EP4136058A1 - Verfahren zur vorhersage einer legionellendesinfektion - Google Patents
Verfahren zur vorhersage einer legionellendesinfektionInfo
- Publication number
- EP4136058A1 EP4136058A1 EP21719578.3A EP21719578A EP4136058A1 EP 4136058 A1 EP4136058 A1 EP 4136058A1 EP 21719578 A EP21719578 A EP 21719578A EP 4136058 A1 EP4136058 A1 EP 4136058A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- led module
- water flow
- control device
- legionella
- 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.)
- Pending
Links
- 241000589248 Legionella Species 0.000 title claims abstract description 38
- 208000007764 Legionnaires' Disease Diseases 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004659 sterilization and disinfection Methods 0.000 title description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000013178 mathematical model Methods 0.000 claims abstract description 12
- 230000001419 dependent effect Effects 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 6
- 230000002779 inactivation Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000003466 anti-cipated effect Effects 0.000 abstract description 7
- 239000003651 drinking water Substances 0.000 description 11
- 235000020188 drinking water Nutrition 0.000 description 11
- 238000000605 extraction Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 230000000249 desinfective effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012502 risk assessment Methods 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
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
-
- 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
- C02F2201/3222—Units using UV-light emitting diodes [LED]
-
- 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
- C02F2201/326—Lamp control systems
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/36—Biological material, e.g. enzymes or ATP
-
- 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
Definitions
- the invention relates to a method for determining a probable Legionella concentration in a water stream after a water treatment with a UV LED module by a control device.
- the invention also relates to a control device and an arrangement.
- Hot water pipes in building technology offer good conditions for microorganisms to multiply. If, for example, warm drinking water stagnates, the legionella that multiply there can pose a threat to house residents. Domestic hot water devices must adhere to hygienic requirements for the provision of domestic hot water. In Germany, the requirements for drinking water hygiene are regulated by the TrinkwV2001, DIN EN1717, DIN1988, DVGW worksheets W551 and W553 and VDI 6023.
- UV low-pressure vapor lamps which kill microorganisms through continuous UV irradiation can.
- the disadvantages of such UV low-pressure vapor lamps are the unknown disinfection result and the high energy consumption due to the UV low-pressure vapor lamps that are permanently switched on.
- risk states of the drinking water supply and in particular the legionella concentration cannot be estimated in advance for ongoing operation and the entire hot water pipe system.
- the object on which the invention is based can be seen in proposing a method for predicting a disinfection performance by means of UV LEDs.
- a method for determining a probable Legionella concentration in a water flow after a water treatment with a UV LED module is provided.
- the method can be carried out, for example, by a control device.
- the water flow is passed through at least one UV LED module and irradiated with UV rays.
- the UV LED module can be designed, for example, as a disinfection unit through which the water flow can be guided in a controlled manner.
- At least one performance parameter of a UV LED module is determined or received. Subsequently, an anticipated Legionella concentration in a water flow after the water treatment by the UV LED module is calculated using the determined or received performance parameters using a mathematical model.
- UV LEDs can reduce power consumption, since UV LEDs can be switched on and off quickly when required.
- the likely legionella concentration when operating UV LEDs can be estimated in advance. Furthermore, disinfection by-products can be avoided.
- a control device which is set up to carry out the method according to the invention.
- the control device can be an external control device that can be connected to one or more UV LED modules.
- the control device can be designed as an internal control device which is integrated in at least one UV LED module.
- an arrangement for treating a water stream with UV rays has at least one UV LED module with UV LEDs and at least one control device according to the invention.
- the arrangement can be used wherever hot water is generated and disinfected using UV LEDs.
- the arrangement can be used in gas thermal baths or boilers, electric flow heaters, heat pumps and in solar thermal or solar siphon systems with an integrated temperature sensor and flow sensor.
- UV LEDs In contrast to thermal disinfection, disinfection with UV LEDs produces comparatively low temperatures. Since heat pumps have impaired efficiency at high temperatures, the use of UV LEDs for disinfection is particularly advantageous in hot water systems with heat pumps. In particular, methods can create a detection or risk assessment of the drinking water quality with regard to microorganisms without additional sensors. This enables a particularly cost-efficient implementation.
- a theoretical or empirically determined model can be used as a mathematical model in order to determine a probable reduction in the probable legionella concentration through the use of the UV LED module.
- the at least one performance parameter of the UV LED module is determined or received in the form of a wavelength of the UV LED module and / or a radiation energy per area of the UV LED module.
- the disinfection of Legionella can be characterized depending on the wavelength and the UV dose of the UV LED module or the UV LEDs used in the UV LED module. Based on the length of time the water flow remains in the UV LED module, a prediction of the remaining legionella concentration can be determined.
- At least one performance parameter of the UV LED module is received from the UV LED module via a communication link, determined by evaluating measurement data from at least one sensor or received from a database of the control device. This allows the relevant performance parameters of the UV LED module to be stored in a database in advance so that the mathematical model enables the performance parameters to be taken into account in a technically particularly simple manner.
- At least one performance parameter can be determined using one or more sensors. This enables a precise determination of performance parameters by evaluating the measurement data of the sensors. For example, spectrometers or diodes can be used to directly or indirectly measure the performance parameters.
- the probable Legionella concentration in the water stream after the water treatment calculated by the UV LED module using a mathematical model designed as a conventional, simplified multi-target model according to the following formula:
- N 0 corresponds to the legionella number before the water treatment, N t to the legionella number after the water treatment, N to the probable Legionella concentration after the water treatment, k to a wavelength-dependent inactivation constant and F to the irradiation or radiation energy per area of the UV LED module used.
- the proportion of the remaining legionella or the number of legionella N t at time t is therefore dependent on the wavelength in the form of the wavelength-dependent inactivation constant k and on that of the UV dose F with the unit mJ / cm 2 .
- the disinfection rate of legionella results from the wavelength of the UV LEDs and the UV dose to which the legionella are exposed while they pass through the UV LED module.
- the wavelength and the UV dose can be taken from the technical data sheet from the manufacturer of UV LEDs for the UV LED module.
- the disinfection performance can be calculated and the likely legionella concentration after disinfection by the UV LED module can be predicted with the mathematical model.
- the anticipated Legionella concentration in the water flow after the water treatment by the UV LED module is adjusted in advance by a user in the form of a manual setting.
- At least one UV LED module is preferably controlled by the control device in accordance with the manual setting made by the user.
- the disinfection performance of the UV LED module can be influenced directly by the user.
- the disinfection performance can be set so that 90%, 95% or 99% of the possible legionella can be eliminated by irradiating the UV LED module.
- the dwell time can in particular be determined by a geometry and a permissible flow rate of the water through the UV LED module.
- the dwell time and / or the radiation energy per area can alternatively or additionally be increased by switching on additional UV LEDs in the UV LED module.
- a manual setting by the user can be made directly on the UV LED module or the control unit, for example.
- manual settings can be made by the user under the control of an app, which are transmitted to the control unit via a smartphone.
- the anticipated Legionella concentration in the water flow after the water treatment by the UV LED module is output to the user visually and / or acoustically.
- This measure enables the operation or disinfection by means of UV LEDs to take place in a targeted manner.
- the legionella concentration is estimated in advance.
- energy consumption can be reduced because the UV LEDs are operated as required and according to the user settings.
- the user can thus receive additional information about the condition of his drinking water. This has a positive influence on the "peace-of-mind" of the user or consumer.
- FIG. 1 shows a schematic representation of a drinking water supply with several extraction points and an arrangement for treating a water flow with UV rays according to a first embodiment
- FIG. 2 shows a schematic representation of a drinking water supply with several extraction points and several arrangements for treating a water flow with UV rays according to a further embodiment
- FIG. 3 shows a schematic flow diagram to illustrate the method according to an embodiment.
- FIG. 1 shows a schematic representation of a drinking water supply 1 as a system with several extraction points 2 and a centrally arranged arrangement 4 for treating a water flow 6 with UV rays according to a first embodiment.
- the installation location of the arrangement 4 is centrally directly behind a hot water storage tank 8.
- the legionella concentration at a withdrawal point or withdrawal point 2 depends on the installation location of the arrangement 4. Through a central Positioning the arrangement 4, the drinking water supply can be set up particularly cost-effectively. Depending on the extraction point 2, there is a larger amount of water in lines 10 of the drinking water supply 1, which remains unused for a longer period of time depending on its use.
- the arrangement 4 has a control device 12 and a UV LED module 14.
- the control device 12 can be used to control the UV LED module 14 according to user settings and to generate a feedback.
- the feedback can be in the form of a notification 16, which a user can receive or perceive.
- control device 12 can be implemented in the form of a smartphone notification or via a display 18.
- the control device 12 can display or attest the likely remaining legionella concentration after the water has been treated by the UV LED module 14.
- FIG. 2 shows a schematic representation of a drinking water supply 1 with several extraction points 2 and several arrangements 4 for treating a water flow in the lines 10 with UV rays according to a further embodiment.
- several decentralized arrangements 4 are provided here, which are positioned at the corresponding removal points 2. With such a decentralized positioning of the arrangements 4, increased safety can be achieved by disinfecting the water flow immediately before use.
- FIG. 3 shows a schematic flow chart to illustrate a method 20 according to an embodiment.
- the method 20 is used to determine a probable Legionella concentration after a water treatment with UV rays and can preferably be carried out by the control device 12.
- a step 22 at least one performance parameter of a UV LED module 14 is determined or received. This can be implemented, for example, by a sensor system (not shown) or by receiving manufacturer data from the UV LED module 14.
- the performance parameters of the UV LED module 14 are fed to a mathematical model.
- the mathematical model can be, for example, a simplified multi-target model.
- the mathematical model then calculates a probable Legionella concentration in a water flow 6 after the water treatment by the UV LED module 14 of the arrangement 4 on the basis of the determined or received performance parameter.
- the anticipated legionella concentration can also be specified by a user. This can be implemented by a user setting 28 which influences the activation of the UV LED module 14 by the control device 12.
- the anticipated Legionella concentration in the water flow 6 after the water treatment can be output to the user visually and / or acoustically by the at least one UV LED module 14.
- the output can be technically implemented, for example, via a wireless communication link 16 on a portable device, such as a smartphone, or via an optional display 18.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020204839.8A DE102020204839A1 (de) | 2020-04-16 | 2020-04-16 | Verfahren zur Vorhersage einer Legionellendesinfektion |
PCT/EP2021/059633 WO2021209489A1 (de) | 2020-04-16 | 2021-04-14 | Verfahren zur vorhersage einer legionellendesinfektion |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4136058A1 true EP4136058A1 (de) | 2023-02-22 |
Family
ID=75562735
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21719578.3A Pending EP4136058A1 (de) | 2020-04-16 | 2021-04-14 | Verfahren zur vorhersage einer legionellendesinfektion |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4136058A1 (de) |
CN (1) | CN115427358A (de) |
DE (1) | DE102020204839A1 (de) |
WO (1) | WO2021209489A1 (de) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MXPA03010331A (es) * | 2001-05-14 | 2005-04-11 | Microheat Inc | Sistema y metodo para limpieza o deshielo de un parabrisas. |
GB0706507D0 (en) * | 2007-04-03 | 2007-05-09 | Medi Immune Ltd | Protective device |
JP2009220058A (ja) * | 2008-03-18 | 2009-10-01 | Kurita Water Ind Ltd | 循環水系におけるレジオネラ属菌の制御方法及び該制御方法を用いた殺菌方法 |
EP2751032A4 (de) * | 2011-08-29 | 2015-06-17 | Purdue Research Foundation | Solares uv-desinfektionssystem mit kontinuierlichem fluss für trinkwasser |
CA2914752A1 (en) * | 2013-06-07 | 2014-12-11 | Trojan Technologies | System for determining uv dose in a reactor system |
DE102015208477A1 (de) * | 2015-05-07 | 2016-11-10 | Robert Bosch Gmbh | Vorrichtung und Verfahren zur Einspritzung von Wasser einer Brennkraftmaschine |
WO2018150425A1 (en) * | 2017-02-15 | 2018-08-23 | Ramot At Tel-Aviv University Ltd. | Method and device for water disinfection |
DK3794287T3 (da) * | 2018-05-18 | 2023-12-18 | Univ Gent | Styring på basis af en termohydraulisk og biologisk model |
CN108640216A (zh) * | 2018-06-27 | 2018-10-12 | 无锡厚发自动化设备有限公司 | 一种智能紫外消毒柜 |
US11117816B2 (en) * | 2018-08-13 | 2021-09-14 | Geberit International Ag | Water disinfecting module, systems and methods |
-
2020
- 2020-04-16 DE DE102020204839.8A patent/DE102020204839A1/de active Pending
-
2021
- 2021-04-14 WO PCT/EP2021/059633 patent/WO2021209489A1/de unknown
- 2021-04-14 EP EP21719578.3A patent/EP4136058A1/de active Pending
- 2021-04-14 CN CN202180028654.3A patent/CN115427358A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
DE102020204839A1 (de) | 2021-10-21 |
CN115427358A (zh) | 2022-12-02 |
WO2021209489A1 (de) | 2021-10-21 |
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