Question

defination of sludge​

Answer 1

thick, soft, wet mud or a similar viscous mixture of liquid and solid components, especially the product of an industrial or refining process.

Answer 2

• Sludge is a solid precipitated material obtained during the treatment of effluents before discharging them into water bodies by the waste water treatment plants

• . Actually the waste water is pumped into oxidation ponds(after removing sediments) where microorganisms oxidise the organic matter releasing Carbon dioxide and the solid precipitated material obtained is sludge.