Isolation and Process Optimization of Textile Dye Degrading Bacteria

In: Science

Submitted By gauravkguha
Words 6765
Pages 28
Title: Isolation and Process Optimization of textile dye degrading bacteria

Abstract:
Bacteria can remove dyes from wastewater and soil, leading to a decrease in their toxicity. The detoxification rate depends upon media and culture conditions. The decolourization/removal of textile dyes like bromophenol blue, methylene blue, methyl green, and malachite green, in addition to various other industrial dyes, using bacteria isolated from soil has been an important area of research for bioremediation and the present work is focused on this specific aspect. The effect of independent variables such as time, temperature, pH, and agitation on decolorization efficiency of bacteria has been optimized. Biodegradation of methylene blue and bromophenol blue was demonstrated by monitoring the effects of the different parameters and determining optimal conditions for degradation activity. Introduction
Several industrial activities, such as textile dyeing, olive oil extraction and the manufacture of pulp and paper are characterized by intensive water consumption rates. They release huge amounts of more or less coloured effluents into the environment. As far as synthetic dye release is concerned, textile dyeing facilities and the manufacture of dyestuffs are two major polluting sources. In addition, traditional textile dyeing processes generate a large amount of coloured effluents, because about 100 litres of water are required to process 1 kg of dyed fabrics. Moreover, up to 15% of applied dyestuffs are lost to the effluents due to dyeing process inefficiencies. Colour itself could be very pernicious to the receiving water courses not only for aesthetic reasons and toxicity towards many aquatic organisms, but also because coloured compounds reduce water transparency, which, in turn, affects photosynthetic activity, thus causing severe damage to the ecosystems. (Nermeen and…...

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