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The bacterial reduction of Cr(VI) from industrial wastewater was evaluated using a 2.0-m3 bioreactor. Liquid pineapple waste was used as a nutrient for the biofilm community formed inside the bioreactor. The use of rubber wood sawdust as packing material was able to immobilize more than 106 CFU mL−1 of Acinetobacter haemolyticus cells after 3 days of contact time. Complete reduction of 15–240 mg L...
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