If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email email@example.com
Dose delivery by an annular reactor equipped with either a low or medium-pressure mercury arc lamp and UV intensity sensor measurements are modeled. Plots of MS2 Reduction Equivalent Dose versus measured intensity are used to demonstrate two approaches towards monitoring dose delivery
by UV reactors. The first approach uses a UV intensity setpoint to guarantee dose delivery and the second uses a UV intensity setpoint with a UV transmittance setpoint. UV sensor placement, spectral response, and opening angle impact the relationship between delivered dose and measured intensity.
An optimal sensor location may be defined with each monitoring approach. With the intensity setpoint method, the optimal position occurs where delivered dose is proportional to measured UV intensity. This position depends strongly on the hydraulic efficiency of the reactor, and the spectral
response of the sensor for those reactors using polychromatic lamps. The optimal position varies slightly with sensor opening angle. The magnitude of the measured intensity varies strongly with opening angle and spectral response. With the UV intensity setpoint/UV transmittance setpoint
approach, the optimal UV intensity sensor position is relatively close to the lamp. The protocol used to validate UV reactors will vary depending on the approach used to monitor delivered UV dose.
Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.