Control of Hydrogen Sulfide Buildup in Forcemains using Ozone and Oxygen
Abstract:A field study was conducted to study the effects of ozone and oxygen on hydrogen sulfide control in a forcemain at a suction pump station. Monitoring prior to ozone injection indicated H2S levels in excess of 200 ppm distributed throughout the day in the discharge manhole. With ozone injection into the forcemain during pump operation, and in the wet well on a timed basis when the pump was off, the H2S level in the discharge was reduced to a maximum of 45 ppm during spike events. The numbers of significant spike events were also reduced. The H2S levels were reduced to less than 2 ppm during spike events with the injection of ozone during pump operation and only oxygen when the pump was off. With about two minutes of ozone injection over an average 20 minute pump cycle, good control of H2S was achieved in the wastewater discharge from the forcemain.
Document Type: Research Article
Publication date: January 1, 2010
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