A variety of azo dyes can be found in a textile industry effluent, many of which are recalcitrant and resistant to biodegradation. A novel consortium plant (Fimbristylis dichotoma) and Baker’s yeast (Saccharomyces cerevisiae) is used to decolourize a textile azo dye Congo red and real textile effluent. It shows enhancement in decolourisation as compared to the individual plant and to yeast with fabulous rate of efficiency of decolourisation of 95% for Congo red and 65% for real textile effluent. Amended decolorization of Congo red and real textile effluent was seen due to the snowballing effect of various oxidative as well as reductive enzymes of consortium FD-SC. Improved biodegradation of Congo red by the FD-SC consortium was observed in the spectroscopic analysis in comparison of plant and yeast individually could perform. Step by step observation of biodegradation of dye was confirmed with the help of HPTLC, HPLC, FTIR and GC-MS techniques. Toxicity assessment of the metabolites formed after degradation of dye was performed with the help of effect of metabolites on the germination of seeds in compare with actual dye solution and % germination was calculated followed by fish toxicity assessment. Gradual decolourization of the dye was observed in the sections of root cortex of Fimbristylis dichotoma. Along with significant reduction in BOD, COD, ADMI, TSS, TDS and pH values and positive growing effect on plantlets was observed with normal structure restoration in fish gills.

Effective strategy for the treatment of real textile effluent by using a novel triple consortium and its toxicological assessment

ACS Spring 2022

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