Decolorization of textile azo dyes by aerobic bacterial consortium |
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| Authors: | Bella Devassy Tony Dinesh Goyal Sunil Khanna |
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| Affiliation: | 1. Department of Biotechnology and Bioinformatics, NIIT Institute of Information Technology, Balaji Estate, Kalkaji, New Delhi 110019, India;2. Department of Biotechnology and Environmental Sciences, Thapar University, Patiala 147004, Punjab, India;1. Chemistry Department, Sanitary and Environmental Engineering Institute, Housing and Building National Research Center, Giza, Egypt;2. Environmental Engineering, Zewail City of Science and Technology, Egypt;3. Microbiology Department, Sanitary and Environmental Engineering Institute, Housing and Building National Research Center, Giza, Egypt;4. Sanitary Engineering Department, Faculty of Engineering, Alexandria University, 21544 Alexandria, Egypt;1. iBB ? Institute for Bioengineering and Biosciences, Department of Bioengineering, Instituto Superior Técnico, ULisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;2. Microbiology of Man-Made Environments Laboratory, iBET ? Instituto de Biologia Experimental e Tecnológica, Av. República, Qta. do Marquês, 2780-157 Oeiras, Portugal;3. ITQB ? Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Quinta do Marquês, 2780-157 Oeiras, Portugal;4. UCIBIO, REQUIMTE, Department of Chemistry, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal;1. School of Life Science, Liaoning Normal University, Dalian 116081, China;2. Laboratory of Aquatic Products Quality and Safety Inspection, Dalian City Fisherles Technical Extension Station, Dalian 116024, China;1. Department of Agricultural Microbiology, Agricultural College and Research Institute, Madurai 625 104, Tamil Nadu Agricultural University, Tamil Nadu, India;2. Department of Environmental Science, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, India;3. Department of Soils and Environment, Agricultural College and Research Institute, Madurai 625 104, Tamil Nadu Agricultural University, Tamil Nadu, India;4. Department of Chemistry, University College of Engineering, Nagercoil (Anna University Constituent College), Nagercoil, 629 004, Tamil Nadu, India;5. Deaprtment of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, India |
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| Abstract: | The decolorization potential of two bacterial consortia developed from a textile wastewater treatment plant showed that among the two mixed bacterial culture SKB-II was the most efficient in decolorizing individual as well as mixture of dyes. At 1.3 g L?1 starch supplementation in the basal medium by the end of 120 h decolorization of 80–96% of four out of the six individual azo dyes Congo red, Bordeaux, Ranocid Fast Blue and Blue BCC (10 mg L?1) was noted. The culture exhibited good potential ability in decolorizing 50–60% of all the dyes (Congo red, Bordeaux, Ranocid Fast Blue and Blue BCC) when present as a mixture at 10 mg L?1. The consortium SKB-II consisted of five different bacterial types identified by 16S rDNA sequence alignment as Bacillus vallismortis, Bacillus pumilus, Bacillus cereus, Bacillus subtilis and Bacillus megaterium which were further tested to decolorize dyes. The efficient ability of this developed consortium SKB-II to decolorize individual dyes and textile effluent using packed bed reactors is being carried out. |
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