Rov qab osmosis (RO) thiab nanofiltration (NF) thev naus laus zis yog ob qho khoom siv lim dej rau kev kho dej. Cov cuab yeej lim dej feem ntau yog qhov txawv los ntawm rov qab osmosis membrane thiab nanofiltration membrane ua los ntawm ob lub thev naus laus zis no. Lawv muaj qhov sib txawv hauv qab no:
1. Kev lim dej sib txawv
Rov qab osmosis tuaj yeem tshem tawm qhov kev daws teeb meem me tshaj nrog lub cev hnyav ntawm tsawg dua 0.0001 μ M. Nws feem ntau yog siv hauv kev tsim cov dej huv hauv tsev, dej ultrapure thiab dej kho mob ultrapure. Nanofiltration tuaj yeem tshem tawm cov kuab tshuaj nrog qhov hnyav hnyav txog li 0.001 μ m. Nws tau siv nyob rau hauv ib puag ncig nrog qis me ntsis pom qhov tseeb qhov xav tau. Nws feem ntau yog siv rau cov dej muag muag, kev ua kom muaj kuab paug me me thiab tsim cov dej huv huv.
2. Cov nqi sib txawv desalination
Tus nqi desalination ntawm thim rov qab osmosis thev naus laus zis yog 99.5%, uas tuaj yeem cuam tshuam tau zoo tag nrho cov ntsev yaj thiab ntau yam tshuaj organic nrog lub cev hnyav ntau dua 100, thiab tso cai rau cov pab pawg me me kom dhau mus. Lub nanofiltration system tau txais kev hla kev lim dej, thiab qhov kev lim dej yog nyob nruab nrab ntawm 80 thiab 90%. Nws tsuas yog siv rau kev mloog zoo thiab ua kom huv ntawm cov tshuaj macromolecular.
3. Qhov feem ntawm" dej tsis huv" tsim tawm txawv
Ob leeg thim rov qab osmosis thiab nanofiltration ua kom dej huv los ntawm kev nias thiab lub zog ua haujlwm. Txawm li cas los xij, vim muaj qhov sib txawv sib txawv ntawm daim nyias nyias, cov dej khib nyiab uas tsim los ntawm thim rov qab osmosis yog 1: 2-1: 3, thiab cov dej khib nyiab sib piv ntawm nanofiltration yog 1: 1. Hais txog kev txuag dej thiab kev tiv thaiv ib puag ncig, thim rov qab osmosis thev naus laus zis siv cov peev txheej ntau dua. Piv nrog nanofiltration thev naus laus zis, nanofiltration thev naus laus zis muaj qhov zoo ntawm kev tshem tawm ib nrab ntawm monovalent ions, cov txheej txheem qis osmotic siab, qis kev ua haujlwm siab Lub zog txuag thiab lwm yam zoo.
