Reference Terms
from Wikipedia, the free encyclopedia

Activated sludge

Activated sludge is a process in sewage treatment in which air or oxygen is forced into sewage liquor to develop a biological floc which reduces the organic content of the sewage.

Note:   The above text is excerpted from the Wikipedia article "Activated sludge", which has been released under the GNU Free Documentation License.
Related Stories

Earth & Climate News
May 24, 2017

Latest Headlines
updated 12:56 pm ET