Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper


Vol 15, Issue 3, 2013

Page Number: 531-538

ISOLATION, SCREENING AND IDENTIFICATION OF DYE DECOLORIZING BACTERIA FROM TEXTILE EFFLUENT TREATMENT PLANT OF ANKLESHWAR, GUJARAT

MAULIN P. SHAH, KAVITA A. PATEL, SUNU S. NAIR AND A.M. DARJI

Abstract

Textile effluent and sludge produced by effluent treatment plant is rich source of dye decolorizing bacterial population. Total 39 isolates were selected on the basis of their Gram reaction, colony characteristics, and cell morphology. Samples contain both the types of organisms, Gm +ve and Gm –ve with dominated Gm +ve species. Initially, all 39 isolates were tested for their ability to decolorize two azo dyes, Reactive Black 5 and Green B. Then, six potential isolates were selected on the basis of their dye decolorizing ability and further tested with FF sky Blue, Black E, Black BT and Reactive Orange M2R. Differences in structures and complexity of the dye led to variable percentage of decolorization of different dyes by the same organism.