Ha u khetha mochini o hloekisang metsi ka tlas'a teba, ho na le lintlha tse 'maloa tse lokelang ho nahanoa:

1. **Mofuta oa Sehloeki sa Metsi:**
- Ho na le mefuta e 'maloa e fumanehang ho kenyelletsa Microfiltration (MF), Ultrafiltration (UF), Nanofiltration (NF), le Reverse Osmosis (RO). Ha u khetha, nahana ka theknoloji ea ho sefa, katleho ea sefa, boiketlo ba ho khutlisa cartridge, nako ea bophelo, le litšenyehelo tsa ho nchafatsa.

2. **Ho hloekisa hanyenyane (MF):**
- Ho nepahala ha filthara hangata ho tloha ho li-microns tse 0.1 ho isa ho tse 50. Mefuta e tloaelehileng e kenyelletsa li-cartridge tsa PP filter, li-cartridges tse entsoeng ka carbon filter, le li-cartridges tsa ceramic filter. E sebelisoa bakeng sa ho sefa mahoashe, ho tlosa likaroloana tse kholo tse kang sediment le mafome.

- Mefokolo e kenyelletsa ho se khone ho tlosa lintho tse kotsi joalo ka libaktheria, ho se khone ho hloekisa li-cartridge tsa filthara (hangata li lahloa), le ho nkela sebaka khafetsa ho hlokahalang.

3. **Tlhahiso e phahameng ka ho fetisisa (UF):**
- Ho nepahala ha filthara ho tloha ho 0.001 ho isa ho 0.1 microns. E sebelisa theknoloji ea ho arohana ha membrane ea khatello ho tlosa mafome, sediment, colloids, libaktheria le limolek'hule tse kholo tsa manyolo.

- Melemo e kenyelletsa sekhahla se phahameng sa ho khutlisa metsi, ho hloekisa habonolo le ho hlatsoa morao, nako e telele ea bophelo, le litšenyehelo tse tlase tsa ts'ebetso.

4. **Nanofiltration (NF):**
- Ho nepahala ha filthara ho pakeng tsa UF le RO. E hloka motlakase le khatello bakeng sa theknoloji ea karohano ea membrane. E ka tlosa li-ion tsa calcium le magnesium empa e kanna ea se tlose ka botlalo li-ion tse kotsi.

- Mefokolo e kenyelletsa sekhahla se tlase sa ho khutlisa metsi le ho se khone ho sefa lintho tse itseng tse kotsi.

5. **Reverse Osmosis (RO):**
- Ho nepahala ho holimo ka ho fetesisa ho ka bang 0.0001 microns. E ka sefa hoo e batlang e le litšila tsohle ho kenyeletsoa libaktheria, livaerase, metale e boima, le lithibela-mafu.

- Melemo e kenyelletsa sekhahla se phahameng sa desalination, matla a phahameng a mochini, nako e telele ea bophelo, le mamello ho tšusumetso ea lik'hemik'hale le likokoana-hloko.

Mabapi le bokhoni ba ho sefa, boemo hangata ke Microfiltration> Ultrafiltration> Nanofiltration> Reverse Osmosis. Ka bobeli Ultrafiltration le Reverse Osmosis ke likhetho tse loketseng ho latela likhetho. Ultrafiltration e bonolo ebile e theko e tlase empa e ke ke ea sebelisoa ka kotloloho. Reverse Osmosis e loketse litlhoko tsa boleng bo holimo ba metsi, joalo ka ho etsa tee kapa kofi, empa e ka hloka mehato e meng bakeng sa tšebeliso. E kgothaletswa ho khetha ho ea ka litlhoko tsa hau tse khethehileng le likhetho.