CN107837674A - A kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin - Google Patents
A kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin Download PDFInfo
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- CN107837674A CN107837674A CN201710509794.8A CN201710509794A CN107837674A CN 107837674 A CN107837674 A CN 107837674A CN 201710509794 A CN201710509794 A CN 201710509794A CN 107837674 A CN107837674 A CN 107837674A
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- waste gas
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- ethylbenzene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
- B01D53/85—Biological processes with gas-solid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7027—Aromatic hydrocarbons
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Oil, Petroleum & Natural Gas (AREA)
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- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to the field of bio-filter technology cleaning organic waste gas, discloses a kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin.This method is inoculated with using activated sludge to bio-trickling filter, the acclimated microorganism under the ethylbenzene exhaust gas conditions of low concentration, after the completion of domestication, saponin is introduced in the nutrient solution of supply experimental group, experimental result, which can obtain saponin, can promote degradation rate of the ethylbenzene waste gas in bio-trickling filter.When the saponin concentration of introducing is in the range of 15~75mg/L, to ethylbenzene waste gas (250~2000mg/m of each concentration range3) removal have and largely strengthen effect.The present invention can largely improve degradation property of the bio-trickling filter to ethylbenzene waste gas on the premise of any operating condition and device is not changed；The present invention selects saponin as additive, good with the compatibility of environment to the small toxicity of degrading microorganism.In addition, also having, anti-load impact, operating cost is low, simple operation and other advantages.
Description
Technical field
The invention belongs to bio-filter technology cleaning organic waste gas field, is related to bio-trickling filter to hydrophobic organic exhaust gas
Intensive treatment method, specifically using biosurfactant saponin improve bio-trickling filter ethylbenzene in waste gas is gone
Except effect.
Background technology
Volatile organic contaminant (volatile organic compounds, VOCs) is in various industrial processes
Essential a kind of industrial chemicals, such as：The too busy to get away VOCs such as pharmacy industry, Chemical Manufacture, PETROLEUM PROCESSING.However, due to this
Class material has certain volatility, and most of to discharge in gaseous form, it is unfavorable that environment and the ecosystem are all generated
Influence, certain threat is caused to the health of the mankind.VOCs harm has caused the extensive concern of the public, and various countries also fall over each other
Formulate a series of law, regulation, instruction control VOCs to discharge.Ethylbenzene is that a kind of having for difficult degradation is certain hydrophobic
VOCs, there is fat-solubility, low toxicity, it is volatile the features such as, easily caused to be poisoned in humans and animals suction body.Therefore need badly and take
A kind of its discharge of effective technical controlling.
At present, bioanalysis is a kind of putative relatively inexpensive, environment-friendly, stable performance and the VOCs that can effectively degrade
Method.Biofilter is a kind of conventional bioanalysis degraded VOCs device, but to hydrophobicity VOCs such as ethylbenzene, n-hexane
Degraded all there is certain limitation.In recent years, Many researchers both domestic and external are devoted to improve hydrophobicity organic exhaust gas
Biodegradable, mainly have addition surfactant, using two-phase bioreactor, inoculated fungi as function bacterium, in advance
Processing-biofiltration combined degradation etc..Wherein, strengthen the degraded of organic exhaust gas using surfactant, mainly utilize surface
The existing water-wet side of activating agent has hydrophobic side again, has certain compatibility to the organic component of fat-solubility, can to water solubility compared with
Low target contaminant has certain solubilization, reaches the biodegradable for improving hydrophobicity organic exhaust gas.
Surfactant is divided into chemical surfactant and biosurfactant, and chemical surfactant is by successfully
Applied to enhanced biological filter degraded hydrophobicity organic exhaust gas, however, biosurfactant is currently limited to be applied to soil
During earth is repaired.Biosurfactant has certain compatibility to the organic component of fat-solubility, to water solubility compared with
Low target contaminant has certain solubilization.In addition, compared with chemical surfactant, biosurfactant is to micro-
The toxicity of biology is smaller, has good compatibility with environment.Saponin is a kind of surface extracted in legume
Activating agent, cheap, smaller to the toxicity of microorganism, the solubilization to hydrophobicity organic exhaust gas is optimistic, in soil remediation
Middle application is relatively broad, and less, the enhancing degradation mesh particularly to ethylbenzene waste gas is applied in bioanalysis degraded waste gas technical field
Preceding and beyond example.
The content of the invention
The technical problem to be solved in the present invention is：A kind of bio-trickling filter that improves is provided in view of the shortcomings of the prior art to remove
The method of hydrophobicity ethylbenzene waste gas.
In order to solve the above technical problems, the skill of enhanced biological trickling filter purification hydrophobicity ethylbenzene waste gas provided by the invention
Art, the step are as follows：After being pre-processed to the activated sludge that sewage treatment plant fetches, by standby filler polyurethane sea
Silk floss is soaked in sludge, is aerated 24-48h, microorganism is attached on filler and grow, that is, completes the biofilm of filler；Hereafter, will be attached
The filler for having microorganism is placed in bio-trickling filter, assembling reactor, and after check device air-tightness, configuration nutrient solution is to filler
Uniformly sprayed, and be passed through the ethylbenzene waste gas of low concentration, the microorganism on filler is tamed under the conditions of this, clearance
Reach preferable removal effect and stably, that is, complete the domestication of microorganism；Continue to increase ethylbenzene exhaust gas concentration to setting concentration, treat
After bio-trickling filter is stable under this concentration ethylbenzene exhaust environment, surfactant of the configuration with finite concentration scope,
Added in inorganic nutrient solution, it is evenly distributed on nutrient solution by spray equipment on bed filler.In this waste gas purification
During, microorganism is translated into nontoxic using ethylbenzene waste gas as sole carbon source by the metabolism of microorganism
Small molecule, so as to complete the removal to hydrophobicity ethylbenzene waste gas.
Surfactant applied in the above method is biosurfactant saponin, the control of its concentration 15~
75mg/L.The concentration range of ethylbenzene waste gas is 250~2000mg/m3.The spray flux of nutrient solution is 4~15L/d, spray the cycle be
Every 2~3min, 1~7s is sprayed.
Residence time of the ethylbenzene waste gas in bio-trickling filter is 8~64s.
The advantage of the invention is that：The present invention has very strong anti-load impact, in all operating conditions with contrast groups
With the specification of bio-trickling filter all as under conditions of, the present invention, and can by adding biosurfactant in nutrient solution
Obvious enhanced biological trickling filter degradation property, the removal capacity of hydrophobicity ethylbenzene waste gas is improved, and, biosurfactant is to drop
The toxicity of solution microorganism is smaller, and Environmental compatibility is preferable.Present invention operation is extremely simple, and operating cost is low, and stable.
Embodiment：Specific embodiment is described in further details to the present invention below.
Embodiment：Device used in the present invention is the identical Organic glass column of specification, specific as follows：Internal diameter is 0.1m
A height of 0.78m hollow cylinder；Share as 4 layers of filler, interval height 0.5m between every layer, and separated by latticed sieve plate
And support filler；Selected filler is the cylindric polyurethane sponge filler with space, filler a diameter of 0.1m, a height of
0.1m, its aperture are 10PPI, porosity 95.3%, density 28kg/m3.Ethylbenzene vapor and the air with certain humidity
Mixing is entered by the top of reactor, from top to bottom penetrates into whole bed.Nutrient solution is from top of the pillar by spray equipment to sprinkling
Whole upper strata filler surface.
The fresh activity sludge of the invention institute microbe inoculation is taken from the aerobic of Changsha City, Hunan Province Yue Lu sewage treatment plants
Pond.After sludge is fetched, by sieving twice, the solid impurity of larger particles is filtered off, standby filler is then immersed in sludge
In, 24-30h is aerated, during which filler is stirred up and down every 8h or so, treats that microorganism has been attached on filler, i.e. complete filler
Biofilm；Then what is taken is placed in two specification identical devices, attachment means, and the air-tightness of check device, meanwhile, by ethylbenzene
The inlet concentration of waste gas is adjusted to 250mg/m3, its residence time in bio-trickling filter is 50s, and the spray flux of nutrient solution is
4.9L/d, spray time is that 3s is sprayed per 2min, after running 5 days on this condition, by stop of the ethylbenzene waste gas in bio-trickling
Time foreshortens to 35s.97% is may be up to by the clearance of 21 days or so ethylbenzene waste gas, clearance stablizes left and right 5 days herein, and
Reactor internal drop is stable, and the microorganism for having yellow-white above filler generates, then indicates that bio-trickling filter starts successfully, micro- life
Thing domestication terminates.
The concentration of ethylbenzene waste gas is adjusted to 500~800mg/m3, the spray equipment for adjusting nutrient solution make it that spray flux is 8L/
D, often 2min spray 6s.With device group as a comparison, another is as experimental group.Treat bio-trickling filter in this concentration
Under ethylbenzene exhaust environment it is stable after, it adds a certain amount of saponin in nutrient solution in experimental group so that its concentration
For 40mg/L, clearance reaches stable two days later, plant running 10 days, and its numerical value averagely removes capacity and reached 94% or so
To 84.98g/ (m3·h)；The average removal efficiency for contrasting the ethylbenzene waste gas of post only has 70% or so, averagely removes capacity
65.38g/(m3·h)。
It can be seen from above-described embodiment that the addition of biosurfactant saponin improves bio-trickling filter to dredging
The removal capacity of water-based ethylbenzene gas, clearance incrementss are up to nearly 24%, and can long-time steady operation.
Above is patent preferred embodiment of the present invention, protection scope of the present invention are not limited merely to above-described embodiment,
The present invention essential scope in carry out any improvement, replace process program in protection scope of the present invention.
Claims (8)
1. a kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin provided by the invention, is specifically included as follows
Step：
Step a：After bio-trickling filter inoculation of activated-sludge, the ethylbenzene waste gas of low concentration is passed through, regulation and control ethylbenzene waste gas drips in biology
Residence time in filter, the parameter of spray equipment is set, nutrient solution is sprayed to filler surface, starts acclimated microorganism, it is raw
After the thing trickling filter operation a few days, shorten residence time of the ethylbenzene waste gas in bio-trickling filter, continue acclimated microorganism.
Step b：After the completion of microbial acclimation, continue to increase the concentration of ethylbenzene waste gas, control ethylbenzene waste gas is in bio-trickling filter
Residence time, after bio-trickling filter is stable, add certain density saponin in nutrient solution, spray equipment be set
Parameter, uniformly spray is on bed filler for the nutrient solution containing saponin, and bio-trickling filter continuous service under these conditions is complete
The purification of paired ethylbenzene waste gas.
2. a kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin according to claim 1, it is special
Sign is：The parameter of spray equipment described in step a, including nutrient solution spray flux and spray the cycle, wherein spray flux be 4~
9L/d, spray cycle are that 1~3s is sprayed per 2min.
3. a kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin according to claim 1, it is special
Sign is：In step a, the scope of the ethylbenzene waste gas of low concentration is 200~300mg/m3。
4. a kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin according to claim 1, it is special
Sign is：In step a, bio-trickling filter operation a few days after, refer to microorganism start domestication from the 4th~6 day.
5. a kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin according to claim 1, it is special
Sign is：In step a, when microorganism starts domestication, residence time of the ethylbenzene waste gas in bio-trickling filter is 40~60s, fortune
In the future, shorter residence time of the ethylbenzene waste gas in bio-trickling filter is 20~40s to line number.
6. a kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin according to claim 1, it is special
Sign is：In step b, ethylbenzene concentration is 250~2000mg/m3, residence time of the ethylbenzene waste gas in bio-trickling filter be 8~
64s。
7. a kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin according to claim 1, it is special
Sign is：In step b, nutrient solution spray flux is adjusted to 8~15L/d, and the spray cycle is that 5~7s is sprayed per 2min.
8. a kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin according to claim 1, it is special
Sign is：In step b, the concentration of the saponin is controlled in 15~75mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710509794.8A CN107837674A (en) | 2017-06-28 | 2017-06-28 | A kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710509794.8A CN107837674A (en) | 2017-06-28 | 2017-06-28 | A kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin |
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| CN107837674A true CN107837674A (en) | 2018-03-27 |
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| CN201710509794.8A Pending CN107837674A (en) | 2017-06-28 | 2017-06-28 | A kind of method that bio-trickling filter purification ethylbenzene waste gas is improved using saponin |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237697A (en) * | 2019-06-12 | 2019-09-17 | 河北科技大学 | A kind of device of biological cleaning exhaust gas |
| CN110237695A (en) * | 2019-05-05 | 2019-09-17 | 广西霸普环保科技有限公司 | A kind of exhaust-gas treatment biomembrane and preparation method thereof |
| CN110813076A (en) * | 2019-10-11 | 2020-02-21 | 广东省南方环保生物科技有限公司 | Organic waste gas biological treatment method and device |
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| KR100479631B1 (en) * | 2001-04-20 | 2005-03-30 | 큐바이오텍 (주) | Biofilter apparatus equipped with inlet load equalizer for the removal of volatile organic compounds |
| CN103170238A (en) * | 2013-03-05 | 2013-06-26 | 浙江工商大学 | Method for enhancing high-concentration ethylbenzene waste gas treatment by using biological trickling filter |
| CN103463968A (en) * | 2013-09-29 | 2013-12-25 | 浙江工商大学 | Method for improving processing of high-load n-hexane waste gas by biotrickling filter |
| CN103816797A (en) * | 2014-03-10 | 2014-05-28 | 北京工业大学 | Method for enhancing biodegradation of hydrophobic methylbenzene |
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2017
- 2017-06-28 CN CN201710509794.8A patent/CN107837674A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100479631B1 (en) * | 2001-04-20 | 2005-03-30 | 큐바이오텍 (주) | Biofilter apparatus equipped with inlet load equalizer for the removal of volatile organic compounds |
| CN103170238A (en) * | 2013-03-05 | 2013-06-26 | 浙江工商大学 | Method for enhancing high-concentration ethylbenzene waste gas treatment by using biological trickling filter |
| CN103463968A (en) * | 2013-09-29 | 2013-12-25 | 浙江工商大学 | Method for improving processing of high-load n-hexane waste gas by biotrickling filter |
| CN103816797A (en) * | 2014-03-10 | 2014-05-28 | 北京工业大学 | Method for enhancing biodegradation of hydrophobic methylbenzene |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237695A (en) * | 2019-05-05 | 2019-09-17 | 广西霸普环保科技有限公司 | A kind of exhaust-gas treatment biomembrane and preparation method thereof |
| CN110237697A (en) * | 2019-06-12 | 2019-09-17 | 河北科技大学 | A kind of device of biological cleaning exhaust gas |
| CN110237697B (en) * | 2019-06-12 | 2021-10-08 | 河北科技大学 | Biological waste gas purifying device |
| CN110813076A (en) * | 2019-10-11 | 2020-02-21 | 广东省南方环保生物科技有限公司 | Organic waste gas biological treatment method and device |
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