Activated sludge

  • activated sludge
  • Sludge that has been aerated and subjected to bacterial action; used to speed breakdown of organism matter in raw sewage during secondary waste treatment.
Abstract from DBPedia
    The activated sludge process is a type of wastewater treatment process for treating sewage or industrial wastewaters using aeration and a biological floc composed of bacteria and protozoa. The general arrangement of an activated sludge process for removing carbonaceous pollution includes the following items: An aeration tank where air (or oxygen) is injected in the mixed liquor. This is followed by a settling tank (usually referred to as "final clarifier" or "secondary settling tank") to allow the biological flocs (the sludge blanket) to settle, thus separating the biological sludge from the clear treated water.

    活性汚泥(かっせいおでい)とは、人為的・工学的に培養・育成された好気性微生物群を含んだ「生きた」浮遊性有機汚泥の総称であり、排水・汚水の浄化手段として下水処理場、し尿処理場、浄化槽ほかで広く利用されている。 活性汚泥のほかに浮遊物などを含んだ廃棄物は、汚泥として総称される。