WO2017156583A1 - Système et procédé de surveillance de désinfection - Google Patents

Système et procédé de surveillance de désinfection Download PDF

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Publication number
WO2017156583A1
WO2017156583A1 PCT/AU2017/050231 AU2017050231W WO2017156583A1 WO 2017156583 A1 WO2017156583 A1 WO 2017156583A1 AU 2017050231 W AU2017050231 W AU 2017050231W WO 2017156583 A1 WO2017156583 A1 WO 2017156583A1
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WO
WIPO (PCT)
Prior art keywords
disinfection
fluid
disinfectant
parameter indicative
turbidity
Prior art date
Application number
PCT/AU2017/050231
Other languages
English (en)
Inventor
Terry MAHONY
Adrian MALYON
Original Assignee
Sydney Water Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2016900986A external-priority patent/AU2016900986A0/en
Application filed by Sydney Water Corporation filed Critical Sydney Water Corporation
Priority to AU2017234381A priority Critical patent/AU2017234381A1/en
Publication of WO2017156583A1 publication Critical patent/WO2017156583A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—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
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • 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
    • C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
    • 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]
    • C02F2209/008—Processes using a programmable logic controller [PLC] comprising telecommunication features, e.g. modems or antennas
    • 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
    • C02F2209/04—Oxidation reduction potential [ORP]
    • 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
    • C02F2209/40—Liquid flow rate
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

Definitions

  • the present disclosure relates generally to monitoring of a fluid and in particular to an apparatus and method for monitoring disinfection of a fluid system.
  • the apparatus and method have been developed primarily for monitoring disinfection of potable water and recycled water assets and will be described hereinafter with reference to this application. However, it will be appreciated that the apparatus and method are not limited to these applications and may also be used in other applications.
  • Testing to determine whether disinfection has been achieved typically involves taking discrete samples of the water contained in the pipeline undergoing treatment and either sending the water samples to a laboratory for testing and/or testing the water samples in the field with portable meters to determine whether one or more parameters falls within the relevant standards of disinfection.
  • an apparatus for field monitoring disinfection of a fluid system undergoing a disinfection process comprising: an inlet for connection to a fluid system undergoing a disinfection process; an instrument for detecting a parameter indicative of turbidity of a fluid flow received from the inlet;
  • a controller associated with the instrument for detecting a parameter indicative of turbidity and the instrument for detecting a parameter indicative of concentration of the disinfectant the controller being configured to output a signal indicative of successful disinfection of the fluid system if detected values of the parameter indicative of turbidity and of the parameter indicative of concentration of the disinfectant satisfy a predetermined criteria for successful disinfection of a target microorganism.
  • the predetermined criteria may comprise both:
  • the controller may be adapted to receive one or more inputs relating to: the system undergoing the disinfection process, applicable regulatory requirements, source of the fluid, end use of the fluid, target microorganism(s) of the disinfection, and/or type of disinfectant used in the disinfection process; and the predetermined criteria may be calibrated based on the one or more inputs.
  • the predetermined criteria may account for an effect of the magnitude of the detected values of the parameter indicative of concentration of the disinfectant on the time required for successful disinfection of the target microorganism(s), such that higher detected values of the parameter indicative of concentration of the disinfectant may cause the signal indicative of successful disinfection of the fluid system to be output sooner and lower detected values of the parameter indicative of concentration of the disinfectant may cause the signal indicative of successful disinfection of the fluid system to be output later.
  • the predetermined criteria may account for an effect of the magnitude of the detected values of the parameter indicative of turbidity on the time required for successful disinfection of the target
  • the predetermined criteria may account for the effect of temperature of the fluid and/or pH of the fluid on to the time required for successful disinfection of the target microorganism(s).
  • the apparatus may comprise a thermometer and/or a pH sensor/meter and may be configured to measure the temperature and/or pH of the fluid at the commencement of disinfection monitoring and/or intermittently during disinfection monitoring.
  • the apparatus may be configured to use the detected values of the or each said parameter to determine a cumulative disinfecting effect of the disinfection process, wherein the signal indicative of successful disinfection of the fluid system is output when the cumulative disinfecting effect determined is sufficient to successfully disinfect the target microorganism(s).
  • the apparatus may further comprise an instrument for determining a location of the apparatus, for example a global positioning system (GPS) device.
  • GPS global positioning system
  • the apparatus may further comprise a transmitter for transmitting over a
  • the transmitter may also act as a receiver for the instrument for determining the location of the apparatus.
  • the apparatus may further comprise a data storage device for storing data relating to one or more of: detected values of the parameter indicative of turbidity; detected values of the parameter indicative of concentration of the disinfectant; the location of the apparatus; and/or the signal indicative of successful disinfection of the fluid system.
  • the parameter indicative of turbidity may be any suitable measure of turbidity, including turbidity itself measured in Nephelometric Turbidity Units (NTU) or equivalent.
  • NTU Nephelometric Turbidity Units
  • the parameter indicative of concentration of the disinfectant may be any suitable measure indicative of concentration.
  • the parameter indicative of concentration of the disinfectant may be oxidation-reduction potential (ORP).
  • ORP oxidation-reduction potential
  • the minimum predetermined value of ORP may vary depending on a number of factors, such as the system undergoing disinfection, the type of fluid carried by the system, and/or any applicable regulatory requirements.
  • the minimum predetermined value of ORP may be at least 500 mV or at least 600 mV or at least 700 mV or at least 750 mV.
  • the maximum predetermined value of the parameter indicative of turbidity and/or the predetermined period of time may also vary depending on various factors, such as the system undergoing disinfection, the type of fluid carried by the system, and/or any applicable regulatory requirements. Depending on such factors, the maximum predetermined value of the parameter indicative of turbidity may be a value indicating a turbidity of less than around 5 NTU or less than around 3 NTU or less than around 2 NTU. Depending on the same factors, and/or others such as the detected values of the parameter indicative of concentration of the disinfectant, temperature of the fluid and/or pH of the fluid the predetermined period of time may be at least 1 minute, at least 90 seconds or at least 2 minutes.
  • the apparatus may be used to monitor disinfection of a fluid system associated with any one of a variety of fluids.
  • the apparatus may be used to monitor disinfection of a fluid system for raw water, recycled water, or waste water (e.g. tertiary effluent), or fluid systems associated with cooling towers or swimming pools or food and beverage production or distribution systems.
  • the fluid system may comprise one or more items selected from the group consisting of: one or more pipelines, one or more tanks or reservoirs, one or more filters, one or more valves, one or more manifolds or distribution blocks or pumps, any other component of a water distribution system that requires disinfection, or any
  • an apparatus for field monitoring disinfection of a fluid system undergoing a disinfection process comprising:
  • the controller being configured to output a signal indicative of a successful disinfection of the fluid system if the detected values of ORP satisfy a predetermined criteria for successful disinfection of a target microorganism.
  • the predetermined criteria may comprise the detected values of ORP remaining above a minimum predetermined value for at least a predetermined length of time.
  • the controller may be adapted to receive one or more inputs relating to: the system undergoing the disinfection process, applicable regulatory requirements, source of the fluid, end use of the fluid, target microorganism(s) of the disinfection, and/or type of disinfectant used in the disinfection process; and the predetermined criteria may be calibrated based on the one or more inputs.
  • the predetermined criteria may account for an effect of the magnitude of the detected values of the parameter indicative of concentration of the disinfectant on the time required for successful disinfection of the target microorganism(s), such that higher detected values of the parameter indicative of concentration of the disinfectant may cause the signal indicative of successful disinfection of the fluid system to be output sooner and lower detected values of the parameter indicative of concentration of the disinfectant may cause the signal indicative of successful disinfection of the fluid system to be output later.
  • the predetermined criteria may account for an effect of the magnitude of the detected values of the parameter indicative of turbidity on the time required for successful disinfection of the target
  • the predetermined criteria may account for the effect of temperature of the fluid and/or pH of the fluid on to the time required for successful disinfection of the target microorganism(s).
  • the apparatus may comprise a thermometer and/or a pH sensor/meter and may be configured to measure the temperature and/or pH of the fluid at the commencement of disinfection monitoring and/or intermittently during disinfection monitoring.
  • the apparatus may be configured to use the detected values of the or each said parameter to determine a cumulative disinfecting effect of the disinfection process, wherein the signal indicative of successful disinfection of the fluid system is output when the cumulative disinfecting effect determined is sufficient to successfully disinfect the target microorganism(s).
  • the apparatus may further comprise an instrument for detecting a parameter indicative of turbidity of a fluid flow received from the inlet and the controller may be responsive to same.
  • the controller may be configured to output the signal indicative of successful disinfection of the fluid system if both: the detected values of the parameter indicative of turbidity remain below a maximum predetermined value;
  • the parameter indicative of turbidity may be any suitable measure of turbidity, including turbidity itself measured in NTU or equivalent.
  • the minimum predetermined value of ORP may vary depending on a number of factors, such as the system undergoing disinfection, the type of fluid carried by the system, and/or any applicable regulatory requirements. Depending on such factors, the minimum predetermined value of ORP may be at least 500 mV, at least 600 mV, at least 700 mV or at least 750 mV.
  • the maximum predetermined value of the parameter indicative of turbidity and/or the predetermined period of time may also vary depending on various factors, such as the system undergoing disinfection, the type of fluid carried by the system, and/or any applicable regulatory requirements. Depending on such factors, the maximum predetermined value of the parameter indicative of turbidity may be a value indicating a turbidity of less than around 5 NTU or less than around 3 NTU or less than around 2 NTU. Depending on the same factors, and/or others such as the detected values of ORP, temperature of the fluid and/or pH of the fluid, the predetermined period of time may be at least 1 minute, at least 90 seconds or at least 2 minutes.
  • the apparatus may be used to monitor disinfection of a fluid system associated with any one of a variety of fluids.
  • the apparatus may be used to monitor disinfection of a fluid system for raw water, recycled water, or waste water (e.g. tertiary effluent), or fluid systems associated with cooling towers or swimming pools or food and beverage production or distribution systems.
  • the fluid system may comprise one or more items selected from the group consisting of: one or more pipelines, one or more tanks or reservoirs, one or more filters, one or more valves, one or more manifolds or distribution blocks or pumps, any other component of a water distribution system that requires disinfection, or any
  • the apparatus may further comprise an instrument for determining a location of the apparatus, for example a global positioning system (GPS) device.
  • the apparatus may further comprise a transmitter for transmitting over a communications network, such as a mobile network, a WiFi network, the Internet and/or a local or wide area network, data relating to one or more of: detected values of the parameter indicative of turbidity; detected values of ORP; a location of the apparatus; and/or the signal indicative of successful disinfection of the fluid system.
  • the transmitter may also act as a receiver for the instrument for determining the location of the apparatus.
  • the apparatus may further comprise a data storage device for storing data relating to one or more of: detected values of the parameter indicative of turbidity; detected values of ORP; the location of the apparatus; and/or the signal indicative of successful disinfection of the fluid system.
  • Also disclosed herein is a method of field monitoring disinfection of a fluid system undergoing a disinfection process, the method comprising:
  • the predetermined criteria may comprise both:
  • the predetermined criteria may be calibrated based on one or more of: the system undergoing the disinfection process, applicable regulatory requirements, source of the fluid, end use of the fluid, target microorganism(s) of the disinfection, and/or type of disinfectant used in the disinfection process.
  • the predetermined criteria may account for an effect of the magnitude of the detected values of the parameter indicative of concentration of the disinfectant on the time required for successful disinfection of the target microorganism(s), such that higher detected values of the parameter indicative of concentration of the disinfectant may cause the signal indicative of successful disinfection of the fluid system to be output sooner and lower detected values of the parameter indicative of concentration of the disinfectant may cause the signal indicative of successful disinfection of the fluid system to be output later.
  • the predetermined criteria may account for an effect of the magnitude of the detected values of the parameter indicative of turbidity on the time required for successful disinfection of the target
  • the predetermined criteria may account for the effect of temperature of the fluid and/or pH of the fluid on to the time required for successful disinfection of the target microorganism(s). Measurement of the temperature and/or pH of the fluid may be performed at the commencement of disinfection monitoring and/or intermittently during disinfection monitoring.
  • the detected values of the or each said parameter may be used to determine a cumulative disinfecting effect of the disinfection process, wherein the signal indicative of successful disinfection of the fluid system is output when the cumulative disinfecting effect determined is sufficient to successfully disinfect the target microorganism(s).
  • the method may further comprise determining a location of the apparatus.
  • the method may further comprise transmitting over a communications network, such as a mobile network, WiFi network, the Internet and/or local or wide area network, data relating to one or more of: detected values of the parameter indicative of turbidity; detected values of the parameter indicative of concentration of the disinfectant; a location of the apparatus; and/or the signal indicative of successful disinfection of the fluid system.
  • a communications network such as a mobile network, WiFi network, the Internet and/or local or wide area network, data relating to one or more of: detected values of the parameter indicative of turbidity; detected values of the parameter indicative of concentration of the disinfectant; a location of the apparatus; and/or the signal indicative of successful disinfection of the fluid system.
  • the method may further comprise storing data relating to one or more of: detected values of the parameter indicative of turbidity; detected values of the parameter indicative of concentration of the disinfectant; a location of the apparatus; and/or the signal indicative of successful disinfection of the fluid system.
  • the parameter indicative of turbidity may be any suitable measure of turbidity, including turbidity itself measured in NTU or equivalent.
  • the parameter indicative of concentration of the disinfectant may be any suitable measure indicative of concentration.
  • the parameter indicative of concentration of the disinfectant may be oxidation-reduction potential (ORP).
  • ORP oxidation-reduction potential
  • the minimum predetermined value of ORP may vary depending on a number of factors, such as the system undergoing disinfection, the type of fluid carried by the system, and/or any applicable regulatory requirements.
  • the minimum predetermined value of ORP may be at least 500 mV, at least 600 mV, at least 700 mV or at least 750 mV.
  • the maximum predetermined value of the parameter indicative of turbidity and/or the predetermined period of time may also vary depending on various factors, such as the system undergoing disinfection, the type of fluid carried by the system, and/or any applicable regulatory requirements. Depending on such factors, the maximum predetermined value of the parameter indicative of turbidity may be a value indicating a turbidity of less than around 5 NTU or less than around 3 NTU or less than around 2 NTU. Depending on the same factors, and/or others such as the detected values of the parameter indicative of concentration of the disinfectant, temperature of the fluid and/or pH of the fluid, the predetermined period of time may be at least 1 minute, at least 90 seconds or at least 2 minutes.
  • the method may be used to monitor disinfection of a fluid system associated with any one of a variety of fluids.
  • the apparatus may be used to monitor disinfection of a fluid system for raw water, recycled water, or waste water (e.g. tertiary effluent), or fluid systems associated with cooling towers or swimming pools or food and beverage production or distribution systems.
  • Also disclosed herein is a method of field monitoring disinfection of a fluid system undergoing a disinfection process, the method comprising: connecting an apparatus for field monitoring disinfection of a fluid system to a fluid system undergoing a disinfection process such that the apparatus receives a fluid flow from the fluid system;
  • the predetermined criteria may comprise the detected values of ORP remaining above a minimum predetermined value for at least a predetermined length of time.
  • the method may further comprise detecting a parameter indicative of turbidity of the fluid flow and the predetermined criteria may comprise both:
  • the predetermined criteria may be calibrated based on one or more of: the system undergoing the disinfection process, applicable regulatory requirements, source of the fluid, end use of the fluid, target microorganism(s) of the disinfection, and/or type of disinfectant used in the disinfection process.
  • the predetermined criteria may account for an effect of the magnitude of the detected values of the parameter indicative of concentration of the disinfectant on the time required for successful disinfection of the target microorganism(s), such that higher detected values of the parameter indicative of concentration of the disinfectant may cause the signal indicative of successful disinfection of the fluid system to be output sooner and lower detected values of the parameter indicative of concentration of the disinfectant may cause the signal indicative of successful disinfection of the fluid system to be output later.
  • the predetermined criteria may account for an effect of the magnitude of the detected values of the parameter indicative of turbidity on the time required for successful disinfection of the target
  • the predetermined criteria may account for the effect of temperature of the fluid and/or pH of the fluid on to the time required for successful disinfection of the target microorganism(s). Measurement of the temperature and/or pH of the fluid may be performed at the commencement of disinfection monitoring and/or intermittently during disinfection monitoring.
  • the detected values of the or each said parameter may be used to determine a cumulative disinfecting effect of the disinfection process, wherein the signal indicative of successful disinfection of the fluid system is output when the cumulative disinfecting effect determined is sufficient to successfully disinfect the target microorganism(s).
  • the method may further comprise determining a location of the apparatus.
  • the method may further comprise transmitting over a communications network, such as a mobile network, WiFi network, the Internet and/or local or wide area network, data relating to one or more of: detected values of the parameter indicative of turbidity; detected values of ORP; a location of the apparatus; and/or the signal indicative of successful disinfection of the fluid system.
  • a communications network such as a mobile network, WiFi network, the Internet and/or local or wide area network, data relating to one or more of: detected values of the parameter indicative of turbidity; detected values of ORP; a location of the apparatus; and/or the signal indicative of successful disinfection of the fluid system.
  • the method may further comprise storing data relating to one or more of: detected values of the parameter indicative of turbidity; detected values of ORP; a location of the apparatus; and/or the signal indicative of successful disinfection of the fluid system.
  • the parameter indicative of turbidity may be any suitable measure of turbidity, including turbidity itself measured in NTU or equivalent.
  • the minimum predetermined value of ORP may vary depending on a number of factors, such as the system undergoing disinfection, the type of fluid carried by the system, and/or any applicable regulatory requirements. Depending on such factors, the minimum predetermined value of ORP may be at least 500 mV, at least 600 mV, at least 700 mV, or at least 750 mV.
  • the maximum predetermined value of the parameter indicative of turbidity and/or the predetermined period of time may also vary depending on various factors, such as the system undergoing disinfection, the type of fluid carried by the system, and/or any applicable regulatory requirements. Depending on such factors, the maximum predetermined value of the parameter indicative of turbidity may be a value indicating a turbidity of less than around 5 NTU or less than around 3 NTU or less than around 2 NTU. Depending on the same factors, and/or others such as the detected values of ORP, temperature of the fluid and/or pH of the fluid, the predetermined period of time may be at least 1 minute, at least 90 seconds or at least 2 minutes.
  • the method may be used to monitor disinfection of a fluid system associated with any one of a variety of fluids.
  • the apparatus may be used to monitor disinfection of a fluid system for raw water, recycled water, or waste water (e.g. tertiary effluent), or fluid systems associated with cooling towers or swimming pools or food and beverage production or distribution systems.
  • a system for disinfecting a fluid system comprising:
  • the apparatus for field monitoring disinfection of a fluid system and the apparatus for supplying disinfectant to a fluid in the fluid system are communicatively linked.
  • the apparatus for field monitoring disinfection of a fluid system may be configured to transmit a signal indicative of a status of disinfection of the fluid system to the apparatus for supplying disinfectant to the fluid.
  • the apparatus for supplying disinfectant to the fluid may modify the flowrate of disinfectant to the fluid.
  • the apparatus for field monitoring disinfection of a fluid system may send a signal indicative of successful disinfection of the fluid system to the apparatus for supplying disinfectant to a fluid.
  • the apparatus for supplying disinfectant to a fluid may reduce or stop a flow of disinfectant to the fluid and/or may switch off or into a standby mode.
  • the apparatus for field monitoring disinfection of a fluid system may switch off or into a standby mode.
  • the apparatus for field monitoring disinfection of a fluid system may send a signal indicative of commencement of disinfection monitoring to the apparatus for supplying disinfectant to a fluid.
  • the apparatus for supplying disinfectant to a fluid may switch from a standby mode into an active mode and/or start a flow of disinfectant to the fluid in the fluid system.
  • the apparatus for supplying disinfectant to a fluid may send to the apparatus for field monitoring disinfection of a fluid system a signal indicative of
  • commencement of disinfectant supply Receipt of the signal indicative of commencement of disinfectant supply may trigger the apparatus for field monitoring disinfection of a fluid system to switch from a standby mode into an active mode and/or to start monitoring disinfection of the fluid system.
  • the apparatus for field monitoring disinfection of a fluid system may start monitoring disinfection of the fluid system immediately after receiving the signal indicative of commencement of disinfectant supply, or after a predetermined delay.
  • Figure 1 is a perspective view of an embodiment of an apparatus for field monitoring disinfection of a fluid system
  • Figure 2 is a front view of an embodiment of an apparatus for field monitoring disinfection of a fluid system, shown mounted on a wheeled trolley;
  • Figure 3 is a side view of the apparatus of Figure 2;
  • Figure 4 is a schematic diagram of components of the apparatus of Figure 1; and Figure 5 is graph showing an example of a measured change in ORP and turbidity of a fluid system undergoing disinfection as a function of time.
  • Figure 1 shows an embodiment of an apparatus 100 for field monitoring disinfection of a fluid system, such as a potable water distribution system comprising a pipeline and any associated components, such as one or more tanks or reservoirs, one or more filters, one or more valves, one or more manifolds or distribution blocks or pumps, and/or any other component the system that requires disinfection.
  • the apparatus 100 may also be used to monitor disinfection of other fluid systems for raw water, recycled water, or waste water (e.g. tertiary effluent), or fluid systems associated with cooling towers or swimming pools or food and beverage production or distribution systems.
  • the apparatus 100 comprises a housing 101 having an inlet 102 for connection to a water asset or other fluid system undergoing disinfection using an oxidising disinfectant, such as chlorine, chlorine dioxide, chloramine, hydrogen peroxide or ozone.
  • the housing 101 is an ingress protection (IP) rated plastic enclosure.
  • IP ingress protection
  • the housing 101 is configured to be attached to a trolley 120 for ease of transport between on-site sampling points.
  • the embodiment shown in Figures 2 and 3 further comprises a pair of handles 103 mounted to the housing 101 for lifting and positioning the apparatus 100.
  • the apparatus 100 also comprises an on/off switch 104 and a user interface 105 for receiving user input.
  • the user interface 105 may also be adapted to display data to a user.
  • a signalling device 106 in the form of three LED lights (red 106a, amber 106b and green 106c) is also mounted on the apparatus for outputting a signal indicative of the following disinfection statuses of the fluid system: status A (corresponding with illumination of red LED 106a) in which disinfection is not occurring; status B (corresponding with illumination of amber LED 106b) in which disinfection is occurring but not complete; and status C (corresponding with illumination of green LED 106c) in which disinfection is complete. These disinfection statuses are described in more detail below.
  • the inlet 102 is adapted for engagement to an inflow hose which can be connected to the fluid system, for example via a standpipe in fluid communication with a pipeline undergoing disinfection.
  • Outlets 107 are further provided through which the fluid flow can exit the apparatus 100.
  • FIG. 4 shows a schematic diagram of components of apparatus 100, which comprise an instrument 108 for detecting a parameter indicative of turbidity T of the fluid flow received from the inlet 102 and an instrument 109 for detecting a parameter indicative of concentration of a disinfectant D in the fluid flow received from the inlet 102.
  • the instruments 108 and 109 are mounted in parallel, such that fluid flow received from the inlet 102 is split into two fluid pathways 110 and 111, with each fluid pathway 110 and 111 connected to a respective instrument 108 and 109.
  • the instruments 108 and 109 may be located in series such that the fluid flow received from the inlet 102 flows through the respective instruments 108 and 109 consecutively.
  • instrument 108 is a turbidity meter, which measures turbidity directly in Nephelometric
  • Turbidity Units NTU
  • instrument 109 is a flow cell for measuring oxidation-reduction potential (ORP), wherein ORP is a measure indicative of disinfectant concentration D.
  • a controller 112 is associated with instruments 108 and 109.
  • the controller 112 is further associated with the signalling device 106 and is configured to output a signal, via the signalling device 106, indicative successful disinfection of the fluid system if detected values of turbidity and of ORP satisfy a predetermined criteria.
  • the predetermined criteria may be calibrated based on one or more of: the system and/or fluid undergoing disinfection, and/or any applicable regulatory requirements and/or one or more parameters selected from: source of the fluid, end use of the fluid, target microorganism(s) of the disinfection, disinfectant being used, concentration of the disinfectant in the fluid, temperature of the fluid and/or pH of the fluid.
  • the predetermined criteria comprises both: (1) instrument 108 indicating that turbidity T remains below a maximum predetermined value T max , and (2) instrument 109 indicating that ORP (i.e. the parameter indicative of disinfectant concentration D) remains above a minimum predetermined value D m i n , for at least a predetermined period of time tmin-
  • the controller 112 may further be associated with the user interface 105 such that the user may input data, for example to set T max , D mm , and/or t mm .
  • T max , D m i n and/or t m i n may be determined by the user and directly input via the user interface 105, or may be set by controller 112 in response to user input data or other data input(s), such as data relating to the source of the fluid, end use of the fluid, target
  • microorganism(s) of the disinfection, disinfectant being used concentration of the disinfectant in the fluid, temperature of the fluid and/or pH of the fluid.
  • the source of the fluid for disinfection may indicate different properties, such as the types and quantities of microorganisms most likely to be present in the fluid. As such, the source of the fluid may act as a proxy for the target microorganism(s) of the disinfection. Moreover, different microorganisms require different concentrations of disinfectant and different contact times with the disinfectant to achieve disinfection. Accordingly, identification of the target microorganisms and/or of the source of the fluid may influence the selection of values of T max , D min and/or t min . [0072] The end use of the fluid after disinfection may also influence the selection of T max , D m i n and/or t m i n values.
  • fluid intended for use as potable water would generally require more conservative values for T max , D m i n and/or t m i n , whereas less conservative values may be appropriate for fluid intended for environmental discharge.
  • a fluid intended for use as potable water may require turbidity T at the completion of disinfection to be lower than the turbidity T that may be appropriate for fluid intended for environmental discharge.
  • fluid intended for environmental discharge may require a relatively high D m i n to reduce its impact on existing ecosystems in the environment to which the treated fluid is discharged.
  • Disinfectants for fluids may include any oxidant such as chlorine, chlorine dioxide, chloramine, hydrogen peroxide and ozone.
  • oxidant such as chlorine, chlorine dioxide, chloramine, hydrogen peroxide and ozone.
  • the disinfectant used for the disinfection may also influence the selection of T max , D m i n and/or t m i n values.
  • the efficacy of a disinfectant may be reduced with decrease in temperature and/or increase in pH. Accordingly, the temperature and pH of the fluid undergoing disinfection may also influence the selection of T max , D m i n and/or t m i n values.
  • the user may input data indicating the source and intended use of the fluid undergoing disinfection and the type of disinfectant being used via the user interface 105, and the controller 112 may be responsive to instruments that provide data indicating the temperature and pH of the fluid undergoing disinfection. From these inputs, the controller 112 sets the appropriate T max , D m i n and/or t m i n values. The user or a controller 112 may interrogate a a look up table such as is shown in Table 1 below to facilitate setting the T max , D m i n and/or t m i n values. As system parameters, such as the pH and temperature of the fluid undergoing disinfection may vary during the disinfection process, the controller may adjust the T max , D m i n and/or t m i n values continuously or intermittently.
  • Table 1 depicts Ct values, i.e. the product of the concentration of the disinfectant and the contact time with the fluid being treated, for a 3-log inactivation (i.e. reduction by a factor of 10 ) of the microorganism Giardia cysts with free chlorine as the disinfectant.
  • Ct values for this system vary with temperature, pH and disinfectant concentration.
  • the contact times in Table 1 can be adjusted for turbidity to account for the effect of turbidity on the contact time required to achieve 3-log inactivation of the microorganism.
  • Table 1 Ct values (min-m /L) for a 3-lo inactivation of Giardia c sts b free chlorine
  • T max , D m i n and/or t m i n values may be based on a mathematical model, for example a mathematical model comprising an algorithm representative of the data in Table 1 and/or similar tables for other microorganisms and/or other disinfectants and/or different levels of microorganism inactivation, relating the input data to the appropriate Tmax, Dmin and/or t m i n values.
  • the mathematical model can also be configured to account for the effect of turbidity on the contact time required to achieve the desired level of inactivation of the microorganism.
  • the apparatus 100 may include a global positioning system (GPS) device or similar instrument for determining the location of the apparatus 100 and thereby the sampling location. This allows for geotagging of the data collected by the apparatus 100.
  • GPS global positioning system
  • the apparatus 100 comprises an electronic memory, such as a data logger 113, for storing data related to: the detected values of turbidity T and ORP; and the sampling location as determined by the onboard GPS device.
  • the data logger 113 may also store data indicative of the disinfection status A, B or C, as well as date/time data.
  • the apparatus 100 also comprises a transmitter 114 for transmitting all or a selection of this data over a communications network. For example, in some cases, the transmitter may only transmit data indicative of disinfection status C (i.e. disinfection complete) and the sampling location. This transmission of data allows for remote monitoring of the disinfection process by relevant parties and for external data logging of the disinfection process.
  • the transmitter 114 may also act as a receiver for the onboard GPS device.
  • the apparatus 100 may be battery operated and/or connectable to mains power through a plug attachment.
  • the apparatus 100 is powered by a battery 115.
  • the apparatus 100 comprises one or more solar panels 116 for supplying electrical energy to the battery 115 via a charge controller 117.
  • the apparatus 100 is connected via the inlet 102 to the fluid system undergoing disinfection.
  • the inflowing fluid passes through the instruments 108 and 109 for monitoring of the fluid's turbidity T and ORP as a function of time t.
  • the monitoring of T and ORP may be continuous or intermittent.
  • An outlet hose may be connected to the outlets 107 to direct outflowing fluid away from the area of operation.
  • status A (disinfection not occurring) applies when the apparatus 100 is turned on but whilst the detected turbidity T is above T max and/or the detected ORP is below D m i n .
  • Status B (disinfection occurring but not yet complete) applies when, for less than t m i n , both the detected turbidity T is below T max and the detected ORP is above D m i n .
  • Status C (disinfection complete) applies when, for at least t m i n , both the detected turbidity T has been below T max and the detected ORP has been above D m i n .
  • T max is set at 2 NTU
  • D m in is 750 mV
  • t m i n is 2 minutes.
  • the apparatus 100 may be communicatively linked, for example via the GSM network or another communications network, with a disinfectant dosing apparatus that is supplying disinfectant to fluid in the fluid system to facilitate a degree of automation of the disinfection and disinfection monitoring processes.
  • the apparatus 100 may transmit a signal indicative of the status of disinfection of the fluid system to the disinfectant dosing apparatus.
  • the disinfectant dosing apparatus may modify the flowrate of disinfectant to the fluid.
  • the apparatus 100 may send a signal indicative of successful disinfection of the fluid system to the disinfectant dosing apparatus and, on receiving the signal, the disinfectant dosing apparatus may reduce or stop a flow of disinfectant to the fluid and/or may switch off or into a standby mode.
  • the apparatus 100 may switch off or into a standby mode. Similarly, the apparatus 100 may send a signal indicative of commencement of disinfection monitoring to the disinfectant dosing apparatus and, on receiving this signal, the disinfectant dosing apparatus may start a flow of disinfectant to the fluid or switch from a standby mode into an active mode. Alternatively, the disinfectant dosing apparatus may send to apparatus 100 a signal indicative of commencement of disinfectant supply and receipt of the signal may trigger apparatus 100 to start monitoring disinfection of the fluid system. In such an embodiment, apparatus 100 may start monitoring disinfection immediately after receiving the signal indicative of commencement of disinfectant supply, or after a predetermined delay.

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Food Science & Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Medicinal Chemistry (AREA)
  • Pathology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

La présente invention concerne un appareil (100) pour surveiller sur le terrain la désinfection d'un système fluidique. L'appareil comprend une entrée (102) pour raccordement à un système fluidique subissant une désinfection, et des instruments (108, 109) pour détecter des paramètres indicatifs de la turbidité T et de la concentration de désinfectant D. Un dispositif de commande (112) est associé aux instruments (108, 109) et est configuré pour délivrer en sortie un signal indicatif d'une désinfection réussie du système fluidique si les valeurs détectées de concentration de désinfectant D et de turbidité T satisfont à des critères prédéterminés.
PCT/AU2017/050231 2016-03-16 2017-03-16 Système et procédé de surveillance de désinfection WO2017156583A1 (fr)

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AU2016900986A AU2016900986A0 (en) 2016-03-16 Disinfection monitoring system and method

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109172846A (zh) * 2018-10-23 2019-01-11 广州达意隆包装机械股份有限公司 一种消毒系统及消毒控制方法
CN112675346A (zh) * 2020-12-14 2021-04-20 青岛海尔空调器有限总公司 水洗空气装置的水箱消毒方法、装置、系统及介质

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220016293A1 (en) * 2020-07-17 2022-01-20 Hand Held Products, Inc. Systems and methods for monitoring disinfection of a device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050009192A1 (en) * 2003-07-11 2005-01-13 Page Daniel V. Remote monitoring system for water
WO2009037699A2 (fr) * 2007-09-17 2009-03-26 Atlantium Technologies Ltd. Contrôle des processus d'oxydation dans des systèmes de traitement de liquide par lumière ultraviolette
WO2014025478A1 (fr) * 2012-08-10 2014-02-13 Xylem Water Solutions Zelienople Llc Procédé et appareil de surveillance et de régulation de l'ozonation et de la filtration aérée au moyen de mesures dans les spectres uv et visible et du potentiel d'oxydation-réduction

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050009192A1 (en) * 2003-07-11 2005-01-13 Page Daniel V. Remote monitoring system for water
WO2009037699A2 (fr) * 2007-09-17 2009-03-26 Atlantium Technologies Ltd. Contrôle des processus d'oxydation dans des systèmes de traitement de liquide par lumière ultraviolette
WO2014025478A1 (fr) * 2012-08-10 2014-02-13 Xylem Water Solutions Zelienople Llc Procédé et appareil de surveillance et de régulation de l'ozonation et de la filtration aérée au moyen de mesures dans les spectres uv et visible et du potentiel d'oxydation-réduction

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109172846A (zh) * 2018-10-23 2019-01-11 广州达意隆包装机械股份有限公司 一种消毒系统及消毒控制方法
CN109172846B (zh) * 2018-10-23 2024-03-19 广州达意隆包装机械股份有限公司 一种消毒系统及消毒控制方法
CN112675346A (zh) * 2020-12-14 2021-04-20 青岛海尔空调器有限总公司 水洗空气装置的水箱消毒方法、装置、系统及介质
CN112675346B (zh) * 2020-12-14 2023-05-16 青岛海尔空调器有限总公司 水洗空气装置的水箱消毒方法、装置、系统及介质

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