Bioaccumulation of the reactive textile dyes by candida tropicalis growing in molasses medium

摘要

Bioaccumulation of the reactive textile dyes,Remazol Blue,Reactive Black and Reactive Red,by the yeast species Candida tropicalis growing in molasses mdium was studied in a batch system as a function of initial pH and initial dye concentration.The optimum pH value for bioaccumulation was determined as 3.0 for all the dyes tested.The manimum specific bioacumulation capacity of C.tropicalis was 111.9 mg g~(-1) for Remazol Blue,101.9 mg g~(-1) for Reactive Black and 79.3mg g~(-1)for Reactive Red at approximately 700mg 1~(-1) initial dye concentration inhibited the growth the growth of yeast and caused a long lag period.Remazol Blue Blue dye gave a considerably higher dye bioaccumulation percentage by the yest among the dyes tested.