Full Description

The objective of this currently on-going Water Research Foundation-funded study is to developan innovative laser-induced fluorescence (LIF)-based method to measure real time, three dimensionalmixing behavior and hydrodynamics within ultraviolet (UV) reactors. Both pilot- and lab-scaleUV reactors equipped with low-pressure UV lamps were constructed for the LIF system.Conservative tracer tests were performed using the lab-scale reactor with UV lamps off, in which3D instantaneous distribution of fluorescent dye within the reactor was captured real time. Theimages were further analyzed to successfully visualize the structure of eddy in the UV reactorand quantitatively analyze dye distributions in UV reactors. Reactive tracer tests will beconducted using the lab-scale reactor in which tracer dye decayed in response to UV lights suchthat distribution of tracer dye within the reactor was quantitatively correlated with UV dosedistribution within the reactor. Further experiments using the lab-scale reactor are currentlybeing performed and experiments using a pilot-scale UV reactor will be performed. Preliminaryvalidation of this novel method by comparing the results to dose delivery measured usingbiodosimetry performed with Bacillus subtilis will also be performed. The newly developed LIFtechnique is expected to provide a highly innovative and unique approach for UV reactoroptimization and validation as well as greater insight into the performance of UV reactors. Includes 11 references, figures.

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Edition: Vol. - No. Published: 11/01/2009 Number of Pages: 7 File Size: 1 file , 1.1 MB