{"id":3948,"date":"2024-06-26T09:00:00","date_gmt":"2024-06-26T01:00:00","guid":{"rendered":"https:\/\/globalquartztube.com\/?p=3948"},"modified":"2024-06-25T15:26:24","modified_gmt":"2024-06-25T07:26:24","slug":"seven-common-drying-methods-for-fruits-and-vegetables","status":"publish","type":"post","link":"https:\/\/globalquartztube.com\/hr\/seven-common-drying-methods-for-fruits-and-vegetables\/","title":{"rendered":"Uobi\u010dajene metode su\u0161enja vo\u0107a i povr\u0107a u industrijskoj proizvodnji i njihove prednosti i nedostaci"},"content":{"rendered":"

<\/p>\n\n\n\n

Uvod u sadr\u017eaj vode u vo\u0107u i povr\u0107u<\/strong><\/h2><\/div>\n\n\n\n

Voda je glavna komponenta svje\u017eeg vo\u0107a i povr\u0107a, \u010diji udio obi\u010dno varira od 70 do 95 posto. Voda u vo\u0107u i povr\u0107u postoji u tri razli\u010dita stanja: slobodna voda, koloidno vezana voda i kemijski vezana voda. Slobodna voda se kre\u0107e kroz kapilare i osmozom unutar vo\u0107a i povr\u0107a, ima ve\u0107u pokretljivost i lako se uklanja tijekom su\u0161enja. Dio koloidno vezane vode mo\u017ee se ukloniti tijekom su\u0161enja, dok se kemijski vezana voda op\u0107enito ne mo\u017ee ukloniti su\u0161enjem.<\/p>\n\n\n\n

Za\u0161to su\u0161imo vo\u0107e i povr\u0107e?<\/strong><\/h2><\/div>\n\n\n\n

Glavni razlog su\u0161enja vo\u0107a i povr\u0107a je sprje\u010davanje truljenja i produljenje roka trajanja. Princip je u tome da vezana voda, koju su\u0161enjem nije mogu\u0107e ukloniti, predstavlja ravnote\u017eni udio vlage u tkivu vo\u0107a ili povr\u0107a pod uvjetima su\u0161enja. Proces su\u0161enja dehidracijom pretvara vo\u0107e i povr\u0107e iz mokrog u suho stanje, uklanjaju\u0107i zna\u010dajnu koli\u010dinu slobodne vode i dio koloidno vezane vode. Kako se smanjuje unutarnji udio vlage, smanjuje se i vodena aktivnost, \u0161to usporava ili sprje\u010dava mikrobni rast i enzimsku aktivnost u vo\u0107u i povr\u0107u, \u010dime se produ\u017euje njihovo vrijeme \u010duvanja.<\/p>\n\n\n\n

Osnovni postupak su\u0161enja vo\u0107a i povr\u0107a<\/strong><\/h2><\/div>\n\n\n\n

Osnovni proces uklju\u010duje prijenos topline iz izvora topline na vo\u0107e i povr\u0107e, uzrokuju\u0107i kontinuiranu migraciju i povr\u0161insku evaporaciju vlage unutar tkiva i stanica, \u010dime se posti\u017ee u\u010dinak su\u0161enja. Dehidrirano vo\u0107e i povr\u0107e zadr\u017eava ve\u0107inu svojih hranjivih tvari, a unato\u010d nekim razlikama u okusu i izgledu u usporedbi sa svje\u017eim, njihova manja veli\u010dina, lak\u0161a te\u017eina i prakti\u010dnost pri transportu \u010dine ih popularnima me\u0111u potro\u0161a\u010dima.<\/p>\n\n\n\n

Uobi\u010dajene tehnike su\u0161enja<\/strong><\/h2><\/div>\n\n\n\n
    \n
  1. Solarno su\u0161enje<\/strong>Ovo je najstarija metoda su\u0161enja koja koristi solarnu energiju za su\u0161enje vo\u0107a i povr\u0107a. Vrlo je isplativa, budu\u0107i da zahtijeva samo ru\u010dno rezanje i postavljanje. Me\u0111utim, zbog sporog tempa su\u0161enja i zna\u010dajnih promjena u boji i izgledu proizvoda, nije pogodna za industrijsku masovnu proizvodnju, ve\u0107 je prikladnija za ku\u0107nu ili malu proizvodnju.<\/li>\n\n\n\n
  2. Su\u0161enje toplim zrakom<\/strong>Ova se tehnika naj\u010de\u0161\u0107e koristi zbog niske cijene i jednostavnosti rada. Koristi vru\u0107i zrak kao medij za su\u0161enje kako bi isparila povr\u0161insku vlagu i postupno prenijela vlagu iz unutra\u0161njosti na povr\u0161inu materijala. Kontinuirani porast povr\u0161inske temperature tijekom su\u0161enja stvara temperaturni gradient, koji mo\u017ee ometati migraciju vlage i usporiti proces su\u0161enja. Iako je su\u0161enje vru\u0107im zrakom u\u010dinkovito, mo\u017ee dovesti do promjena u boji vo\u0107a i povr\u0107a te gubitka unutarnjih hranjivih tvari, uz probleme poput dugih vremena su\u0161enja, niske energetske u\u010dinkovitosti i smanjene kvalitete proizvoda tijekom skladi\u0161tenja.<\/li>\n\n\n\n
  3. Su\u0161enje u mikrovalnoj pe\u0107nici<\/strong>: Ova tehnika uklju\u010duje orijentaciju i brzu oscilaciju polarnih molekula poput vode pod mikrovalnim elektromagnetskim poljem, stvaraju\u0107i zna\u010dajnu toplinu kroz interakcije sli\u010dne trenju. Mikrovalovi preferencijalno zagrijavaju molekule vode, omogu\u0107uju\u0107i vlagi da migrira iz unutra\u0161njosti prema vanj\u0161tini i zatim ispari, brzo posti\u017eu\u0107i su\u0161enje. Prednosti uklju\u010duju brze brzine su\u0161enja i istovremeno unutarnje i vanjsko su\u0161enje. Me\u0111utim, visoka potro\u0161nja energije po jedinici, zna\u010dajna po\u010detna ulaganja u opremu i potencijalni zdravstveni rizici od mikrovalnog zra\u010denja zna\u010dajni su nedostaci. Neke su zemlje ograni\u010dile grijanje hrane u mikrovalnim pe\u0107nicama zbog zabrinutosti za zdravlje.<\/li>\n\n\n\n
  4. Liofilizacija<\/strong>: Ova tehnika uklju\u010duje brzo smrzavanje vlage u materijalu u led, a zatim uklanjanje vode sublimacijom pod uvjetima visokog vakuuma na niskim temperaturama. Proizvodi liofilizirani zadr\u017eavaju oblik i unutarnju strukturu, nude\u0107i izvrsnu kvalitetu rehidracije i \u010duvaju\u0107i hranjive tvari, \u0161to ih \u010dini osobito prikladnima za su\u0161enje toplinski osjetljive i oksidabilne hrane. Unato\u010d proizvodnji visokokvalitetnih suhih proizvoda, liofilizacija je ograni\u010dena sporom brzinom, visokom potro\u0161njom energije po jedinici i znatnim ulaganjem u opremu, \u0161to je \u010dini manje izvedivom za mala i srednja poduze\u0107a.<\/li>\n\n\n\n
  5. Osmotsko su\u0161enje<\/strong>Ova tehnika uklju\u010duje uranjanje materijala u otopine poput \u0161e\u0107erne ili slane vode, koje uklanjaju vlagu osmozom. Osmotska dehidracija je brza i minimalno utje\u010de na strukturni integritet materijala, u\u010dinkovito \u010duvaju\u0107i izvornu stani\u010dnu strukturu, boju, okus i hranjive tvari, a istovremeno inhibira mikrobni rast i produ\u017euje rok trajanja. Ova se tehnika prvenstveno koristi za proizvodnju kandiranog vo\u0107a i ukiseljenog povr\u0107a.<\/li>\n\n\n\n
  6. Su\u0161enje toplinskom pumpom<\/strong>Ova tehnologija izvla\u010di toplinu iz izvora niske temperature i u\u010dinkovito je koristi na vi\u0161oj temperaturi. U posljednje vrijeme se tehnologija toplinskih pumpi sve vi\u0161e primjenjuje u su\u0161enju vodnih proizvoda, ljekovitog bilja i poljoprivrednih nusproizvoda. Njezini su principi sli\u010dni onima su\u0161enja toplim zrakom, ali s razli\u010ditim izvorima topline, nude\u0107i prednosti poput visokokvalitetnih su\u0161enih proizvoda, u\u0161tede energije i bez zaga\u0111enja.<\/li>\n\n\n\n
  7. Infracrveno su\u0161enje<\/strong>Infracrveno zra\u010denje izravno zagrijava molekule vode u materijalu, uzrokuju\u0107i porast temperature i isparavanje vlage, \u010dime se posti\u017ee dehidracija. Princip se temelji na difuziji vlage iz unutra\u0161njosti vo\u0107a ili povr\u0107a na njihovu povr\u0161inu, gdje ona isparava u okolni prostor. Infracrveni zraci mogu prodrijeti do odre\u0111ene dubine u vo\u0107e i povr\u0107e.<\/li>\n<\/ol>\n\n\n\n

    Istra\u017eite inovativna rje\u0161enja za su\u0161enje s Global Quartz Tube. Za vi\u0161e informacija posjetite na\u0161u web stranica<\/a> ili nam po\u0161aljite e-po\u0161tu na contact@globalquartztube.com<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

    Introduction to Water Content in Fruits and Vegetables Water is the main component of fresh fruits and vegetables, typically ranging from 70% to 95% in content. Water in fruits and vegetables exists in three different states: free water, colloidal-bound water, and chemically-bound water. Free water moves through the capillaries and by osmosis within the fruits […]<\/p>\n","protected":false},"author":3,"featured_media":3953,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Seven Common Drying Methods for Fruits and Vegetables","_seopress_titles_desc":"Explore seven common drying methods for fruits and vegetables, each with unique benefits and limitations, ideal for extending shelf life and preserving nutrients.","_seopress_robots_index":"","_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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Water in fruits and vegetables exists in three different states: free water, colloidal-bound water, and chemically-bound water. Free water moves through the capillaries and by osmosis within the fruits…","authors":[{"term_id":13,"user_id":3,"is_guest":0,"slug":"casper-peng","display_name":"Peng, Casper","avatar_url":{"url":"https:\/\/globalquartztube.com\/wp-content\/uploads\/2024\/06\/Casper-Peng.webp","url2x":"https:\/\/globalquartztube.com\/wp-content\/uploads\/2024\/06\/Casper-Peng.webp"},"0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":""}],"_links":{"self":[{"href":"https:\/\/globalquartztube.com\/hr\/wp-json\/wp\/v2\/posts\/3948","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/globalquartztube.com\/hr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/globalquartztube.com\/hr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/globalquartztube.com\/hr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/globalquartztube.com\/hr\/wp-json\/wp\/v2\/comments?post=3948"}],"version-history":[{"count":2,"href":"https:\/\/globalquartztube.com\/hr\/wp-json\/wp\/v2\/posts\/3948\/revisions"}],"predecessor-version":[{"id":3952,"href":"https:\/\/globalquartztube.com\/hr\/wp-json\/wp\/v2\/posts\/3948\/revisions\/3952"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/globalquartztube.com\/hr\/wp-json\/wp\/v2\/media\/3953"}],"wp:attachment":[{"href":"https:\/\/globalquartztube.com\/hr\/wp-json\/wp\/v2\/media?parent=3948"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/globalquartztube.com\/hr\/wp-json\/wp\/v2\/categories?post=3948"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/globalquartztube.com\/hr\/wp-json\/wp\/v2\/tags?post=3948"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/globalquartztube.com\/hr\/wp-json\/wp\/v2\/ppma_author?post=3948"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}