Academic journal article Iranian Journal of Public Health

Optimization of Environmental Conditions of Azo B-Naphtol Orange Dye Decolorization by Halophilic Bacteria A3

Academic journal article Iranian Journal of Public Health

Optimization of Environmental Conditions of Azo B-Naphtol Orange Dye Decolorization by Halophilic Bacteria A3

Article excerpt

Background: The most common synthetic dyes which are used widely in textile, pharmaceutical and food industries are Azo dyes and because of Diazo links are considered as im- portant biologically contaminants. Normally these dyes are resistant against conventional methods of wastewater treat- ment. Since nowadays, use of microorganisms for removal of azo dyes has been considered in literature.

Methods: Investigation on the extent of decolorization was carried out using variation of factors in each trial of experi- ment while other factors were constant as follows. The first step was preparation of base media of decolorization and pH adjusted to 6. Therefore, 15ml of decolorization media was added to test tubes and then various concentrations of Azo dyes were added and after 12days of incubation time at 35°C, the optimum concentration of 40 ppm was obtained. At the second step, concentration and temperature were constant at 40 ppm and 35°C and pH was varied from 6 to 10 and the optimum pH=6 was obtained. Similarly, at the final step, concentration and pH were constant at 40 ppm and 6 and temperature was varied from 35°C to 40°C and the optimum temperature was obtained 38°C. …

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