{"id":116590,"date":"2014-05-11T00:00:00","date_gmt":"2014-05-11T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/freeze-concentration-of-cofee-extractstudy-of-block-and-fallling-film-techniques\/"},"modified":"2014-05-11T00:00:00","modified_gmt":"2014-05-11T00:00:00","slug":"freeze-concentration-of-cofee-extractstudy-of-block-and-fallling-film-techniques","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/inteligencia-artificial\/freeze-concentration-of-cofee-extractstudy-of-block-and-fallling-film-techniques\/","title":{"rendered":"Freeze concentration of cofee extract:study of block and fallling-film techniques"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Fabian Leonardo Moreno Moreno <\/strong><\/h2>\n<p>El caf\u00e9 es el al\u00edmento m\u00e1s comercializado en el mundo y por esto es alta su importancia econ\u00f3mica ysocial. En la industria del caf\u00e9, la calidad sensorial yfuncional de la bebida es un par\u00e1metro de alta importancia, por lo cual se promueve el uso de tecnolog\u00edas de proceso que permitan su preservaci\u00f3n. En el proceso de obtenci\u00f3n de caf\u00e9 soluble liofilizado se utiliza fa crioconcentraci\u00f3n como una etapa para la eliminaci\u00f3n parcial del agua del extracto. la crioconcentraci\u00f3n es una tecnolog\u00eda para la eliminaci\u00f3n de agua de soluciones mediante su enfriamiento hasta la formaci\u00f3n yseparaci\u00f3n de cristales de hielo. Es una t\u00e9cnica que puede preservar la calidad del producto debido a las bajas temperaturas que maneja. existen tres t\u00e9cnicas de crioconcentraci\u00f3n: suspensi\u00f3n, pel\u00edcula y bloque. La \u00fanica t\u00e9cnica disponible comercialmente a nivel mundial es la crioconcentraci\u00f3n en suspensi\u00f3n. Esta es una t\u00e9cnica que logra altas eficiencias de separaci\u00f3n pero es relativamente costosa, por lo cual se busca el desarrollo de t\u00e9cnicas m\u00e1s simples que a la vez consigan una alta eficiencia en la separaci\u00f3n. La crioconcentraci\u00f3n en pel\u00edcula descendente yen bloque se muestran como alternativas yen los \u00faltimos a\u00f1os se ha incrementado las investigaciones en estas t\u00e9cnicas. en el presente proyecto se estudi\u00f3 la crioconcentraci\u00f3n en bloque total yen pel\u00edcula descendente para la obtenci\u00f3n de extractos concentrados de caf\u00e9. Se realiz\u00f3 el dise\u00f1\u00f3 de una unidad de estudios para la crioconentraci\u00f3n. Igualmente, se estableci\u00f3 el efecto de las variables operativas de la crioconcentraci\u00f3n en bloque yen pel\u00edcula sobre la eficiencia de la separaci\u00f3n yse demostr\u00f3 la preservaci\u00f3n de los componentes bioactivos, la preservaci\u00f3n de los componentes vol\u00e1tiles y de la calidad sensorial del extracto de caf\u00e9. Se obtuvieron modelos matem\u00e1ticos para la predicci\u00f3n del coeficiente de distribuci\u00f3n en el hielo que permite predecir el comportamiento de la crioconcentraci\u00f3n. Finalmente, se propuso una estrategia operativa para integraci\u00f3n de las t\u00e9cnicas estudiadas que permite obtener eficiencias de separaci\u00f3n acordes con los est\u00e1ndares industriales. el proyecto se desarroll\u00f3 bajo la modalidad de cotutela \u00c2\u00b7de tesis doctoral en forma conjunta entre el doctorado en biociencias de la universidad de la sabana en bogot\u00e1, colombia yel doctorado en tecnolog\u00eda agroalimentaria y biotecnolog\u00eda de la universidad polit\u00e9cnica.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Freeze concentration of cofee extract:study of block and fallling-film techniques<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Freeze concentration of cofee extract:study of block and fallling-film techniques <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Fabian Leonardo Moreno Moreno <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de catalunya<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 05\/11\/2014<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Merc\u00e9 Ravent\u00f3s Santamaria<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Antonio Mulet pons <\/li>\n<li>Carlos eduardo Orrego alzate (vocal)<\/li>\n<li>  (vocal)<\/li>\n<li>  (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Fabian Leonardo Moreno Moreno El caf\u00e9 es el al\u00edmento m\u00e1s comercializado en el mundo y por esto [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","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":"","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":"default","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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