CN104004795B - A kind of two sections of dry method digestion methods of discarded object and its device - Google Patents
A kind of two sections of dry method digestion methods of discarded object and its device Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
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- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/18—External loop; Means for reintroduction of fermented biomass or liquid percolate
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- 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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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The present invention provides a kind of two sections of dry method digestion methods of discarded object and device.Waste materials microbe inoculation first in first paragraph reactor, abundant fermentation and acid, production acid is used in alkaline matter and organic acid for adjusting pH value after terminating, and carries out the dry method fermentation that second segment produces methane.Realizing the technique of two sections of fermentation process includes microbial inoculant operating unit, acidogenic fermentation unit, regulation pH units and methane phase fermentation unit etc..The technique can be efficiently against organic acid in anaerobic digestion to digestion process suppression, do not wash, a large amount of waste water do not produced.
Description
Technical field
The present invention relates to offal treatment field, in particular it relates to a kind of continuous using the digestion of microorganism dry method
The method and apparatus for handling discarded object, suppression of the accumulation of organic acid to methane phase process is released especially with two reactor
System, it is adaptable to discarded object comprehensive grading utilization and advanced treating field.
Background technology
China has substantial amounts of solid-state biomass discarded object to need processing, such as majority cities rubbish air storage, production
The pernicious gases such as raw a large amount of heat energy and ammonia, methane and hydrogen sulfide, the too high formation stench of gas concentration surrounds city from aerial.Together
When, spontaneous combustion, self-destruction phenomenon can occur for these discarded objects.This not only influences urban landscape, while big gas and water and soil are polluted,
Health to town dweller constitutes a threat to, and rubbish turns into the thorny problem in urban development.
On the other hand, the characteristics of poor slag of industrial fiber matter fermentation has that amount is big, concentrated, these poor slags are rich in cellulose, are
The resource of concentration.15,000,000 tons of China's distillers ' grains yield, 8,000,000 tons of vinegar grain in 2008, but these poor slags present it is acid or
Alkalescence, is serious environomental pollution source.
The method of the Chinese house refuse of processing at present is in addition to air storage, also sanitary landfills and burning etc..Landfill process
Although the problem of avoiding air storage, floor space is big, and service life is relatively short, and wastes recoverable
Resource；Although burning can be substantially reduced the volume of rubbish, toxic gas, such as dioxin, sulfur-nitrogen compound, and produce can be discharged
Raw poisonous and harmful clinker and dust；Compost, this method need people by organic waste and other rubbish separately, it has
Good development prospect.In a word, it is currently largely non-classified just to fill or burn away the refuse, it is both the huge waste to resource, again
Secondary pollution can be produced.
Discarded object dry method digestion process process can use biogas, make full use of discarded in normal temperature, normal pressing operation, production
The useful constituents such as cellulose, lignin, albumen and carbohydrate in thing, greatly reduce the volume of discarded object, are heat-treated, fill out with chemical industry
Bury, the coupling such as burning electricity generation, realize waste's reclamation and improvement.
Useful constituent therein can be made full use of using dry method digestion process discarded object, realize waste's reclamation and
The purpose of decrement discharge, but the exploitation of traditional dry method digestion process and fermentation reactor is while achieve marked improvement, does
Method digestion process trivial operations, the key that restriction dry method digestion amplification and commercial application are still the problems such as the amount of labour is big, it is main
Wanting reason is：Dry method digestion process intermittently operated, handling labor intensity is big, if can realize in fermentation process continuous feed and go out
Material, can greatly improve the efficiency of fermentation（CN101177693A；CN102174591A；CN102174595A）.In addition, dry method disappears
Change process shortage technique is integrated, still suffers from many fermentation residues in discarded object dry method digestion process, it is necessary to further handle, because
This exploitation is biological, dry method digestion process operating cost can be greatly reduced in chemical industry coupling technique.During the fermentation, discarded object exists
Substantial amounts of organic acid can be produced in the presence of microorganism, causes pH value of reaction system to decline, suppression is produced to course of reaction, even
Cause course of reaction to terminate, therefore, digestion reaction can be promoted to carry out acid process and the separation of methane phase process, be conducive to carrying
The yield of high methane.CN102260019A, CA102674546A, CN85202346U, CN201962120U and CN2908481Y etc.
Also two sections of zymotechnique is used in patent, to handle discarded object, but these processing procedures be using by the way of washing by the
The organic acid of one section of generation is transferred to second segment, and the operating process of such equipment design can produce substantial amounts of waste water, Er Qiehui
Cause technological condition for fermentation more complicated.
The present invention is neutralized by the abundant fermentation and acid of first paragraph using alkaline matter, releasing fermentation intermediate product-organic
Regulation acid-base value to weakly alkaline fermentation substrate, is then transferred in second segment reactor and ferments by suppression of the acid to fermentation process
Methane phase, realizes the continuous operation and process integration of dry method digestion process.This method can solve dry method digestion trivial operations, labor
The problem of momentum is big, the amplification and production application for being conducive to dry method to digest.
The content of the invention
In view of the shortcomings of the prior art, an object of the present invention is to provide a kind of two sections of dry method digestion sides of discarded object
Method, this method be directed to discarded object dry method digestion process during produce a large amount of Accumulation of Organic Acids cause methane phase speed decline or
The problem of person terminates and a kind of system controllability and measurability for providing is strong, the two-stage reaction refuse processing method that can operate continuously, the party
The method that method uses biofermentation.
Methods described includes：Make the mixture of discarded object and microbial catalyst after first paragraph reactor fermentation and acid,
Alkaline matter regulation system pH to 7 ~ 9 is added, then, reaction substrate second segment reactor is delivered to, carries out methane phase reaction,
Realize that biocatalyst recycles the purpose with discarded object continuous processing.
The condition that the fermentation and acid and methane phaseization are reacted is art known technology, be will not be repeated here.
Preferably, the reacted reaction product of methane phase is mixed with discarded object, first paragraph reactor is transmitted back to again；It is excellent
Selection of land, described mixed with discarded object is transmitted back to the reaction product ratio of first paragraph reactor for 1wt% ~ 40wt% again, further
Preferably 3wt% ~ 35wt%, particularly preferably 5wt% ~ 30wt%.
The pH for adding system after alkaline matter can be 7.1,7.2,7.3,7.5,7.9,8.1,8.4,8.6,8.8,8.9
Deng preferably 7 ~ 8.5, particularly preferably 7 ~ 8.
Solid product after the completion of methane phase reaction, can pass through the side such as landfill, burning electricity generation, chemical conversion or heat treatment
Formula is further processed.
Preferably, the discarded object is in the poor slag of cellulose fermentation, domestic waste, kitchen garbage or agricultural wastes
1 kind or at least two kinds of of mixture；Preferably, the poor cinder ladle of the cellulose is included：The poor slag of distillers ' grains, vinegar grain, furfural dregs, Chinese medicine
Or a kind or at least two kinds of of mixture in wood chip discarded object.
Preferably, in the first paragraph reactor fermentation and acid temperature be 20 DEG C ~ 70 DEG C, more preferably 25 DEG C ~
65 DEG C, particularly preferably 30 DEG C ~ 55 DEG C.
Preferably, the fermentation and acid time is at least 2 days in the first paragraph reactor, such as 2.1 days, 2.2 days, 2.5 days,
2.9 days, 3.1 days, 4 days, 4.9 days, 5.1 days, 6 days, 10 days, 20 days, 39 days, 41 days, 45 days, 50 days, 59 days, 61 days, 70 days,
80 days etc., particularly preferably more preferably 3 ~ 60 days, 5 ~ 40 days.
Preferably, in the first paragraph reactor fermentation and acid pressure be normal pressure ~ 4MPa, such as 0.11MPa,
0.2MPa、0.3MPa、0.5MPa、1MPa、1.5MPa、1.9MPa、2.1MPa、2.5MPa、2.9MPa、3.1MPa、3.5MPa、
3.8MPa, 3.9MPa etc., more preferably normal pressure ~ 3MPa, particularly preferably normal pressure ~ 2MPa.The normal pressure refers to atmospheric pressure.
Preferably, the microbial catalyst and discarded object mass ratio are 1:100~30:100, more preferably 1.5:
100~25:100, particularly preferably 2:100~20:100.
Preferably, the microbial catalyst is used in the form of microbial catalyst concentrate；Preferably, micro- life
In thing concentrated catalyst solution the concentration of cell be 0.5g stem cells/L ~ 250g stem cells/L, more preferably 0.8g stem cells/
L ~ 200g stem cells/L, particularly preferably 1g stem cells/L ~ 50g stem cells/L.
Preferably, the alkaline matter is a kind or at least two kinds of in limewash, sodium hydroxide solution or the ammoniacal liquor of liquid
Mixture.
Preferably, the alkaline matter is the quick lime and/or sodium hydroxide of solid-state.
Methods described relieves fermentation intermediate product-suppression of the organic acid to fermentation process, and identical is constituted in discarded object
In the case of than existing process have higher methane production, and solve dry method digestion trivial operations, tedious problem, have
The amplification and production application digested beneficial to dry method；Meanwhile, the present invention is used in alkaline matter and organic acid, will not be produced in operation
Raw a large amount of waste water, realize solid state fermentation and the processing of continuous solid-state, can significantly reduce the volume of dry method slaking apparatus.
An object of the present invention also resides in a kind of two-part anaerobic digestion reaction unit of offer.Described device by production acid and
Methane phase two parts are constituted.Acid moieties are produced by using rotary kiln, microorganism fungus kind is well mixed with discarded object, fermentation production
Acid, meanwhile, the use of rotary kiln realizes the alkaline matter of solid-state（Or liquid）Quickly it is well mixed with reaction system, to adjust
Acid-base value.
The two-part anaerobic digestion reaction unit includes rotary kiln and second segment reactor successively according to flow direction of material；Institute
Rotary kiln front end is stated provided with charging aperture, rear end is provided with alkaline matter entrance and methane outlet.
Preferably, the rotary kiln is rotated for rotary kiln body of heater, or body of heater is fixed, and interior axle drives blade rotation；Institute
State rotary kiln rotation or stir so that material is well mixed with microorganism fungus kind, to greatest extent fermentation and acid, and makes basic species
Matter is well mixed rapidly in the solid state with reaction system.
Preferably, the rotary kiln front portion is provided with strain entrance, and the strain entrance is located at after charging aperture；Strain is independent
Rotary kiln is fed into, can avoid entering excessive air in reaction system, influence the progress of anaerobic reaction.
Preferably, the rotary kiln is single rotary kiln（As shown in Figure 2）；Preferably, the body of heater of the single rotary kiln
Fixed, inside is provided with interior axle, and the blade in interior axle can be driven to rotate, and is well mixed material in rotary kiln, promotes fermentation and acid
It is quick to carry out.
Preferably, the rotary kiln is divided into the first rotary kiln and second rotary kiln two parts（As shown in Figure 3）, it is described
First rotary kiln front end sets charging aperture, and the second rotary kiln front end sets alkaline matter entrance, and rear end sets methane outlet；
In this rotary structure, it can select to be not provided with special strain entrance, strain enters with discarded object from charging aperture；Fermentation production
Acid reaction is carried out in the first rotary kiln, and the effect of second rotary kiln is only the product and basic species for reacting fermentation and acid
Matter sends into second segment reactor after being mixed；Preferably, the first rotary kiln body of heater rotation；Preferably, described second time
Rotary kiln body of heater is fixed, and inside drives the blade rotation in interior axle provided with interior axle.The design of two sections of rotary kilns, it is possible to prevente effectively from oxygen
Gas enters second segment reactor, it is to avoid the suppression that oxygen reacts methane phaseization.
Preferably, the two-part anaerobic digestion reaction unit is anti-comprising rotary kiln and second segment successively according to flow direction of material
Answer device；The rotary kiln front end is sequentially provided with charging aperture and strain entrance according to flow direction of material, rear end according to flow direction of material successively
Provided with alkaline matter entrance and methane outlet；The rotary kiln body of heater is fixed, and inside is provided with interior axle, can drive the blade in interior axle
Rotation.
Preferably, the two-part anaerobic digestion reaction unit is anti-comprising rotary kiln and second segment successively according to flow direction of material
Answer device；The rotary kiln is divided into the first rotary kiln and the second rotary kiln, and the first rotary kiln front end is provided with charging aperture, the
Two-revolution kiln front end is provided with alkaline matter entrance, and rear end is provided with methane outlet；The first rotary kiln body of heater rotation, described second
Rotary kiln body of heater is fixed, and inside drives the blade rotation in interior axle provided with interior axle.
An object of the present invention, which is also resided in, provides a kind of purposes of the two-part anaerobic digestion reaction unit, described two
Segmentation anaerobic digestion reaction unit is used for discarded object two-part dry method digestion method.
Compared with prior art, the present invention has the advantage that：
（1）Discarded object fermentation process is divided into the two sections of progress of production acid and methane phase, fermentation process intermediate product can be released
Inhibitory action, the discarded object conversion ratio of digestion process and the yield of methane can be improved.
（2）Pass through first paragraph reactor（Rotary kiln）Rotation or stirring reactor, realize uniform inoculation, fully fermentation
It can also realize that discarded object is mixed with the uniform of alkaline matter afterwards.
（3）Pass through first paragraph reactor（Rotary kiln）Rotation or stirring reactor, realize solid-state alkaline matter with it is anti-
Answer the rapid uniform mixing of system, it is to avoid the use of a large amount of water needed for liquid system, therefore can significantly reduce reaction unit
Volume.
（4）By fermentation process, useful constituent therein is made full use of, the high-valued classification profit of discarded object is realized
With the volume of reduction discarded object.
（5）By being combined with chemical processes such as heat treatment, landfill or burning electricity generations, discarded object harmless treatment is realized.
Brief description of the drawings
Fig. 1 is the process chart of an embodiment of two sections of dry method digestion methods of discarded object of the present invention；
Fig. 2 is the structural representation of an embodiment of two-part anaerobic digestion reaction unit of the present invention；
Fig. 3 is the structural representation of an embodiment of two-part anaerobic digestion reaction unit of the present invention；
Reference is as follows：
1-charging aperture；2-alkaline matter entrance；3-strain entrance；
4-rotary kiln；5-second segment reactor；41-the first rotary kiln；
42-the second rotary kiln；6-methane phase reacting product outlet；
7-rotary kiln methane outlet.
Embodiment
For ease of understanding the present invention, it is as follows that the present invention enumerates embodiment.Those skilled in the art are it will be clearly understood that the implementation
Example is only to aid in understanding the present invention, is not construed as the concrete restriction to the present invention.
The cultural method for the anaerobe catalysis that following examples and comparative example are used is as follows：
Microorganism fungus kind is enriched microorganism catalyst in the anaerobic sludge, sewage sludge and septic tank sludge being enriched with,
37 DEG C of cultivation temperature, culture environment is anaerobism, and incubation time is 7 days to 20 days.
Culture medium (g/L)：K2HPO40.4, KH2PO40.4, NH4Cl1.0, MgCl21.0, yeast extract 1.0, half Guang ammonia
Acid 0.5；0.1% resazurin solution 2.0mL, trace element solution 10.0mL, vitamin solution 10.0mL.
The composition (g/L) of trace element solution：MgSO4·7H2O3.0, CoCl20.1, MnSO4·2H2O05, CaC12·
2H2O0.1, ZnSO4·7H2O0.1, NaCl1.0, FeSO4·7H2O0.1, CuSO4·5H2O0.01, KAl (SO4)20.01,
H3BO30.01, NaMoO4·2H2O0.01。
The composition (mg/L) of vitamin solution：Thiamine (Bl) 5.0, calcium pantothenate 5.0, riboflavin (B2) 5.0, biotin
2.0, folic acid 2.0, Bl:0.1, nicotinic acid 5.0, p-aminobenzoic acid 5.0, lipoic acid 5.0.Trace element solution and vitamin solution
With 0.22 μm of micropore filtering film filtration sterilization after preparing, 4 DEG C of refrigerators are put into stand-by.
Embodiment 1：Two sections of dry method digestion of domestic waste
The two-part anaerobic digestion reaction unit that the present embodiment is used（As shown in Figure 2）Included back successively according to flow direction of material
Rotary kiln 4 and second segment reactor 5；The front end of rotary kiln 4 is sequentially provided with charging aperture 1 and strain entrance 3 according to flow direction of material, after
End is sequentially provided with alkaline matter entrance 2 and rotary kiln methane outlet 7 according to flow direction of material；The body of heater of rotary kiln 4 is fixed, internal
Provided with interior axle, the blade in interior axle can be driven to rotate；The top of second segment reactor 5 goes out provided with second segment reactor biogas
Mouthful, bottom is provided with methane phase reacting product outlet 6, and the methane phase reacting product outlet 6 is connected with charging aperture 1.
The domestic waste of collection is classified first, metallics therein, plastics and stone etc. are removed, in mixing pit
In be well mixed, pass through charging aperture 1 enter rotary kiln 4；By the microbial catalyst of culture, centrifuged by supercentrifuge dense
Contracting, enters rotary kiln for 25g/L microbial catalyst by 500L concentration by strain entrance 3.Rotary kiln interior axle drives blade
Rotation so that the discarded object that microbial catalyst is mixed with 8000kg is mixed by deflection plate, using rotary kiln as first paragraph dry method
Digestion reactor ferments, fermentation temperature：37 DEG C, ferment pressure：Normal pressure, fermentation time 10 days, the concentration of organic acid can reach
0.05g/g discarded objects, pH value drops to 5.0 by 7.3.Quick lime is added to rotary kiln by alkaline matter entrance so that raw
The discarded object that lime is completed with fermentation and acid is sufficiently mixed, and adjusts the pH value of fermentation substrate to 8, substrate then is transferred into second
Section reactor 5, carries out methane phase reaction, tunning is separated at ambient pressure, collects fermentation gas, and gas production is
58L/kg dry weight discarded objects, the concentration of methane reaches after 57%, fermentation ends that it is anti-that 20% product circulation in second segment is returned into first paragraph
Answer device rotary kiln 4 as the strain and reaction raw materials of fermentation, another part couples further advanced treating with burning process.
Embodiment 2：Domestic waste mixes two sections of dry method digestion with kitchen garbage
The two-part anaerobic digestion reaction unit that the present embodiment is used digests by first paragraph dry method of two series connection rotary kilns
Reactor（As shown in Figure 3）, it includes rotary kiln 4 and second segment reactor 5 successively according to flow direction of material；The rotary kiln 4 according to
Secondary to be divided into the first rotary kiln 41 and the second rotary kiln 42, the front end of the first rotary kiln 41 is provided with charging aperture 1, the second rotary kiln 42
Front end is provided with alkaline matter entrance 2, and rear end is provided with rotary kiln methane outlet 7；The body of heater of first rotary kiln 41 rotation, described the
The body of heater of two-revolution kiln 42 is fixed, and inside is provided with interior axle, drives the blade rotation in interior axle；The top of second segment reactor 5 is set
There is second segment reactor methane outlet, bottom is provided with methane phase reacting product outlet 6, the methane phase reacting product outlet
6 are connected with charging aperture 1.
The domestic waste of collection is classified first, metallics therein, plastics and stone etc. is removed not metabolizable
Class discarded object, is then well mixed in mixing pit with kitchen garbage；By the microbial catalyst of sewage sludge culture, pass through
Supercentrifuge centrifugal concentrating, after 300L concentration is mixed for the discarded object that 20g/L microbial catalyst is mixed with 4000kg,
The mixed fermentation of first rotary kiln 41, fermentation temperature are entered by charging aperture 1：37 DEG C, fermentation time 15 days, ferment pressure：Normal pressure,
The second rotary kiln 42 was transported at the 15th day, and a certain amount of quick lime is added by alkaline matter entrance 2 and is sufficiently mixed, is adjusted
The pH value of fermentation substrate is to 8.Then substrate is transferred to second segment reactor 5, methane phase reaction, methane is carried out at ambient pressure
Then yield is separated tunning up to 67L/kg dry weight discarded objects, collects fermentation gas, after fermentation ends, by the
15% tunning is recycled back to the first rotary kiln of first paragraph reactor and is used as the strain of fermentation and reaction former in second-stage reaction
Material, another part couples further advanced treating with burning process.
Embodiment 3：Domestic waste mixes two sections of dry method digestion with trade waste
The device that the present embodiment is used is substantially the same with embodiment 2, is digested by first paragraph dry method of two series connection rotary kilns
Reactor, difference is that the first rotary kiln front portion is provided with strain entrance, and it is located at after charging aperture.
Domestic waste by screening is mixed with vinasse, mixed proportion is 1: 1, and by 2000kg, the mixture passes through
Charging aperture 1 sends into the first rotary kiln 41；By the microbial catalyst of anaerobic sludge culture, by supercentrifuge centrifugal concentrating,
1000L concentration is entered into the first rotary kiln 41 for 10g/L microbial catalyst by strain entrance, with the discarded object mixed
Pass through deflection plate mixed fermentation, fermentation temperature：37 DEG C, fermentation time 10 days, ferment pressure：Normal pressure, it is organic by testing and analyzing
The fermentation yield of acid is 0.07g/g discarded objects, the second rotary kiln 42 is transported at the 10th day, and add by alkaline matter entrance 2
Enter a certain amount of quick lime to be sufficiently mixed, adjust the pH value of fermentation substrate to 7.5.Then substrate is transferred to second segment reactor
Second segment reactor 5, carries out methane phase reaction at ambient pressure, collects fermentation gas, and gas yield is useless up to 52L/kg dry weights
After gurry, fermentation ends, the first rotary kiln that in second segment 12% tunning is recycled back to first paragraph reactor is used as fermentation
Strain and reaction raw materials, another part with landfill the further advanced treating of PROCESS COUPLING.
The kitchen garbage of embodiment 4 mixes two sections of dry method digestion with agricultural wastes
The device that the present embodiment is used is substantially the same with embodiment 1, and difference exists, in the device that the present embodiment is used,
The body of heater of rotary furnace 1 rotates.
The kitchen garbage and agricultural wastes of collection are well mixed in mixing pit first, entered back by charging aperture 1
Rotary kiln 4；By the microbial catalyst of culture, by supercentrifuge centrifugal concentrating, by the microorganism that 500L concentration is 250g/L
Catalyst enters rotary kiln by strain entrance 3.Rotary kiln interior axle drives blade rotation so that microbial catalyst and 6000kg
The discarded object of mixing is mixed by deflection plate, is fermented by first paragraph dry method digestion reactor of rotary kiln, fermentation temperature：20 DEG C,
Ferment pressure：4MPa, fermentation time 60 days, the concentration of organic acid can reach 0.15g/g discarded objects, and pH value is dropped to by 7.6
4.8.Ammoniacal liquor is added to rotary kiln by alkaline matter entrance so that the discarded object that ammoniacal liquor is completed with fermentation and acid is fully mixed
Close, adjust the pH value of fermentation substrate to 7, substrate is then transferred to second segment reactor 5, methane phaseization is carried out at ambient pressure anti-
Should, tunning is separated, fermentation gas is collected, gas production is 36L/kg dry weight discarded objects, and the concentration of methane reaches
57%, after fermentation ends, 1% product circulation in second segment is returned to first paragraph reactor rotary kiln 4 as the strain and reaction fermented
Raw material, another part couples further advanced treating with burning process.
Embodiment 5：Domestic waste mixes two sections of dry method digestion with kitchen garbage
The device that the present embodiment is used is same as Example 2.
The domestic waste of collection is classified first, metallics therein, plastics and stone etc. is removed not metabolizable
Class discarded object, is then well mixed in mixing pit with kitchen garbage；By the microbial catalyst of sewage sludge culture, pass through
Supercentrifuge centrifugal concentrating, 800L concentration is mixed for the discarded object that 0.5g/L microbial catalyst is mixed with 4000kg
Afterwards, the mixed fermentation of the first rotary kiln 41, fermentation temperature are entered by charging aperture 1：70 DEG C, fermentation time 2 days, ferment pressure：
3.5MPa, the second rotary kiln 42 was transported at the 2nd day, and it is abundant by alkaline matter entrance 2 to add a certain amount of sodium hydroxide
Mixing, adjusts the pH value of fermentation substrate to 9.Then substrate is transferred to second segment reactor 5, methane phase is carried out at ambient pressure
Reaction, is then separated tunning, collects fermentation gas, and gas production is 43L/kg dry weight discarded objects, the concentration of methane
Reach after 52%, fermentation ends, 40% tunning is recycled back to the first rotary kiln of first paragraph reactor during second segment is reacted
As the strain and reaction raw materials of fermentation, another part couples further advanced treating with burning process.
Comparative example：Domestic waste dry method digests
Domestic waste will be well mixed in mixing pit first；It regard the anaerobic sludge of above-mentioned culture as microorganism
Catalyst, by supercentrifuge centrifugal concentrating, by microbial catalyst and 10kg house refuse of the 400mL concentration for 22g/L
Mixture is mixed by deflection plate, is fermented in dry method digestion reactor, fermentation temperature：30 DEG C, fermentation time 20 days, fermentation
Pressure normal pressure, tunning is separated, and is collected after fermentation gas, fermentation ends, and gas production is given birth to for 30L/kg dry weights city
Rubbish living, the content of methane is 47% wherein in gas.10% tunning is recycled back to mixing pit as the strain of fermentation, separately
90% fermentation residue landfill.
From above experimental result, by the present invention in that with technique of the present invention and device, adding alkaline matter and disappearing
Suppression except intermediate product organic acid to methanation reaction, improves methane production, with high industrial application value.
Applicant states that the present invention illustrates detailed process equipment and the technological process of the present invention by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, do not mean that the present invention has to rely on above-mentioned detailed
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (28)
1. a kind of two sections of dry method digestion methods of discarded object, including：Make the mixture of discarded object and microbial catalyst in first paragraph
After reactor fermentation and acid, alkaline matter regulation system pH to 7~9 is added, then, reaction substrate second segment reaction is delivered to
Device, carries out methane phase reaction, realizes that biocatalyst recycles the purpose with discarded object continuous processing；
The reacted reaction product of methane phase is mixed with discarded object, first paragraph reactor is transmitted back to again；Described and discarded object
The reaction product ratio that mixing is transmitted back to first paragraph reactor again is 1wt%~40wt%；
The microbial catalyst is 1 with discarded object mass ratio:100~30:100；
The microbial catalyst is used in the form of microbial catalyst concentrate；
The concentration of cell is 0.5g stem cells/L~250g stem cells/L in the microbial catalyst concentrate；
The alkaline matter is the quick lime and/or sodium hydroxide of solid-state；
Methods described uses a kind of two-part anaerobic digestion reaction unit, and described device is made up of production acid and methane phase two parts,
Production acid moieties use rotary kiln, and described device includes rotary kiln and second segment reactor successively according to flow direction of material；The revolution
Kiln front end is provided with charging aperture, and rear end is provided with alkaline matter entrance and methane outlet；
The rotary kiln is rotated for rotary kiln body of heater, or body of heater is fixed, and interior axle drives blade rotation.
2. the method as described in claim 1, it is characterised in that described mixed with discarded object is transmitted back to first paragraph reactor again
Reaction product ratio be 3wt%~35wt%.
3. method as claimed in claim 2, it is characterised in that described mixed with discarded object is transmitted back to first paragraph reactor again
Reaction product ratio be 5wt%~30wt%.
4. the method as described in claim 1, it is characterised in that the pH for adding system after alkaline matter is 7~8.5.
5. method as claimed in claim 4, it is characterised in that the pH for adding system after alkaline matter is 7~8.
6. the method as described in claim 1, it is characterised in that the discarded object is the poor slag of cellulose, domestic waste, meal
1 kind or at least two kinds of of mixture in kitchen rubbish or agricultural wastes.
7. method as claimed in claim 6, it is characterised in that the poor cinder ladle of the cellulose is included：Distillers ' grains, vinegar grain, furfural dregs,
1 kind or at least two kinds of of mixture in Chinese medicine grain slag or wood chip discarded object.
8. the method as described in claim 1, it is characterised in that the temperature of fermentation and acid is 20 DEG C in the first paragraph reactor
~70 DEG C.
9. method as claimed in claim 8, it is characterised in that the temperature of fermentation and acid is 25 DEG C in the first paragraph reactor
~65 DEG C.
10. method as claimed in claim 9, it is characterised in that the temperature of fermentation and acid is 30 in the first paragraph reactor
DEG C~55 DEG C.
11. the method as described in claim 1, it is characterised in that the fermentation and acid time is at least 2 in the first paragraph reactor
My god.
12. method as claimed in claim 11, it is characterised in that in the first paragraph reactor fermentation and acid time be 3~
60 days.
13. method as claimed in claim 12, it is characterised in that in the first paragraph reactor fermentation and acid time be 5~
40 days.
14. the method as described in claim 1, it is characterised in that the pressure of fermentation and acid is normal in the first paragraph reactor
Pressure~4MPa.
15. method as claimed in claim 14, it is characterised in that the pressure of fermentation and acid is normal in the first paragraph reactor
Pressure~3MPa.
16. method as claimed in claim 15, it is characterised in that the pressure of fermentation and acid is normal in the first paragraph reactor
Pressure~2MPa.
17. the method as described in claim 1, it is characterised in that the microbial catalyst is 1.5 with discarded object mass ratio:
100~25:100.
18. method as claimed in claim 17, it is characterised in that the microbial catalyst is 2 with discarded object mass ratio:
100~20:100.
19. the method as described in claim 1, it is characterised in that the concentration of cell is in the microbial catalyst concentrate
0.8g stem cells/L~200g stem cells/L.
20. method as claimed in claim 19, it is characterised in that the concentration of cell is in the microbial catalyst concentrate
1g stem cells/L~50g stem cells/L.
21. the method as described in claim 1, it is characterised in that the rotary kiln front portion is provided with strain entrance, and the strain enters
Mouth is located at after charging aperture.
22. the method as described in claim 1, it is characterised in that the rotary kiln is single rotary kiln.
23. method as claimed in claim 22, it is characterised in that the body of heater of the single rotary kiln is fixed, inside is provided with interior
Axle, can drive the blade in interior axle to rotate.
24. the method as described in claim 1, it is characterised in that the rotary kiln is divided into the first rotary kiln and second time
Rotary kiln two parts, the first rotary kiln front end sets charging aperture, and the second rotary kiln front end sets alkaline matter entrance, after
End sets methane outlet.
25. method as claimed in claim 24, it is characterised in that the first rotary kiln body of heater rotation.
26. method as claimed in claim 24, it is characterised in that the second rotary kiln body of heater is fixed, inside is provided with interior axle,
Drive the blade rotation in interior axle.
27. the method as described in claim 1, it is characterised in that the two-part anaerobic digestion reaction unit is according to material stream
To successively comprising rotary kiln and second segment reactor；The rotary kiln front end is sequentially provided with charging aperture and strain according to flow direction of material
Entrance, rear end is sequentially provided with alkaline matter entrance and methane outlet according to flow direction of material；The rotary kiln body of heater is fixed, and inside is set
There is interior axle, the blade in interior axle can be driven to rotate.
28. the method as described in claim 1, it is characterised in that the two-part anaerobic digestion reaction unit is according to material stream
To successively comprising rotary kiln and second segment reactor；The rotary kiln is divided into the first rotary kiln and the second rotary kiln, described
First rotary kiln front end is provided with charging aperture, and the second rotary kiln front end is provided with alkaline matter entrance, and rear end is provided with methane outlet；It is described
First rotary kiln body of heater is rotated, and the second rotary kiln body of heater is fixed, and inside is provided with interior axle, drives the blade rotation in interior axle.
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| CN201310056268.2A CN104004795B (en) | 2013-02-21 | 2013-02-21 | A kind of two sections of dry method digestion methods of discarded object and its device |
| PCT/CN2013/083985 WO2014127636A1 (en) | 2013-02-21 | 2013-09-23 | Method and device for two-stage dry digestion of wastes |
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| CN201310056268.2A CN104004795B (en) | 2013-02-21 | 2013-02-21 | A kind of two sections of dry method digestion methods of discarded object and its device |
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| CN101130747A (en) * | 2007-08-17 | 2008-02-27 | 浙江大学 | Technology for methanation processing consumer waste step by step and bioreactor |
| CN102153297A (en) * | 2010-11-29 | 2011-08-17 | 赵楠 | Method and equipment for treating town sludge by novel dry-method cement kiln |
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| CN102174599A (en) * | 2010-08-31 | 2011-09-07 | 南京工业大学 | Method for biologically converting waste cells generated by succinic acid ferment into succinic acid |
| CN102212561B (en) * | 2011-05-05 | 2013-06-26 | 郑州蓝德环保科技有限公司 | Processing method for fermenting straws in dry-process and wet-process combined way |
| CN202063914U (en) * | 2011-05-05 | 2011-12-07 | 北京水气蓝德环保科技有限公司 | Organic garbage dry fermentation processor |
| CN102286361B (en) * | 2011-07-13 | 2012-12-26 | 南开大学 | Biomass fermentation reaction device and application |
| CN102321675B (en) * | 2011-08-26 | 2014-11-12 | 中国农业机械化科学研究院 | Method and device for producing bio-gas by organic waste |
| CN103173348B (en) * | 2011-12-22 | 2016-06-29 | 新奥科技发展有限公司 | Integrated two phase dry anaerobic digestion reactor and processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101130747A (en) * | 2007-08-17 | 2008-02-27 | 浙江大学 | Technology for methanation processing consumer waste step by step and bioreactor |
| CN102153297A (en) * | 2010-11-29 | 2011-08-17 | 赵楠 | Method and equipment for treating town sludge by novel dry-method cement kiln |
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