Multi-media lim yog txheej txheem uas ib los yog ob peb lim xov xwm siv los hla dej nrog siab turbidity los ntawm ib tug tej thickness ntawm granular los yog non-granular cov ntaub ntawv nyob rau hauv ib tug tej yam siab, yog li no zoo tshem tawm cov impurities thiab clarifying dej. Siv rau hauv kev kho dej kom tshem tawm turbidity, softened dej, pre-kho cov dej ntshiab, thiab lwm yam., turbidity ntawm effluent tuaj yeem ncav cuag qis dua 3 degrees.
Lub ntsiab lus ntawm kev pom, nyob rau hauv cov txheej txheem ntawm kev kho dej, pom feem ntau yog hais txog cov txheej txheem ntawm kev khaws cia cov impurities nyob rau hauv cov dej nrog lim cov ntaub ntawv txheej xws li quartz xuab zeb thiab anthracite, thiaj li hais tias cov dej yuav qhia meej. Cov khoom ntxeem tau siv rau kev pom yog hu ua cov khoom siv lim, thiab cov khoom siv lim yog granular, powdery thiab fibrous. Cov khoom siv lim dej feem ntau yog quartz xuab zeb, anthracite, activated carbon, manganese xuab zeb, magnetite, ceramics, pob yas, thiab lwm yam.
Multi-media filter (filter bed) yog lub lim nruab nrab uas siv ob lossis ntau tshaj tawm raws li lim txheej. Nyob rau hauv kev lag luam circulating dej kho system, nws yog siv los tshem tawm impurities nyob rau hauv dej phwj tuaj, adsorb roj, thiab lwm yam, kom cov dej zoo raws li cov kev cai ntawm recycling. . Kev ua haujlwm ntawm kev pom yog tsuas yog tshem tawm los yog colloidal impurities hauv dej, tshwj xeeb tshaj yog kom tshem tawm cov khoom me me thiab cov kab mob uas tsis tuaj yeem tshem tawm los ntawm nag lossis daus technology. BODs thiab COD kuj muaj qee qhov kev tshem tawm cov nyhuv.
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