Transport Phenomena Applied to Sludge Dewatering

by Peter Kos, Development Engineer; Dorr-Oliver Corp., Stamford, Conn.; formerly, Research Assoc., Dept. of San. Engrg., Czech Technical Univ., Prague, Czechoslovakia, and Ph.D. Candidate, Univ. of Massachusetts, Amherst, Mass.,
Donald Dean Adrian, (M.ASCE), Prof.; Dept. of Civ. Engrg., Univ. of Massachusetts, Amherst, Mass.,

Serial Information: Journal of the Environmental Engineering Division, 1975, Vol. 101, Issue 6, Pg. 947-965

Document Type: Journal Paper


Sludge dewatering is examined and treated as a flow of liquid (filtrate) through a nonrigid (deforming) saturated flocculent porous medium. A flocculent porous medium model is developed and its one-dimensional mathematical description is presented. It is necessary to know two physical characteristics of sludge to use this model for the description of sludge dewatering; the modulus of linear compressibility (consolidation characteristic) and the hydraulic conductivity (filtration characteristic). The feasibility of their measurement is demonstrated in the experimental portion of the paper.

Subject Headings: Transport phenomena | Sludge | Dewatering | Porous media flow | Filtration | Mathematical models | Hydraulic models | Deformation (mechanics)

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