Diatomaceous Earth (DE) Trap Filtration
Particle filters that help capture stray DE fines downstream of the DE filter.
Diatomaceous earth (DE) filters can release small amounts of unwanted DE fines into the beer during processing. The rate of release is often a function of operator experience, the age of the equipment, and how well it is maintained. Many breweries will install a DE trap filter, or guard filter, just downstream of the DE filter to catch any stray DE fines before they continue in the process. Allowing DE fines to continue in the beer can lead to off flavors and turbidity, or fouling of downstream equipment.