EP0597928A1 - Procede d'epuration d'eau potable brute contaminee par des substances organiques - Google Patents

Procede d'epuration d'eau potable brute contaminee par des substances organiques

Info

Publication number
EP0597928A1
EP0597928A1 EP92916380A EP92916380A EP0597928A1 EP 0597928 A1 EP0597928 A1 EP 0597928A1 EP 92916380 A EP92916380 A EP 92916380A EP 92916380 A EP92916380 A EP 92916380A EP 0597928 A1 EP0597928 A1 EP 0597928A1
Authority
EP
European Patent Office
Prior art keywords
drinking water
light
wavelength
lamp
lamps
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Withdrawn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
EP92916380A
Other languages
German (de)
English (en)
Inventor
Wilfried Werz
Karl F. Massholder
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.)
Ultra Systems GmbH UV Oxidation
Original Assignee
Ultra Systems GmbH UV Oxidation
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
Priority claimed from DE4124843A external-priority patent/DE4124843A1/de
Priority claimed from DE19924212604 external-priority patent/DE4212604A1/de
Application filed by Ultra Systems GmbH UV Oxidation filed Critical Ultra Systems GmbH UV Oxidation
Publication of EP0597928A1 publication Critical patent/EP0597928A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C02F1/325—Irradiation devices or lamp constructions

Definitions

  • the present invention relates to a method of the type designated according to the preamble of claim 1 and a device according to the preamble of claim 8.
  • Atrazine has become a major problem. Although it is possible to reduce the atrazine content by means of suitable treatment measures, this is predominantly to be carried out by means of filtration and adsorption with the correspondingly high outlay. These measures are all extremely expensive and involve high investments. In order to meet the guidelines laid down by the European Community with regard to the maximum exposure to, for example, atrazine, the water-producing companies must therefore make enormous efforts.
  • DE-OS 27 35 550 discloses a method for cleaning, in particular for disinfection and disinfection of flowable media in a flow reactor with a predetermined minimum radiation, ie minimum dose, ultraviolet radiation predominantly in the wavelength range from 240-320 nm.
  • the invention also relates to a device for Aus ⁇ Practice of such a method, consisting of one Radiation sources with at least one radiator which emits ultra violet radiation in the wavelength range from 240-320 nm, associated flow reactor with a feed line and a discharge line for the medium to be irradiated and with a monitoring device for the ultraviolet radiation passing through the flow reactor.
  • the technical problem on which the invention is based is therefore to provide a method which makes it possible to avoid the disadvantages mentioned above.
  • the process should be able to be carried out continuously and avoid subsequent oxidative treatment of the drinking water to be treated.
  • the method should be able to be carried out by means of a device adapted to it.
  • wavelengths in the range of in particular> 230 nm enables organic compounds, in particular crop protection agents such as atrazine, to be destroyed without the nitrate being converted to nitrite in the process.
  • crop protection agents such as atrazine
  • the wavelength range can advantageously be selected by means of UV filters. This is preferably done with filters that are made of high-purity quartz in large layer thicknesses such as. B. Heralux (20 mm) from Heraeus (Hanau) or cheaper materials such. B. Infralux M 235 / M 282 are made in sufficient layer thickness from Heraeus (Hanau).
  • UV lamps that meet these requirements are particularly z.
  • auxiliary chemicals for the treatment of the raw drinking water.
  • auxiliary chemicals such as formic acid and its salts, acetic acid, ethanol, citric acid, tartaric acid, glucose and reducing sugars, other organic, reducing hydroxy compounds as well as ammonia, urea and amine derivative, such as amidosulfonic acid, into consideration, since these support the destruction of nitrite.
  • UV light is used, which also has higher proportions of wavelengths less than 230 nm.
  • a device suitable for carrying out the method according to the invention is proposed in P 40 25 078.4.
  • the device described therein has a flow-through reactor, at least one UV lamp and supply and discharge lines and is characterized in that a surface which strongly reflects UV light is arranged in the reactor and a turbulent flow can be generated or stabilized. At flow rates which are below the critical Reynolds number, this can be ensured by means of devices which are arranged on or in front of the UV-reflecting surface.
  • the devices can advantageously be arranged in the liquid flow both inside the reactor and before the medium to be treated enters the reactor.
  • Another variant of the generation of the turbulent flow is based on a tangential inflow of the liquid flow into the reactor.
  • the UV lamps to be used here can in particular be designed as UV immersion lamps.
  • the figure shows a particularly preferred embodiment.
  • the reactor 1 has feed and discharge lines.
  • the UV lamp (2) is designed here as a diving lamp.
  • the outer wall of the immersion tube (3) consists of a glass which acts as a UV filter for wavelengths ⁇ 230 nm.
  • Infralux M 235 from Heraeus is used as the material for the wall of the immersion tube (3) in question.
  • the supply and discharge lines (4, 5) are provided for the inlet and outlet of nitrogen. It has been shown that the use of an inert gas between the UV lamp (2) and the outer wall of the dip tube (3) prevents the formation of undesirable gaseous by-products.
  • the device according to the figure has on the inner wall of the reactor, which is preferably made of polished stainless steel, devices in the form of protuberances which lead to turbulent flows within the reactor. At higher flow rates, the devices can be omitted if the critical Reynolds number is exceeded.
  • An advantage of the process according to the invention is that continuous process control for the degradation of organic compounds, in particular crop protection agents such as atrazine, is made possible, without oxidizing substances such as H 2 O, for the re-oxidation of the nitrite formed by photo-chemical reactions to nitrate.

Landscapes

  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physical Water Treatments (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

Un procédé permet d'épurer par exposition à la lumière ultraviolette de l'eau potable brute contaminée par des substances organiques, notamment l'eau potable brute contenant des nitrates et contaminée par des produits phytosanitaires. L'eau potable brute est exposée à: a) une lumière ultraviolette ayant une longueur d'onde supérieure à 230 nm ou à: b) une lumière ultraviolette contenant également des fractions d'une longueur d'onde inférieure à 230 nm associée à des substances détruisant les nitrures. Un dispositif particulièrement approprié pour mettre en oeuvre le procédé comprend, dans le trajet des rayons entre la lampe UV et l'eau potable brute, des dispositifs de filtrage qui laissent passer la lumière ultraviolette d'une longueur d'onde égale ou supérieure à 230 nm. On peut également utiliser des lampes UV qui ne génèrent essentiellement pas de rayonnements UV à longueur d'onde inférieure à 230 nm.
EP92916380A 1991-07-26 1992-07-22 Procede d'epuration d'eau potable brute contaminee par des substances organiques Withdrawn EP0597928A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4124843 1991-07-26
DE4124843A DE4124843A1 (de) 1991-07-26 1991-07-26 Verfahren zur aufbereitung von mit organischen substanzen belastetem rohtrinkwasser
DE19924212604 DE4212604A1 (de) 1992-04-15 1992-04-15 Verfahren zur Aufbereitung von mit organischen Substanzen belastetem Rohtrinkwasser
DE4212604 1992-04-15
PCT/EP1992/001675 WO1993002965A1 (fr) 1991-07-26 1992-07-22 Procede d'epuration d'eau potable brute contaminee par des substances organiques

Publications (1)

Publication Number Publication Date
EP0597928A1 true EP0597928A1 (fr) 1994-05-25

Family

ID=25905858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92916380A Withdrawn EP0597928A1 (fr) 1991-07-26 1992-07-22 Procede d'epuration d'eau potable brute contaminee par des substances organiques

Country Status (2)

Country Link
EP (1) EP0597928A1 (fr)
WO (1) WO1993002965A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6440928B1 (en) 1988-12-06 2002-08-27 Colorado State University Research Foundation Method for treating diabetic neuropathy with NGF
DE4447035A1 (de) * 1994-12-28 1996-07-11 Eva Gotthold Verfahren und Vorrichtung zum Reduzieren des Nitratgehaltes von Wasser
FR2729382B1 (fr) * 1995-01-16 1997-03-28 Omnium Traitement Valorisa Reacteur d'irradiation uv pour le traitement de liquides
US5847129A (en) * 1995-08-18 1998-12-08 Lenzing Aktiengesellschaft Process for the regeneration of an aqueous process liquid of the amine-oxide process
AT402512B (de) * 1995-08-18 1997-06-25 Chemiefaser Lenzing Ag Verfahren zur aufarbeitung einer wässrigen prozessflüssigkeit des aminoxidverfahrens
AT503799B1 (de) * 2006-07-26 2008-01-15 Vtu Engineering Planungs Und B Verfahren zur reduktion von nitrat

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4144152A (en) * 1978-03-27 1979-03-13 Atlantic Research Corporation Dehalogenation of halogenated compounds
IT1216499B (it) * 1988-03-23 1990-03-08 Eniricerche Spa Processo di degradazione fotocatalitica del bentazone.
DE3836850A1 (de) * 1988-10-28 1990-05-03 Guenther O Prof Dr Schenck Verfahren und vorrichtung zur reinigung von waessern von darin enthaltenen oxidierbaren kohlenstoffverbindungen
DE3903549A1 (de) * 1989-02-07 1990-08-09 Int Biotech Lab Uv-licht zum schadstoffabbau, insbesondere von halogenierten kohlenwasserstoffen
DE9017684U1 (de) * 1990-08-08 1991-11-14 Ibl Umwelt- Und Biotechnik Gmbh, 6900 Heidelberg Vorrichtung zur Durchführung photochemischer Reaktionen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9302965A1 *

Also Published As

Publication number Publication date
WO1993002965A1 (fr) 1993-02-18

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19940202

AK Designated contracting states

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Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ULTRA SYSTEMS GMBH UV-OXIDATION

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ULTRA SYSTEMS GMBH UV-OXIDATION

18D Application deemed to be withdrawn

Effective date: 19960201