CN107604008A - A kind of method added slag and make acidifying production natural pond system recover aerogenesis - Google Patents
A kind of method added slag and make acidifying production natural pond system recover aerogenesis Download PDFInfo
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- CN107604008A CN107604008A CN201710882406.0A CN201710882406A CN107604008A CN 107604008 A CN107604008 A CN 107604008A CN 201710882406 A CN201710882406 A CN 201710882406A CN 107604008 A CN107604008 A CN 107604008A
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- acidifying
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The present invention relates to technical field of biological fermentation, more particularly to a kind of slag that adds to make the method for acidifying production natural pond system recovery aerogenesis, i.e.,：In the acidifying production natural pond system, 1.2 ~ 2.2g/ of slag amount (L zymotic fluids) is added so that system initial pH value is adjusted to 6.0 ~ 8.5, and recovery aerogenesis is carried out under the conditions of 33 ~ 37 DEG C.PH value is not less than 4.50 in acidifying production natural pond system of the present invention, acidificatoin time（Never aerogenesis starts to calculate）No more than 5d；Described slag calcium oxide content is 40% ~ 60%, and content of magnesia is 2% ~ 10%, and this method can make the acidifying of stopping aerogenesis producing natural pond system recovery aerogenesis, and contain iron in slag, manganese, and the element such as phosphorus can promote the growth of methane backeria, and then improve biogas output；And this method step is simple, cost is cheap.
Description
Technical field
The present invention relates to technical field of biological fermentation, more particularly to one kind to make acidifying produce the recovery of natural pond system by adding slag
The method of aerogenesis.
Background technology
Anaerobic digestion is special at first in the degradation technique that 1950s scale applications are used for sanitary sewage and brutish fecal sewage
It is not suitable for High water cut, degradable material characteristic.The minimizing that can realize rubbish by anaerobic digestion is handled, and life
The biomass castoffs such as rubbish are converted into high-grade biological flue gas and organic fertilizer, but in anaerobic digestion process, work as natural pond
When gas fermentation system feeds excessive, temperature shock or is mixed into noxious material, methanogen can be suppressed, in marsh gas fermenting system
Hydrolysate can not consume in time, it is unbalance between hydrolysis production acid and methane phase, so as to cause Accumulation of Organic Acids, reduce pH value,
Further suppress methanogen, final factor of created gase, which declines, even stops aerogenesis.
Recovery for acidifying production natural pond system, industrially conventional is chemical restoring method, predominantly adds NaOH, Ca
(OH)2Deng hydroxide, the method can effectively lift the pH of acidifying production natural pond system, realize the recovery of pH in anaerobic system in a short time.
But the hydroxide added such as Ca (OH)2Consumed mostly by carbonate, due to lacking buffer capacity to acid and alkali, anaerobic reactor
Interior pH, which occurs, significantly shakes process, it is difficult to maintains a long-term stability, is unfavorable for consuming the activity of hydrogen acetogen and methanogen
Recover, anaerobic digester system collapse is resulted even under partial picture.PH value is adjusted to neutrality by this method, and dosage is larger, and is needed
To add for a long time to maintain the stable operation of anaerobic digester system, this causes higher acidifying Resuming agent.
And slag accounts for the 12% ~ 20% of thick yield as caused principal by product in steelmaking process, its include CaO, MgO,
SiO2, the multiple element such as FeO, and be used as alkaline Silicon-rich material, slag is a kind of potential anaerobic fermentation function promoter, can
To improve the methane phase efficiency of anaerobic digester system and stability to a certain extent, therefore slag is made into acid for adjusting pH value
It is the effective means that slag is carried out to twice laid that change system, which recovers aerogenesis, enable environmental protection and economic development coordinate into
OK.
The content of the invention
In order to solve superior's above mentioned problem, it is an object of the invention to provide a kind of acidifying that can make stopping aerogenesis producing natural pond system
System recovers aerogenesis, improves biogas output；And this method step is simple, cost is cheap, and the addition slag that raw material is easy to get makes acidifying
Produce the method that natural pond system recovers aerogenesis.
The technical scheme is that：It is a kind of acidifying is produced the method that natural pond system recovers aerogenesis by adding slag, specifically
Step is as follows：
Step 1：In natural pond system is produced in acidifying, slag amount 1.2-2.2g/ (L- zymotic fluids) is added, is stirred so that acidifying production
Initial pH value is adjusted to 6.0 ~ 8.5 in the system of natural pond,
Step 2：Enough nitrogen is filled with, anaerobic methane fermentation is carried out under the conditions of being 33 DEG C -37 DEG C in temperature, acidifying is produced natural pond system
System recovers aerogenesis, obtains biogas residue.
Further, this method can also be：In natural pond system is produced in acidifying, 1.4 ~ 1.7g/ of slag amount (L- zymotic fluids) is added, is stirred
Mix uniformly so that initial pH value is adjusted to 6.5 ~ 7.5 in acidifying production natural pond system, is filled with enough nitrogen, is 35 DEG C -37 DEG C in temperature
Under the conditions of carry out anaerobic methane fermentation, make acidifying production natural pond system recover aerogenesis.
Further, the pH value of the natural pond system of acidifying production described in step 1 is not less than 4.50, and acidificatoin time is no more than 5d.
Further, calcium oxide content is 40% ~ 60% in the slag, content of magnesia 2%-10%.
Further, in the slag heavy metal As≤30mg/kg, Cr≤300 mg/kg, Pb≤100 mg/kg, Hg≤
The mg/kg of 5 mg/kg, Cd≤3.
Further, the biogas residue recovered obtained by aerogenesis, biogas slurry comply fully with heavy metal in NY/T 2065-2011 and permitted
Perhaps scope.Biogas residue can be used as fuel, can act also as organic fertilizer use.
The invention has the advantages that：By adding slag to acidifying production natural pond system, pH value can be adjusted rapidly so that production
Methane backeria is in suitable pH value growth scope（6.8-7.2）So that acid system comparatively fast recovers aerogenesis, and then improves biogas hair
The gas production and utilization ratio of ferment system；And the buffer substance contained in slag（CaO, MgO etc.）Can more whole mistake
Journey equilibrium system basicity, make recovery gas production system more stable.Various trace elements in slag, methanogen work can be improved
Property, methane production is finally improved, not only step is few for the method, and method is easy, and accessory substance of the slag as steel-making industry, cost
It is cheap.
The above-mentioned technical proposal of the present invention has the advantages that：It is of the present invention acidifying production natural pond system is recovered production
The method of gas, by adding slag in the biogas fermentative liquid to acidifying, you can make acidifying biogas fermentation recover aerogenesis, therefore improve
The utilization ratio of biogas fermentative liquid.This method not only makes acidifying biogas fermentative liquid recover aerogenesis, and the CaO contained in slag,
MgO can play cushioning effect so that methane phase system stablizes aerogenesis in the long period, further improves biogas output, therefore
This method achieves this unexpected technique effect；
The slag amount added within the scope of the present invention, content of beary metal meets technical specification (NY/T in caused biogas residue and biogas slurry
Allow index in 2065-2011), do not influence biogas residue, biogas slurry is agricultural.Slag supernatant pH stable is 7.5 or so after measured,
Therefore prevention can be reached by reuse supernatant or recover the generation of acidifying, this method can be used as corrective measure of the invention,
Stop addition slag and reuse slag supernatant, therefore compared to for conventional method, cost is lower.
Brief description of the drawings
Fig. 1 is the curve synoptic diagram using the accumulative methane production of each embodiment after the inventive method.
Fig. 2 is to use the curve synoptic diagram that volatile fatty acid changes during each embodiment after the inventive method.
Fig. 3 is the basicity change curve schematic diagram of the embodiment of the present invention 1 and comparative example 1.
Embodiment
Embodiments of the present invention are described in further detail with reference to embodiment.Following examples are used to illustrate this
Invention, but can not be used for limiting the scope of the present invention.
Acidifying biogas slurry used of the invention is for kitchen garbage with caused acidifying solution during anaerobic sludge digestion, it is necessary to illustrate
, the acidifying biogas fermentative liquid is merely illustrative and description for the sake of provide, rather than say that the method for the invention is only applicable to
The acidifying biogas fermentative liquid.
It is described acidifying biogas fermentative liquid production method be：Kitchen garbage 2000ml, it is inoculated with long-term acclimation sludge 2000ml
（Inoculation acclimation sludge is selected from the secondary sedimentation tank of sewage treatment work mud extraction of Xiao Jia rivers）, nitrogen is filled with after being sufficiently mixed to obtain anaerobism ring
Border, and anaerobic fermentation is carried out at 35 DEG C, bionethanation system pH value is down to 5.85 after 3 days, and 7d pH value is 5.15, natural pond now
Liquid is acidified biogas fermentative liquid needed for being.
The slag of following examples is the waste residue of metallurgical industry discharge.
The present invention is a kind of to make acidifying produce the method that natural pond system recovers aerogenesis by adding slag, and this method specific steps are such as
Under：
Step 1：In natural pond system is produced in acidifying, slag amount 1.2-2.2g/ (L- zymotic fluids) is added, is stirred so that acidifying production
Initial pH value is adjusted to 6.0 ~ 8.5 in the system of natural pond,
Step 2：Enough nitrogen is filled with, anaerobic methane fermentation is carried out under the conditions of being 33 DEG C -37 DEG C in temperature, acidifying is produced natural pond system
System recovers aerogenesis, and obtains biogas residue.
The present invention is a kind of to make acidifying produce the method that natural pond system recovers aerogenesis by adding slag, and this method specific steps are such as
Under：
Step 1：In natural pond system is produced in acidifying, 1.4 ~ 1.7g/ of slag amount (L- zymotic fluids) is added, is stirred so that acidifying production
Initial pH value is adjusted to 6.5 ~ 7.5 in the system of natural pond,
Step 2：Enough nitrogen is filled with, anaerobic methane fermentation is carried out under the conditions of being 35 DEG C -37 DEG C in temperature, acidifying is produced natural pond system
System recovers aerogenesis.
The pH value of the natural pond system of acidifying production described in the step 1 is not less than 4.50, and acidificatoin time is no more than 5d.
Calcium oxide content is 40% ~ 60% in slag described in the step 1, content of magnesia 2%-10%.
The mg/ of As≤30mg/kg of heavy metal in the slag, Cr≤300 mg/kg, Pb≤100 mg/kg, Hg≤5
The mg/kg of kg, Cd≤3.
Biogas residue, biogas slurry obtained by the recovery aerogenesis comply fully with heavy metal allowed band in NY/T 2065-2011,
Biogas residue can be used as fuel, can act also as organic fertilizer use.
Embodiment 1：
A kind of method for making acidifying produce natural pond system recovery aerogenesis by adding slag is present embodiments provided, i.e.,：Take acidifying biogas
Zymotic fluid 400ml, slag addition 1.2g/L- zymotic fluids, while 5min is stirred so that being well mixed, now pH value is about 6.0,
It is filled with nitrogen and ensures anaerobic environment, anaerobic methane fermentation is carried out at 35 DEG C.
Embodiment 2：
A kind of method for making acidifying produce natural pond system recovery aerogenesis by adding slag is present embodiments provided, it is basic with embodiment 1
It is identical, it only difference is that：Slag addition 1.6g/L- zymotic fluids, pH value is about 7.0, and anaerobic methane hair is carried out at 35 DEG C
Ferment.
Embodiment 3：
A kind of method for making acidifying produce natural pond system recovery aerogenesis by adding slag is present embodiments provided, it is basic with embodiment 1
It is identical, it only difference is that：Slag addition 2.2g/L- zymotic fluids, pH value is about 8.5, and anaerobic methane hair is carried out at 35 DEG C
Ferment.
By the methods described of above-described embodiment 1 ~ 3, after acidifying production natural pond system recovers methane phase, accumulative methane production is respectively
1898ml, 2235ml and 1729ml（Referring to Fig. 1）.The change of the volatile fatty acid of gas generation process is referring to Fig. 2.
Analyzed from Fig. 1 and Fig. 2, under above-mentioned three kinds of embodiments, can recover aerogenesis on the day of acid system, work as acidifying
After system initial pH value is adjusted to suitable scope, suitable living environment, methanogen raised growth are provided to methanogen
Breeding, metabolic activity is carried out using the organic acid in biogas slurry, produces substantial amounts of methane, but to the later stage due to bionethanation system
Volatile fatty acid, which is depleted system aerogenesis, to be terminated, if circulation supplement substrate in time, you can the biogas fermentative liquid is continued aerogenesis.
It should be noted that the method and its similar approach of circulation addition substrate, equally within protection scope of the present invention.
Comparative example 1：
Acidifying digestive juice 400ml same as the previously described embodiments is taken, adjusts the pH value of acidification system to 6 with sodium hydroxide, hydrogen-oxygen
It is 2.2 g/L- zymotic fluids to change sodium addition, carries out recovering aerogenesis experiment under the same conditions with embodiment 1.
Interpretation of result shows, the methods described of embodiment 1 and the methods described of comparative example 1（That is tradition addition alkali lye method）Make
The bionethanation system that must be acidified recovers aerogenesis, and cumulative gas when addition slag regulation acid system initial pH value is 6 is
1898ml, the cumulative gas that alkali lye is added compared with comparative example 1 improve 44.6%, as can be seen from Figure 3：The addition of slag can not only carry
High alkalinity, and good cache hierarchy can be formed so that the basicity of recovery aerogenesis system is more stable, and then improves biogas production
Amount.Slag amount ratio sodium hydroxide concentration is few when acid system pH value is adjusted into 6, illustrates the slag and sodium hydroxide of same amount,
Basicity improves different.This measure illustrates that the methods described of embodiment 1 can not only recover acidifying production natural pond system aerogenesis rapidly, and causes
System is more stable, improves and lays a good foundation for methane production.
Acidifying production natural pond system acidifying production natural pond system comparative example 2,
Acidifying digestive juice 400ml same as the previously described embodiments is taken, does not add any alkaline matter or slag regulation pH value, anaerobism
Under carry out recover aerogenesis experiment.
The aerogenesis result of comparative example is shown in Fig. 1, during volatile fatty acid change see Fig. 2.
It is that can not voluntarily recover to produce that the result of comparative example 2, which illustrates that acidifying produces natural pond system not adding any material for improving basicity,
Gas.
Fig. 3 is shown in the change of the basicity of embodiment 1 and comparative example 1.Fig. 3 is understood, is added slag and is added alkali that acid system is adjusted into phase
Same pH value（6.0）When, add slag system basicity relatively plus alkali systems are high, and add slag system basicity to recover aerogenesis early stage the bottom of due to
Thing degraded is improved to 12.5 or so rapidly after slightly decreasing, and stably until fermentation ends.And add the basicity of alkali group to reduce always,
This is also to stop aerogenesis reason after this method recovers aerogenesis, caused by system is unstable.
Embodiments of the invention provide for the sake of example and description, and are not exhaustively or by this to send out
It is bright to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Choosing
Select and describe embodiment and be to more preferably illustrate the principle and practical application of the present invention, and make one of ordinary skill in the art
It will be appreciated that the present invention is so as to designing the various embodiments with various modifications suitable for special-purpose.
Claims (6)
1. a kind of make acidifying produce the method that natural pond system recovers aerogenesis by adding slag, it is characterised in that this method specific steps
It is as follows：
Step 1：In natural pond system is produced in acidifying, slag amount 1.2-2.2g/ (L- zymotic fluids) is added, is stirred so that acidifying production
Initial pH value is adjusted to 6.0 ~ 8.5 in the system of natural pond,
Step 2：Enough nitrogen is filled with, anaerobic methane fermentation is carried out under the conditions of being 33 DEG C -37 DEG C in temperature, acidifying is produced natural pond system
System recovers aerogenesis, and obtains biogas residue.
2. a kind of make acidifying produce the method that natural pond system recovers aerogenesis by adding slag, it is characterised in that this method specific steps
It is as follows：
Step 1：In natural pond system is produced in acidifying, 1.4 ~ 1.7g/ of slag amount (L- zymotic fluids) is added, is stirred so that acidifying production
Initial pH value is adjusted to 6.5 ~ 7.5 in the system of natural pond,
Step 2：Enough nitrogen is filled with, anaerobic methane fermentation is carried out under the conditions of being 35 DEG C -37 DEG C in temperature, acidifying is produced natural pond system
System recovers aerogenesis.
3. method according to claim 1 or 2, it is characterised in that the pH value of the natural pond system of acidifying production described in the step 1
Not less than 4.50, acidificatoin time is no more than 5d.
4. method according to claim 1 or 2, it is characterised in that calcium oxide content is in slag described in the step 1
40% ~ 60%, content of magnesia 2%-10%.
5. method according to claim 1 or 2, it is characterised in that As≤30mg/kg of heavy metal, Cr in the slag
The mg/kg of≤300 mg/kg, Pb≤100 mg/kg, Hg≤5 mg/kg, Cd≤3.
6. method according to claim 1 or 2, it is characterised in that the biogas residue recovered obtained by aerogenesis, biogas slurry accord with completely
Heavy metal allowed band in NY/T 2065-2011 is closed, biogas residue can be used as fuel, can act also as organic fertilizer use.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110078332A (en) * | 2019-05-13 | 2019-08-02 | 北京林业大学 | A method of promoting excess sludge anaerobic fermentation and acid production using modified steel scoria |
| CN114990165A (en) * | 2022-05-26 | 2022-09-02 | 沈阳航空航天大学 | Method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge ash |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105967481A (en) * | 2016-06-16 | 2016-09-28 | 安徽工业大学 | Composite ingredient for prompting anaerobic fermentation of cow dung to produce methane |
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2017
- 2017-09-26 CN CN201710882406.0A patent/CN107604008A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967481A (en) * | 2016-06-16 | 2016-09-28 | 安徽工业大学 | Composite ingredient for prompting anaerobic fermentation of cow dung to produce methane |
Non-Patent Citations (1)
| Title |
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| 于雷等: "厌氧反应器的酸化及其恢复研究进展", 《工业水处理》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110078332A (en) * | 2019-05-13 | 2019-08-02 | 北京林业大学 | A method of promoting excess sludge anaerobic fermentation and acid production using modified steel scoria |
| CN110078332B (en) * | 2019-05-13 | 2021-07-27 | 北京林业大学 | Method for promoting anaerobic fermentation of excess sludge to produce acid by using modified steel slag |
| CN114990165A (en) * | 2022-05-26 | 2022-09-02 | 沈阳航空航天大学 | Method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge ash |
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