Improved Method for Real-Time Fluence Monitoring in UV Reactors
Publication: Journal of Environmental Engineering
Volume 141, Issue 4
Abstract
Based on previously developed monitoring system comprising three microfluorescent silica detectors, this paper proposed an improved real-time fluence monitoring method for running ultraviolet (UV) reactors. Adoption of this new method would significantly decrease the number of biodosimetry tests while increase the monitoring accuracy. The method constants were first determined by biodosimetry; thereafter, a long-term (about 16 months) experiment was conducted to evaluate the continuous performance of the proposed method under simulated practical conditions. The results indicate that the daily average fluence dropped gradually from 248 to over the whole operational period, which arose principally from the lamp output attenuation and serious sleeve fouling. Furthermore, the real-time monitoring data of 1 representative week were analyzed, which could provide useful instructions for the operation and maintenance of UV facilities. This paper demonstrates that the proposed method could monitor well the real-time fluence with a low cost but a high accuracy.
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Acknowledgments
The research reported in this paper was financially supported by the National Natural Science Foundation of China (51221892), the Ministry of Science and Technology of China (2012AA062606, 2012BAJ25B04), and the State Key Laboratory of Environmental Aquatic Chemistry (12K01ESPCR).
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Published In
Journal of Environmental Engineering
Volume 141 • Issue 4 • April 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Mar 25, 2014
Accepted: Sep 11, 2014
Published online: Oct 6, 2014
Discussion open until: Mar 6, 2015
Published in print: Apr 1, 2015
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