CN106929541A - A kind of method of industrial acid-sludge discarded object solid anaerobic digestion methane phase - Google Patents
A kind of method of industrial acid-sludge discarded object solid anaerobic digestion methane phase Download PDFInfo
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- CN106929541A CN106929541A CN201710289551.8A CN201710289551A CN106929541A CN 106929541 A CN106929541 A CN 106929541A CN 201710289551 A CN201710289551 A CN 201710289551A CN 106929541 A CN106929541 A CN 106929541A
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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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- 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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- Processing Of Solid Wastes (AREA)
Abstract
The invention provides the method that acid-sludge recycles a kind of industrial acid-sludge discarded object solid anaerobic digestion methane phase in field is belonged to, its step includes：(1) acid-sludge is dried at room temperature, then the dry acid-sludge in part is placed in fixed-bed pyrolysis retort, be pyrolyzed at 400 500 DEG C, acid-sludge charcoal is obtained；(2) obtained charcoal is added in acid-sludge as additive, and solid anaerobic digestion is carried out at 37 DEG C or so and produce biogas.Compared with prior art, raw material itself is changed into effective by the method for the invention, pollution-free, the charcoal additive having no side effect, it is combined with solid anaerobic digestion, enter without any other composition in addition to acid-sludge, it is few both to have highlighted solid state fermentation water consumption, without biogas slurry, the big advantage of volume aerogenesis, further improve anaerobic fermentation gas production efficiency on this basis again, be agriculture and industry waste efficient process, recycling provides new thinking.
Description
Technical field
The invention belongs to acid-sludge reutilization technology field, more particularly to a kind of industrial acid-sludge discarded object solid anaerobic digestion is produced
The method of methane.
Background technology
, used as a kind of accessory substance of vinegar industry processed, its annual production is huge, about 3,000,000 t for acid-sludge.Because acid-sludge has necessarily
Acidity and corrosivity, its arbitrarily disposal can cause a certain degree of environmental hazard.Acid-sludge is simultaneously or a kind of rich in wooden fibre
The raw material of element is tieed up, it is mainly by wheat bran, the biological material mixing composition of rice husk.Traditional processing method is as filled and burning not
A certain degree of secondary pollution can be only caused to environment, while being also a kind of waste to resource.And anaerobic fermentation technology is one
Planting can be inexpensive, and the free of contamination method that biomass castoff is changed into clean reproducible energy, profit in this way can
It is enough effectively to solve the environmental hazard that acid-sludge brings, while the considerable amount of fire damp energy can also be obtained.But traditional wet type
Not only gas production is low for fermentation, but also can produce substantial amounts of biogas slurry, and the treatment of these biogas slurries is still at present anaerobic fermentation technology
A great problem.By contrast, to possess power consumption few for solid state fermentation, is produced without biogas slurry, the advantages of volume gas production is high, if can be had
Effect development utilization, will can increase substantially the overall interests of anaerobic digestion, reduce processing cost, obtain more energy incomes.
At present, solid-state anaerobic digestion process is received more and more attention, but the solid-state fermentation process of acid-sludge does not have also
Obtain good development and utilization.This is that many deficiencies are also there are due to solid-state fermentation technology, such as the reaction time it is more long, inoculation
Thing demand is big etc.；And not yet there is the suitable additive that can effectively improve solid anaerobic digestion efficiency to be developed and profit
With.Used as the burning hoter brand-new material of Recent study, it has and activated carbon charcoal, the similar loose structure of bentonite
And adsorption capacity, mainly by biological material under anaerobism or anoxia condition, produced through the pyrolysis of uniform temperature.Its special knot
Structure can effectively adsorb the microorganism in surrounding environment, increase microbe density, for the growth and breeding of microorganism is provided well
Space, accelerate microorganism to utilize the decomposition of organic matter.Acid-sludge is the material composition by being much rich in lignocellulosic structure,
With the potential quality for preparing charcoal.Therefore present invention plan is used is made charcoal by acid-sludge pyrolysis, and as acid-sludge solid-state anaerobism
The additive of fermentation, to improve its fermentation efficiency.
The content of the invention
To solve problems of the prior art, given up it is an object of the invention to provide a kind of a kind of efficiently industrial acid-sludge
The method of gurry solid anaerobic digestion methane phase.
A kind of method of industrial acid-sludge discarded object solid anaerobic digestion methane phase of the present invention, comprises the following steps：
1) industrial acid-sludge is pyrolyzed charcoal processed：Acid-sludge is dried at room temperature, is then placed in fixed-bed pyrolysis retort,
1.5~3h is pyrolyzed at 400-500 DEG C, last Temperature fall is cooled to room temperature, acid-sludge charcoal is obtained；
2) acid-sludge solid anaerobic digestion：The acid-sludge that will be dried at room temperature as raw material, according to waving for acid-sludge and seed sludge
The ratio between hair property solids content is 2~3:1, fermentation system total solids content between 15~24% under conditions of by described acid-sludge
With seed sludge add anaerobic reactor in, be subsequently adding step 1) obtained in acid-sludge charcoal, add quality to be added vinegar
The 0.2~2% of slag raw material total solids content, after being well mixed, carries out the solid anaerobic digestion of 40~50 days by a definite date at 37 DEG C.
Step 1) in, the programming rate of fixed-bed pyrolysis retort was heated to 400-500 DEG C for 20-35 minutes from room temperature.
Step 2) in, the ratio between described acid-sludge and the volatile solid content of seed sludge are 2:1, fermentation system total solid
Content is 20%.
Step 2) in, add step 1) obtained in acid-sludge charcoal quality be add acid-sludge raw material total solids content
1%.
Step 2) in, fermentation time is 45 days.
Step 1) in, when acid-sludge is dried, acid-sludge is laid on ground at room temperature, natural drying after 3 days, it is to avoid high
Temperature drying causes structure to destroy.
Compared with prior art, innovation of the invention is：(1) it is former using this industrial or agricultural organic waste of acid-sludge
Material, the methane of regenerative resource is transformed into by anaerobic fermentation；(2) solid anaerobic digestion technology is used, is greatly reduced
Water consumption and other energy resource consumptions, and produced without biogas slurry；(3) using acid-sludge as pyrolysis feed, charcoal is prepared into, its vinegar
Slag charcoal yield can reach 30~35%；(4) acid-sludge solid anaerobic digestion is added using acid-sludge charcoal as additive, this
During enter without other any impurities, and fermentation efficiency can be improved, its accumulative units methane production rate is up to 170-250mL/g
VS, cumulative volume methane production rate is up to 20-35L/LWorking volume。
Brief description of the drawings
The method flow diagram of the industrial acid-sludge discarded object solid anaerobic digestion methane phase that Fig. 1 is provided for the present invention.
Specific embodiment
The present invention is described in further detail with reference to specific embodiment, but the invention is not restricted to following examples.
Embodiment 1
1) industrial acid-sludge is pyrolyzed charcoal processed：Acid-sludge is laid in ground first, natural drying after placing 3 days.Take about
100g total solids content TS=95.5%, the acid-sludge of volatile solid content VS=90.1% is placed on 500mL fixed beds heat
In solution retort.After 30 minutes heat, temperature rises to 400 DEG C from room temperature, and maintains 1.5h at this temperature, then natural
Room temperature is cooled to, its charcoal yield is up to 34.8%.
2) acid-sludge solid anaerobic digestion：Take 300g acid-sludges to be added in 5L anaerobic reactors, according to acid-sludge and seed sludge
The ratio between volatile solid content be 2, take total solids content TS=20.5%, the inoculation of volatile solid content VS=11.0%
Sludge 1302g is added in the anaerobic reactor of 5L, and adds 308g water, makes its system TS=15%.Then according to mass number
Be worth by addition acid-sludge TS numerical value 0.5%, obtained biological carbon 1.432g is used as additive after adding above-mentioned pyrolysis.Mixing is equal
Control anaerobic reactor temperature makes it be fermented 45 days at 37 DEG C after even.Whole solid anaerobic digestion process is calculated after fermentation ends
Gas production, its accumulative units methane production reach 180.5mL/g VS, cumulative volume factor of created gase reach 21.6L/LWorking volume, than same bar
Part system TS is that 5% liquid state fermentation for being not added with acid-sludge charcoal has been respectively increased 11.2% and 360%.
Embodiment 2
1) industrial acid-sludge is pyrolyzed charcoal processed：Acid-sludge is laid in ground first, natural drying after placing 3 days.Take about
100g total solids content TS=95.5%, the acid-sludge of volatile solid content VS=90.1% is placed on 500mL fixed beds heat
In solution retort.After 30 minutes heat, temperature rises to 450 DEG C from room temperature, and maintains 2h at this temperature, then naturally cold
But to room temperature.
2) acid-sludge solid anaerobic digestion：Take 400g acid-sludges to be added in 5L anaerobic reactors, according to acid-sludge and seed sludge
The ratio between volatile solid content be 2.5, take total solids content TS=20.5%, volatile solid content VS=11.0%'s connects
Kind sludge 1389g is added in the anaerobic reactor of 5L, and adds 139g water, makes its system TS=20%.Then according to quality
Numerical value by addition acid-sludge TS numerical value 1%, obtained biological carbon 3.82g is used as additive after adding above-mentioned pyrolysis.Mixing is equal
Control anaerobic reactor temperature makes it be fermented 45 days at 37 DEG C after even.Whole solid anaerobic digestion process is calculated after fermentation ends
Gas production, its accumulative units methane production reach 235.2mL/g VS, cumulative volume factor of created gase reach 32.9L/LWorking volume, than same bar
Part system TS is that 5% liquid state fermentation for being not added with acid-sludge charcoal has been respectively increased 47.5% and 548%.
Embodiment 3
1) industrial acid-sludge is pyrolyzed charcoal processed：Acid-sludge is laid in ground first, natural drying after placing 3 days.Take about
100g total solids content TS=95.5%, the acid-sludge of volatile solid content VS=90.1% is placed on 500mL fixed beds heat
In solution retort.After 30 minutes heat, temperature rises to 500 DEG C from room temperature, and maintains 2.5h at this temperature, then natural
It is cooled to room temperature.
2) acid-sludge solid anaerobic digestion：Take 500g acid-sludges to be added in 5L anaerobic reactors, according to acid-sludge and seed sludge
The ratio between volatile solid content be 3, take total solids content TS=20.5%, the inoculation of volatile solid content VS=11.0%
Sludge 1446g is added in the anaerobic reactor of 5L, and adds 66.1g water, makes its system TS=24%.Then according to mass number
Be worth by addition acid-sludge TS numerical value 1.5%, obtained biological carbon 7.462g is used as additive after adding above-mentioned pyrolysis.Mixing is equal
Control anaerobic reactor temperature makes it be fermented 45 days at 37 DEG C after even.Whole solid anaerobic digestion process is calculated after fermentation ends
Gas production, its accumulative units methane production reach 215.6mL/g VS, cumulative volume factor of created gase reach 28.7L/LWorking volume, than same bar
Part system TS is that 5% liquid state fermentation for being not added with acid-sludge charcoal has been respectively increased 34.7% and 478%.
Raw material itself is changed into effective by the method for the invention, pollution-free, the charcoal additive having no side effect, and solid
State anaerobic fermentation is combined, and without any other is that composition enters in addition to acid-sludge, that is, it is few to highlight solid state fermentation water consumption, without natural pond
Liquid, the big advantage of volume aerogenesis, and anaerobic fermentation gas production efficiency is further improved on this basis, it is efficient agriculture and industry waste
Treatment, recycling provides new thinking.
It is understood that above is example in order to illustrate principle of the invention and exploitativeness, the present invention not office
It is limited to this.For those skilled in the art, without departing from the spirit and substance in the present invention, can be with
All variations and modifications are made, these variations and modifications are also considered as protection scope of the present invention.
Claims (6)
1. a kind of method of industrial acid-sludge discarded object solid anaerobic digestion methane phase, it is characterised in that comprise the following steps：
1) industrial acid-sludge is pyrolyzed charcoal processed：Acid-sludge is dried at room temperature, is then placed in fixed-bed pyrolysis retort,
1.5~3h is pyrolyzed at 400-500 DEG C, last Temperature fall is cooled to room temperature, acid-sludge charcoal is obtained；
2) acid-sludge solid anaerobic digestion：The acid-sludge that will be dried at room temperature as raw material, according to acid-sludge and the volatility of seed sludge
The ratio between solids content is 2~3:1, fermentation system total solids content between 15~24% under conditions of by described acid-sludge and connect
Kind of sludge is added in anaerobic reactor, is subsequently adding step 1) obtained in acid-sludge charcoal, add quality to be added acid-sludge original
The 0.2~2% of material total solids content, after being well mixed, carries out the solid anaerobic digestion of 40~50 days by a definite date at 37 DEG C.
2. the method for industrial acid-sludge discarded object solid anaerobic digestion methane phase according to claim 1, it is characterised in that step
It is rapid 1) in, the programming rate of fixed-bed pyrolysis retort was heated to 400-500 DEG C for 20-35 minutes from room temperature.
3. the method for industrial acid-sludge discarded object solid anaerobic digestion methane phase according to claim 2, it is characterised in that step
It is rapid 2) in, the ratio between described acid-sludge and volatile solid content of seed sludge are 2:1, fermentation system total solids content is
20%.
4. the method for industrial acid-sludge discarded object solid anaerobic digestion methane phase according to claim 3, it is characterised in that step
It is rapid 2) in, add step 1) obtained in acid-sludge charcoal quality be add acid-sludge raw material total solids content 1%.
5. the method for industrial acid-sludge discarded object solid anaerobic digestion methane phase according to claim 4, it is characterised in that step
It is rapid 2) in, fermentation time be 45 days.
6. the method for the industrial acid-sludge discarded object solid anaerobic digestion methane phase according to any one in claim 1-5,
Characterized in that, step 1) in, when acid-sludge is dried, acid-sludge being laid on ground at room temperature, natural drying after 3 days is kept away
Exempting from high temperature drying causes structure to destroy.
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Cited By (3)
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| CN109182391A (en) * | 2018-10-15 | 2019-01-11 | 湖南农业大学 | A method of irradiation pretreatment agricultural crop straw Biogas |
| CN111849504A (en) * | 2020-08-06 | 2020-10-30 | 天津科技大学 | Preparation method of biological activated vinegar residue biochar, product and application thereof |
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| CN107552001A (en) * | 2017-09-26 | 2018-01-09 | 四川农业大学 | A kind of preparation and application for being used for the new bio charcoal of hexavalent chromium removal in water body |
| CN109182391A (en) * | 2018-10-15 | 2019-01-11 | 湖南农业大学 | A method of irradiation pretreatment agricultural crop straw Biogas |
| CN111849504A (en) * | 2020-08-06 | 2020-10-30 | 天津科技大学 | Preparation method of biological activated vinegar residue biochar, product and application thereof |
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