CN100344348C - Process for biological oxidation treatment of gaseous pollutant - Google Patents
Process for biological oxidation treatment of gaseous pollutant Download PDFInfo
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- CN100344348C CN100344348C CNB2004100668029A CN200410066802A CN100344348C CN 100344348 C CN100344348 C CN 100344348C CN B2004100668029 A CNB2004100668029 A CN B2004100668029A CN 200410066802 A CN200410066802 A CN 200410066802A CN 100344348 C CN100344348 C CN 100344348C
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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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- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The present invention provides a processing method of biological oxidation of gaseous pollutants. The gaseous pollutants are gas with degradable microorganisms. The method uses a biological contact oxidation tower, biological film stuffing is arranged in the tower, a nutrient solution immerses the whole biological stuffing, and the gaseous pollutants are oxidated and decomposed into CO2, H2O and other simple compounds by the biological contact oxidation tower. The processing method of biological oxidation of gaseous pollutants of the present invention has the advantages of large biomass, high mass transfer efficiency, no clogging, easy operation and control, etc. In addition, the present invention overcomes the defects of small biomass, easy clogging, poor mass transfer efficiency, etc. existing in similar technology. The present invention has very important market development prospect.
Description
(1) technical field
The present invention relates to the biological oxidation processing method of gaseous contaminant in the Environmental Biotechnology.
(2) background technology
Gaseous contaminant biological oxidation treatment technology is because of having advantages such as the incomparable expense of conventional method (as absorption, absorption, burning etc.) is cheap, environmentally friendly, becoming a new and high technology of promoting rapidly in the gaseous contaminant field of purification, especially at low concentration, administer than the organic exhaust gas of atm number and foul gas.Compare with more external developed countries, although China has had certain research basis, its practical application still is in the starting stage.
At present, research of gaseous contaminant biologic treating technique and application type mainly contain three classes, promptly biological washing bed, biofiltration bed and Biotrickling filter.These technology all have characteristics separately, and are good as biology washing bed absorbability, but the unit volume biomass is little, it is low to handle load, less at present application; The biofiltration bed can have bigger treating capacity, management maintenance conveniently, but artificial controlled poor, life cycle weak point; Biotrickling filter can in time be regulated by the nutrient solution circulation, the processing load is high, especially is suitable for the halogenated hydrocarbon gaseous contaminant, but has problems such as packed bed and circulatory system obstruction.And, the problem of a generality of biological filter system (comprise and drip filter) is that pollutional load, nutriment, moisture and the biomass etc. on the packing layer distribute uneven, make the biology of bearing the pollutant task resolution be in " inferior active " state all the time, this has directly influenced the treatment effeciency of system.Patent application unit finds in Biotrickling filter purified treatment carrene research process, at import concentration dichloromethane 1000mg/m
3, during EBRT20s, the removal efficient of 24PPC, 18PPC and three kinds of Biotrickling filters of 8PPC Carbon Foam is respectively about 50%, 42% and 34%, packed bed exists more serious channel, air-flow, biomass, nutrient skewness.In addition, packed bed and nutrient solution circulatory system clogging are serious.
Current, a series of problems such as pollutional load, nutrient, interphase mass transfer, biomass and bed obstruction are perplexing the long-term stability operation of traditional biological treatment system, and the solution of relevant issues has become another new research point.How, overcome the defective of traditional biological treatment system, explore the biologic treating technique of new generation of the advantage that has more, become and propose starting point of the present invention at physical parameters such as exhaust gas constituents, temperature, concentration, humidity.
(3) summary of the invention
Be to solve the above-mentioned deficiency in the biological oxidation treatment technology in the prior art, the invention provides a kind of interphase mass transfer efficient height, nutrient abundance, biomass is many and be evenly distributed, can not stop up, the pollutional load height, can effectively remove the biological oxidation processing method of gaseous contaminant.Here the gaseous contaminant of saying comprises the inorganic and organic compound that all can be decomposed by microorganism, usually more refer to produce and live in the gaseous compounds such as benzene compounds, halogenated hydrocarbon compound and hydrogen sulfide of often meeting.
For reaching goal of the invention, the technical solution adopted in the present invention is:
A kind of biological oxidation processing method of gaseous contaminant, described gaseous contaminant is the degradable gas of microorganism, described method is to adopt biological contact oxidation tower, tower built-in biological film filler, the whole biologic packing material of nutrient solution submergence, gaseous contaminant by biological contact oxidation tower, is made the oxidized CO of resolving into of pollutant
2, H
2O and other simple compounds.
Described technological process is with biological contact oxidation tower built-in biological film filler, the whole biofilm packing of nutrient solution submergence, gaseous contaminant enters from tower bottom, form micro-bubble by the aeration diffuser, biomembrane fully contacts with microorganism in the liquid phase on described micro-bubble and the filler, under liquid phase pH6.0～7.5,25～35 ℃ of temperature, the void tower time of staying 10～30s condition, under the oxygenolysis of biology, the oxidized CO that resolves into of pollutant
2, H
2O and other simple compounds.Fig. 1 is seen in concrete technological process.
Described gaseous contaminant is one of following or two or more mixture:
1. 2. 3. 4. 5. 6. 7. H of styrene of dimethylbenzene of toluene of benzene of dichloroethanes of carrene
2S
The normal gaseous contaminant of handling is a carrene.
The bio-contact oxidation waste water treatment process is to grow up for 19 end of the centurys.Consult the domestic and foreign literature data, do not have report so far about the bio-contact oxidation technology is applied to exhaust-gas treatment.In fact, the applying biological contact oxidation tower is handled waste gas, and because of liquid phase nutrient abundance, biomass is big and be evenly distributed, interphase mass transfer efficient height, and pollutional load is big, the exhaust purification efficiency height; Simultaneously, have enough spacings between filler, the space is big, and similar biological dripping and filtering system bed phenomenon of blocking can not take place.
Described nutrient solution is a nutriment of keeping the biofilm development activity, forms with the biological species of decomposing pollutant is different to change.Biomembrane is meant by what large number of biological body floccule body formed attached to the solid packing superficial growth to have a certain thickness biosphere, be subjected to the factor affecting such as characteristic of nutrient solution, oxygen branch, pH value, temperature, filler itself, biomembrane is in uneven thickness, and excursion is 1.0～3.0mm.Special needs to be pointed out is, the biological contact oxidation tower filler is the combined plastic filler, filler diameter 150mm, filler spacing 120mm up and down, left and right sides filler spacing (the middle rope spacing of bonding pad) 180mm, filler can be soft, elasticity, medium-soft half elasticity, and this finishes procedure does not have influence, specifically as shown in Figure 2.Biofilm packing is meant the filler that adheres to the certain thickness biosphere.
Described biological contact oxidation tower operating condition refers to keeps the active conditions needed of biological growth, processing object difference, microbe species is also different, the condition that need keep is also different, here Xu Shu condition is to keep the active needed scope of biological growth in the exhaust-gas treatment, and promptly pH6.0～7.5, temperature are 25～35 ℃.The void tower time of staying and processing Properties of Objects, concentration and emission request are directly related, generally speaking, the pollutant levels of handling object are high more, biological decomposes difficulty, when emission request is higher, the time of staying will be grown, on the contrary, pollutant levels are low, biology decomposes easily, when emission request is not high again, the time of staying just can be very short.The time of staying here is the design data from the economy angle proposition of practical engineering application, i.e. 10～30s.
The beneficial effect of gaseous contaminant bio-contact oxidation processing method of the present invention is mainly reflected in: advantage such as (1) has that biomass is big, mass-transfer efficiency is high, do not stop up, easy operation control; (2) overcome defectives such as little, the easy obstruction of biomass that similar technology exists, mass transfer effect difference, had the very great prospect of marketing.
(4) description of drawings
Fig. 1 is a biological oxidation processing procedure schematic diagram of the present invention; Wherein 1 is air inlet, and 2 is the aeration diffuser, and 3 is filler, 4 is tank level control system, and 5 are the demist plate, and 6 is waste gas outlet, 7 is thief hatch, and 8 is the pH control system, and 9 is check-valves, 10 is gas flowmeter, and 11 is air pump, and 12 is the gaseous contaminant generator, 13 is surge tank, and 14 is pump, and 15 is buffer solution, 16 are nutrient solution and the biomembrane discharge-channel that comes off, and 17 is nutrient solution;
Fig. 2 is a combined stuffing schematic diagram in the oxidizing tower.
(5) specific embodiment
Can be very many by the compound that microorganism is decomposed, embodiment can not enumerate one by one, only selecting has the three class gaseous contaminants of the meaning represented to test, and this three classes material is respectively carrene and dichloroethanes (representative halogenated hydrocarbons), benzene compounds (toluene, dimethylbenzene, benzene, styrene), H
2S (representing the mineral-type compound).The present invention is described further to engage specific embodiment below:
Embodiment 1:
Embodiment of the present invention and operation principle are: contain carrene 0.75g/m
3, 1.00g/m
3, 1.25g/m
3, 1.50g/m
3, 1.75g/m
3The biological contact oxidation tower treatment process of waste gas, the built-in combined bio film of tower filler, the whole biofilm packing of nutrient solution submergence, the waste gas that contains carrene enters from tower bottom, form micro-bubble by the aeration diffuser, fully contact with microorganism in the liquid phase, finish gas phase to liquid phase, arrive biomembranous mass transfer again with biomembrane on the filler, last under the oxygenolysis of biology, the oxidized CO that resolves into of compound
2, H
2O and other simple compounds, the purpose of realization waste gas purification.The void tower time of staying (EBRT) is 15s, liquid phase PH valve 6.0～7.0, and 25～35 ℃ of temperature, exhaust-gas treatment the results are shown in Table 1.
Table 1 carrene exhaust-gas treatment result
Table 1 is the result show, bio-contact oxidation waste gas treatment process of the present invention can effectively be handled and contain carrene waste gas, and the clearance of carrene is respectively 100%, 99.8%, 98.4%, 96.2%, 92.5%.
Embodiment 2:
Embodiment of the present invention and operation principle are: other condition is with embodiment 1, and the void tower time of staying (EBRT) is 10s, liquid phase PH valve 6.0～7.0, and 25～30 ℃ of temperature, result sees Table 2.
Table 2 carrene exhaust-gas treatment result
Table 2 is the result show, bio-contact oxidation waste gas treatment process of the present invention can effectively be handled and contain carrene waste gas, and the clearance of carrene is respectively 100%, 97.7%, 94.5%, 90.3%, 83.1%.
Embodiment 3:
Embodiment of the present invention and operation principle are: other condition is with embodiment 1, and the void tower time of staying (EBRT) is 20s, liquid phase PH valve 6.0-7.0, and temperature 25-35 ℃, result sees Table 3.
Table 3 carrene exhaust-gas treatment result
Table 3 is the result show, bio-contact oxidation waste gas treatment process of the present invention can effectively be handled and contain carrene waste gas, and the clearance of carrene is respectively 100%, 100%, 98.8%, 97.1%, 94.3%.
Embodiment 4:
Embodiment of the present invention and operation principle are: contain the biological contact oxidation tower treatment process of carrene and dichloroethanes waste gas, wherein concentration dichloromethane 0.75g/m
3, dichloroethanes concentration 0.1g/m
3The built-in combined bio film of tower filler, the whole biofilm packing of nutrient solution submergence, the waste gas that contains benzene compounds enters from tower bottom, form micro-bubble by the aeration diffuser, fully contact with microorganism in the liquid phase, finish gas phase to liquid phase, arrive biomembranous mass transfer again with biomembrane on the filler, last under the oxygenolysis of biology, the oxidized CO that resolves into of compound
2, H
2O and other simple compounds, the purpose of realization waste gas purification.The void tower time of staying (EBRT) is respectively 10,20,30s, liquid phase PH valve 6.0～7.0, and 25～35 ℃ of temperature, carrene and dichloroethanes treatment effeciency are respectively 83.4% and 76.2%, 94.6% and 80.3%, 100% and 90.1% in the waste gas.
Embodiment 5:
Embodiment of the present invention and operation principle are: other condition is with embodiment 4, wherein concentration dichloromethane 1.0g/m
3, dichloroethanes concentration 0.15g/m
3, the void tower time of staying (EBRT) is respectively 10,20,30s, liquid phase PH valve 6.0～7.0, and 25～35 ℃ of temperature, carrene and dichloroethanes treatment effeciency are respectively 75.6% and 65.4%, 83.7% and 76.3%, 96.6% and 80.1% in the waste gas.
Embodiment 6:
Embodiment of the present invention and operation principle are: contain H
2S 0.50g/m
3The biological contact oxidation tower treatment process of waste gas, the built-in combined bio film of tower filler, the whole biofilm packing of nutrient solution submergence contains H
2The waste gas of S enters from tower bottom, form micro-bubble by the aeration diffuser, fully contact with microorganism in the liquid phase, finish gas phase to liquid phase, arrive biomembranous mass transfer again with biomembrane on the filler, last under the oxygenolysis of biology, the oxidized CO that resolves into of compound
2, H
2O and other simple compounds, the purpose of realization waste gas purification.The void tower time of staying (EBRT) is respectively 10,20,30s, liquid phase PH valve 6.0～7.0, and 25～35 ℃ of temperature, exhaust-gas treatment efficient is respectively 95.3%, 98.6%, 100%.
Embodiment 7:
Embodiment of the present invention and operation principle are: other condition is with embodiment 6, wherein H
2S concentration 1.0g/m
3, the void tower time of staying (EBRT) is 10,20,30s, liquid phase PH valve 6.0～7.0, and 25～35 ℃ of temperature, exhaust-gas treatment efficient is respectively 93.5%, 96.1%, 98.4%.
Embodiment 8:
Embodiment of the present invention and operation principle are: contain the biological contact oxidation tower treatment process of benzene compounds waste gas, wherein toluene 0.50g/m
3, benzene 0.20g/m
3, dimethylbenzene 0.10g/m
3, styrene 0.06g/m
3The built-in combined bio film of tower filler, the whole biofilm packing of nutrient solution submergence, the waste gas that contains benzene compounds enters from tower bottom, form micro-bubble by the aeration diffuser, fully contact with microorganism in the liquid phase, finish gas phase to liquid phase, arrive biomembranous mass transfer again with biomembrane on the filler, last under the oxygenolysis of biology, the oxidized CO that resolves into of compound
2, H
2O and other simple compounds, the purpose of realization waste gas purification.The void tower time of staying (EBRT) is respectively 10,30s, liquid phase PH valve 6.5～7.5,25～35 ℃ of temperature, toluene, benzene, dimethylbenzene, styrene treatment effeciency are respectively 90.2,81.3%, 83.4%, 64.6% and 92.0%, 85.0%, 87.0%, 71.5% in the waste gas.
Embodiment 8:
Embodiment of the present invention and operation principle are: other condition is with embodiment 7, wherein toluene 0.8g/m
3, benzene 0.35g/m
3, dimethylbenzene 0.15g/m
3, styrene 0.10g/m
3The void tower time of staying (EBRT) is respectively 10,30s, liquid phase PH valve 6.5～7.5,25～35 ℃ of temperature, toluene, benzene, dimethylbenzene, styrene treatment effeciency are respectively 89.1%, 78.1%, 83.0%, 65.2% and 88.3%, 82.7%, 83.6%, 68.7% in the waste gas.
Annotate: gas phase carrene, dichloroethanes, benzene compounds, the H that the present invention relates to
2The correlation method of regulation in " (air and waste gas method for monitoring and analyzing " that the S concentration monitoring method adopts that State Environmental Protection Administration writes.
In sum, in containing the biological contact oxidation tower treatment process of gaseous state compound exhaust air, the built-in combined bio film of tower filler, the whole biofilm packing of nutrient solution submergence, the waste gas that contains pollutant enters from tower bottom, forms micro-bubble by the aeration diffuser, fully contact with microorganism in the liquid phase with biomembrane on the filler, finish gas phase to liquid phase, arrive biomembranous mass transfer again, last under the oxygenolysis of biology, the oxidized CO that resolves into of compound
2, H
2O and other simple compounds have been realized the purpose of waste gas purification, and each pollutant is all effectively removed.
Claims (4)
1. the biological oxidation processing method of a gaseous contaminant, it is characterized in that: described gaseous contaminant is the degradable gas of microorganism, described method is to adopt biological contact oxidation tower, tower built-in biological film filler, the whole biologic packing material of nutrient solution submergence, gaseous contaminant enters from tower bottom, form micro-bubble by the aeration diffuser, biomembrane fully contacts with microorganism in the liquid phase on described micro-bubble and the filler, in liquid phase pH6.0～7.5,25～35 ℃ of temperature, under the void tower time of staying 10～30s condition, under the oxygenolysis of biology, the oxidized CO that resolves into of pollutant
2, H
2O and other simple compounds.
2. the biological oxidation processing method of gaseous contaminant as claimed in claim 1, it is characterized in that described biological contact oxidation tower filler is the combined plastic filler, filler diameter 150mm, filler spacing 120mm up and down, the middle rope left and right sides filler spacing of bonding pad is 180mm.
3. the biological oxidation processing method of gaseous contaminant as claimed in claim 1 or 2 is characterized in that described gaseous contaminant is one of following or two or more mixture: 1. 2. 3. 4. 5. 6. 7. H of styrene of dimethylbenzene of toluene of benzene of dichloroethanes of carrene
2S.
4. the biological oxidation processing method of gaseous contaminant as claimed in claim 3 is characterized in that described gaseous contaminant is a carrene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100668029A CN100344348C (en) | 2004-09-29 | 2004-09-29 | Process for biological oxidation treatment of gaseous pollutant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100668029A CN100344348C (en) | 2004-09-29 | 2004-09-29 | Process for biological oxidation treatment of gaseous pollutant |
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| CN1724124A CN1724124A (en) | 2006-01-25 |
| CN100344348C true CN100344348C (en) | 2007-10-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102764585B (en) * | 2012-07-16 | 2015-04-15 | 中山大学 | Suspended biological filter bed for treating organic waste gas |
| CN103833125B (en) * | 2013-12-11 | 2015-06-03 | 武汉拓泰石化环保科技有限公司 | High-speed aeration oxidation treatment apparatus for industrial sewage |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3542599A1 (en) * | 1985-12-03 | 1987-06-04 | Ulrich Dipl Ing Baeuerle | Process and apparatus for eliminating sparingly water-soluble and readily volatile impurities from an exhaust air stream or exhaust gas stream by biological oxidation |
| US5954858A (en) * | 1995-11-22 | 1999-09-21 | North Carolina State University | Bioreactor process for the continuous removal of organic compounds from a vapor phase process stream |
| CN1398195A (en) * | 2000-12-04 | 2003-02-19 | 百奥森特有限公司 | Biofilter equipped with stirrer and injector of solid feed and method for removing odor and volatile compounds from waste gases using same |
| CN1453062A (en) * | 2002-04-23 | 2003-11-05 | 长春市环保技术开发公司 | Biological filtering method of eliminating off odour from solid waste |
-
2004
- 2004-09-29 CN CNB2004100668029A patent/CN100344348C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3542599A1 (en) * | 1985-12-03 | 1987-06-04 | Ulrich Dipl Ing Baeuerle | Process and apparatus for eliminating sparingly water-soluble and readily volatile impurities from an exhaust air stream or exhaust gas stream by biological oxidation |
| US5954858A (en) * | 1995-11-22 | 1999-09-21 | North Carolina State University | Bioreactor process for the continuous removal of organic compounds from a vapor phase process stream |
| CN1398195A (en) * | 2000-12-04 | 2003-02-19 | 百奥森特有限公司 | Biofilter equipped with stirrer and injector of solid feed and method for removing odor and volatile compounds from waste gases using same |
| CN1453062A (en) * | 2002-04-23 | 2003-11-05 | 长春市环保技术开发公司 | Biological filtering method of eliminating off odour from solid waste |
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