The average solar radiation intensity varied from 46 mW/cm2 to 75
mW/cm2 from 08:30 AM to 02:30 PM in the month of
July-August and from 8 mW/cm2 to 68 mW/cm2 from
08:30 AM to 02:30 PM in the month of January-February
in Oman for the year 2011-2012. A 5-litre sample of
wastewater was used for the experiments.