SCIENCE|natural and applied sciences|physical sciences|chemistry
- áis scagacháin Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- filter aid | filtration aid
- en
- Definition any material used to assist filtration of colloids, extra fine particles, gel like, and highly compactible materials, which is difficult to be filtered due to low filtrate rate, unacceptable filtrate clarity, high cake moisture content, or serious filter medium clogging. They can be used as “precoat” on the surface of filter media or in conjunction with feeding suspension as “body feed” (or “admix”), or a combination of “precoat” and “body feed Reference American Filtration & Separation Society. Filter Aids http://www.afssociety.org/education/1205oneminute.htm [8.9.2009]
- Comment A filter aid material is characterized by the following properties:1. Porous particulate structure with irregular shapes (Figure 1); 2. Rigid particle and in-compactible filter cake;3. Excellent dispersing and suspending properties;4. Low bulk density;5. Chemical stable and inert within operating conditions.Principle types of filter aids include Diatomaceous Earth (DE), Perlite, cellulose, and Rice Hull Ash (RHA).