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Mining Engineering Commons

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Iowa State University

1984

Articles 1 - 1 of 1

Full-Text Articles in Mining Engineering

Resource Recovery From Wastewater Treatment Sludge Containing Gypsum, L.L. Smith, M.L. Fortney, C.E. Morris, Thomas D. Wheelock, J.A. Carrazza Jan 1984

Resource Recovery From Wastewater Treatment Sludge Containing Gypsum, L.L. Smith, M.L. Fortney, C.E. Morris, Thomas D. Wheelock, J.A. Carrazza

Chemical and Biological Engineering Conference Presentations and Proceedings

The disposal of wastewater treatment sludge generated at the Radford Army Ammunition Plant (RAAP) is a serious problem. The sludge is produced by neutralizing spent acid contained in the wastewater with lime, and consists principally of very finely divided wet gypsum (calcium sulfate dihydrate). Although the sludge is presently being disposed of in a landfill, the sludge is difficult to handle and convert into a load-bearing material. Therefore an alternative method of disposal is being developed and evaluated.

The alternative method involves drying and granulating the sludge, followed by high temperature calcination in a fluidized bed reactor to recover usable ...