Kev lim dej ntawm cov npias nrog polyvinylidene fluoride membrane thiab cov nyhuv ntawm cov kab mob pom

Draft npias, tseem hu ua cua npias, yog ib hom aseptic lim thiab aseptic filling npias yam tsis muaj pasteurization lossis kub kub instantaneous tua kab mob.Nws muaj cov nplua nuj amino acids, carbohydrates, inorganic ntsev, ntau yam vitamins thiab ntau yam enzymes, uas tuaj yeem txhim kho qab los noj mov thiab txhawb kev zom zaub mov.

Draft npias belongs rau qib siab ntawm npias.Lim thiab sterilization yog qhov txuas tseem ceeb ntawm kev tsim khoom.Membrane sib cais tshuab tuaj yeem khaws txhua yam khoom noj hauv cov zaub mov los ntawm kev siv txoj cai tshuaj ntsuam xyuas.Thaum siv rau kev tsim cov npias npias, cov cawv uas tsim tawm yog qhov tseeb thiab pob tshab, cov npuas khaws cia ntev dua, thiab cov protein rhiab thiab txias turbidity Performance index yog ntau dua 30% qis dua qhov pom ntawm lub ntiaj teb txhiab.Txawm li cas los xij, qhov tsis muaj kuab paug tsis zoo cuam tshuam rau kev pom kev ua haujlwm, thiab qhov sib npaug ntawm cov txheej txheem ruaj khov tsuas yog kwv yees li 10L / (m² / h), uas txwv tsis pub siv cov tshuab lim membrane hauv kev tsim npias.

Xaiv hydrophilic PVDF membrane filtration npias, kawm txog PVDF microfiltration membrane filtration lim cov kab mob ntawm escherichia coli cov kab mob ncua kev kawm ntawv thiab membrane qauv, membrane aperture, kev sib raug zoo ntawm ob tug qauv tau soj ntsuam microfiltration membranes yuav tsum tau siv rau filtration sterilization nyhuv ntawm cov ntaub ntawv npias pom, membrane flux hloov thiab ntau txoj kev ntawm qing ntxuav tu nyhuv, thiab hais txog, muab ib tug siv rau daim ntawv thov ntxiv.

Txoj kev sim

Qhov pore loj faib ntawm PVDF membrane tau txiav txim siab los ntawm tus kheej ua npuas taw tes - txoj kev tshaj tawm qhov pore loj faib tester.Lub voj voog diaphragm raug txiav tawm ntawm cov zaj duab xis qhuav, soaked nyob rau hauv ib txhiab ntawm cov kua dej kom txog thaum translucent, tshem tawm thiab qhuav nrog cov ntawv lim, thiab tom qab ntawd kis tau rau ntawm lub tshuab kuaj xyuas kom pom.Qhov kev daws teeb meem yog isopropanol, thiab qhov chaw siab yog nitrogen.

Rau kev sib cuag lub kaum sab xis ntsuas, 2cmx2cm square diaphragm raug txiav, tsau rau ntawm tus swb, thiab muab tso rau ntawm lub rooj coj mus kuaj.Lub kaum sab xis ntawm cov dej ntws los ntawm qhov chaw ntawm zaj duab xis kom ploj tag.

Lub sab sauv thiab sab qis ntawm tus neeg sawv cev zaj duab xis qauv tau txuas rau lub rooj qauv nrog cov nplaum nplaum raws li.Cov ntu ntoo khaub lig tau khov thiab quenched nrog kua nitrogen, thiab cov ntu ntoo khaub lig tau txuas rau lub rooj qauv nrog cov nplaum nplaum.Cov qauv raug kaw hauv lub tshuab nqus tsev thiab muab tso rau ntawm lub tshuab hluav taws xob tshuab hluav taws xob rau kev soj ntsuam.

Microbial suav E. coli suav: Nqa cov qauv mus kuaj, xa mus rau GB4789.3-2010 rau kev kuaj.Tag nrho cov colony suav ntawm cov ntawv npias: Cov qauv npias tau coj ua ntej thiab tom qab pom thiab kuaj raws li GB4789.2-2010.Cov poov xab suav: Siv cov qauv npias ua ntej thiab tom qab pom, xa mus rau GB4789.15