Abstract

This chapter provides an introduction of granular filtration. Granular filtration is a fluid–solid separation process commonly applied to remove minute quantities of small particles from various kinds of fluids. The significant number of patents granted in recent years to liquid- and gas-cleaning processes based on granular filtration attests to its enduring utility. The versatility of granular filtration is evident from its scope of application as well as from the manner in which it is carried out. Either liquid or gas fluid streams can be treated. The basic principle of granular filtration remains the same regardless of the system being treated, the medium used, or the manner in which filtration is conducted. The purpose of this book is to present a systematic and rational treatment of deposition and other problems arising from the flow of fluid–particle suspensions through granular media. This chapter discusses granular filtration as a fluid–particle separation technology. The chapter also compares it against fibrous filtration, in which the removal of particles from gas streams is effected by passing the streams through fibrous media of various kinds. The chapter also discusses various uses of granular filtration such as for water treatment and gas cleaning.

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