Ultrafiltration ua haujlwm hom thiab nws daim ntawv thov
Sib txawv ntawm qhov pom zoo tib yam, ultrafiltration txais cov ntxeem tau asymmetric ultrafiltration membrane kom paub txog cov kua-kua sib cais ntawm qhov chaw ntawm daim nyias nyias. Hom kev pom yog hla ntws, uas yog, cov kua dej pub ntws mus rau qhov sib npaug ntawm daim nyias nyias. Ultrafiltration tuaj yeem muab faib ua kev ua haujlwm tsis tu ncua thiab ua haujlwm tsis tu ncua raws li hom kev ua haujlwm.
Kev ua haujlwm tsis sib xws
Raws li txoj kev ncig ntawm kev cuam tshuam cov kua, kev ua haujlwm tsis sib xws tau muab faib ua ob hom kev ua haujlwm: tag nrho cov kev cuam tshuam cov kua thiab ib nrab ncig ntawm cov kua dej. Nyob rau hauv cov txheej txheem ultrafiltration, thiaj li yuav txo tau cov concentration polarization thiab cov pa phem ntawm daim nyias nyias, lub siab pub kua dej txaus yuav tsum tau khaws cia rau hauv lub tank membrane. Yog li ntawd, ib tug loj tus naj npawb ntawm kev khiav dej num ntawm intercepted kua yuav tsum tau saws los tswj tus nqi siab. Tsis tas li ntawd, vim qhov me me permeation flux ntawm daim nyias nyias, cov kua pub kuj yuav tsum tau mus ncig ntawm daim nyias nyias rau ntau zaus kom ua tau raws li qhov xav tau ntawm cov concentration.
Intermittent ultrafiltration muaj qhov zoo ntawm kev xa tawm siab, kev ua haujlwm siab sib cais, kev ua haujlwm yooj yim, cov khoom siv me me thiab thaj tsam membrane, thiab tuaj yeem paub qhov ceev ceev ntawm cov khoom me me ntawm cov tshuaj. Yog li ntawd, nws yog qhov tsim nyog rau kev kuaj thiab kho cov khoom me me. Qhov tsis zoo ntawm kev sib cuam tshuam ultrafiltration yog qhov kev ua haujlwm me me, thaum lub peev xwm ua tiav ntawm kev ua kom tsis tu ncua ultrafiltration yog qhov loj, thiab lub sijhawm nyob ntawm cov kua dej ntawm daim nyias nyias yog luv, yog li qhov concentration ratio tsawg, yog li yuav tsum muaj qhov loj me me. .
Kev ua haujlwm tsis tu ncua
Cov teebmeem ntawm cov phaj txuas txuas ntxiv ultrafiltration thiab intermittent phaj ultrafiltration hauv kev pom thiab purification ntawm cephalosporin C fermentation broth tau muab piv. Nws tau pom tias tsis tu ncua phaj ultrafiltration muaj qhov zoo ntawm cov pa phem tsis zoo, yooj yim rov qab ntawm cov membrane flux tom qab ntxuav, zoo filtrate zoo thiab uniform filtrate unit.
Nruam ultrafiltration tuaj yeem muab faib ua ib theem thiab ntau theem raws li cov cuab yeej siv tshuab. Raws li txoj kev ncig ntawm cov kua dej intercepted, nws tuaj yeem muab faib ua cov tsis ncig thiab ib nrab ncig. Ntawm lawv, ib-theem ib nrab ncig thiab ntau theem ib nrab ncig yog dav siv hauv cov txheej txheem. Tus yam ntxwv ntawm ib-theem nruam ultrafiltration yog tias cov txheej txheem ultrafiltration yog ib txwm ua nyob rau hauv siab concentration, yog li cov permeability thiab rejection tus nqi yog tsawg. Txhawm rau kom kov yeej qhov tsis zoo no, kev ua haujlwm ntau theem txuas ntxiv feem ntau yog siv. Lub concentration ntawm circulating kua nyob rau hauv txhua seem ntawm multistage ultrafiltration nce nyob rau hauv lem, thiab cov concentrated kua yog coj tawm nyob rau hauv lub xeem seem. Yog li ntawd, cov kua dej pub rau hauv cov ntu dhau los tuaj yeem ua haujlwm ntawm qhov qis dua.
