Qhov txawv ntawm Microfiltration, Ultrafiltration, Nanofiltration thiab Reverse Osmosis
CovDkev xavBib nrabMkev ua kom pom tseeb,Ultrafiltration,Nanofiltration thiabRpuasOsmosis
1. Microfiltration
Lub microfiltration membrane tuaj yeem khaws cov khoom loj dua {{0}} 1-1 microns. Lub microfiltration membrane tso cai rau kev nkag mus ntawm macromolecules thiab yaj cov khib nyiab (inorganic ntsev), tab sis khaws cov khib nyiab, cov kab mob, thiab cov khoom hnyav molecular colloids. Kev khiav hauj lwm siab ntawm microfiltration membrane feem ntau yog 0.7-7bar.
Microfiltration feem ntau yog siv los ua kom pom tseeb thiab ua kom tsis muaj menyuam ntawm cov tshuaj hauv cov txheej txheem biomedical. Cov khoom siv microfiltration yog lim cov ntsiab lus ntawm ntau yam ntaub ntawv.Nws tseem muaj cov laminated lim ntsiab rau kev sib sib zog nqus pom. Tam sim no, laminated lim ntsiab yog lub ntsiab kev txhim kho. Laminated lim ntsiab tseem hu ua membrane stacks. Lub ntsiab yog 7 mus rau 20 txheej. Txhua txheej tuaj yeem muaj tib lub qhov pore loj, lossis cov txheej sib txawv tuaj yeem muaj qhov sib txawv ntawm qhov pore. Lub laminated microfiltration membrane muaj cov txiaj ntsig zoo rau kev sib sib zog nqus filtration sterilization thiab qhia meej txog cov tshuaj hauv Tshuag.
2. Ultrafiltration
Ultrafiltration membrane yog microporous filtration membrane nrog cov pore loj thiab ntsuas qhov pore hauv qab 0.01μm. Kev tsim nyog siab yog siv rau ntawm ib sab ntawm daim nyias nyias los tshuaj xyuas cov kuab tshuaj molecules me dua li qhov pore loj kom cais cov khoom uas muaj qhov hnyav molecular ntau dua 500 Dalton thiab qhov loj me dua 10 nm. Lub ultrafiltration membrane yog ib qho ntawm cov tsim tawm ntxov tshaj plaws polymer cais membranes. Cov khoom siv ultrafiltration tau ua haujlwm hauv xyoo 1960.
Nyob rau hauv cov txheej txheem biomedical, ultrafiltration yog dav siv rau cov concentration ntawm biomolecules thiab hloov cov system buffers. Muaj ntau cov khoom siv ultrafiltration. Cov neeg siv tuaj yeem xaiv cov khoom sib txawv raws li cov qauv sib txawv thiab kev ua tiav.
3. Nanofiltration
Nanofiltration yog lub siab-tsav membrane sib cais txheej txheem ntawm thim rov qab osmosis thiab ultrafiltration. Piv nrog rau lwm cov txheej txheem siab-tsav membrane sib cais, nws tshwm tom qab.
Kev sib cais nanofiltration yog ib hom tshiab ntawm kev sib cais membrane, thiab nws cov txheej txheem kev ua haujlwm zoo ib yam li cov tshuab sieving. Txawm li cas los xij, tus nanofiltration membrane raug them. Qhov no yog ib qho tseem ceeb vim li cas nws tseem muaj kev ua haujlwm siab desalination nyob rau hauv qis heev.
Nanofiltration membrane yog cov khoom siv nrog kev xaiv kev sib cais. Cov txheej txheem ntawm kev siv membrane xaiv cais kom paub qhov sib cais, purification thiab concentration ntawm cov khoom sib txawv ntawm cov kua pub yog hu ua membrane cais. Nws txawv ntawm ib txwm pom hauv daim nyias nyias nyias tuaj yeem sib cais ntawm qhov ntsuas molecular, thiab cov txheej txheem no yog cov txheej txheem ntawm lub cev uas tsis tas yuav hloov cov theem thiab cov khoom ntxiv. Nanofiltration yog tsuas yog siv rau cov concentration ntawm tsawg-molecular organic tshuaj xws li polypeptides.
4. Rov qab osmosis
Rov qab osmosis, tseem hu ua thim rov qab osmosis, yog ib qho kev sib cais membrane uas siv lub siab sib txawv raws li lub zog tsav los cais cov kuab tshuaj los ntawm kev daws. Vim hais tias nws yog opposite rau cov kev taw qhia ntawm ntuj infiltration, nws yog hu ua rov qab osmosis. Raws li qhov sib txawv osmotic pressures ntawm ntau yam ntaub ntawv, tib neeg tuaj yeem siv qhov rov qab osmosis siab dua li osmotic siab, uas yog, txoj kev rov qab osmosis, kom ua tiav lub hom phiaj ntawm kev sib cais, rho tawm, purification thiab concentration.
Rov qab osmosis yog dav siv nyob rau hauv kev npaj ntawm qhov chaw dej, dej ntshiab, dej distilled, thiab lwm yam .; wine manufacturing thiab dej txo; concentration, sib cais, purification thiab dej faib cov txheej txheem tshuaj; desalination ntawm boiler pub dej thiab lwm yam.
