USP Technologies products

Chemical phosphorus removal from wastewater and/or CEPT removal from wastewater using hydrogen peroxide regenerated iron. 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 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.

When applied to primary settled solids (prior to thickening/digestion), the effect of the PRI technology is two-fold: 

Force main systems are typically high sulfide odor generators due to septicity conditions related to full pipe flow and a greater anaerobic slime layer (biofilm) thickness. Primary factors that influence sulfide loading generation in a force main include sewage temperature, BOD, retention time, pipe size and flow.  Gaseous hydrogen sulfide (H2S) release at the force main discharge is usually the main concern related to odor and corrosion control needs; however, corrosion problems within the pipe can be of a concern (e.g. `crown cutting`) at locations where air pockets can lead to concentrated H2S gas build up.

Gravity main sewer systems include major trunk lines and the tributaries that feed them. Hydrogen sulfide (H2S) odor builds up in the collections system as the flows collect from upstream reaches and become larger, deeper and more septic (oxygen depleted) in the downstream reaches more near to the wastewater treatment plant.  In general, most of the more significant hydrogen sulfide odor and corrosion control problems occur in the major trunk systems segments conveying flow to the plant. 

Hydrogen Peroxide typically controls odors and corrosion at primary watsewater treatment plant headworks by direct oxidation of hydrogen sulfide (H2S) within the wastewater. In the direct oxidation mode, H2O2 is applied to the wastewater 5-30 minutes prior to the point where the odors are being released, generally as the wastewater line enters the plant boundary.