activated sludge

noun

sludge(def 8).

Words nearby activated sludge

activated alumina, activated carbon, activated charcoal, activated mine, activated resin, activated sludge, activation analysis, activation energy, activator, active, active anaphylaxis

British Dictionary definitions for activated sludge

activated sludge

noun

a mass of aerated precipitated sewage added to untreated sewage to bring about purification by hastening decomposition by microorganisms