In this study C. vulgaris succeeded in decolorizing the WE during all the studied runs.
In this respect, Acuner and Dilek (2004) reported that several species of Chlorella were capable of degrading azo dyes to their aromatic amines and to further metabolize the aromatic amines to simpler organic compounds or CO2 and thereby detoxifying them.
Furthermore, El-Sheekh et al. (2009) reported the ability of C. vulgaris to decolorize a variety of azo dyes via algal azo dye reductase enzyme.