DE19512540A1 - Waste water from vehicle wash plants to be reused in washing process - Google Patents

Waste water from vehicle wash plants to be reused in washing process

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Publication number
DE19512540A1
DE19512540A1 DE1995112540 DE19512540A DE19512540A1 DE 19512540 A1 DE19512540 A1 DE 19512540A1 DE 1995112540 DE1995112540 DE 1995112540 DE 19512540 A DE19512540 A DE 19512540A DE 19512540 A1 DE19512540 A1 DE 19512540A1
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DE
Grant status
Application
Patent type
Prior art keywords
water
lt
nm
ultraviolet light
waste water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE1995112540
Other languages
German (de)
Inventor
Martin Dr Trageser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vitatec Uv-Systeme 63579 Freigericht De GmbH
VITATEC UV SYSTEME GmbH
Original Assignee
Vitatec Uv-Systeme 63579 Freigericht De GmbH
VITATEC UV SYSTEME GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/30Treatment of water, waste water, or sewage by irradiation
    • C02F1/32Treatment of water, waste water, or sewage by irradiation with ultra-violet light
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/44Nature of the water, waste water, sewage or sludge to be treated from vehicle washing facilities

Abstract

Waste water from vehicle wash plants is treated with UV light, activators and oxidants to break down tensides, hydrocarbons and washing aids, so that the purified water can be used again in the washing process.

Description

Die Erfindung betrifft ein Verfahren zur Aufbereitung von Abwasser und Kreis laufwasser aus Fahrzeugwaschanlagen durch Verwendung von ultraviolettem Licht, Aktivatoren und Oxidantien nach vorhergehender Filtration. The invention relates to a method for treating wastewater and circulation water from car wash facilities by using ultraviolet light, activators and oxidants after previous filtration.

Bisher wird Wasser aus Fahrzeugwaschanlagen in der Regel mit Flockungsmittel ver setzt und die Inhaltsstoffe gefällt. So far, water from car washes is usually puts ver with flocculant and precipitated the ingredients. Der Schlamm wird als Sondermüll deponiert oder verbrannt. The sludge is disposed of as hazardous waste or burned. Nachteilig hierbei sind die hohen Kosten für die Entsorgung des anfallenden belasteten Schlammes und - vor allem in den Sommermonaten - eine starke Geruchsbildung durch Bakterienwuchs. The disadvantage here is the high cost for the disposal of the resulting contaminated sludge and - especially in the summer months - a strong odor due to bacterial growth.

Andere Verfahren verwenden Ozon zur Entkeimung und Reinigung des Abwassers aus den Fahrzeugwaschanlagen. Other methods use ozone for disinfection and cleaning of waste water from car washes. Ozon wird dabei in der Regel im Unterdruckverfah ren in ein wasserführendes Becken eingeleitet und tötet die Bakterien durch Erhöhung des Redoxpotentials (< 500 mV) ab. Ozone is this reindeer usually in Unterdruckverfah introduced into a water-bearing basins and kills the bacteria by increasing the redox potential (<500 mV) from. Ozon führt dabei aber nur in geringem Maße zum Abbau der Inhaftsstoffe, da die eingesetzten Mengen gering und das Oxidationspotential zu niedrig ist (+ 2,07 V). But ozone leads only to a limited extent to reduce Inhaftsstoffe because the amounts low and the oxidation potential is too low (+ 2.07 V). Nachteilig ist weiterhin, daß ein Austreten von Ozon in die Umwelt verhindert werden muß. A further disadvantage is that leakage of ozone must be prevented in the environment.

Bekannt ist weiterhin, daß auch biologische Verfahren zur Aufbereitung eingesetzt werden können. It is also known that biological methods can be used for the preparation. Die dabei eingesetzten Mikroorganismen bauen die im Wasser vor liegenden Schadstoffe bei Zugabe von Luft oder Sauerstoff ab. The microorganisms used therein degrade the front lying in the water pollutants with the addition of air or oxygen. Nachteilig ist hierbei, daß die Mikroorganismen sehr sensibel auf Schwankungen der Wasserinhaltsstoffe reagieren. The disadvantage here is that the microorganisms are very sensitive to fluctuations in the water contents. Dabei treten z. This might involve occurred. B. auch starke Geruchsbelästigungen auf. As well as strong odors on.

Die Aufgabe der Erfindung besteht darin, og verfahrenstechnische und sicherheits technische Nachteile zu vermeiden und ein verbessertes Verfahren für die Aufberei tung von Fahrzeugwaschanlagen-Abwasser zu finden. The object of the invention is to avoid the above procedural and safety-related disadvantages and to find an improved method for the processing of Aufberei car washes sewage.

Gegenstand der Erfindung ist die Verwendung von ultraviolettem Licht in Verbindung mit Aktivatoren zum Abbau der Inhaltsstoffe des Fahrzeugwaschanla gen-Abwassers. The invention relates to the use of ultraviolet light in conjunction with activators to reduce the contents of the gen-Fahrzeugwaschanla wastewater. Es ist bekannt, daß ultraviolettes Licht in Verbindung mit Aktivato ren organische Stoffe abbauen kann (DE 46 77 390). It is known that ultraviolet light in conjunction with ren Aktivato can degrade organic substances (DE 46 77 390).

Diese aktivierten Stoffe wie z. These activated substances such. B. Wasserstoffperoxid, usw. reagieren mit den Inhaltsstoffen und bauen diese im Wasser ab (DE 10 06 207). As hydrogen peroxide, etc. react with the ingredients and build it in the water (DE 10 06 207).

Die Erfindung zielt auf den Einsatz der UV-Bestrahlung zum Abbau von Tensiden, Kohlenwasserstoffen, wie sie in Waschmitteln und Reinigern für die Fahrzeugwäsche eingesetzt werden. The invention is directed to the use of UV irradiation to reduce surfactants, hydrocarbons, such as those used in detergents and cleaners for car wash.

Entgegen der heutigen Praxis wird hierzu ultraviolettes Licht mit Wellenlängen von < 200 nm und < 190 nm verwendet, was eine Verbesserung der Abbauleistung be wirkt. Contrary to current practice, this ultraviolet light with wavelengths of <200 nm and <190 nm is used, which works to improve the degradation efficiency be. Dabei werden die in das Abwasser in gelöster, suspendierter oder fester Form zugegebenen Aktivatoren mit ultraviolettem Licht < 200 nm bestrahlt, so daß Ra dikale mit einem hohen Oxidationspotential (< + 2,5 V) entstehen. The added in the waste water in dissolved, suspended or solid form activators are irradiated with ultraviolet light <200 nm, so that Ra cals with a high oxidation potential (<+ 2.5 V) produced. Diese reagieren dann mit den Inhaltsstoffen des Waschwassers insbesondere den Tensiden, Kohlen wasserstoffen und Waschmitteln und bauen diese im Wasser ab. These then react with the ingredients of the wash water in particular the surfactants, water and materials coal washing and build them in the water. Die Geschwindigkeit des Abbaus wird erhöht, indem in das Waschanlagenabwasser Luft eingeblasen wird, die vorher mit ultraviolettem Licht < 190 nm bestrahlt wurde. The rate of degradation is increased by air is blown into the wash waste water, the <190 nm was irradiated beforehand with ultraviolet light.

Durch die schnelle Reinigung des Waschanlagenabwassers kann das Verfahren im Durchfluß betrieben werden. Through the quick cleaning of the washing plant wastewater, the process can be operated in continuous flow. Eine Bestrahlungszeit von wenigen Minuten ist hierfür ausreichend. An exposure time of a few minutes is sufficient for this purpose.

Als allgemeines Beispiel sei der Abbau von Kohlenwasserstoffen mit ultraviolettem Licht dargestellt: As a general example of the degradation of hydrocarbons is shown with ultraviolet light:

Bei der quantitativen Umsetzung entstehen somit nur Kohlendioxid (CO₂) und Wasser (H₂O). In the quantitative reaction thus only carbon dioxide (CO₂) and water formed (H₂O).

Das erfindungsgemäße Verfahren erlaubt es, das behandelte Wasser ohne weitere chemische Behandlung wiederzuverwenden. The inventive method makes it possible to reuse the treated water without further chemical treatment. Dabei sollte aus ökonomischen Gründen der Aktivator-Einsatz wie auch die Bestrahlungsenergie auf den Wasserfluß und die gelösten Inhaltsstoffe angepaßt werden. Here, the activator application as well as the radiation energy to the flow of water and the dissolved constituents should be adjusted for economic reasons. Zur Vorabscheidung von ungelösten Sub stanzen sollte vor der UV-Behandlung eine Feinfiltration vorgenommen werden. punch for preliminary separation of undissolved sub should be made prior to UV treatment, a fine filtration.

Die apparative Gestaltung der UV-Reaktor-Kammer folgt den Erfordernissen des er findungsgemäßen Verfahrens. The apparative design of the UV reactor chamber follows the requirements of he inventive method. Es kann ggf. ein axial durchströmbarer Reaktor oder ein Rinnen-Reaktor verwendet werden. It can optionally be used an axially through-flow reactor or a tray reactor. Günstigerweise erfolgt der Abbau in einem kombinierten Reaktor mit ultravioletter Bestrahlung < 200 nm und < 190 nm. Conveniently, the reduction takes place in a combined reactor with ultraviolet radiation <200 nm and <190 nm.

Claims (4)

  1. 1. Verfahren zur Aufbereitung von Abwasser aus Fahrzeugwaschanlagen durch Verwendung von ultraviolettem Licht, Aktivatoren und Oxidation insbe sondere zum Abbau von Tensiden, Kohlenwasserstoffen, Waschmitteln usw., so daß das gereinigte Wasser wieder für den Waschvorgang eingesetzt werden kann. 1. A process for treating waste water from car wash facilities by use of ultraviolet light, oxidation activators and in particular to reduce sondere surfactants, hydrocarbons, detergents, etc., so that the purified water can be reused for the washing process.
  2. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ultraviolettes Licht der Wellenlängen < 200 nm und < 190 nm verwendet wird. 2. The method according to claim 1, characterized in that ultraviolet light of wavelengths <200 nm and <190 nm is used.
  3. 3. Verfahren nach Anspruch 1 bis 2, dadurch gekennzeichnet, daß, in das mit ultraviolettem Licht < 200 nm bestrahlte Wasser, Luft, die mit ultraviolettem Licht < 190 nm bestrahlt wurde, eingeblasen wird, insbesondere vor, gerade bei oder nach der UV-Behandlung des Wassers. 3. The method according to claim 1 to 2, characterized in that, is with ultraviolet light <200 nm irradiated water, air, which has been irradiated with ultraviolet light <190 nm blown into the, in particular, just at or after UV treatment of the water.
  4. 4. Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß als Akti vatoren Oxidantien wie Wasserstoffperoxid, Ozon, Peroxidsulfat, Salze, mehr wertige Metalle - insbesondere Eisenionen - eingesetzt werden. 4. The method according to claim 1 to 3, characterized in that as Akti vatoren oxidants such as hydrogen peroxide, ozone, Peroxidsulfat, salts, more valent metals - are used - in particular iron ions.
DE1995112540 1995-04-06 1995-04-06 Waste water from vehicle wash plants to be reused in washing process Withdrawn DE19512540A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1995112540 DE19512540A1 (en) 1995-04-06 1995-04-06 Waste water from vehicle wash plants to be reused in washing process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1995112540 DE19512540A1 (en) 1995-04-06 1995-04-06 Waste water from vehicle wash plants to be reused in washing process

Publications (1)

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DE19512540A1 true true DE19512540A1 (en) 1996-10-10

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DE1995112540 Withdrawn DE19512540A1 (en) 1995-04-06 1995-04-06 Waste water from vehicle wash plants to be reused in washing process

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156652A (en) * 1977-07-28 1979-05-29 Reiner Wiest Apparatus for sterilizing fluids with UV radiation and ozone
US4230571A (en) * 1979-01-22 1980-10-28 Dadd Robert C Ozone/ultraviolet water purification
US4990316A (en) * 1988-12-23 1991-02-05 Lyonnaise Des Eaux Apparatus for the disolution of ozone in a fluid
DE4138421A1 (en) * 1991-11-22 1993-05-27 Degussa A method for decomposing pollutants in water using hydrogen peroxide under UV irradiation
EP0567951A1 (en) * 1992-04-25 1993-11-03 Dornier Gmbh Process for treating and recycling waste waters from car repair shops
DE4307046A1 (en) * 1992-07-03 1994-01-05 Harald Kloess Car wash water cleaner - has container and sepn. systems to recirculate water without sludge basins and purificn. plant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156652A (en) * 1977-07-28 1979-05-29 Reiner Wiest Apparatus for sterilizing fluids with UV radiation and ozone
US4230571A (en) * 1979-01-22 1980-10-28 Dadd Robert C Ozone/ultraviolet water purification
US4990316A (en) * 1988-12-23 1991-02-05 Lyonnaise Des Eaux Apparatus for the disolution of ozone in a fluid
DE4138421A1 (en) * 1991-11-22 1993-05-27 Degussa A method for decomposing pollutants in water using hydrogen peroxide under UV irradiation
EP0567951A1 (en) * 1992-04-25 1993-11-03 Dornier Gmbh Process for treating and recycling waste waters from car repair shops
DE4307046A1 (en) * 1992-07-03 1994-01-05 Harald Kloess Car wash water cleaner - has container and sepn. systems to recirculate water without sludge basins and purificn. plant

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
HOFMANN,Rainer: Abwasser katalytisch reinigen. In: Umwelt Bd.22, 1992, Nr.1/2, Jan./Feb., S.26-28 *
JP 63-310699 A.,In: Patents Abstracts of Japan, C-584,April 12,1989,Vol.13,No.151 *
OLLIS,David F., et.al.: Destruction... In: Environ. Sci. Technol., Vol.25, No.9, 1991, S.1522-1529 *

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