Purpose
In a sewage (or industrial wastewater) treatment plant, the activated sludge process is a biological process that can be used for one or several of the following purposes:
- oxidizing carbonaceous matter: biological matter.
- oxidizing nitrogeneous matter: mainly ammonium and nitrogen in biological materials.
- removing phosphate.
- driving off entrained gases carbon dioxide, ammonia, nitrogen, etc.
- generating a biological floc that is easy to settle.
- generating a liquor that is low in dissolved or suspended material.
Read more about this topic: Activated Sludge
Famous quotes containing the word purpose:
“Nowadays, if New York has a heart, it might be the Garden. Almost everyone goes there, for one purpose or another. There are dog shows, and Sonja Henie and mass meetings.”
—In New York City, U.S. public relief program (1935-1943)
“A major misunderstanding of child rearing has been the idea that meeting a child’s needs is an end in itself, for the purpose of the child’s mental health. Mothers have not understood that this is but one step in social development, the goal of which is to help a child begin to consider others. As a result, they often have not considered their children but have instead allowed their children’s reality to take precedence, out of a fear of damaging them emotionally.”
—Elaine Heffner (20th century)
“It is my purpose to disclose the mystery at once, and to ask you to look for your interest,—should you choose to go on with my chronicle,—simply in the conduct of my persons, during this disclosure to others.”
—Anthony Trollope (1815–1882)