Process for the biological conversion of bisulphide into elemental sulphur
US9902975B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2015 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Feb 10, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.