Extensive investigation on operating parameters
has been carried out with these lab or pilot scale systems. A
recent critical review outlines the effects of water quality and
a wide range of operating parameters including TiO2 loading,
pH, temperature, dissolved oxygen, contaminant type and
concentration, light wavelength and intensity
Readers are referred to this review for details
regarding process optimization. A commercial product,
Purifics Photo-Cat system, has treatment capacity as high as
2 million gallon per day with a small footprint of 678 ft2. Pilot
tests showed that the Photo-Cat system is highly efficient for
removing organics without producing waste streams and it
operates with relatively low specific power consumption of
about 4 kWh/m3 Nano-TiO2 facilitated solar disinfection
(SODIS) has been extensively tested and appears to be a
feasible option to produce safe drinking water in remote areas
of developing countries. The SODIS system can be small scale
for one person or scaled up to medium size solar compound
parabolic collectors.