Clarification

Clarification is the process of clearing a fluid from a turbid condition. Natural waters containing much organic matter in mechanical suspension and in chemical solution are clarified by the addition of a little alum, which is precipitated with the organic matter, and the water then becomes healthy and refreshing. Liquids are often clarified by straining through several layers of cloth, or through sand or charcoal. A 'centrifugal' is a circular vessel provided with an outlet in the centre and also at the circumference, and which is capable of being made to revolve at a very high speed. When the muddy liquid is placed in the vessel, and the whole caused to revolve, it is found that the particles of dust, mud, or other matter fly to the circumference, leaving the liquid in the centre practically clear, so that it can be drawn off. See BEER, CLEARING NUT, FILTER, GELATINE, WINE.