凝ぎょう集しゅう剤ざい

noun

flocculant; coagulant

Technical term in chemistry and water treatment for a substance that causes fine particles to clump together.

• 浄じょう水すい場じょうでは凝ぎょう集しゅう剤ざいを使つかって水すい中ちゅうの微び粒りゅう子しを沈ちん殿でんさせる。

  At water purification plants, flocculants are used to precipitate fine particles in the water.