Professional solution of primary filtration for medium and large microbreweries
Beer filtration through diatomaceous precoat filter candle is the most common solution of a beer filtration in a microbrewery of medium and large sizes .
The candles are mounted inside a cylindrical pressure vessel that receives unfiltered beer. The candle itself is the septum that holds the filter aid, which could be diatomaceous earth, perlite, cellulose, or other materials, during the solid–liquid separation.The candles themselves do not perform any filtration. It is the filter aid which coats the candle that does the actual filtration.
Candles are made from wedge or v-wire and have much greater precision than older types. Unfiltered beer passes from the outside of the candle, through the filter cake, and into the center of the candle. This now filtered beer passes up through a mounting plate or manifold holding the candles and out of the filter housing.