Results of oxygen dosing
Dosing of oxygen results into the followings:
- Oxidation of hydrogen sulfide to intermediate products and the oxidation of the intermediate products to sulfate.
- Creation of an aerobic layer on outer surface of the biofilm preventing sulfide generation in the layer. Sulfide generated in the inner anaerobic layer will diffuse out to the aerobic layer, where it will be oxidized thereby preventing its accumulation in the bulk water despite continuous production in inner anaerobic layers.
- The presence of oxygen supports the growth of heterotrophic organisms in the anaerobic layer of the biofilm, thereby oxidizing the organic matter present in the wastewater. The oxidation of both sulfide and organic matter occurs simultaneously.
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