Solar assisted photo degradation of wastewater by compound parabolic collectors: Review of design and operational parameters

The use of solar radiation in wastewater treatment is a shift of artificial ultraviolet light to renewable and sustainable solar source. Various types of concentrating and non-concentrating solar reactors have been used in wastewater treatment applications. This study reviews the application, design and operational parameters of compound parabolic collector (CPC) for wastewater treatment. It is the most promising type of non-concentrating collectors which is better than concentrating collector. Details of CPC design parameters like reflective surface, absorbing tube material, absorbing tube diameter, and acceptance angle have been elaborated. Core operational parameters like photo catalyst types and their optimum concentration, pH and light intensity have also been undertaken. Application of CPC in wastewater treatment and water disinfection has been explained in the final part of the paper.