Method for biological cleaning of a contaminated gas flow
AssigneeMansanto Europe S.A.
InventorChristianus Petrus Maria van Lith
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Abstract
The invention relates to a method for biological cleaning of a contaminated gas flow containing gaseous and/or particulate contaminants comprising the steps of contacting the contaminated gas flow counter-currently with a jet of suitable microorganism-containing scrubbing liquid in order to enhance absorption of gaseous and particulate contaminants in the scrubbing liquid; recovering the scrubbing liquid in a vessel; draining part of the scrubbing liquid from the vessel and compensating the drained part with fresh liquid. The method is carried out in a reverse jet scrubber and does not use any packing material for support to the microorganisms.
Claims12
A method for cleaning a contaminated gas flow containing gaseous and/or particulate contaminants comprising the steps of:
- contacting the contaminated gas flow counter-currently with a jet of suitable microorganism-containing scrubbing liquid in a froth zone in order to enhance absorption of contaminants in the scrubbing liquid;
- recovering the scrubbing liquid in a vessel, contaminants absorbed in the recovered scrubbing liquid being biologically oxidized by the microorganisms contained therein;
- recirculating scrubbing liquid recovered in the vessel to the froth zone;
- draining part of the scrubbing liquid from the vessel;
- and
- compensating the drained part with fresh liquid.
A method for cleaning a contaminated gas containing gaseous and/or particulate contaminants comprising the steps of:
- flowing the contaminated gas vertically downward in a substantially vertical first gas duct;
- discharging a jet of suitable microorganism-containing scrubbing liquid from a nozzle disposed within the first gas duct, the nozzle being positioned within the first gas duct such that the contaminated gas flow contacts the jet of scrubbing liquid counter-currently, thereby generating a froth zone in which contaminants in the gas flow are transferred to and absorbed in the scrubbing liquid and producing a treated gas flow;
- recovering the scrubbing liquid in a vessel in fluid communication with the first gas duct, contaminants absorbed in the recovered scrubbing liquid being biologically oxidized by the microorganisms contained therein;
- discharging the treated gas flow from the vessel through a second gas duct in fluid communication with the vessel;
- recirculating scrubbing liquid from the vessel to the froth zone through the nozzle;
- draining part of the scrubbing liquid from the vessel;
- and
- compensating the drained part with fresh liquid.
Dependencies are inferred from the claim text.