Evaluation of the Combined Cr(VI) Removal Capacity of Sawdust and Sawdust-Immobilized Acinetobacter haemolyticus Supplied with Brown Sugar

Ahmad, Wan Azlina; Zakaria, Zainul Akmar; Razali, Firdausi; Samin, Jefri

Evaluation of the Combined Cr(VI) Removal Capacity of Sawdust and Sawdust-Immobilized Acinetobacter haemolyticus Supplied with Brown Sugar

2009

Ahmad, Wan Azlina | Zakaria, Zainul Akmar | Razali, Firdausi | Samin, Jefri

The purpose of this study is to evaluate the combined Cr(VI) removal capacities of nonliving (untreated rubber wood sawdust, URWS) and living biomass (URWS-immobilized Acinetobacter haemolyticus) in a continuous laboratory scale downward-flow two column system. Synthetic solutions of Cr(VI) between 237 and 320 mg L⁻¹ were mixed with 1 g L⁻¹ brown sugar in a nonsterile condition. Final Cr(VI) of between 0 and 1.6 mg L⁻¹ indicate a Cr(VI) removal capacity of 99.8-100%. The bacterial Cr(VI) reduction capacity increased with column length. This study shows the feasibility of using the two column system consisting of living (bacteria) and nonliving biomass (URWS) as a useful alternative treatment for Cr(VI) contamination in the aqueous system.

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