Biosorption of copper from wastewater by Bacillus subtilis in a packed bed bioreactor
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2012, Vol 2, Issue 11
Abstract
The potential for copper (Cu2+) reduction in a fixed-film bioreactor system was investigated using a copper reducing bacterial species Bacillus subtilis. This work on the process of biosorption of copper from wastewater in a continuous-flow, fixed packed-bed bioreactor was conducted in a search for solution to the environmental problem caused by heavy metals. The Cu2+ bearing solution with initial concentration in the range of 50 - 150 mg/L was continuously pumped downward into the column. The Cu2+ loading rates were ranged from 180 to 900 ml/h. Analysis of the results demonstrated that the biosorbent had an extraordinary capacity for biosorption of copper (II) studied at about 4.5 pH of the effluent, with a removal percentage of 71.2% and 63.2% for the two immobilization methods used. Agar immobilized Bacillus subtilis biomass was found to be more efficient than polyacrylamide immobilized biomass in the packed bed bioreactor.
Authors and Affiliations
Korrapati Narasimhulu, Y. Pydi Setty
Keywords
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