活かっ性せい汚お泥でい

noun

activated sludge

Technical term in wastewater treatment; refers to the biologically active mass of microorganisms used to break down organic matter.

• 活かっ性せい汚お泥でい法ほうは下げ水すい処しょ理りで広ひろく使つかわれている。

  The activated sludge process is widely used in sewage treatment.