CN101992022B - Method for controlling excessive biomembrane accumulation in gas-phase biofilter - Google Patents
Method for controlling excessive biomembrane accumulation in gas-phase biofilter Download PDFInfo
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- CN101992022B CN101992022B CN2010105044737A CN201010504473A CN101992022B CN 101992022 B CN101992022 B CN 101992022B CN 2010105044737 A CN2010105044737 A CN 2010105044737A CN 201010504473 A CN201010504473 A CN 201010504473A CN 101992022 B CN101992022 B CN 101992022B
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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 invention discloses a method for controlling excessive biomembrane accumulation in a gas-phase biofilter, belonging to the field of biofiltration process based waste gas treatment of atmospheric pollution control engineering in environmental engineering, particularly relating to a method for biologically controlling excessive biomembrane accumulation in a gas-phase biofilter. In the method, a certain amount of adults of blattaria in insect are loaded into the gas-phase biofilter with excessively accumulated biomembranes and used for swallowing the biomembranes accumulated on the surface and the shallow layer of a filler layer of the biofilter, and thus, the excessive biomembrane accumulation in fillers can be controlled effectively. By using the method, under the condition of not increasing operating equipment and not changing the operation conditions of the biofilter, the long-term, continuous and stable operation performance of the gas-phase biofilter can be maintained by using biological swallowing to remove the biomembranes excessively accumulated in the surface and the shallow layer of the filler layer. The method is convenient to operate, is economical, effective, environment friendly and the like.
Description
Technical field
The biofiltration process that the invention belongs to Air Pollution Control Engineering in the environmental project is processed waste gas field, particularly a kind of biological control method of excessive biomembrane accumulation in gas-phase biofilter.
Background technology
The toxic emission that contains volatile organic matter is serious environment pollution, causes crop production reduction, destroys forest and the ecosystem, consumes ozone and forms photochemical fog, damages directly or indirectly health, even carcinogenic and teratogenesis.At present, the technology of cleaning organic waste gas can be divided into two large classes: absorption method and decomposition method.Absorption method comprises absorption method, absorption process and condensation method; Decomposition method comprises burning method, flame method and biological degradation method.Other technology still is in initial development, comprises film separation, ultraviolet Oxidation at room temperature, electric arc decomposition, plasma decomposes and catalytic ozonation method etc.Physical method or chemical method may exist the investment operating cost high, remove the low or secondary pollution problems of efficient.
The gas phase biological filtering technology is a kind of main biological control method of organic exhaust gas, and it utilizes the biomembrane that is attached on the filtering layer filler, and the pollutant in the waste gas is decomposed, is converted into simple inorganic matter (CO
2, H
2O etc.) or the cell component.Except needs provided the essential nutriment of microbial life metabolism, the biofiltration process did not generally need to add other medicaments, had the advantages such as the operating cost of investment is low, effect better, non-secondary pollution.Therefore, the gas phase biological filtering technology is applied to process multiple pollutant just more and more widely in recent years, such as inorganic matters such as hydro carbons (chain hydrocarbon, halogenated alkane, aliphatic hydrocarbon, aromatic hydrocarbon), oxygen-bearing organic matter (alcohol, ether, ketone, aldehyde), nitrogenous or sulfur organic (amine, mercaptan, thioether) and hydrogen sulfide, sulfur dioxide, ammonia, nitrogen oxide.
The gas phase biological filtering device is excessively accumulated phenomenon usually can occurring biomembrane after the long-time running in filler, particularly under high-load condition.Biomembranous excessively accumulating can cause the gas phase biological filtering device numerous operational issues to occur, such as problems such as bed obstruction, short stream, pressure drop increases, also is the immediate cause that handling property sharply worsens when causing the reactor long-time running.At present, the control method excessively accumulated of biomembrane can be divided into physics, chemistry and biological method etc.Physical method is that the most effective current biomembrane is accumulated control method, but also has in actual applications the shortcomings such as high energy consumption, equipment is complicated, operation maintenance is difficult.Chemical method is by control supply carbon source and add nutrient source or with containing that oxidant, surfactant, bactericide and chemical solution are washed or the method such as perfusion is controlled biomembrane and accumulated.The physics and chemistry method all can't keep the performance of the long-term continous-stable of reactor.Biological method control biomass is excessively accumulated ecological basic principles such as being based on ecological pyramids, trophic level and grazing food chain, introduce the living species on the higher trophic level, the predation by grazing food chain reduces the living species quantity on the low trophic level.Because the relation between the micro organism quantity of Different Nutrition level has formed biomass pyramid, longer food chain need to consume more energy, thereby the biomass productive rate will reduce greatly.Yet it still is in the Primary Study stage.Up to the present also do not find the method that biomembrane is excessively accumulated of controlling cost-effectively.
Biomembranous research of excessively accumulating and patented technology are also seldom in the applying biological method control gas phase biological filtering device.There are some researches show, throwing in protozoan can increase the salinity of carbon, slight degradation of toluene capacity and reduction biomass rate of accumulation (the Cox HHJ of increasing, Nguyen TT, Deshusses MA.Predation of bacteria by the protozoa tetrahymena pyriformis in toluene-degrading cultures.Biotechnology Letters 1999,21 (3): 235-239).Introducing acarid (mites) helps the excessive fungi of control to increase and the pressure head reduction.(the Bhaskaran K such as Bhaskarn, Nadaraja AV, Balakrishnan MV, et al.Dynamics of sustainable grazing fauna and effect on performance of gas biofilter.Journal of Bioscience and Bioengineering, 2008,105 (3): 192-197) compared some predators that contain micro-metazoa and comprised food meat nematode (Caenorhabditis sp.), wheel animalcule (Phildina sp.), arthropod (Echiniscus sp.) and infusorian protozoan comprise Colpoda inflata, Euplotes harpa and Acineria sp. find nematode, wheel animalcule and infusorian all are adapted at growing in the wider pollutant levels scope and being stabilized in some.Still be in elementary or experimental stage and utilize microfauna prey control biomass to accumulate.The method that relevant insect imago control biomembrane is excessively accumulated there is not yet report.
Insecta Blattaria animal belongs to omnivorous insect, and survival ability is strong, and food species is very extensive, and many types are take the organic matter of corruption as staple food.The place perch in warm, moist, food in abundance and many slits is that they multiply needed 4 primary conditions.In the gas phase biological filtering device of excessively accumulating, substantially all possesses above-mentioned condition.And the effective ways of catching and killing them are a lot, and its natural enemy is also a lot, such as spider, scorpion, centipede, ant, toad, lizard, large inscription, cat, monkey and mouse etc.When being under the rugged environment condition, when anhydrous again without food, the phenomenon that kills and devour mutually can occur between them.Therefore, when using Insecta Blattaria animal, be easy to control.Based on this important discovery and further investigate, operating condition by the control biofilter, obtained Insecta Blattaria animal and be very suitable for controlling the conclusion of excessive biomembrane accumulation in gas-phase biofilter, so apply for the present invention---a kind of method of controlling excessive biomembrane accumulation in gas-phase biofilter.
Summary of the invention
The object of the invention is to overcome the biomembranous problems such as to cause bed obstruction, short stream, pressure drop increase of excessively accumulating in the gas phase biological filtering device filler, and then the problem that handling property sharply worsens when causing the reactor long-time running, process organic exhaust gas for biologic filtration method a kind of biological method that biomembrane is excessively accumulated of controlling cost-effectively is provided.
The method that the present invention controls excessive biomembrane accumulation in gas-phase biofilter is the Insecta Blattaria animal adult of some to be dropped into excessively accumulate in the biomembranous gas phase biological filtering device, utilize the predation of Insecta Blattaria animal, reduce the surface of biofilter packing layer and the biofilm biomass that accumulate at the shallow-layer place; The Insecta Blattaria animal of dropping into is to move in open-air kind, and they can be take the organic matter of corruption as staple food; Be used for the biofilter that this method control biomembrane excessively accumulates and seal, certain space is arranged between filler outer surface and the reactor wall, the freely activity and can not climb out of reactor of Insecta Blattaria animal.The method of control excessive biomembrane accumulation in gas-phase biofilter of the present invention comprises the steps:
(1) the Insecta Blattaria animal of screening and culturing take corrupt organic matter as staple food;
(2) seal and filling kind and the hole/pore size of inspection biofiltration reactor are determined supply volume and release position, and are guaranteed the operation condition of good biological control method;
(3) the screening animal of some is put into reactor, the control operation condition continues the stable operation reactor, the Insecta Blattaria animal biomembrane of eating in reactor;
(4) according to handling property and the running status of reactor, weather and the quantity of monitoring Insecta Blattaria animal are added or are reduced even eliminates this animal.
Described Insecta Blattaria animal adult, and control the quantity of this animal, be generally per 0.05～0.5m
2Filler 1 the Insecta Blattaria animal adult of batching.
Described biofilter filler adopts inert material to make, and is not the food of Insecta Blattaria animal.
It is less that described biofilter filler is piled up the hole aperture of the space that forms and filler itself, generally all should be less than 0.5cm, and the adult of Insecta Blattaria animal can not creep into the eat biomembrane of packing layer depths of space or hole.
Beneficial effect:
Essence of the present invention is based on ecological basic principle, excessively accumulate the surface that usually at first occurs near the filler biofilter air inlet or the characteristics of shallow-layer according to biomembrane, utilize omnivorous insect, take corrupt organic matter as staple food, under strong, the mal-condition of survival ability even the Insecta Blattaria animal that kills and devour mutually, the biomembrane of eating and excessively accumulating in filler top layer or the shallow-layer reaches the purpose of control excessive biomembrane accumulation in gas-phase biofilter.Because biofilter operates under the condition of moistening, middle temperature, be fit to very much life and the existence of Insecta Blattaria animal.The present invention can be in the situation that do not increase operational outfit, do not change the biofilter service condition, only eating to remove by biology is accumulated in the biomembrane of excessively accumulating in filler top layer and the shallow-layer, and can not affect the runnability of the long-term continous-stable of biofilter.
Compared with prior art, advantage of the present invention just is:
1, do not need to increase operational outfit, do not need not change the biofilter service condition, only eating to remove by biology is accumulated in the biomembrane of excessively accumulating in filler top layer and the shallow-layer, keeps the runnability of the long-term continous-stable of gas phase biological filtering device.
2, easy and simple to handle, economical and effective, environmental friendliness.
The specific embodiment
Control the method for excessive biomembrane accumulation in gas-phase biofilter below by specific embodiment narration the present invention.Unless stated otherwise, used technological means is method known in those skilled in the art among the present invention.In addition, embodiment is interpreted as illustrative, but not limits the scope of the invention.To those skilled in the art, under the prerequisite that does not deviate from essence of the present invention and scope, to the various changes of the animal species in the embodiment and biofiltration reactor and operating condition and operation method or change and also belong to protection scope of the present invention.
Example 1 is utilized and biomembranously in the blattaria control tubular type biofilter is excessively accumulated
The tubular type biofilter has been obtained independent intellectual property right (Yang Chunping, Chen Hong as the novel gas phase biological filtering device of a class, Ceng Guang is bright, thanks to renewal, Zhong Yuanyuan, Yu Guanlong, Lei Min, Wang Jiaqiang. pipe gas phase biological filtering device. the patent No.: ZL 2,008 1 0030859.1).The tubular type biofilter has proved and can be used for the processing that the low concentration atm number contains toluene waste gas.The tubular type biofilter of service test scale is for investigating object in the present embodiment.The tubular type biofilter is is mainly imported and exported by cylindricality urceolus, tubular filler, nutrient solution distributor, gas (liquid) body and is formed.The cylindricality urceolus adopts lucite tube material, internal diameter 16cm, tube wall 0.5cm, high 15cm.Waste gas enters through the gas feed at center, TBF top, walks around the nutrient solution distributor, passes from outside to inside the tubular filler of vertical placement.Waste gas is discharged from TBF bottom centre gas vent after purifying.The nutrient solution addition is about 6.0L/d.Maintain operation under the room temperature (20～30 ℃).This research sells, adopts the polyurethane sponge that foaming makes (the clean pure filtering material in Shenzhen Co., Ltd, Chinese Guangdong province Shenzhen) as the filler of TBF with the ordinary city place.The performance parameter of tubular filler is: porosity: 30PPI; Thickness: 30mm; Internal diameter: 80mm; External diameter: 140mm; Highly: 100mm; Outside area: 0.4396m
2Inboard area: 0.2512m
2Volume: 1.0362L.The concrete structure of tubular type biofilter and size and test method are seen data.
The service condition of setting the tubular type biofilter is: time of staying 15s, organic loading are 11.2kg CODm
-3d
-1, the air inlet toluene concentration is 620mg/m
3After one month, toluene removal efficient is greater than 50%, and performance is always stable, and the toluene concentration of giving vent to anger is lower than 300mg/m
3Record reactor loss in head with pressure gauge and be lower than 20Pa.Continuing the operation two weeks, at first is to be covered with the yellowish-brown biomembrane on the outer surface of tubulose polyurethane sponge filler.Along with the increase of biofilm biomass, biomembrane is assembled agglomerating, stretches out outward about filler 5mm.At this moment, biomembrane is excessively accumulated and has been occurred in filler skin and shallow-layer.Simultaneously, reactor performance runs down, and toluene removal efficient finally is lower than 20%.This moment, loss in head was greater than 30Pa.
Cultivate two adult bombay canaries of screening, put into from tubular type biofilter air inlet.After these two blattarias enter reactor, can only be movable in the cavity that tubular filler outer surface, reactor wall and nutrient solution distributor surround.Through observing, it moves freely, often lies prone on the surface of filler.Reactor all operations condition is constant, continues operation.
Behind the two weeks, outwards an outstanding biomembrane bunch group fades away, and naked eyes can only be seen the shallow-layer of filler and the internal layer more biomembrane that distributed, and the problem that biomembrane is excessively accumulated has obtained effective control.Two blattarias in reactor, live and ruuning situation more stable, without unusual situation.Reactor performance takes a turn for the better gradually, and toluene removal efficient rises to more than 50% gradually, and loss in head has been lower than 20Pa gradually.
Continue operation one month, the biomembranous phenomenon of excessively accumulating does not occur.Reactor performance is also highly stable, and the toluene removal stabilised efficiency is more than 50%, and loss in head is lower than 20Pa, and they all do not have to occur significantly fluctuation.This shows, utilize blattaria effectively to control and biomembranously in the tubular type biofilter excessively accumulate, and can keep the removal capacity of long-term continous-stable.
Claims (1)
1. a method of controlling excessive biomembrane accumulation in gas-phase biofilter is characterized in that dropping into the Insecta Blattaria animal adult of some toward excessively accumulating biomembranous gas phase biological filtering device, and concrete quantity is per 0.05～0.5m
2Filler 1 the Insecta Blattaria animal adult of batching is used for eating the surface of biofilter packing layer and the biomembrane that accumulate at the shallow-layer place; The Insecta Blattaria animal adult of dropping into is to move in open-air kind, and they can be take the organic matter of corruption as staple food; The biofilter of excessively accumulating for the method control biomembrane seals, between filler outer surface and the biofilter inwall certain space is arranged, the space that the accumulation of biofilter filler forms and the hole aperture of filler itself are less, all should be less than 0.5cm, the adult of Insecta Blattaria animal can not creep into the eat biomembrane of packing layer depths of space or hole, but can be freely movable and can not climb out of biofilter; Described biofilter filler adopts inert material to make, and is not the food of Insecta Blattaria animal adult.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105044737A CN101992022B (en) | 2010-10-13 | 2010-10-13 | Method for controlling excessive biomembrane accumulation in gas-phase biofilter |
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| CN2010105044737A CN101992022B (en) | 2010-10-13 | 2010-10-13 | Method for controlling excessive biomembrane accumulation in gas-phase biofilter |
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| CN101992022B true CN101992022B (en) | 2013-01-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102500228B (en) * | 2011-10-31 | 2014-04-02 | 长沙理工大学 | Method for controlling excessive accumulation of biological membranes in biological trickling filter |
| CN108479377A (en) * | 2018-03-29 | 2018-09-04 | 东莞市环境科学研究所 | Organic waste gas treatment equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1181027A (en) * | 1995-04-07 | 1998-05-06 | 陶玛斯有限公司 | Self-cleansing filter |
| CN1430582A (en) * | 2000-05-22 | 2003-07-16 | 道玛斯专有有限公司 | Improved biofilter |
| KR20040005086A (en) * | 2002-07-08 | 2004-01-16 | 엘지건설 주식회사 | Excess biomass removal method within biofilter using sonification |
| CN101264421A (en) * | 2008-03-20 | 2008-09-17 | 湖南大学 | Biological filtering device for treating toluene gas |
| WO2008141375A1 (en) * | 2007-05-18 | 2008-11-27 | Buono-Net Australia Pty Ltd | Filter module |
-
2010
- 2010-10-13 CN CN2010105044737A patent/CN101992022B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1181027A (en) * | 1995-04-07 | 1998-05-06 | 陶玛斯有限公司 | Self-cleansing filter |
| CN1430582A (en) * | 2000-05-22 | 2003-07-16 | 道玛斯专有有限公司 | Improved biofilter |
| KR20040005086A (en) * | 2002-07-08 | 2004-01-16 | 엘지건설 주식회사 | Excess biomass removal method within biofilter using sonification |
| WO2008141375A1 (en) * | 2007-05-18 | 2008-11-27 | Buono-Net Australia Pty Ltd | Filter module |
| CN101264421A (en) * | 2008-03-20 | 2008-09-17 | 湖南大学 | Biological filtering device for treating toluene gas |
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