Institut De Recherche Pour Le Developpement (ird)

Institut De Recherche Pour Le Development (ird)

Bruno Chardin

Marie-Laure Fardeau

Yannick Aman Baptiste Combet-Blanc

Bernard Marcel Noël Ollivier

A process for the decontamination of an effluent containing one or more dissolved metals is provided. The process includes producing hydrogen sulphide in an aqueous medium by culturing alkaliphilic sulphate-reducing or thio-sulphate reducing bacteria in the presence of an organic compound serving as an electron donor and in the presence of a sulphurous compound serving as an electron acceptor. The effluent is contacted with the hydrogen sulphide and the dissolved metals are reduced and/or precipitated in the form of metal sulphides.

Method for producing hydrogen sulphide and the use thereof, in particular, for depolluting heavy metal-containing flows

The invention relates to using alcalophilic sulphate-reducing bacteria selected from at least one species of a Desulfohalobiaceae orspecies family or from species whose gene encoding for ribosomal PARN 16S has a homology equal to or greater than 97% with a corresponding gene of any species of the Desulfohalobiaceae orspecies family for producing a hydrogen sulphide substantially soluble in an aqueous medium.

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Aubagne, France

Bruno Chardin