CN107090475A - A kind of technique of bionic anaerobic fermentation Biogas - Google Patents
A kind of technique of bionic anaerobic fermentation Biogas Download PDFInfo
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- CN107090475A CN107090475A CN201710277034.9A CN201710277034A CN107090475A CN 107090475 A CN107090475 A CN 107090475A CN 201710277034 A CN201710277034 A CN 201710277034A CN 107090475 A CN107090475 A CN 107090475A
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P5/00—Preparation of hydrocarbons or halogenated hydrocarbons
- C12P5/02—Preparation of hydrocarbons or halogenated hydrocarbons acyclic
- C12P5/023—Methane
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- C12P2203/00—Fermentation products obtained from optionally pretreated or hydrolyzed cellulosic or lignocellulosic material as the carbon source
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a kind of technique of bionic anaerobic fermentation Biogas, belong to the technical field of preparation of marsh-gas.The present invention comprises the following steps：1）Pretreatment of raw material, takes stalk, crushes；2）Material allocation, adds water, obtains feed liquid, the solid content of feed liquid is 5 8%, the temperature of feed liquid is 34 40 DEG C；3）Hydrolysis acidification, addition biogas slurry, intermittent aerating, at 34 40 DEG C, hydrolysis acidification, separation of solid and liquid obtains hydrolyzate；4）Anaerobic fermentation, takes hydrolyzate, at 34 40 DEG C, and anaerobic fermentation obtains biogas and biogas slurry；5）Continuous production.The present invention separates hydrolysis acidification with anaerobic fermentation, hydrolyzate only part after hydrolysis acidification is used for anaerobic fermentation, remaining hydrolyzate is used for the hydrolysis acidification of next group feed liquid together with the biogas slurry that anaerobic fermentation is produced, fully simulation ruminant tumor gastric digests mechanism, improve the efficiency of stalk hydrolysis acidification and anaerobic fermentation, cost of investment is reduced, economic benefit is added.
Description
Technical field
The invention belongs to the technical field of preparation of marsh-gas, a kind of work of bionic anaerobic fermentation Biogas is particularly related to
Skill.
Background technology
China is the most country of regenerative resource raw material quantum of output in the world, and annual agricultural solid residue yield is about
More than 40 hundred million tons, wherein, 3,000,000,000 tons of feces of livestock and poultry, more than 700,000,000 tons of agricultural crop straw；In agricultural crop straw, rice straw, corn stalk, wheat straw
Account for more than the 77% of total amount.At present, the utilization rate of China's stalk is very low, is used except direct returning to farmland, as fuel and less than 20%
Make outside feed, a large amount of residue stalks are arbitrarily abandoned field or directly burned, this can trigger many adverse consequences, such as resource wave
Take, soil fertility damage, environmental pollution, fire, traffic accident, ecological environment etc. around breathing problem and destruction.Anaerobic digestion
Technology is a kind of highly developed organic garbage treatment technology, can not only be converted crop material by using anaerobic digestion techniques
For efficiently, cleaning, high-grade novel energy --- biogas, while can also produce biogas residue and biogas slurry；The application of the technology can
Alleviate the nervous situation of China's conventional energy resource, can also solve the problem of outlet of agricultural crop straw, and reduce showing for environmental pollution
As.
Biogas is produced by anaerobic digestion techniques, it is necessary first to using stalk as raw material by the polyphosphazene polymer in biomass structure
Organic matter of the hydrate hydrolysis into small molecule.Because the lignin compared with difficult degradation is wrapped in cellulose and hemicellulose, in addition, fiber
The crystalline texture of element also has certain inhibitory action to biodegradation, so hydrolytic process is always lignocellulose biomass life
Produce the rate-limiting step of biogas.Suppression of the lignin to cellulose and hemicellulose degradation is mainly manifested in：It is fine in stalk cell wall
Dimension element, 3 kinds of polymer of hemicellulose and lignin are combined together to form " lignin and carbohydrate association（LCC）",
And lignin is covered in the surface of cellulose, form strong physical barriers, reduce cellulose using area, and then
Microorganism and enzyme are hindered close to the cellulose being easily biodegradable.Crystal structure of cellulose is degraded to lignocellulose biomass
Inhibitory action be mainly manifested in：Cellulosic molecule is in coherent condition, the extremely difficult dissolving of cellulose, and reactivity worth is poor, this
It is due to that the part of hydroxyl base of chain molecule in the whole hydroxyls and noncrystalline domain of chain molecule in cellulose crystallite area can be formed a lot
Hydrogen bond；Whole hydroxyls of cellulose crystallite area glucose molecule combine to form crystallization structure with the oxygen outside intramolecule or molecule
Make, reduce effective contact area of enzyme and cellulose, so as to inhibit the anaerobic digestion of lignocellulose biomass.The above two
Individual aspect causes stalk hydrolysis slowly, and hydrolysis degree is low, and then the follow-up acidifying of influence and methane phase process, shows as anaerobism and disappears
The restriction sex chromosome mosaicism such as change time length, digestibility are low, gas production is few, input-output efficiency is poor.
At present, to improve the efficiency that straw anaerobic digestion produces biogas, researchers attempt to improve stalk by pre-processing
Anaerobic biodegradability, it is intended to improve the Nomenclature Composition and Structure of Complexes of lignocellulosic, promote the progress of hydrolysis；Including
Physical method（Decompose, good fortune is penetrated, is pyrolyzed）, chemical method（Alkali process, acid treatment, oxidizer treatment）And biological method（Fungi,
Actinomyces or their ferment treatment）Deng, but these pretreatment modes due to having that efficiency is low, cost is high, with serious pollution ask
Topic and be difficult be promoted in straw methane engineering.
The content of the invention
The present invention provides the technique that a kind of bionic anaerobic ferments Biogas, solves stalk anaerobic fermentation in the prior art
The problem of there is low digestion time length, gas producing efficiency and high cost in the method for production biogas.
A kind of technique of bionic anaerobic fermentation Biogas of the present invention, it is mainly subject to reality by the following technical programs
Existing：Comprise the following steps：1）Pretreatment of raw material, takes raw material, is crushed；2）Material allocation, takes step 1）Gained raw material, adds
Add water, stir, obtain feed liquid, the solid content of feed liquid is 5-8%, and the temperature of feed liquid is 34-40 DEG C；3）Hydrolysis acidification, takes step 2）Institute
Feed liquid is obtained, biogas slurry, and intermittent aerating is added, aeration frequencies are 4-8min/2h, and aeration intensity is 9-12mLO2/ (gvs), in
At 34-40 DEG C, hydrolysis acidification obtains mixed material, and part mixes material is carried out into separation of solid and liquid, hydrolyzate is obtained；4）Anaerobic fermentation,
Take step 3）Gained hydrolyzate, at 34-40 DEG C, anaerobic fermentation obtains biogas and biogas slurry；5）Continuous production, collection step 4）Institute
Biogas is obtained, by step 4）Gained biogas slurry and step 3）Remaining mixed material is used for step 3）The hydrolysis acid of middle next batch feed liquid
Change, so circulation.
Cud efficient digestive system mechanism of the invention based on ruminant, two steps of design hydrolysis acidification and anaerobic fermentation
Suddenly the bionic anaerobic zymotechnique separated, the acid that separation of solid and liquid simulation rumen is carried out after hydrolysis acidification suppresses to release, and passes through natural pond
Salivation process is ruminated in liquid reuse simulation；Hydrolysis acidification step is aerated to realize its micro- oxygen environment, reaction temperature and knurl
Temperature is consistent in stomach；This ruminant tumor gastric digestion mechanism of imitating is sent out to improve the anaerobism of content of cellulose higher-class material
Ferment efficiency, can shorten hydraulic detention time, significantly improve the efficiency of stalk hydrolysis acidification and anaerobic fermentation, improve aerogenesis
Amount, reduces construction investment cost, adds the economic benefit of biogas engineering.Aeration intensity is with every gram（g）Dry（vs）Aeration
Oxygen equivalent（mLO2）Calculate, for example, directly use oxygen-containing 21% in air aeration, air, the amount of actual aeration quantity oxygen for needed for
Divided by 21%.
It is used as a kind of preferred embodiment, the step 3）In, addition and the step 4 of biogas slurry）Middle taken hydrolysis
The volume of liquid is equal.Biogas slurry after anaerobic fermentation, volatile fatty acid（VFA）Content is relatively low, is used through backflow spray
In the Hydrolysis Acidification of material, the secretion of ruminant saliva has been imitated；On the one hand, the mistake in Hydrolysis Acidification is alleviated
Acid environment, have adjusted the pH value of Hydrolysis Acidification, on the other hand, greatly reduces the discharge of follow-up biogas slurry, has saved biogas slurry
Processing cost.
It is used as a kind of preferred embodiment, the step 3）In, the volume for carrying out the mixed material of separation of solid and liquid does not surpass
Cross step 3）The 10% of mixed material cumulative volume.Hydrolyzate after hydrolysis acidification only takes sub-fraction to carry out anaerobic fermentation, remaining
Hydrolyzate continues on for the hydrolysis acidification of next group raw material；Separation of solid and liquid is carried out to the mixed material after hydrolysis acidification, imitated
Ruminant tumor gastric acidolysis removes mechanism, reduces influence of the acid accumulation to cellulose substances hydrolysis acidification efficiency；A small amount of is rich in
Volatile fatty acid（VFA）Hydrolyzate carry out anaerobic fermentation methane phase, can fully keep the stability of system.
It is used as a kind of preferred embodiment, the step 5）In, next batch feed liquid is hydrolyzed before acidifying, mixed
Isolated in compound material and next batch material liquid volume identical upper materials.The upper of same volume is isolated in mixed material
Layer material, promote other feed liquids is fully hydrolyzed acidifying.The step 3）In, pH value during hydrolysis acidification is 5.20-6.20.This
Kind of pH environment coincide with the pH environment in ruminant tumor gastric, anaerobic fermentation process is maintained between 6.90-7.20
Under neutrallty condition, the operation of this two step is respectively at acetogen and the optimal pH value range of methanogen, reduces acid accumulation pair
The influence of cellulose substances hydrolysis acidification efficiency.
It is used as a kind of preferred embodiment, the step 3）In, the time of hydrolysis acidification is 18-22 days, the step
4）In, the time of anaerobic fermentation is 1-3 days.By controlling the anaerobic fermentation time, the quality of methane phase gas can be preferably controlled,
The generation of excessive biogas slurry is avoided, the utilization rate of hydrolyzate is improved, so as to increase economic efficiency.
It is used as a kind of preferred embodiment, the step 3）In, the upper materials separated have for producing biology
Machine fertilizer.Upper materials in the mixed material produced after hydrolysis acidification contain substantial amounts of moisture and solid formation, with higher battalion
Value is supported, its value can not only be improved by being produced biological organic fertilizer, be increased economic efficiency, moreover, gained biology has
The fat power of machine is good, and value is high.
It is used as a kind of preferred embodiment, the step 1）In, raw material is stalk, and powder is carried out using mechanical crushing mode
Broken, the particle diameter after crushing is less than 2cm.Crushing is carried out by the way of mechanical crushing is more prone to crushing, convenient processing, crushes
Stalk afterwards is easier to make for hydrolyzing and is acidified, and improves hydrolysis and acidizing effect.
It is used as a kind of preferred embodiment, the step 2）Material allocation carried out in preparing pool, the preparing pool
It is connected with heat exchanger.By allotment of the preparing pool dedicated for raw material after crushing, so as to improve production efficiency.
It is used as a kind of preferred embodiment, the step 3）Hydrolysis acidification carried out in hydrolization and acidification tank, the water
Solution souring tank is connected by delivery pump with the preparing pool, and the inside of the hydrolization and acidification tank is provided with solid-liquid separator, the water
The top of solution souring tank is provided with the spray equipment for being used for spraying biogas slurry, and the hydrolization and acidification tank is also associated with aerator, described
Hydrolization and acidification tank is also connected with heat exchanger.Preparing pool, which is periodically realized, carries out raw material supply to hydrolization and acidification tank, and raw material is in hydrolysis acid
Change and pass through sufficient hydrolysis acidification in tank, then, a part of hydrolyzate is isolated by solid-liquid separator, this partial hydrolysis liquid is used
In anaerobic fermentation methane phase；Remaining hydrolyzate and biogas slurry are used for the hydrolysis acidification of next group feed liquid together, hydrolization and acidification tank
Setting makes hydrolysis acidification step operation easily, realizes the continuity of production.
It is used as a kind of preferred embodiment, the step 4）Anaerobic fermentation carried out in anaerobic fermentation tank, it is described to detest
Aerobe fermentation tank is connected by conveyance conduit with the bottom of the hydrolization and acidification tank, and the top of the anaerobic fermentation tank passes through biogas slurry pipe
Road is connected with the spray equipment of the hydrolization and acidification tank, and the storage for collecting biogas is also associated with the top of the anaerobic fermentation tank
Device of air, the anaerobic fermentation tank is also connected with heat exchanger.By the setting of anaerobic fermentation tank, hydrolyzate anaerobic fermentation is facilitated
Completion；Anaerobic fermentation tank and hydrolization and acidification tank organic linking, make biogas slurry reuse convenient, and hydrolyzate separation is simple, the company of realizing
Continuousization is operated.
The beneficial effects of the invention are as follows：The present invention separates material allocation, hydrolysis acidification and anaerobic fermentation step, and raw material is first
It is deployed into after feed liquid and acidifying is hydrolyzed again, the acid that separation of solid and liquid simulation rumen is carried out after hydrolysis acidification suppresses to release, and passes through
Salivation process is ruminated in biogas slurry reuse simulation；Hydrolyzate only part after hydrolysis acidification is used for anaerobic fermentation, remaining hydrolysis
Liquid is used for the hydrolysis acidification of next batch feed liquid together with the biogas slurry that anaerobic fermentation is produced, and whole technique is the mistake of a linkage
Journey, hydrolysis acidification step is aerated to realize its micro- oxygen environment, and reaction temperature is consistent with temperature in cud, fully simulated
Ruminant tumor gastric digests mechanism, the efficiency of stalk hydrolysis acidification and anaerobic fermentation is significantly improved, when shortening hydraulic retention
Between, construction investment cost is reduced, the economic benefit of biogas engineering is added.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the planar structure schematic diagram of one embodiment of the invention；
In figure：1- pulverizers；2- preparing pools；3- hydrolization and acidification tanks；4- anaerobic fermentation tanks；5- spray equipments；6- aerators；7-
Solid-liquid separator；8- heat exchangers；9- caissons；10- delivery pumps；11- organic fertilizer productions workshop.
Embodiment
Technical scheme is clearly and completely described below in conjunction with the specific embodiment of the present invention, shown
So, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
Refering to accompanying drawing 1, the equipment used in a kind of technique of bionic anaerobic fermentation Biogas of the invention have pulverizer 1,
Preparing pool 2, hydrolization and acidification tank 3, anaerobic fermentation tank 4；Raw material after the crushing of pulverizer 1 can be delivered to by feed device
Preparing pool 2, raw material is allocated in preparing pool 2, and preparing pool 2 is connected with heat exchanger 8；Allocate suitable feed liquid and pass through delivery pump
10 are delivered to hydrolization and acidification tank 3, and feed liquid is hydrolyzed acidifying in hydrolization and acidification tank 3, hydrolization and acidification tank 3 by delivery pump 10 with
Preparing pool 2 is connected, and feed liquid enters the inside of hydrolization and acidification tank 3 from the bottom of hydrolization and acidification tank 3, and the inside of hydrolization and acidification tank 3 is set
There is solid-liquid separator 7, solid-liquid separator 7 separates hydrolyzate, the top of hydrolization and acidification tank 3, which is provided with, to be used to discharge upper layer substance
The overfall of material, the top of hydrolization and acidification tank 3 is provided with the spray equipment 5 for being used for spraying biogas slurry, and hydrolization and acidification tank 3 is also associated with exposing
Device of air 6, hydrolization and acidification tank 3 is also connected with heat exchanger 8；Mixed material after the hydrolysis acidification of hydrolization and acidification tank 3 a, part is passed through
Internal solid-liquid separator 7 isolates hydrolyzate；Hydrolyzate after separation is directly entered anaerobic fermentation tank 4, and hydrolyzate is in anaerobism
Anaerobic fermentation is carried out in fermentation tank 4, anaerobic fermentation tank 4 is connected by conveyance conduit with the bottom of hydrolization and acidification tank 3, anaerobic fermentation
The top of tank 4 is connected by biogas slurry pipeline with the spray equipment 5 of hydrolization and acidification tank 3, and the top of anaerobic fermentation tank 4 is also associated with using
In the caisson 9 for collecting biogas, anaerobic fermentation tank 4 is also connected with heat exchanger 8；Delivery pump 10 enters next time to hydrolization and acidification tank 3
The upper materials of identical quantity in hydrolization and acidification tank 3 are made to be discharged from overfall during material, the feed liquid after charging continues in hydrolysis acidification
Acidifying is hydrolyzed in tank 3, hydrolyzate, so anaerobic fermentation, circulation is separated；The upper materials discharged from overfall have been delivered to
11 between machine fertilizer production vehicle, the production of biological organic fertilizer is carried out.
A kind of technique of bionic anaerobic fermentation Biogas of the present invention, comprises the following steps：1）Pretreatment of raw material, takes original
Material, is crushed in pulverizer 1；2）Material allocation, takes step 1）Gained raw material is put into preparing pool 2, adds water, is stirred,
Feed liquid is obtained, the solid content of feed liquid is 5-8%, makes the temperature of feed liquid be 34-40 DEG C by heat exchanger 8；3）Hydrolysis acidification, by step
2）Gained feed liquid is delivered in hydrolization and acidification tank 3 by delivery pump 10, is added by the spray equipment 5 at the top of hydrolization and acidification tank 3
Biogas slurry, and intermittent aerating is carried out using aerator 6, aeration frequencies are 4-8min/2h, and aeration intensity is 9-12mLO2/ (g·
Vs), the temperature of hydrolysis acidification is adjusted for 34-40 DEG C by the heat exchanger 8 being connected with hydrolization and acidification tank 3, acidifying is hydrolyzed, obtains
Mixed material, by part mixes material, is separated by solid-liquid separator 7, obtains hydrolyzate；4）Anaerobic fermentation, step 3）Institute
Obtain hydrolyzate and be fed directly to anaerobic fermentation tank 4, the temperature of anaerobic fermentation is controlled by the heat exchanger 8 being connected with anaerobic fermentation tank 4
Spend for 34-40 DEG C, carry out anaerobic fermentation, obtain biogas and biogas slurry；5）Continuous production, utilizes the collection step 4 of caisson 9）Gained
Biogas, by step 4）Gained biogas slurry is back to hydrolization and acidification tank 3 by spray equipment 5, re-starts pretreatment of raw material, raw material and adjusts
Match somebody with somebody, and deployed feed liquid is delivered to hydrolization and acidification tank 3 again, using the backflow of spray equipment 5 by last batch step 4）
Obtained biogas slurry and last batch step 3）Remaining mixed material is used for step 3 together）The hydrolysis acidification of middle batch feed liquid,
After hydrolysis acidification is finished, according to step 4）Method proceed anaerobic fermentation；So circulation, so as to realize continuous production.
Preferably, the step 3）In, addition and the step 4 of biogas slurry）The volume of middle taken hydrolyzate is equal.
Further, the step 4）In, the step 3）In, the volume for carrying out the mixed material of separation of solid and liquid is no more than
Step 3）The 10% of gained mixed material cumulative volume.
Specifically, the step 5）In, next batch feed liquid is hydrolyzed before acidifying, isolated in mixed material with
Next batch material liquid volume identical upper materials.
It is highly preferred that the step 3）In, the time of hydrolysis acidification is 18-22 days, the step 4）In, anaerobic fermentation
Time is 1-3 days.
Further, the step 3）In, the upper materials separated are used to produce biological organic fertilizer.
More specifically, the step 1）In, raw material is stalk, is crushed using mechanical crushing mode, the grain after crushing
Footpath is less than 2cm.
Embodiment one
A kind of technique of bionic anaerobic fermentation Biogas of the present invention, comprises the following steps：
1）Pretreatment of raw material, takes maize straw, is crushed；
2）Material allocation, takes gained maize straw after above-mentioned crushing, adds water, and stirring obtains feed liquid, the solid content for making feed liquid is
5%, the temperature of feed liquid is 34 DEG C；
3）Hydrolysis acidification, takes above-mentioned feed liquid, adds biogas slurry, and intermittent aerating, aeration frequencies are 4min/2h, and aeration intensity is
9mLO2/ (gvs), at 34 DEG C, hydrolysis acidification obtains mixed material, and part mixes material is carried out into separation of solid and liquid daily, obtained
Hydrolyzate；
4）Anaerobic fermentation, takes above-mentioned hydrolyzate, and fermentation temperature is 34 DEG C, and anaerobic fermentation 2 days obtains biogas and biogas slurry；
5）Continuous production, collects above-mentioned biogas, and above-mentioned gained biogas slurry and above-mentioned remaining mixed material are used for into step 3）In under
The hydrolysis acidification of one batch material liquid, so circulation；
6）20 chargings of raw material Hydrolysis Acidification point by the gross, charging accumulation hydrolytic acidification time is 20 days, hydrolysis acidification every time
Obtained hydrolyzate enters anaerobic jar and carries out anaerobic fermentation daily, and hydrolysis acidification is completed after 20 days, and anaerobic fermentation process is continuously transported
Row 22 days, terminates the methane producing process.
Embodiment two
A kind of technique of bionic anaerobic fermentation Biogas of the present invention, comprises the following steps：
1）Pretreatment of raw material, rice straw of fetching water, is crushed by the way of mechanical crushing, and the particle diameter after crushing is less than 2cm；
2）Material allocation, takes gained rice straw after above-mentioned crushing, adds water, and stirring obtains feed liquid, the solid content for making feed liquid is
7%, the temperature of feed liquid is 38 DEG C；
3）Hydrolysis acidification, takes above-mentioned gained feed liquid, adds biogas slurry, and intermittent aerating, aeration frequencies 6min/2h, aeration intensity
10mLO2/ (gvs), at 38 DEG C, hydrolysis acidification obtains mixed material, every 0.5 day by the 10% of mixed material cumulative volume it is mixed
Compound material carries out separation of solid and liquid, obtains hydrolyzate；
4）Anaerobic fermentation, takes above-mentioned hydrolyzate, regulation fermentation temperature is 38 DEG C, and anaerobic fermentation 1 day obtains biogas and biogas slurry；
5）Continuous production, collects biogas, biogas slurry is in hydrolysis acidification step reuse, the capacity of returns of biogas slurry and the hydrolyzate of above-mentioned discharge
Volume it is equal, for the hydrolysis acidification of next batch feed liquid, so repeatedly, to realize that continous way bionic anaerobic ferments methane phase
Gas；
6）36 chargings of raw material Hydrolysis Acidification point by the gross, charging accumulation hydrolytic acidification time is 18 days, hydrolysis acidification every time
Obtained hydrolyzate enters anaerobic jar for every 0.5 day and carries out anaerobic fermentation, and hydrolysis acidification is completed after 18 days, and anaerobic fermentation process is continuous
Operation 19 days, terminates the methane producing process.
Embodiment three
A kind of technique of bionic anaerobic fermentation Biogas of the present invention, comprises the following steps：
1）Pretreatment of raw material, takes wheat stalk, is crushed by the way of mechanical crushing, and the particle diameter after crushing is 1cm；
2）Material allocation, takes gained wheat stalk after above-mentioned crushing, adds water, obtain feed liquid, and the solid content for making feed liquid is 8%, feed liquid
Temperature be 40 DEG C；
3）Hydrolysis acidification, takes above-mentioned gained feed liquid, adds biogas slurry, and intermittent aerating, aeration frequencies 8min/2h, aeration intensity
12mLO2/ (gvs), at 40 DEG C, hydrolysis acidification obtains mixed material, every 1.5 days by the 5% of mixed material cumulative volume it is mixed
Compound material carries out separation of solid and liquid, obtains hydrolyzate；
4）Anaerobic fermentation, takes above-mentioned hydrolyzate, regulation fermentation temperature is 40 DEG C, and anaerobic fermentation 3 days obtains biogas and biogas slurry；
5）Continuous production, collects biogas, biogas slurry is in hydrolysis acidification step reuse, the capacity of returns of biogas slurry and the hydrolyzate of above-mentioned discharge
Volume it is equal, for the hydrolysis acidification of next batch feed liquid, next batch feed liquid is hydrolyzed before acidifying, in mixed material
In isolate with next batch material liquid volume identical upper materials, so repeatedly, with realize continous way bionic anaerobic fermentation production
Methane gas；
6）13 chargings of raw material Hydrolysis Acidification point by the gross, charging accumulation hydrolytic acidification time is 22 days, hydrolysis acidification every time
Obtained hydrolyzate enters anaerobic jar for every 1.5 days and carries out anaerobic fermentation, and hydrolysis acidification is completed after 22 days, and anaerobic fermentation process is continuous
Operation 25 days, terminates the methane producing process.
Example IV
A kind of technique of bionic anaerobic fermentation Biogas of the present invention, comprises the following steps：
1）Pretreatment of raw material, takes maize straw, is crushed in pulverizer 1；
2）Material allocation, takes step 1）Gained stalk is put into preparing pool 2, adds water, and stirring obtains feed liquid, the solid content of feed liquid
For 5%, the temperature of feed liquid is set to be 34 DEG C by heat exchanger 8；
3）Hydrolysis acidification, by step 2）Gained feed liquid is delivered in hydrolization and acidification tank 3 by delivery pump 10, passes through hydrolization and acidification tank
The addition biogas slurry of spray equipment 5 at 3 tops, and intermittent aerating is carried out using aerator 6, aeration frequencies are 4min/2h, and aeration is strong
Spend for 12mLO2/ (gvs), the temperature that hydrolysis acidification is adjusted by the heat exchanger 8 being connected with hydrolization and acidification tank 3 is 34 DEG C, is entered
Row hydrolysis acidification, obtains mixed material, daily by 10% mixed material of mixed material cumulative volume, inside hydrolization and acidification tank 3
Solid-liquid separator 7 isolate liquid, obtain hydrolyzate；
4）Anaerobic fermentation, by step 3）Gained hydrolyzate is fed directly to anaerobic fermentation tank 4, by being connected with anaerobic fermentation tank 4
Heat exchanger 8 control the temperature of anaerobic fermentation to be 34 DEG C, carry out anaerobic fermentation, anaerobic fermentation 1 day obtains biogas and biogas slurry；
5）Continuous production, utilizes the collection step 4 of caisson 9）Gained biogas, by step 4）Gained biogas slurry passes through spray equipment 5
Hydrolization and acidification tank 3 is back to, pretreatment of raw material, material allocation is re-started, and deployed feed liquid is delivered to hydrolysis again
Souring tank 3, using the backflow of spray equipment 5 by last batch step 4）Obtained biogas slurry and last batch step 3）It is remaining mixed
Compound material is used for step 3 together）The hydrolysis acidification of middle batch feed liquid；The top of hydrolization and acidification tank 3 is provided with overfall, this batch
Mixed material of feed liquid when being added to hydrolization and acidification tank 3 in hydrolization and acidification tank 3 in have the upper materials of same volume from water
Solve the overfall discharge at the top of souring tank 3；After hydrolysis acidification is finished, according to step 4）Method proceed anaerobic fermentation,
The material discharged from overfall is used to produce biological organic fertilizer；So circulation, so as to realize continuous production；
6）20 chargings of raw material Hydrolysis Acidification point by the gross, charging accumulation hydrolytic acidification time is 18 days, hydrolysis acidification every time
Obtained hydrolyzate enters anaerobic jar and carries out anaerobic fermentation daily, and hydrolysis acidification is completed after 18 days, and anaerobic fermentation process is continuously transported
Row 19 days, terminates the methane producing process.
Embodiment five
A kind of technique of bionic anaerobic fermentation Biogas of the present invention, comprises the following steps：
1）Pretreatment of raw material, takes maize straw, is crushed in pulverizer 1, and the particle diameter after crushing is less than 1cm；
2）Material allocation, takes step 1）Gained maize straw is put into preparing pool 2, adds water, stirring obtains feed liquid, and feed liquid contains
Gu rate is 8%, the temperature of feed liquid is set to be 39 DEG C by heat exchanger 8；
3）Hydrolysis acidification, by step 2）Gained feed liquid is delivered in hydrolization and acidification tank 3 by delivery pump 10, passes through hydrolization and acidification tank
The addition biogas slurry of spray equipment 5 at 3 tops, and intermittent aerating is carried out using aerator 6, aeration frequencies are 5min/2h, and aeration is strong
Spend for 10.26mLO2/ (gvs), the temperature for adjusting hydrolysis acidification by the heat exchanger 8 being connected with hydrolization and acidification tank 3 is 39
DEG C, acidifying is hydrolyzed, mixed material is obtained, daily by 8% mixed material of mixed material cumulative volume, passes through hydrolization and acidification tank 3
Internal solid-liquid separator 7 isolates liquid, obtains hydrolyzate；
4）Anaerobic fermentation, by step 3）Gained hydrolyzate is fed directly to anaerobic fermentation tank 4, by being connected with anaerobic fermentation tank 4
Heat exchanger 8 control the temperature of anaerobic fermentation to be 39 DEG C, carry out anaerobic fermentation, anaerobic fermentation 3 days obtains biogas and biogas slurry；
5）Continuous production, utilizes the collection step 4 of caisson 9）Gained biogas, by step 4）Gained biogas slurry passes through spray equipment 5
Hydrolization and acidification tank 3 is back to, pretreatment of raw material, material allocation is re-started, and deployed feed liquid is delivered to hydrolysis again
Souring tank 3, using the backflow of spray equipment 5 by last batch step 4）Obtained biogas slurry and last batch step 3）It is remaining mixed
Compound material is used for step 3 together）The hydrolysis acidification of middle batch feed liquid；The top of hydrolization and acidification tank 3 is provided with overfall, this batch
Feed liquid when being added to hydrolization and acidification tank 3, the upper materials of same volume are had in the mixed material in hydrolization and acidification tank 3 from water
Solve the overfall discharge at the top of souring tank 3；After hydrolysis acidification is finished, according to step 4）Method proceed anaerobic fermentation,
The material discharged from overfall is used to produce biological organic fertilizer；So circulation, so as to realize continuous production；
6）20 chargings of raw material Hydrolysis Acidification point by the gross, charging accumulation hydrolytic acidification time is 22 days, hydrolysis acidification every time
Obtained hydrolyzate enters anaerobic jar and carries out anaerobic fermentation daily, and hydrolysis acidification is completed after 22 days, and anaerobic fermentation process is continuously transported
Row 25 days, terminates the methane producing process.
To same amount of raw material respectively according to five kinds of bionic anaerobic zymotechniques of the embodiment of the present invention one to embodiment five
Biogas, determines the total gas production and unit raw material gas production of whole process, and experimental result is as shown in table 1；To identical quantity
Same materials, using existing traditional anaerobic ferment process（CSTR）Also respectively according to identical to embodiment five with embodiment one
Grinding mode, powder particle diameter, solid holdup, hydrolysis acidification temperature and hydrolytic acidification time, anaerobic fermentation temperature and anaerobic fermentation
Time produces methane gas, at least continuous operation identical time, and the total gas production and unit raw material for determining five comparative examples are produced
Tolerance, experimental result is also included in table 1.
Performance index statistical result under the different parameters of table 1
As can be seen from Table 1, compared with comparative example, under the same terms, the water of bionic anaerobic zymotechnique of the invention to raw material
Solution rate is higher, and the Volatile fatty acid contents after raw material hydrolysis acidification are more, so that advantageously in follow-up anaerobic fermentation；Cause
This, the total gas production and unit raw material gas production of biogas prepared by method of the invention are obviously higher than the tradition under the same terms
The total gas production and unit raw material gas production of the biogas of anaerobic ferment process.
By the bionic anaerobic zymotechnique of the present invention and existing traditional anaerobic ferment process（CSTR）Carry out existing pass
System anaerobic ferment process（CSTR）Comparative analysis, exemplified by handling 10,000 tons of stalk projects year, analysis result such as table 2 and the institute of table 3
Show.
The investment Cost Analysis result of table 2
Table 3 increases performance analysis result
It can be seen from table 2 and table 3 compared with existing anaerobic ferment process, under the conditions of same treatment, of the invention is bionical
The hydraulic detention time of anaerobic ferment process is 20 days, and tank body number is few, and the useful space utilization rate of tank body is high, can be significantly
Reduce the volume of tank body, can be 64.5 ten thousand yuan with investment reduction；Raw material factor of created gase, which is improved, is not less than 10%, biogas day volume increase
815.15m3, increase production 297529.75 yuan, 59.51 ten thousand yuan of annual increase income, with obvious economic benefit in year；System is more stablized,
System crash phenomenon caused by excessively acidifying will not be produced.
Therefore, the beneficial effects of the invention are as follows：The present invention separates material allocation, hydrolysis acidification and anaerobic fermentation step,
Raw material is first deployed into after feed liquid is hydrolyzed acidifying again, and the acid that separation of solid and liquid simulation rumen is carried out after hydrolysis acidification suppresses solution
Remove, salivation process is ruminated by biogas slurry reuse simulation；Hydrolyzate only part after hydrolysis acidification is used for anaerobic fermentation, remaining
Hydrolyzate together with the biogas slurry that anaerobic fermentation is produced be used for next batch feed liquid hydrolysis acidification, whole technique be one linkage
Process, hydrolysis acidification step is aerated to realize its micro- oxygen environment, and reaction temperature is consistent with temperature in cud, abundant mould
Ruminant tumor gastric digestion mechanism is intended, has significantly improved the efficiency of stalk hydrolysis acidification and anaerobic fermentation, shorten waterpower and stop
The time is stayed, construction investment cost is reduced, the economic benefit of biogas engineering is added.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
- The technique of Biogas 1. a kind of bionic anaerobic ferments, it is characterised in that comprise the following steps：1）Pretreatment of raw material, takes raw material, is crushed；2）Material allocation, takes step 1）Gained raw material, adds water, and stirring obtains feed liquid, the solid content of feed liquid is 5-8%, feed liquid Temperature is 34-40 DEG C；3）Hydrolysis acidification, takes step 2）Gained feed liquid, adds biogas slurry, and intermittent aerating, aeration frequencies are 4-8min/2h, aeration Intensity is 9-12mLO2/ (gvs), at 34-40 DEG C, hydrolysis acidification obtains mixed material, and part mixes material is consolidated Liquid is separated, and obtains hydrolyzate；4）Anaerobic fermentation, takes step 3）Gained hydrolyzate, at 34-40 DEG C, anaerobic fermentation obtains biogas and biogas slurry；5）Continuous production, collection step 4）Gained biogas, by step 4）Gained biogas slurry and step 3）Remaining mixed material is used for Step 3）The hydrolysis acidification of middle next batch feed liquid, so circulation.
- The technique of Biogas 2. bionic anaerobic according to claim 1 ferments, it is characterised in that：The step 3）In, addition and the step 4 of biogas slurry）The volume of middle taken hydrolyzate is equal.
- The technique of Biogas 3. bionic anaerobic according to claim 2 ferments, it is characterised in that：The step 3）In, the volume for carrying out the mixed material of separation of solid and liquid is no more than step 3）Gained mixed material cumulative volume 10%。
- The technique of Biogas 4. bionic anaerobic according to claim 1 ferments, it is characterised in that：The step 5）In, next batch feed liquid is hydrolyzed before acidifying, is isolated in mixed material and next group defective material Liquid accumulates identical upper materials.
- The technique of Biogas 5. bionic anaerobic according to claim 1 ferments, it is characterised in that：The step 3）In, the time of hydrolysis acidification is 18-22 days, the step 4）In, the time of anaerobic fermentation is 1-3 days.
- The technique of Biogas 6. bionic anaerobic according to claim 4 ferments, it is characterised in that：The step 5）In, the upper materials separated are used to produce biological organic fertilizer.
- The technique of Biogas 7. bionic anaerobic according to claim 1 ferments, it is characterised in that：The step 1）In, raw material is stalk, is crushed using mechanical crushing mode, and the particle diameter after crushing is less than 2cm.
- The technique of Biogas 8. bionic anaerobic according to claim 1 ferments, it is characterised in that：The step 2）Material allocation carried out in preparing pool, the preparing pool is connected with heat exchanger.
- The technique of Biogas 9. bionic anaerobic according to claim 8 ferments, it is characterised in that：The step 3）Hydrolysis acidification carried out in hydrolization and acidification tank, the hydrolization and acidification tank passes through delivery pump and the allotment Pond is connected, and the inside of the hydrolization and acidification tank is provided with solid-liquid separator, and the top of the hydrolization and acidification tank, which is provided with, to be used to spray natural pond The spray equipment of liquid, the hydrolization and acidification tank is also associated with aerator, and the hydrolization and acidification tank is also connected with heat exchanger.
- The technique of Biogas 10. bionic anaerobic according to claim 9 ferments, it is characterised in that：The step 4）Anaerobic fermentation carried out in anaerobic fermentation tank, the anaerobic fermentation tank passes through conveyance conduit and the water The bottom connection of souring tank is solved, the top of the anaerobic fermentation tank passes through biogas slurry pipeline and the spray equipment of the hydrolization and acidification tank The caisson for collecting biogas is also associated with the top of connection, the anaerobic fermentation tank, the anaerobic fermentation tank is also connected There is heat exchanger.
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| CN112725155A (en) * | 2021-02-07 | 2021-04-30 | 中国华电科工集团有限公司 | Biomass biogas preparation device and preparation method |
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| CN115466751A (en) * | 2022-10-11 | 2022-12-13 | 贵州大学 | Promote high intrinsic quick-witted discarded object CH that contains 4 Yield and H 2 Method and device for controlling S rate |
| CN115466751B (en) * | 2022-10-11 | 2023-09-22 | 贵州大学 | Promote high inherent quick-witted discarded object CH that contains 4 Yield and H 2 Method and device for S control rate |
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