In Industrial zones it is very difficult for small scale industries to treat strong wastewater in their premises hence come the concept of Common effluent treatment plant (CETP) in 20th century. On this note several number of CETPs in India is been treating industrial wastewater. The Conventional Treatment process existing in majority of Common Effluent Treatment plants in India are not capable of bringing the effluent parameters under required discharging norms. Hence there is an urgent requirement for tertiary treatment options for Common treatment processes in order to deal with the high strength of effluent loading. In this present book 17 different Physico-Chemical technologies including Oxidants and Filtration technologies are been studied on an extremely cocktail effluent of CETP at Vapi. Which comprises of wastewater from different industries like Textile, Chemical, Pharmaceutical, Pesticides, Paper & Pulp and Dyes& Colour.