Treatment of Tannery Wastewater by Various Oxidation and Combined Processes

Document Type : Original Research Paper

Authors

Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee-247 667, Uttarakhand, India

Abstract

A general overview on the prospective of various oxidation and combined processes
in the treatment of tannery industry effluent are reported. Various oxidation and combined processes
such as UV/H2O2/Hypochlorites, Fenton and Electro-oxidation, photo-chemical, photo-catalytic,
electro-catalytic oxidation, wet air oxidation, ozonation, biological followed by ozone/UV/ H2O2,
coagulation or electro-coagulation and catalytic treatments have been considered. The tannery
wastewater with sulphide as main sources of pollutant, electro-coagulation is the best removal
efficiency process among the other oxidation processes, whereas for chromium, photo catalytic
oxidation process using nano-TiO2 and wet air oxidation in the presence of manganese sulphate and
activated carbon as a catalyst are more efficiency processes. The integrated combined processes
described permit to meet disposal limits, health quality standards and the recovery of several chemicals
utilized in the tanneries.

Keywords

International Journal of Environmental Research
Volume 5, Issue 2
April 2011
Pages 349-360

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