Constant pressure filtration: The effect of a filter membrane

✍ Scribed by D.E. Smiles; P.A.C. Raats; J.H. Knight

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 607 KB
• Volume: 37
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(82)85029-x

✦ Synopsis

Theory developed to describe water movement and volume change in soils may be applied to many industrially important particulate liquid suspensions. The theory is used here to predict the important aspects of constant-pressure filtration where the filter membrane significantly impedes the escape of the liquid. The method requires measured liquid content-liquid potential and liquid content--liquid diffusivity relations of the suspensions, and the conductance of the filter membrane. Illustrative calculations for saturated bentonite slurry are presented. These calculatinns predict the evolution of the liquid and solid profiles in both material and physical space, and the cumulative volume of liquid expelled. as a function of time during filtration. Experiments using bentonite at two different pressures, and with a range of values of membrane conductance, con& integral predictions of the model.