Anaerobic treatment to improve sludge recovery at a deinked fiber pulp and paper mill, TAPPI JOURNAL February 2016

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ABSTRACT: Investigations were conducted to explore the use of anaerobic treatment options that may allow complete recovery of primary and wast activated sludge streams for incineration from a graphic paper mill with an integrated deinked pulp plant. The effective reduction of wast activated sludge quantity (55%-65%) was obtained be the anaerobic treatment of wastewater from the deinked pulp plant or by the anaerobic stabilization of the mill effluent from primary treatment, where chemical oxygen demand (COD) removal efficiency of 67.6% and 64.8%, and biogas potential of 440 and 496m³/tCOD _removed were achieved, respectively.

Application: Milles can use the study results to integrate sludge and wastewater management and reduce mill operational costs and environmental impact.