Product category:
Filters and Centrifuges
News Release from: Hanovia | Subject: UV Transmittance Measurement System
Edited by the Processingtalk Editorial
Team on 16 April 2004
Monitor maintains water treatment
consistency
UV disinfection specialist Hanovia has introduced a new control option that makes UV water treatment systems deliver an optimum dose of UV light even when feedwater quality fluctuates
UV disinfection specialist Hanovia has introduced a new control option that makes UV water treatment systems deliver an optimum dose of UV light even when feedwater quality fluctuates This will add an extra level of process validation in critical water treatment applications such as ultra-pure process water and drinking water
This article was originally published on Processingtalk on 24 Feb 2003 at 8.00am (UK)
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Micro-organisms and organic contaminants need to be exposed to a specific intensity of UV light, for a given time, to ensure they are deactivated or reduced to harmless constituents.
However, changes in feedwater UV transmittance can affect UV dose and reduce the effectiveness of the disinfection or organics destruction process.
To eliminate this process variable, Hanovia has developed and patented a UV Transmittance Measurement System.
The device continuously measures water transmittance and feeds data to a control unit.
This enables the intensity of UV emitted by lamps in the disinfection chambers to be increased or decreased in response to changes in water quality.
In this way, feedwater is irradiated with the optimum UV dose, regardless of its UV transmittance.
An additional benefit is energy saving, since the new system will prevent unnecessary overdosing with UV.
The new on-line monitor continuously measures UV transmittance of a feedwater flow fed to a 10mm or 40mm cell within a stainless steel chamber.
Three validated UV monitors measure UVC light emitted by a single lamp at the crucial 254nm bactericidal wavelength.
The system controller averages the signals from the monitors, displays the transmittance value and relays the data to the Photon control unit, which automatically adjusts UV output.
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