sludge
sludge, in sewage treatment, solid matter that has settled out of suspension in sewage undergoing sedimentation in tanks or basins. See wastewater treatment.
This article was most recently revised and updated by Robert Curley.
Citation Information
Article Title:
sludge
Website Name:
Encyclopaedia Britannica
Publisher:
Encyclopaedia Britannica, Inc.
Date Published:
29 December 2014
Access Date:
November 13, 2026