Case Studies

Hydrogen Sulfide Odor & Corrosion Control using PRI-SC®


A southeast municipal wastewater treatment facility needed a more cost-effective and efficient method to address hydrogen sulfide odor and corrosion control issues in their collection system. US Peroxide's PRI-SC® technology was brought in as a viable solution. PRI-SC® is a proprietary technology developed by US Peroxide and has proven to be very cost effective in large force main and gravity collection systems.

The PRI-SC® technology integrates the use of iron salts and hydrogen peroxide in a unique fashion. This technology enhances the traditional use of iron salts for odor and corrosion control. It provides treatment to non-detectable levels of dissolved sulfide at a lower cost than either iron salts or oxidizers alone. In a PRI-SC® treatment system, an iron salt is applied at a pump station(s) near the beginning of the collection system. The iron reacts with dissolved sulfide to form ferrous sulfide (FeS), an insoluble precipitate. Then, using the PRI-SC® process, hydrogen peroxide is applied to the flow at point(s) downstream. Hydrogen peroxide oxidizes FeS and regenerates the iron that is added upstream. This municipality has been utilizing PRI-SC® successfully to control hydrogen sulfide.

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Additional Municipal Projects
Improve Safety & Operational Reliability, DHS Compliance


A steel mill was having problems with their existing H2O2 installations due to age and poor materials of construction, which led to significant routine downtime for repair.

US Peroxide was asked to supply two turn-key equipment systems, thereby improving safety and operational reliability. Replacing one of the sites also eliminated Department of Homeland Security reporting requirements for non-fixed peroxide storage containers.

US Peroxide supplied 35% hydrogen peroxide, one 1,100 gal turn-key storage and dosing system (pictured above), one 6,500 gal turn-key storage and dosing system, remote tank monitoring & product inventory management services, equipment system installation, start-up and ongoing maintenance as well as applications support and safety training. The systems have been operating smoothly and without incident since installation.

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Additional Industrial Projects
Gulf Coast Refinery - Supplemental Dissolved Oxygen

Supplemental Dissolved Oxygen, Rapid Response, Drum Conversion

A Gulf Coast Refinery was using hydrogen peroxide (H2O2) in 55-gallon drums at their WWTU Bio Unit to supply supplemental dissolved oxygen (D.O.) to maintain target D.O. levels in the aeration basins during high COD loading periods. The drums were stored on wood pallets, which violated industry safety standards and also required handling (changing out the drums), which increased the risk of spills and exposure to operators. Furthermore, during a turnaround of an upstream unit, higher COD loading depleted the dissolved oxygen level in the WWTU Aeration Basins, resulting in ineffective treatment.

The refinery approached US Peroxide (USP) to engineer a bulk H2O2 chemical dosing system sized to meet the plant's D.O. demand. USP responded to the refinery's immediate need by quickly mobilizing a four-person Project Team that included a local account manager and experts in the areas of technical applications, equipment system design and equipment installation/maintenance.

The team installed a USP Rapid Response System consisting of a 5,000-gallon temporary storage trailer and a modular dosing control system. Upon the addition of Refinery Grade 27% H2O2, a class 1 oxidizer, to influent of the WWTU Bioreactor System, the D.O. target was maintained during the high COD loading period.

Once the temporary system was commissioned, the USP Project Team turned their attention to providing a permanent full service chemical storage and dosing system including a 5,000-gallon double-wall HDPE tank, dual pump dosing module, chemical, field service and monitoring system.

USP worked with the plant's engineers to determine the optimum dose point as well as the proper location for the chemical storage tank. The changeover occurred following the plant turnaround and was completed by the USP Field Services Team without incident and without disruption to the treatment program.

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Additional Refinery, Oil, Gas, Mining, Upgraders Projects
Gas Station Remediation (ISCO)

Total Chemical Management for Remediation

A remediation company was contracted to perform a cleanup of an abandoned gas station in south central Pennsylvania. The consulting engineer and the remediation contractor selected a treatment program utilizing In-Situ Chemical Oxidation (ISCO) as the preferred treatment technology. Due to the magnitude of the contamination and the widespread nature of the groundwater contamination, significant quantities of chemical (hydrochloric acid, ferrous sulfate, hydrogen peroxide, and sodium persulfate) and equipment were required to execute the site remediation.

The scope and structure of the project required that a high volume of multiple chemicals be mobilized quickly which created a significant operational and cost challenge for the contractor. US Peroxide developed a Total Chemical Management Program to efficiently, and cost-effectively, execute the project.

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Additional Remediation Projects