CN109161564A - A kind of matrix liner and its preparation method and application for organic waste anaerobic dry fermentation - Google Patents
A kind of matrix liner and its preparation method and application for organic waste anaerobic dry fermentation Download PDFInfo
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- CN109161564A CN109161564A CN201811019848.3A CN201811019848A CN109161564A CN 109161564 A CN109161564 A CN 109161564A CN 201811019848 A CN201811019848 A CN 201811019848A CN 109161564 A CN109161564 A CN 109161564A
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- 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
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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
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Abstract
The matrix liner and its preparation method and application that the invention discloses a kind of for organic waste anaerobic dry fermentation.Matrix liner of the invention is prepared by the fixed iron-based compounded mix of non-woven geotextile package needle point method.Wherein, iron-based compounded mix is compounded by the mixing of the zeolite powder of the zeroth order iron powder of mass fraction 60%-65%, the straw of mass fraction 25%-30% or bamboo powder and mass fraction 5%-15%.By the present invention in that with above-mentioned matrix liner, it overcomes traditional organic waste anaerobic dry fermentation process Zero-valent Iron and mixes many drawbacks added, it is highly reliable using simple, the methane phase efficiency for effectively improving anaerobic system, peomotes the development of organic waste energy.
Description
Technical field
The present invention relates to organic garbage treatments and resource technology field, specifically a kind of to be used for organic waste anaerobism
Matrix liner of dry fermentation and its preparation method and application.
Background technique
Categorized consumer waste collection is the only stage which must be passed by of China's sustainable society development.Anaerobic fermentation technology is categorised collection
Organic waste (including food waste and fruits and vegetables waste) " recycling " processing afterwards provides feasible Technology Ways.It is sent out in various anaerobism
In ferment mode, anaerobic dry fermentation due to the advantages that its volumetric gas production rate is big, biogas slurry yield is few, low energy consumption, stable, by
Step becomes the major fields studied and practiced both at home and abroad.
Perishable moiety content is higher in China's house refuse, easily occurs during anaerobic dry fermentation serious peracid
Phenomenon, so that the production gas to system causes significant inhibiting effect.To solve the above problems, generally taken in engineering reduce into
Material reduces load, additional lye or increases the means such as sludge reflux (inoculation) to inhibit the appearance of acid accumulation phenomenon.But
Aforesaid operations not only influence the stability of process operation, but also increase the difficulty of subsequent biogas slurry, biogas residue processing, actual effect
It is unsatisfactory.
By adding outer plus object in anaerobic fermentation process, anaerobic system micro-loop is adjusted by the related characteristic of additional object
Border, enhancement microbiological metabolic capability, becoming improves one of the important means of high concentration organic garbage anaerobic fermentation.Zero-valent Iron conduct
A kind of cheap, environmental-friendly reducing agent, in recent years using relatively wide in above-mentioned field.Wherein, the mechanism of action of Zero-valent Iron, it is main
It include: to neutralize peracid system, establish reducing atmosphere, reduce oxidation-reduction potential, reinforced anaerobic microorganism and enzymatic activity, mention
For matrix yield (hydrogen and organic acid) needed for microelement and supplied for electronic, increase methane phase, the generation of inhibition sulfate reducing bacteria
It thanks.Currently, in organic waste anaerobic dry fermentation, based on traditional Zero-valent Iron usage mode is still added with mixing, the party
Though formula can achieve the desired results, for engineering viewpoint, mixing adds needs and adds mixing equipment before charging for zeroth order
Iron mixes completely with fermentation substrate, and it is more serious on the one hand to generate abrasion to equipment；On the other hand, it after anaerobic fermentation, remains
Remaining Zero-valent Iron would become hard to separate from biogas residue, the not only lower service efficiency of material, but also increase the subsequent place of fermentation residue
The difficulty set.
To sum up, although research of the Zero-valent Iron in terms of strengthening anaerobic fermentation of organisms is increasingly mature, in practical work
The obvious lag of application in journey, people are still in the usage mode for seeking a kind of easy to operate, effective Zero-valent Iron.Into one
Step says that the exploitation and practice of related process are for promoting China's categorized consumer waste to collect the development with organic resources industry
It is of great practical significance.
Summary of the invention
The first object of the present invention is to provide a kind of matrix liner and its preparation for organic waste anaerobic dry fermentation
Method.
The second object of the present invention is to provide above-mentioned matrix liner in the application side of organic waste anaerobic dry fermentation process
Method, to realize the target that organic matter accelerated degradation and methane phase efficiency improve.
In order to realize above-mentioned purpose of the invention, the invention adopts the following technical scheme:
The present invention provides a kind of matrix liner for organic waste anaerobic dry fermentation, and the matrix liner includes: bottom
Non-woven geotextile, the iron-based compounded mix of middle layer and the non-woven geotextile on surface layer；The middle layer it is iron-based compound
Filler is fixed between the non-woven geotextile of bottom and the non-woven geotextile on surface layer by needle point method.
Preferably, the non-woven geotextile mass area ratio is not less than 200g/m2；The non-woven soil of the bottom
Work cloth with a thickness of 1.7-5.0mm, the non-woven geotextile on the surface layer with a thickness of 1.7-5.0mm；Described is iron-based compound
The every square meter of the usage amount of filler is not less than 5.3kg.
Preferably, the iron-based compounded mix is formed by the component of following mass percent:
Zeroth order iron powder 60.0%-65.0%；
Straw or bamboo powder 25.0%-30.0%；
Zeolite powder 5.0%-15.0%.
Optimal, the iron-based compounded mix is formed by the component of following mass percent:
Zeroth order iron powder 65.0%；
Straw or bamboo powder 25.0%；
Zeolite powder 10.0%.
The raw material of the zeroth order iron powder is one or more of fe, waste iron filing, reproducibility iron powder；The zeroth order iron powder
Granularity be 80-200 mesh.
Preferably, the straw or the raw material of bamboo powder are from agricultural wastes or garden waste；It is described
Straw or bamboo powder are the powder that partial size is 0.074-0.613mm after natural air drying, crushing.
Preferably, the raw material of the zeolite powder is natural zeolite or artificial zeolite, and granularity is 80-200 mesh.
The present invention also provides the preparation methods of the matrix liner for organic waste anaerobic dry fermentation described in one kind, including
Following steps:
(1) raw material preparation: the iron-based raw material grinding and sieving that will acquire obtains zeroth order iron powder, spare；The stalk that will acquire
Or bamboo and wood raw material crushes after natural air drying, it is spare；The zeolite materials grinding and sieving that will acquire obtains zeolite powder, spare；
(2) by the mass percent that step (1) obtains be 60.0%-65.0% zeroth order iron powder, mass percent be
After the straw or bamboo powder of 25.0%-30.0%, the zeolite powder that mass percent is 5.0%-15.0% are sufficiently mixed, obtain
It is spare to iron-based compounded mix；
(3) the uniform spreading of iron-based compounded mix for obtaining step (2) is formed iron-based on the non-woven geotextile
Compounded mix layer, then tile one layer of non-woven geotextile on it again；
(4) the iron-based compounded mix is fixed between two layers of non-woven geotextile using needle point method, system
At the Packing seat.
Preferably, the zeroth order iron particle size after the sieving is 80-200 mesh；The straw or bamboo powder are to pass through
Partial size is the powder of 0.074-0.613mm after crushing；Zeolite powder granularity after the sieving is 80-200 mesh.
A kind of application of the matrix liner for organic waste anaerobic dry fermentation, in organic waste anaerobic dry fermentation
In the process, the matrix liner and organic waste by way of stratiform cross arrangement from top to bottom according to one layer of matrix liner,
The sequence of one layer of organic waste is laid with to the design heap height of anaerobic reactor, as feed waste solid content and content of organics are higher
When (solid content > 35%wt, content of organics > 85%TS), can suitably overlay liner in junk-heap body bottom and top.
Preferably, every meter of organic waste heap height is laid with no less than 2 layers of matrix liner；Every layer of matrix liner can continuously make
With 3-5 anaerobic fermentation of organisms period, each anaerobic fermentation of organisms period is 30-40 days.
The matrix liner specific mechanism of action when in use provided by the present invention for organic waste anaerobic dry fermentation is:
When the hydrolyzate that organic waste generates under anaerobic environment passes through matrix liner, the expection of compounded mix can be played
Effect.
Compared with prior art, the invention has the following advantages:
1, matrix liner of the present invention is used for organic waste anaerobic dry fermentation, and it is unique also to take full advantage of Zero-valent Iron
Originality strengthens enzymatic activity, adjusts the features such as microbial metabolism approach, is conducive to the methane phase efficiency of raising system.Described fills out
The iron-based compounded mix for expecting the middle layer of liner includes a certain proportion of straw or bamboo powder and zeolite powder, is not more
The simple direct superposition of kind material composition, but following coupling effect can be formed:
1) numerous small primary battery is formed with Zero-valent Iron, accelerates the release and transmitting of electronics；
2) recharge of the rubbish hydrolyzate in cooperation, the porous structure of material itself can capture sufficient microorganism and
Nutriment increases the contact area of the two, is conducive to the raising of microbial metabolic activity；
3) zeolite powder in filler has the function of absorbing ammonia nitrogen in biogas slurry, makees to reduce it to the inhibition of methanogen
With.
2, zeroth order iron material used in the iron-based compounded mix of the middle layer of matrix liner of the invention can be using useless
Iron filings, and straw or bamboo and wood are from agricultural and garden waste, are the resource utilization of waste, it is low in cost.
3, the iron-based compounded mix of the middle layer of matrix liner of the invention is fixed by needle point method and non-woven geotextile, shape
At standardized cushioning product.Used non-woven geotextile plays reverse filter effect simultaneously, it is therefore prevented that particulate matter pair in rubbish
The blocking of packing layer promotes being uniformly distributed for organic waste hydrolyzate.It can be very good to realize filler by the way of liner
With being kept completely separate for fermentation substrate, it is entirely avoided the difficult problem of zeroth order iron powder separation in biogas residue.Single batch organic waste drop
After the completion of solution, matrix liner can reuse after recycling.
4, the method that matrix liner of the invention is used for organic waste anaerobic dry fermentation has and is laid with simply, do not need volume
The characteristics of outer device/facility, construction efficiency is high, highly reliable.
Detailed description of the invention
Fig. 1 is a kind of signal of matrix liner for organic waste dry fermentation of the present invention and its preparation method and application
Figure；
Fig. 2 is that matrix liner strengthens organic waste dry-type anaerobic fermentation methane phase curve in embodiment 1.It can be with from Fig. 2
Find out, in the case where being laid with matrix liner, organic waste anaerobic digestion gas production rate is significantly improved, and produces the shortening of stagnation of the circulation of vital energy later period
75% or more.
Fig. 3 is that matrix liner strengthens organic waste dry-type anaerobic fermentation methane phase curve in embodiment 2.
Fig. 4 is that matrix liner repeatedly recycles use process accumulation methane phase situation in embodiment 1.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment 1:
1, organic waste forms
New refuse of the house refuse used in embodiment from Beijing's landfill yard (concrete composition is shown in Table 1).Through
After manually rejecting the inert substances such as stone, metal, plastics and porcelain therein, remaining food waste, paper, and be not easy to sort
Leaf and other parts are as organic waste used in test.The organic waste is standby through broken (< 120mm) and after evenly mixing
With.
Table 1: house refuse forms (wet basis %) substantially
2, the preparation of test group matrix liner includes the following steps: in the present embodiment
(1) prepare raw material: by fe grinding, obtaining the zeroth order iron powder of 200 mesh, it is spare；The straw warp that will acquire
After natural air drying, crushing, the sieve of 0.125mm is crossed, takes screened part spare；The natural zeolite that will acquire is sieved after crushing, and obtains
The zeolite powder of 200 mesh is obtained, it is spare.
(2) the zeroth order iron powder for being about 62.0% by above-mentioned mass percent, the plant straw that mass percent is about 28.0%
Stalk powder, it is spare after the natural zeolite powder that mass percent is 10.0% is sufficiently mixed.
(3) the uniform spreading of iron-based compounded mix for obtaining step (2) (220g/ on the non-woven geotextile
m2).Later in one layer of non-woven geotextile (220g/m of upper tiling of above-mentioned iron-based compounded mix2).It will be described using needle point method
Iron-based compounded mix is fixed between two layers of non-woven geotextile, is prepared.Wherein, the dosage of iron-based compounded mix
About 5.6kg/m2, entire matrix liner weight is about 6.1kg/m2。
3, organic waste dry-type anaerobic fermentation
Prepare two identical dry type anaerobic reactors (test group and control group), each reactor is quasi- to load 2.5t
Rubbish.Wherein, the packed height of control group organic waste is at 1.5 meters or so.Based on the content of present invention, in test group reactor
Be laid with three layers of matrix liner altogether, position exists respectively: junk-heap body bottom, at the half of junk-heap body and junk-heap body it is upper
Portion.Its specific implementation steps is as follows: matrix liner and organic waste is successively laid with by way of stratiform cross arrangement, from
Under to it is upper successively are as follows: underfilling liner, 75cm thickness organic waste, middle filler liner, 75cm thickness organic waste and top layer are filled out
Material liner.Schematic diagram is as shown in Figure 1.
After the completion of above-mentioned steps, reactor is placed in thermostatic chamber, maintains temperature 37 in entire reactor operational process
±2℃.Seed sludge was added according to the 20% of rubbish total weight (wet basis) to two reactors respectively before anaerobism on-test, together
When adjust rubbish it is aqueous to 65%-75%.The fermentation biogas slurry of generation is used for reactor recharge (1 times/day).The test run period is extremely
Until tolerance is produced daily lower than accumulate gas production 1%.
Based on above-mentioned testing program, the test of organic matter dry-type anaerobic fermentation continues 45 days altogether.Period to the biogas of generation into
Row is collected, and is analyzed its ingredient, as a result as shown in Figure 2.The test group methane phase lag period for being laid with matrix liner is significant
Shorten, methane content of bilogas obviously increases.In the entire test period, it is 714.3L/kg VS that test group, which obtains total gas production,
The case where wherein average content of methane is 59.3%, is higher than control group 457.7L/kg VS.
Embodiment 2:
1, organic waste forms
Configuration is the same as embodiment 1.
2, the preparation of test group matrix liner includes the following steps: in the present embodiment
(1) prepare raw material: by fe grinding, obtaining the zeroth order iron powder of 80 mesh, it is spare；The straw that will acquire is natural
After air-drying, crushing, the sieve of 0.613mm is crossed, takes screened part spare；The natural zeolite that will acquire is sieved after crushing, and obtains 80
Purpose zeolite powder, it is spare.
(2) the zeroth order iron powder for being about 65.0% by above-mentioned mass percent, the plant straw that mass percent is about 30.0%
Stalk, it is spare after the natural zeolite powder that mass percent is 5.0% is sufficiently mixed.
(3) the uniform spreading of iron-based compounded mix for obtaining step (2) (200g/ on the non-woven geotextile
m2).Later in one layer of non-woven geotextile (200g/m of upper tiling of above-mentioned iron-based compounded mix2).It will be described using needle point method
Iron-based compounded mix is fixed between two layers of non-woven geotextile, is prepared.Wherein, the dosage of iron-based compounded mix
About 6.8kg/m2, entire matrix liner weight is about 7.2kg/m2。
3, organic waste dry-type anaerobic fermentation
Operating method is the same as embodiment 1.
Fig. 3 is the effect picture that the embodiment of the present invention 2 produces that gas is strengthened to organic matter anaerobic dry fermentation.From figure 3, it can be seen that logical
Laying matrix liner is crossed, methane content of bilogas increases sharply, and anaerobic fermentation continues 44 days, and acquisition biogas output is 760L/kg
The case where VS, be averaged methane content 58.4%, is significantly higher than control group.And control group organic waste dry-type anaerobic fermentation early period produces
The main reason for raw acid inhibits (percolate pH=5.0-6.3) to be its methane phase inefficiency.
Embodiment 3:
Relative to embodiment 1, will only be reused after the matrix liner being laid with recycling, the preparation of remaining matrix liner and examination
Proved recipe method is consistent with embodiment 1.Every layer of matrix liner completes the organic waste dry-type anaerobic fermentation test in 6 periods altogether,
To verify the reliability of its long-term effect and reuse.
It is as shown in Figure 4 that the test group of measurement produces gas effect.From the 5th use, gas producing efficiency is declined matrix liner,
90% or so when only using for the first time；And the 6th time in use, gas production be only for the first time use when 82% or so.Cause
This, according to the application of matrix liner of the present invention, recommending the access times of every layer of matrix liner is 3-5 fermentation period.
Embodiment 4:
Relative to embodiment 1, only change the source of zeroth order iron powder, and bamboo powder is used to prepare iron-based compound fill out as raw material
Material.Specifically: the raw material of zeroth order iron powder is waste iron filing；And bamboo and wood is from garden waste.Other liner preparation steps and examination
It is same as Example 1 to test condition.
The reinforcing of measurement produces gas effect and anaerobic fermentation cycle time situation with embodiment 1.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of matrix liner for organic waste anaerobic dry fermentation, which is characterized in that the matrix liner includes: bottom
Non-woven geotextile, the iron-based compounded mix of middle layer and the non-woven geotextile on surface layer；The iron-based of the middle layer compound is filled out
Material is fixed between the non-woven geotextile of bottom and the non-woven geotextile on surface layer by needle point method.
2. the matrix liner according to claim 1 for organic waste anaerobic dry fermentation is it is characterized by: described non-knit
Geotextiles mass area ratio is made not less than 200g/m2；The non-woven geotextile of the bottom with a thickness of 1.7-5.0mm, institute
State the non-woven geotextile on surface layer with a thickness of 1.7-5.0mm；The every square meter of usage amount of the iron-based compounded mix is not less than
5.3kg。
3. the matrix liner according to claim 1 for organic waste anaerobic dry fermentation, it is characterised in that: described iron-based
Compounded mix is formed by the component of following mass percent:
Zeroth order iron powder 60.0%-65.0%；
Straw or bamboo powder 25.0%-30.0%；
Zeolite powder 5.0%-15.0%.
4. iron-based compounded mix according to claim 3, it is characterised in that: the raw material of the zeroth order iron powder be fe,
One or more of waste iron filing, reproducibility iron powder；The granularity of the zeroth order iron powder is 80-200 mesh.
5. iron-based compounded mix according to claim 3, it is characterised in that: the straw or the raw material of bamboo powder come
From in agricultural wastes or garden waste；The straw or bamboo powder are that partial size is after natural air drying, crushing
The powder of 0.074-0.613mm.
6. iron-based compounded mix according to claim 3, it is characterised in that: the raw material of the zeolite powder be natural zeolite or
Artificial zeolite；The granularity of the zeolite powder is 80-200 mesh.
7. a kind of preparation method of the matrix liner as claimed in any one of claims 1 to 6 for organic waste anaerobic dry fermentation,
It is characterized by comprising following steps:
(1) raw material preparation: the iron-based raw material grinding and sieving that will acquire obtains zeroth order iron powder, spare；The straw that will acquire
Or bamboo and wood raw material crushes after natural air drying, it is spare；The zeolite materials grinding and sieving that will acquire obtains zeolite powder, spare；
(2) mass percent for obtaining step (1) is 60.0%-65.0% zeroth order iron powder, mass percent 25.0%-
After 30.0% straw or bamboo powder, the zeolite powder that mass percent is 5.0%-15.0% are sufficiently mixed, obtain iron-based
Compounded mix is spare；
(3) the uniform spreading of iron-based compounded mix for obtaining step (2) is formed iron-based compound on the non-woven geotextile
Packing layer, then tile one layer of non-woven geotextile on it again；
(4) iron-based compounded mix is fixed between two layers of non-woven geotextile using needle point method, described fill out is made
Material liner.
8. the preparation method of the matrix liner according to claim 7 for organic waste anaerobic dry fermentation, feature exist
In: the every square meter of usage amount of the iron-based compounded mix is not less than 5.3kg；The non-woven geotextile of the bottom with a thickness of
1.7-5.0mm, the non-woven geotextile on the surface layer with a thickness of 1.7-5.0mm；Zeroth order iron particle size after the sieving is
80-200 mesh；The straw or bamboo powder are the powder that partial size is 0.074-0.613mm after crushing；After the sieving
Zeolite powder granularity be 80-200 mesh.
9. a kind of application of the matrix liner as claimed in any one of claims 1 to 6 for organic waste anaerobic dry fermentation, special
Sign is: during organic waste anaerobic dry fermentation, the matrix liner and organic waste pass through the side of stratiform cross arrangement
Formula is laid with according to one layer of matrix liner, the sequence of one layer of organic waste to the design heap height of anaerobic reactor from top to bottom；Such as into
Expect when rubbish solid content and higher content of organics (solid content > 35%wt, content of organics > 85%TS), it can be in junk-heap body
Bottom and top suitably overlay liner.
10. the application of the matrix liner according to claim 9 for organic waste anaerobic dry fermentation, it is characterised in that:
Every meter of organic waste heap height is laid with no less than 2 layers of matrix liner；Every layer of matrix liner can be used continuously 3-5 organic matter and detest
Aerobe fermentation period, each anaerobic fermentation of organisms period are 30-40 days.
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| CN113264558A (en) * | 2021-04-15 | 2021-08-17 | 大连理工大学盘锦产业技术研究院 | Fe3O4Preparation method and application of/Silicate-1 molecular sieve nanocrystalline composite material |
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