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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Apr Supplement 2007, 28 (2)                                                                                                             Back


Isolation and characterization of chromate resistant bacteria from tannery effluent

O. P. Shukla, U. N. Rai*, N. K. Singh, Smita Dubey and V. S. Baghel

Ecotoxicology and Bioremediation Group, National Botanical Research Institute,

Rana Pratap Marg, Lucknow-226 001, India

(Received: June 29, 2005 ; Revised received: September 20, 2005 ; Accepted: October 18, 2005)

Abstract: The tannery effluent emanating from Common Effluent Treatment Plant (CETP), Unnao (U.P., India) was found toxic in nature, having high BOD, COD, TDS and Cr content (5.88 mg l-1), which supported growth of chromate tolerant bacteria. Several chromate tolerant bacteria have been isolated from these effluent and maximum tolerant four strains (NBRIP-1, NBRIP-2, NBRIP-3 and NBRIP-4) were characterized in this study. These strains showed multiple metal and antibiotic resistances. Growth of these strains was reduced at higher Cr concentration with extention of lag phase. Chromium accumlulation by these isolates may have a great potential in recovery and detoxification of Cr from tannery effluent.

Key words: Growth behaviour, Chromium, Bacterial isolates, Tannery effluent, Antibiotic, Bioremediation


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