Diatomaceous Earth


Appears in

Oxford Companion to Wine

Oxford Companion to Wine

By Jancis Robinson

Published 2006

  • About

diatomaceous earth (DE), widely used in filtration, is a naturally occurring, highly porous, chalky textured sedimentary rock made mainly of silica and consisting of fossilized remains of diatoms, a type of hard-shelled algae. It is also known as Kieselguhr. There are, however, increasing concerns about potential health hazards and safe disposal of used DE.