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Industrial wastewater treatment — covers the mechanisms and processes used to treat waters that have been contaminated in some way by anthropogenic industrial or commercial activities prior to its release into the environment or its re use.Most industries produce some wet waste… … Wikipedia
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technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… … Universalium
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silver — silverer, n. silverish, adj. silverless, adj. silverlike, adj. silverness, n. /sil veuhr/, n. 1. Chem. a white, ductile metallic element, used for making mirrors, coins, ornaments, table utensils, photographic chemicals, conductors, etc. Symbol:… … Universalium
Silver — /sil veuhr/, n. Abba Hillel /ab euh/, 1893 1963, U.S. rabbi, born in Lithuania. * * * I Metallic chemical element, one of the transition elements, chemical symbol Ag, atomic number 47. It is a white, lustrous precious metal, valued for its beauty … Universalium