Kusefedwa kwa mowa womwe umapangidwa ndi polyvinylidene fluoride membrane ndi zotsatira za mabakiteriya osefera

Mowa wothira mowa, womwe umadziwikanso kuti mowa wopangira mowa, ndi mtundu wa mowa wosasefedwa komanso wodzaza ndi aseptic popanda pasteurization kapena kutentha kwambiri nthawi yomweyo mankhwala ophera tizilombo.Lili olemera amino zidulo, chakudya, mchere mchere, zosiyanasiyana mavitamini ndi zosiyanasiyana michere yogwira, amene angathe kukulitsa chilakolako ndi kulimbikitsa chimbudzi.

Mowa wosakonzekera ndi wa mowa wapamwamba kwambiri.Kusefera ndi kutsekereza ndiye njira yayikulu yopangira.Ukadaulo wolekanitsa ma membrane amatha kusunga mitundu yonse yazakudya muzakudya pogwiritsa ntchito mfundo yowunikira.Mukagwiritsidwa ntchito popanga mowa wopangira mowa, mowa womwe umapangidwa umamveka bwino komanso wowoneka bwino, kusungidwa kwa thovu kumakhala kotalikirapo, ndipo cholozera chodziwika bwino cha protein ndi ozizira turbidity index ndi chotsika kuposa 30% kuposa kusefera kwa chikwi.Komabe, kuipitsidwa kosalephereka kwa nembanemba kumakhudza kwambiri kusefera, ndipo kukhazikika kwapakatikati kumakhala pafupifupi 10L/(m²/h), zomwe zimalepheretsa kugwiritsa ntchito ukadaulo wazosefera wa membrane popanga mowa.

Sankhani hydrophilic PVDF nembanemba kusefera kukonzekera mowa, anaphunzira PVDF microfiltration nembanemba kusefera mabakiteriya a escherichia coli mabakiteriya kuyimitsidwa ntchito ndi dongosolo nembanemba, nembanemba kabowo, ubwenzi pakati pa nyumba ziwiri anaunika microfiltration nembanemba ayenera kugwiritsidwa ntchito kusefera yotseketsa zotsatira za kusanja mowa kusefera, Kusintha kwa membrane flux ndi njira zosiyanasiyana za qing kutsuka kutsukidwa, ndi zina zotero, zimapereka chidziwitso kuti zigwiritsidwe ntchito.

Njira yoyesera

Kugawa kakulidwe ka pore kwa nembanemba ya PVDF kudatsimikiziridwa ndi choyesa chodzipangira chokha - velocity njira pore size distribution tester.Chidutswa chozungulira chozungulira chimadulidwa mufilimu yowuma, yoviikidwa mumadzi oviika chikwi chikwi mpaka kuwoneka, kuchotsedwa ndikuwumitsidwa ndi pepala losefera, ndiyeno kufalikira pa chowunikira kuti chizindikirike.Njira yothirira inali isopropanol, ndipo gwero lamphamvu linali nayitrogeni.

Kuti muyezedwe ndi Engle, 2cmx2cm lalikulu diaphragm idadulidwa, kukhazikitsidwa pa slide, ndikuyikidwa patebulo lachitsanzo kuti liwoneke.The kukhudzana Ngodya madzi m'malovu kuchokera pamwamba pa filimuyo kutha kwathunthu linalembedwa.

Mawonekedwe apamwamba ndi apansi a zitsanzo za filimu yoyimilira anaphatikizidwa ku tebulo lachitsanzo ndi zomatira zoyendetsera motsatira.Magawo a mtanda adawumitsidwa ndikuzimitsidwa ndi nayitrogeni wamadzimadzi, ndipo magawo a mtanda adalumikizidwa patebulo lachitsanzo ndi zomatira za conductive.Zitsanzozo zinatsekeredwa mu vacuum ndikuyikidwa pa nsanja ya electron microscope kuti awonedwe.

Kuwerengera kwa tizilombo E. coli: Tengani chitsanzo kuti muyesedwe, tchulani GB4789.3-2010 kuti muyesedwe.Chiwerengero chonse cha mowa wopangira mowa: Zitsanzo za mowa zidatengedwa musanasefedwe komanso pambuyo pake ndikuyesedwa molingana ndi GB4789.2-2010.Kuwerengera kwa yisiti: Tengani zitsanzo za mowa musanasefe komanso mutatha, tchulani GB4789.15