active sludge[′ak·tiv ′sləj]
A sludge rich in destructive bacteria used to break down raw sewage.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A sludge, 3 which is rich in destructive bacteria; useful in breaking down fresh sewage.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.