Technical Bulletin No. 0213: A Study of Pipeline Flow Characteristics of Pulp and Papermill Sludges

The widespread adoption of mechanical clarification has been accompanied by the installation of sludge pumping facilities designed to return such sludges to the mill for reuse, transfer sludges to long-term storage basins, or to convey sludges to mechanical de-watering systems. In each case, some knowledge of the hydraulic behavior of the sludge over a range of consistencies is needed for rational design. To date, such designs have been based in great measure on extrapolation of data from either the sewage sludge disposal field or from known behavior of pulp suspensions.