Kom Tsis Muaj Menyuam, Pasteurization, Ultra-pasteurization: Dab Tsi?

Cov txheej txheem:

Kom Tsis Muaj Menyuam, Pasteurization, Ultra-pasteurization: Dab Tsi?
Kom Tsis Muaj Menyuam, Pasteurization, Ultra-pasteurization: Dab Tsi?

Video: Kom Tsis Muaj Menyuam, Pasteurization, Ultra-pasteurization: Dab Tsi?

Video: Kom Tsis Muaj Menyuam, Pasteurization, Ultra-pasteurization: Dab Tsi?
Video: Lec 4 : Milk pasteurization 2024, Hlis ntuj nqeg
Anonim

Kev ua kom tsis taus, pasteurization thiab ultra-pasteurization yog cov txheej txheem ntawm kev ua cov khoom siv thermal. Nrog lawv cov kev pab, lawv txuas lub txee lub neej thiab rhuav tshem cov kab mob, tej zaum pom hauv cov zaub mov.

Kom tsis muaj menyuam, pasteurization, ultra-pasteurization: dab tsi?
Kom tsis muaj menyuam, pasteurization, ultra-pasteurization: dab tsi?

Ultrapaterization, pasteurization thiab sterilization yog cov txheej txheem thev naus laus zis uas tsim los tshem cov zaub mov ntawm cov muaj cov kab mob, thiab ntxiv kom ntev lub txee lub neej kom ntau li ntau tau. Thaum lub sijhawm ua tiav, cov khoom lag luam tau muab rhaub kom sib txawv raws qib.

Lub npe hu ua "zaub mov kom tsis muaj menyuam" yog dab tsi?

Feem ntau siv cov mis los ua siav. Hauv qhov no, mis nyuj yog rhuab mus rau kub txog 120-150jC rau 30 feeb. Xws li cov nyhuv txav tag nrho cov kab mob me me uas muaj nyob hauv mis.

Hmoov tsis zoo, nrog rau pathogens, muaj txiaj ntsig cov kab mob lactic acid kuj tuag taus. Yog li, cov kua mis kom tsis muaj menyuam tsis haum rau kev npaj cov kua mis nyeem qaub thiab lwm yam khoom siv lactic acid. Thaum cov mis nyuj sterilized hloov qaub, nws yuav siv qhov tseeb saj iab. Tus nqi noj zaub mov ntawm cov khoom tseem yog tsawg heev. Tab sis mis tsis muaj menyuam yaus tuaj yeem khaws cia ib xyoos.

Dab tsi yog pasteurization?

Thaum lub sij hawm pasteurization, maj mam kub tsoom fwv yog siv. Cov mis yog rhuab rau 65jC rau 30 feeb lossis li 15-40 feeb ntawm qhov kub ntawm 75jC. Yog tias ntsuas qhov ntsuas kub ntawm 85jC siv, lub sijhawm ua tiav yog txo mus rau 8-10 vib nas this. Cov kev kho mob no ua rau cov kab mob pathogenic, tab sis qhov tseeb tsis cuam tshuam rau kev ua haujlwm tseem ceeb ntawm cov kab mob tiv thaiv tshav kub lactic acid. Cov neeg quav yeeb niaj hnub rhuav tshem txog li ntawm 98% ntawm cov kab mob tuag uas tsis haum.

Lub txee lub neej ntawm pasteurized mis tsis tshaj 2 lub lis piam, tom qab uas nws hloov qaub. Xws li cov khoom lag luam khaws tau cov khoom noj kom zoo rau lub cev thiab siv tau los npaj cov khoom noj muaj kua mis.

Niaj hnub no, ultra-pasteurization feem ntau siv rau kev kho cua sov, ib qho txheej txheem thaum lub sijhawm cov mis nyuj tau ua kom sov li 3-4 seconds ntawm qhov kub txog 135oC. Tom qab ntawd, cov mis nyuj yog maj mam txias kom txog 4-5jC thiab hliv rau hauv cov khoom tsis muaj hau. Lub txee lub neej ntawm mis nyob rau hauv cov ntaub ntawv no yog 2 hlis.

Lub sijhawm npau ntev ntev yuav luag txhua cov vitamins, suav nrog cov vitamin C. Txawm li cas los xij, nws raug nquahu kom tsis txhob haus cov mis nyoos uas tsis tau hais ua ntej. Yog tias cov kua mis tsis tau npaj rau kev khaws cia ntev ntev, nws zoo dua los yuav cov khoom lag luam uas tau ua tiav tom qab thiab cov kua mis-pasteurization.

Pom zoo: