Organic pollutants which are present in industrial wastewater discharge are recalcitrant in nature and are not easily degradable by conventional aerobic microbial treatment. For the effective degradation of such pollutants advanced oxidation processes are used. . In recent years, two AOPs, viz. photocatalysis (using semiconductor oxides such as TiO2) and sonolysis, which is ultrasound irradiation of aqueous pollutant solution, have been extensively investigated. Simultaneous application of these two techniques, known as Sonophotocatalysis, has been found to give enhanced degradation than any of these techniques applied individually.