![]() ![]() Examples include slow sand filters and trickling filters. įiltration is also used to describe biological and physical systems that not only separate solids from a fluid stream, but also remove chemical species and biological organisms by entrainment, phagocytosis, adsorption and absorption. Filtration occurs both in nature and in engineered systems there are biological, geological, and industrial forms. The separation of solid and fluid is imperfect solids will be contaminated with some fluid and filtrate will contain fine particles (depending on the pore size, filter thickness and biological activity). The size of the largest particles that can successfully pass through a filter is called the effective pore size of that filter. Oversize particles may form a filter cake on top of the filter and may also block the filter lattice, preventing the fluid phase from crossing the filter, known as blinding. Solid particles that cannot pass through the filter medium are described as oversize and the fluid that passes through is called the filtrate. JSTOR ( August 2018) ( Learn how and when to remove this template message)ĭiagram of simple filtration: oversize particles in the feed cannot pass through the lattice structure of the filter, while fluid and small particles pass through, becoming filtrate.įiltration is a physical separation process that separates solid matter and fluid from a mixture using a filter medium that has a complex structure through which only the fluid can pass.Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. ![]() This article needs additional citations for verification. ![]()
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