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Control of the phosphorus level of effluent in the treatment of forest industry waste waters



Control of the phosphorus level of effluent in the treatment of forest industry waste waters



Water Science and Technology 20(1): 81-86



The activated sludge process may require the addition of phosphorus, with consequent problems related to excess P levels in the plant effluent. Methods for the control of P levels include biological P removal and various process modifications. Results based on pilot and full-scale experience in 2 kraft mills are reported. The addition of ferrous sulfate to the aeration basin of an activated sludge plant reduced total P to 1.2 mg/litre. Sludge settleability was also slightly improved.

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Accession: 001554829

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