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The application of low-level direct electric current (0.15 mA cm−2) as an electrokinetic technique to treat copper-contaminated mesophilic anaerobic granular sludge was investigated. The sludge was obtained from a full scale UASB reactor treating paper-mill wastewater and was artificially contaminated by Cu(NO3)2 or CuEDTA2− with initial copper concentrations of 1000 mg . kg−1 wet sludge. The effect...
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