Decolorization and partial mineralization of a polyazo dye by Bacillus firmus immobilized within tubular polymeric gel.

3 Biotech
Chimezie Jason OgugbueNathaniel A Oranusi

Abstract

The degradation of C.I. Direct red 80, a polyazo dye, was investigated using Bacillus firmus immobilized by entrapment in tubular polymeric gel. This bacterial strain was able to completely decolorize 50 mg/L of C.I. Direct red 80 under anoxic conditions within 12 h and also degrade the reaction intermediates (aromatic amines) during the subsequent 12 h under aerobic conditions. The tubular gel harboring the immobilized cells consisted of anoxic and aerobic regions integrated in a single unit which was ideal for azo dye degradation studies. Results obtained show that effective dye decolorization (97.8%), chemical oxygen demand (COD) reduction (91.7%) and total aromatic amines removal were obtained in 15 h with the immobilized bacterial cell system whereas for the free cells, a hydraulic residence time of 24 h was required for an equivalent performance in a sequential anoxic and aerobic process. Repeated-batch experiments indicate the immobilized cells could decolorize C.I. Direct red 80 and reduce medium COD in five successive batch runs with enhanced activity obtained after each consecutive run, thus suggesting its stability and potential for repeated use in wastewater treatment. UV-visible spectrophotometry and HPLC analysis ...Continue Reading

References

Nov 1, 1996·Applied and Environmental Microbiology·H Uemoto, H Saiki
May 7, 2002·Bioresource Technology·B Manu, Sanjeev Chaudhari
Sep 13, 2002·Applied Microbiology and Biotechnology·H ClausH König
Jan 14, 2003·Journal of Biotechnology·Anna GottliebStephen Forsythe
Sep 27, 2003·Water Research·L GianfredaJ M Bollag
Oct 4, 2003·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Mustafa Işik, Delia Teresa Sponza
Jun 16, 2004·Environment International·Esther ForgacsGyula Oros
May 10, 2005·Water Research·Frank P van der Zee, Santiago Villaverde
Oct 10, 2006·Mutation Research·Rodrigo Otávio Alves de LimaGisela de Aragão Umbuzeiro
Nov 8, 2008·Microbial Ecology·Carlos Renato Corso, Ana Carolina Maganha de Almeida
Jan 23, 2009·Journal of Hazardous Materials·R G SarataleS P Govindwar
Feb 13, 2009·Biotechnology Advances·Susana Rodríguez Couto
Jan 29, 2010·Journal of Hazardous Materials·Zeynep Eren, Nilsun H Ince

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Citations

Nov 23, 2019·Preparative Biochemistry & Biotechnology·Koushik PandeyK V Bhaskara Rao
Nov 10, 2020·Frontiers in Bioengineering and Biotechnology·Pankaj Kumar Arora

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Methods Mentioned

BETA
chemical treatment
membrane filtration

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