Desulfurization of sewer gas by anaerobic processing of sludge comprises leading the gas into aqueous washing liquid zone to dissolve hydrogen sulfide

摘要

Method for desulfurization of sewer gas (I) by anaerobic processing of sludge comprises leading (I) in a first closed zone having an aqueous washing liquid (II), where hydrogen sulfide (A) is dissolved in (II), obtaining and reusing the desulfurized (I) and continuously/quasi-continuously leading (II) into a second zone, aerating with oxygen-containing gas to oxidize (A) with the dissolved oxygen to water and elementary sulfur. Method for desulfurization of sewer gas (I) by anaerobic processing of sludge comprises leading (I) in a first closed zone having an aqueous washing liquid (II), where hydrogen sulfide (A) present in (I) is dissolved to a large extent in (II), obtaining and reusing the desulfurized (I) and continuously or quasi-continuously leading (II) (enriched with (A)) from the first zone into a second zone, aerating with oxygen-containing gas to oxidize (A), dissolved in (II), with the dissolved oxygen to water and elementary sulfur and continuously or quasi-continuously removing a quantity of finely dispersed elementary sulfur enriched (II) and partially recycling into the first zone or completely withdrawing directly. An independent claim is also included for a device, for carrying the above method, comprising a putrid plant (4) with a delivery pipe for sulfur containing sewer gas (5) into an agitated container for the first zone (1), at least one feeding line to a further agitated container for the second zone (2), a delivery pipe (6) for desulfurized sewer gas, an inlet (7) for the oxygen-containing gas into the second zone, a delivery pipe for the second zone into a storage vessel (3), a delivery pipe (8) from the storage vessel (3) and also from feeding lines (9) or (10) from the putrid plant to the containers of the second or first zone.