Diatomaceous Earth Filter How It Works. A diatomaceous earth filter (aka a de filter) is composed of several grids that hold the diatomaceous earth powder. Diatomaceous earth removes these unwanted particles from beer without affecting the taste or color.
Diatomaceous earth is thought to kill insects by dehydrating them or drying them out. There is no added organic pesticide necessary. It is obvious from the scientific reports as well as anecdotal attestation, that food grade diatomaceous earth delivers numerous positive effects for human beings and other creatures too.
Diatomaceous earth works by cutting the pest, causing it to dry up and die.
When diatoms die, they leave tiny silica shells that sink to the lake floor. There is more than one type of diatomaceous earth. The filter is the most common and most efficient filter on the market. The empty shells then collect at the bottom, forming a sediment which is known by a couple of names, either diatomite or diatomaceous earth.