CN109609556A - A kind of synergisting method of anaerobic fermentation - Google Patents
A kind of synergisting method of anaerobic fermentation Download PDFInfo
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- CN109609556A CN109609556A CN201811496333.2A CN201811496333A CN109609556A CN 109609556 A CN109609556 A CN 109609556A CN 201811496333 A CN201811496333 A CN 201811496333A CN 109609556 A CN109609556 A CN 109609556A
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- Prior art keywords
- anaerobic fermentation
- charcoal
- magnetic bio
- bio charcoal
- synergisting method
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P5/00—Preparation of hydrocarbons or halogenated hydrocarbons
- C12P5/02—Preparation of hydrocarbons or halogenated hydrocarbons acyclic
- C12P5/023—Methane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention discloses the synergisting method in a kind of anaerobic fermentation process, anaerobic fermentation process can not only make solid waste reducing, recycling and methane as clean energy source that is innoxious, but also being can be used.The present invention adds magnetic bio charcoal during kitchen garbage and excess sludge common fermentation using voluntarily preparing magnetic bio charcoal, can significantly improve the efficiency of methane phase compared to the conventional medium fermentation that do not add and can be recycled to magnetic bio charcoal.The advantages of the invention patent is mainly reflected in: 1. magnetic bio charcoal can be recycled after fermentation；2. magnetic bio charcoal is prepared using solid waste, it can be achieved that solid waste recycles；3. significant effect, methane production is improved.
Description
Technical field
The invention belongs to field of environment engineering technology, in particular to a kind of synergisting method of anaerobic fermentation.
Background technique
When handling solid waste, minimizing, the recycling of solid waste may be implemented using anaerobic fermentation technology
With it is innoxious, biogas energy can be obtained and be back to life, and most there is the group of utility value to be divided into methane in biogas, account for about ratio
It is good gaseous fuel for 50%-70%.In the prior art in the synergy research of anaerobic fermentation, mainly using logical
It crosses and adds the abiotic conductive material such as charcoal, GAC, realize the synergy of anaerobic fermentation system, but added in this method
Medium can not be recycled effectively after the completion of reaction, cause the waste of material.
Summary of the invention
In order to overcome the disadvantages of the above prior art, the purpose of the present invention is to provide a kind of synergy sides of anaerobic fermentation
Method can both play synergy purpose by adding magnetic bio charcoal to anaerobic fermentation, and can terminate in reaction to adding
Magnetic bio charcoal is recycled.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of synergisting method of anaerobic fermentation, which is characterized in that in anaerobic fermentation, magnetic bio charcoal is added to anaerobism
In fermentation system, (record detected value) periodically is detected to gentle group of gas production, after substrate consumption is complete, is excluding digestive juice
When, recycle the magnetic bio charcoal in digestive juice.
Magnetic bio charcoal in the attractions systems such as specific usable magnet can be so that magnetic bio charcoal in digestive juice
Continue to stay in system, the digestive juice answered is put in exclusion, can continue to play the effect of magnetic bio charcoal after adding new matrix.
The magnetic bio charcoal is synthetically prepared by hydro-thermal method: under nitrogen protection, charcoal being added in ultrapure water, is shaken
Suspension is obtained after swinging, and FeCl is successively added into suspension3·6H2O、FeSO4·7H2O and sodium acetate, heating water bath later,
The black solid of synthesis is placed in a beaker cleaning, magnet is placed by beaker, solid can be adsorbed to beaker edge close to magnetic
Iron position, water is poured out, and repeated washing is for several times, spare after vacuum dried.
The ultrapure water consumption is 50mL, and charcoal dosage is 0.3g, FeCl3·6H2O dosage is 0.38g, FeSO4·
7H2O dosage is 0.24g, and sodium acetate dosage is 0.30g, and water bath heating temperature is 90 DEG C.
The production method of the charcoal is will to contain charcoal solid waste to be placed in 500 DEG C of anaerobic environments, control heating width
Degree is 10-15 DEG C/min, and temperature maintains 2h, is sieved after cooling after reaching 500 DEG C, and pore size control is done between 0.25mm-1mm
It is dry to store for future use.
The solid waste containing charcoal is sawdust.
The dosage of the magnetic bio charcoal is 1-20g/L.
The matrix of the anaerobic fermentation system is that kitchen garbage and excess sludge are configured by the 4:1 of weight in wet base ratio.
The anaerobic fermentation system temperature is 30-38 DEG C.
The magnetic bio charcoal anaerobic fermentation after reaction, be placed in mud discharging mouth to the magnetic green in system using magnet
Object charcoal is recycled and reused.Specifically using the magnetic bio charcoal in magnet attraction system, so that the magnetism in digestive juice
Charcoal continues to stay in system, and the digestive juice answered is put in exclusion, can continue to play magnetic bio charcoal after adding new matrix
Effect.
The dosing method of the magnetic bio charcoal is once to add or repeatedly add.
The advantages of the invention patent is mainly reflected in: 1. magnetic bio charcoal can be recycled after fermentation；
2. magnetic bio charcoal is prepared using solid waste, it can be achieved that solid waste recycles；3. significant effect, methane production is high.
Compared to existing processing method, the efficiency of methane fermentation can be significantly improved, while realizing the recycling of magnetic bio charcoal
It utilizes.Required magnetic bio charcoal can be prepared voluntarily, cheap and be easy to get, and play synergistic effect to anaerobic fermentation system
Realize and recycle that there is double benefit to economy and environment again.
Detailed description of the invention
Fig. 1 adds magnetic bio charcoal and adds up methane production variation diagram.
Specific embodiment
To keep implementation method of the invention apparent understandable, below with reference to specific example, the present invention is made further
It illustrates.
The present invention is applied in anaerobic fermentation systems, achieve good result, and specific embodiment is as follows: in anaerobic fermentation
Incipient stage detects gas production as adding magnetic bio charcoal in reaction system, and periodically.Anaerobism is carried out using the present invention
The synergism experiment of fermentation is studied, while the parallel control group of magnetic bio charcoal is not added in setting, and specific step is as follows.
(1) prepare magnetic bio charcoal: sawdust is put into crucible, and compacting reduces hole between sawdust, after capping, sawdust etc. is solid
Body waste is placed in 500 DEG C of anaerobic environments, and control increasing extent of temperature is 10-15 DEG C/min, and temperature maintains 2h after reaching 500 DEG C,
It is sieved after cooling, for pore size control between 0.25mm-1mm, stored dry is spare；Assigning magnetic process, the specific steps are take ultrapure water
50mL is added charcoal 0.3g and 0.38gFeCl is successively added into suspension after concussion mixes3·6H2O, 0.24gFeSO4·
7H2O, be added 0.30g sodium acetate, be placed on water-bath 4h under 90 degree, the above process should all be carried out under nitrogen protection, will be synthesized
Black solid be placed in a beaker wash with distilled water, magnet is placed by beaker, it is close that solid can be adsorbed to beaker edge
Magnet positions pour out water, and repeated washing is for several times, spare after vacuum dried.
(2) fermentation substrate and anaerobic seed sludge prepare: the matrix that this research uses is kitchen garbage and excess sludge, kitchen rubbish
Rubbish simulates real kitchen garbage component, specific ingredient is rice (15%), noodles (10%), potato (20%), Chinese cabbage (20%),
Carrot (13.8%), pork (10%), chicken (2%), egg (5%), oily (1%), salt (0.2%), excess sludge is derived from
Sewage plant secondary settling tank dehydrated sludge, kitchen garbage and excess sludge are configured by the 4:1 of weight in wet base ratio.In broken wall cooking machine
Mixed-matrix partial size is crushed to 1mm hereinafter, being uniformly mixed, by adding the TS of water management matrix to be 9.5%-10%.Anaerobism kind
Mud may be derived from sewage plant mesophilic digestion reactor.Kind mud and matrix relevant parameter are shown in Table 1.
1. sludge common fermentation matrix components of table and property
(2) 10mL kind mud is mixed respectively with matrix by load VS (matrix)/VS (kind mud) for 2.25, is added to four
In a 120mL serum bottle, number K1(blank), K2(blank control), F1(adding magnetic charcoal), F2It is (adding magnetic charcoal), dense according to 5g/L
It spends to F1And F2In add charcoal, the blank sample K that production two is not added magnetic bio charcoal under the conditions of equal1, K2, later
Through N2Stripping 2min excludes head space oxygen, after gland sealing, is placed in 35 DEG C of shaking baths, shaking table frequency is 120~130r/
min；
(3) gas production is quantitatively surveyed with glass syringe, gas is not when fermentation flask external and internal pressure is identical, in glass syringe
Rise again；500uL sample introduction needle takes gas, measures gas component by gas phase.Methane production consists of two parts: first is that fermentation flask
Head space portion gas, second is that the gas in needle tubing.Observe cumulative methane yield with the variation of cumulative time, as shown in Figure 1.
(4) after the completion of reaction, when excluding digestive juice, can just be made using the magnetic bio charcoal in the attractions system such as magnet
Magnetic bio charcoal in digestive juice continues to stay in system, the digestive juice answered is put in exclusion, and adding after new matrix can be after
Continuous to play a role, realization recycles.
It will be seen from figure 1 that addition magnetic bio charcoal, which produces gas velocity degree, is significantly faster than that the charcoal blank for being not added with charcoal
Control group, the accumulative methane production for adding magnetic bio charcoal improve about 20% or so.
Claims (10)
1. a kind of synergisting method of anaerobic fermentation, which is characterized in that in anaerobic fermentation, magnetic bio charcoal is added to anaerobism hair
In ferment system, periodically gentle group of gas production is detected, after substrate consumption is complete, when excluding digestive juice, is recycled in digestive juice
Magnetic bio charcoal.
2. the synergisting method of anaerobic fermentation according to claim 1, which is characterized in that the magnetic bio charcoal passes through hydro-thermal method
It is synthetically prepared: under nitrogen protection, charcoal being added in ultrapure water, suspension is obtained after concussion, successively add into suspension
Enter FeCl3·6H2O、FeSO4·7H2O and sodium acetate, heating water bath, is placed in a beaker cleaning for the black solid of synthesis later,
Magnet is placed by beaker, solid can be adsorbed to beaker edge close to magnet positions, water is poured out, and repeated washing for several times, passes through
It is spare after vacuum drying.
3. the synergisting method of anaerobic fermentation according to claim 2, which is characterized in that the ultrapure water consumption is 50mL, raw
Object charcoal dosage is 0.3g, FeCl3·6H2O dosage is 0.38g, FeSO4·7H2O dosage is 0.24g, and sodium acetate dosage is
0.30g, water bath heating temperature are 90 DEG C.
4. the synergisting method of anaerobic fermentation according to claim 2, which is characterized in that the production method of the charcoal be by
Solid waste containing charcoal is placed in 500 DEG C of anaerobic environments, and control increasing extent of temperature is 10-15 DEG C/min, and temperature is tieed up after reaching 500 DEG C
2h is held, is sieved after cooling, for pore size control between 0.25mm-1mm, stored dry is spare.
5. the synergisting method of anaerobic fermentation according to claim 4, which is characterized in that the solid waste containing charcoal is wood
Bits.
6. according to claim 1 to the synergisting method of any one of 5 anaerobic fermentations, which is characterized in that the magnetic bio charcoal
Dosage be 1-20g/L.
7. the synergisting method of anaerobic fermentation according to claim 1, which is characterized in that the matrix of the anaerobic fermentation system is
Kitchen garbage and excess sludge are configured by the 4:1 of weight in wet base ratio.
8. the synergisting method of anaerobic fermentation according to claim 1, which is characterized in that the anaerobic fermentation system temperature is
30-38℃。
9. the synergisting method of anaerobic fermentation according to claim 1, which is characterized in that the magnetic bio charcoal is in anaerobic fermentation
After reaction, mud discharging mouth is placed in using magnet to recycle and reuse the magnetic bio charcoal in system.
10. the synergisting method of anaerobic fermentation according to claim 1, which is characterized in that the side of adding of the magnetic bio charcoal
Formula is once to add or repeatedly add.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110171830A (en) * | 2019-05-16 | 2019-08-27 | 浙江科技学院 | A kind of preparation method and applications of N doping magnetic bio charcoal |
| CN111438159A (en) * | 2020-03-11 | 2020-07-24 | 上海交通大学 | Kitchen waste treatment system and treatment method |
| CN112624330A (en) * | 2020-12-30 | 2021-04-09 | 西安建筑科技大学 | Method for promoting anaerobic degradation of phenolic wastewater by adding biochar |
| CN113526818A (en) * | 2021-08-02 | 2021-10-22 | 江苏理工学院 | Process for accelerating methane generation from organic solid waste by using loaded ferromagnetic catalyst |
| CN113857231A (en) * | 2021-08-18 | 2021-12-31 | 广东工业大学 | Preparation of iron-based biochar wave-absorbing material and method for repairing mercury-contaminated soil through microwave synergy |
| CN114230005A (en) * | 2021-12-30 | 2022-03-25 | 中建安装集团有限公司 | Preparation method and application of magnetic biochar |
| CN114477683A (en) * | 2022-01-25 | 2022-05-13 | 安徽工程大学 | Pigment sludge treatment method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110171830A (en) * | 2019-05-16 | 2019-08-27 | 浙江科技学院 | A kind of preparation method and applications of N doping magnetic bio charcoal |
| CN111438159A (en) * | 2020-03-11 | 2020-07-24 | 上海交通大学 | Kitchen waste treatment system and treatment method |
| CN112624330A (en) * | 2020-12-30 | 2021-04-09 | 西安建筑科技大学 | Method for promoting anaerobic degradation of phenolic wastewater by adding biochar |
| CN113526818A (en) * | 2021-08-02 | 2021-10-22 | 江苏理工学院 | Process for accelerating methane generation from organic solid waste by using loaded ferromagnetic catalyst |
| CN113857231A (en) * | 2021-08-18 | 2021-12-31 | 广东工业大学 | Preparation of iron-based biochar wave-absorbing material and method for repairing mercury-contaminated soil through microwave synergy |
| CN114230005A (en) * | 2021-12-30 | 2022-03-25 | 中建安装集团有限公司 | Preparation method and application of magnetic biochar |
| CN114477683A (en) * | 2022-01-25 | 2022-05-13 | 安徽工程大学 | Pigment sludge treatment method |
| CN114477683B (en) * | 2022-01-25 | 2023-08-18 | 安徽工程大学 | Pigment sludge treatment method |
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