{"id":1051,"date":"2017-10-12T15:10:07","date_gmt":"2017-10-12T13:10:07","guid":{"rendered":"https:\/\/buenavita.fr\/?p=1051"},"modified":"2017-10-12T15:12:49","modified_gmt":"2017-10-12T13:12:49","slug":"quest-ce-que-la-torrefaction","status":"publish","type":"post","link":"https:\/\/buenavita.fr\/boutique\/quest-ce-que-la-torrefaction\/","title":{"rendered":"Qu&rsquo;est-ce que la torr\u00e9faction ?"},"content":{"rendered":"<p>La torr\u00e9faction est utilis\u00e9e pour fabriquer des breuvages tels que le caf\u00e9, le cacao ou la bi\u00e8re. Elle consiste \u00e0 soumettre un aliment \u00e0 un feu vif pour en ressortir un fumet proche d\u2019une odeur\u00a0 carbonis\u00e9e ou grill\u00e9e. Dans le cas du caf\u00e9, la torr\u00e9faction vise \u00e0 transformer le grain de couleur verte en un grain de caf\u00e9 torr\u00e9fi\u00e9, et \u00e0 fixer les ar\u00f4mes.<\/p>\n<h2>Comment fonctionne la torr\u00e9faction ?<\/h2>\n<p>Dans un processus de torr\u00e9faction, on utilise du gaz ou du fioul comme source de chaleur.\u00a0 Le gaz \u00e9tant le plus recommand\u00e9, car malgr\u00e9 l\u2019absence d\u2019odeur d\u00e9gag\u00e9e par le fioul au moment o\u00f9 le br\u00fbleur est activ\u00e9, celui-ci transmet des senteurs d\u00e9plaisantes aux aliments d\u00e8s qu\u2019il y a un quelconque contact avec la poussi\u00e8re ou qu\u2019un dysfonctionnement survient.<\/p>\n<p>Lors de la cuisson, 3 r\u00e9actions chimiques peuvent subvenir :<\/p>\n<ul>\n<li>La r\u00e9action de Maillard, qui correspond \u00e0 l\u2019action des sucres sur les prot\u00e9ines. Elle est d\u00e9terminante pour le go\u00fbt de l\u2019aliment. Il est \u00e0 noter que les acrylamides, des compos\u00e9s organiques suspect\u00e9s d\u2019\u00eatre canc\u00e9rig\u00e8nes se r\u00e9put\u00e9s pour former lorsque se produit cette r\u00e9action. Cependant, les \u00e9tudes des chercheurs sur le caf\u00e9 au Br\u00e9sil n\u2019ont encore jamais pu confirmer ces dires.<\/li>\n<li>La caram\u00e9lisation, une technique consistant \u00e0 produire du caramel \u00e0 l\u2019aide du sucre contenu dans un aliment, afin qu\u2019il obtienne une couleur brune et un go\u00fbt rappelant la noix.<\/li>\n<li>La r\u00e9action de Strecker qui contribue surtout au changement de la pigmentation.<\/li>\n<\/ul>\n<h2>La torr\u00e9faction du caf\u00e9<\/h2>\n<p>Le grain vert, utilis\u00e9 dans la fabrication du caf\u00e9 ne comporte ni ar\u00f4me, ni go\u00fbt. Ce fut le peuple \u00c9thiopiens, au XIVe si\u00e8cle qui d\u00e9couvrit le processus de torr\u00e9faction.\u00a0 5 si\u00e8cles apr\u00e8s, plus pr\u00e9cis\u00e9ment en 1873, l\u2019am\u00e9ricain John Arbuckle commercialise le premier caf\u00e9 torr\u00e9fi\u00e9 en paquets, sous la marque ARIOSA.<\/p>\n<p>La torr\u00e9faction du caf\u00e9 se d\u00e9roule suivant 2 \u00e9tapes :<\/p>\n<ul>\n<li>La cuisson, au cours de laquelle se produit la torr\u00e9faction proprement dite. Il peut s\u2019agir d\u2019une torr\u00e9faction traditionnelle, prenant place dans un appareil appel\u00e9 torr\u00e9facteur. Ce grilloir, cylindrique ou circulaire, est \u00e9quip\u00e9 d\u2019un tambour chauffant, toujours en rotation, permettant ainsi aux grains d\u2019\u00eatre toujours en mouvement, de mani\u00e8re \u00e0 \u00eatre torr\u00e9fi\u00e9s de la m\u00eame fa\u00e7on. Un ma\u00eetre torr\u00e9facteur doit ici contr\u00f4ler constamment la cuisson pour garder une temp\u00e9rature incluse entre 180\u00b0C et 200\u00b0C.<br \/>\nIl existe \u00e9galement ce que l\u2019on appelle la torr\u00e9faction flash, un proc\u00e9d\u00e9 g\u00e9n\u00e9ralement appliqu\u00e9 par les industriels. Cette m\u00e9thode consistant \u00e0 d\u00e9gager de l\u2019air chaud \u00e0 700\u00b0C est enti\u00e8rement automatis\u00e9e.<\/li>\n<li>Le caf\u00e9 doit ensuite passer par le refroidissement afin de pr\u00e9venir le risque d\u2019un r\u00e9sultat plus fort que celui attendu. En effet, la cuisson du caf\u00e9 se poursuivrait si on ne le refroidissait pas une fois la torr\u00e9faction attendue obtenue. Le refroidissement peut se faire \u00e0 l\u2019air ou \u00e0 l\u2019eau.<\/li>\n<\/ul>\n<p>Le r\u00e9sultat peut varier d\u2019une torr\u00e9faction \u00e0 une autre :<\/p>\n<ul>\n<li>L\u00e9g\u00e8re : blonde ou New England<\/li>\n<li>Moyenne : ambr\u00e9e ou Am\u00e9ricain<\/li>\n<li>Moyennement pouss\u00e9e : robe de moine ou Light French<\/li>\n<li>Pouss\u00e9e : brune ou French<\/li>\n<li>Tr\u00e8s pouss\u00e9e : tr\u00e8s brune ou Dark French, aussi connu par Italian<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>La torr\u00e9faction est utilis\u00e9e pour fabriquer des breuvages tels que le caf\u00e9, le cacao ou la bi\u00e8re. Elle consiste \u00e0 soumettre un aliment \u00e0 un feu vif pour en ressortir un fumet proche d\u2019une odeur\u00a0 carbonis\u00e9e ou grill\u00e9e. Dans le cas du caf\u00e9, la torr\u00e9faction vise \u00e0 transformer le grain de couleur verte en un &hellip; <a href=\"https:\/\/buenavita.fr\/boutique\/quest-ce-que-la-torrefaction\/\" class=\"more-link\">Continuer la lecture<span class=\"screen-reader-text\"> de &laquo;&nbsp;Qu&rsquo;est-ce que la torr\u00e9faction ?&nbsp;&raquo;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":1053,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1,49],"tags":[],"class_list":["post-1051","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-les-actus"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Qu&#039;est-ce que la torr\u00e9faction ? - Buenavita<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/buenavita.fr\/boutique\/quest-ce-que-la-torrefaction\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Qu&#039;est-ce que la torr\u00e9faction ? - Buenavita\" \/>\n<meta property=\"og:description\" content=\"La torr\u00e9faction est utilis\u00e9e pour fabriquer des breuvages tels que le caf\u00e9, le cacao ou la bi\u00e8re. 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