Electrochemical Treatment of Textile Waste Water with Shielded Platinised Titanium under UV Light
The electrochemical oxidation process of textile waste water under ultra violet (UV) light is a promising treatment technique for substances which are resistant to biodegradation. Textile waste water is characterized by extremely high biochemical oxygen demand (BOD5), chemical oxygen demand (COD), total organic carbon (TOC) and strong color. In a laboratory scale electrochemical cell, shielded platinised titanium (Pt/Ti), stainless steel (SS 304) and sodium chloride were used as anode, cathode and electrolyte respectively. The electrochemical treatment was carried out under UV light. Simulated textile waste water from 10 reactive dyes, which are widely used in cotton dyeing industries, was used in this experiment. Due to the strong oxidizing potential of the chemicals produced (oxygen, hydroxyl radicals and other oxidants) the BOD5, COD, TOC and color of the wastewaters were substantially decreased. The process is based on electrolytic and photo degradation of dyestuffs and the parameters affecting the procedure such as the quantity of the electrolyte, the pH and applied potential were researched and discussed. Temperature, current and pH were measured on line. The efficiency of the anode of the electrode was examined during the electrolytic oxidation. Color removal was evaluated by UV-vis spectrophotometer and up to 90% color removal was achieved after 30 min of treatment with the addition of 5g/L NaCl and 20V applied potential.
"This article was originally presented at the 88th Textile Institute World Conference Shah Alam, Selangor, Malaysia, May, 2012".
About the Authors:
Mohammad Kamruzzaman, Rolf-Dieter Hund & Chokri Cherif are associated with the Faculty of Mechanical Engineering at the Institute of Textile Machinery and High Performance Material Technology, Dresden University of Technology, Germany.