Kev ziab kom qhuav yog ib txoj hauv kev zoo tshaj plaws rau khaws cov zaub mov, suav nrog cov txiv pos nphuab, los ntawm kev tshem lawv cov dej noo thaum khaws lawv cov qauv qub, tsw, thiab khoom noj muaj txiaj ntsig. Cov txheej txheem no suav nrog kev khov cov txiv pos nphuab thiab tom qab ntawd muab tso rau hauv lub tshuab nqus tsev, ua rau cov dej khov rau sublimate ncaj qha rau hauv vapor yam tsis dhau los ntawm cov kua theem. Qhov tshwm sim yog lub teeb yuag, qhuav khoom uas tuaj yeem khaws cia rau lub sijhawm ntev yam tsis muaj tub yees. Yog tias koj txaus siab rau khov-qhuav tag nrho cov txiv pos nphuab, ntawm no yog cov lus qhia dav dav uas npog cov txheej txheem, suav nrog kev kwv yees ntev npaum li cas nws yuav siv sijhawm.
Nkag siab txog Txoj Kev Ua Kom Qhuav Qhuav
Kev ziab kom qhuav, lossis lyophilization, suav nrog peb theem tseem ceeb: khov, thawj qhov ziab (sublimation), thiab ziab theem nrab (adsorption). Txhua theem plays lub luag haujlwm tseem ceeb hauv kev ua kom zoo thiab ua haujlwm ntev ntawm cov khoom qhuav.
Kev khov: Thawj kauj ruam yog kom khov cov txiv pos nphuab kom huv si. Qhov no feem ntau ua tiav ntawm qhov kub qis dua -30 degree (-22 degree F). Lub hom phiaj yog los xyuas kom meej tias tag nrho cov dej ntsiab lus hauv strawberries yog khov khov. Cov kauj ruam no yog ib qho tseem ceeb rau kev tswj cov txiv hmab txiv ntoo thiab cov qauv thaum lub sij hawm ziab.
Kev ziab thawj zaug (Sublimation): Hauv theem no, cov txiv pos nphuab khov tau raug rau lub tshuab nqus tsev, txo qhov siab kom tso cai rau cov dej khov rau sublimate ncaj qha rau hauv vapor. Cov txheej txheem no tshem tawm feem ntau ntawm cov dej ntsiab lus yam tsis hloov cov qauv kev ncaj ncees ntawm strawberries. Qhov kub ntawm lub sijhawm no yog ua tib zoo tswj kom ntseeg tau tias cov dej khov sublimates yam tsis muaj melting.
Secondary Drying (Adsorption): Cov theem kawg yuav tsum maj mam ua kom sov cov txiv pos nphuab kom tshem tawm cov dej molecules ntawm cov khoom. Cov kauj ruam no yog qhov tseem ceeb rau kev ua tiav cov khoom ruaj khov thiab qhuav uas tuaj yeem khaws cia rau lub sijhawm ntev.
Lub Sijhawm Teev Sijhawm rau Khov-Drying Whole Strawberries
Lub sijhawm tag nrho yuav tsum khov-qhuav tag nrho cov txiv pos nphuab tuaj yeem sib txawv raws li ntau yam, suav nrog qhov loj ntawm cov txiv pos nphuab, qhov ua tau zoo ntawm lub tshuab ziab khaub ncaws, thiab cov chaw tshwj xeeb (kub thiab siab) siv thaum lub sijhawm ua haujlwm. Txawm li cas los xij, kev kwv yees dav dav rau tag nrho cov txheej txheem tuaj yeem piav qhia raws li hauv qab no:
Lub sij hawm khov: 2-4 teev, los yog kom txog thaum khov tag.
Kev ziab thawj zaug (Sublimation) Sijhawm: 20-30 teev. Qhov no yog lub sijhawm siv sijhawm ntau tshaj plaws. Lub sijhawm tiag tiag yuav nyob ntawm qhov dej ntawm cov txiv pos nphuab thiab kev ua haujlwm ntawm lub tshuab ziab khaub ncaws khov.
Secondary Drying (Adsorption) Lub Sijhawm: 4-8 teev, kom paub meej tias tag nrho cov ya raws raug tshem tawm.
Nyob rau hauv tag nrho,freeze-drying tag nrho strawberriestuaj yeem siv nyob qhov twg los ntawm 26 mus rau 42 teev. Nws yog ib qho tseem ceeb kom nco ntsoov tias cov no yog cov sij hawm kwv yees thiab tuaj yeem sib txawv. Kev soj ntsuam cov txheej txheem thiab kho qhov chaw raws li cov txiv pos nphuab ziab kom qhuav yog qhov tseem ceeb heev.
Cov Tswv Yim rau Kev Ua Kom Zoo Kom Qhuav Kom Qhuav
Uniform Size: Sim xaiv cov txiv pos nphuab uas sib xws hauv qhov loj los txhawb kev ziab txawm tias qhuav.
Kev Kho Mob Ua Ntej : Qee tus neeg nyiam ua ntej kho cov txiv pos nphuab nrog cov kev daws teeb meem xws li kua txiv qaub los pab khaws cov xim thiab txhim kho tsw, txawm tias qhov no yog xaiv tau.
Nqus Efficiency: Xyuas kom koj lub tshuab ziab khaub ncaws lub tshuab nqus tsev twj tso kua mis zoo thiab ua haujlwm zoo, vim tias lub tshuab nqus tsev muaj zog yog qhov tseem ceeb rau kev ua haujlwm zoo sublimation.
Cia: Thaum khov-qhuav, khaws cov txiv pos nphuab hauv cov thawv ntim cua nrog cov pa oxygen absorbers kom ntev lawv lub txee lub neej.
Freeze-drying tag nrho strawberriesyog ib txoj hauv kev zoo los khaws lawv cov saj thiab cov khoom noj khoom haus rau kev khaws cia ntev. Thaum cov txheej txheem siv sijhawm, yuav tsum tau nyob qhov twg los ntawm 26 mus rau 42 teev, qhov tshwm sim yog ib qho khoom qab zib, khoom noj khoom haus uas khaws tau ntau yam ntawm cov txiv hmab txiv ntoo tshiab. Cov txheej txheem tsim nyog thiab kev ua siab ntev thaum lub sijhawm khov-qhuav yuav ua rau cov khoom lag luam yooj yim rau kev noj khoom txom ncauj, ci, lossis ntxiv rau cov nplej thiab lwm yam tais diav.
