mercredi 21 juillet 2010

Combattre les marées noires avec… les bactéries!


Depuis la fuite au large du Golfe du Mexique, la compagnie BP et le gouvernement des États-Unis cherchent désespérément une solution pour colmater la brèche. Mais ces multiples tentatives demeurent vaines jusqu’à maintenant. Barack Obama devrait se retourner vers d’autres alternatives et devrait imiter la multinationale américaine Wal Mart avec une solution… made un China

Les autorités chinoises utilisent plus de 23 tonnes d'une bactérie «mangeuse de pétrole» pour lutter contre une marée noire en mer Jaune due à l'explosion d'un oléoduc suivie d'un incendie vendredi!

L'accident a répandu environ 1500 tonnes de brut au large du port de Dalian, dans le nord-est de la Chine, où des dizaines de navires de récupération de pétrole et des centaines de bateaux de pêche s'affairaient à lutter contre la marée noire. C'est la première fois que la Chine a eu recours de façon importante à la biotechnologie pour résoudre un problème de pollution de l'environnement avec l'utilisation de la bactérie mangeuse de pétrole à Dalian.

Le processus de «biotraitement» utilise des microorganismes pour casser certaines molécules toxiques présentes dans les hydrocarbures et les transformer en des substances moins nuisibles. Le procédé a déjà été utilisé dans la lutte contre la marée noire provoquée en 1989 par l'Exxon Valdez en Alaska.

La surface polluée en mer Jaune était initialement de quelque 50 km2 et les secouristes ont utilisé des barrières flottantes pour empêcher l'avancée de la marée noire. Jusqu'à mardi, au moins 460 tonnes de brut ont été récupérées.

Des bactéries mangeuses de pétrole? Connaissant l’orgueil des Américains, il faut donc s’attendre à ce que leurs bactéries soient plus grosses et plus efficaces que le modèle chinois! Mais si cela ne fonctionne pas, il reste encore une dernière solution à TOUTE épreuve :

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