Application of methods for wastewaters consisting synthetic dyes

Abstract

Wastewaters from industries which produce or use colours present a significant ecological problem due to their intensive colouration and consistence of recalcitrant organic compounds. Those wastewaters can not be discharged into the environment without prior adequate treatment. Application of processes for removal of dyes from effluents is based mostly on physiochemical methods. Such methods are effective only if the effluent volume is small, often very costly and, although the dyes are removed, accumulation of concentrated toxic sludge creates a significant secondary disposal problem. There is a need to find low cost and environmentally friendly alternative treatment processes that are effective in removing dyes from large volumes of industrial effluents such as biological systems.