The objective of this currently on-going Water Research Foundation-funded study is to develop
an innovative laser-induced fluorescence (LIF)-based method to measure real time, three dimensional
mixing behavior and hydrodynamics within ultraviolet (UV) reactors. Both pilot- and lab-scale
UV 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 which
3D instantaneous distribution of fluorescent dye within the reactor was captured real time. The
images were further analyzed to successfully visualize the structure of eddy in the UV reactor
and quantitatively analyze dye distributions in UV reactors. Reactive tracer tests will be
conducted using the lab-scale reactor in which tracer dye decayed in response to UV lights such
that distribution of tracer dye within the reactor was quantitatively correlated with UV dose
distribution within the reactor. Further experiments using the lab-scale reactor are currently
being performed and experiments using a pilot-scale UV reactor will be performed. Preliminary
validation of this novel method by comparing the results to dose delivery measured using
biodosimetry performed with Bacillus subtilis will also be performed. The newly developed LIF
technique is expected to provide a highly innovative and unique approach for UV reactor
optimization and validation as well as greater insight into the performance of UV reactors. Includes 11 references, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.1 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 7 |
| Published : | 11/01/2009 |
