Hydrogen sulfide (H₂S) presents a significant challenge in wastewater management. Its foul odor and corrosive nature can severely damage infrastructure, leading to costly repairs. More importantly, H₂S poses substantial health risks, including respiratory issues and, at high concentrations, potentially lethal effects. Effective H₂S control is not just a regulatory requirement; it's essential for safeguarding infrastructure and public health.

Our Solution:

SulFeLox® is USP’s patented buffered iron solution for wastewater collection system sulfide control, with a hazard rating profile similar to nitrate (1-0-0).

PRI-TECH® is a combination treatment that integrates iron salts with hydrogen peroxide in a unique and synergistic fashion. The results are both cost savings and treatment enhancement compared to using iron salts alone.

Sulfide odor control within sanitary sewers has been practiced for over 50 years, yet only recently have substantive advances been made. Where once the choice of chemical treatment was either chlorine or iron salts, safer and more environmentally benign technologies based on nitrates, hydrogen peroxide, and/or magnesium hydroxide have gained acceptance. These new alternatives, however, can increase treatment costs substantially and present limitations in themselves. Therefore, it makes sense to explore new avenues for lessening the adverse impacts of the older, cheaper mainstays, particularly iron salts (ferrous/ferric chloride or sulfate) that provide other benefits to wastewater treatment operations.

When applied to plant influents, hydrogen peroxide destroys dissolved and/or total sulfide that otherwise scavenges Fe³⁺ added for CEPT and/or chemical phosphorus removal from wastewater. The foundational aspect of this PRI-TECH application (called PRI-CEPT) is that one lb of total sulfide theoretically consumes 3.5 lbs Fe³⁺ and thus represents an additional cost of $2 – 3 per lb influent sulfide.

Iron salts are a proven technology for long-duration hydrogen sulfide control in collection system gravity and forcemains; solids processing units, solids transfer lines and anaerobic digesters. They have been used for over 30 years in hydrogen sulfide control applications and are a well understood technology.

Read about hydrogen peroxide, a powerful yet versatile oxidant that is both safe and effective in wastewater treatment.

As the final step before treated wastewater leaves the plant, effective disinfection is extremely important to protect human health, and the maintenance of the environment. This process eliminates pathogenic organisms that cannot be removed by previous treatment steps and reduces the spread of pathogens in the natural ecosystem.

USP’s current offerings include our unrivaled in-house CFD modeling expertise that can be used to optimize the injection, mixing and feed rates of PAA to meet the disinfection requirements of a facility. Also, launching later this year, is our OaSys iCT™ is a novel control approach that optimizes disinfection performance by calculating the optimal chemical dosage that accounts for sources of treatment variability in real time. Available for use with PAA or chlorine.

Ozone treated drinking water can contain small quantities of residual ozone that may be released into the atmosphere in certain water treatment plant stages, e.g. mix tanks, filters, etc. OxyPure™ hydrogen peroxide can be added to ensure destruction of residual ozone and minimize ozone release.

Hydrogen Peroxide typically controls odors and corrosion at primary wastewater treatment plant headworks by direct oxidation of hydrogen sulfide (H₂S) within the wastewater.

Phosphorus and nitrogen, while necessary elements for life, when concentrated in the effluent of a wastewater treatment plant, are harmful to the environment, especially aquatic plants and animals. When concentrated amounts of these elements enter bodies of water, it causes algae blooms, which reduces dissolved oxygen in the water and can be damaging to animal populations. It can be a very serious problem for natural areas downstream of industrial or municipal discharge.

For more than 20 years, USP Technologies’ comprehensive biosolids odor and corrosion control solutions have been extremely effective at reducing sulfides and other odor causing compounds in municipal and industrial wastewater treatment systems.

A sugar processing facility was experiencing hydrogen sulfide (H2S) odor issues in their process water stabilization ponds due to anaerobic conditions.

On a late Friday afternoon in June, a call came in to USP Technologies (USP): a major poultry processing plant in the southeast was in danger of violating their wastewater discharge permit.

The use of hydrogen peroxide to supply supplemental dissolved oxygen (DO) to activated sludge and other biological treatment systems is well documented and has been successfully practiced for decades.

The unique properties of hydrogen peroxide (H2O2) make it a good technology for keeping cooling loops, process water loops and heat exchangers clean from fouling that can occur due to various contaminants in the water.

Nitrogen oxides are major pollutants in the atmosphere, being a precursor to acid rain, photochemical smog, and ozone accumulation. The oxides are mainly nitric oxide (NOx) and nitrogen dioxide (NO2) both of which are corrosive and hazardous to health.