PSR™ Benefits for Wastewater Treatment and Biogas Production

Green Steel PSR™ is engineered to remove phosphorus—including to ultra-low thresholds. It also cuts 80% or more of sulfur from anaerobic digesters – before it converts to hydrogen sulfide, relieving the strain on sulfur scrubbing media and preventing odor and corrosion at the source.

Green Steel PSR™ can replace or reduce the use of ferric, alum, polymers, and pH adjustment agents to drive down chemical expenditures by between 20% and 30%, providing wastewater treatment plants both immediate savings and reduced ongoing operational costs.

By substantially removing sulfur in anaerobic digesters, Green Steel PSR™ lowers H₂S concentrations in biogas to polishing levels. This cuts back on scrubbing costs, extends scrubber media life, and protects downstream gas infrastructure.

In lab testing, GreenSteel PSR™ causes digestate to dewater substantially more quickly than ferric chloride. This implies lower operating costs, including spending on polymers and other drying solutions. 

Green Steel PSR™ becomes the sacrificial nucleation surface, so scaling takes place on the particle rather than on the interior of digesters and associated infrastructure.

Unlike chloride- and sulfate-based chemicals, Green Steel PSR™ is non-hazardous and non-corrosive. Its alkaline composition helps buffer pH and protect concrete, steel, and biogas systems from chemical degradation, minimizing long-term repair and replacement costs.

Conventional treatment chemicals often increase residual chloride and aluminum levels, impacting effluent quality and biosolids reuse. Green Steel PSR™ introduces none of these contaminants, supporting cleaner discharge and more versatile end uses for biosolids.

The alkaline composition of Green Steel PSR™ provides natural pH stabilization in treatment processes. It reduces the need for lime or caustic soda additions and helps maintain ideal conditions for microbial activity in anaerobic digesters.

By capturing sulfur before it forms hydrogen sulfide (H₂S), Green Steel PSR™ significantly reduces odor emissions at wastewater treatment plants. This leads to less air pollution, fewer community complaints and a lesser need for odor control systems.

As a dry, granular material, Green Steel PSR™ eliminates the safety risks associated with handling corrosive liquid chemicals. It simplifies storage and handling requirements, reduces PPE needs, and improves compliance with OSHA standards.

By removing phosphorus early in the digestion process, Green Steel PSR™ disrupts the formation of struvite and vivianite, two common causes of pipe scaling and equipment fouling. This prevents costly cleanouts and prolongs the life of pumps, pipes, and centrifuges.