Supported semiconductor photo catalysts operating under batch processes are gaining remarkable attention for the development of sustainable technological advancement in the field of effluent treatment remedies. For example, nanosized TiO2 particles supported on the clay or activated charcoal have been utilized for degradation of phenol in PET bottle reactor where 20 mg L−1 of phenol was found to be degraded under natural light [29]. Several attempts have been made for designing of reactors which include plug flow reactor, batch reactor, PET bottle as reactor and rotating disk photo catalytic reactor (RDPR) for the treatment of organic pollutants in water. A commercial TiO2- based catalyst in the form of composite ceramic balls is used as the immobilized photocatalyst on the rotating disk [30]. The inherent disadvantage of batch reactor is the separation of catalyst after the treatment which can be overcome through the degradation process under continuous stream of phenol in Continuous Stirred Tank Reactor (CSTR). This approach is beneficial in providing higher and active surface area of catalyst for treatment, lesser residence time with very negligible loss of catalyst as well as higher concentration drop of pollutant in the reactor.