SE512938C2 - Method to prevent the occurrence and growth of disease-producing microorganisms, in particular Legionella bacteria, in water management systems - Google Patents
Method to prevent the occurrence and growth of disease-producing microorganisms, in particular Legionella bacteria, in water management systemsInfo
- Publication number
- SE512938C2 SE512938C2 SE9803467A SE9803467A SE512938C2 SE 512938 C2 SE512938 C2 SE 512938C2 SE 9803467 A SE9803467 A SE 9803467A SE 9803467 A SE9803467 A SE 9803467A SE 512938 C2 SE512938 C2 SE 512938C2
- Authority
- SE
- Sweden
- Prior art keywords
- water
- hot water
- heated
- incoming
- irradiated
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 241000589248 Legionella Species 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title claims abstract description 7
- 244000005700 microbiome Species 0.000 title description 3
- 201000010099 disease Diseases 0.000 title description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 title description 2
- 238000010079 rubber tapping Methods 0.000 claims abstract description 10
- 244000000010 microbial pathogen Species 0.000 claims abstract 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims description 28
- 239000004155 Chlorine dioxide Substances 0.000 claims description 14
- 235000019398 chlorine dioxide Nutrition 0.000 claims description 14
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 208000007764 Legionnaires' Disease Diseases 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/0073—Arrangements for preventing the occurrence or proliferation of microorganisms in the water
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/322—Lamp arrangement
- C02F2201/3227—Units with two or more lamps
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Abstract
Description
15 20 25 30 512 938 2 riktning. En sådan orientering av UV-lampoma har dock visat sig ge en otillräcklig effekt på avdödningen av Legionella-bakterier. 15 20 25 30 512 938 2 direction. However, such an orientation of the UV lamps has been shown to have an insufficient effect on the killing of Legionella bacteria.
US-A-5,236,600 beskriver tillsats av klor till vatten för att eliminera Legionella- bakterier. Detta är dock otillräckligt eftersom det finns klorresistenta Legionella- Stammâf.US-A-5,236,600 discloses the addition of chlorine to water to eliminate Legionella bacteria. However, this is insufficient as there are chlorine-resistant Legionella strains.
Inget av dessa system erbjuder dock en fullgod säkerhet mot förekomst och tillväxt av Legionella-bakterier i vattenledningssystem, varför det föreligger ett stort behov av ett förbättrat system.However, none of these systems offer adequate security against the presence and growth of Legionella bacteria in water supply systems, so there is a great need for an improved system.
Uppfinningens ändamål och viktigaste kännetecken Ändamålet med föreliggande uppfinning är att erbjuda en metod att förhindra förekomst och tillväxt av sjukdomsalstrande mikroorganismer, i synnerhet Legionella- bakterier, i vattenledningssystem vilken erbjuder en betydligt högre säkerhet än hittills kända metoder. Detta har uppnåtts genom att allt inkommande såväl vann- som kallvatten UV-bestrålas medelst ett flertal UV-rör orienterade väsentligen tvärs vattnets strömningsriktriing, att inkommande varmvatten upphettas till minst 70°C, företrädesvis minst 75 °C, att det upphettade varmvattnet blandas med UV-bestrålat kallvatten till önskad varmvattentemperatur och distribueras till tappställena, och att varmvattnet till tappställena cirkuleras, varvid det åter UV-bestrâlas och upphettas till minst 70 ° C, företrädesvis minst 75 °C.Object and main features of the invention The object of the present invention is to provide a method for preventing the presence and growth of disease-causing microorganisms, in particular Legionella bacteria, in water supply systems which offers a much higher safety than hitherto known methods. This has been achieved by UV-irradiating all incoming both water and cold water by means of a plurality of UV tubes oriented substantially across the flow direction of the water, that incoming hot water is heated to at least 70 ° C, preferably at least 75 ° C, that the heated hot water is mixed with UV irradiated cold water to the desired hot water temperature and distributed to the tapping points, and that the hot water to the tapping points is circulated, whereby it is again UV-irradiated and heated to at least 70 ° C, preferably at least 75 ° C.
Enligt ett föredraget utförande tvättas återkommande hela vattenledningssystemet med klordioxidlösning.According to a preferred embodiment, the entire water supply system is repeatedly washed with chlorine dioxide solution.
Det är även en fördel om en kontinuerlig tillsats av klordioxid sker till inkommande varmvatten, företrädesvis även till inkommande kallvatten.It is also an advantage if a continuous addition of chlorine dioxide takes place to incoming hot water, preferably also to incoming cold water.
Fördelen med klordioxid jämfört med klor är dels att klordioxiden dunstar lätt inom loppet av några minuter, dels ger den en mycket effektivare avdödning av Legionella- ä 10 15 20 25 30 s12n9ssf bakterier.The advantage of chlorine dioxide compared to chlorine is partly that the chlorine dioxide evaporates easily within a few minutes, and partly it gives a much more efficient killing of Legionella- ä 10 15 20 25 30 s12n9ssf bacteria.
Beskrivning av ritning Uppñnningen kommer i det följande att närmare beskrivas med hänvisning till ett på bifogade ritning visat utföringsexempel.Description of the drawing The invention will be described in more detail below with reference to an exemplary embodiment shown in the accompanying drawing.
Figur 1 visar ett principschema över systemet enligt uppfinningen.Figure 1 shows a schematic diagram of the system according to the invention.
Figur 2 visar ett principschema över en anläggning för rengöring av vattenlednings- systemet med en tvättlösning.Figure 2 shows a schematic diagram of a system for cleaning the water supply system with a washing solution.
Beskrivning av uzfiiringsexempel Med hänvisning till Fi g. 1 kommer varmvatten från nätet in vid anslutningen 1 och kallvatten vid anslutningen 2. Såväl inkommande varm- som kallvatten UV-bestrålas medelst UV-aggregat 3a,b, vardera innefattande ett flertal UV-lampor 4 orienterade väsentligen tvärs vattnets strömningsriktriing. En tillsats av klordioxid till det UV- bestrålade varm- respektive kallvattnet sker därefter via anslutningarna 5a,b.Description of use examples With reference to Fig. 1, hot water from the network enters at connection 1 and cold water at connection 2. Both incoming hot and cold water are UV-irradiated by means of UV units 3a, b, each comprising a number of UV lamps 4 oriented. substantially across the flow direction of the water. An addition of chlorine dioxide to the UV-irradiated hot and cold water, respectively, then takes place via the connections 5a, b.
UV-lamporna 4 arbetar lämpligen inom ett brett våglängdsoniråde, 200-315 mn, vilket ger en säker och fullständig avdödning av mikroorganismema. Genom att UV- lampoma 4 är orienterade väsentligen tvärs vattnets strömningsriktning ges hela den genomströmmande vattenmängden en effektiv bestålning med hög intensitet till skillnad från sådana UV-aggregat där UV-lamporna är orienterade i strömnings- riktningen, där strålytan blir sämre.The UV lamps 4 suitably operate within a wide wavelength zone range, 200-315 mn, which provides a safe and complete killing of the microorganisms. Because the UV lamps 4 are oriented substantially transversely to the flow direction of the water, the entire flowing water volume is given an efficient irradiation with high intensity, unlike those UV units where the UV lamps are oriented in the flow direction, where the jet surface becomes worse.
Inkommande varmvatten upphettas i värmebatterier 6a-c till minst 70°C, företrädesvis minst 75 °C. Det upphettade varmvattnet blandas därefter via en blandningsventil 7 med en del av kallvattnet till en temperatur av lämpligen 68-70°C innan det distribueras till tappställen 8 för varmvatten. Resten av kallvattnet distribueras direkt till tappställen 9 för kallvatten. 10 15 20 25 512 938 4 Varmvattnet till tappställena cirkuleras tillbaka till UV-aggregatet 3a, och kan på vägen upphettas i ett vårmebatteri 6d. Efter UV-bestrålningen sker eventuellt en klordioxid- tillsats vid 5a samt en förnyad upphettning till minst 70°C, företrädesvis minst 75 °C i värme-batteriema 6a-c. Det är viktigt att vattentemperaturen inte tillåts understiga ca. 60°C i varmvattnets cirkulationssystem. Lämplig halt klordioxid i systemet är mellan 5 och 20 ppm.Incoming hot water is heated in heating batteries 6a-c to at least 70 ° C, preferably at least 75 ° C. The heated hot water is then mixed via a mixing valve 7 with a part of the cold water to a temperature of suitably 68-70 ° C before it is distributed to hot water tapping points 8. The rest of the cold water is distributed directly to cold water tapping points 9. 10 15 20 25 512 938 4 The hot water for the tapping points is circulated back to the UV unit 3a, and can be heated in a heating coil 6d on the way. After UV irradiation, a chlorine dioxide addition is optionally carried out at 5a and a renewed heating to at least 70 ° C, preferably at least 75 ° C in the heating batteries 6a-c. It is important that the water temperature is not allowed to fall below approx. 60 ° C in the hot water circulation system. The appropriate content of chlorine dioxide in the system is between 5 and 20 ppm.
För att ytterligare eliminera risken för förekomst och tillväxt av Legionella-balrterier i systemet bör detta tvättas, exempelvis 2-3 gånger om året, med höga doser (20-50 ppm) klordioxid. Härvid spolas hela ledningssystemet, såväl varm- som kallvattenled- ningarna, igenom med klordioxidlösningen, vilken företrädesvis även får cirkulera i systemet. Lämplig uppehållstid är mellan 20 och 60 minuter. Tvättlösningen upphettas lämpligen till ca. 70°C för att förhöja effekten.To further eliminate the risk of the presence and growth of Legionella balts in the system, this should be washed, for example 2-3 times a year, with high doses (20-50 ppm) of chlorine dioxide. In this case, the entire pipe system, both the hot and cold water pipes, is flushed through with the chlorine dioxide solution, which is preferably also allowed to circulate in the system. Suitable residence time is between 20 and 60 minutes. The washing solution is suitably heated to approx. 70 ° C to increase the effect.
Ett exempel på en sådan reningsanläggning för återkommande tvättning av vatten- ledningssystemet med klordioxidlösning visas i Fig. 2. I anläggningen ingår en tank 10 för tvättvätska, en elpatron 11 för vännning av denna, en påfyllningsanslutníng 12 samt en inspektionslucka 13. En cirkulationspurnp 14 pumpar runt tvättvätskan i vattenled- ningssystemet 15. Med hjälp av ett antal trevägsventiler l6a-c styrs flödet av tvätt- vätska i systemet så att man kan tvätta ur detta sektionsvis. Tvättvätskan kan även tillföras systemet via tappställena 8 och 9, för att på så sätt spola ur systemet fiån båda håll.An example of such a treatment plant for recurrent washing of the water pipe system with chlorine dioxide solution is shown in Fig. 2. The plant includes a tank 10 for washing liquid, an immersion heater 11 for using it, a filling connection 12 and an inspection hatch 13. A circulation pump 14 pumps around the washing liquid in the water supply system 15. Using a number of three-way valves l6a-c,. the fate of washing liquid in the system is controlled so that it can be washed out in sections. The washing liquid can also be supplied to the system via the tapping points 8 and 9, in order to flush out the system båda in both directions.
Uppfinningen är naturligtvis inte begränsad till det på ritningen visade och ovan beskrivna utföringsexemplet. Således kan den kontinuerliga klordioxidtillsatsen eventuellt elimineras, då en hög säkerhet uppnås genom UV-bestålningen, cirkulationen och upphettningen av varmvattnet samt en återkommande tvättning med klordioxid av systemet.The invention is of course not limited to the exemplary embodiment shown in the drawing and described above. Thus, the continuous chlorine dioxide addition can possibly be eliminated, as a high safety is achieved through the UV irradiation, circulation and heating of the hot water as well as a recurring washing with chlorine dioxide of the system.
Claims (3)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9803467A SE512938C2 (en) | 1998-10-09 | 1998-10-09 | Method to prevent the occurrence and growth of disease-producing microorganisms, in particular Legionella bacteria, in water management systems |
| PCT/SE1999/001782 WO2000021889A1 (en) | 1998-10-09 | 1999-10-08 | Method of preventing occurrence and growth of pathogenic microorganisms, especially legionella bacteria, in water mains |
| AU10891/00A AU1089100A (en) | 1998-10-09 | 1999-10-08 | Method of preventing occurrence and growth of pathogenic microorganisms, especially legionella bacteria, in water mains |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9803467A SE512938C2 (en) | 1998-10-09 | 1998-10-09 | Method to prevent the occurrence and growth of disease-producing microorganisms, in particular Legionella bacteria, in water management systems |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| SE9803467D0 SE9803467D0 (en) | 1998-10-09 |
| SE9803467L SE9803467L (en) | 2000-04-10 |
| SE512938C2 true SE512938C2 (en) | 2000-06-12 |
Family
ID=20412910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE9803467A SE512938C2 (en) | 1998-10-09 | 1998-10-09 | Method to prevent the occurrence and growth of disease-producing microorganisms, in particular Legionella bacteria, in water management systems |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU1089100A (en) |
| SE (1) | SE512938C2 (en) |
| WO (1) | WO2000021889A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TR200102011A2 (en) * | 2001-07-11 | 2004-02-23 | Ergi̇n Karadağ Mehmet | Heating and hygiene devices for use in dental units and surgeries. |
| WO2007133634A1 (en) * | 2006-05-09 | 2007-11-22 | Clearwater Systems Corporation | Pulsed power water treatment |
| EP2262740A1 (en) | 2008-04-02 | 2010-12-22 | Walter Polak | System and method for treatment of drinking water |
| GB2463021A (en) * | 2008-08-28 | 2010-03-03 | Raymond Ian Cantrell | Water heater with low temperature outlet |
| ES2394566B1 (en) * | 2010-03-02 | 2013-12-13 | Asociación De Investigación De La Industria Textil | WATER TREATMENT SYSTEM FOR THE ELIMINATION OF LEGIONELLA IN WATER TRANSFER EQUIPMENT IN AIR CURRENT AND OPERATING PROCEDURE OF SUCH TREATMENT SYSTEM |
| EP2559664A1 (en) * | 2011-08-18 | 2013-02-20 | Siemens Aktiengesellschaft | Method and arrangement for water disinfection |
| FR3044654A3 (en) * | 2015-10-15 | 2017-06-09 | Bureau Evolution Amiante Ltd | MOBILE AND TRANSPORTABLE HOT WATER SUPPLY SYSTEM STERILIZED BY ULTRA VIOLET (UVC) AND WATER FILTRATION FOR DECONTAMINATION OF WORKERS (UCFUVC) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0338056B1 (en) * | 1987-10-23 | 1994-01-26 | Joh. Vaillant GmbH u. Co. | Apparatus for prevention of the occurence or proliferation of microorganisms in water for industrial use |
| DE3740005A1 (en) * | 1987-11-25 | 1989-06-08 | Katadyn Produkte Ag | DEVICE FOR DISINFECTING WASTEWATER |
| DE3813288A1 (en) * | 1988-04-20 | 1989-11-09 | Josef Bauer | Method and water-heating installation for water heating |
| DE3840516C3 (en) * | 1988-12-01 | 1996-08-01 | Duennleder Werner | Plant for heating domestic water and killing Legionella |
| GB2246421A (en) * | 1990-07-27 | 1992-01-29 | Electricity Ass Services Ltd | Hot loop water supply apparatus |
-
1998
- 1998-10-09 SE SE9803467A patent/SE512938C2/en not_active IP Right Cessation
-
1999
- 1999-10-08 AU AU10891/00A patent/AU1089100A/en not_active Abandoned
- 1999-10-08 WO PCT/SE1999/001782 patent/WO2000021889A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| SE9803467D0 (en) | 1998-10-09 |
| AU1089100A (en) | 2000-05-01 |
| WO2000021889A1 (en) | 2000-04-20 |
| SE9803467L (en) | 2000-04-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |