Method for producing hydrogen sulphide and the use thereof,...

Liquid purification or separation – Processes – Treatment by living organism

Reexamination Certificate

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C210S615000, C210S631000, C210S912000

Reexamination Certificate

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07862721

ABSTRACT:
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.

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Pikuta E V et al., “Desulfonatronum thiodismutanssp. nov., a novel alkaliphilic, sufate-reducing bacterium capable of lithoautotrophic growth”, 2003, pp. 1327-1332.
Zhilina et al.,Desulfonatronovibrio hydrogenovoransgen. nov. sp. nov., an alkaliphilic, sulphate reducing bacterium; Int. J. Syst. Bacteriol. Jan. 1997, p. 144.

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