CN107858380A - A kind of devices and methods therefor for improving kitchen garbage anaerobic methane production - Google Patents
A kind of devices and methods therefor for improving kitchen garbage anaerobic methane production Download PDFInfo
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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
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- C12M23/00—Constructional details, e.g. recesses, hinges
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- C12M23/36—Means for collection or storage of gas; Gas holders
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- C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
- C12M27/02—Stirrer or mobile mixing elements
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Abstract
A kind of devices and methods therefor for improving kitchen garbage anaerobic methane production, it relates generally to organic solid waste processing technology field.This method by the citric acid chelated iron of green, environmental protection by being added to progress anaerobic digestion reaction in kitchen garbage anaerobism bottle so that biogas yield increases substantially caused by reaction, and corresponding methane production and relative amount are also increased.In addition, the device of above-mentioned raising kitchen garbage anaerobic methane production, which is the method based on above-mentioned raising kitchen garbage anaerobic methane production, carries out matched design, its is simple in construction, easy to use, reliable, can effectively ensure being normally carried out for anaerobic digestion reaction.Therefore, the devices and methods therefor of above-mentioned raising kitchen garbage anaerobic methane production, the relative productivity of biogas yield and methane is effectively improved, realizes the recycling of kitchen garbage, and also there is the advantages of energy-conserving and environment-protective, therefore it has important application value.
Description
Technical field
The present invention relates to organic solid waste processing technology field, and kitchen garbage anaerobism is improved in particular to one kind
The devices and methods therefor of methane phase.
Background technology
In recent years, with the continuous improvement of people's living standards, the kitchen garbage yield in China is from 90,000,000 tons of 2011
It is quick bring up to 2016 163500000 tons.Organic dry matter content in kitchen garbage is up to 97%, perishable, rotten, hair
Smelly, growth mosquitos and flies.In addition, pathogen, pathogenic microorganism in kitchen garbage be present, can be to environment and health if not dealing carefully with
Generation harm, restrict economic, society lasting, harmonious development.
Anaerobic digestion process has the advantages that low row's carbon, low energy consumption, the recyclable renewable sources of energy, is widely used in handling organic
Solid waste.However, in Practical Project, during anaerobic digestion of kitchen wastes, often because easily biodegradable organicses content is high, micro
Element such as lacks at the reason, and causing to be metabolized required enzyme and coenzyme to synthesize, and seriously limit the growth of methanogen, Jin Erzao
It is low into biogas yield and methane content.
The content of the invention
It is an object of the invention to provide a kind of method for improving kitchen garbage anaerobic methane production, it can promote methane
Produce, improve methane production, realize the recycling of kitchen garbage, and harm will not be produced to environment and health.
Another object of the present invention is to provide a kind of device for improving kitchen garbage anaerobic methane production, it can used
The method of above-mentioned raising kitchen garbage anaerobic methane production carries out use during anaerobic methane production, is detested using above-mentioned raising kitchen garbage
The devices and methods therefor of oxygen methane phase, methane production can be improved, improve the resource utilization of kitchen garbage.
The present invention, which solves its technical problem, to be realized using following technical scheme.
The present invention proposes a kind of method for improving kitchen garbage anaerobic methane production, and it includes：
Deoxygenation is handled：Closed chamber is placed in by anaerobic sludge, by pretreated kitchen garbage and citric acid chelated iron
Interior, and deoxygenation processing is carried out to airtight chamber, make to be in anaerobic environment in airtight chamber；
Anaerobic methane production：Heat in the airtight chamber treated to passing through deoxygenation, and stir simultaneously in airtight chamber
Anaerobic sludge, kitchen garbage and citric acid chelated iron；
Gas collection：It is collected to producing the gas in airtight chamber during anaerobic methane production.
Further, among preferred embodiments of the present invention, the dosage of above-mentioned citric acid chelated iron is 0.64-
0.66mg/gVS。
Further, among preferred embodiments of the present invention, the dosage of above-mentioned citric acid chelated iron is 0.65mg/
gVS。
Further, among preferred embodiments of the present invention, the preprocessing process of above-mentioned kitchen garbage is included to collecting
To original kitchen garbage be rinsed, sort and smash to pieces successively.
Further, among preferred embodiments of the present invention, the above-mentioned kitchen garbage by smashing to pieces is in granular form, right
Answer a diameter of 2-3mm.
Further, among preferred embodiments of the present invention, in above-mentioned carry out deoxygenation processing procedure, carried out using nitrogen
Exhaust.
Further, among preferred embodiments of the present invention, the mode of heating during above-mentioned anaerobic methane production uses
Heating water bath, and heating-up temperature is 34.5-35.5 DEG C；Agitating mode during anaerobic methane production uses magnetic agitation, and
And the rotating speed of magnetic agitation is 115-125rpm.
Further, among preferred embodiments of the present invention, during above-mentioned anaerobic methane production, hydraulic detention time and
Sludge retention time is 34-36d.
Further, it is above-mentioned during gas collection is carried out among preferred embodiments of the present invention, using draining
Gas collection method is collected to gas.
The present invention proposes a kind of device for improving kitchen garbage anaerobic methane production, and it includes being used to carry out anaerobic digestion reaction
Anaerobism bottle, for the magnetic stirring apparatus and draining gas collecting apparatus to being heated and being stirred in anaerobism bottle, draining gas collection dress
Put and be removably communicated in anaerobism bottle.
It is provided in an embodiment of the present invention improve kitchen garbage anaerobic methane production the beneficial effect of devices and methods therefor be：It is logical
Cross the citric acid chelated iron of green, environmental protection, be added in kitchen garbage anaerobism bottle and carry out methane phase so that be raw caused by anaerobism
Thing gas yield increases substantially, and corresponding methane production and content are also increased.Therefore, it is provided in an embodiment of the present invention
The devices and methods therefor of kitchen garbage anaerobic methane production is improved, the generation of methane is promoted, realizes the recycling of kitchen garbage
Utilize, and harm will not be produced to environment and health, therefore it has important application value.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the method flow schematic diagram of raising kitchen garbage anaerobic methane production provided in an embodiment of the present invention；
Fig. 2 is the structural representation of the device of raising kitchen garbage anaerobic methane production provided in an embodiment of the present invention；
Fig. 3 is the change that biogas yield after reaction corresponding to constituents is reacted in different anaerobic digestions in test example of the present invention
Change curve map；
Fig. 4 is biogas constituent after the reaction corresponding to different anaerobic digestions reaction constituents in test example of the present invention
Relative scale block diagram.
Icon：100- improves the device of kitchen garbage anaerobic methane production；120- anaerobism bottles；140- magnetic stirring apparatus；160-
Draining gas collecting apparatus.
Embodiment
, below will be in the embodiment of the present invention to make the purpose, technical scheme and advantage of the embodiment of the present invention clearer
Technical scheme be clearly and completely described.Unreceipted actual conditions person, builds according to normal condition or manufacturer in embodiment
The condition of view is carried out.Agents useful for same or the unreceipted production firm person of instrument, it is the conventional production that can be obtained by commercially available purchase
Product.
The device 100 of the raising kitchen garbage anaerobic methane production to the embodiment of the present invention and its method are carried out specifically below
It is bright.
A kind of method for improving kitchen garbage anaerobic methane production provided in an embodiment of the present invention, it comprises the following steps, please
Reference picture 1：
S1, deoxygenation processing：It is placed in by anaerobic sludge, by pretreated kitchen garbage and citric acid chelated iron closed
In chamber, and deoxygenation processing is carried out to airtight chamber, make to be in anaerobic environment in airtight chamber.
Further, in deoxygenation processing procedure provided in an embodiment of the present invention, the preprocessing process of kitchen garbage includes pair
The original kitchen garbage being collected into is rinsed, sorts and smashed to pieces successively.Specifically the kitchen garbage running water by collection
It is rinsed, to reduce oil and salinity contained therein, then, bone, plastic products, the paper manually jumped out in kitchen garbage
The debris such as towel, finally, it is 2-3mm that kitchen garbage, which is smashed to pieces to particle diameter,.
It should be noted that the pretreatment of kitchen garbage can improve the active ingredient that kitchen garbage carries out anaerobic reaction,
And the material for suppressing anaerobic reaction in kitchen garbage is reduced, therefore, it is advantageous to improve the methane during follow-up anaerobic reaction
Yield.
Further, the anaerobic sludge that the present embodiment provides is derived from the upward flow anaerobic reactor of certain brewery, its property
And the above-mentioned property by pretreated kitchen garbage is as shown in table 1：
The property of the kitchen garbage of table 1 and seed sludge
Further, the citric acid chelated iron that the present embodiment provides is bought in market, and its property is as shown in table 2：
The property of the citric acid chelated iron of table 2
Further, among the embodiment of the present invention, in deoxygenation processing procedure is carried out, it is exhausted using nitrogen.Tool
Operate body and be, be passed through nitrogen 8-12min to airtight chamber, then seal airtight chamber.It should be noted that the present invention is real
Apply example to be exhausted using nitrogen, the air in airtight chamber can be emptied to greatest extent, so that airtight chamber Nei Chu
In the state of an anoxic, be so advantageous to the anaerobic reaction of next step.
S2, anaerobic methane production：Heated in the airtight chamber treated to passing through deoxygenation, and stir airtight chamber simultaneously
Interior anaerobic sludge, kitchen garbage and citric acid chelated iron.
Further, among the embodiment of the present invention, the mode of heating during anaerobic methane production uses heating water bath, and
And heating-up temperature is 34.5-35.5 DEG C.It should be noted that 35 DEG C of heating-up temperature is preferably used, and why to heating
Temperature is defined, be because the generation too high or too low for temperature for being unfavorable for anaerobic reaction during anaerobic methane production, this its
In main reasons is that, the height of temperature influences whether the activity of various enzymes during anaerobic reaction, and this is for anaerobe
Normal metabolism can have large effect, and therefore, the embodiment of the present invention is by limiting 34.5-35.5 DEG C of heating temperature
Degree, can effectively ensure that anaerobic reaction is normally carried out, and be advantageous to improve methane production.
Further, in order to ensure various material mixings during anaerobic methane production more fully, anaerobe energy
It is enough normally to carry out forming metabolism, the agitating mode of the invention used during anaerobic reaction is carried out for magnetic agitation, and
The rotating speed control 115-125rpm of magnetic agitation.It should be noted that by the magnetic agitation of certain rotating speed, can be with anaerobic reaction
What is carried out is more thorough, so as to be advantageous to the more anaerobic reaction products of output.
Further, among the embodiment of the present invention, the dosage of citric acid chelated iron is 0.64-0.66mg/gVS.Need
It is noted that adding for citric acid chelated iron is primarily due to it and can slowly discharged in anaerobic digestion process, avoid micro
Element (Fe) and the sulfate ion in solution, sulphion and carbanion reaction generation precipitation, improve Fe microorganism profit
With rate, and promote the activity of respective metal enzyme, in addition, the iron contained by citric acid chelated iron is that anaerobe is many important
The part of enzyme (such as carbon monoxide dehydrogenase (CODH), coenzyme M (Co-M), F420), it can promote anaerobic digestion to react
Be normally carried out.
In addition, it is necessary to, it is emphasized that citric acid chelated iron using there is the advantages of for the use of two：First, citric acid chela
The citric acid and organic active substance that conjunction iron slowly discharges can be as the substrates of anaerobic digestion, in the physical chemistry of anaerobe
Under effect, methane is changed into, this is advantageous to improve methane production；Second, citric acid chelated iron will not damage to environment, nothing
It is malicious, harmless more green.
Based on every advantage of above-mentioned citric acid chelated iron, in order to give full play of citric acid chelated iron in anaerobic digestion
Effect in journey, the embodiment of the present invention preferably limit the dosage of citric acid chelated iron as 0.65mg/gVS.
Further, among the embodiment of the present invention, during anaerobic methane production, when hydraulic detention time and sludge retention
Between it is longer, it is 34-36d.It should be noted that longer hydraulic detention time and sludge retention time can make anaerobism disappear
Change the more composition that reaction is carried out, resource utilization is higher.
S3, gas collection：It is collected to producing the gas in airtight chamber during anaerobic methane production.
Further, among the embodiment of the present invention, when carrying out gas collection, gas is carried out using draining water gathering of gas law
Collect.It is the biogas purity height because its collection it should be noted that why using draining water gathering of gas law, and collect
More fully, waste less, pollution is also small.
Fig. 2 is refer to, the embodiment of the present invention also proposes a kind of device 100 for improving kitchen garbage anaerobic methane production, and it is wrapped
Include for carry out anaerobic digestion reaction anaerobism bottle 120, for the magnetic stirring apparatus to being heated and being stirred in anaerobism bottle 120
140 and draining gas collecting apparatus 160, removably sealing is communicated in anaerobism bottle 120 to draining gas collecting apparatus 160.Need what is illustrated
It is that the device 100 by improving kitchen garbage anaerobic methane production can implement the side of above-mentioned raising kitchen garbage anaerobic methane production
Method, it can realize the maximization of kitchen garbage resource utilization, be the important practicing mode of energy-conserving and environment-protective measure.
The feature and performance of the present invention are described in further detail with reference to embodiments.
Embodiment 1
The present embodiment provides a kind of method for improving kitchen garbage anaerobic methane production, and it is in above-mentioned raising kitchen garbage
Implemented in the device 100 of anaerobic methane production, it specifically includes following steps：
The kitchen garbage of collection is rinsed with running water to kitchen garbage, then manually chooses the bone in kitchen garbage
The debris such as head, plastic products, paper handkerchief, finally, then kitchen garbage smashed to pieces to 2-3mm.
The anaerobism bottle 120 that volume is 500mL is cleaned up, and loads 200mL kitchens in the starting stage of anaerobism bottle 120
After rubbish and 50mL anaerobic sludge, calculated according still further to Fe dosages 0.11mg/gVS mode, add citric acid chelated iron
Measure as 0.65mg/gVS, after then leading to 10min nitrogen in anaerobism bottle 120, use rubber stopper seal.
The material of anaerobism bottle 120 is heated and stirred with magnetic stirring apparatus 140, water bath heating temperature is 35 DEG C, magnetic
The rotating speed of power stirring is 120rpm, it is necessary to explanation, during heating stirring, proceeds by anaerobic digestion reaction, same with this
When, caused biogas in anaerobism bottle 120 is collected using draining gas collecting apparatus 160.In addition, it is necessary to, it is emphasized that originally
For embodiment in anaerobic digestion course of reaction is carried out, hydraulic detention time (HRT) and sludge retention time (SRT) are 35d.
Embodiment 2
The present embodiment provides a kind of method for improving kitchen garbage anaerobic methane production, and it is in above-mentioned raising kitchen garbage
Implemented in the device 100 of anaerobic methane production, it specifically includes following steps：
The kitchen garbage of collection is rinsed with running water to kitchen garbage, then manually chooses the bone in kitchen garbage
The debris such as head, plastic products, paper handkerchief, finally, then kitchen garbage smashed to pieces to 2-3mm.
The anaerobism bottle 120 that volume is 500mL is cleaned up, and loads 200mL kitchens in the starting stage of anaerobism bottle 120
After rubbish and 50mL anaerobic sludge, citric acid chelated iron is added according still further to 0.66mg/gVS dosages, then in anaerobism bottle 120
In lead to 12min nitrogen after, use rubber stopper seal.
The material of anaerobism bottle 120 is heated and stirred with magnetic stirring apparatus 140, water bath heating temperature is 35.5 DEG C,
The rotating speed of magnetic agitation is 125rpm, it is necessary to which explanation, during heating stirring, proceeds by anaerobic digestion reaction, with this
Meanwhile caused biogas in anaerobism bottle 120 is collected using draining gas collecting apparatus 160.In addition, it is necessary to, it is emphasized that
For the present embodiment in anaerobic digestion course of reaction is carried out, hydraulic detention time (HRT) and sludge retention time (SRT) are 35d.
Embodiment 3
The present embodiment provides a kind of method for improving kitchen garbage anaerobic methane production, and it is in above-mentioned raising kitchen garbage
Implemented in the device 100 of anaerobic methane production, it specifically includes following steps：
The kitchen garbage of collection is rinsed with running water to kitchen garbage, then manually chooses the bone in kitchen garbage
The debris such as head, plastic products, paper handkerchief, finally, then kitchen garbage smashed to pieces to 2-3mm.
The anaerobism bottle 120 that volume is 500mL is cleaned up, and loads 200mL kitchens in the starting stage of anaerobism bottle 120
After rubbish and 50mL anaerobic sludge, citric acid chelated iron is added according still further to 0.64mg/gVS dosages, then in anaerobism bottle 120
In lead to 8min nitrogen after, use rubber stopper seal.
The material of anaerobism bottle 120 is heated and stirred with magnetic stirring apparatus 140, water bath heating temperature is 34.5 DEG C,
The rotating speed of magnetic agitation is 115rpm, it is necessary to which explanation, during heating stirring, proceeds by anaerobic digestion reaction, with this
Meanwhile caused biogas in anaerobism bottle 120 is collected using draining gas collecting apparatus 160.In addition, it is necessary to, it is emphasized that
For the present embodiment in anaerobic digestion course of reaction is carried out, hydraulic detention time (HRT) and sludge retention time (SRT) are 35d.
Test example
Test example is experiment sample with embodiment 1 and combines control group (in the case of controlling effective Fe contents constant, respectively
Fe and only addition FeCl will be not added with2Anaerobic reaction as a comparison case) carried out analysis of experiments, its result please respectively refer to figure
3 and Fig. 4.
Reference picture 3 is as can be seen that adding up biogas yield among the embodiment of addition citric acid chelated iron will be significantly greater than
Fe and only addition FeCl are not added with same time2The tolerance of experimental control example, from fig. 4, it can be seen that in biogas composition, add
The embodiment methane production ratio of adding citric acid chelated iron be substantially higher in be not added with Fe and only addition a FeCl2Experimental control example
Methane production ratio.And by calculating, in the same circumstances, add raw caused by anaerobism in the embodiment of citric acid chelated iron
Thing gas output increased 50.8%, corresponding methane content is more than 60%, the FeCl with adding identical iron content2Compare, up to
To under conditions of identical methane production, Fe dosages can reduce 18.9%, therefore, can prove, be provided in the embodiment of the present invention 1
Raising kitchen garbage anaerobic methane production device 100 and its method, considerably improve biogas yield and methane it is pure
Degree, achieves apparent beneficial effect.
In summary, it is provided in an embodiment of the present invention improve kitchen garbage anaerobic methane production method by by green, ring
The citric acid chelated iron of guarantor, it is added in kitchen garbage anaerobism bottle and carries out methane phase so that biogas yield is big caused by anaerobism
Amplitude improves, and corresponding methane production and relative amount are also increased.In addition, provided in an embodiment of the present invention improve meal
The device of kitchen rubbish anaerobic methane production is that the method based on above-mentioned raising kitchen garbage anaerobic methane production carries out matched design, its
The yield of biogas and the purity of methane can be improved, it is possible to increase the resource utilization of kitchen garbage.Therefore, the embodiment of the present invention
The devices and methods therefor of the raising kitchen garbage anaerobic methane production of offer, is effectively improved the relative of biogas yield and methane
Yield, the recycling of kitchen garbage is realized, and also there is the advantages of energy-conserving and environment-protective, therefore it has important popularization should
With value.
Embodiments described above is part of the embodiment of the present invention, rather than whole embodiments.The reality of the present invention
The detailed description for applying example is not intended to limit the scope of claimed invention, but is merely representative of the selected implementation of the present invention
Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
Claims (10)
- A kind of 1. method for improving kitchen garbage anaerobic methane production, it is characterised in that it includes：Deoxygenation is handled：It is placed in by anaerobic sludge, by pretreated kitchen garbage and citric acid chelated iron in airtight chamber, And deoxygenation processing is carried out to the airtight chamber, make to be in anaerobic environment in the airtight chamber；Anaerobic methane production：Heated in the airtight chamber treated to passing through deoxygenation, and stir the closed chamber simultaneously The indoor anaerobic sludge, the kitchen garbage and the citric acid chelated iron；Gas collection：It is collected to producing the gas in the airtight chamber during anaerobic methane production.
- 2. the method according to claim 1 for improving kitchen garbage anaerobic methane production, it is characterised in that the citric acid chela The dosage for closing iron is 0.64-0.66mg/gVS.
- 3. the method according to claim 2 for improving kitchen garbage anaerobic methane production, it is characterised in that the citric acid chela The dosage for closing iron is 0.65mg/gVS.
- 4. the method according to claim 1 for improving kitchen garbage anaerobic methane production, it is characterised in that the kitchen garbage Preprocessing process include the original kitchen garbage that is collected into is rinsed, sorted and smashed to pieces successively.
- 5. the method according to claim 4 for improving kitchen garbage anaerobic methane production, it is characterised in that by what is smashed to pieces Kitchen garbage is in granular form, corresponding a diameter of 2-3mm.
- 6. the method according to claim 1 for improving kitchen garbage anaerobic methane production, it is characterised in that carry out deoxygenation processing During, it is exhausted using nitrogen.
- 7. the method according to claim 6 for improving kitchen garbage anaerobic methane production, it is characterised in that anaerobic methane production mistake Mode of heating in journey uses heating water bath, and heating-up temperature is 34.5-35.5 DEG C；Stirring side during anaerobic methane production Formula uses magnetic agitation, and the rotating speed of magnetic agitation is 115-125rpm.
- 8. the method according to claim 1 for improving kitchen garbage anaerobic methane production, it is characterised in that anaerobic methane production mistake Cheng Zhong, hydraulic detention time and sludge retention time are 34-36d.
- 9. the method according to claim 1 for improving kitchen garbage anaerobic methane production, it is characterised in that carrying out gas receipts During collection, the gas is collected using draining water gathering of gas law.
- 10. a kind of device for improving kitchen garbage anaerobic methane production, it is characterised in that it includes being used to carry out anaerobic digestion reaction Anaerobism bottle, for the magnetic stirring apparatus and draining gas collecting apparatus to being heated and being stirred in the anaerobism bottle, the row Water gas collecting apparatus is removably communicated in the anaerobism bottle.
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Cited By (2)
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|---|---|---|---|---|
| CN108486167A (en) * | 2018-05-29 | 2018-09-04 | 南京林业大学 | A kind of method of iron based products prepared and its improve anaerobic methane production |
| CN112592015A (en) * | 2020-12-16 | 2021-04-02 | 同济大学 | Method for promoting anaerobic digestion of sludge to produce methane |
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