Faisalabad is known as a city of textile not only in Pakistan but
also all over the world. Several textile processing units are in
operation in the surroundings of the city, which are releasing a
substantial amount of azo dyes into the wastewater streams in the
surroundings of these textile units.The discharge of these
contaminants is considered to be a potential threat to the
environment because of their hazardous nature. Thus, this study was
undertaken to isolate the bacteria possessing high potential to
degrade azo dyes from the wastewater discharged by the textile
units. A total of 150 bacterial strains were isolated from these
wastewater samples using minimal salt medium spiked with Reactive
Blue ZBLN azo dye. Results revealed that some bacterial strains
were able to decolorize 8 different dyes almost within 6 hours.
Thus, the isolated bacterial strains have the potential to remove a
variety of dyes from the liquid culture, which could be used to
develop a biotreatment strategy for cleanup of the industrial
wastewater prior to their discharge into wastewater streams of the
surrounding area.
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