Microbial Decolorization of Textile Effluent

Abstract

Textile industries can produce huge amount of waste during disposal and directly discharge into the environment. This study is aimed to screen and identify dye degrading bacteria. Experimentation was performed by collecting waste water and soil sample from textile dumping sites. Six bacterial strains were isolate by using NAM. The identified microorganisms were Staphylococcus aureus, Bacillus spp, Pseudomonas aeruginosa, Streptococcus spp, Bacillus spp, and Pseudomonas aeruginosa (S1, S2, S3, S4, S5 and S6) respectively. These isolates were inoculated in Nutrient Broth with five different dyes viz. Red (3BS), Orange (R.R), Yellow (3RS), Blue(R), and Turquoise (V.S.C). Decolorizing ability of dyes was observed by dye decolorization assay. Result showed that these isolates degrade almost all dyes, (S1) 50-80 %, (S2, S6) 61-84% to 5-84%, (S3, S5)75-87% to 71-86% and (S4)70-85%. Almost all dyes except turquoise were decolorized after 4 days of incubation. This approach is promising for detoxification of textile effluent.