Reuse of textile effluent for dyeing using combined technology of ceramic microfiltration and surface treated sugarcane bagasse: toxicity evaluation usingChanna punctatusas model

Abstract

AbstractAn attempt was undertaken for treatment and reuse of highly concentrated textile dyebath effluent. Ceramic microfiltration membrane prepared from a cost effective composition of alumina and clay was used in combination with a biosorbent prepared from sugarcane bagasse. The combined process was highly effective for removal of chemical oxygen demand (COD), turbidity, colour and total suspended solids. For the concentrated dyebath effluent with initial COD value of 2220 mg/L, COD reduction was about 91%. Dye removal was about 99%, turbidity removal was > 99% and TSS reduction was > 90%. The treated samples were utilized in the dyeing process of cotton fabric under different conditions. The reusability study showed high potential with respect to water reclamation, as well as, reduction of the associated chemicals consumption. Dye uptake using membrane treated water was more compared to that of freshwater in case of light and medium shade dyeing. Toxicity effect of treated and untreated effluent on env...