Volume : IV, Issue : VI, June - 2014

Bacterial Treatment For Removal of Chromium (Vi) Containing Electroplating Waste Waters

Pooja Hirpara, Bhatt Nikhil, D. Srinivas Murty

Abstract :

A bacterial isolate (HN03) with high Cr(VI)–removinging capacity was isolated from Cr(VI)–contaminated soil and identified as Serratia rubidaea. The isolate was a Gram–positive, aerobic rod. The hexavalent chromiumremovinging capability of the isolate was investigated under 1, 5 Diphenyl carbazide (DPC) method, Atomic absorption spectrophotometer (AAS), UV–Visible scanning spectroscopy, Inductively coupled plasma – optical emission spectrometer (ICP–OES) and phytotoxicity study. Under these conditions, the isolate tolerated chromium concentrations up to 1,200 mg/l. The strain reduced Cr(VI) over a wide range of pH (6.5–10.0) and temperatures (30–37°C) with optimum performance at pH 8.5 and 35 °C. The various other parameters such as agitation speed (80– 200) and various carbon source with optimised conditions 150 rpm agitation speed and sucrose as carbon source were studied one at a time the experiments were conducted in 250 mL Erlenmeyer flask containing 100 mL LB oth medium. This is the novel report of a bacterial growth and Cr(VI)–removal process under aerobic growth conditions. Further Laboratory scale model microaerophilic, down flow type, batch fixed film bioreactor (BRF) was operated. The study suggested that the isolate possesses a distinct capability for Cr(VI) removal which could be harnessed for the detoxification of chromium contaminated wastewaters.

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Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

Pooja Hirpara, Bhatt Nikhil, D. Srinivas Murty Bacterial Treatment For Removal of Chromium (Vi) Containing Electroplating Waste Waters Indian Journal of Applied Research, Vol.IV, Issue.VI June 2014

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