocellulose materials external source N.
3. the CO that produces of anaerobic fermentation system
2For the growth of little algae provides gas fertilizer, promoted growth and the breeding of little algae, make system self possess conversion solar can and further be converted into biogas by the anaerobically fermenting of little algae ability, improved the energy output of total system.
4. the CH that produces of anaerobic fermentation system
4Can be used as and satisfy the required heat of little algae cultivation in winter and the fuel of light.
Description of drawings
Fig. 1 is that little algae of the present invention promotes the system of fermentation of biogas from lignocellulose materials system to form and fundamental diagram.
Embodiment
Below detailed explanation only be to set forth universal principle of the present invention, and nonrestrictive, can reasonably adjust and revise according to the different properties of fermentation raw material and the particular cases such as weather of technology application region in the actual application.
Embodiment
The sapphire rice stalk that to gather in the crops from the field be rubbed to cut and be processed into the raw material section that length is 2～3cm, carry out ensiling then and handle.The maize straw of handling through ensiling adds in the equalizing tank, mixes with algae water mixture from the Nannochloropsis oceanica cultivation pool, and the proportioning of cornstalk, Nannochloropsis oceanica and water is pressed C/N=25: 1, and VS%=10% allocates.Behind the acidification 2d, beginning is to the CSTR reactor feed in equalizing tank for maize straw and Nannochloropsis oceanica, and the intermittent feeding mode is taked in charging, charging every day 3～5 times, and inlet amount is pressed volumetric loading 4～5kgVS/ (m of reactor
3D) regulate and control, the controlling reactor leavening temperature is 38 ℃, and the CSTR agitator is opened 6～8 times every day, and each churning time is 15～20min.The biogas that fermentation produces adopts the dry type desulfurizing method to remove H
2S utilizes pressure swing adsorption technique with CO then
2And CH
4Separate isolated CO
2Blast from Nannochloropsis oceanica pond bottom, play the effect of stirring,, in the Nannochloropsis oceanica pond, replenish CO to prevent the sinking of little algae by the come-up of bubble
2CO in the time control pond
2Concentration is 2%, controls simultaneously that temperature is 20 ℃ in the pond.The slag liquid mixture that anaerobic reactor is discharged adopts spiral separator to carry out solid-liquid separation, and isolated natural pond slag is directly sold as fertilizer, and natural pond liquid then is pumped into little algae cultivation pool as the nutrient solution of Nannochloropsis oceanica.Natural pond liquid stopped in cultivation pool 2～3 days, was pumped into equalizing tank with the Nannochloropsis oceanica of cultivating then.This system has solved the insufficient problem of fermentation of biogas from lignocellulose materials N element by the combination of little algae cultivation with fermentation of biogas from lignocellulose materials, simultaneously by the introducing of micro algae biomass, has improved the energy output capacity of total system.
Claims (9)
1. system that utilizes little algae to promote fermentation of biogas from lignocellulose materials, it is characterized in that utilizing natural pond liquid to cultivate little algae and make it participate in the anaerobic fermentation process of lignocellulosic material, thereby regulate the C/N of fermentation raw material, contain the restraining effect of quantity not sufficient to remedy lignocellulosic material N to the aerogenesis effect, improve the energy output of whole fermentation system simultaneously by the participation of little algae, the biogas that fermentation produces by purification separation with CO
2With CH
4Separately, isolated CO
2Feed little algae and cultivate the interior gas fertilizer that is used as of facility to strengthen the photosynthesis of little algae, CH
4As the energy or industrial chemicals.
2. fermentation of biogas from lignocellulose materials according to claim 1 system is characterized in that described lignocellulosic material is selected from one or more in maize straw, wheat stalk, straw, sorghum stalk, peanut seedling, grass, the bamboo product processing waste.
3. fermentation of biogas from lignocellulose materials according to claim 1 system is characterized in that described anaerobically fermenting adopts a kind of in wet type fermentation or wet type and the dry type combined ferment.
4. fermentation of biogas from lignocellulose materials according to claim 1 system is characterized in that described marsh gas purifying separation method adopts one or both in pressure swing adsorption process, WATER-WASHING METHOD, low temperature processing, the membrane separation process.
5. fermentation of biogas from lignocellulose materials according to claim 1 system, what it is characterized in that described micro algae culturing device cultivates is the little algae of single kind, or multiple little algae, perhaps phycomycete mixture.
6. fermentation of biogas from lignocellulose materials according to claim 1 system is characterized in that described little algae planting unit combustion parts in winter methane is used to little algae to heat and adds lustre to.
7. fermentation of biogas from lignocellulose materials according to claim 1 system is characterized in that described anaerobic fermented liquid C/N ratio is 20～30: 1.
8. fermentation of biogas from lignocellulose materials according to claim 1 system is characterized in that little algae participates in the lignocellulosic material anaerobic fermentation process with hygrometric state.
9. fermentation of biogas from lignocellulose materials according to claim 1 system is characterized in that the residence time of fermentation raw material in anaerobic reactor is 15～35 days.
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| CN2010102155066A CN101892268A (en) | 2010-06-22 | 2010-06-22 | System for promoting fermentation of biogas from lignocellulose materials by utilizing microalgae |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701801A (en) * | 2012-05-16 | 2012-10-03 | 上海交通大学 | Method for producing biogas energy while preparing organic fertilizer or compound fertilizer by using inorganic fertilizer |
| CN104195182A (en) * | 2014-08-04 | 2014-12-10 | 中国科学院广州能源研究所 | Ensiling method of herbal energy plants for preparing biogas by virtue of anaerobic fermentation |
| WO2015161577A1 (en) * | 2014-04-25 | 2015-10-29 | 厦门大学 | Membrane photobioreactor for treating nitrogen and phosphorus out of limits in biogas slurry and treating method therefor |
| CN105110580A (en) * | 2015-09-29 | 2015-12-02 | 武汉理工大学 | Sewage treatment process and sewage treatment system for sewage treatment process |
| CN105175045A (en) * | 2015-09-02 | 2015-12-23 | 东北农业大学 | Microalgae culture and wood fiber waste fermentation coupling system |
| CN106105630A (en) * | 2016-06-23 | 2016-11-16 | 聊城华塑工业有限公司 | A kind of realize the method that useless biomass carbon converges in Greenhouse |
| CN107142197A (en) * | 2017-06-23 | 2017-09-08 | 四川省天惠能源科技有限公司 | A kind of biogas microalgae joint ecological treatment system and its application |
| CN111687182A (en) * | 2020-06-22 | 2020-09-22 | 北海市传创环保科技有限公司 | Carbon dioxide zero-emission type system for energy utilization of organic waste |
| CN113072177A (en) * | 2021-03-10 | 2021-07-06 | 南京理工大学 | Device and method for synchronously treating sludge digestive fluid and biogas by using in-situ algae |
| CN113800722A (en) * | 2021-10-09 | 2021-12-17 | 沈阳航空航天大学 | Method for co-producing methane-bio-oil by coupling domestic sewage anaerobic digestion with microalgae culture |
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Patent Citations (3)
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| CN1970776A (en) * | 2006-11-29 | 2007-05-30 | 江苏省农业科学院 | Comprehensive fermentation method for alga marsh gas and products therefrom |
| CN101230325A (en) * | 2008-02-04 | 2008-07-30 | 冯义华 | Method for cultivating photosynthetic microbe by using CO2 in marsh gas as carbon source |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701801A (en) * | 2012-05-16 | 2012-10-03 | 上海交通大学 | Method for producing biogas energy while preparing organic fertilizer or compound fertilizer by using inorganic fertilizer |
| CN102701801B (en) * | 2012-05-16 | 2014-02-19 | 上海交通大学 | Method for producing biogas energy while preparing organic fertilizer or compound fertilizer by using inorganic fertilizer |
| US10533148B2 (en) | 2014-04-25 | 2020-01-14 | Xiamen University | Membrane photobioreactor for treating nitrogen and phosphorus that are out of limits in biogas slurry and treating method thereof |
| WO2015161577A1 (en) * | 2014-04-25 | 2015-10-29 | 厦门大学 | Membrane photobioreactor for treating nitrogen and phosphorus out of limits in biogas slurry and treating method therefor |
| CN104195182B (en) * | 2014-08-04 | 2017-07-04 | 中国科学院广州能源研究所 | A kind of anaerobic fermentation prepares the Silaging method of the draft energy-source plant of biological flue gas |
| CN104195182A (en) * | 2014-08-04 | 2014-12-10 | 中国科学院广州能源研究所 | Ensiling method of herbal energy plants for preparing biogas by virtue of anaerobic fermentation |
| CN105175045A (en) * | 2015-09-02 | 2015-12-23 | 东北农业大学 | Microalgae culture and wood fiber waste fermentation coupling system |
| CN105110580A (en) * | 2015-09-29 | 2015-12-02 | 武汉理工大学 | Sewage treatment process and sewage treatment system for sewage treatment process |
| CN106105630A (en) * | 2016-06-23 | 2016-11-16 | 聊城华塑工业有限公司 | A kind of realize the method that useless biomass carbon converges in Greenhouse |
| CN107142197A (en) * | 2017-06-23 | 2017-09-08 | 四川省天惠能源科技有限公司 | A kind of biogas microalgae joint ecological treatment system and its application |
| CN111687182A (en) * | 2020-06-22 | 2020-09-22 | 北海市传创环保科技有限公司 | Carbon dioxide zero-emission type system for energy utilization of organic waste |
| CN113072177A (en) * | 2021-03-10 | 2021-07-06 | 南京理工大学 | Device and method for synchronously treating sludge digestive fluid and biogas by using in-situ algae |
| CN113072177B (en) * | 2021-03-10 | 2022-12-09 | 南京理工大学 | Device and method for synchronously treating sludge digestive fluid and biogas by using in-situ algae |
| CN113800722A (en) * | 2021-10-09 | 2021-12-17 | 沈阳航空航天大学 | Method for co-producing methane-bio-oil by coupling domestic sewage anaerobic digestion with microalgae culture |
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Application publication date: 20101124 |