Vinay M. Bhandari
CSIR- National Chemical Laboratory, India
Title: Application of biocoagulants in dye wastewater treatment - Development of a new cavigulation methodology using cavitation and coagulation
Biography
Biography: Vinay M. Bhandari
Abstract
CaviGulation, a hybrid process by appropriately integrating cavitation and coagulation as a newer technology has been successfully explored for dye wastewater treatment. An eco-friendly approach has been developed by using biocoagulants such as Moringa oleifera, Cicer arietinum and Acanthocereus tetragonus (triangle cactus) and also using commercial inorganic coagulants e.g., PAC SAB 18 and Iron (III) chloride. Removal of Congo red dye was studied and effect of various parameters such as initial dye concentration (50 and 100 ppm), pH (3-7), coagulant dose etc., has been investigated in detail. CaviGulation (Acoustic cavitation/Sonication+Coagulation) shows increased reduction of 48%, 27%, 33%, 24% and 29% over individual coagulation using PAC SAB 18, Moringa oleifera, Acanthocereus tetragonus, Iron (III) chloride and Cicer arietinum respectively, while no reduction was observed with acoustic cavitation alone. The results also indicate that coagulant dose can be reduced by more than half by adjusting pH to 3. The results of this work conclusively indicate cavitation based technique using coagulants as a promising alternative for effective dye wastewater treatment. The use of bio-coagulant and the developed hybrid process can also find applications in industrial wastewater treatment, in general and can provide techno-economically feasible process for environmental pollution control.