Sludge vs Slurry - What's the difference?

sludge | slurry |

As nouns the difference between sludge and slurry

is that sludge is a generic term for solids separated from suspension in a liquid while slurry is any flowable suspension of small particles in liquid.

As verbs the difference between sludge and slurry

is that sludge is (informal) to slump or slouch while slurry is to make a slurry (of some material).

As an adjective slurry is

slurred, tending to slur.



(wikipedia sludge)


  • A generic term for solids separated from suspension in a liquid.
  • * {{quote-magazine, date=2013-06-29, volume=407, issue=8842, page=28, magazine=(The Economist)
  • , title= High and wet , passage=Floods in northern India, mostly in the small state of Uttarakhand, have wrought disaster on an enormous scale.
  • A residual semi-solid material left from industrial, water treatment, or wastewater treatment processes.
  • A sediment of accumulated minerals in a steam boiler.
  • A mass of small pieces of ice on the surface of a body of water.
  • (uncountable, music) sludge metal
  • Synonyms

    * (separated solids) mud, mire, ooze, slush

    Derived terms

    * activated sludge * oil sludge * sludge metal * sludgecore


  • (informal) to slump or slouch.
  • to slop or drip slowly.
  • slurry


    Etymology 1

    Unclear; probably related to (etyl) ; compare slur. From mid-15th c. (wikipedia slurry)


  • Any flowable suspension of small particles in liquid.
  • * 1981 , National Research Council (U.S.) Committee on Animal Nutrition, Feeding Value of Ethanol Production By-products , page 26,
  • While little information is available, it[distillers wet yeast] probably is similar to spent brewers yeast slurry .
  • * 2002 , R. Peter King, Introduction to Practical Fluid Flow , page 81,
  • The most important application of fluid flow techniques in the mineral processing industry is the transportation of slurries'. Whenever solid materials are in particulate form transportation in the form of a ' slurry is possible.
  • * 2006 , Mark A. Shand, The Chemistry and Technology of Magnesia , page 146,
  • Magnesium hydroxide slurry' consists of an aqueous suspension of particulate magnesium hydroxide. The principle sources of '''slurry''' are from seawater- or brine-produced magnesium hydroxide, natural brucite, or from the slaking of magnesium oxide powder. Magnesium hydroxide ' slurry is gaining in popularity as a replacement for caustic soda and lime in waste-water treatment applications.
  • * 2011 , Wan Renpu, Petroleum Industry Press staff (translators), Advanced Well Completion Engineering , page 259,
  • The other properties of cement slurry' and set cement are also related closely to cement ' slurry density.
  • (mining) Liquid waste from some types of mining, such as mountain top removal mining, usually very toxic and stored nearby in large dams.
  • * 2006 , Raymond N. Yong, Catherine N. Mulligan, Masaharu Fukue, Geoenvironmental Sustainability , page 145,
  • Slurry' tailings ponds are by far the major type of containment facilities for ' slurry tailings.
  • (agriculture) A mixture of animal waste, other organic material and sometimes water, stored in a slurry pit and used as fertilizer; also used in combination, as pig slurry , etc.
  • * 2004 , W. H. Rulkens, 11: Overview of resource recovery techmologies for biowaste'', Piet Lens, B. Hamelers, Harry Hoitink, Werner Bidlingmaier (editors), ''Resource Recovery and Reuse in Organic Solid Waste Management , page 249,
  • In the Netherlands, the most problematic agricultural waste is liquid pig manure or pig slurry .
    Derived terms
    * coal slurry * meat slurry * slurry pit * slurry wall


  • To make a slurry (of some material).
  • To apply a slurry (to).
  • Next week we will be slurrying the parking lot.

    Etymology 2

    From .


  • Slurred, tending to slur.
  • He spoke with a slurry''' voice.'' — ''His voice became progressively '''slurrier as he drank the three bottles of wine.