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Treatment Of Distillery Wastewater Using Catalytic Wet Air Oxidation

S. Suresh*, Ravi Shankar**, Shri Chand***

* Department of Chemical Engineering, Maulana Azad National Institute of Technology (MANIT) Bhopal, M.P., India.

**-*** Department of Chemical Engineering, Indian Institute of Technology Roorkee, India.

Periodicity:November - January'2011
DOI : https://doi.org/10.26634/jfet.6.2.1324

Abstract

In the present paper, treatment of typical high strength distillery wastewater (DWW) by catalytic wet-air oxidation (CWAO) at atmospheric pressure and 343-373 K. Experiments were conducted to investigate the effects of temperature (T) and catalyst dosage (m) on the chemical oxygen demand (COD) and colour removal. In this study, five catalysts were used namely, CuSO₄, ZnCl₂, FeCl₃, Al(OH)₃ and Cu (II)-exchanged NaY zeolite (SZ). The treatment efficiencies were 58.2%, 56.6%, 21.9%, 17.8% of the COD and 88.4%, 80.2%, 13.3%, 12.8% of colour for CuSO₄, ZnCl₂, FeCl₃, and Al(OH)₃ in 8h at 373 K and atmospheric pressure, respectively, where else, 13% and 13.3% removal efficiencies of COD, colour at same temperature and pressure, when SZ as a catalyst. The CuSO₄ catalyst was found to be best amongst all the catalysts for the treatment of DWW. The experimental data on the DWW exhibited two clearly distinct COD reduction phases: the first phase having fast rate followed by the second phase having slower rate. Both the phases of the CWAO were found to be first order reduction kinetics. The activation energy evaluated for CuSO4 was found to be 2.86 kcal/gmol for the first step and 3.65 kcal/gmol for the second step. The residue can be used as a fuel in the combustion furnaces and the ash obtained can be blended with organic manure and used in agriculture/horticulture.

Keywords

Distillery,Wastewater,Catalytic wet oxidation,COD,Colour.

How to Cite this Article?

Suresh, S., Shankar, R., and Chand, S. (2011). Treatment Of Distillery Wastewater Using Catalytic Wet Air Oxidation. i-manager’s Journal on Future Engineering and Technology, 6(2), 36-44. https://doi.org/10.26634/jfet.6.2.1324

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Treatment Of Distillery Wastewater Using Catalytic Wet Air Oxidation

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