Distillery Waste Water Treatment using Photo-catalytic UV-TiO2 System

Abstract

In this study, removal of chemical oxygen demand COD, total suspended solids TSS, total dissolved solids TDS and colour of
distillery wastewater using photo-catalytic process with TiO2 was carried out. Wastewater treatment from anaerobic sedimentation tank, COD: 4476 mg/L, TSS: 640 mg/L, total dissolved solids TDS: 720 mg/L was used for the photocatalytic
process. The effectiveness of heterogeneous photocatalytic degradation on distillery wastewater using the UV-TiO2 process was
investigated in a laboratory scale. For the photocatalytic process, the effect of the catalyst was studied using various amounts of
TiO2 (0.1 to 0.5 g/L). Also, the effect of contact time (30 to 180 min) with the different UV power (10 to 30 W) was studied. For
0.1 g/L TiO2 dosage, COD removal 94% with minimum contact time 110 min in 20 W UV power. For 0.2 g/L TiO2 dosage, COD
removal 94% with minimum contact time 110 min in 20 W UV power. For 0.3 g/L TiO2 dosage, COD removal 95% with minimum contact time 100 min in 30 W UV power. For 0.4 g/L TiO2 dosage,COD removal 95% with minimum contact time 80 min in 20 W
UV power. For 0.5 g/L TiO2 dosage, COD removal 95%L with minimum contact time 80 min in 30 W UV power. By the usage of
TiO2 dosage (0.1 to 0.5) g/L, the COD values of treated water effluents were reduced to standard emission guideline 250 mg/L. In
the use of the energy usage, the condition with UV power 20 W with TiO2 dosage at the contact time of 110 min was the optimum.
In the use of processing time, the condition with UV power 30 W with the 0.4 g/L of TiO2 dosage at the contact time of 80 min was
the optimum.