a: Carbon filtration ~
b: Swiss cheese
What:
"The water then is passed through grains of carbon that has been "activated" - superheated so that vast numbers of tiny pores are opened up to trap particles that might remain in the water. It's like punching millions of additional holes in a block of Swiss cheese, said Daniel Olson of Arcadis U.S. Inc., the project engineer."
Useful?
Writer: Daniel Olson
LCC:
Where:
Date: Sep 17 2015 3:32 PM
# 8629 Critique Analogy