Accelerated Biodegradation Of Azo Dyes By Bacteria

摘要: Faisalabad is known as a city of textiles not only in Pakistan but also all over the world. Several textile processing units are operation surrounding this city, which releasing huge quantities wastewater contaminated with variety xenobiotics.Particularly, substantial amount azo dyes released continuously into streams surroundings these units.The discharge contaminants considered potential threat to environments because their hazardous nature.Thus, study was undertaken isolate bacteria possessing high degrade from discharged by samples collected outlets number showed variation color intensity, pH and total soluble salts, implying that quality varies dyeing processes going on at time sampling. A 240 bacterial strains were isolated samples, after screening five most efficient selected for subsequent studies.Out strains, two N7 (Klebsiella oxytoca) N11 (Acinetobacter calcoaceticus) an excellent decolorize spiked liquid broth, individually well mixtures.These exhibited great belonging various dye groups (i.e.reactive, direct, disperse).The optimum conditions determined decolorization Reactive Black-5 7.0, temperature 35°C, static condition supplementation medium 0.4% yeast extract dye, 100 mg L-1.Since industrial carries investigated presence levels NaCl (5-60 g L-1).It recorded decolorized test up 100% low NaCl, (≥ 30 L-1) had negative impact rate dyes.Regression analysis revealed highly linear relationship between [V] salt concentration [NaCl].Then tested removal real units. Fortunately, effectiveness removing samples.The results studies clearly document have remove culture wastewater, could be used develop biotreatment strategy cleanup prior area.