{"id":472,"date":"2010-02-17T12:08:28","date_gmt":"2010-02-17T12:08:28","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/2010\/02\/17\/des-enzymes-assurant-la-decomposition-des-lignocelluloses-en-sucres-a-des-prix-acceptables\/"},"modified":"2012-07-12T12:08:49","modified_gmt":"2012-07-12T12:08:49","slug":"des-enzymes-assurant-la-decomposition-des-lignocelluloses-en-sucres-a-des-prix-acceptables","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2010\/02\/17\/des-enzymes-assurant-la-decomposition-des-lignocelluloses-en-sucres-a-des-prix-acceptables\/","title":{"rendered":"Des enzymes assurant la d\u00e9composition des ligno-celluloses en sucres \u00e0 des prix acceptables"},"content":{"rendered":"<p>La transformation de mat\u00e9riaux ligno-cellulosiques par voie enzymatique en \u00e9thanol qui n&#039;est pas encore devenu un proc\u00e9d\u00e9 industriel, est handicap\u00e9e par un double probl\u00e8me. Tout d&#039;abord par le prix des enzymes qui doivent assurer la transformation des mat\u00e9riaux cellulosiques mis en solutions aqueuses en sucres, puis par la faible concentration en alcool des jus obtenus apr\u00e8s fermentation. Par contre ce type de proc\u00e9d\u00e9 est susceptible de parfaitement s&#039;int\u00e9grer dans une usine de production d&#039;\u00e9thanol de premi\u00e8re g\u00e9n\u00e9ration, comme l&#039;envisage <strong><span>Poet<\/span><\/strong>, le premier producteur de bio\u00e9thanol des Etats-Unis, en introduisant dans ses usines une boucle de d\u00e9composition des rafles de ma\u00efs en sucres. Poet par cette voie (<a href=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/poet-fait-part-de-ses-bons-resultats-de-son-usine-pilote-de-conversion-des-rafles-de-mais-en-bioetha.html_.png\" title=\"Poet\">LIRE<\/a>)&#160;vise \u00e0 produire plus d&#039;\u00e9thanol (15% \u00e0 20% de plus) \u00e0 partir des cultures de ma\u00efs existantes qui alimentent ses usines et gr\u00e2ce \u00e0 un investissement marginal. L&#039;industriel avoue savoir se satisfaire des faibles concentrations des jus par des m\u00e9langes avec les solutions provenant du ma\u00efs. Il reste donc \u00e0 r\u00e9duire le prix des enzymes pour atteindre le seuil de rentabilit\u00e9 des op\u00e9rations, apr\u00e8s subventions. C&#039;est ce qu&#039;annonce <strong><span>Novozymes<\/span><\/strong> avec un nouveau type d&#039;enzyme le <strong><span>Cellic CTec 2<\/span><\/strong> qui devrait co\u00fbter au bouilleur de cru autour de 0.5 dollar par gallon d&#039;alcool. Ce r\u00e9sultat provient d&#039;un long travail de recherches et d&#039;optimisations de Novozymes sur le sujet (FIG.).<\/p>\n<p><a href=\"http:\/\/clabedan.typepad.com\/.a\/6a00d83451b18369e20120a8ab6d7a970b-pi\"><img decoding=\"async\" alt=\"Enzyme-cost-2\" class=\"asset asset-image at-xid-6a00d83451b18369e20120a8ab6d7a970b \" src=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e20120a8ab6d7a970b-450wi.png\" \/><\/a> <\/p>\n<p>Cette avanc\u00e9e \u00e9conomique fondamentale pour faire d\u00e9coller les proc\u00e9d\u00e9s d&#039;\u00e9laboration de biocarburants de deuxi\u00e8me g\u00e9n\u00e9ration sera concurrenc\u00e9e par d&#039;autres proc\u00e9d\u00e9s non enzymatiques, plus simples, de pyrolyse catalytique rapide (<a href=\"http:\/\/www.leblogenergie.com\/2009\/08\/comment-sy-retrouver-dans-les-divers-proc%C3%A9d%C3%A9s-conduisant-de-la-biomasse-%C3%A0-un-biocarburant.html\" title=\"pyrolyse catalytique rapide\">LIRE<\/a>) et s\u00fbrement mieux adapt\u00e9s \u00e0 des unit\u00e9s agricoles ou communales de valorisation des d\u00e9chets.<\/p>\n<p><a href=\"http:\/\/www.novozymes.com\/en\/MainStructure\/PressAndPublications\/PressRelease\/2010\/New+enzymes+turn+waste+into+fuel.htm\" target=\"_blank\" title=\"Novozymes\">LIRE<\/a> le communiqu\u00e9 de Novozymes.<\/p>\n<p>Le 17 F\u00e9vrier 2010<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La transformation de mat\u00e9riaux ligno-cellulosiques par voie enzymatique en \u00e9thanol qui n&#039;est pas encore devenu un proc\u00e9d\u00e9 industriel, est handicap\u00e9e par un double probl\u00e8me. Tout d&#039;abord par le prix des enzymes qui doivent assurer la transformation des mat\u00e9riaux cellulosiques mis en solutions aqueuses en sucres, puis par la faible concentration en alcool des jus obtenus [&hellip;]<\/p>\n","protected":false},"author":341,"featured_media":21697,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-472","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Des enzymes assurant la d\u00e9composition des ligno-celluloses en sucres \u00e0 des prix acceptables - leblogenergie.com<\/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:\/\/blogs.thesocialmedia.com\/leblogenergie\/2010\/02\/17\/des-enzymes-assurant-la-decomposition-des-lignocelluloses-en-sucres-a-des-prix-acceptables\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Des enzymes assurant la d\u00e9composition des ligno-celluloses en sucres \u00e0 des prix acceptables - leblogenergie.com\" \/>\n<meta name=\"twitter:description\" content=\"La transformation de mat\u00e9riaux ligno-cellulosiques par voie enzymatique en \u00e9thanol qui n&#039;est pas encore devenu un proc\u00e9d\u00e9 industriel, est handicap\u00e9e par un double probl\u00e8me. 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