CN102500229B - Method for regulating and controlling biomass liveweight in gas-phase biofilter - Google Patents
Method for regulating and controlling biomass liveweight in gas-phase biofilter Download PDFInfo
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- CN102500229B CN102500229B CN201110337033.1A CN201110337033A CN102500229B CN 102500229 B CN102500229 B CN 102500229B CN 201110337033 A CN201110337033 A CN 201110337033A CN 102500229 B CN102500229 B CN 102500229B
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- psychodidae
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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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 regulating and controlling biomass liveweight in a gas-phase biofilter, which belongs to the field of waste gas treatment by a biological filtration method in the atmosphere pollution control engineering in the environmental engineering. A certain quantity of psychodidae eggs or larva are fed into a gas-phase biofilter which runs successively, psychodidae swallows biological films accumulated in packing of the biofilter or biological films at the bottom and on the periphery of a reactor, the quantity of psychodidae larva and adults in the reactor is monitored in real time, when the quantity of the psychodidae larva and adults is excess, a part of the psychodidae is killed by means of spraying pesticide, and the storage quantity of the biological films in the reactor is adjusted and controlled by means of adjusting and controlling the quantity of live psychodidae. In the method, the live psychodidae insects are adopted to remove excessively accumulated or aged biological films in the reactor under the condition without adding running equipment or changing operation conditions of the biofilter, balance of the biomass liveweight in the reactor is maintained, so that long-term stable running performances of the reactor are obtained, and the method has the advantages that the method is simple and convenient in operation, and is economical, effective, environment-friendly and the like.
Description
Technical field
The biofiltration process that the invention belongs to Air Pollution Control Engineering in environmental project is processed waste gas field, particularly a kind of regulate and control the method for biomass liveweight in gas-phase biofilter.
Background technology
The discharge of stench and organic exhaust gas severe contamination environment, cause crop production reduction, destroy forest and the ecosystem, consume ozone and form photochemical fog, damage directly or indirectly health, even carcinogenic and teratogenesis.Gas phase biological filtering technology is the main biological control method of the one of organic exhaust gas, and it utilizes the biomembrane being attached on filter packing, and the pollutant in waste gas is decomposed, is converted into simple inorganic matter (CO
2, H
2o etc.) or cell component.Except providing the essential nutriment of microbial life metabolism, biofiltration process does not generally need to add other medicaments, has the advantages such as investment operating cost is low, effect better, non-secondary pollution, therefore has broad application prospects.
Biomembrane is the most critical factor of bio-filter technology.In filler, equally distributed appropriate highly active biomembrane contributes to obtain the reactor runnability of efficient stable.But gas phase biological filtering device usually there will be after long-term operation excessively accumulates phenomenon in biomembrane aging phenomenon and filler, particularly under high-load condition.This just may directly cause gas phase biological filtering device to occur numerous operational issues, such as the problems such as bed obstruction, short stream, pressure drop increase, the arch-criminal that while also just having become directly to cause reactor to move for a long time, handling property sharply worsens.
At present, the control method that biomembrane is excessively accumulated can be divided into physics, chemistry and biological method etc.Physical method utilizes plant equipment to remove excessive biomembrane, and it 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 complexity, operation maintenance difficulty.Chemical method is supplied carbon source by control and is added 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.Physics and chemistry method all cannot keep the performance of the long-term continous-stable of reactor.It is based on ecological basic principles such as ecological pyramids, trophic level and grazing food chains that biological method control biomass is excessively accumulated, introduce the living species in higher trophic level, reduce the living species quantity in lower trophic level by the predation of grazing food chain.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 biomass productive rate will reduce greatly.But it is still in the Primary Study stage.Up to the present also do not find the method that biomembrane is excessively accumulated of controlling cost-effectively.
In applying biological method control gas phase biological filtering device, biomembranous research of excessively accumulating and patented technology are also less.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) contributes to excessive increase and the pressure head of controlling fungi to reduce.(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) compare some and comprised food meat nematode (Caenorhabditis sp.) containing the predator of micro-metazoa, wheel animalcule (Phildina sp.), arthropod (Echiniscus sp.) and infusorian protozoan comprise Colpoda inflata, Euplotes harpa and Acineria sp., find nematode, wheel animalcule and infusorian are all adapted within the scope of wider pollutant levels, growing and being stabilized in some.And utilize microfauna prey control biomass to accumulate still in elementary or experimental stage.In the patent application of China, existing utilize nematode and infusorian to biomembranous eat for control the biomass accumulated in gas phase biological filtering device (biological control method that in a kind of waste gas biofilter, biomass is excessively accumulated. application number: 201010523343.8; The applying date: 2010.10.28).In addition, utilize Insecta Blattaria animal adult the eat surface of biofilter packing layer and the biomembrane that accumulate at shallow-layer place, and then the biomembrane of excessively accumulating in control filler be also applied patent of invention (a kind of method of controlling excessive biomembrane accumulation in gas-phase biofilter. application number: 201010504473.7, applying date: 2010.10.13).But, utilize and control about moth midge class insect the method that biomembrane excessively accumulates and there is not yet report.
Moth Heleidae is the small Nematocera insect to small-sized crinosity or palea.Head is little and slightly flat, about compound eye away from, without simple eye; Feeler is long, with approximately grade or longer of cephalothorax, is made up of verticillate becoming mildewed 12 ~ 16 joints; The maxillar palpus of mouthpart is long and tortuous, 4 or 5 joints, and beak is short and the property person that sucks blood is long.Thick and the back side knuckle of chest, escutcheon circle; Foot is shorter or elongated, and tibia is distance for no reason.Wing base portion is narrow and end is sharp or round, is often fusiformis; Close raw fine, soft fur on wing edge and arteries and veins, minority also has scale, and chi pulse longitudinal vein is many and obviously, has at least 9 to stretch and reach wing edge, and transverse vein is few and aobviously only have in wing base portion, and basal cell is short and small; How short Sc is or imperfect, and R divides 4 or 5, and M divides 3 or 4, only 1 of Cu, and A is very short or degenerate.Belly tubular, 6 ~ 8 joints, exterior paramera is flourishing and appear, and female oopod is outstanding.The elongated tubular of larva, full head dummy, apodia, amphipneusta or metapneustic type, body 12 ~ 14 joints, body dorsal part has ossified sheet more, and it is mobile that flank face often has puff to help, and metapneustic valve is positioned on a short and thick pipe; The many bristles of body or bar-shaped hair, abdomen end often becomes mildewed or the jewelry such as hairbrush; Aquatic larva also has tracheal gill and adheres to the suction disk-like structure of use.Larva mostly is saprophagous character or coprophagy, lives in the rotten grass of rotten wood and soil, and some is lived in sewer, is common in indoor after emergence.The larva of hickie moth buffalo gnat and star spot moth buffalo gnat, in city, mainly multiplies and is containing corrupt organic shallow water territory.In the higher seeping container of outdoor alluvial gutter, septic tank and some organic matters, also can find the trace of moth buffalo gnat larva.Moth buffalo gnat adult after emergence is parked on wall mostly nearby.
The method of preventing and treating of moth midge is a lot, and the daily method of preventing and treating can be cleaned environment, the organic matter of removing ponding and gathering.Chemical method is very practical, the Growth and reproduction of can spray diflubenzuron, the medicament such as the young urea that goes out, flufenoxuron, chitin synthesis inhibitor, (plan) Dalmatian chrysanthemum lipid medicine thoroughly being controlled moth midge.This amount of survival for moth midge class insect in effective control enclosed environment provides direct basis.Find by further investigation, utilize the biomass in moth midge regulation and control gas phase biological filtering device to there is important practical value.
Summary of the invention
The object of the invention is to remove excessive accumulating or aging biomembrane in gas phase biological filtering reactor, keep appropriate highly active biomembrane, maintain the runnability of reactor long-term stability, process stench or organic exhaust gas for biologic filtration method a kind of biological method that regulates and controls cost-effectively biomembrane accumulation is provided.
The method that the present invention regulates and controls biomass liveweight in gas-phase biofilter is the gas phase biological filtering device of successful operation to be dropped into moth midge worm's ovum or the larva of some, for the biomembrane accumulated in the biofilter filler of eating or the biomembrane of reactor bottom and periphery; And monitor in real time the quantity of moth midge larva and adult in reactor, in the time of excess, spraying agent is killed part moth midge; It is filler that the gas phase biological filtering reactor of accumulating biomass for this method control adopts the inert material of non-moth midge food, and reactor is airtight, and moth midge is can be therein freely movable and can not go out.The method of control excessive biomembrane accumulation in gas-phase biofilter of the present invention comprises the steps:
(1) from environment contamination, screening separates or artificial worm's ovum or the larva of cultivating take corrupt organic matter as the moth midge class insect of food;
(2) seal and the filling kind of inspection biofiltration reactor, determine supply volume and release position, and guarantee the operation condition of good biological control method;
(3) the screening animal of some is sprayed into reactor with solution, directly contact with the excessive biomembrane of accumulating, and the temperature that controls environment is at 15 ~ 30 ℃, continue stable operation reactor, constantly the moth midge larva of hatching and the adult biomembrane of eating in reactor;
(4) according to the handling property of reactor and running status, monitor in real time weather and the quantity of moth midge class animal, in the time of excess, spraying agent is killed part moth midge.
Described moth midge worm's ovum or larva, for moth buffalo gnat kind common in environment contamination, add place near exhaust gas inlet end, and adding density is 0.1/cm of 0.001 –
3filler.
The method of described regulation and control biomass liveweight in gas-phase biofilter, when the quantity of moth midge larva and adult in real-time monitoring reactor exceedes 0.5/cm
3filler or occur that reactor performance kills moth midge because biomass reduces spraying agent while sharply reducing, but to guarantee that the quantity of active worm's ovum or larva is greater than 0.001/cm
3filler.
Described kill that moth midge medicament used is mainly diflubenzuron, the young urea that goes out, flufenoxuron, chitin synthesis inhibitor, organophosphorus pesticide, (plan) Dalmatian chrysanthemum lipid medicine.
Beneficial effect:
Essence of the present invention is based on ecological basic principle, utilize moth midge class insect common in environment contamination take corrupt organic matter as staple food, adaptable feature, excessive the accumulating or aging biomembrane in reactor of eating, and reach the object of the biomass in regulation and control gas phase biological filtering device by the amount of survival of spraying agent control moth midge class insect.The present invention can be in the situation that not increasing operational outfit, not changing biofilter service condition, only remove excessive accumulating or aging biomembrane in reactor by the moth midge class insect of survival, thereby the biomembrane accumulation in regulation and control reactor, and then the runnability of the long-term continous-stable of lifting biofilter.
Compared with prior art, advantage of the present invention is just:
1, do not need to increase operational outfit, do not need not change biofilter service condition, only eat and remove excessive accumulating or aging biomembrane by adding moth midge class insect, be conducive to maintain 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
Regulate and control the method for biomass liveweight in gas-phase biofilter below by specific embodiment narration the present invention.Unless stated otherwise, in the present invention, technological means used is method known in those skilled in the art.In addition, embodiment is interpreted as illustrative, but not limits the scope of the invention.
Example 1 is by control survive biomembranous accumulation and activity in the bio-trickling filter of regulating and controlling of quantities filled polyurethane sponge filler of moth buffalo gnat
Bio-trickling filter (Biotrickling filter, BTF) has been successfully applied to Low Concentration Toluene waste gas in processing.In the present embodiment, use the BTF of experimental size, filled polyurethane sponge filler for investigating object, the environment temperature of reactor operation is 20 ~ 30 ℃.It is is mainly imported and exported and is formed by cylindricality urceolus, polyurethane sponge filler, liquid spray thrower, gas/liquid body.Cylindricality urceolus adopts lucite tube material, internal diameter 10 cm, tube wall 0.5 cm, high 120 cm.Inside establish three layers of fillers, every layer of 20 cm by porous sieve plate support, all arrange spray thrower above every layer of filler.The air-tightness of BTF is good, and waste gas enters through the gas feed at center, BTF top, and from top to down through covering with biomembranous polyurethane sponge filler, after purifying, waste gas is discharged from the gas vent of BTF bottom.Nutrient solution is made up of multiple magnanimity nutrient, micronutrient element, vitamin and pH buffer etc., includes the required various nutriments of growth of microorganism.Spray thrower by each layer of filler top adds, and spray flux is about 10.0 L/d.Reactor maintains operation under room temperature (20 ~ 30 ℃).The filler of BTF is the polyurethane sponge that adopts place, ordinary city to sell, adopt foaming to make, and its porosity is 20 PPI.
The service condition of setting BTF is: the time of staying 15 s, air inlet toluene concentration is 600 mg/m
3.Adopt the mud of certain sewage treatment plant's second pond to carry out biofilm.After one month, toluene removal efficiency is greater than 90%, and performance is always stable, and the toluene concentration of giving vent to anger is lower than 60 mg/m
3.Record reactor loss in head lower than 100 Pa with pressure gauge.Increase again air inlet toluene concentration to 2400 mg/m
3.Maintain other service condition constant, continue a two weeks of operation, find that the top of upper strata polyurethane sponge filler has been covered with light yellow biomembrane, and be covered with the inwall of cylindricality urceolus, part biological film is assembled agglomerating, stretches out filler 5 mm left and right outward.Naked eyes can not have been seen by transparent organic glass tube the filler of the inside clearly.Now, all there is to some extent the biomembranous excessive phenomenon of accumulating in reactor intermediate filler layer and lower floor.Meanwhile, reactor performance sharply worsens, and toluene removal efficiency sharply reduces, and finally lower than 30%, outlet toluene concentration is greater than 1600 mg/m
3.Now reactor inner ram loss is greater than 300 Pa.
From environment contamination, screen and separate moth midge worm's ovum and larva, quantity is about 200, is sprayed on the filler of reactor with nutrient solution.Maintain other condition constant, continue operation reactor institute, moth midge worm's ovum and larva start constantly growth in reactor, breeding.After one week, the turbid material of lucite inside pipe wall reduces gradually, and the strip small worm of a small amount of pitchy is attached in tube wall and filler.The performance of reactor is gone up gradually, and loss in head is 240 Pa.After fortnight, a small amount of moth shape insect appears in reactor internal cavity, and the quantity of strip small worm increases greatly, and the biomembranous amount of excessively accumulating significantly reduces, and toluene removal efficiency is elevated to more than 95%, and reactor loss in head is 105 Pa.After one month, a large amount of moth shape insects are attached on reactor wall, and the quantity of strip small worm is growing on and on, lucite inside pipe wall is very clean, on polyurethane sponge filler, be difficult to naked eyes and find the biomembrane of accumulating, and reactor performance obviously reduces, outlet toluene concentration is greater than 1000 mg/m
3, loss in head is less than 30 Pa.
Bio-trickling filter out of service, uses common commercially available 50% fenvalerate. and phoxim emulsifiable concentrate (complete rich cyanogen is pungent) 1 mL is mixed with solution by 1:1000, is evenly sprayed onto filler from each layer of mouth spray.After half an hour, a large amount of moth midge adults drop to above filler or reactor bottom.After two hours, substantially can't see the insect of flying.Maintain other service condition constant, continue operation reactor.Two days later, the performance of reactor is gone up gradually, and toluene removal efficiency raises gradually, and outlet toluene concentration is less than 950 mg/m
3.After one week, more than the performance recovery to 90% of reactor, the biomembrane in BTF filler slowly increases, and naked eyes start to see a small amount of biomembrane, and have the strip small worm of several pitchies to be attached on tube wall and filler in.
Claims (3)
1. regulate and control a method for biomass liveweight in gas-phase biofilter, it is characterized in that the gas phase biological filtering device of successful operation from dropping into 0.1/cm of 0.001 – near exhaust gas inlet end
3moth buffalo gnat insect worm's ovum or the larva of filler, for the biomembrane of the biomembrane accumulated in the gas phase biological filtering device filler of eating or its bottom and periphery; The quantity of moth buffalo gnat larva and adult in monitoring gas phase biological filtering device in real time, in the time of excess, spraying agent is killed part moth buffalo gnat insect; The gas phase biological filtering device of accumulating biomass for this method control is airtight and adopts the polyurethane sponge inert material of non-moth buffalo gnat food is filler, and moth buffalo gnat adult or larva are can be therein freely movable and can not go out.
2. the method for regulation and control biomass liveweight in gas-phase biofilter according to claim 1, is characterized in that exceeding 0.5/cm when the quantity of moth buffalo gnat insect larvae and adult in real-time monitoring gas phase biological filtering device
3filler or occur that gas phase biological filtering device performance kills moth buffalo gnat insect because biomass reduces spraying agent while sharply reducing, but must guarantee that the quantity of active worm's ovum in gas phase biological filtering device or larva is greater than 0.001/cm
3filler.
3. the method for regulation and control biomass liveweight in gas-phase biofilter according to claim 1, is characterized in that killing that moth buffalo gnat insect medicament used is mainly diflubenzuron, the young urea that goes out, flufenoxuron, chitin synthesis inhibitor, organophosphorus pesticide, Dalmatian chrysanthemum lipid medicine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110337033.1A CN102500229B (en) | 2011-10-31 | 2011-10-31 | Method for regulating and controlling biomass liveweight in gas-phase biofilter |
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| CN201110337033.1A CN102500229B (en) | 2011-10-31 | 2011-10-31 | Method for regulating and controlling biomass liveweight in gas-phase biofilter |
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| CN102500229A CN102500229A (en) | 2012-06-20 |
| CN102500229B true CN102500229B (en) | 2014-05-28 |
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Citations (2)
| 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 |
| CN102008890A (en) * | 2010-10-28 | 2011-04-13 | 南昌航空大学 | Biological control method for biomass excessive accumulation in waste gas biofilter |
-
2011
- 2011-10-31 CN CN201110337033.1A patent/CN102500229B/en not_active Expired - Fee Related
Patent Citations (2)
| 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 |
| CN102008890A (en) * | 2010-10-28 | 2011-04-13 | 南昌航空大学 | Biological control method for biomass excessive accumulation in waste gas biofilter |
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| Publication number | Publication date |
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| CN102500229A (en) | 2012-06-20 |
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