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Le riz nourrit… et génère de l'élecricité !

Article publié le 4 janvier 2010

Les biocarburants font feu de tout bois... et des cosses qui entourent les grains de riz. Un déchet massif dans les agricultures asiatiques qui permettrait d’alimenter et de chauffer les foyers des zones rurales environnantes.

Le riz nourrit… et génère de l'élecricité !

Dans la série des produits agricoles utiles et capables d'être transformé en carburants, nous avions déjà traité du café, de la pastèque, de l’urine, du bois mort ou encore de la tuberculose et des enzymes de termites. C’est désormais le riz qui peut servir à autre chose que l’alimentation, ou alors à l’alimentation électrique (TreeHugger). Ce sont ainsi les quelques 440 millions d’Indiens qui ne disposent toujours pas d’électricité (sur le réseau ou hors-réseau) qui pourraient trouver une alternative aux éoliennes et aux panneaux solaires qui restent à un niveau technique trop élevé.

En fait, ce sont les cosses du riz, cette mince enveloppe qui les entoure, qui va servir à produire de la biomasse. Rien de bien nouveau, sauf que l’endroit et la quantité disponible de cosses ont fait franchir le pas à Husk Power Systems. Actuellement, cette entreprise parvient à alimenter 50 000 personnes qui n’ont pas accès au réseau dans l’état de Bihar (une région particulièrement pauvre de l’Inde).

Jusque là les cosses des grains de riz étaient jetées. Mais avec ce système de méthanisation de la biomasse, 1,5 kilos de cosses permettent de générer 1kWh d’électricité. Chaque générateur a une capacité de 35 à 100 kWh et est relié à un petit réseau électrique construit sur mesure selon les besoins et la topographie des lieux.

Source image :

+ : Une "major" indienne mise sur le biocarburant aux algues



Agrocarburants Energies renouvelables

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