Paqell B.v.

Albert Joseph Hendrik Janssen

Johannes Bernardus Maria Klok

Gijsbert Jan Van Heeringen

Jan Klok

Frederikus De Rink

Jan Henk Van Dijk

Jan-Henk Van Dijk

Karine Kiragosyan

Karel Keesman

Pawel Roman

Gijs Van Heeringen

The invention is directed to a continuous process to treat a hydrogen sulphide comprising gas comprising the following steps: (a) contacting the hydrogen sulphide comprising gas with an aqueous alkaline solution further comprising sulphide oxidising bacteria thereby obtaining a loaded aqueous solution comprising sulphide compounds and sulphide oxidising bacteria. (b) contacting the loaded aqueous solution with an oxygen comprising gas to regenerate the sulphide oxidising bacteria to obtain a liquid effluent comprising regenerated sulphide oxidising bacteria which is partly used as the aqueous alkaline solution in step (a). (c) separating elemental sulphur as prepared by the sulphide oxidising bacteria in steps (a) and (b) from the loaded aqueous solution of step (a) and/or from the liquid effluent of step (b) and wherein the consumption of oxygen in step (b) is measured and wherein the supply of oxygen in step (b) is controlled by the measured consumption of oxygen.

Continuous process to treat a hydrogen sulphide comprising gas

A process to treat a gas comprising hydrogen sulphide and mercaptans is described. The following steps are part of this process: (a) contacting the hydrogen sulphide and mercaptans comprising gas () with an aqueous solution () comprising sulphide-oxidising bacteria thereby obtaining a loaded aqueous solution () and a gas () having a lower content of hydrogen sulphide and mercaptans, (b) contacting the loaded aqueous solution with mercaptan reducing microorganisms immobilized on a carrier under anaerobic conditions, (c) separating the aqueous solution obtained in step (b) from the mercaptan reducing microorganisms to obtain a first liquid effluent (), and (d) contacting the first liquid effluent () with an oxidant () to regenerate the sulphide-oxidising bacteria to obtain a second liquid effluent () comprising regenerated sulphide-oxidising bacteria. The sulphide-oxidising bacteria as present in step (a) are comprised of regenerated sulphide-oxidising bacteria obtained in step (d).

Process for treating a hydrogen sulphide and mercaptans comprising gas

The invention is directed to a process for the biological conversion of bisulphide into elemental sulphur, comprising the following steps: a) converting bisulphide as dissolved in an aqueous solution to elemental sulphur in the presence of sulphide-oxidizing bacteria and under anaerobic conditions to obtain a first liquid effluent comprising elemental sulphur and used sulphide-oxidizing bacteria; b) regenerating the used sulphide-oxidizing bacteria as obtained in step (a) and as comprised in an aqueous solution in the presence of an oxidant to obtain a second liquid effluent comprising regenerated sulphide-oxidizing bacteria; c) separating elemental sulphur from either the first and/or the second liquid effluent; d) using the regenerated sulphide-oxidizing bacteria in step (a) as the sulphide-oxidizing bacteria.

Process for the biological conversion of bisulphide into elemental sulphur

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Geldermalsen, Netherlands

Albert Joseph Hendrik Janssen