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:
“The technologist was the final guise of the white missionary, industrialization the last gospel of a dying race and living standards a substitute for a purpose in living.”
—Max Frisch (1911–1991)
“The chief want, in every State that I have been into, was a high and earnest purpose in its inhabitants. This alone draws out “the great resources” of Nature, and at last taxes her beyond her resources; for man naturally dies out of her.”
—Henry David Thoreau (1817–1862)
“The purpose of playing, whose end, both at the first and now,
was and is, to hold as ‘twere the mirror up to nature: to show
virtue her feature, scorn her own image, and the very age and
body of the time his form and pressure.”
—William Shakespeare (1564–1616)