Purification of Tannery Effluent by electrolytic corrosion of aluminium
Mathieson, G.A., Langdon, A. & Jamieson, G. (2006). Purification of Tannery Effluent by electrolytic corrosion of aluminium. ECS Transactions, 1 (4), 93-102.
Permanent Research Commons link: https://hdl.handle.net/10289/6549
Tannery Effluent is noxious because tanning process chemicals are preservatives, including chromium, and the pH is high. Electrolytic processing is feasible because the high salt content gives a high electrical conductivity. While research on the subject dates back to early in the 20th Century, commercialization has not occurred, perhaps due to excessive power consumption. Other researchers have produced promising results with rendering plant effluent (Tetrault 2003). During 2005 a specialised proprietary prototype with a novel anode design was trialed extensively at a Tannery site in New Zealand and produced good results during continuous inline operation despite wide variation in the inflow. Greater than 90% removal of chromium from solution with similar reductions in turbidity were achieved at lower operating cost, residual aluminum and total aluminum addition than by dosing with usual commercial aluminum based flocculants. Results from the field trials are shown and discussed.
This article has been published in the journal: ECS Transactions. © 2006 ECS - The Electrochemical Society.