The simultaneous removal of chromium and other organic pollutants from tannery wastewater was investigated in a batch electrochemical membrane reactor. This reactor, having a total capacity of 1 liter, was separated into two compartments (anodic and cathodic compartments) by using an anionic membrane. A stainless steel sheet with the square holes having total surface area of 0.0215 m2 and a Ti/RuO2 grid was used as the cathode and anode, respectively. The results indicated that the optimum condition for removal of chromium from tannery wastewater was found at the current density of 60.5 A/m2 at initial pH of 4.5. At this condition, more than 98% of chromium was removed within 60 min. Some organic pollutants contained in wastewater such as oil and grease, color and the level of biochemical oxygen demand (BOD), chemical oxygen demand (COD) and total kjeldahl nitrogen (TKN) were also markedly reduced.
APHA, AWWA and WEF. Standard Methods for the Examination of Water and Wastewater. 20th ed. Part 3111 B, 1998
Hunsom M, Pruksathorna K, Damronglerd S, Vergnes H, Duverneui P, Water Res., 39, 610, 2005
Rajkumar D, Palanivelu K, J. Hazard. Mater., 113(1-3), 123, 2004
Hunsom M, A Dissertation of Doctor of Philosophy in Chemical Technology, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand, 2001
Roberts EPL, Hao YE, Eager S, Proceedings of the 6th World Congress of Chemical Engineering Melbourne, Australia, 2001