Hauv kev kho dej, cov lim dej ua kom pom tseeb yog siv los tshem tawm cov kab paug hauv dej, suav nrog decolorization, tshem tawm tsw, txhua yam ntawm cov organic yaj; Hauv cov txheej txheem dej ntshiab tuaj yeem siv los ua ion txauv, electrodialysis, thim rov qab osmosis pretreatment, tshem tawm cov organic teeb meem, colloid thiab residual chlorine, thiab lwm yam. Nws kuj tseem siv tau los ua ib qho kev kho mob tob tob tom qab kev kho mob thib ob los xyuas kom meej qhov zoo. ntawm cov dej siv dua.
Tshwj xeeb hauv adsorption ntawm cov organic teeb meem hauv dej, colloidal hais, kab mob. Adsorb chlorine, ammonia, bromine iodine thiab lwm yam tsis yog xim hlau.
Adsorb hlau ions, xws li nyiaj, arsenic, hexavalent chromium, mercury, antimony, tin plasma. Nws tuaj yeem tshem tawm chroma, tsw thiab cua sov qhov chaw hauv dej, thiab ua kom lub neej kev pab cuam ntawm kev sib pauv resin.