II. Dab tsi yog biodegradable ice cream khob khob
Biodegradabledaim ntawv khob ice creammuaj degradability. Nws txo lub nra ntawm ib puag ncig. Nws tuaj yeem txo cov peev txheej pov tseg los ntawm microbial decomposition thiab rov ua dua tshiab. Lub khob ntawv no yog ib qho kev xaiv zoo thiab ib puag ncig zoo. Nws muab kev daws teeb meem ntau dua rau kev lag luam catering.
A. Kev txhais thiab yam ntxwv
Biodegradable ice cream khob khob yog cov thawv ntawv ua los ntawm cov khoom siv biodegradable. Nws dhau los ua cov txheej txheem degradation hauv ib puag ncig tsim nyog. Piv rau cov khob yas ib txwm siv, cov khob ntawv biodegradable muaj cov yam ntxwv hauv qab no:
1. Kev tiv thaiv ib puag ncig. PLA degradablekhob ice creamyog tsim los ntawm cov hmoov txhuv nplej siab. Yog li, nws tuaj yeem decompose nyob rau hauv ib puag ncig ntuj. Qhov no tuaj yeem txo cov pa phem rau ib puag ncig. Nws muaj txiaj ntsig zoo rau kev tiv thaiv lub ntiaj teb ib puag ncig.
2. Rov ua dua tshiab. PLA yog tsim los ntawm cov khoom siv txuas ntxiv dua tshiab, xws li cov hmoov txhuv nplej siab. Piv rau petrochemical plastics, cov txheej txheem tsim khoom ntawm PLA tau qis dua kev siv hluav taws xob thiab kev tso pa tawm hauv tsev cog khoom. Nws muaj kev sustainability zoo dua.
3. Pob tshab. PLA ntawv khob muaj pob tshab zoo. Qhov no tuaj yeem pom tseeb cov xim thiab cov tsos ntawm cov ice cream. Nws tuaj yeem txhim kho cov neeg siv khoom pom kev lom zem. Dhau li ntawd, cov khob ntawv tuaj yeem ua tus kheej thiab kho. Qhov no muab cov tub lag luam nrog ntau txoj hauv kev lag luam.
4. Thaum tshav kub kub tsis kam. PLA ntawv khob muaj kev ua haujlwm zoo. Nws tuaj yeem tiv taus cov zaub mov ntawm qhov kub thiab txias. Lub khob ntawv no zoo heev rau tuav cov khoom noj txias thiab kub xws li dej khov.
5. Lub teeb yuag thiab ruaj khov. PLA ntawv khob yog qhov hnyav thiab yooj yim nqa thiab siv. Lub caij no, PLA ntawv khob yog tsim los ntawm cov txheej txheem tshwj xeeb ntawm daim ntawv khob. Qhov no ua rau nws cov qauv ruaj khov thiab tsis tshua muaj deformation thiab tawg.
6. International ntawv pov thawj. PLA daim ntawv khob ua raws li cov qauv ntawv pov thawj thoob ntiaj teb ib puag ncig. Piv txwv li, European EN13432 biodegradation tus qauv thiab American ASTM D6400 biodegradation tus qauv. Nws muaj kev ruaj ntseg zoo.
B. Biodegradation txheej txheem ntawm degradable ntawv khob
Thaum PLA degradable ice cream khob raug muab pov tseg, cov hauv qab no yog cov ntsiab lus ntxaws ntawm lawv cov txheej txheem degradation:
Cov yam tseem ceeb uas ua rau PLA ntawv khob kom decompose nyob rau hauv ib puag ncig ntuj yog av noo thiab kub. Ntawm cov av noo thiab qhov kub thiab txias, lub khob ntawv yuav pib txheej txheem decomposition.
Thawj hom yog hydrolysis. Covkhob ntawvpib cov txheej txheem hydrolysis nyob rau hauv tus ntawm cov av noo. Cov dej noo thiab cov kab mob nkag mus rau hauv micropores thiab cov kab nrib pleb hauv lub khob ntawv thiab cuam tshuam nrog PLA molecules, ua rau muaj kev cuam tshuam decomposition.
Qhov thib ob hom yog enzymatic hydrolysis. Enzymes yog biochemical catalysts uas tuaj yeem ua kom cov tshuaj tiv thaiv decomposition. Enzymes tam sim no nyob rau hauv ib puag ncig tuaj yeem ua rau lub hydrolysis ntawm PLA khob khob. Nws tawg PLA polymers rau hauv me me molecules. Cov me me molecules yuav maj mam yaj nyob rau hauv ib puag ncig thiab ntxiv decompose.
Qhov thib peb yog microbial decomposition. PLA ntawv khob yog biodegradable vim muaj ntau cov kab mob uas tuaj yeem decompose PLA. Cov kab mob no yuav siv PLA ua lub zog thiab degrade nws mus rau carbon dioxide, dej, thiab biomass los ntawm kev lwj thiab decomposition.
Tus nqi degradation ntawm PLA ntawv khob nyob ntawm ntau yam. Xws li cov av noo, kub, av tej yam kev mob, thiab qhov loj thiab thickness ntawm daim ntawv khob.
Feem ntau hais lus, PLA daim ntawv khob yuav tsum tau siv sijhawm ntev dua los ua kom tiav tag nrho. Cov txheej txheem degradation ntawm PLA daim ntawv khob feem ntau tshwm sim hauv cov chaw tsim khoom siv hauv tsev lossis ib puag ncig tsim nyog. Ntawm lawv, tej yam kev mob rau cov av noo, kub, thiab microbial kev ua ub no. Hauv tsev neeg qhov chaw pov tseg lossis qhov chaw tsis zoo, nws qhov kev degradation yuav qeeb dua. Yog li, thaum tuav PLA daim ntawv khob, nws yuav tsum xyuas kom meej tias lawv tau muab tso rau hauv ib qho kev kho cov khib nyiab uas tsim nyog. Qhov no tuaj yeem muab cov txiaj ntsig zoo rau kev degradation.