Green Steel PSR is an upcycled, clean-tech additive that dramatically improves how phosphorus and sulfur are removed from wastewater plants. Our material is a natural replacement for hazardous chemicals like ferric chloride, ferric sulfate and aluminum sulfate. As an added benefit, we remove sulfur in your digester before it becomes hydrogen sulfide…which controls odor and significantly drops the load on your sulfur scrubbing equipment. It also provides a slight pH increase, which will reduce your costs on other pH amendments.