Saving Dollars And Crushing Odors: How SulFeLox® Outperformed Calcium Nitrate In Tackling H2S

Faced with increased chemical prices, a large facility in Tennessee wanted to trial Sulfelox® as a potential alternative to their Bioxide program. USP Technologies was brought in to prove that SulFeLox® could replace nitrate at a 3:1 volume ratio which in a long-term program opens the door for cost savings up to 25%. Additionally, the program would need to provide similar H2S performance (<10ppm vapor average) to ensure the life cycle of the manifolded force mains.

PS 1 feeds into a dual 12” force main that has three smaller force mains that manifold in before discharging at the control point downstream. PS 1, PS 2, and PS 3 are all equipped to use Bioxide for sulfide control at the discharge and have performed well for over 20 years. The retention time for this force main is relatively long (7-8 hours), and provides a perfect application to switch to SulFeLox® for hydrogen sulfide control. In June of 2023, the city turned off their chemical feed to establish baseline conditions, followed by 30 days of dosing SulFeLox® at Pump Station 1.