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
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
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)
A mixture of solid waste material and water Sludges result from the concentration of contaminants in water and wastewater treatment processes Typical wastewater sludges contain from 0 5 to 10 percent solid matter Typical water treatment sludges contain 8 to 10 percent solids
(Otomotiv) A combination of oxidized oil, gasoline, coolant, and blow-by that can foul an engine. Some engine oils have detergents to break down sludge
Solid matter that settles to the bottom of sedimentation tanks in a sewage treatment plant and must be disposed of by digestion or other methods or recycled to the land
Solid, semi-solid or liquid waste from municipal, commercial or industrial waste-treatment facilities, waste-water treatment plants and air pollution control facilities In discussions of environmental controls, the mud-like residue that results from the cleaning process of scrubbers or certain other devices designed to prevent solid particles from entering the environment
Any solid, semisolid or liquid waste generated from municipal, commercial, or industrial wastewater treatment plant, water supply treatment plant, or air pollution control facility or any other such waste having similar characteristics and effects It can be a hazardous waste