CN100455340C - Gaseous pollutant biological elimination technics - Google Patents
Gaseous pollutant biological elimination technics Download PDFInfo
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- CN100455340C CN100455340C CNB2006100271600A CN200610027160A CN100455340C CN 100455340 C CN100455340 C CN 100455340C CN B2006100271600 A CNB2006100271600 A CN B2006100271600A CN 200610027160 A CN200610027160 A CN 200610027160A CN 100455340 C CN100455340 C CN 100455340C
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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
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Abstract
The present invention provides one kind of biological gaseous pollutant eliminating process, in which pollutant containing gas is washed with detergent containing microbes for purifying. The present invention features that contacting filter bed with adsorbent is set inside a circulating groove, the circular washing solution flows through the circulating groove, and the adsorbent may adsorb the pollutant or desorb the adsorbed pollutant based on the pollutant adsorbing concentration so as to regulate the pollutant load of the circular washing solution. The present invention can regulate the fluctuation of pollutant load in the bioreactor to raise the pollutant load impact of the purifying system, and remit the poisoning and inhibiting of the pollutant to be purified on the microbes to raise the system stability in condition of fluctuating pollutant load.
Description
Technical field
The present invention relates to handle in the environmental protection field technology of atmosphere pollution, relate in particular to a kind of gaseous pollutant biological elimination technics.
Background technology
Gas biological purifying is one of hot spot technology of Air Pollution Control.
Bioanalysis has obtained more and more widely research and application abroad as a kind of process for purifying of novel gaseous contaminant, existing many examples that successfully adopt bioanalysis in the purification practice of the deodorization of states such as Germany, Holland, the U.S. and Japan and organic exhaust gas in recent years.Domestic in recent years experimental study and existing biological deodorization device input of also having carried out some this respects used.Compare with traditional physico-chemical purification method, bioanalysis has advantages such as the investment operating cost is low, less secondary pollution.According to existing bibliographical information, bioanalysis is being handled low concentration (thousands of 10
-6(V/V) following), more apparent its economy during the good gaseous contaminant of biodegradability.
The principle of biological method purification gaseous contaminant is to utilize microorganism with carbon source and the energy of the pollutant in the waste gas as its life metabolic activity, finally be converted into materials such as carbon dioxide, water and cellular material, thereby reach the purpose of removing pollutant in the gas, its essence is artificial reinforcement and a kind of natural step that can Engineering Control, comprise that gaseous contaminant transfers to mass transfer step liquid phase or the solid phase surface liquid film and the microorganism of liquid phase or solid phase surface absorbs degradation step from gas phase.
Whether gas biological purifying method can flow according to the liquid phase in the process equipment, and whether microbiologic population is fixing, be divided into three types: biofiltration, biological washing and bio-trickling, its essence obtain the purification of degrading after being and making pollutant and microorganism contact by carrier interface.Biofiltration technology relies on the absorption absorbent properties of biofiltration material itself that pollutant is shifted to biofacies from gas phase fully, and this technology mainly is fit to the gas purification of some low pollutional load occasions.Biological washing and bio-trickling technology all adopt mode that liquid circulates to guarantee the supply of moisture in the living environment of microorganism, fluctuation to gas load has certain adaptability, but when some have the inhibiting pollutant of murder by poisoning to microorganism in purification, tend to cause in a period of time in the circulation fluid concentration of pollutant constantly to accumulate because of the fluctuation of pollutant burden, and then the performance of system caused great influence, even may cause the collapse of whole gas biological purifying system.
Generally, a certain amount of microorganism has a limiting value to the conversion of pollutant.Can adopt the mode that improves the system handles scale to solve the high load capacity problem for continual and steady high-pollution load.But because the microflora adjustment time certain to meeting the needs of of pollutional load, therefore stable pollutant burden helps the stable operation of biological purification method.For those average pollutional loads is not very high, but the bigger occasion of load variations fluctuation, and the performance of microflora is also less stable often, has some biological inhibition and toxic actions again as pollutant, also might cause the collapse of biological purification system.
Summary of the invention
Purpose of the present invention is to solve the problems referred to above that prior art exists, and a kind of gas organic pollution biological purification method that can effectively regulate the pollutant burden fluctuation is provided.
The object of the present invention is achieved like this:
A kind of gaseous pollutant biological elimination technics adopts the cleaning solution that contains microorganism that the gas that contains pollutant is carried out washing, purifying,
May further comprise the steps:
A, the gas that will contain pollutant are introduced bioreactor, absorb with the circulating cleaning solution spray that contains microorganism, and gas is purified;
B, the back discharging of will dewatering through the gas introducing demister that purifies;
C, circulating cleaning solution are squeezed in the bioreactor by circulating pump, and the gas that contains pollutant is once sprayed absorption;
D, the circulating cleaning solution of finishing after once spray absorbs flow back to circulating slot, and contact bed by being arranged in the circulating slot and constituting by adsorbent, adsorbent is according to the difference of pollutant levels in self adsorbed contaminants concentration and the circulating cleaning solution, pollutant is adsorbed or resolves, to regulate the pollutional load of circulating cleaning solution;
Circulating cleaning solution after e, process adsorbent are regulated is squeezed in the bioreactor by circulating pump again, carries out next one spray and absorbs circulation.
In described step a, earlier pollutant is transferred to liquid phase from gas phase, in liquid phase, absorbed, adsorb and degraded then by microorganism.
Adsorbent described in the steps d is an active carbon.
Adsorbent described in the steps d is that the processing object is had special adsorbing resinae adsorbent.
According to the adsorption equilibrium rule, under the little situation of variations in temperature, usually the increase with its ambient concentration of living in increases adsorbent to the adsorption capacity of pollutant, has the advantages that to resolve under the absorption and low concentration situation under the high concentration situation.The present invention can effectively regulate the fluctuation of the pollutant burden in the bioreactor by the mode of configuration sorbing material in the circulatory system of circulating cleaning solution, makes cleaning system improve greatly the impact tolerance degree of toxic pollutant load.Can alleviate the murder by poisoning inhibitory action of pollutant to be clean effectively, solve the stable operation problem of system under the pollutant burden fluctuation situation microorganism.The present invention can be used for the improvement of existing gas biological purifying method and the biological cleaning occasion of the more organic gas of some poisonous and harmfuls.
Description of drawings
Fig. 1 is a kind of gaseous pollutant biological elimination technics flow chart of the present invention.
The specific embodiment
Cooperation is referring to Fig. 1, a kind of gaseous pollutant biological elimination technics of the present invention, be to adopt the cleaning solution that contains microorganism the gas that contains pollutant to be carried out a kind of biological washing methods of washing, purifying, this technology will contain the gas (can through or without preliminary treatment) of pollutant and introduce bioreactor 1 (being provided with filler 11 in bioreactor 1), absorb with the circulating cleaning solution spray that contains microorganism, make pollutant wherein be transferred to liquid phase from gas phase, in liquid phase, absorbed, adsorb and degraded, gas is purified by microorganism; To introduce demister 2 demists dehydration back discharging through the gas that purifies then.Circulating cleaning solution is then pumped in the bioreactor 1 from circulating slot 4 by circulating pump 3, and the gas that contains pollutant is sprayed absorption; Finish once circulating cleaning solution after spray absorbs and discharge from bioreactor 1 then and flow back to circulating slot 4, and the contact bed 5 by being arranged in the circulating slot 4 and constituting by adsorbent, adsorbent can adopt active carbon.When the contact bed 5, adsorbent is according to the difference of pollutant levels in self adsorbed contaminants concentration and the circulating cleaning solution at circulating cleaning solution, pollutant adsorbed or resolves, with the pollutional load of adjusting circulating cleaning solution.Squeeze in the bioreactor 1 by circulating pump 3 again through the circulating cleaning solution after the adsorbent adjusting, carry out next one spray and absorb circulation.
Adopt technology of the present invention that the air that contains phenol gas is handled, and compare with existing technology, the result is as follows: when adopting existing technology to handle (contact bed that is made of adsorbent is not set in circulating slot), when the phenol entrance concentration is 283～396mg/m
3The time, moving after 2 days, the circulation fluid cumulative concentration rises to 1600mg/L, and the system handles effect sharply descends.And when adopting this technology to handle (in circulating slot, being provided with the contact bed that constitutes by adsorbent), be 336～753mg/m in the phenol import volume
3Scope the time, the circulation fluid cumulative concentration is stabilized in about 1000mg/L, and bioreactor performance is stable, has only on entrance concentration limit for height to 894mg/m
3The time, just beginning to occur the circulation fluid phenol concentration and raise, the phenomenon that clean-up effect descends shows with the technology that is not equipped with contact bed and compares that the present invention improves Pyrogentisinic Acid's impact load tolerance effectively, the biological purification method system is also stable more.
Adopt technology of the present invention that the air that contains methyl ethyl ketone is handled, and compare with existing technology, the result is as follows: when pollutant levels are 420mg/m
3The time, purification efficiency is 91.2%, but when pollutant levels from 420mg/m
3Be increased to 764mg/m
3Continue after 3 hours, the bioreactor (contact bed that is made of adsorbent promptly is not set in circulating slot) that is not equipped with the adsorption-buffering system drops to 84.7% to gas cleaning efficient, and the concentration of methyl ethyl ketone also is increased to 1423mg/L from 912mg/L in the liquid.And the granular activated carbon that in circulating slot, adds 10% (stacking volume) as the adsorption-buffering agent after, when the entrance concentration of methyl ethyl ketone from 397mg/m
3Bring up to 723mg/m
3, the purifying property of bioreactor only drops to 93.1% from 94.3%, and the concentration of methyl ethyl ketone only has 543mg/L in the circulating fluid.Show that the adsorption-buffering agent has adaptive capacity preferably to the big ups and downs of dusty gas inlet load.
The present invention has further expanded the range of application of gas biological purifying, has improved effectively tool poison is suppressed the alter a great deal stability of gas purge system under the situation of the buffer capacity of pollutant of microbial action and pollutant burden.
Claims (4)
1, a kind of gaseous pollutant biological elimination technics adopts the cleaning solution that contains microorganism that the gas that contains pollutant is carried out washing, purifying,
It is characterized in that, may further comprise the steps:
A, the gas that will contain pollutant are introduced bioreactor, absorb with the circulating cleaning solution spray that contains microorganism, and gas is purified;
B, the back discharging of will dewatering through the gas introducing demister that purifies;
C, circulating cleaning solution are squeezed in the bioreactor by circulating pump, and the gas that contains pollutant is once sprayed absorption;
D, the circulating cleaning solution of finishing after once spray absorbs flow back to circulating slot, and contact bed by being arranged in the circulating slot and constituting by adsorbent, adsorbent is according to the difference of pollutant levels in self adsorbed contaminants concentration and the circulating cleaning solution, pollutant is adsorbed or resolves, to regulate the pollutional load of circulating cleaning solution;
Circulating cleaning solution after e, process adsorbent are regulated is squeezed in the bioreactor by circulating pump again, carries out next one spray and absorbs circulation.
2, gaseous pollutant biological elimination technics as claimed in claim 1,
It is characterized in that:
In described step a, earlier pollutant is transferred to liquid phase from gas phase, in liquid phase, absorbed, adsorb and degraded then by microorganism.
3, gaseous pollutant biological elimination technics as claimed in claim 1,
It is characterized in that:
Adsorbent described in the steps d is an active carbon.
4, gaseous pollutant biological elimination technics as claimed in claim 1,
It is characterized in that:
Adsorbent described in the steps d is that the processing object is had special adsorbing resinae adsorbent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100271600A CN100455340C (en) | 2006-05-31 | 2006-05-31 | Gaseous pollutant biological elimination technics |
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| CNB2006100271600A CN100455340C (en) | 2006-05-31 | 2006-05-31 | Gaseous pollutant biological elimination technics |
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| Publication Number | Publication Date |
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| CN101081355A CN101081355A (en) | 2007-12-05 |
| CN100455340C true CN100455340C (en) | 2009-01-28 |
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| CNB2006100271600A Expired - Fee Related CN100455340C (en) | 2006-05-31 | 2006-05-31 | Gaseous pollutant biological elimination technics |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101780372B (en) * | 2010-01-29 | 2012-09-19 | 华南理工大学 | Method and device for processing laboratory exhaust gas |
| CN104437007B (en) * | 2014-11-03 | 2020-08-04 | 中国科学院城市环境研究所 | Remove formaldehyde air purifier |
| WO2020131309A1 (en) * | 2018-12-20 | 2020-06-25 | Entegris, Inc. | Active wet scrubbing filtration system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4723968A (en) * | 1986-03-12 | 1988-02-09 | Keramchemie Gmbh | Method and apparatus for the purification of waste air containing biologically decomposable impurities |
| EP0328708A1 (en) * | 1986-12-04 | 1989-08-23 | Keramchemie GmbH | Process for cleaning exhaust air |
| CN2364960Y (en) * | 1999-03-05 | 2000-02-23 | 天津大学 | Waste gas purification and deodorization biological filtering-absorbing compound tower |
| CN2768882Y (en) * | 2004-11-16 | 2006-04-05 | 天津创业环保股份有限公司 | Boilogical trickling filtering device for treating foul smell |
-
2006
- 2006-05-31 CN CNB2006100271600A patent/CN100455340C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4723968A (en) * | 1986-03-12 | 1988-02-09 | Keramchemie Gmbh | Method and apparatus for the purification of waste air containing biologically decomposable impurities |
| EP0328708A1 (en) * | 1986-12-04 | 1989-08-23 | Keramchemie GmbH | Process for cleaning exhaust air |
| CN2364960Y (en) * | 1999-03-05 | 2000-02-23 | 天津大学 | Waste gas purification and deodorization biological filtering-absorbing compound tower |
| CN2768882Y (en) * | 2004-11-16 | 2006-04-05 | 天津创业环保股份有限公司 | Boilogical trickling filtering device for treating foul smell |
Non-Patent Citations (4)
| Title |
|---|
| 生物洗涤法治理含苯酚废气研究. 刘玉红等.环境科学研究，第17卷第4期. 2004 |
| 生物洗涤法治理含苯酚废气研究. 刘玉红等.环境科学研究，第17卷第4期. 2004 * |
| 苯系混合气体生物滴滤器非稳态工况性能. 羌宁等.环境科学，第26卷第1期. 2005 |
| 苯系混合气体生物滴滤器非稳态工况性能. 羌宁等.环境科学，第26卷第1期. 2005 * |
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