Question

What is sludge how it is treated

Answer 1

Sewage sludge treatment describes the processes used to manage and dispose of sewage sludge produced during sewage treatment. Sludge is mostly water with lesser amounts of solid material removed from liquid sewage. ... Reducing sludge volume may increase the concentration of some of these toxic chemicals in the sludge.

Answer 2

Explanation:

The residue that accumulates in sewage treatment plants is called sludge (or biosolids). Digested sludge is passed through a dewatering step; the dried solids are disposed of, and the water is sent back to secondary treatment. ...