Processes for producing h2s using sulphur-reducing bacteria

Details Processes for producing h2s using sulphur-reducing bacteria Processes for producing h2s using sulphur-reducing bacteria

C - Chemistry, Metallurgy

12

P

C12P 3/00 (2006.01) C12M 1/00 (2006.01) C12M 1/107 (2006.01)

Patent

CA 2714970

There is provided a process for producing H2S comprising: a) continuously providing an electron donor at a vari-able rate to a biosolution comprising sulphur reducing bacteria; b) reacting elemental sulphur with HS to from soluble polysul-phide; c) providing said polysulphide to a bioreactor having the biosolution, thereby producing H2S gas in the bioreactor; and d) continuously removing H2S gas from the bioreactor, wherein an average rate of providing polysulphide to sulphur reducing bacte-ria is equal to an average rate of polysulphide consumption by the sulphur reducing bacteria.

L'invention porte sur un procédé de fabrication de H2S consistant : à (a) introduire en continu un donneur d'électrons à une vitesse variable dans une biosolution comprenant des bactéries réductrices de soufre; à b) faire réagir le soufre élémentaire avec HS afin de former du polysulfure soluble; c) à introduire ledit polysulfure dans un bioréacteur ayant la biosolution, ce qui permet de produire H2S gazeux dans le bioréacteur; et d) à éliminer en continu H2S gazeux du bioréacteur, une vitesse moyenne d'alimentation du polysulfure aux bactéries réductrices de soufre étant égale à une vitesse moyenne de consommation du polysulfure par les bactéries réductrices de soufre.

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