DE10040566A1 - Disinfecting water by ultra violet light and ozone converted from oxygen by ultra violet light in twin chamber concentric tubular assembly - Google Patents

Abstract

In a process to disinfect drinking water by exposure to ultra violet (UV) radiation within an aquatic system (1), the water is exposed to UV within a given range of wavelength (S1-S2) emitted from an artificial source. The water flows around the UV source in the vicinity of which oxygen is simultaneously released and converted to ozone by the UV radiation. An Independent claim is also included for an upright disinfecting assembly in which a supply of oxygen is released with water into an annular compartment (3) surrounding the UV source (2). The oxygenated water (W) passes into a second radial outer compartment (4) where it subjected to UV treatment and then brought into contact with the resulting ozone. Water may be repeatedly treated by the same process before release for use. The water that has been treated with a combination of UV radiation and ozone is fed to a user-point. A suitable assembly incorporates an upright UV-ozone reactor (10) with a low-pressure mercury straight tube UV-emitter (2). The emitter is located within a cylindrical container (6) with an air/oxygen supply (8) and an ozone outlet (9) to the second cylinder. The first cylinder is surrounded by a second concentric container (7) with a water inlet (11) and outlet (12).

Description

The invention relates to a method and an apparatus for Preparation of an aquatic system, especially a ver drive and a device for disinfecting drinking water, the medium being exposed to UV radiation.

According to the state of the art, water is treated from two different points of view:

• 1. The extraction of hygienically perfect water, the means free of pathogens and pollutants.
• 2. Elimination of technically disruptive components.

Few waters naturally have a composition that meets the requirements for drinking water in every respect. The procedures are used to remove interfering ingredients (inorganic compounds, anthropogenic organic compounds)

• a) aeration
• b) Filtration
• c) activated carbon treatment
• d) ion exchanger

applied.

Disinfectants are used to eliminate pathogens Process used. The aim of disinfection is to: Reduce the number of pathogens so that an infection tion can no longer start from the disinfected goods or a transmission is no longer possible.

For disinfection

• 1. Physical procedures
  • a) Thermal processes (heating in water, treatment in hot steam)
  • b) radiation treatment (UV, X-ray)
• 2. Chemical processes (gases: ethylene oxide, ozone; alcohols, Aldehydes, phenols, ammonium compounds, peroxides, heavy metals, halogen compounds)

used.

If ozone is used as gas according to point 2 , this is generated primarily by silent electrical discharge. Occasionally, ozone is also extracted from water by electrolysis.

The invention is based on a prior art according to the aforementioned point 1 b.

It is an object of the invention, a method and a device treatment for the preparation of an aquatic system at the beginning to provide the type with which an aquati Very effective medium with very simple means processed, especially disinfected.

This task is the subject of the independent Ab sayings solved. Advantageous configurations result from the respective subclaims.

According to the invention, the medium flows through the UV radiation area of an artificial UV lamp, the medium flowing around the artificial UV lamp. In the UV radiation area of the UV lamp, ozone is simultaneously generated by means of a forced supply of O ₂ , and the UV-treated medium is also specifically exposed to the generated ozone, ie the medium is additionally treated with ozone. Under forced O ₂ supply is understood not only the supply of pure oxygen, but the supply of a gas mixture in general, which contains an oxygen component, for. B. atmospheric air. The aquatic medium to be treated can be water, especially drinking water. However, it can also be any other aqueous solution or mixture which, for. B. is to be disinfected particularly intensively for medical purposes.

In particular, the forced O ₂ flow in a first annular, radially inner compartment around a central UV radiator generates ozone, and the medium is UV-treated by a forced flow of the medium in a second, annular, radially outer compartment, the medium after the UV treatment by supplying the generated ozone is also treated with ozone.

The both UV-treated and ozone-treated medium will especially a consumer or a user tet.

The medium can be used or used in several before UV / ozone treatment zones are treated.

After the ozone treatment of the medium, the remaining can Ozone in an ozone retention zone can still be broken down.

The medium is particularly in one or more UV / ozone treatment zones and in one or more ozone Dwell zones treated in a closed circuit.

The residual ozone not depleted in the ozone dwell zone becomes expediently suctioned off and returned to the circuit leads.  

Then the medium to be processed is preferably in the Dwell zone is added to the circuit, and it becomes the Dwell zone adapted to atmospheric pressure.

The ozone is preferably from the first annular com Partiment suctioned off and returned to the medium.

In particular, the medium is directed radially outwards th UV radiation area of a central rectilinear UV Spotlight preferably in the form of a low pressure mercury exposed to radiation.

The UV lamp is preferably both one on the Medium-acting first UV radiation with the main resonance line of 253.7 nanometers as well as one on the medium acting second radiation with the spectral line of 184.9 Nanometer generated.

A quartz glass wall surrounding the UV lamp can expediently for permeability of the first and second UV Radiation can be doped to contain a lot of ozone to be able to generate. In contrast, known mercury low pressure radiator, e.g. B. sunlamps, designed so that the aforementioned second radiation is suppressed in order to little disruptive, often harmful ozone to pro duce.

The heat generated during ozone generation is preferred dissipated by a heat dissipation or cooling system, wherein the heat dissipated is used in a heating system can be.

A redox potential is preferably used as a disinfectant Indicator used, in particular the medium or what this carbon dioxide gas is metered.  

A special device for performing the aforementioned method according to the invention is characterized in that a UV / ozone reactor is provided with a UV lamp in the form of a linear mercury low pressure lamp which is in a cylindrical first container with an air or O ₂ supply line and an ozone mixture or ozone discharge line is embedded and surrounded by a radially outer concentric second cylindrical container with a water supply line and a water discharge line into which the ozone discharge line opens.

The low-pressure mercury lamp and the first and second containers are in particular arranged vertically, where in the first and the second container are covered watertight by an upper cover, through which the low-pressure mercury lamp with a top current connection and the O ₂ supply line are decentralized a short pipe section in the area of the underside of the lid in the interior of the container and the ozone discharge line with a long tube section in the interior of the container extends into the region of the lower end of the first container, the water supply line in the region of the upper cover merging with the second container in the shell, while the water discharge line is connected on the jacket side on the lower side removed from the cover.

The jacket-side junction of the water supply line and the Jacket-side connection of the water drainage line is available conveniently on opposite sides of the second container.

In particular, at least two UV / ozone reactors are provided are, the water supply and drain lines in a row connected in series or in series and the O2 supply and ozone discharge lines side by side or in parallel are closed.  

The aforementioned ozone retention zone can be replaced by at least one Ozone retention containers can be shown, at least a UV / ozone reactor with at least one ozone residence time containers can be provided in a water cycle.

The ozone retention tank then has the supply for that Medium to be processed, especially water, while at least one withdrawal point for the processed medium, ins special treated drinking or process water in which (Water) discharge line of the UV / ozone reactor before the inlet tion point of the ozone discharge line is provided.

Furthermore, the ozone retention tank can have a first upper side connection for a residual ozone discharge line back to Have circulation, with in the residual ozone discharge line Suction injector can be arranged.

The ozone retention tank can also have a second surface term connection for a pressure compensation connection with the At have atmosphere, being in the pressure compensation connection a carbon filter can be arranged.

At least one water pump can be arranged in the water circuit be, which is preferably in the return between the ozone Ver because of the time container and the UV / ozone reactor.

The invention therefore in particular reduces ozone supported UV disinfection for the disinfection of aquatic systems stemen, especially created from drinking water, one on the one hand UV rays and on the other hand targeted ozone in a com bination process generated and in an aquatic medium be exploited. In particular, UV disinfection by low-pressure mercury lamps next to the main reso line 253.7 nm generated spectral line of 184.9 nm to Ozone production used and the gas generated in a Kom bination process to strengthen the disinfectant we kung UV light used.  

1. UV radiation a. The production

Mercury is used to generate short-wave UV light low-pressure radiator used, the short-wave radiation in Form a line spectrum with the main resonance lines 253.7 nm (Nanometers) and 184.9 nm. The relative spectral Radiation at 253.7 nm is approx. 60-70%, that at 184.9 nm about 20%.

b. The disinfectant effect

The disinfectant effect of UV light lies in the reak tion with nucleic acids. The killing of microorganisms rests on the agreement of the radiation maximum at 253.7 nm with the spectral function of germ killing (Thy mindimerisierung). UV light is an effective chemical free and environmentally friendly process for disinfection.

2. Ozone a. The production

According to the prior art mentioned at the outset Generation of ozone the ozone generation by silent electri discharge most widely established. In addition, ozone can be obtained by electrolysis of water.

In contrast, the invention specifically uses UV radiation of an oxygen-containing gas for the generation of ozone Creating a forced flow out.  

b. The disinfectant effect - chemical effect

Ozone is the strongest oxidizing agent that can be used technically. In its manufacture from air or oxygen by means of Low-pressure mercury lamps are no chemicals necessary manoeuvrable.

Its disinfectant effect is based on chemical ver Change (oxidation and ozonation) of essential molecules laren structures of microorganisms and is about fifty times stronger than the usual disinfection with chlorine or chlorver bonds.

Because of its great willingness to react with organic as well as inorganic compounds can be dissolved in water Ingredients are flocculated and made filterable. Oxidation and ozonation make them resistant in biolo genetically degradable substances. The formation of kanzero against substances such as those used with chlorine and its Compounds observed (halomethane) is not be known. Compared to other chemical disinfectants ozone leaves no residue after use.

3. Use and advantages of the combined disinfection process rens with UV and ozone a. Utilization of the energy expenditure of a special mercury Bernese eder pressure jet

In the combined disinfection process according to the invention a special ozone-forming UV lamp with a doped Quartz glass wall used, in which 30-40% of the power consumption  abge in the form of UV light with a wavelength of 253.7 nm will give and 10% of the power consumption to generate Ozone serve as an additive for disinfection in addition to the UV Light is used. The ozone-forming component with the Wavelength of 184.9 nm is not suppressed or absorbed beers, as is the case with the prior art.

b. Ozone as a means of preventing generation and degradation of biofilms

Biofilms are slimy substances made by microorganisms as a form of resistance mechanism to be formed itself before the attack of disinfectants protect. Adhere to these protective structures at the interfaces of aquatic systems (pipelines Etc.). Approximately 99% of all in an aquatic system Bacteria reside in such biofilms. UV light can, as studies have shown, only for destruction of the microorganisms present in the water vagabonding nen, d. H. only 1% can be killed by the UV mechanism become. Based on this knowledge, the invention an additional highly effective when using UV light Disinfection measure created. Ozone is captured due to its high oxidation power also biofilms and the reliable microorganisms, and kills the microorganism nisms.

c. Residual germ removal and residual amount removal by ozone

According to studies carried out, ozone acts in contrast to other disinfectants even if they are too organisms in the smallest quantities or para occur naturally in other microorganisms (Legionella  in Amoeben, Cryptosporidia, Lamblia). That through ozone The "residual germ removal" effect is based on the very high affinity of ozone to compounds in living supramolecular Structures. Its high reaction potential means that also reactions with the smallest amounts of organic and inorganic substances (residual quantity removal). The remaining quantities In contrast to other chemi, removal by ozone takes place means always residue-free, what in the manufacture of ultrapure water is particularly important.

d. Breakdown of carcinogenic substances - ozone compared to chlorine compounds

Ozone reacts with anthropogenic substances through ozonation or oxidation Water ingredients to more hydrophilic and therefore better bio logically degradable substances (e.g. use for detoxification processes). Chlorine and its compounds react against it with anthropogenic substances to chlorinated hydrocarbons, that largely elude biodegradation. Chlorinated hydrocarbons are carcinogens caused by The effects of ozone are largely rendered harmless the.

Especially through serial and parallel use of UV / ozone reactors can potentiate the disinfectant Effect can be achieved, preferably by flowing through of "reactors connected in series" (serial applications formation).

A further potentiation of the disinfection measure can can be achieved by multiplying the ozone concentration. For this purpose, the reactors arranged in series are parallel to each other  flowed through with gas (parallel arrangements), and that Gas is led into the water to be disinfected.

The ozone yield multiplies with the number of reactors ren. Furthermore, the reactor can be used for residual zone removal become. The rest of a water treated with ozone becomes remaining ozone is removed before it is turned into process water is set. UV of wavelength 253.7 nm destroys ozone in aqueous medium. By circulating the water it becomes UV and ozone treated water again through the reactor tet to make it another UV radiation now for ozone suspension. The removal of ozone-free water takes place immediately after exposure to UV light before ozone-in jection.

The invention is described below with reference to exemplary embodiments len with reference to the accompanying drawings tert; show it:

Fig. 1 shows an apparatus for preparing a medium Aquati rule in the form of an UV / ozone reactor for intensive disinfection of drinking water in a schematic vertical section,

Fig. 2 more UV / ozone reactors according to Fig. 1 in a common serial and parallel application in a schematic basic illustration,

Fig. 3 shows a UV / ozone reactor according to FIG. 1 in a closed water circuit together with an ozone retention tank for a residual ozone removal in a schematic diagram, and

Fig. 4 is a schematic representation of the principle of action of the invention.

According to the drawing, a device for the treatment of an aquatic medium W of an aquatic system 1 for the disinfection of drinking water comprises a UV / ozone reactor 10 , the medium drinking water being exposed to UV radiation.

The drinking water W flows through the W radiation area S ₁ , S _{2 of} an artificial UV lamp 2 in the form of a low-pressure mercury lamp, the medium drinking water flowing around the artificial UV lamp in a targeted forced flow.

In the UV radiation range of the UV lamp, ozone is simultaneously generated by means of a targeted O ₂ supply. The medium of drinking water is also exposed to the ozone generated and treated with ozone.

The medium is exposed to a radially outward UV radiation region of a central rectilinear UV lamp 2 in the form of a low-pressure mercury lamp.

The UV radiator 2 emits both a first UV radiation S ₁ acting on the medium W with the main resonance line of 253.7 nanometers (2537 angstroms) and a second radiation S ₂ acting on the medium W with the spectral line of 184 , 9 nanometers (1849 angstroms).

In particular, the forced O ₂ flow in a first annular, radially inner compartment 3 around the central UV radiator 2 generates ozone, and the forced UV flow of the drinking water W in a second, annular, radially outer compartment 4 causes the medium UV - Treated, whereby the medium W is also treated with ozone after the UV treatment by supplying the generated ozone.

The medium UV treated and ozone treated is sent to a consumer.

The heat generated during ozone generation can be caused by a Dissipated heat dissipation or cooling system and if necessary continue to be used in a heating system.

According to Fig. 1, in particular a UV-ozone reactor 10, a UV lamp 2 in the form of a rectilinear mercury low pressure lamp on, the Medley ter in a cylindrical first Behäl 6 with air or O ₂ -Zufuhrleitung 8 and an ozone or ozone discharge line 9 is embedded and surrounded by a radially outer concentric second cylindrical container 7 with a water supply line 11 and a water discharge line 12 , into which the ozone discharge line 9 opens.

The low-pressure mercury radiator and the first and second containers 6 , 7 are arranged vertically, whereby he and the second container are covered by an upper cover 13 with a clamping ring 24 , through which the low-pressure mercury radiator with a power connection on top and decentrally located O ₂ supply line 8 with a short pipe section 25 in the area of the lid underside in the interior of the container and the ozone discharge line 9 with a long pipe section 23 in the form of an immersion tube in the container interior extends into the region of the lower end of the first container 6 , the water supply line 11 opens into the second container 7 in the area of the upper cover 13 , while the water drainage line 12 is connected on the casing side on the lower side removed from the cover.

The jacket-side opening of the water supply line 11 and the jacket-side connection of the water discharge line 12 lie on opposite sides of the second container 7 .

The first container 6 has a first annular Kompar time 3 for through-flowing O ₂ gas with a UV-ray-permeable quartz glass wall 14 , a lower base 15 of the low-pressure mercury lamp being embedded and centered in a tapered region of the first container 6 . The quartz glass wall 5 surrounding the UV emitter 2 is specially doped for permeability of the first and second UV radiation S ₁ , S ₂ .

The second container 7 has a second annular Kom partiment 4 for water to flow through with a wear-resistant Duran glass wall, the lower bottom 16 of the second container 7 being spaced from the lower bottom of the first container 6 , and thus water W by the UV / ozone Reactor can flow not only in the ring section, but also on the bottom.

The ozone discharge line 9 opens into a suction injector A.

Referring to FIG. 2, the drinking water W can before consumption or use in a plurality of UV / ozone treatment zones I, II, III is be be. In the exemplary embodiment, three UV / ozone reactors 10 are specifically provided, the water supply and discharge lines 11, 12 are connected in series or in series and their O ₂ supply and ozone discharge lines 8 , 9 side by side or in parallel are connected.

Referring to FIG. 3, the remaining ozone-ozone residence zone IV can be degraded by ozone treatment of the drinking water in a. The drinking water W is treated in a UV / ozone treatment zone I and in an ozone retention zone IV in a closed circuit K. The residual ozone not depleted in the ozone dwell zone IV is sucked off by an exhaust gas injector A and returned to the circuit K. The medium W to be prepared is fed to the circuit K in the ozone retention zone IV. The ozone dwell zone IV is adapted to the atmospheric pressure p.

In particular, according to FIG. 3, a single VV / ozone reactor 10 with a single ozone retention tank B is provided in a common water circuit K. The ozone residence time container B has a water supply for water to be treated W, while a removal point 17 for treated drinking or process water in the water discharge line 9 of the UV / ozone reactor 10 is provided in front of the introduction point 18 of the ozone discharge line 9 . The ozone retention tank B has a first top connection 19 for a residual ozone discharge line 20 back to the circuit K, wherein the already mentioned suction injector A is arranged in the resto zone discharge line 20 . The ozone retention tank B also has a second top connection 21 for a pressure compensation connection 22 with the atmosphere p, a carbon filter F being arranged in the pressure compensation connection 22 . In the water cycle K, a water pump P is finally arranged, which is between the ozone retention time B and the UV / ozone reactor 10 .

In Fig. 4, the scheme of the principle of the invention is Darge, from which the beam path S ₁ and S ₂ through the UV / ozone reactor 10 with the associated reactions E ₁ , E ₂ and E _{3 of} the flow media water and oxygen O ₂ and O ₃ are visible.

In detail:
UV lamp 2 (low-pressure mercury lamp)
UV radiation S ₁ of wavelength 253.7 nm
UV radiation S ₂ of wavelength 184.9 nm
Quartz glass wall 5 of the UV lamp 2
inner compartment 3 (air / oxygen)
Wall 14 of the quartz glass cylinder
outer compartment 4 (water)
Reaction E ₁ : O ₂ + 184.9 nm → O ₃ + heat + light
Reaction E ₂ : H ₂ O + 184.9 nm → H ₂ O ₂
Reaction E ₃ : Living microorganisms + 253.7 nm → → dead microorganisms

In summary, essentially the UV Disinfection by low-pressure mercury lamps next to the Main resonance line 253.7 nm generated spectral line of 184.9 nm used for ozone production and the gas produced in egg Combination process to strengthen the disinfect the effect of UV light used.

The beam generated by a low-pressure mercury lamp with the main resonance lines 184.9 nm and 253.7 nm initially by a flowing oxygen-containing gas or passed through pure oxygen. The shorter-wave part of radiation at a spectral line of 184.9 nm here in a photochemical process ozone. A considerable amount The share of the energy used for this is in the form free from heat that is dissipated to the yield of ozone not to diminish. The ozone gas mixture turns into disin medium (water) introduced. By a special doped quartz glass, which is permeable to rays of Wavelength is 253.7 nm and 184.9 nm, the radiation hits on the flowing liquid medium to be disinfected (What ser). The shorter-wave component produces here in one Disinfection unusable extent hydrogen peroxide, while the longer-wave component is the one present in the water kills microorganisms.  

The reactor shown in FIG. 1 and already described in principle consists of Duran glass, is a cylinder with a diameter of 10 cm and a height of 40 cm. A quartz glass cylinder, which is built into the cover of the cylinder in a pressure-tight manner and contains the low-pressure mercury lamp mounted centrally, divides the reactor space into two separate compartments that are sealed against the environment. The oxygen-containing gas or oxygen flows through the inner compartment 3 . The gas is introduced at the top of compartment 3 . The ozone-gas mixture is discharged via an immersion tube. The air or gas flow is generated by the suction injector A installed in the water flow. The outer compartment 4 is flowed through by the liquid to be irradiated, which is here exposed to the irradiation for a length of 40 cm. The liquid is used to transport the reaction heat generated in the inner compartment. The inlet and outlet openings of the reactor are made in standard sizes.

Finally, it should be mentioned that an improved variant of the invention ante is achieved by introducing carbon dioxide. in this connection the redox potential is used as a disinfectant or sterilizer tion indicator used.

As extensive tests have shown, survival is by Pathogens with a redox potential of more than 700 mV (Mercury / mercury chloride electrode, pH = 7.2) not more is possible.

Oxidation reactions with ozone run in the weakly alkaline Milieu more effectively than in the acidic range. this fact is based on the catalytic decomposition of ozone by Hy droxylionen. OH radicals are formed which are very reactive  are and with almost all water ingredients very react fast. This is how OH radicals also react with hydrogen carbonate ions. In hard water (the carbonate The hardness of a water is determined by the amount of hydrogen carbonate ions compared to other oxidizable water constituents true) with a relative excess of hydrogen carbonate ions compared to other oxidizable water constituents OH radicals are intercepted. Since the OH radicals under the Catalytic effect of hydroxyl ions also on ozone decay contribute, is the ozone molecule in hard water more permanent, d. H. durable.

To replace the water hardness consumed by ozone reactions and to protect the ozone molecule and keep the Hydrogen ion concentration (pH value) in an aquatic System without affecting the conductivity of the system (a Increasing the conductivity has a negative impact the redox voltage generated by ozone) becomes more advantageous Further development of the invention carbon dioxide gas zudo Siert. This procedure can be used in an aquati system with significantly lower amounts of ozone are sufficient de Redox potentials can be achieved which are above 700 mV.

Claims (30)

1. A process for the preparation of an aquatic medium (W) of an aquatic system ( 1 ), in particular a method for disinfecting drinking water, the medium being exposed to UV radiation, characterized in that the medium (W) covers the UV radiation region (p ₁ , S ₂ ) flows through an artificial UV lamp ( 2 ), the medium flowing around the artificial UV lamp, and simultaneously generates ozone in the UV radiation region of the UV lamp by means of an O ₂ supply, and the medium (W) also to which he produces ozone is exposed or is treated with ozone. 2. The method according to claim 1, characterized in that by an O ₂ flow in a first annular radially inner compartment ( 3 ) around the central UV lamp ( 2 ) generates ozone and by a flow of the medium (W) in one second annular radially outer compartment ( 4 ) the medium is UV-treated, the medium (W) being treated with ozone after the UV treatment by supplying the generated ozone. 3. The method according to claim 1 or 2, characterized, that both UV-treated and ozone-treated Me dium (W) is supplied to a consumer. 4. The method according to any one of claims 1 to 3, characterized, that the medium (W) in before consumption or use treated several UV / ozone treatment zones (I, II, III) becomes.   5. The method according to any one of claims 1 to 4, characterized, that after the ozone treatment of the medium (W) the lead ozone in an ozone retention zone (IV) is broken down. 6. The method according to claim 5, characterized, that the medium (W) in the UV / ozone treatment zone (s) (I, II, III) and ozone dwell zone (s) (IV) in a closed Circuit (K) is treated. 7. The method according to claim 6, characterized, that that in the ozone dwell zone (IV) is not degraded Aspirated residual ozone and returned to the circuit (K) becomes. 8. The method according to claim 6 or 7, characterized, that the medium to be treated (W) in the ozone dwell zone (IV) is supplied to the circuit (K). 9. The method according to any one of claims 5 to 8, characterized, that the ozone dwell zone (IV) is the atmospheric pressure (p) is adjusted. 10. The method according to any one of claims 2 to 9, characterized in that the ozone is sucked out of the first annular compartment ( 3 ) and fed back to the medium. 11. The method according to any one of claims 1 to 10, characterized in that the medium is exposed to the radially outward UV radiation region of a central rectilinear UV radiator ( 2 ) preferably in the form of a low-pressure mercury lamp. 12. The method according to any one of claims 1 to 11, characterized in that by the UV lamp ( 2 ) both acting on the medium (W) acting first UV radiation (S ₁ ) with the main resonance line of 253, 7 nanometers as also a second radiation (S ₂ ) acting on the medium (W) with the spectral line of 184.9 nanometers is generated. 13. The method according to claim 12, characterized in that a UV lamp ( 2 ) surrounding quartz glass wall ( 5 ) for a transmittance of the first and second UV radiation (S ₁ , S ₂ ) is doped. 14. The method according to any one of claims 1 to 13, characterized, that the heat generated during ozone generation by a Heat dissipation or cooling system is dissipated. 15. The method according to claim 14, characterized, that the heat dissipated in a heating system is applied. 16. The method according to any one of claims 1 to 15, characterized, that a redox potential as a disinfection indicator ver is applied. 17. The method according to claim 16, characterized, that the medium (W) carbon dioxide gas is metered. 18. Device for performing the method according to one of claims 1 to 17, characterized in that a UV-ozone reactor ( 10 ) with a UV lamp ( 2 ) is provided in the form of a rectilinear low-pressure mercury lamp, which is in a cylindrical first container ter ( 6 ) with an air or O ₂ supply line ( 8 ) and egg ner ozone mixture or ozone discharge line ( 9 ) and embedded by a radially outer concentric second cylindrical container ( 7 ) with a water supply line ( 11 ) and one Water discharge line ( 12 ) is surrounded, into which the ozone discharge line ( 9 ) opens. 19. The apparatus according to claim 18, characterized in that the low-pressure mercury lamp and the first and the second container ( 6 , 7 ) are arranged vertically, the first and the second container being covered by an upper cover ( 13 ) in a watertight manner, by wel chen centrally the low-pressure mercury lamp with top-side power connection and decentrally the O ₂ supply line ( 8 ) with a short tube section ( 25 ) in the area of the lid underside inside the container and the ozone discharge line ( 9 ) with long tube section ( 23 ) inside the container into the area The lower end of the first container ( 6 ) extends, the water supply line ( 11 ) in the area of the upper lid ( 13 ) on the jacket side opens into the second container ( 7 ), while the water discharge line ( 12 ) on the lower side removed from the lid is connected on the jacket side. 20. The apparatus according to claim 18 or 19, characterized in that the jacket-side mouth of the water supply line ( 11 ) and the jacket-side connection of the water drainage device ( 12 ) are on opposite sides of the second container ( 7 ). 21. Device according to one of claims 18 to 20, characterized in that the low-pressure mercury lamp has a doped quartz glass wall ( 5 ) which has both a first UV radiation (S ₁ ) with the main resonance line of 184.9 nanometers and a second radiation (S ₂ ) with the spectral line of 184.9 nanometers. 22. Device according to one of claims 18 to 21, characterized in that the first container ( 6 ) forms a first annular Kom partiment ( 3 ) for O ₂ gas to flow through and has a UV-radiation-permeable quartz glass wall ( 14 ), wherein a lower base ( 15 ) of the low-pressure mercury lamp is embedded or centered in a tapered area of the first container ( 6 ). 23. Device according to one of claims 18 to 22, characterized in that the second container ( 7 ) forms a second annular Kom partiment ( 4 ) for water to flow through (W) and has a wear-resistant Duran glass wall, the lower bottom ( 16 ) of the second container ( 7 ) is spaced from the bottom of the first container ( 6 ). 24. Device according to one of claims 18 to 23, characterized in that the ozone discharge line ( 9 ) has a suction injector (A). 25. Device according to one of claims 18 to 24, characterized in that at least two UV / ozone reactors ( 10 ) are provided, the water supply and discharge lines ( 11 , 12 ) being connected in series or in series and the O2 supply and ozone discharge lines ( 8 , 9 ) are connected side by side or in parallel. 26. Device according to one of claims 18 to 25, characterized in that at least one UV / ozone reactor ( 10 ) with at least one ozone retention tank (B) are provided in a water circuit (K). 27. The apparatus according to claim 26, characterized in that the ozone retention tank (B) has a water supply for water to be treated (W), while at least one removal point ( 17 ) for treated drinking or process water in the water discharge line ( 9 ) of the UV / Ozone reactor ( 10 ) is provided in front of the introduction point ( 18 ) of the ozone discharge line ( 9 ). 28. Device according to one of claims 18 to 27, characterized in that the ozone residence time container (B) has a first upper-side connection ( 19 ) for a residual ozone discharge line ( 20 ) back to the circuit (K), in the residual ozone -Exhaust line ( 20 ) a suction injector (A) is arranged. 29. Device according to one of claims 18 to 28, characterized in that the ozone residence time container (B) has a second upper-side connection ( 21 ) for a pressure compensation connection ( 22 ) with the atmosphere, wherein in the pressure compensation connection ( 22 ) Carbon filter (F) is arranged. 30. Device according to one of claims 26 to 29, characterized in that in the water circuit (K) at least one water pump (P) is arranged, which is preferably between the ozone retention tank (B) and the UV / ozone reactor ( 10 ) ,