| 单词 | activated sludge |
| 释义 | > as lemmasactivated sludge activated sludge n. (in waste treatment) oxygenated sewage containing aerobic microorganisms and invertebrates which break down the organic constituents and precipitate the products; (also) the sludge so precipitated, some of which is recycled for the treatment of more waste. ΘΚΠ the world > physical sensation > cleanness and dirtiness > sanitation > provision of sewers > sewage treatment > [noun] > aerated sewage activated sludge1915 1915 Public Health 28 121/2 The members then visited the Wakefield Sewage Works where the experiments on the treatment of sewage with activated sludge were explained by the city surveyor. 1934 Jrnl. Inst. Sanit. Engin. Sept. 252 The sewage is settled, treated by the activated sludge process, by sand filters and by chlorination. 1998 Water & Waste Treatm. May 24/2 Activated sludge is a mixture of mobile, slime-forming and filamentous bacteria, protozoans, rotifers and higher invertebrates. < as lemmas |
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