Verfahren für die Beseitigung von Schwefeldioxyd aus Abgas.

摘要

The invention provides a process for the removal of sulfur dioxide from waste gas, comprising the steps of: a) contacting the waste gas with a basic aqueous solution wherein sulfur dioxide is dissolved as sulfite (2); b) subjecting the aqueous solution containing sulfite to sulfur reducing bacteria in an anaerobic reactor (6) wherein sulfite is reduced to sulfide; c) subjecting the aqueous solution containing sulfide to sulfur oxidizing bacteria in the presence of a limiting amount of oxygen in a reactor (10) wherein sulfide is oxidized to elemental sulfur; d) separating the elemental sulfur form the aqueous solution (14) and e) recycling (3) the aqueous solution to step a).