Testing of Bacterial Population Isolated from Tannery effluent and its Chromium reduction efficiency

Author(s): Nilofer Nisha H.M* and Kavitha P

Abstract: The present study reveals isolation, identification and characterization of chromium heavy metal resistant bacteria from tannery effluent collected in and around Tiruchirappalli. Initially, a total of 11 distinct isolates were screened from three different tannery effluent samples. Based on morphologicaland biochemical analysis revealed that, the isolates were authentically identified. The six isolates were selected based on the level of heavy metal resistances and among the four isolates respectively, Pseudomonas fluorescens, Bacillus subtilis, Pseudomonas putida and Bacillus licheniformis were found to be tolerate 1000 ppm Cr. Isolate designated as SII3 belongs to Pseudomonas putida showed maximum absorption of chromium (70%) and the chromium reductase assay was 1.18 units. The results on pH and nitrogen indicate that medium with peptone and yeast extract with pH 5-7 given significant growth and absorption of chromium under static condition.

PAGES: 1403-1408  |  192 VIEWS  379 DOWNLOADS