to be activated
51activated charcoal, activated carbon — A granular material usually produced by the roasting of cellulose base substances, such as wood or coconut shells, in the absence of air. It has an extremely porous structure and is used in water conditioning as an adsorbent for organic matter …
52activated carbon — pure carbon in porous form used in aquaria to adsorb dissolved organic matter, chlorine, and yellowing compounds (and hence in the latter case keeps water clear). Must be changed regularly as it clogs and can release phosphates into the water… …
53activated sludge — (sluj) Solid matter or sediment composed of actively growing microorganisms that participate in the aerobic portion of a biological sewage treatment process. The microbes readily use dissolved organic substrates and transform them into additional …
54activated macrophage — A macrophage (mononuclear phagocyte) that has been stimulated by lymphokines and that has greatly enhanced cytotoxic and bactericidal potential …
55activated alumina — Chem. alumina in the form of granules having many fine pores, used to adsorb water and various gases. * * * …
56activated mine — a mine with a secondary fuze designed to explode if the mine is tampered with. * * * …
57activated sludge — sludge (def. 8). * * * …
58activated-sludge method — ▪ sewage treatment sewage treatment (sewage system) process in which sludge, the accumulated, bacteria rich deposits of settling tanks and basins, is seeded into incoming waste water and the mixture agitated for several hours in the… …
59activated sludge — noun Sewage that has been aerated and agitated in order to promote the growth of beneficial microorganisms that break down organic matter …
60activated complex — noun A transitional structure, in an energetically excited state, that forms between the reactants of a chemical reaction and breaks down to form the products …
