| 释义 |
activated sludge
activated sludge n (Microbiology) a mass of aerated precipitated sewage added to untreated sewage to bring about purification by hastening decomposition by microorganisms Translationsactivated sludge
activated sludge[′ak·tə‚vād·əd ′sləj] (civil engineering) A semiliquid mass removed from the liquid flow of sewage and subjected to aeration and aerobic microbial action; the end product is dark to golden brown, partially decomposed, granular, and flocculent, and has an earthy odor when fresh. activated sludgeSewage sediment that has been subjected to vigorous aeration and the action of microorganisms.activated sludge
ac·ti·vat·ed sludge meth·oda method of sewage disposal in which sewage is treated with 15% bacterially active liquid sludge, which is produced by repeated vigorous aeration of fresh sewage to form floccules or sediment; when this flocculation process is complete, the resulting activated sludge contains large numbers of bacteria, together with yeasts, molds, and protozoa, which actively effect the oxidation of organic compounds; this mixture is piped to a sedimentation tank, the effluent from which is completely treated sewage.activated sludge any living material used in sewage treatment, consisting mainly of bacteria and protozoans, that breaks down organic matter in the sewage and increases by multiplication during the process. Part of the new sludge is used in the continuing treatment of the sewage.ThesaurusSeeactivated |