Sludge 01
Sludge 01 : (1) (Techn) Any muddy or slushy mass, such as mud from a drill hole in boring, muddy sediment in a steam boiler, or precipitated solid matter resulting from sewage treatment processes. (2) (Techn) An accumulation of heavy impurities, including water, in the bottom of an internal combustion engine crankcase or a petroleum product storage tank. Syn: Bottom Sttlings