Ua ntej, nws zoo tshem tawm cov khib nyiab los ntawm cov dej khib nyiab. Los ntawm lub cev sedimentation thiab lwm txoj kev, nws settles loj hais impurities, txo cov dej turbidity.
Qhov thib ob, nws decomposes organic teeb meem hauv dej khib nyiab. Siv cov kev ua haujlwm metabolic ntawm cov kab mob microorganisms, nws hloov cov kuab tshuaj organic mus rau hauv cov khoom tsis zoo, txo cov pa phem ib puag ncig.
Tsis tas li ntawd, nws tshem tawm cov as-ham xws li nitrogen thiab phosphorus los ntawm cov dej khib nyiab, tiv thaiv eutrophication thiab kev loj hlob ntawm algae ntau dhau.
Tsis tas li ntawd, nws tua cov dej khib nyiab, tua cov kab mob tsis zoo xws li cov kab mob thiab cov kab mob, ua kom muaj kev nyab xeeb ntawm cov dej ntws tawm.
Los ntawm kev kho cov dej num no, cov cuab yeej kho dej khib nyiab siv zog los txhim kho cov dej khib nyiab zoo, ua kom nws ua tau raws li cov qauv kev xa tawm thiab ua kom tiav cov peev txheej dej rov ua dua lossis kev tso tawm pov tseg, ua lub luag haujlwm tseem ceeb hauv kev tiv thaiv ib puag ncig thiab tswj kev sib npaug ntawm ecological.
