Effective DE Trap Filtration In The Brewery

3M Purification Inc (formerly CUNO)

Diatomaceous earth (DE) fil ters, some times called Kie sel guhr, pres - sure leaf, or pri mary fil ters, are one of the most prev a lent fil ters found in mod ern brew er ies. Vir tu ally all beers, pas teur ized or not, will pass through a DE fil ter.

One of the draw backs with DE fil ters how ever, is that they can shed DE fines into the beer, re sult ing in un ac cept able tur bid ity in the beer and a sed i ment in the bot tom of the beer bot tle once al - lowed to set tle. To pre vent this, DE trap fil ters are in stalled down - stream of the DE fil ter, just be fore the bright beer tank.

This Ap pli ca tion Brief dis cusses the ben e fits of the CUNO PolyNet car tridge fil ter in clud ing:

• absolute retention that provides consistent performance
• a novel media construction that results in a robust fast flowing, high retention filter