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- W1500156901 abstract "Backgrounds and Objectives: Reactive dyestuff has potential of toxicity, carcinogenesis and mutagenesis for mammals and aquatic organisms. The current physical and chemical methods such as adsorption, coagulation, precipitation, filtration and … can been used for removing of dyestuff. Biological treatment which is effective and economic for decontamination of dyestuff wastewaters waspreferredbecauseoflimitationanddifficultyofphysicochemicalmethods.Inordertoinvestigate the trend of pollution reduction of color compounds, ability of Remazol Black-B dyestuff removal from aqueous medium by bacterial consortium under anoxic conditions was studied. Materials and Methods: The mix culture of bacteria from textile industries activated sludge was enriched in luria broth medium containing RB-B dyestuff as a carbon source. Then biodegradation was assessed in 4 batch reactors. Microbial population of bacterial and decolorization quantities of samples were detected by MPN and UV-Vis spectrophotometer. Results: Decolorization efficiency by the bacterial consortium was obtained more than 99% for 50 and 250 mg/L concentrations in 72 and 144 h (3 and 6 days) respectively, while for the initial concentration of 500 mg/Lwas 98.1in 240 h (10 days) of biodegradation period. Dyestuff reduction rateaftercompletedremovalwasabout0.69,1.74,2mg/L/hforinitialconcentrationof50,250,500 mg/Lrespectively. Conclusion: Results showed that Alcaligenes denitrificans and Alcaligenes xylosoxidans bacteria which were isolated from activated sludge have good potential of RB-B dyestuff removal and this removal is depending on primary concentration of dye. Removal efficiency increased as primary concentration went up." @default.
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- W1500156901 date "2011-01-10" @default.
- W1500156901 modified "2023-09-22" @default.
- W1500156901 title "Survey of Ability of Activated Sludge Isolated Bacteria in Removal of RB-B Dyestuff from Aqueous Medium" @default.
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