I'm involved in a study of odor control technologies for municipal wastewater treatment plant. One of the control options involves a chemical 2-stage (acid/alkaline) packed bed scrubber. The alkaline stage uses sodium hypochlorite as an oxidant. The particular application involves emissions from the solids management activities at the treatment plant. That is the odorous air sources do not include the liquid treatment parts of the plat. The plant does not have anaerobid digesters. The odorous air results from management of screenings and processing of screenings and sludge from primary and secondary clarifiers.

I know that the use of hypochlorous acid in disnfection of water and wastewater leads to the formation of various halogenated disinfection byproducts that have toxicological concerns. This gives me concern about the use of hypochlorous acid in the odor control scrubber.

There is technical data indicating the efficiency of HOCl in oxidixing reduced odor compounds. But I have not been able to find any information regarding the presence or absence of byproducts of this oxidation process, particularly species such as haloacetics, halates, halites, and haloforms.

Is anybody aware of any information on this topic?

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