Removal of COD, conductivity, chloride and total dissolved solids from textile wastewater using TiO2/UV system

Abstract

For the economic development of the country industries play very important role. Volume of wastewater is
increasing due to increase in urbanization and industrialization. Some of the industries causative to major water
pollution are textile mills, electroplating, paper and pulp industry and sugar mills etc., The major contaminants
generated from these industries are alkanes, halo alkanes, aromatic dyes, polymers, surfactants etc.,. So it is necessary
to treat wastewater as it contains toxic compounds. Chemical oxygen demand, color, total dissolved solids, suspended
solids, acidity and other non biodegradable substances which are the major pollutants from textile wastewater. So it is
necessary to treat textile wastewater before disposal to any streams. Some of the conventional treatment methods used
are coagulation/flocculation, membrane separation, adsorption etc. In the present study textile effluent was collected
from textile mill at banahatti, rabkavi talluk bagalkot (dist) and its initial characterization was done by measuring pH,
Electrical Conductivity, Total solids, TSS (Total Dissolved solids), TDS (Total Dissolved solids), Chloride, COD
(Chemical Oxygen Demand) and Color etc. Oxidation process of COD, conductivity, TDS, Turbidity and chloride
removal has been investigated in this work with respect to the effect of pH, adsorbent dosage, contact time and UV
light absorbance (oxidation process).Advanced Oxidation Processes (AOP´s) using TiO2/UV could be a good option to
treat and eliminate textile dyes. Advanced Oxidation Process are the one that offers a highly reactive, non-specific
oxidant namely hydroxyl radicals (OH), capable of destroying wide range of organic pollutants wastewater. After
treating the textile wastewater with TiO2/UV in oxidation process removal efficiencies of COD, TDS, Conductivity,
and chloride are 92.93%, 89.49%, 90.33% and 86.67% respectively.