Heavy metal uptake during anaerobic digestion of combined electroplating and brewery wastewaters

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Batch and continuous culture laboratory-scale experiments were conducted to quantify the effect of combining chrome and nickel electroplating effluent (EE) and brewery effluent as substrate for established anaerobic digester granules. EE at a 1:12 ratio in brewery effluent was inhibitory to anaerobic digestion but acclimation at a 1:24 ratio occurred during continuous culture experiments. At least 90% of the chromium and nickel was absorbed by the granules with nickel attaching to granule perimeters while chromium penetrated into deeper recesses. © Rapid Science Ltd. 1998

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