{"id":8905,"date":"2014-03-18T09:00:55","date_gmt":"2014-03-18T14:00:55","guid":{"rendered":"https:\/\/www.insta-pro.com\/2014\/03\/18\/le-jatropha-de-lhuile-pour-les-biocarburants-et-du-tourteau-pour-nourrir-les-animaux-delevage-gestion-des-risques-aux-bons-endroits\/"},"modified":"2017-03-30T12:53:35","modified_gmt":"2017-03-30T17:53:35","slug":"le-jatropha-de-lhuile-pour-les-biocarburants-et-du-tourteau-pour-nourrir-les-animaux-delevage-gestion-des-risques-aux-bons-endroits","status":"publish","type":"post","link":"https:\/\/instapro.spinuhost.com\/fr\/blog\/nutrition-et-technologies\/le-jatropha-de-lhuile-pour-les-biocarburants-et-du-tourteau-pour-nourrir-les-animaux-delevage-gestion-des-risques-aux-bons-endroits\/","title":{"rendered":"Le jatropha, de l\u2019huile pour les biocarburants et du tourteau pour nourrir les animaux d\u2019\u00e9levage\u00a0&#8211; Gestion des risques aux bons endroits"},"content":{"rendered":"<p>&nbsp;<\/p>\n<p>La demande en gazole <a href=\"http:\/\/www.nbcnews.com\/business\/energy\/us-becoming-refiner-world-diesel-demand-grows-f6C10867716\">continue \u00e0 cro\u00eetre<\/a>. \u00a0Son prix est par cons\u00e9quent \u00e9lev\u00e9. \u00a0Cet effet est encore plus marqu\u00e9 dans les r\u00e9gions \u00e0 forte population, celles qui <a href=\"https:\/\/www.eere-pmc.energy.gov\/states\/Hawaii_Docs\/Current_State_HI_Energy.pdf\">montrent une grande d\u00e9pendance aux sources de p\u00e9trole \u00e9trang\u00e8res<\/a>, et les r\u00e9gions recul\u00e9es telles que les \u00eeles d\u2019<a href=\"http:\/\/en.wikipedia.org\/wiki\/Hawaii\">Hawaii<\/a>. \u00a0\u00c0 titre d\u2019exemple, vous pouvez comparer les prix du gazole \u00e0 <a href=\"http:\/\/www.hawaiigasprices.com\/index.aspx?fuel=D\">Hawaii<\/a> et dans l\u2019<a href=\"http:\/\/www.iowastategasprices.com\/index.aspx?fuel=D\">Iowa<\/a>.<\/p>\n<p>On rencontre des situations similaires en ce qui concerne l\u2019<a href=\"http:\/\/www.civilbeat.com\/articles\/2013\/10\/07\/20056-living-hawaii-where-milk-can-cost-as-much-as-wine\/\">alimentation<\/a> \u2013 un gallon (env. 3,8\u00a0L) de lait bio \u00e0 Hawaii co\u00fbte autant qu\u2019une bouteille de vin, et le lait non bio y vaut presque le double par rapport au m\u00eame volume dans la ville de New-York.\u00a0 Dans le m\u00eame ordre d\u2019id\u00e9es, Hawaii ne poss\u00e8de plus <a href=\"http:\/\/www.hawaiiforvisitors.com\/about\/dairy-farming.htm\">que deux exploitations de vaches laiti\u00e8res<\/a> sur les \u00eeles, qui d\u00e9pendent de l\u2019importation de divers ingr\u00e9dients pour la nourriture des animaux.\u00a0 La plus grande partie du lait provient de Californie.<\/p>\n<p>Les zones isol\u00e9es ayant une population importante, o\u00f9 il y a de la demande pour certains produits, repr\u00e9sentent des opportunit\u00e9s int\u00e9ressantes.\u00a0 Le <a href=\"http:\/\/en.wikipedia.org\/wiki\/Jatropha_curcas\">jatropha<\/a>, une plante \u00e0 fleurs originaire des tropiques (voir illustration ci-dessus), peut \u00eatre utile dans ce type de situations.\u00a0 Cette plante peut pousser dans des types de sols tr\u00e8s vari\u00e9s, et se d\u00e9velopper avec seulement 25\u00a0cm de pr\u00e9cipitations par an.\u00a0 En outre, le jatropha offre de hauts rendements au bout de 2-3\u00a0ans, et peut rester productif durant plusieurs d\u00e9cennies.\u00a0 La semence poss\u00e8de une haute teneur en huile (nous avons des donn\u00e9es indiquant une proportion de 39\u00a0% d\u2019huile), qui peut \u00eatre extraite et utilis\u00e9e pour la <a href=\"http:\/\/en.wikipedia.org\/wiki\/Jatropha_curcas#Biofuel\">production de biodiesel<\/a>.<\/p>\n<p>Apr\u00e8s l\u2019extraction d\u2019huile, le g\u00e2teau obtenu peut \u00eatre broy\u00e9 en tourteau pour nourrir les animaux d\u2019\u00e9levage.\u00a0 Il semble important d\u2019utiliser la vari\u00e9t\u00e9 non toxique de <a href=\"http:\/\/en.wikipedia.org\/wiki\/Papantla\">Papantla<\/a> (Mexique) dans ce but, car elle contient <a href=\"https:\/\/jatropha.uni-hohenheim.de\/uploads\/media\/Comparative_evaluation_of_non-toxic_and_toxic_varieties_of_jatropha_01.pdf\">naturellement peu d\u2019esters de phorbol toxiques<\/a>.\u00a0 Cependant, m\u00eame cette vari\u00e9t\u00e9 contient des antinutriments, tels qu\u2019<a href=\"https:\/\/jatropha.uni-hohenheim.de\/uploads\/media\/Comparative_evaluation_of_non-toxic_and_toxic_varieties_of_jatropha_01.pdf\">inhibiteurs de trypsines, lectines, et phytates<\/a>. \u00a0Donc, il semblerait qu\u2019un traitement thermique soit b\u00e9n\u00e9fique pour tout tourteau de jatropha donn\u00e9 aux animaux.\u00a0 Pourtant, une \u00e9tude portant sur l\u2019alimentation, effectu\u00e9e sur des rats, a permis de d\u00e9terminer que le tourteau de jatropha grill\u00e9 n\u2019\u00e9tait pas de qualit\u00e9 sup\u00e9rieure au tourteau non grill\u00e9, et l\u2019un comme l\u2019autre \u00e9taient de qualit\u00e9 inf\u00e9rieure au tourteau de soja (Panigrahi et al., 1984).\u00a0 Dans l\u2019\u00e9tude, le grillage (chauffage \u00e0 200\u00a0<sup>o<\/sup>C pendant 30\u00a0minutes) a r\u00e9duit la teneur en acides amin\u00e9s du tourteau de jatropha.\u00a0 Dans une <a href=\"http:\/\/ec.europa.eu\/research\/agriculture\/pdf\/events\/nutritional_studies_on_rats_and_fish_fed_diets_containing_unheated_and_heated_jatropha_curcas.pdf\">\u00e9tude plus r\u00e9cente<\/a>, le chauffage (121\u00a0<sup>o<\/sup>C) avec ajout d\u2019humidit\u00e9 pendant 15\u00a0minutes a r\u00e9duit les antinutriments, mais ceci n\u2019a que l\u00e9g\u00e8rement augment\u00e9 le taux de croissance des carpes d\u2019\u00e9levage (en comparaison avec le tourteau de jatropha non chauff\u00e9).\u00a0 Le chauffage pendant 45\u00a0minutes a r\u00e9duit les performances de croissance\u00a0; ceci est probablement d\u00fb \u00e0 une alt\u00e9ration des prot\u00e9ines, car les <a href=\"http:\/\/en.wikipedia.org\/wiki\/Protein_efficiency_ratio\">taux de rendement des prot\u00e9ines<\/a> ont diminu\u00e9.<\/p>\n<p>Il semblerait que l\u2019<a href=\"https:\/\/www.insta-pro.com\/products-services\/extruders.html\">extrusion \u00e0 sec<\/a> soit un choix plus judicieux pour la transformation du jatropha, non seulement pour nourrir les animaux d\u2019\u00e9levage, mais aussi pour l\u2019extraction d\u2019huile.\u00a0 L\u2019extrusion \u00e0 sec consiste en un traitement \u00e0 haute temp\u00e9rature sur une courte dur\u00e9e (quelques secondes) qui rompt les parois des cellules des plantes et permet de lib\u00e9rer ce qu\u2019elles contiennent (huile, prot\u00e9ines, et ainsi de suite).\u00a0 Elle a \u00e9t\u00e9 utilis\u00e9e pendant des dizaines d\u2019ann\u00e9es pour la transformation du soja, et elle permet l\u2019obtention de <a href=\"https:\/\/www.insta-pro.com\/fr\/2012\/12\/19\/impact-of-extrusion-on-nutrientspart1\/\">prot\u00e9ines<\/a> et d\u2019<a href=\"https:\/\/www.insta-pro.com\/fr\/2013\/09\/10\/all-energy-sources-are-not-created-equal\/\">huile<\/a> de haute qualit\u00e9, avec une <a href=\"http:\/\/www.allaboutfeed.net\/Nutrition\/Raw-Materials\/2007\/12\/Extruding-full-fat-soy-for-maximum-quality-AAF011248W\/\">quantit\u00e9 moindre d\u2019antinutriments<\/a>.\u00a0 Elle a \u00e9galement \u00e9t\u00e9 associ\u00e9e avec succ\u00e8s au <a href=\"https:\/\/www.insta-pro.com\/products-services\/presses.html\">pressage m\u00e9canique de l\u2019huile<\/a> pour extraire l\u2019huile de diverses cultures.<\/p>\n<p>L\u2019extrusion \u00e0 sec g\u00e9n\u00e8re de la chaleur uniquement gr\u00e2ce aux frottements (depuis l\u2019int\u00e9rieur de l\u2019extrudeuse), et peut \u00eatre utilis\u00e9e pratiquement n\u2019importe o\u00f9 dans le monde.\u00a0 De plus, les extrudeuses \u00e0 sec sont relativement peu on\u00e9reuses, faciles \u00e0 exploiter, et leur co\u00fbt d\u2019entretien est peu \u00e9lev\u00e9.\u00a0 Elles ne requi\u00e8rent pas de produits chimiques ni de solvants qui doivent \u00eatre stock\u00e9s et ensuite \u00e9limin\u00e9s, et avec les presses \u00e0 huile m\u00e9caniques qui extraient l\u2019huile, elles constituent un choix de transformation tr\u00e8s naturel.<\/p>\n<p>Les syst\u00e8mes de culture appropri\u00e9s, tels que le jatropha, en combinaison avec l\u2019extrusion \u00e0 sec et l\u2019extraction m\u00e9canique de l\u2019huile, peuvent donc se r\u00e9v\u00e9ler d\u2019excellents choix pour g\u00e9rer les risques li\u00e9s aux incertitudes concernant le carburant et la nourriture dans les r\u00e9gions du monde touch\u00e9es par ces probl\u00e8mes.\u00a0 Le groupe <a href=\"https:\/\/www.insta-pro.com\/fr\/2013\/11\/12\/why-extrusion-process-development-is-important\/\">R&amp;D<\/a> d\u2019<a href=\"https:\/\/www.insta-pro.com\/\">Insta-Pro International<\/a> serait heureux de collaborer avec des parties int\u00e9ress\u00e9es, comme nous le faisons d\u00e9j\u00e0 pour l\u2019extraction m\u00e9canique de l\u2019huile de jatropha \u00e0 l\u2019<a href=\"http:\/\/www.oceanicinstitute.org\/index3.html\">Oceanic Institute<\/a> \u00e0 Hawaii.\u00a0 Des accords mutuellement avantageux pourraient \u00eatre pass\u00e9s si, par exemple, des graines de jatropha (ou d\u2019une plante similaire, comme le <a href=\"http:\/\/www.biodieselmagazine.com\/articles\/8321\/terviva-bioenergy-works-to-bring-pongamia-oil-to-feedstock-market\">pongamia<\/a>) pouvaient \u00eatre envoy\u00e9es \u00e0 notre centre R&amp;D sur l\u2019extrusion-pressage d\u2019huile, en banlieue de Des Moines, dans l\u2019Iowa. \u00a0\u00a0Veuillez nous contacter pour que nous puissions en discuter.<\/p>\n<p><i>R\u00e9f\u00e9rence\u00a0:\u00a0<\/i>Panigrahi, S., B.J. Francis, L.A. Cano, et M.B. Burbage. 1984. Toxicity of Jatropha Curcas Seeds from Mexico to Rats and Mice. <i>Nutrition Reports International<\/i>. 29(5):1089<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; La demande en gazole continue \u00e0 cro\u00eetre. \u00a0Son prix est par cons\u00e9quent \u00e9lev\u00e9. \u00a0Cet effet est encore plus marqu\u00e9 dans les r\u00e9gions \u00e0 forte population, celles qui montrent une grande d\u00e9pendance aux sources de p\u00e9trole \u00e9trang\u00e8res, et les r\u00e9gions recul\u00e9es telles que les \u00eeles d\u2019Hawaii. \u00a0\u00c0 titre d\u2019exemple, vous pouvez comparer les prix du [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":11113,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7181],"tags":[856,858,712,8322],"class_list":["post-8905","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nutrition-et-technologies","tag-feed-fr","tag-livestock-fr","tag-biofuel-fr","tag-extrusion-a-sec-a-cisaillement-eleve"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.2 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Le jatropha, de l\u2019huile pour les biocarburants et du tourteau pour nourrir les animaux d\u2019\u00e9levage\u00a0- Gestion des<\/title>\n<meta name=\"description\" content=\"La demande en gazole continue \u00e0 cro\u00eetre. Son prix est par cons\u00e9quent \u00e9lev\u00e9.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/instapro.spinuhost.com\/fr\/blog\/nutrition-et-technologies\/le-jatropha-de-lhuile-pour-les-biocarburants-et-du-tourteau-pour-nourrir-les-animaux-delevage-gestion-des-risques-aux-bons-endroits\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le jatropha, de l\u2019huile pour les biocarburants et du tourteau pour nourrir les animaux d\u2019\u00e9levage\u00a0- Gestion des risques aux bons endroits\" \/>\n<meta property=\"og:description\" content=\"La demande en gazole continue \u00e0 cro\u00eetre. 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