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Biological decolourization of C.I. Direct Black 38 by E. gallinarum.

IR@NEERI: National Environment Engineering Research Institute

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Title Biological decolourization of C.I. Direct Black 38 by E. gallinarum.
 
Creator Bafana, Amit
Krishnamurthi, Kannan
Devi, Sivanesan Saravana
Chakrabarti, Tapan
 
Subject Environmental Biotechnology
Environmental Health
 
Description In the present study, an Enterococcus gallinarum strain was isolated from effluent treatment plant of a textile industry based on its ability to decolourize C.I. Direct Black 38 (DB38), a benzidine-based azo dye. Effects of dye concentration and medium composition on dye decolourization were studied. The strain was found to decolourize DB38 even under aerobic conditions. Kinetics of DB38 decolourization was also examined, and V(max) and K(s) of decolourization were found to be higher in Luria broth (12.8 mg l(-1)h(-1) and 490.6 mg l(-1)) than in minimal medium (4.09 mg l(-1)h(-1) and 161.84 mg l(-1)). However, decolourization rate/biomass was found to be higher in minimal medium than in Luria broth, indicating greater decolourization efficiency of biomass in the former. The study also revealed biodegradation of DB38 to benzidine and its further deamination to 4-aminobiphenyl (4-ABP) by the culture. Ammonia released during this process was used as nitrogen source for growth of the culture.
 
Publisher Elsevier
 
Date 2008-08-30
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/326/1/published.pdf
Bafana, Amit and Krishnamurthi, Kannan and Devi, Sivanesan Saravana and Chakrabarti, Tapan (2008) Biological decolourization of C.I. Direct Black 38 by E. gallinarum. Journal of hazardous materials, 157 (1). pp. 187-193. ISSN 0304-3894
 
Relation http://www.sciencedirect.com/science/article/pii/S0304389408000149
http://neeri.csircentral.net/326/