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activated sludge

Noun CEFR B2

Definitions

Sewage that has been aerated and agitated in order to promote the growth of beneficial microorganisms that break down organic matter.

countable, uncountable

Equivalents

CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
See all B2 English words →

See also

activater Activates Activating Activation activation analysis activation energy

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