septic tank


General Science

  • noun a tank at a sewage treatment works in which sewage is collected to begin its treatment by anaerobic bacteria


  • noun an underground tank for household sewage that is not connected to the main drainage system and in which human waste is decomposed by the action of anaerobic bacteria


  • A watertight receptacle that receives the discharge from a sewage system, or part thereof. They are constructed to separate solids from the liquid, digesting organic matter during a period of detention, and discharging the clarified liquids.