Water Purification Technology

In a typical ultraviolet (UV) disinfection system, water passes through a reactor vessel, where one or more UV lamp(s) irradiate the flowing water. Generally, the distribution of the UV dose is non-uniform within the reactor, with UV dosage decreasing as distance from the lamp(s) increases. The EET UV Water Purification System is designed so that all of the water receives sufficient UV dosage to achieve the desired effect on microorganisms.

The Rev-Flo System

The REV-FLO unit is configured such that both forward and reverse fluid flow is exposed to UV radiation, which effectively doubles the exposure to the UV lamps compared to commercially-available units. In addition, since the exiting flow passes through a high intensity region of the unit, low UVT waters are treated effectively, a feature that may make the REV-FLO design a niche application for the pharmaceutical industry. The expected nominal design flow range for initial applications of the REV-FLO system is 10 to 15 gallons per minute (gpm). The unit is scalable.


REV-FLO Features:

  • REV-FLO uses 20.5% less energy
  • Disinfects more effectively at lower UVT
  • Easy installation
  • Low maintenance
  • Scalable

HydroQual Engineers and Scientists, Inc. (HydroQual) conducted side-by-side testing of the REV-FLO unit and a comparable commercially-available unit at the UV Validation and Research Center of New York (Johnstown, New York). The objectives of testing were to compare the dose delivery (measured as reduction equivalent dose (RED) using MS2 coliphage biodosimetry) and “wall” power consumption (normalized to dose and flow) of the units.


UNIT FLOW (gpm) UVT (%) Power (W) RED (mJ/cm2)
REV-FLO 12.26 67.8 41.4 33.8
Commercial 12.34 68.1 52 27.9
REV-FLO 12.28 84.8 41.4 38.6
Commercial 12.53 84.6 52.1 39.7