Grease, light plastics and other floatable material that is skimmed from the surfaces of primary and secondary clarifiers.

a film of impurities or vegetation that can form on the surface of a liquid

Oil, grease, soap, and other materials that float to the top of the household sewage or waste water in a septic tank. Typically items in the scum layer are lighter than water and form a barrier to prevent odours.

Oils and greases and other material that will float forming a deposit on the top of the sewage.

the floatable materials that form an accumulating layer on the liquid surface inside a primary waste water treatment tank; includes oils, grease and soaps.

Extraneous matter or impurities risen to or formed on the surface of a liquid often as a foul filmy covering.

Floatable materials found on the surface of primary and secondary settling tanks consisting of food wastes, grease, fats, paper, foam, and similar matter.

Floatable material in wastewater made up of mainly fats, cooking oil and grease which are skimmed off during the treatment process.

A layer of wastewater particles floating on the liquid surface in a septic tank.

A mass of light solids, such as hair, grease, oils, and soaps floating on the surface of the wastewater in a septic tank

Any material that floats to the surface of wastewater during treatment, usually removed in sedimentation tanks.

A film of impurities that rises to or is formed on the surface of a liquid or is formed upon the surface of a solid object (such as the structure of a cooling tower).

(a) A floating layer of unmelted material on the molten glass surface. (b) The light colored marks which appear along the edges and as finger-prints on unglazed ware and bisque, caused by soluble salts in the clay. Adding barium carbonate to the clay body will prevent scumming.

The extraneous or foreign matter which rises to the surface of the water and forms a layer or film there. It can also be a residue deposited on the tile or walls of the pool or spa. Sources of scum are soap, oil, deodorant, hair spray, sun tan lotion and various others.

Waste foam that naturally rises and is constantly skimmed away by the sugarmaker when the sap is boiled.

1) the layer or film of extraneous or foreign matter that rises to the surface of a liquid and is formed there. 2) a residue deposited on a container or channel at the water surface. 3) a mass of solid matter that floats on the surface. b

The foreign matter which floats to the surface of the water and forms a layer or a film. It can also refer to a residue deposited on the tiles or walls of the pool.

grease, fats, and material that floats to the top of the septic tank

Scum is the third studio album by English punk rock band the Anti-Nowhere League and the first album of new material released since the original band's breakup ten years previously. A new lineup is featured, with only lead singer Animal and guitarist Magoo remaining from the band which recorded the much-criticised The Perfect Crime LP in 1987. The album also marks a return to the ANL's "classic" punk-metal sound.

Unwanted deposits of ink in the non-image area of a printed piece.

The residue of an emulsion, for example, that clogs the screen mesh, preventing the complete design from being transferred to substrate.

A film of ink printing in the non-image areas of an offset-litho plate.

Unwanted ink marks in the non-image area.

A film of ink printing in the non-image areas of a plate where it should not print.

Traces of printing ink which temporarily adhere, during litho printing, to the non-image area of the plate due to its inability to repel ink.

An undesirable film of ink that prints in the non-image areas of a plate in offset lithography.

Undesirable thin film of ink covering non-image area of printed sheet.

Scum is a film made in 1979 portraying the brutality of life inside a British borstal. Directed by Alan Clarke and starring Ray Winstone, Mick Ford, Julian Firth, John Blundell, Phil Daniels and Ray Burdis, it tells the story of a young offender named Carlin as he arrives at the institution, and his rise through violence and self-protection to the top of the inmates' pecking order, purely as a tool to survive. Beyond Carlin's individual storyline, it is also cast as an indictment of the borstal system's flaws in terms of its ineffectiveness at rehabilitating inmates, instead just turning them into even more broken individuals.