A mixture of solids and water produced during the treatment of waste water or sewage This will frequently have to be removed from the treatment system by de-sludging
the solids (and accompanying water and organic matter) which are separated from sewage or industrial wastewater in treatment plant facilities Sludge separation and disposal is one of the major expenses in wastewater treatment operations
Solid matter settling to the bottom of sedimentation tanks in a sewage treatment plant
A semi-solid residue, containing microoroganisms and their products, from any water treatment process Softening The removal of calcium and magnesium from water to reduce hardness
(1) mud, mire, or ooze covering the ground or forming a deposit, as on a river bed; (2) slushy matter or sediment such as that precipitated by the treatment of sewage or collected in a boiler
Precipitated solid matter produced by water and sewage or mineral treatment processes
Sludge is thick mud, sewage, or industrial waste. All dumping of sludge will be banned by 1998
The solid, semi-solid or liquid residue removed during the treatment of wastewater Sludge includes septage removed from septic tanks
A general term for the precipitated solid matter produced during water and sewage treatment; solid particles composed of organic matter and microorganisms that are involved in aerobic sewage treatment (activated sludge) (See 658)