CN108273380B - For improving the growth-promoting flora and waste gas processing method of exhaust treatment efficiency - Google Patents
For improving the growth-promoting flora and waste gas processing method of exhaust treatment efficiency Download PDFInfo
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- CN108273380B CN108273380B CN201810151504.1A CN201810151504A CN108273380B CN 108273380 B CN108273380 B CN 108273380B CN 201810151504 A CN201810151504 A CN 201810151504A CN 108273380 B CN108273380 B CN 108273380B
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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
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- 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
- B01D53/48—Sulfur compounds
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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
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
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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
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
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- 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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Abstract
The present invention relates to waste gas purification fields, and in particular to for improving the growth-promoting flora and waste gas processing method of exhaust treatment efficiency.Provided by the present invention for improving the growth-promoting flora of exhaust treatment efficiency, the Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and the colloid bacillus cereus that are 0.9-1.1:0.8-1.0:0.9-1.1:2.7-3.5 including mass ratio.The growth-promoting flora does not participate in contaminant degradation directly, but the growth and breeding that directly participate in the target flora mixture of contaminant degradation can be promoted, it maintains target flora mixture in higher level always to the metabolic capability of pollutant, 99.8% or more is up to the treatment effeciency of industrial waste gas.
Description
Technical field
The present invention relates to waste gas purification fields, and in particular at the growth-promoting flora and exhaust gas for improving exhaust treatment efficiency
Reason method.
Background technique
In recent years, environmental problem gets more and more people's extensive concerning, and the harm of organic exhaust gas has become current common recognition, administers
Organic Waste Gas Pollution is one of emphasis of efforts at environmental protection.Organic exhaust gas is that petrochemical industry, rubber, plastics, coating, printing etc. are numerous
Generated exhaust gas in industry production process, containing toxic pollutant substance, is greatly its main feature is that quantity is larger
Volatile organic matter (VOCs), content of organics fluctuation is big, has combustibility, distributes stench and to human health.
Currently, there are two main classes for the administering method of organic exhaust gas: one kind is absorption method, by physical method, certain
Under temperature and pressure, with the method for selective absorbent and permoselective membrane etc. come separation of VOCs, mainly
Active carbon adsorption, condensation method, pressure swing adsorption method and biofilm etc..Another kind of is null method, anti-by chemistry or biology
It answers, using light, heat, catalyst and microorganism etc., organic matter is converted to carbon dioxide and water, mainly include light decomposition method, heat
Oxidizing process, catalysis burning, bioanalysis, corona method, plasma decomposition etc..Wherein bioanalysis is that recent decades grow up
A kind of new waste gas pollution control and treatment technology, its biggest characteristic is that operating cost is low, it is without secondary pollution, it being capable of efficient process low concentration strong wind
The pollution sources of amount.Its principle is that odorant is decomposed into carbon dioxide and water or other using the microorganism after domestication
Easy regenerant, achievees the purpose that air cleaning.Pollutant is changed into certainly by microorganism during oxygenolysis polluter
Body nutrients, is constantly bred.
The technique of Biochemical method exhaust gas mainly includes zinc cation method, biofiltration process and three kinds of biological island,
Middle biological island is a kind of energy-efficient waste gas treatment process, and quickly, engineer application number was in recent years for development speed
Increase year by year.Bio-trickling device is generally made of spraying layer, packing layer, reservoir bed, bacterium solution tank, water pump, ventilation equipment.Pollution
Gas is sent into packing layer by air blower, and the poisonous and harmful component in air-flow is absorbed by the moisture film on packing layer, and is transmitted to and is filled out
The biomembrane adhered on the bed of material, finally by the microorganism decomposition in biomembrane.
Existing bio-trickling device takes up a large area, only preferable to the clean-up effect of low concentration gas, only up to locate
The exhaust gas that entrance concentration is 183ppm is managed, and can only achieve qualified standard in the gas of exit discharge, can be used for municipal administration
The processing of exhaust gas, but for the industrial waste gas of high concentration, existing bioanalysis are not met by exhaust gas and largely handle and green
The demand that colour circle is protected.In the decade-long time, researchers attempt micro- to improve by the DNA structure for changing desulfurization bacterium
Biological exhaust treatment efficiency, however its result is all unsatisfactory, the change of desulfurization bacterium gene structure can not effectively improve bacterium
The exhaust-gas treatment ability of group.Therefore, it is necessary to further develop the bioanalysis for capableing of efficient process high-concentration waste gas, passed through in development
While Ji, preserves the ecological environment and be not damaged.
Summary of the invention
In order to solve the problems, such as that existing bioanalysis exhaust treatment efficiency is low, degree of purification is not high enough, the present invention is provided to
Improve exhaust treatment efficiency growth-promoting flora, bacteria bed and waste gas processing method, can be realized high-concentration waste gas without dirt
Dye, low cost, high efficiency processing.
The claimed technical solution of the present invention is as follows:
For improving the growth-promoting flora of exhaust treatment efficiency, which is characterized in that including mass ratio be 0.9-1.1:0.8-
Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and the colloid bacillus cereus of 1.0:0.9-1.1:2.7-3.5.
Preferably, the mass ratio of the Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and colloid bacillus cereus is 1:1:1:3.
A kind of bacteria bed for exhaust-gas treatment, which is characterized in that the microorganism adhered to comprising filler and filler surface
Film, the microbial film are after being mixed by target flora mixture with the growth-promoting flora for improving exhaust treatment efficiency
Manufactured bacterium solution is formed in filler surface by bio-film colonization；
The target flora mixture refers to the flora mixture for handling exhaust gas.
Preferably, the mass ratio of the target flora mixture and the growth-promoting flora is 7-8:1-1.5.
Preferably, the filler is by volcanic rock particle, the wooden unit comprising volume ratio for 0.7-1.3:0.7-1.3:0.4-0.6
It is made with the raw material of raw shell.
Preferably, the preparation method of the volcanic rock particle includes: pickling to be carried out in weak acid solution, then washed with clear water
Only, natural air drying；Then alkali cleaning is carried out in weak caustic solution, then is cleaned with clear water, natural air drying；It is finally stifling with high steam
Volcanic rock removes volcanic rock salts substances remained on surface, the volcanic rock particle that screening partial size is 10~20mm；
The preparation method of the wooden unit includes: to carry out machinery to wooden unit to smash, and chooses the wooden unit that partial size is 8~16cm, uses
High pressure rushes rifle impact, improves structure porosity to 60-75%；
The preparation method of the raw shell includes: to clean raw shell with clear water, is smashed after drying, and selection partial size is 5~8cm
Life shell；
The volcanic rock particle prepared, wooden unit and raw shell are obtained into filler after mixing.
Preferably, in the preparation method of the volcanic rock particle, the weak acid is the nitric acid or sulfuric acid solution of pH4-6, acid
Washing the time is 3-5 minutes；The weak base is the sodium hydroxide or potassium hydroxide solution of pH8-10, and the alkali cleaning time is 3-5 minutes；Institute
Stifling refer to of high steam is stated to fumigate volcanic rock 2-3 minutes in the steam of 5M-10M pa；
In the preparation method of the wooden unit, the high pressure is rushed described in the hydraulic pressure impact that rifle impact refers to using 350M-400M pa
Wooden unit 5-10 seconds.
A kind of emission-control equipment, which is characterized in that include any bacteria bed for exhaust-gas treatment.
The growth-promoting flora or any biological filter for exhaust-gas treatment for improving exhaust treatment efficiency
The application of bed or the emission-control equipment in exhaust-gas treatment.
A kind of waste gas processing method, which is characterized in that using any described bacteria bed or institute for exhaust-gas treatment
The emission-control equipment stated carries out exhaust-gas treatment.
Preferably, the exhaust gas includes benzene, toluene, ethylbenzene, hydrogen sulfide, carbon disulfide and/or ammonia.
Inventor chances on some floras for not participating in contaminant degradation directly under study for action can promote directly to participate in
The growth and breeding of the flora of contaminant degradation, to improve the degradation efficiency of exhaust emission, these do not participate in pollution directly
The flora of object degradation is referred to as growth-promoting flora.By further bacterial screening, obtaining can be significantly improved at exhaust gas biology
The growth-promoting flora for managing efficiency, it includes Bifidobacterium Bifidum, lactic acid that mass ratio is 0.9-1.1:0.8-1.0:0.9-1.1:2.7-3.5
Bacterium, actinomyces and colloid bacillus cereus.
Provided by the present invention for the bacteria bed of exhaust-gas treatment, by target flora mixture and growth-promoting provided by the invention
Bacterium solution is made after flora mixing, stable biomembrane is formed in filler surface by the method for bio-film colonization, for continuous, high
Effect steadily handles exhaust gas.The target flora mixture be refer to degradation exhaust gas in pollutant (for example, benzene, toluene, second
Benzene, hydrogen sulfide, carbon disulfide and/or ammonia) flora mixture.The present invention does not have special want to the target flora mixture
It asks, those skilled in the art can screen from associated sample according to conventional bacterial screening method and obtain, for example, acquisition chemical industry
The neighbouring humus soil sample of factory obtains capable of degrading the flora mixture of volatile organic compounds through laboratory separation screening.
The mass ratio of the target flora mixture and growth-promoting flora is preferably 7-8:1-1.5.Growth-promoting flora and object bacteria
The one-way or bi-directional promotion growth of group's mixture, enhances the activity of target flora mixture, improves target flora mixture
Proliferative speed makes the rate of contaminant degradation under identical contact area improve 5~10 times, is capable of handling entrance concentration and is up to
12000-15000mg/m3Exhaust gas, treatment effeciency is up to 99% or more (treatment effeciency=(entrance detected value-dirt of pollutant
Contaminate object outlet detected value)/pollutant entrance detected value).Exhaust-gas treatment is carried out using bacteria bed of the invention, substantially
Without additional Additional nutrient solution, high temperature resistant and soda acid can handle multiple pollutant simultaneously, convert solid phase, nothing for pollutant
Secondary pollution.
In a preferred embodiment, after the target flora mixture is mixed with growth-promoting flora, by domestication in about 30 days
Culture, makes flora adapt to the living environment of pure sewage completely, is then formulated for the bacterium solution of bio-film colonization.Bacterium solution is sprayed repeatedly
On filler, filler surface is made to adhere to uniform biomembrane.From domestication culture to bio-film colonization, whole process is only needed 35-40 days,
The biomembrane of high activity can be obtained.Preferably, domestication incubation in, control culture medium dissolved oxygen concentration be 0.3~
0.8mg/L, pH are 4~8, to cultivate the strain for possessing higher tolerance.In the bacterium solution for being formulated for bio-film colonization, control training
0.4~0.5mg/L of dissolved oxygen concentration of base is supported, pH value is 6.5~7.5, provides optimal culture conditions for culture propagation.
The affinity of active biological film and exhaust gas in bacteria bed of the invention is strong, and exhaust gas is upward from bacteria bed bottom
During bacteria bed, the pollutant in exhaust gas can be by the biomembrane efficient absorption of filler surface and degradation, at this
The absorption efficiency for not needing to dissolve industrial waste gas using a large amount of water during a to improve biomembrane to pollutant, need to only make a living
Moisture necessary to the sprinkling of object film is lived, has not only saved water resource, has also reduced energy consumption.
Commercially available filler or homemade filler can be used in bacteria bed of the invention.Inventor sends out by long-term research
Existing, the filler made of the raw material comprising volcanic rock particle, wooden unit and raw shell can be improved exhaust treatment efficiency, the volcano
The volume ratio of rock particle, wooden unit and raw shell is 0.7-1.3:0.7-1.3:0.4-0.6.The porosity of volcanic rock is high, specific surface
Product is big, is capable of increasing the contact area of exhaust gas and biomembrane；Its flourishing hole makes to form anaerobic environment inside filtrate, makes anaerobism
Flora is also able to maintain more strongly active, while handling multiple pollutant；Compared with common filler haydite, volcanic rock is also used as
Microbial activity is improved in the microelement source of biomembrane.Wooden unit provides carbon source, preferably pine wooden unit for biomembrane.Raw shellfish
Shell is rich in calcium carbonate, can not only be used for the alkalinity source of biofilm carrier and nitration reaction, during exhaust gas treatment to biology
The pH of film is finely adjusted, and pH is made to maintain 6.5~7.5 always, and target flora mixture and growth-promoting flora is made to remain height
Activity.
In a preferred embodiment, volcanic rock activates inside volcanic rock through overpickling, alkali cleaning, high temperature and high pressure sequential processes
Ingredient improves its intensity, prevents from occurring the phenomenon that volcanic rock crushing in use process and influencing exhaust-gas treatment effect.Pickling can be with
Using mono-acid or Compound-acid, the weak acid for pickling is preferably sulfuric acid, is also possible to nitric acid.Weak base for alkali cleaning is preferably hydrogen
Potassium oxide is also possible to sodium hydroxide.Wooden unit rushes rifle impact by high pressure, improves porosity, increases specific surface area.By processing
Filling intensity it is high, strong shock resistance, high temperature high voltage resistant, acid and alkali-resistance, porosity is high, and large specific surface area improves at exhaust gas
Manage efficiency.
Waste gas processing method provided by the invention, using any described bacteria bed for exhaust-gas treatment or described useless
Flash Gas Compression Skid System carries out exhaust-gas treatment.During exhaust gas treatment, by exhaust gas adjusting to saturated humidity, temperature is adjusted to 15~35
℃；Make exhaust gas from bacteria bed bottom upwardly through bacteria bed, the pollutant in exhaust gas is attached to biological form membrane to be filled out
Expect that the flora on surface is absorbed and decomposed, be converted into harmless substance, in this process, continues to spray tap water to bacteria bed
Or middle water, provide life required moisture content for biomembrane；Purified gas is finally discharged.
To sum up, waste gas processing method of the invention has the advantage that (1) treatment effeciency compared with existing bioanalysis
It is high: 99.8% or more is up to the treatment effeciency of industrial waste gas；(2) stability is strong: growth-promoting flora promotes target flora mixture
Growth and breeding, maintain target flora mixture in higher level always to the metabolic capability of pollutant, exhaust-gas treatment
Efficiency will not be reduced rapidly because the time elapses；(3) low energy consumption: without largely dissolving industrial waste gas with water, reducing energy consumption.
Detailed description of the invention
The structural schematic diagram of Fig. 1 emission-control equipment；
Wherein, 1- bacteria bed region case, 2- bacteria bed, 3- gas collection pipeline, 4- biological treating equipment case, 5- are pre-
Processing region, 6- humidify spray equipment, 7- exhaust tube.
Specific embodiment
Below in conjunction with specific embodiment, the invention will be described in further detail, it is to be understood that following embodiments are only
As explanation and illustration of the invention and explanation, do not limit the scope of the invention.
Biomaterial
Bifidobacterium Bifidum: it buys from Su Zhoubei Na Chuanlian Bioisystech Co., Ltd, strain number BNCC106791；
Lactic acid bacteria: it buys from Su Zhoubei Na Chuanlian Bioisystech Co., Ltd, strain number BNCC106785；
Actinomyces: it buys from Su Zhoubei Na Chuanlian Bioisystech Co., Ltd, strain number BNCC336944；
Colloid bacillus cereus: it buys from Su Zhoubei Na Chuanlian Bioisystech Co., Ltd, strain number BNCC335819.
Also there is preservation in this laboratory of above-mentioned strain, the Applicant declares that can freely send out to the public in 20 years from the applying date
It puts for necessary confirmatory experiment.It should be understood that realization of the invention is not rely on representated by above-mentioned bacterial strains number
Strain, one or more other strains that Bifidobacterium Bifidum, lactic acid bacteria and actinomyces can choose same Pseudomonas are replaced, colloid
Other bacterial strains that bacillus can choose same strain are replaced, and bacterial strain, which is not used in, provided herein limits guarantor of the invention
Protect range.
Consumptive material
Volcanic rock: Tengchong In Yunnan Province is picked up from；
Wooden unit: the pine of Changbai mountain, Jilin is picked up from；
Raw shell: East Sea coastal area is picked up from；
Haydite: it buys from Yongzhou City, Hunan Province Xiang Yue haydite factory.
In following embodiment, not specified biological chemical reagent is this field conventional reagent, can be according to this field
Conventional method prepare and or it is commercially available, specification be the pure grade in laboratory；Not specified consumptive material is that this field is normal
Consumptive material is advised, finished product can be bought in shop or commission manufacturer is customized.
The preparation of 1. growth-promoting flora of embodiment
Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and colloid bacillus cereus are uniformly mixed according to following mass ratio, obtain growth-promoting
Flora.
No. 1 growth-promoting flora:
Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and colloid bacillus cereus mass ratio be 1:1:1:3.
No. 2 growth-promoting floras:
Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and colloid bacillus cereus mass ratio be 1.1:0.8:1.1:2.7.
No. 3 growth-promoting floras:
Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and colloid bacillus cereus mass ratio be 0.9:1.0:0.9:3.5.
The compliance test result of 2. growth-promoting flora of embodiment raising exhaust treatment efficiency
1. prepared by the flora for exhaust-gas treatment
(1) target flora mixture is screened
A. certain chemical plant humus soil sample 10g nearby is acquired, it is mixed with the sterile trade effluent of factory 100ml pH4-7
It is even, it is taken out after 30-45 DEG C, 150r/min shake culture 48h.
B. 10ml culture solution is drawn in superclean bench to be inoculated in 90ml fresh sterile trade effluent, at 30-45 DEG C,
It is taken out after 150r/min shake culture 48h.Repeat aforesaid operations three times, the microorganism of enrichment degradation volatile organic compounds.
D. the bacterium solution 1ml after enrichment is drawn with Sterile pipette, be put into the test tube for filling 9ml sterile water, concussion is uniform
Afterwards, bacterium solution and other 9ml sterile water mixed diluting after wherein taking 1ml dilution, are so repeated as many times, bacterium solution are diluted to 10-1,
10-2, 10-3, 10-4, 10-5, 10-6The dilution of gradient concentration.Take 10-4, 10-5, 10-6Each 0.2ml of the dilution of three concentration,
It is respectively coated on the agar plate made of sterile trade effluent, after placing 2h at room temperature, 30-45 DEG C of inversion culture.48-
Occur circular protrusions shape petite (diameter 1mm or so) after 72h, on plating medium.Single colonie is provoked with toothpick, is inoculated into
In test tube equipped with the sterile trade effluent of 10ml, gauze sealing culture, until liquid becomes milky turbidity bacterium solution in test tube.Weight
The multiple above operation three times, is isolated and purified repeatedly, obtains target flora mixture.
Realization of the invention is not rely on the target flora mixture screened by the above method, art technology
The flora for the exhaust emission that can degrade that personnel obtain according to screening technique known in the art is suitable for the present invention.
(2) the target flora mixture that screening obtains and the growth-promoting flora that embodiment 1 is prepared are mixed according to following mass ratio
It closes, obtains the flora for exhaust-gas treatment:
No. 1 processing flora: target flora mixture is mixed with No. 1 growth-promoting flora according to the mass ratio of 8:1；
No. 2 processing floras: target flora mixture is mixed with No. 1 growth-promoting flora according to the mass ratio of 7:1.5；
No. 3 processing floras: target flora mixture is mixed with No. 2 growth-promoting floras according to the mass ratio of 8:1；
No. 4 processing floras: target flora mixture is mixed with No. 2 growth-promoting floras according to the mass ratio of 7:1.5；
No. 5 processing floras: target flora mixture is mixed with No. 3 growth-promoting floras according to the mass ratio of 8:1；
No. 6 processing floras: target flora mixture is mixed with No. 3 growth-promoting floras according to the mass ratio of 7:1.5；
No. 7 processing floras: only including target flora mixture, as a control group flora.
2. domestication culture
(1) prepare culture medium
It prepares nutrient solution: including the following substance of mass volume ratio: 3% starch, 3% glucose, 1% peptone, 0.1%
Magnesium sulfate, 0.1% calcium carbonate, 0.05% potassium dihydrogen phosphate and 0.01 ‰ Zn2+/Mn2+/Cu2+.The nutrient solution can satisfy mesh
Nutriment needed for marking flora mixture and growth-promoting flora growth and breeding.
No. 1 culture medium: it is mixed by nutrient solution and chemical plant sewage by the volume ratio of 5:1；
No. 2 culture mediums: it is mixed by nutrient solution and chemical plant sewage by the volume ratio of 4:1；
No. 3 culture mediums: it is mixed by nutrient solution and chemical plant sewage by the volume ratio of 3:1；
No. 4 culture mediums: it is mixed by nutrient solution and chemical plant sewage by the volume ratio of 2:1；
No. 5 culture mediums: it is mixed by nutrient solution and chemical plant sewage by the volume ratio of 1:1；
No. 6 culture mediums: chemical plant sewage.
By prepared culture medium in 121 DEG C of high-temperature sterilization 15min, it is cooled to room temperature.
(2) 1~No. 7 processing flora prepared to step 1 carries out domestication culture respectively, and steps are as follows:
Flora is inoculated into No. 1 culture medium, oxygen is passed through, control the dissolved oxygen concentration of No. 1 culture medium 0.3~
0.8mg/L, pH are 4~8, and temperature is 20~35 DEG C, use low-speed agitator stir culture base, revolving speed 30r/min.Check bacterium
Bacterium solution is inoculated into No. 2 according to the volume ratio of 1:10 after flora growth is stablized (OD600 is 0.4~0.6) by group's growing state
In culture medium, condition of culture is identical as when cultivating in No. 1 culture medium.Aforesaid operations are repeated, No. 3 culture mediums, No. 4 are successively used
Culture medium, No. 5 culture mediums, No. 6 culture mediums carry out domestication culture to flora, and the incubation time in every kind of culture medium is no less than 2
It.By gradually increasing concentration of wastewater, reduces nutrition liquid proportional, sewage is finally made to become the unique nutrient source of flora.It is entire to tame and docile
Change process needs 30d or so.
3. prepared by bacterium solution
The bacterium solution for bio-film colonization is prepared respectively using 1~No. 7 processing flora for completing domestication in step 2, and step is such as
Under:
Use trade effluent and a small amount of glucose, swill mixing as culture medium, wherein trade effluent accounts for culture volume
70%.Prepared culture medium is cooled to room temperature after 121 DEG C of high-temperature sterilization 15min, and the flora of domestication is completed in inoculation.Control
The dissolved oxygen concentration of culture medium is 0.4~0.5mg/L, and pH is 6.5~7.5, and temperature is 20~35 DEG C, is stirred using low-speed agitator
Mix culture medium, revolving speed 30r/min.It is cultivated by 5~7d, bacterium solution is in faint yellow half thick liquid, that is, is prepared successfully.
1~No. 7 bacterium solution is obtained, 1~No. 7 processing flora is respectively corresponded.
4. bio-film colonization
(1) using volcanic rock, wooden unit and raw shell as raw material, filler is made as follows:
The processing of volcanic rock: pickling 3-5 minutes in the sulfuric acid solution of pH4-6, then clean, the natural air drying with clear water；So
Afterwards alkali cleaning 3-5 minutes in the potassium hydroxide solution of pH8-10, then clean, the natural air drying with clear water；Finally in 5M-10M pa
It is fumigated volcanic rock 2-3 minutes in high steam, removes volcanic rock salts substances remained on surface, screening partial size is 10~20mm's
Volcanic rock particle.
The processing of wooden unit: machinery is carried out to wooden unit and is smashed, is sieved after smashing, selection partial size is 8-16cm, with a thickness of 3-5cm
Wooden unit.Then rifle is rushed with the high pressure of 350M-400M pa to impact wooden unit 5-10 seconds, improve structure porosity to 60-75%.
The processing of raw shell: raw shell is cleaned with clear water, smashes, is sieved after drying, chooses the raw shellfish that partial size is 5-8cm
Shell.
Volume of the volcanic rock particle, wooden unit that processing is obtained with raw shell according to 0.7-1.3:0.7-1.3:0.4-0.6
Than being uniformly mixed, filler is obtained.
(2) filler obtained is respectively charged into 7 bacteria bed region casees, without compressing, is uniformly mixed.It is packed into
The determination method of packing volume in the case of bacteria bed region: packing volume Am3, exhausted air quantity Bm3/ s (must be by m3/ h is changed
Calculating is m3/ s), A/B=C, it is necessary to meet 20s≤C≤30s.1~No. 7 bacterium solution is respectively adopted and prepares bacteria bed, steps are as follows:
It is sprayed at bacterium solution iterative cycles and uniformly on the filler being previously charged into the case of bacteria bed region by water pump, by 5~7 days
Debugging, so that filler surface is adhered to uniform active biological film.1~No. 7 bacteria bed is obtained, 1~No. 7 processing bacterium is respectively corresponded
Group.
5. the detection of exhaust treatment efficiency
Exhaust gas to be processed is handled with emission-control equipment shown in FIG. 1.
The emission-control equipment includes gas collection pipeline 3 and biological treating equipment case 4；The biological treating equipment case
4 include the bacteria bed region case 1 that bacteria bed 2 is housed for the pretreated pretreatment zone 5 of exhaust gas and bottom；It is described
Gas collection pipeline 3 and the pretreatment zone 5 are in fluid communication, the pretreatment zone 5 and bacteria bed region case 1
Bottom is in fluid communication；The side wall of the pretreatment zone 5 is equipped with humidification spray equipment 6, will for spraying tap water or middle water
Exhaust gas is adjusted to saturated humidity；The top of bacteria bed region case 1 is equipped with humidification spray equipment 6, is used for bacteria bed 2
Tap water or middle water are sprayed, provides life required moisture for biomembrane；The top of bacteria bed region case 1 is equipped with exhaust tube
7, pass through 2 purified gas of bacteria bed for being discharged.
1~No. 7 bacteria bed obtained with step 4 is respectively handled same a collection of industrial waste gas.Included in exhaust gas
Major pollutants and its concentration be hydrogen sulfide 468.31mg/m3, ammonia 13.25mg/m3, volatile organic gases (VOC)
2576.82mg/m3, exhausted air quantity 15000m3/h。
Steps are as follows:
Exhaust gas to be processed enters pretreatment zone 5 by gas collection pipeline 3, will using gas-liquid misphase exchange way
Gas regulation is to saturated humidity, and after temperature is adjusted to 15~35 DEG C, exhaust gas enters from 2 bottom of bacteria bed, upwardly through biology
Filter bed 2.The top of bacteria bed region case 1 is equipped with humidification spray equipment 6, and with the rate of 4L/d, the frequency of 1min/h is to biology
Filter bed 2 sprays tap water or middle water.Purified gas is discharged through exhaust tube 7, detects the pollutant concentration in exhaust tube exit.
The results are shown in Table 1, and the exhaust-gas treatment effect for handling No. 1 bacteria bed made from flora with No. 1 is best, to exhaust gas
The purification efficiency of middle pollutant is up to 99.8% or more, than the purification of No. 7 processing flora (control group) without containing growth-promoting flora
High-efficient about 5%.
Clean-up effect of table 1.1~7 processing floras to exhaust gas
Influence of 3. filler of embodiment to exhaust treatment efficiency
1. preparing filler
Using volcanic rock, wooden unit and raw shell as raw material, filler is made as follows.
No. 1 filler
The processing of volcanic rock: pickling 3 minutes in the nitric acid solution of pH6 are cleaned, natural air drying with clear water；Then in pH8
Sodium hydroxide solution in alkali cleaning 3 minutes, then with clear water clean, natural air drying；Fire is finally fumigated in the high steam of 5M pa
Mountain rock 2 minutes, remove volcanic rock salts substances remained on surface, the volcanic rock particle that screening partial size is 10~20mm, porosity
It is 50%.
The processing of wooden unit: machinery is carried out to wooden unit and smashes and (regular can not cut), is sieved after smashing, selection partial size is 8-
16cm, with a thickness of the wooden unit of 3-5cm.Then rifle is rushed using high pressure, is impacted wooden unit 5 seconds with the hydraulic pressure of 350M pa, improve structure hole
Gap rate is to 60%.
The processing of raw shell: raw shell is cleaned with clear water, smashes, is sieved after drying, chooses the raw shellfish that partial size is 5-8cm
Shell.
Obtained volcanic rock particle, wooden unit will be handled to be uniformly mixed with raw shell according to the volume ratio of 0.7:1.3:0.4, obtained
To No. 1 filler.
No. 2 fillers
The processing of volcanic rock: pickling 4 minutes in the nitric acid solution of pH5 are cleaned, natural air drying with clear water；Then in pH9
Sodium hydroxide solution in alkali cleaning 4 minutes, then with clear water clean, natural air drying；Fire is finally fumigated in the high steam of 8M pa
Mountain rock 3 minutes, remove volcanic rock salts substances remained on surface, the volcanic rock particle that screening partial size is 10~20mm, porosity
It is 57%.
The processing of wooden unit: machinery is carried out to wooden unit and smashes and (regular can not cut), is sieved after smashing, selection partial size is 8-
16cm, with a thickness of the wooden unit of 3-5cm.Then rifle is rushed using high pressure, is impacted wooden unit 8 seconds with the hydraulic pressure of 380 pas, improve structure hole
Rate is to 70%.
The processing of raw shell: raw shell is cleaned with clear water, smashes, is sieved after drying, chooses the raw shellfish that partial size is 5-8cm
Shell.
Volcanic rock particle and wooden unit that processing obtains are uniformly mixed with raw shell according to the volume ratio of 1.3:0.7:0.6,
Obtain No. 2 fillers.
No. 3 fillers
The processing of volcanic rock: pickling 5 minutes in the sulfuric acid solution of pH4 are cleaned, natural air drying with clear water；Then exist
Alkali cleaning 5 minutes in the potassium hydroxide solution of pH10, then cleaned with clear water, natural air drying；Finally smoked in the high steam of 10M pa
It steams volcanic rock 3 minutes, removes volcanic rock salts substances remained on surface, the volcanic rock particle that screening partial size is 10~20mm, hole
Gap rate is 60%.
The processing of wooden unit: machinery is carried out to wooden unit and smashes and (regular can not cut), is sieved after smashing, selection partial size is 8-
16cm, with a thickness of the wooden unit of 3-5cm.Then rifle is rushed using high pressure, is impacted wooden unit 10 seconds with the hydraulic pressure of 400M pa, improve structure hole
Gap rate is to 75%.
The processing of raw shell: raw shell is cleaned with clear water, smashes, is sieved after drying, chooses the raw shellfish that partial size is 5-8cm
Shell.
Obtained volcanic rock particle, wooden unit will be handled to be uniformly mixed with raw shell according to the volume ratio of 1:1:0.5, obtain 3
Number filler.
No. 4 fillers
Machinery is carried out with raw shell to volcanic rock, wooden unit respectively to smash, is sieved, and the volcanic rock that partial size is 10~20mm is chosen
Particle, partial size 8-16cm, the wooden unit with a thickness of 3-5cm, partial size are the life shell of 5-8cm.
The volcanic rock particle of screening, wooden unit are uniformly mixed with raw shell according to the volume ratio of 1:1:0.5, No. 4 is obtained and fills out
Material, as a control group.
No. 5 fillers
Using haydite as raw material, filler is prepared in accordance with the following steps: by the hydrogen of the ferric chloride solution of 1.5mol/L and pH10
Potassium oxide solution is sufficiently mixed, and is added haydite and is sufficiently mixed, and then in 400 DEG C of roasting 3h, obtains No. 5 fillers.
2, bio-film colonization
5 kinds of fillers that step 1 is obtained are respectively charged into 5 bacteria bed region casees, without compressing, are uniformly mixed i.e.
It can.It is fitted into the determination method of the packing volume in the case of bacteria bed region: packing volume Am3, exhausted air quantity Bm3/ s (must be by
m3/ h is scaled m3/ s), A/B=C, it is necessary to meet 20s≤C≤30s.Existed respectively using No. 1 bacterium solution that 2 step 3 of embodiment obtains
1~No. 5 filler surface carries out bio-film colonization, and steps are as follows: preparatory dress by bacterium solution iterative cycles and is uniformly sprayed at by water pump
Enter on the filler in the case of bacteria bed region, by debugging in 5~7 days, filler surface is made to adhere to uniform active biological film.?
To 1~No. 5 bacteria bed, 1~No. 5 filler is respectively corresponded.
3, the detection of exhaust treatment efficiency
1~No. 5 bacteria bed obtained with step 2 is respectively handled same a collection of industrial waste gas.It is main in exhaust gas
Pollutant is volatile organic gases (VOC) 2744.35mg/m3, exhausted air quantity 16000m3/ h, 3000 pa of air inlet wind pressure.
Steps are as follows:
Exhaust gas to be processed enters pretreatment zone by gas collection pipeline, using gas-liquid misphase exchange way, by gas
Body is adjusted to saturated humidity, and after temperature is adjusted to 15~35 DEG C, exhaust gas enters from bacteria bed bottom, upwardly through biological filter
Bed.The top of bacteria bed region case is equipped with humidification spray equipment, and with the rate of 4L/d, the frequency of 1min/h is sprayed to bacteria bed
Spill tap water or middle water.Purified gas is discharged through exhaust tube, detects the pollutant concentration in exhaust tube exit.
The results are shown in Table 2, the exhaust treatment efficiency highest of No. 3 fillers, up to 99.85%, than untreated No. 4 fillers
Purification efficiency it is high by 8.01%, than using existing method preparation No. 5 fillers purification efficiency it is high by 10.24%.
The performance of 2.1~No. 5 fillers of table compares
Embodiment 4. handles the case of industrial waste gas using method of the invention
Prepare bacteria bed as follows:
(1) filler is prepared
The processing of volcanic rock: pickling 3-5 minutes in the sulfuric acid solution of pH4-6, then clean, the natural air drying with clear water；So
Afterwards alkali cleaning 3-5 minutes in the potassium hydroxide solution of pH8-10, then clean, the natural air drying with clear water；Finally in 5M-10M pa
It is fumigated volcanic rock 2-3 minutes in high steam, removes volcanic rock salts substances remained on surface, screening partial size is 10~20mm's
Volcanic rock particle.
The processing of wooden unit: machinery is carried out to wooden unit and is smashed, is sieved after smashing, partial size 8-16cm, the wood of thickness 3-5cm are chosen
Block.Then rifle is rushed using high pressure, is impacted wooden unit 5-10 seconds with the hydraulic pressure of 350M-400M pa, improve structure porosity to 60-
75%.
The processing of raw shell: raw shell is cleaned with clear water, smashes, is sieved after drying, chooses the raw shellfish that partial size is 5-8cm
Shell.
Volume of the volcanic rock particle, wooden unit that processing is obtained with raw shell according to 0.7-1.3:0.7-1.3:0.4-0.6
Than after mixing, being fitted into the case of bacteria bed region, without compressing.It is fitted into packing volume in the case of bacteria bed region really
Determine method: packing volume Am3, exhausted air quantity Bm3/ s (must be by m3/ h is scaled m3/ s), A/B=C, it is necessary to meet 20s≤C
≤30s。
(2) bio-film colonization
No. 1 bacterium solution iterative cycles in reactor for being obtained 2 step 3 of embodiment by water pump, and be uniformly sprayed at pre-
It is initially charged on the filler of bacteria bed region case, by debugging in 5~7 days, filler surface is made to adhere to uniform active biological film,
Obtain bacteria bed.
Case 1
1. process object: Wuhai of Inner Mongolia's Fine Chemical Works exhaust gas, major pollutants are volatile organic gases
(VOC) and benzene class, total exhausted air quantity are 25000m3/h。
2. processing method: exhaust gas to be processed enters pretreatment zone by gas collection pipeline, originally from top spray
Water, using gas-liquid misphase exchange way, by gas regulation to saturated humidity, temperature is adjusted to 30 DEG C or so, and exhaust gas is from biological filter
Bed bottom enters, and upwardly through bacteria bed, the empty bed time is about 25s, and pollutant is used as the energy in the metabolic process of flora
It is decomposed with nutriment, is eventually converted into harmless substance.The top of bacteria bed region case is equipped with humidification spray equipment, with
The frequency of 1min/h sprays tap water to bacteria bed, humidifies for biomembrane, provides flora life required moisture content, daily water consumption
For 5L.Purified gas is discharged through top vent cylinder.
3. result data
After continuous processing exhaust gas 1 year, the pressure drop of packing layer does not have a significant changes, and the pH of packing layer and diffusate is maintained
6.5~7.5.
Case 2
1. process object: Guizhou synthesizes ammonia plant gas, and major pollutants are volatile organic gases (VOC), vulcanize
Hydrogen, ammonia and carbon disulfide, total exhausted air quantity are 22000m3/h。
2. processing method: exhaust gas to be processed enters pretreatment zone by gas collection pipeline, originally from top spray
Water, using gas-liquid misphase exchange way, by gas regulation to saturated humidity, temperature is adjusted to 30 DEG C or so, and exhaust gas is from biological filter
Bed bottom enters, and upwardly through bacteria bed, the empty bed time is about 25s, and pollutant is used as the energy in the metabolic process of flora
It is decomposed with nutriment, is eventually converted into harmless substance.The top of bacteria bed region case is equipped with humidification spray equipment, with
The frequency of 1min/h sprays tap water to bacteria bed, humidifies for biomembrane, provides flora life required moisture content, daily water consumption
For 4L.Purified gas is discharged through top vent cylinder.
3. result data
After continuous processing exhaust gas 1 year, the pressure drop of packing layer does not have a significant changes, and the pH of packing layer and diffusate is maintained
6.5~7.5.
Case 3
1. process object: Jiangsu chemical plant sewage disposal system exhaust gas, major pollutants are volatile organic gases
(VOC), hydrogen sulfide, total exhausted air quantity are 15000m3/h。
2. processing method: exhaust gas to be processed enters pretreatment zone by gas collection pipeline, originally from top spray
Water, using gas-liquid misphase exchange way, by gas regulation to saturated humidity, temperature is adjusted to 30 DEG C or so, and exhaust gas is from biological filter
Bed bottom enters, and upwardly through bacteria bed, the empty bed time is about 25s, and pollutant is used as the energy in the metabolic process of flora
It is decomposed with nutriment, is eventually converted into harmless substance.The top of bacteria bed region case is equipped with humidification spray equipment, with
The frequency of 1min/h sprays tap water to bacteria bed, humidifies for biomembrane, provides flora life required moisture content, daily water consumption
For 2.5L.Purified gas is discharged through top vent cylinder.
3. result data
After continuous processing exhaust gas 1 year, the pressure drop of packing layer does not have a significant changes, and the pH of packing layer and diffusate is maintained
6.5~7.5.
Case 4
1. process object: Hubei chemical plant exhaust gas, major pollutants are volatile organic gases (VOC), hydrogen sulfide, ammonia
Gas and carbon disulfide, total exhausted air quantity are 30000m3/h。
2. processing step: exhaust gas to be processed enters pretreatment zone by gas collection pipeline, originally from top spray
Water, using gas-liquid misphase exchange way, by gas regulation to saturated humidity, temperature is adjusted to 30 DEG C or so, and exhaust gas is from biological filter
Bed bottom enters, and upwardly through bacteria bed, the empty bed time is about 25s, and pollutant is used as the energy in the metabolic process of flora
It is decomposed with nutriment, is eventually converted into harmless substance.The top of bacteria bed region case is equipped with humidification spray equipment, with
The frequency of 1min/h sprays tap water to bacteria bed, humidifies for biomembrane, provides flora life required moisture content, daily water consumption
For 8L.Purified gas is discharged through top vent cylinder.
3. result data
After continuous processing exhaust gas 1 year, the pressure drop of packing layer does not have a significant changes, and the pH of packing layer and diffusate is maintained
6.5~7.5.
Claims (9)
1. a kind of bacteria bed for exhaust-gas treatment, which is characterized in that the microbial film adhered to comprising filler and filler surface；
The microbial film be after being mixed target flora mixture with the growth-promoting flora for improving exhaust treatment efficiency made of bacterium
Liquid is formed in filler surface by bio-film colonization；
The target flora mixture refers to the flora mixture for handling exhaust gas；The growth-promoting flora includes that mass ratio is
Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and the colloid bacillus cereus of 0.9-1.1:0.8-1.0:0.9-1.1:2.7-3.5；
The filler is by being the volcanic rock particle of 0.7-1.3:0.7-1.3:0.4-0.6, wooden unit and raw shell comprising volume ratio
Raw material is made；
The preparation method of the volcanic rock particle includes: pickling to be carried out in weak acid solution, then cleaned with clear water, natural air drying；
Then alkali cleaning is carried out in weak caustic solution, then is cleaned with clear water, natural air drying；Volcanic rock finally is fumigated with high steam, is removed
Volcanic rock salts substances remained on surface, the volcanic rock particle that screening partial size is 10~20mm；
The preparation method of the wooden unit includes: to carry out machinery to wooden unit to smash, and chooses the wooden unit that partial size is 8~16cm, uses high pressure
Rifle impact is rushed, improves structure porosity to 60-75%；
The preparation method of the raw shell includes: to clean raw shell with clear water, is smashed after drying, and the life that partial size is 5~8cm is chosen
Shell；
The volcanic rock particle prepared, wooden unit and raw shell are obtained into filler after mixing.
2. the bacteria bed according to claim 1 for exhaust-gas treatment, which is characterized in that in the growth-promoting flora, institute
The mass ratio for stating Bifidobacterium Bifidum, lactic acid bacteria, actinomyces and colloid bacillus cereus is 1:1:1:3.
3. the bacteria bed according to claim 1 for exhaust-gas treatment, which is characterized in that the target flora mixture
Mass ratio with the growth-promoting flora is 7-8:1-1.5.
4. the bacteria bed according to claim 1 to 3 for exhaust-gas treatment, which is characterized in that
In the preparation method of the volcanic rock particle, the weak acid is the nitric acid or sulfuric acid solution of pH4-6, pickling time 3-5
Minute；The weak base is the sodium hydroxide or potassium hydroxide solution of pH8-10, and the alkali cleaning time is 3-5 minutes；The high steam
Stifling refer to is fumigated volcanic rock 2-3 minutes in the steam of 5-10MPa；
In the preparation method of the wooden unit, the high pressure rushes rifle and impacts the hydraulic pressure impact wooden unit 5- referred to using 350-400MPa
10 seconds.
5. a kind of emission-control equipment, which is characterized in that include any biology for exhaust-gas treatment of claim 1-4
Filter bed.
6. exhaust-gas treatment dress described in any bacteria bed or claim 5 for exhaust-gas treatment of claim 1-4
Set the application in exhaust-gas treatment.
7. a kind of waste gas processing method, which is characterized in that using any biology for exhaust-gas treatment of claim 1-4
Emission-control equipment described in filter bed or claim 5 carries out exhaust-gas treatment.
8. at exhaust gas described in the bacteria bed or claim 5 according to claim 1 to 3 for exhaust-gas treatment
Manage device, which is characterized in that the exhaust gas includes benzene, toluene, ethylbenzene, hydrogen sulfide, carbon disulfide and/or ammonia.
9. the bacteria bed according to claim 4 for exhaust-gas treatment, which is characterized in that the exhaust gas includes benzene, first
Benzene, ethylbenzene, hydrogen sulfide, carbon disulfide and/or ammonia.
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| CN109692558A (en) * | 2019-01-18 | 2019-04-30 | 朗昆（北京）新环保科技有限公司 | The biological treatment device of the pollutant of organic volatile containing chlorine and application |
| CN111888900B (en) * | 2020-08-22 | 2022-04-15 | 山东第一医科大学(山东省医学科学院) | Carbon disulfide removal method based on low-temperature plasma reactor and coupling catalyst |
| CN112915772B (en) * | 2021-02-08 | 2022-11-22 | 朗昆（北京）新环保科技有限公司 | Nitrifying bacteria colony, biological filter bed, device and method for treating waste gas containing HCN |
| CN113813776B (en) * | 2021-09-28 | 2022-07-15 | 中国城市建设研究院有限公司 | High-concentration odor treatment process |
| CN114570194B (en) * | 2021-12-29 | 2024-03-01 | 朗昆（北京）新环保科技有限公司 | Growth promoting flora, filter bed, device and method for treating waste gas generated in viscose fiber production |
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