WO1994014523A1 - Method of treating contaminated media in dust form - Google Patents
Method of treating contaminated media in dust form Download PDFInfo
- Publication number
- WO1994014523A1 WO1994014523A1 PCT/EP1993/003654 EP9303654W WO9414523A1 WO 1994014523 A1 WO1994014523 A1 WO 1994014523A1 EP 9303654 W EP9303654 W EP 9303654W WO 9414523 A1 WO9414523 A1 WO 9414523A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air
- container
- bioreactor
- medium
- fed
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/02—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by biological methods, i.e. processes using enzymes or microorganisms
-
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
- A62D2101/26—Organic substances containing nitrogen or phosphorus
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2203/00—Aspects of processes for making harmful chemical substances harmless, or less harmful, by effecting chemical change in the substances
- A62D2203/10—Apparatus specially adapted for treating harmful chemical agents; Details thereof
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Definitions
- the invention relates to a method and a device for the treatment of dusty media, in particular contaminated with flammable liquid hydrocarbons and / or easily releasable cyanides.
- the dusts also accumulate during repair work on the gas transmission lines (pipelines).
- AGEN Storage in barrels is problematic, since the dusty medium thus contains outgassing constituents, the boiling point of, for example, benzene is only 80 ° C and, due to the resulting vapor pressures, inflate the barrels, and due to the lower explosion limit of, for example, benzene of only 1.2 vol % an explosive atmosphere forms inside the barrels.
- the flammable liquid hydrocarbons prevent storage underground, the toxic cyanide components prevent storage over the day and the sulfur components are at least undesirable in incineration plants, in some cases combustion is completely rejected.
- the object of the invention is to propose a method and a device for treating these contaminated dust-like media, which enables disposal in accordance with the provisions of the Waste Act.
- the process becomes particularly simple in that the contaminated dust-like medium does not have to be moved at all. It remains in its place in the container during the entire process, while air is introduced into this container, which is charged with these contaminants when flowing through the dust-like contaminated medium and then leaves the container again. This air is then exposed in a bioreactor to the influence of the microorganisms, which have been shown to degrade the contaminants very effectively. The cleaned air then leaves the bioreactor together with the degradation products, which are water (H "0) and carbon dioxide (CC), and is released into the environment.
- H "0) and carbon dioxide (CC) water
- CC carbon dioxide
- the microorganisms feed themselves automatically from the degradation of the contaminants.
- the contaminated dusty media are automatically freed of their contaminants during the process. If these are removed or have dropped below a threshold value, the dusty medium can be removed from the process and disposed of. It then also contains mineral constituents such as sulfur or iron oxides and, depending on the duration of the treatment, more or fewer cyanides, which as such no longer pose major problems as such in the normal disposal and can possibly be operated with less high-quality disposal systems.
- the air enriched with contaminants is first fed to a humidifier before it reaches the bioreactor.
- an additional cleaning is preferably carried out via an activated carbon filter before the cleaned air is removed.
- the contamination content of the exhaust air is measured before being fed into the bioreactor and, depending on the measurement result, the flow velocity of the supply air and / or a room or container heater and / or controlled by pre-heating air temperature of the supply air.
- the air air which is contaminated or loaded with contaminants, is mixed in from the outside before it reaches the bioreactor.
- This admixture allows the impurity level to be kept at an approximately constant desired value, which is particularly favorable for the microorganisms and / or has proven to be particularly effective for reducing the contaminants. If, for example, a new container or a new drum is introduced into the system, the proportion of pollutants in the exhaust air from this container into the bioreactor will be very high, since the proportion of pollutants in this container remains unchanged at its upper value. This proportion of pollutants can be reduced by adding a relatively large amount of supply air. The total amount of the mixture can be regulated by the pre-discussed control of the total supply.
- a device according to the invention for the disposal of dusty media is characterized by a container for holding the medium, a supply device for air into the medium in the container, and a discharge device for removal of air enriched in the container with impurities, a bioreactor to which the air is supplied from the discharge device and an exhaust device for discharging the biologically cleaned air.
- the container consists of a fixed cover and a removable, replaceable lower part.
- an air humidifier is switched on in the discharge device between the container and the bioreactor.
- An air preheating unit is likewise preferably provided, which preheats the supply air before it is fed into the container. Preheated air tends to result in a better transfer of the contaminants from the dusty medium into the air.
- an activated carbon filter is preferably provided, into which the cleaned air is led out of the bioreactor before it is released. Final cleaning can be carried out here again.
- a sensor is preferably connected to the exhaust air unit behind the bioreactor and is connected to an alarm device to indicate a malfunction and / or a control system to shut down the system.
- a sensor is preferably connected to the exhaust air line upstream of the bioreactor, the output side of which is connected to a controller, which in turn is connected to the
- Air preheating unit and / or a pump for controlling the flow rate of the supply air and / or a space or container heater is connected.
- This sensor can be used to convert the falling degree of contamination in the course of cleaning into an increase in the flow rate of the supply air, as a result of which sufficient food is constantly supplied to the microorganisms or microorganisms.
- the optimal heat can also be set.
- the sensor can also be used to keep the level of pollution of the air that is fed to the bioreactor at about the same level.
- a mixing device is provided in a preferred embodiment, with which unloaded supply air is admixed with the air fractions laden with impurities before they enter the bioreactor.
- the design with the removable, interchangeable container also has considerable additional advantages.
- the microorganisms need a certain amount of time to develop and to ensure optimal degradation of the contaminants. It is therefore to be expected that the system will take several weeks to arrive. By easily changing the container, it can be avoided that the system must be shut down each time another contaminated dusty medium is to be cleaned. All that has to be done is to remove the old container, which only contains cleaned dust-like medium, and to place the new container.
- Fig. 1 shows schematically the structure of a device according to the invention.
- the device represents a dust decontamination system.
- Air is passed through a pump 1 via a feed device 2, here dip tubes, into the vicinity of the bottom of a container 3, which can be a barrel-like vessel.
- a feed device 2 here dip tubes
- the container 3 filled with a certain amount of contaminated dusty medium 4 up to a certain height is closed with a lid 5. It can be removed from this cover 5 together with the medium 4 contained in it.
- the feed device 2, here the dip tubes, is arranged on the cover side and remains in the device when the container 3 is removed.
- the air rising in the dust-like medium from the lower end of the immersion tubes (indicated by arrows) is enriched with pollutants depending on the operating temperature and flow rate and leaves the air space above the dust-like medium through a discharge device 6, here an exhaust air pipe which passes through the cover 5 protrudes and is plant-proof.
- the discharge device 6 leads the air into a downstream humidifier 7.
- the air is humidified to such an extent that optimal conditions for microorganisms or microorganisms arise.
- the air is guided from the humidifier 7 to a bioreactor 8.
- the microorganisms are located inside the bioreactor 8. These do not have to belong to any special culture; however, an approach made from rotted bark, compost and lava slag has proven itself in practice.
- the cleaned air is passed on to an activated carbon filter 9.
- the activated carbon filter 9 represents a safety measure in the event of failure of the bioreactor 8 or for the absorption of harmful secondary components. From the activated carbon filter 9, the cleaned air, which only contains the decomposition products C0 ? and H ? 0 contains, released to the environment.
- the pollutant load is measured with a sensor 10 in front of or behind the humidifier 7 and fed to a controller 11.
- this influences various other components of the system, the influence being indicated by dashed lines a, b c and d. Therefore, a) the flow rate of the supply air in the supply device 2 determined by the pump 1 is influenced,
- This influencing takes place in the sense of a setpoint predetermined on the controller 11.
- the system (as shown) is housed in a heat-insulated room 14.
- the amount of dust or the dust-like medium 4 is subjected to the process until the pollutant load measured by the sensor 10 reaches a predetermined minimum or falls below a corresponding threshold value.
- the failure of the biofilter of the bioreactor is detected by a sensor 15 and e.g. used for alarm or shutdown of the entire system, which is indicated in the drawing by influencing the pump 1.
- the method according to the invention enables the environmentally friendly decontamination of the dust and the mineralization of its biodegradable components.
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Toxicology (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL93309243A PL309243A1 (en) | 1992-12-24 | 1993-12-21 | Method of and apparatus for processing dusty contaminated materials |
EP94904172A EP0675753A1 (en) | 1992-12-24 | 1993-12-21 | Method of treating contaminated media in dust form |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4244125A DE4244125A1 (en) | 1992-12-24 | 1992-12-24 | Process for the treatment of dusty contaminated media |
DEP4244125.0 | 1992-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994014523A1 true WO1994014523A1 (en) | 1994-07-07 |
Family
ID=6476567
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1993/003654 WO1994014523A1 (en) | 1992-12-24 | 1993-12-21 | Method of treating contaminated media in dust form |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0675753A1 (en) |
CZ (1) | CZ167395A3 (en) |
DE (1) | DE4244125A1 (en) |
PL (1) | PL309243A1 (en) |
WO (1) | WO1994014523A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL423711A1 (en) * | 2017-12-04 | 2019-06-17 | Politechnika Śląska | Method for obtaining degradable hydrogels based on derivatives of trehalose and their applications |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109569266A (en) * | 2017-09-28 | 2019-04-05 | 中国石油化工股份有限公司 | The administering method of petrifaction sewage treatment plant exhaust gas |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0274986A1 (en) * | 1986-12-05 | 1988-07-20 | Ciba-Geigy Ag | Waste gas purification process |
DE4001558C1 (en) * | 1990-01-20 | 1991-04-18 | Biodetox Mbh Gesellschaft Zur Biologischen Schadstoffentsorgung Mbh, 3061 Ahnsen, De | Decontaminating soil contg. mineral oil hydrocarbon - by three-stage biological degradation of contaminants under non-aerobic and aerobic conditions |
EP0429137A1 (en) * | 1989-11-21 | 1991-05-29 | Dsm N.V. | Process for the in-situ removal of pollutants from the soil |
DE4104756A1 (en) * | 1991-02-15 | 1992-08-20 | Envicon Eng Gmbh | Purificn. of water contg. chlorinated or halogenated hydrocarbon(s) - comprises extn. of hydrocarbon(s) by bubbling air through water and air is then purified using a biological treatment procedure |
DE4114024A1 (en) * | 1991-04-29 | 1992-11-05 | Kessler & Luch Gmbh | Biological air cleaner - uses preheated water for air washer to keep microorganisms active during all seasons |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3739126A1 (en) * | 1987-11-19 | 1989-06-01 | Schuette Reiner | Process and system for decontaminating a soil zone |
DE3905133A1 (en) * | 1988-05-26 | 1989-11-30 | Zueblin Ag | Process for removing readily volatile constituents from soils |
DE4014023A1 (en) * | 1990-05-02 | 1991-11-07 | Bosch Gmbh Robert | Decontamination of substance contg. cyanide, esp. waste water - by treatment with acid, and stripping and destruction of hydrogen cyanide formed |
-
1992
- 1992-12-24 DE DE4244125A patent/DE4244125A1/en not_active Withdrawn
-
1993
- 1993-12-21 PL PL93309243A patent/PL309243A1/en unknown
- 1993-12-21 EP EP94904172A patent/EP0675753A1/en not_active Withdrawn
- 1993-12-21 WO PCT/EP1993/003654 patent/WO1994014523A1/en not_active Application Discontinuation
- 1993-12-21 CZ CZ951673A patent/CZ167395A3/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0274986A1 (en) * | 1986-12-05 | 1988-07-20 | Ciba-Geigy Ag | Waste gas purification process |
EP0429137A1 (en) * | 1989-11-21 | 1991-05-29 | Dsm N.V. | Process for the in-situ removal of pollutants from the soil |
DE4001558C1 (en) * | 1990-01-20 | 1991-04-18 | Biodetox Mbh Gesellschaft Zur Biologischen Schadstoffentsorgung Mbh, 3061 Ahnsen, De | Decontaminating soil contg. mineral oil hydrocarbon - by three-stage biological degradation of contaminants under non-aerobic and aerobic conditions |
DE4104756A1 (en) * | 1991-02-15 | 1992-08-20 | Envicon Eng Gmbh | Purificn. of water contg. chlorinated or halogenated hydrocarbon(s) - comprises extn. of hydrocarbon(s) by bubbling air through water and air is then purified using a biological treatment procedure |
DE4114024A1 (en) * | 1991-04-29 | 1992-11-05 | Kessler & Luch Gmbh | Biological air cleaner - uses preheated water for air washer to keep microorganisms active during all seasons |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL423711A1 (en) * | 2017-12-04 | 2019-06-17 | Politechnika Śląska | Method for obtaining degradable hydrogels based on derivatives of trehalose and their applications |
Also Published As
Publication number | Publication date |
---|---|
DE4244125A1 (en) | 1994-06-30 |
CZ167395A3 (en) | 1996-03-13 |
PL309243A1 (en) | 1995-10-02 |
EP0675753A1 (en) | 1995-10-11 |
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