Fifteen percent of the total world production of dyes is lost
during dyeing process and is released in the textile effluents.
The release of coloured wastewaters in the ecosystem is a dramatic
source of esthetic pollution, eutrophication, and perturbations
including decrease in the photosynthetic activity and
dissolved oxygen (DO) as well as alteration of the pH, increase
in the biochemical oxygen demand (BOD) and chemical oxygen
demand (COD),