Technical Bulletin No. 0285: An Investigation of the Separability and Reuse Potential of the Ash Component of High Ash Content Papermill Sludges

The manufacture of filled and coated grades of paper frequently gives rise to sludges rich in ash components such as clay and Ti02. Their high ash content (a) can have a negative bearing on their subsequent disposal, particularly by incineration, and (b)raises the possibility of their subsequent processing for recovery and reuse of the ash components, and to facilitate disposal of the low-ash component.