1. Cov cuab yeej pretreatment muab nyob rau hauv lub kaw lus tsis haum rau cov dej nyoos zoo thiab ntws, los yog lub kaw lus tsis tau nruab nrog cov txheej txheem tsim nyog.
2. Cov cuab yeej pretreatment tsis ua haujlwm ib txwm, uas yog, cov cuab yeej ua ntej pretreatment ntawm lub cev muaj peev xwm tshem tawm tsawg ntawm cov dej nyoos SDI muaj pes tsawg leeg, turbidity, colloid, thiab lwm yam, thiab cov nyhuv pretreatment tsis zoo tagnrho.
3. Cov khoom siv tsis raug raug xaiv rau lub kaw lus lossis cov khoom siv tsis raug xaiv (tswj, kav dej thiab lwm yam).
4. Cov tshuaj tua kab mob tsis ua haujlwm (acid, flocculation / coagulant aid, scale inhibitor / dispersant, txo tus neeg sawv cev thiab lwm yam).
5. Tsis ua raws li kev tiv thaiv tsim nyog tom qab cov khoom siv ua haujlwm tsis tu ncua lossis lub kaw lus tsis siv.
6. Cov khoom siv tsis tsim nyog thiab kev siv los ntawm cov neeg ua haujlwm tswj xyuas kev ua haujlwm (tus nqi rov qab, dej tawm, cov dej ntim ntau, qhov sib txawv, kev tu thiab lwm yam).
7. Lub sij hawm ntev tsub zuj zuj ntawm insoluble sediments nyob rau hauv lubRO membrane system.
8. Cov khoom ntawm cov dej nyoos tau hloov pauv zoo heev lossis cov yam ntxwv ntawm cov dej tau hloov pauv.
9. Muaj ntau theem ntawm microbial paug tau tshwm sim nyob rau hauv lubrov qab osmosis membrane system.
