School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece; Department of Microbiology, University of Port Harcourt, Port Harcourt, Nigeria
Ogugbue, C.J., School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece, Department of Microbiology, University of Port Harcourt, Port Harcourt, Nigeria; Sawidis, T., School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece; Oranusi, N.A., Department of Microbiology, University of Port Harcourt, Port Harcourt, Nigeria
Studies were carried out to evaluate the colour removal capacity of a moderately halotolerant bacterium, Bacillus firmus, in synthetic saline wastewater medium (SSWM) under static condition. The bacterial strain effectively decolourized Polar red B (an azo dye) in a wide range of sodium chloride (1-6%, w/v), dye (5-100. mg/L) and SDS (0.1-5.0. mg/L) concentrations and at pH range of 6-10 after 24. h of incubation. Cell immobilization studies indicated that colour removal was significantly higher (p<0.05) in immobilized halotolerant cell systems than with free cells of B. firmus especially at salt concentrations higher than 4%. Results suggest the potential of using the immobilized halotolerant cell system for effective treatment of dye-contaminated saline wastewaters. © 2011 Elsevier B.V.
Bacterial strains; Cell system; Free cells; Halotolerance; Halotolerant; Halotolerant bacteria; pH range; Saline wastewater; Salt concentration; Static conditions; Azo dyes; Bacilli; Bacteriology; Biodegradation; Color; Sodium chloride; Stripping (dyes); Wastewater; Wastewater treatment; Cell immobilization; bacterium; biodegradation; color; dye; immobilization; pollutant removal; salinity tolerance; sodium chloride; waste treatment; wastewater; water pollution; water treatment; Bacillus (bacterium); Bacillus firmus; Bacteria (microorganisms)
