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WO2021209489A1 - Procédé permettant de prévoir une désinfection contre les légionelles - Google Patents

Procédé permettant de prévoir une désinfection contre les légionelles Download PDF

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Publication number
WO2021209489A1
WO2021209489A1 PCT/EP2021/059633 EP2021059633W WO2021209489A1 WO 2021209489 A1 WO2021209489 A1 WO 2021209489A1 EP 2021059633 W EP2021059633 W EP 2021059633W WO 2021209489 A1 WO2021209489 A1 WO 2021209489A1
Authority
WO
WIPO (PCT)
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.)
Ceased
Application number
PCT/EP2021/059633
Other languages
German (de)
English (en)
Inventor
Stephanie Kaschewski
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to CN202180028654.3A priority Critical patent/CN115427358A/zh
Priority to EP21719578.3A priority patent/EP4136058A1/fr
Publication of WO2021209489A1 publication Critical patent/WO2021209489A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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.
  • the method can be used to predict the disinfection performance, in particular of UV LEDs, in the hot water system. This allows a Targeted risk management is made possible and energy consumption is reduced while ensuring security.
  • 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.

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)

Abstract

L'invention concerne un procédé pour déterminer une concentration prévue en légionelles dans un courant d'eau en aval d'un traitement de l'eau avec un module à DEL UV, par l'intermédiaire d'un appareil de commande, le courant d'eau étant dirigé à travers le module à DEL UV, au moins un paramètre de puissance du module à DEL UV étant déterminé ou reçu, et une concentration prévue en légionelles dans un courant d'eau en aval d'un traitement de l'eau avec le module à DEL UV, étant calculée à partir du paramètre de puissance déterminé ou reçu, par l'intermédiaire d'un modèle mathématique. L'invention concerne en outre un appareil de commande et un dispositif correspondant.
PCT/EP2021/059633 2020-04-16 2021-04-14 Procédé permettant de prévoir une désinfection contre les légionelles Ceased WO2021209489A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202180028654.3A CN115427358A (zh) 2020-04-16 2021-04-14 用于预测军团菌消毒的方法
EP21719578.3A EP4136058A1 (fr) 2020-04-16 2021-04-14 Procédé permettant de prévoir une désinfection contre les légionelles

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
DE102020204839.8 2020-04-16

Publications (1)

Publication Number Publication Date
WO2021209489A1 true WO2021209489A1 (fr) 2021-10-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/059633 Ceased WO2021209489A1 (fr) 2020-04-16 2021-04-14 Procédé permettant de prévoir une désinfection contre les légionelles

Country Status (4)

Country Link
EP (1) EP4136058A1 (fr)
CN (1) CN115427358A (fr)
DE (1) DE102020204839A1 (fr)
WO (1) WO2021209489A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118059285A (zh) * 2024-04-22 2024-05-24 四川省畜牧科学研究院 一种用于禽畜圈舍的负离子消毒净化系统

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US20160130159A1 (en) * 2013-06-07 2016-05-12 Trojan Technologies System for determining uv dose in a reactor system
WO2018150425A1 (fr) * 2017-02-15 2018-08-23 Ramot At Tel-Aviv University Ltd. Procédé et dispositif de désinfection de l'eau
WO2019219864A1 (fr) * 2018-05-18 2019-11-21 Universiteit Gent Commande basée sur un modèle thermohydraulique et biologique
US20200048112A1 (en) * 2018-08-13 2020-02-13 Geberit International Ag Water disinfecting module, systems and methods

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US20160130159A1 (en) * 2013-06-07 2016-05-12 Trojan Technologies System for determining uv dose in a reactor system
WO2018150425A1 (fr) * 2017-02-15 2018-08-23 Ramot At Tel-Aviv University Ltd. Procédé et dispositif de désinfection de l'eau
WO2019219864A1 (fr) * 2018-05-18 2019-11-21 Universiteit Gent Commande basée sur un modèle thermohydraulique et biologique
US20200048112A1 (en) * 2018-08-13 2020-02-13 Geberit International Ag Water disinfecting module, systems and methods

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HESSLING MARTIN ET AL: "New Legionella Control Options by UV and Violet LEDs for Hospitals and Care Facilities", HOSPITAL PRACTICES AND RESEARCH, vol. 3, no. 3, 1 August 2018 (2018-08-01), pages 76 - 78, XP055815142, ISSN: 2476-3918, Retrieved from the Internet <URL:http://www.jhpr.ir/article_61098_18399d6db42cb42ef0fb5761cbc164b4.pdf> [retrieved on 20210617], DOI: 10.15171/hpr.2018.17 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118059285A (zh) * 2024-04-22 2024-05-24 四川省畜牧科学研究院 一种用于禽畜圈舍的负离子消毒净化系统

Also Published As

Publication number Publication date
DE102020204839A1 (de) 2021-10-21
CN115427358A (zh) 2022-12-02
EP4136058A1 (fr) 2023-02-22

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