CN109295112A - A kind of diphasic anaerobic processing method digested altogether based on yeast fermented stalk producing and ethanol coupling kitchen garbage - Google Patents
A kind of diphasic anaerobic processing method digested altogether based on yeast fermented stalk producing and ethanol coupling kitchen garbage Download PDFInfo
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- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
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- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
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- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/12—Means for regulation, monitoring, measurement or control, e.g. flow regulation of temperature
- C12M41/18—Heat exchange systems, e.g. heat jackets or outer envelopes
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- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/14—Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
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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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- 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
- Y02E50/10—Biofuels, e.g. bio-diesel
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- 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
Abstract
A kind of diphasic anaerobic processing method digested altogether based on yeast fermented stalk producing and ethanol coupling kitchen garbage.Its processing step are as follows: corn stover is cleaned, after drying, carries out mechanical crushing processing, then alkalescence pretreatment is carried out to stalk powder with NaOH, after cellulase degradation, stalk and enzymolysis liquid enter yeast fermentation phase together；In yeast fermentation phase, under the action of saccharomycete, stalk and enzymolysis liquid generate the volatile fatty acid based on ethyl alcohol.The ethyl alcohol generated in the discharge of yeast fermentation phase containing fermentation, is then mixed into containing the methanogenic phase for introducing a fine variety sludge with kitchen garbage, carries out methane phase.It present invention can be suitably applied to the anaerobism recycling of a variety of organic solid castoffs, high organic solid waste anaerobic fermentation volatile organic acids is overcome easily to accumulate, methane phase low efficiency, the disadvantages such as methane phase content is low are a kind of new and effective methods using organic solid waste.
Description
The present invention relates to the organic solid waste process for reclaiming of environmental area for technical field.
Background technique China is that the maximum country of crop material yield, corn stover are used as a kind of most generation in the world
The stalk of table, in all straw refuses, yield highest is distributed most wide.2010, stalk gross annual output amount rose to about
800000000 t, corn stover annual output rise to 2.16 hundred million t.If 2.16 hundred million t corn stovers are completely converted into the energy, it is converted into standard
Coal will be more than 100,000,000 t.Corn stover main component is cellulose, hemicellulose, lignin.These three substances are closely incorporated in
It is formed together the lignocellulosic of hard and steady.Since China's farm output is big, agricultural stalk yield is big, and it is difficult to degrade at
Live apart more, therefore it is mainly handled, disposal options are accumulation, burning etc..Accumulate the easy appropriation of land of stalk, evil endophytic bacteria, mosquito,
Fly influences environment；Crop straw burning pollutes atmosphere, and causes the waste of resource.
Currently, the quantity of kitchen garbage ranks first in the organic solid castoff of city.Kitchen garbage is mainly derived from food and drink
Manage the food process leftover bits and pieces (food waste) and edible remaining (hogwash), complicated component in resident living, high organic content.
2015, Chinese food kitchen garbage yield reached 95,000,000 tons, 260,000 tons of daily output.In Shanghai, Beijing, Chongqing, wide
Some big and medium-sized cities such as state, the kitchen garbage generated daily are more than 2000 tons.The characteristics of food garbage be content of organics very
Greatly, moisture content is higher, and salt content is higher, and chlorinity is higher, and main constituents substantially have protein, fat, starch and fibre
Element etc. is tieed up, simultaneously containing microelements such as sodium, calcium, potassium, magnesium, iron.Currently, China is also lower to the utilization rate of kitchen garbage.Such as
Fruit cannot deal carefully with kitchen garbage, not only to a kind of waste of affluent resources, but will cause to ecological environment severe
It influences, such as: it gives out a foul smell, grease can enter natural water body, polluted source with precipitation.
Traditional anaerobic processing device is initially designed to sewage sludge digestion, but due to high organic matter and volatility rouge
Fat acid (VFA) accumulation has seriously affected methane phase rate, therefore traditional anaerobism mode is poor to kitchen garbage effect, it is therefore desirable to
Superior technique qualification and biochemical investment, could obtain optimal biogas production.In addition, in order to overcome these challenges, Wo Menshe
The novel pathway of methane production based on inter-species electron transmission (DIET) is counted.
It is novel with feeding type pathway of methane production based on direct inter-species electron transmission (DIET), it is a kind of highly efficient production first
Alkane approach.This novel pathway of methane production, can be effectively relieved the accumulation of volatile organic acids in reactor, but this approach
Specific Geobacter class bacterium is needed, recent research indicate that ethyl alcohol, it is verified that this quasi-microorganism can be enriched with.And it is sharp
It is a kind of cost-effective method with stalk fermentation producing and ethanol.
Summary of the invention is to overcome existing organic solid waste treatment effeciency low, and volatile organic acids easily accumulates in reactor,
And then the problem of inhibiting methane phase, the present invention propose following technical scheme: one kind is based on yeast fermented stalk producing and ethanol coupling meal
The diphasic anaerobic processing method that kitchen rubbish digests altogether, it is characterised in that: the main shaft of blender i-5, which passes through, is equipped with water-bath insulating layer i-
In the upper cover of 7 yeast fermentor 8, the upper lid of yeast fermentor 8 is equipped with pipe iv-3 and exhaust valve i-12；Feed pump i-3's
One end through pipeline i-2 insertion feed tank 1 in and the other end through pipe ii-4 and inlet valve i-6 and 8 upper left-hand phase of yeast fermentor
Connection.One end of water-bath pump 11 through the side above pipe v-18 connection water-bath 25 and the other end through pipe vi-10 and inlet valve i-9
Into water-bath insulating layer i-7 left lower.8 bottom right square tube iii-17 of yeast fermentor is through on blow-off valve i-16 insertion conditioning tank 24
Square side.The main shaft of blender ii-27 passes through in the upper cover of the yeast fermentor 30 equipped with water-bath insulating layer ii-29, the production first
30 upper cover of alkane fermentor is equipped with exhaust pipe xiv-33 and exhaust valve ii-32.Feed pump ii-22 is through pipe x-20 and inlet valve ii-28
It is connected with 30 left side top of methane phase fermentor.The bottom sides of conditioning tank 24 are equipped with the pipe iii- with blow-off valve vii-39
40.Feed pump ii-22 is also through the other side above pipe vii-19 insertion conditioning tank 24 and through pipe ix-23 and feed tank ii-26
It is connected.Water-bath insulating layer i-7 right upper portion is through drain valve i-14, pipe xii-21 and inlet valve ii-31 and water-bath insulating layer ii-
The connection of 29 lower lefts.The drainpipe xii-35 of top is through on drain valve ii-34 connection water-bath 25 on the right side of water-bath insulating layer ii-29
The other side of side.8 middle part right side of yeast fermentor is equipped with blow-off valve ii-15.The right side central of methane phase fermentor 30 is equipped with
Blow-off valve v-36 and lower part are equipped with the drainage line xi-38 with blow-off valve iv-37 and connect with sludge-tank i-41.
It is a kind of to generate ethyl alcohol coupling kitchen garbage using yeast fermentation using the above-mentioned formula anaerobic reaction device that is thoroughly mixed
Method, it is characterised in that including following processes:
1) stalk is cleaned into drying, then after being crushed with mechanical crusher, so that stalk is become 2~5mm powdered, it is optimal to be
3mm carries out 22~26h of alkali process to the technical grade NaOH of stalk purity >=95%, and optimal value is that for 24 hours, mass ratio is straw
Stalk: sodium hydroxide: water=35:1:500.
2) it after having handled, with the dense HCl solution of the technical grade of purity >=95%, is mixed with water with ratio 1:4~1:6, most
The figure of merit is 1:5, adjusts the pH of alkaline processing liquid, until pH=4.7~4.9, optimal value 4.8.
3) enzyme activity >=400u/mg technical grade cellulase is added to digest stalk and its basic hydrolysis liquid, dosage
For 0.8~1.2g/L, optimal value 1.0g/L, enzymatic hydrolysis is handled for 24 hours in 36~38 DEG C, the shaking table of 115~125rpm, optimal item
Part is 37 DEG C, 120rmp, and the stalk and enzymolysis liquid after enzymatic hydrolysis enter charging of the feed tank i-1 as yeast fermentor 8.
4) kitchen garbage is collected using school lunch service, contains 50~60% or so staple food, 15~20% vegetable, grease
Content 5~10% carries out comminution pretreatment to kitchen garbage with wall-breaking machine, save, after processing kitchen garbage solid content be 16~
18%, optimal value 16%, kitchen garbage enters feed tank ii-26 after processing.
5) inoculation yeast volatile solid content (VSS) reaches 6~9g/L, and the optimal yeast juice for 8g/L is sent out as yeast
Ferment phase 8 introduces a fine variety microorganism, wherein control yeast fermentation phase pH is 4.0~4.5, optimal value 4.2.
6) methane phase fermentor 30 is using sludge fermentation liquid as the source for introducing a fine variety microorganism, wherein sludge VSS be 20~
30g/L, it is optimal be 25g/L control methanogenic phase pH be 7.0~7.5, optimal value 7.0 guarantees the efficiency of methane phase.
7) yeast fermentor 8 and methane phase fermentor 30 are carried out by waters insulating layer i-7 and waters insulating layer ii-28 respectively
37 DEG C of water-bath heat preservations.
8) certain solid retention time (SRT) is set, yeast fermentor 8 controls SRT=5~10 day, and optimal is 7 days,
Methane phase fermentor 30 controls SRT=10~20 day, and optimal is 15 days.
9) inlet valve i-6 is opened, according to the SRT of yeast fermentation phase, the stalk mixed fermentation liquid in feed tank i-1 passes through pipe
I-2 enters feed pump i-3, then enters yeast fermentor 8 through inlet valve i-6 and pipe ii-4 conveying stalk and enzymolysis liquid.
10) inlet valve i-6 is closed, blow-off valve i-16 is opened, is arranged from the blow-off valve i-16 of yeast fermentor 8 through pipe iii-17
Tunning out, into conditioning tank 24, blow-off valve ii-15 is as spare discharge gate.
11) make the yeast and stalk and its enzyme in yeast fermentor 8 by control 8 top blender i-5 of yeast fermentor
Solution liquid is sufficiently mixed, and is controlled using relay blender i-5, operation stirring per hour 10~15 minutes, and optimal value is
15 minutes, the revolving speed of blender ii-5 was set as 40~60rpm, optimal value 50rpm.
12) tunning in conditioning tank 24, stalk residue and fermentation liquid are separated, fermentation liquid through pipe vii-19 enter into
Material pump ii-22, treated, and kitchen garbage enters feed pump ii-22 through pipe x-23 in feed tank ii-26.
13) after stalk residue is by blow-off valve iii-40 and pipe vii-39 discharge, it can be used for burning disposal.
14) inlet valve ii-28 is opened, according to methanogenic phase SRT, feed pump ii-22 is through pipe ix-20 and inlet valve ii-28
Kitchen garbage yeast stalk fermentation liquid (3:1 by volume) is delivered into methane phase fermentor 30.
15) inlet valve ii-28 is closed, blow-off valve iv-37 is opened, passes through from the blow-off valve iv-37 of methane phase fermentor 30
The fermentation material of certain volume is discharged in pipe x-38, and into sludge-tank i-41, this is final tunning, and solid content substantially reduces,
After dehydration, burning processing can be made, blow-off valve v-36 is as spare discharge gate.
16) send out sludge and stalk in methane phase fermentor 30 by controlling 30 top blender ii-27 of methane phase tank
Zymotic fluid and kitchen garbage are sufficiently mixed, and are controlled using relay blender ii-27,10~15 points of operation stirring per hour
Clock, optimal value are 15 minutes, and the revolving speed of blender ii-27 is set as 40~60rpm, optimal value 50rpm.
17) exhaust valve i-12 is opened, yeast-alcohol fermentor 8 produces gas and passes through pipe iv-13 and exhaust valve i-12 discharge and quilt
It collects.
18) exhaust valve ii-32 is opened, the biogas that methane phase fermentor 30 generates passes through pipe xiv-33 and exhaust valve ii-32
It is discharged and is collected, by methane purification industry, can be used as clean energy resource and burn.
This diphasic anaerobic technique digested altogether based on yeast fermented stalk coupling kitchen garbage is had the special feature that: corn
Stalk is mechanically pulverized and oxygenation pretreatment, can effectively reduce the content that the lignin of anaerobic degradation is difficult in stalk, reduces suppression
The substance of methane phase processed can make the raising of the content of soluble reducing sugars in hydrolyzate using the hydrolysis of cellulase,
It is most of under the action of saccharomycete to be converted to ethyl alcohol.Ethyl alcohol is it is verified that can be in anaerobic processes moderate stimulation micropopulation
It falls and changes, be effectively enriched with ground bacillus, establish the methane phase syntrophism based on direct inter-species electron transmission (DIET) and be metabolized mould
Formula maintains efficient anaerobism to digest altogether.Therefore the stalk fermentation product based on ethyl alcohol, it can be also enriched in methanogenic phase this kind of micro-
Biology reinforces electron transmission efficiency.Therefore, the technique in preceding phase in methanogenic phase by, using yeast fermentation producing and ethanol, constructing
Based on the novel pathway of methane production of direct inter-species electron transmission, it can be effectively relieved to generate in kitchen garbage hydrolytic process and largely wave
The accumulation of hair property organic acid has been completed at the same time the minimizing recycling of kitchen garbage to improve the methane phase efficiency of system.
The technological investment cost is few, and yeast is directed to saccharomyces cerevisiae, and cheap, technological operation is simple, and methane phase effect improves
Obviously, and its methane content of bilogas than common anaerobic digestion process improves 10%~20%, and methane content is reachable
60% or more.It present invention can be suitably applied to the organic solid waste recycling treatment of some high content of organics in rural urbanization, technique
It is required that simple, methane production can be effectively improved.
Detailed description of the invention
Fig. 1, which is that the present invention is a kind of, couples the diphasic anaerobic processing that kitchen garbage digests altogether based on yeast fermented stalk producing and ethanol
Method and workflow schematic diagram.
Wherein: 1, feed tank i, 2, pipe i, 3, feed pump i, 4, pipe ii, 5, mechanical agitator i, 6, inlet valve i, 7, water-bath
Insulating layer i, 8, yeast fermentor, 9, inlet valve i, 10, pipe vi, 11, water-bath pump, 12, exhaust valve i, 13, pipe iv, 14, drain valve
I, 15, blow-off valve ii, 16, blow-off valve i, 17, pipe iii, 18, pipe v, 19, pipe vii, 20, pipe ix, 21, pipe xi, 22, feed pump
Ii, 23, pipe x, 24, conditioning tank, 25, water-bath, 26, feed tank ii, 27, mechanical agitator ii, 28, inlet valve ii, 29, water-bath
Insulating layer ii, 30, methane phase fermentor, 31, inlet valve ii, 32, exhaust valve ii, 33, pipe xiv, 34, drain valve ii, 35, pipe
Xii, 36, blow-off valve v, 37, blow-off valve iv, 38, pipe xv, 39, blow-off valve vii, 40, pipe iii, 41, sludge-tank i.
This diphasic anaerobic digested altogether based on yeast fermented stalk producing and ethanol coupling kitchen garbage of specific embodiment
Method application mechanism is:
1, yeast fermentation producing and ethanol is a kind of quite mature technology, is industrially usually used to distillation producing and ethanol, but right
In the rural urbanization that some conditions are not achieved, lack mature industrial system, it cannot be as industrial for the utilization of stalk
Produce ethyl alcohol.With method of the invention, can local use stalk, reduce the freight of stalk, generate ethyl alcohol and directly use
In mixing kitchen garbage fermentation methane phase, the biogas that can directly utilize can be obtained.
2, kitchen garbage content of organics is very big, and moisture content is higher, and salt content is higher, and chlorinity is higher, mainly group
Substantially there are protein, fat, starch and cellulose etc. at ingredient, simultaneously containing microelements such as sodium, calcium, potassium, magnesium, iron.Due to
The characteristics of high polysaccharide protein that kitchen garbage has, determines that its hydrolytic process often has a large amount of volatile organic acids
Accumulation reduces traditional anaerobic reactor pH, and then the activity of methanogen is affected, methane production degradation, even
Cause the collapse of reactor.And under the direct inter-species electron transport route of ethyl alcohol stimulation building, the consumption of organic acid is accelerated, benefit
In reactor methane phase.
3, above two technical solution is applied to corn stover mixing kitchen garbage anaerobism simultaneously and is total to digestion process.First adopt
The fermentation liquid based on ethyl alcohol is obtained with yeast fermented maize stalk, then the fermentation liquid is mixed into common fermentation with kitchen garbage, no
The accumulation of volatile organic acids can only be alleviated, be enriched with ground bacillus, construct direct inter-species electron transfer process, anaerobism is improved and disappear altogether
Change efficiency and methane phase efficiency, moreover it is possible to it realizes the minimizing of stalk and kitchen garbage, reduces the foul smell sewage that kitchen garbage generates,
Favorable influence is generated to ecological environment.
Now in conjunction with drawings and examples, the present invention will be further described.As shown in Figure 1, this primary yeast fermented stalk produces second
The diphasic anaerobic method that alcohol couples kitchen garbage has following technical characteristic: the main shaft of blender i-5, which passes through, is equipped with water-bath heat preservation
In the upper cover of the yeast fermentor 8 of layer i-7, the upper lid of yeast fermentor 8 is equipped with pipe iv-13 and exhaust valve i-12.Feed pump
One end of i-3 is inserted into feed tank 1 through pipeline i-2 and the other end is left through pipe ii-4 and inlet valve i-6 and 8 top of yeast fermentor
Side is connected.Side of the one end of water-bath pump 11 through the top of pipe v-18 connection water-bath 25 and the other end through pipe vi-10 with intake
Valve i-9 enters water-bath insulating layer i-7 left lower.8 bottom right square tube iii-17 of yeast fermentor is inserted into through blow-off valve i-16 and adjusts
24 upper side of pond.The main shaft of blender ii-27 passes through in the upper cover of the yeast fermentor 30 equipped with water-bath insulating layer ii-29,
30 upper cover of methane phase fermentor is equipped with exhaust pipe xiv-33 and exhaust valve ii-32.Feed pump ii-22 is through pipe x-20 and inlet valve
Ii-28 is connected with 30 left side top of methane phase fermentor.The bottom sides of conditioning tank 24 are equipped with the pipe with blow-off valve vii-39
iii-40.Feed pump ii-22 is also through the other side above pipe vii-19 insertion conditioning tank 24 and through pipe ix-23 and feed tank
Ii-26 is connected.Water-bath insulating layer i-7 right upper portion is kept the temperature through drain valve i-14, pipe xii-21 and inlet valve ii-31 and water-bath
The connection of the layer lower left ii-29.The drainpipe xii-35 of top is through drain valve ii-34 connection water-bath on the right side of water-bath insulating layer ii-29
The other side of 25 top of pot.8 middle part right side of yeast fermentor is equipped with blow-off valve ii-15.In the right side of methane phase fermentor 30
Portion is equipped with blow-off valve v-36 and lower part is equipped with the drainage line xi-38 with blow-off valve iv-37 and connect with sludge-tank i-41.
It is a kind of to generate ethyl alcohol coupling kitchen garbage using yeast fermentation using the above-mentioned formula anaerobic reaction device that is thoroughly mixed
Method, it is characterised in that including following processes:
Stalk is cleaned into drying, then after being crushed with mechanical crusher, becoming stalk, 2~5mm is powdered, and optimal is 3mm,
To the technical grade NaOH of stalk purity >=95%, 22~26h of alkali process is carried out, optimal value is that for 24 hours, mass ratio is stalk:
Sodium hydroxide: water=35:1:500.
After having handled, with the dense HCl solution of the technical grade of purity >=95%, mixed with water with ratio 1:4~1:6, it is optimal
For 1:5, the pH of alkaline processing liquid is adjusted, until pH=4.7~4.9, optimal value 4.8.
Enzyme activity >=400u/mg technical grade cellulase is added to digest stalk and its basic hydrolysis liquid, dosage is
0.8~1.2g/L, optimal value 1.0g/L, enzymatic hydrolysis are handled for 24 hours in 36~38 DEG C, the shaking table of 115~125rpm, optimal conditions
It is 37 DEG C, 120rmp, the stalk and enzymolysis liquid after enzymatic hydrolysis enter charging of the feed tank i-1 as yeast fermentor 8.
Kitchen garbage is collected using school lunch service, containing 50~60% or so staple food, 15~20% vegetable, grease contains
Amount 5~10%, carries out comminution pretreatment to kitchen garbage with wall-breaking machine, saves, after processing kitchen garbage solid content for 16~
18%, optimal value 16%, kitchen garbage enters feed tank ii-26 after processing.
Inoculation yeast volatile solid content (VSS) reaches 6~9g/L, and the optimal yeast juice for 8g/L ferments as yeast
Phase 8 introduces a fine variety microorganism, wherein control yeast fermentation phase pH is 4.0~4.5, optimal value 4.2.
Methane phase fermentor 30 is using sludge fermentation liquid as the source for introducing a fine variety microorganism, and wherein sludge VSS is 20~30g/
L, it is optimal be 25g/L control methanogenic phase pH be 7.0~7.5, optimal value 7.0 guarantees the efficiency of methane phase.
Yeast fermentor 8 and methane phase fermentor 30 carry out 37 by waters insulating layer i-7 and waters insulating layer ii-28 respectively
DEG C water-bath heat preservation.
It is arranged certain solid retention time (SRT), yeast fermentor 8 controls SRT=5~10 day, and optimal is 7 days, produces
Methane fermentation tank 30 controls SRT=10~20 day, and optimal is 15 days.
Inlet valve i-6 is opened, according to the SRT of yeast fermentation phase, the stalk mixed fermentation liquid in feed tank i-1 passes through pipe i-
2 enter feed pump i-3, then enter yeast fermentor 8 through inlet valve i-6 and pipe ii-4 conveying stalk and enzymolysis liquid.
Inlet valve i-6 is closed, blow-off valve i-16 is opened, is discharged from the blow-off valve i-16 of yeast fermentor 8 through pipe iii-17
Tunning, into conditioning tank 24, blow-off valve ii-15 is as spare discharge gate.
Make the yeast and stalk and its enzymolysis liquid in yeast fermentor 8 by control 8 top blender i-5 of yeast fermentor
It is sufficiently mixed, blender i-5 is controlled using relay, operation stirring per hour 10~15 minutes, optimal value is 15 points
Clock, the revolving speed of blender ii-5 are set as 40~60rpm, optimal value 50rpm.
Tunning in conditioning tank 24, stalk residue and fermentation liquid are separated, and fermentation liquid enters charging through pipe vii-19
Ii-22 is pumped, treated, and kitchen garbage enters feed pump ii-22 through pipe x-23 in feed tank ii-26.
After stalk residue is by blow-off valve iii-40 and pipe vii-39 discharge, it can be used for burning disposal.
Inlet valve ii-28 is opened, according to methanogenic phase SRT, feed pump ii-22 will eat through pipe ix-20 and inlet valve ii-28
Kitchen rubbish yeast stalk fermentation liquid (1:1 by volume) delivers into methane phase fermentor 30.
Inlet valve ii-28 is closed, blow-off valve iv-37 is opened, passes through pipe x- from the blow-off valve iv-37 of methane phase fermentor 30
The fermentation material of 38 discharge certain volumes, into sludge-tank i-41, this is final tunning, and solid content substantially reduces, and is dehydrated
Afterwards, burning processing can be made, blow-off valve v-36 is as spare discharge gate.
Make the sludge and stalk fermentation liquid in methane phase fermentor 30 by control 30 top blender ii-27 of methane phase tank
It is sufficiently mixed with kitchen garbage, blender ii-27 is controlled using relay, operation stirring per hour 10~15 minutes,
Optimal value is 15 minutes, and the revolving speed of blender ii-27 is set as 40~60rpm, optimal value 50rpm.
Exhaust valve i-12 is opened, yeast-alcohol fermentor 8 produces gas and is discharged and is collected by pipe iv-13 and exhaust valve i-12
Get up.
Exhaust valve ii-32 is opened, the biogas that methane phase fermentor 30 generates is discharged by pipe xiv-33 and exhaust valve ii-32
And be collected, by methane purification industry, it can be used as clean energy resource and burn.
Embodiment 1:
Use pulverizer by corn stover mechanical cutoff at diameter for the sheet corn stover of 2-5mm, then with ball mill will
The sheet corn stover is polished into the graininess corn stover that diameter is 2mm.Industry to stalk powder purity >=95%
Grade NaOH carries out basic treatment, and be stalk according to mass ratio: sodium hydroxide: water=35:1:500 is handled, and corn stalk is obtained
Stalk mixed liquor is placed on 37 DEG C of environment later, handles for 24 hours in 120rpm constant-temperature table, later again using purity >=95%
The dense HCI solution of technical grade is that 1:5 is mixed with water in proportion, prepares dilute HCI solution, and prepared dilute HCl solution is added
Corn stover mixed liquor is stated, its pH to 4.8 is adjusted.Enzyme activity >=400u/mg technical grade is added in the mixed liquor for regulating pH
Cellulase, dosage 0.8-1.5g/L, optimal is 1.0g/L, is digested to stalk and its basic hydrolysis liquid, is digested in 36-
38 DEG C, optimal is 37 DEG C, is handled in the constant-temperature table of 120rpm for 24 hours, stalk and enzymolysis liquid after enzymatic hydrolysis enter feed tank i work
For the charging of yeast fermentation phase.Kitchen garbage is collected, 50~60% or so staple food, 15~20% or so vegetable, oil are contained
Rouge content 5~10% carries out comminution pretreatment to kitchen garbage with wall-breaking machine, saves, kitchen garbage solid content is about after processing
16%, kitchen garbage enters feed tank ii after processing.Dischargeable capacity is used to be thoroughly mixed formula anaeroic digestor conduct for 1.0L
Yeast fermentor, inoculation yeast 1000mL, yeast VSS are 10g/L.Dischargeable capacity is used to disappear for the formula anaerobism that is thoroughly mixed of 4.0L
Change device as methane phase fermentor, is inoculated with anaerobic sludge 4000mL, sludge concentration 30g/L.The solid retention of yeast fermentor
Time control is 10d, and pH control is 4.8, and temperature control is 37 DEG C, mixing speed 50rpm, and mixing time control is per hour
Stirring 15 minutes.The solid retention time control of methane phase fermentor is 20d, and pH control is 7.0, and temperature control is 37 DEG C, is stirred
Mixing speed is 50rpm, and mixing time control is stirring 15 minutes per hour.Yeast fermentor passes through feed pump i from charging daily
100ml is once fed in the i of pond, 100ml stalk fermentation liquid is once discharged by blow-off valve and enters conditioning tank.Stalk in conditioning tank
Kitchen garbage in fermentation liquid and feed tank ii feeds 200ml by feed pump ii according to volume ratio 1:1 and enters methane phase fermentation
Tank, wherein yeast fermentor ethanol production accounts for the 15% of charging.Methane phase rate reaches 420mL/g VSS* in sludge fermentation tank
D, year-on-year conventional anaerobic are total to slaking apparatus and improve 20%.
Claims (2)
1. a kind of diphasic anaerobic processing method digested altogether based on yeast fermented stalk producing and ethanol coupling kitchen garbage, feature are existed
In: the main shaft of blender i (5) passes through in the upper cover of the yeast fermentor (8) equipped with water-bath insulating layer i (7), the yeast fermentation
The upper lid of tank (8) is equipped with pipe iv (13) and exhaust valve i (12)；Feed tank is inserted into through pipeline i (2) in one end of feed pump i (3)
(1) in and the other end is connected through pipe ii (4) and inlet valve i (6) with yeast fermentor (8) upper left-hand；Water-bath pumps (11)
One end through the side above pipe v (18) connection water-bath (25) and the other end through pipe vi (10) and inlet valve i (9) enters water-bath guarantor
Warm layer i (7) left lower；Yeast fermentor (8) the bottom right square tube iii (17) is inserted into conditioning tank (24) through blow-off valve i (16)
Upper side；The main shaft of blender ii (27) passes through in the upper cover of the yeast fermentor (30) equipped with water-bath insulating layer ii (29),
Methane phase fermentor (30) upper cover is equipped with exhaust pipe xiv (33) and exhaust valve ii (32)；Feed pump ii (22) through pipe x (20) and
Inlet valve ii (28) is connected with top on the left of the methane phase fermentor (30)；The bottom sides of the conditioning tank (24) are equipped with
Pipe iii (40) with blow-off valve vii (39)；The feed pump ii (22) is also inserted on the conditioning tank (24) through pipe vii (19)
Side the other side and be connected through pipe ix (23) with feed tank ii (26)；Water-bath insulating layer i (7) right upper portion is through draining
Valve i (14), pipe xii (21) and inlet valve ii (31) are connect with water-bath insulating layer ii (29) lower left；The water-bath insulating layer
The drainpipe xii (35) of top connects the other side above the water-bath (25) through drain valve ii (34) on the right side of ii (29)；Institute
It states right side in the middle part of yeast fermentor (8) and is equipped with blow-off valve ii (15)；The right side central of the methane phase fermentor (30) is equipped with
Blow-off valve v (36) and lower part are equipped with the drainage line xi (38) with blow-off valve iv (37) and connect with sludge-tank i (41).
2. a kind of generate ethyl alcohol coupling kitchen garbage using yeast fermentation using the above-mentioned formula anaerobic reaction device that is thoroughly mixed
Method, it is characterised in that including following processes:
1) stalk is cleaned into drying, then after being crushed with mechanical crusher, becoming stalk, 2~5mm is powdered, and optimal is 3mm, right
The technical grade NaOH of stalk purity >=95% carries out 22~26h of alkali process, optimal for for 24 hours, mass ratio is stalk: hydrogen-oxygen
Change sodium: water=35:1:500；
2) it after having handled, with the dense HCl solution of the technical grade of purity >=95%, is mixed with water with ratio 1:4~1:6, it is optimal to be
1:5 adjusts the pH of alkaline processing liquid, until pH=4.7~4.9, optimal value 4.8；
3) enzyme activity >=400u/mg technical grade cellulase is added to digest stalk and its basic hydrolysis liquid, dosage 0.8
~1.2g/L, optimal is 1.0g/L, and enzymatic hydrolysis is handled for 24 hours in 36~38 DEG C, the shaking table of 115~125rpm, optimal conditions 37
DEG C, 120rpm, stalk and enzymolysis liquid after enzymatic hydrolysis enter charging of the feed tank i (1) as yeast fermentor (8)；
4) kitchen garbage is collected using school lunch service, contains 50~60% or so staple food, 15~20% vegetable, fat content
5~10%, comminution pretreatment is carried out to kitchen garbage with wall-breaking machine, is saved, kitchen garbage solid content is 16~18% after processing,
Optimal value is 16%, and kitchen garbage enters feed tank ii (26) after processing；
5) inoculation yeast volatile solid content (VSS) reaches 6~9g/L, and the optimal yeast juice for 8g/L is as yeast fermentation phase
(8) introduce a fine variety microorganism, wherein control yeast fermentation phase pH be 4.0~4.5, optimal value 4.2；
6) methane phase fermentor (30) is using sludge fermentation liquid as the source for introducing a fine variety microorganism, and wherein sludge VSS is 20~30g/
L, it is optimal be 25g/L control methanogenic phase pH be 7.0~7.5, optimal is 7.3, guarantees the efficiency of methane phase；
7) yeast fermentor (8) and methane phase fermentor (30) respectively by waters insulating layer i (7) and waters insulating layer ii (28) into
37 DEG C of water-bath heat preservations of row；
8) certain solid retention time (SRT) is set, and yeast fermentor (8) controls SRT=5~10 day, and optimal is 7 days, produces
Methane fermentation tank (30) controls SRT=10~20 day, and optimal is 15 days；
9) inlet valve i (6) are opened, according to the SRT of yeast fermentation phase, the stalk mixed fermentation liquid in feed tank i (1) passes through pipe i
(2) enter feed pump i (3), then enter yeast fermentor (8) through inlet valve i (6) and pipe ii (4) conveying stalk and enzymolysis liquid；
10) inlet valve i (6) are closed, opened blow-off valve i (16), from the blow-off valve i (16) of yeast fermentor (8) through pipe iii (17)
Tunning is discharged, into conditioning tank (24), blow-off valve ii (15) is used as spare discharge gate；
11) make the yeast and stalk and its enzyme in yeast fermentor (8) by blender i (5) above control yeast fermentor (8)
Solution liquid is sufficiently mixed, and is controlled using relay blender i (5), operation stirring per hour 10~15 minutes, and optimal value is
15 minutes, blender i (5) revolving speed was set as 40~60rpm, optimal value 50rpm；
12) tunning in conditioning tank (24), stalk residue and fermentation liquid are separated, fermentation liquid through pipe vii (19) enter into
Material pump ii (22), treated, and kitchen garbage enters feed pump ii (22) through pipe x (23) in feed tank ii (26)；
13) after stalk residue is by blow-off valve iii (40) and pipe vii (39) discharge, it can be used for burning disposal；
14) inlet valve ii (28) are opened, according to methanogenic phase SRT, feed pump ii (22) is through pipe ix (20) and inlet valve ii (28)
Kitchen garbage yeast stalk fermentation liquid (3:1 by volume) is delivered into methane phase fermentor (30)；
15) inlet valve ii (28) are closed, opens blow-off valve iv (37), passes through from the blow-off valve iv (37) of methane phase fermentor (30)
The fermentation material of certain volume is discharged in pipe x (38), and into sludge-tank i (41), this is final tunning, and solid content drops significantly
It is low, after dehydration, burning processing can be made, blow-off valve v (36) is used as spare discharge gate；
16) send out sludge and stalk in methane phase fermentor (30) by blender ii (27) above control methane phase tank (30)
Zymotic fluid and kitchen garbage are sufficiently mixed, and are controlled using relay blender ii (27), operation stirring per hour 10~15
Minute, optimal value is 15 minutes, and the revolving speed of blender ii (27) is set as 40~60rpm, optimal value 50rpm；
17) exhaust valve i (12) are opened, yeast-alcohol fermentor (8) produces gas and passes through pipe iv (13) and exhaust valve i (12) discharge and quilt
It collects；
18) exhaust valve ii (32) are opened, the biogas that methane phase fermentor (30) generates passes through pipe xiv (33) and exhaust valve ii (32)
It is discharged and is collected, by methane purification industry, can be used as clean energy resource and burn.
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| CN110257437A (en) * | 2019-07-01 | 2019-09-20 | 北京工商大学 | A kind of kitchen garbage dry-type anaerobic fermentation quick start and stable operation method |
| CN110818214A (en) * | 2019-11-11 | 2020-02-21 | 大连理工大学 | High solid kitchen garbage of content and city excess sludge co-fermentation device are reinforceed to charcoal |
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