B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/84 (2006.01) B01D 53/14 (2006.01) B01D 53/48 (2006.01) B01D 53/52 (2006.01) C02F 3/34 (2006.01) C12P 3/00 (2006.01) C12S 5/00 (2006.01)
Patent
CA 2253936
The invention relates to a process for scrubbing a gas containing hydrogen sulphide and/or carbonyl sulphide, in which the spent scrubbing liquid is treated with autotrophic sulphide-oxidising bacteria capable of oxidising at high pH, and elemental sulphur is obtained, the elemental sulphur is separated and the treated scrubbing liquid is recycled to the gas scrubbing step. Before recycling, the scrubbing liquid may further be treated with heterotrophic thiosulphate-oxidising bacteria which produce polythionate which is useful for further enhancing the sulphide-scrubbing capacity of the scrubbing liquid.
L'invention concerne un procédé d'épuration d'un gaz contenant de l'acide sulfhydrique et/ou du sulfure de carbonyle dans lequel le liquide d'épuration usé est traité avec des bactéries autotrophes d'oxydation du sulfure capables d'une oxydation à un pH élevé, et du sulfure élémentaire est obtenu, le sulfure élémentaire étant séparé et le liquide d'épuration traité étant recyclé dans l'étape d'épuration du gaz. Avant le recyclage, le liquide d'épuration peut être à nouveau traité avec des bactéries hétérotrophes d'oxydation du thiosulfate, lesquelles produisent du polythionate utile pour améliorer davantage la capacité d'épuration de sulfure du liquide d'épuration.
Buisman Cees Jan Nico
Janssen Albert Jozef Hendrik
Kuenen Johannes Gijsbrecht
Robertson Lesley Anna
Sorokin Dimitri Yuri
Mccarthy Tetrault Llp
Paques Bio Systems B.v.
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