Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 11, Issue 3, 2009; Page No.(559-561 )

BACTERIAL DEGRADATION OF TANNERY EFFLUENT

D. RAMAKRISHNAN, VENKATRAMALINGAM K AND J. RONALD AND S. SHANMUGAVEL

Abstract

Aerobic process is very effective for the degradation of highly toxic tannery effluent. Five bacterial species, Bacillus coagulans, Bacillus badius, Bacillus alvei, Bacillus stearothermophilus and Citrobacter diversus were isolated from the degraded sludge of tannery effluents. The bacterial consortium changed the physicochemical properties of tannery effulent and decoulourization upto 55% was observed. The results also showed reduction in BOD, COD, TSS, chloride, sulphide, sulphate, phenolic compound, chromium and other heavy metals; where as, dissolved oxygen was increased up to three fold.

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