Decolourization and detoxification of textile organic effluents by Alcaligenes sp. and application of medicinal plants to investigate acute toxicity of degraded intermediate products
MS Shinkafi, IU Mohammed, AS Hassan, AA Audu
The remediation of dye contaminatedrnenvironment was evaluated using indigenous bacterial strains isolated fromrnwastewaters from an effluent treatment plant of a Textile Industry in Kano,rnNigeria. The isolates were identified using 16S rRNA gene sequence analysis as Alcaligenes sp. APO4 and some of the isolates were mutated using UV-irradiationrninducement. Both the wild and mutant types of the bacterial strains werernseparately cultured in thirteen (13) different reaction flasks containing thernsame concentration of organic effluent. Decolorization efficiencies of thernbacteria was measured as a function of the operational parameters (aeration,rndye concentration, pH, temperature, total viable count) and the optimalrnoperational conditions obtained for decolorization of the dyes were: pH 6.5 -8.0rnat 37 oC. The mutant strains exhibited higher potential torndecolorize and detoxify the dyes effluent up to 92.6% and 83.9% respectivelyrnafter 24 days of incubation under aerobic condition. This study offers valuablerninferences to the practical application of Alcaligenesrnsp. for the treatment of otherrnsources of organic pollutants.