{"id":19767,"date":"2011-01-17T23:04:45","date_gmt":"2011-01-17T23:04:45","guid":{"rendered":"https:\/\/www.institutodeengenharia.org.br\/?p=19767"},"modified":"2011-01-17T14:46:51","modified_gmt":"2011-01-17T14:46:51","slug":"pais-estuda-combustivel-de-microalga","status":"publish","type":"post","link":"https:\/\/www.institutodeengenharia.org.br\/site\/2011\/01\/17\/pais-estuda-combustivel-de-microalga\/","title":{"rendered":"Pa\u00eds estuda combust\u00edvel de microalga"},"content":{"rendered":"

Cientistas brasileiros ingressaram na corrida para tornar economicamente vi\u00e1vel a produ\u00e7\u00e3o de combust\u00edvel extra\u00eddo de algas microsc\u00f3picas. Na opini\u00e3o dos pesquisadores, recursos escassos e equipes que atuam de forma solit\u00e1ria ainda constituem obst\u00e1culos para avan\u00e7os na \u00e1rea. <\/p>\n

O desafio \u00e9 imenso. S\u00f3 n\u00e3o supera as promessas. De todas as fontes de biocombust\u00edveis, nenhuma oferece produtividade t\u00e3o grande. Das plantas superiores – com raiz, tronco e folhas -, a melhor op\u00e7\u00e3o para produ\u00e7\u00e3o de \u00f3leo – e, depois, biodiesel – \u00e9 o dend\u00ea: cada hectare produz 4.400 litros por ano. Algumas microalgas produzem at\u00e9 90 mil litros em id\u00eantica \u00e1rea e no mesmo per\u00edodo: 20 vezes mais. <\/p>\n

E as vantagens n\u00e3o terminam a\u00ed. H\u00e1 microalgas que apreciam \u00e1guas salobras ou \u00e1guas com res\u00edduos. O uso de tais microrganismos aliviaria a demanda por \u00e1gua doce e limpa, que costuma ser alta em culturas convencionais para produ\u00e7\u00e3o de biocombust\u00edveis, como soja e cana. <\/p>\n

Al\u00e9m disso, regi\u00f5es como o semi\u00e1rido brasileiro poderiam encontrar sua voca\u00e7\u00e3o econ\u00f4mica com fazendas de microalgas. N\u00e3o haveria desperd\u00edcio de solo – pouco produtivo na regi\u00e3o – e haveria luz de sobra para a fotoss\u00edntese das algas. O len\u00e7ol fre\u00e1tico de \u00e1gua salobra forneceria o meio de cultivo. Por fim, as microalgas s\u00e3o \u00f3timos fixadores de carbono, contribuindo para atenuar o aquecimento global. <\/p>\n

Contudo, os problemas come\u00e7am cedo. Pouca gente aposta que a alternativa se tornar\u00e1 vi\u00e1vel em menos de uma d\u00e9cada. H\u00e1 in\u00fameros desafios t\u00e9cnicos: otimiza\u00e7\u00e3o de fotobiorreatores – onde as algas s\u00e3o cultivadas -, desenvolvimento de processos baratos para separar microrganismos da \u00e1gua, identifica\u00e7\u00e3o de esp\u00e9cies promissoras para cultivo. E com o barril do petr\u00f3leo custando menos que R$ 150, \u00e9 dif\u00edcil tornar vi\u00e1veis economicamente fontes alternativas de energia, o que retarda de forma significativa a pesquisa.<\/p>\n

Autor: Ag\u00eancia Estado<\/b><\/p>\n","protected":false},"excerpt":{"rendered":"

Cientistas brasileiros ingressaram na corrida para tornar economicamente vi\u00e1vel a produ\u00e7\u00e3o de combust\u00edvel extra\u00eddo de algas microsc\u00f3picas. Na opini\u00e3o dos pesquisadores, recursos escassos e equipes que atuam de forma solit\u00e1ria ainda constituem obst\u00e1culos para avan\u00e7os na \u00e1rea. O desafio \u00e9 imenso. S\u00f3 n\u00e3o supera as promessas. De todas as fontes de biocombust\u00edveis, nenhuma oferece produtividade […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24,6],"tags":[],"class_list":{"0":"post-19767","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-energia","7":"category-noticias"},"yoast_head":"\nPa\u00eds estuda combust\u00edvel de microalga - Instituto de Engenharia<\/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:\/\/www.institutodeengenharia.org.br\/site\/2011\/01\/17\/pais-estuda-combustivel-de-microalga\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pa\u00eds estuda combust\u00edvel de microalga - Instituto de Engenharia\" \/>\n<meta property=\"og:description\" content=\"Cientistas brasileiros ingressaram na corrida para tornar economicamente vi\u00e1vel a produ\u00e7\u00e3o de combust\u00edvel extra\u00eddo de algas microsc\u00f3picas. Na opini\u00e3o dos pesquisadores, recursos escassos e equipes que atuam de forma solit\u00e1ria ainda constituem obst\u00e1culos para avan\u00e7os na \u00e1rea. O desafio \u00e9 imenso. S\u00f3 n\u00e3o supera as promessas. 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