Kinetics of the Decolorization of a Dye House Effluent by Providencia rettgeri ODO.
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Date
2013
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Publisher
International Journal of Environmental Sciences
Abstract
The potential of an organism isolated from a mixture of azo dyes to decolourize textile wastewater
was investigated. The organism identified by 16S rDNA as a strain of Providencia rettgeri was able
to remove 94 ± 0.56% of the colour in a dyehouse effluent within 24 h in batch experiments. P. rettgeri
strain ODO was able to use the effluent as sole carbon and nitrogen source. The optimum pH and
temperature for colour removal ranged between 7–8 and 30–35 °C, respectively. Analysis of the data
showed that the decolourization process exhibited first-order kinetics with respect to the colour
intensity and biomass concentration. The rate constant k=5.6 10 3 L/gDCMh at 37 °C. The
specific growth rate, μ, of the organism was 0.013 h 1 while the mean doubling time was 52.9 h. The
results indicated that P. rettgeri strain ODO has the potential for colour removal from textile effluent.
Description
Keywords
Dyehouse effluent, Decolourization, Providencia rettgeri, Decolourization kinetics