Application Note | April 30, 2010

Effective DE Trap Filtration In The Brewery

Source: 3M Purification Inc.

Diatomaceous earth (DE) filters, some times called Kieselguhr, pressure leaf, or primary filters, are one of the most prevalent filters found in modern breweries. Virtually all beers, pasteurized or not, will pass through a DE filter.

One of the draw backs with DE filters however, is that they can shed DE fines into the beer, resulting in unacceptable turbidity in the beer and a sediment in the bottom of the beer bottle once allowed to settle. To prevent this, DE trap filters are installed downstream of the DE filter, just before the bright beer tank.

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