Lecture 10

Armenante njit process variables affecting filtration

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Unformatted text preview: elatively constant with time PIERO M. ARMENANTE NJIT Process Variables Affecting Filtration • Flow rate of slurry • Type of slurry and solid particles contained in it − Liquid viscosity − Liquid density − Solid concentration − Particle size distribution − Surface charge of particles − Type and/or shape or particles PIERO M. ARMENANTE NJIT Process Variables Affecting Filtration • Type and properties of filter medium − Medium average particle size and shape − Medium particle size distribution − Medium surface charge − Medium density − Medium void fraction (porosity) − Mesh size opening • Height of filter medium • Allowable pressure drop across filter PIERO M. ARMENANTE NJIT Particle Removal Mechanisms Involved in Filtration • Mechanical straining • Sedimentation on filter medium • Impaction with filter medium • Interception by contact with filter medium • Flocculation • Adhesion − Chemical adsorption − Physical adsorption PIERO M. ARMENANTE NJIT Particle Removal Mechanisms Involved in Filtration - Straining After Metcalf and Eddy, Wastewater Engineering, 1991, p. 262 PIERO M. ARMENANTE NJIT Particle Removal Mechanisms Involved in Filtration - Sedimen...
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This document was uploaded on 03/30/2014 for the course CHEM 685 at NJIT.

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