--- description: Green Steel Environmental returns to WEFTEC 2026 with full-scale performance data from Boulder's Water Resource Recovery Facility. The company's Green Steel PSR™ has thus far removed 13,000 lbs of phosphate and displaced 12,000 gallons of hazardous chemicals resource: https://pressonify.ai/news/what-see-weftec-2026-green-steel-environmental-returns-full-_w8fve0u tags: - wastewater - phosphorus - H2S - hydrogen sulfide - ferric chloride - anaerobic digestion - anaerobic digester timestamp: '2026-09-25T13:31:42+00:00' title: 'What to See at WEFTEC 2026: Green Steel Environmental Returns with Full-Scale Pilot Data' type: press-release --- # What to See at WEFTEC 2026: Green Steel Environmental Returns with Full-Scale Pilot Data Green Steel Environmental returns to WEFTEC 2026 with full-scale performance data from Boulder's Water Resource Recovery Facility. The company's Green Steel PSR™ has thus far removed 13,000 lbs of phosphate and displaced 12,000 gallons of hazardous chemicals - Issued by: Green Steel Environmental - Published: 2026-09-25 - Last modified: 2026-09-25 - Canonical URL: https://pressonify.ai/news/what-see-weftec-2026-green-steel-environmental-returns-full-_w8fve0u September 24, 2026 – Green Steel Environmental, a Boulder, Colorado cleantech company, is returning to WEFTEC 2026 with field-proven data from the first full-scale municipal deployment of Green Steel PSR™, a patented additive made from upcycled steel slag. The product replaces hazardous treatment chemicals in wastewater and biogas operations. Green Steel Environmental will showcase results from the City of Boulder's Water Resource Recovery Facility at Booth #7946, where the technology has been operating at full scale since early June, demonstrating that laboratory performance successfully translated to real-world municipal conditions. **KEY FACTS** - **Phosphate Removal:** Green Steel PSR™ has thus far removed 13,000 lbs of phosphate at the Boulder WRRF deployment - **Chemical Displacement:** The product has thus far displaced 12,000 gallons of hazardous chemicals since pilot commencement - **Wastewater Treated:** Thus far, 1.2 billion gallons of wastewater treated in part since June 2026 - **Methane Cleaned:** 14 million standard cubic feet of methane cleaned, thus far, through the deployment - **Market Position:** Only company to produce and sell steel slag for wastewater treatment and biogas/RNG production - **Availability:** Now available in the US and Canada - **EPA Validation:** Cleared EPA 503, EPA WET, and EPA TCLP testing **What Green Steel PSR™ Does** Green Steel PSR™ is an upcycled byproduct of steel manufacturing that’s engineered to sustainably reduce phosphorus and sulfur levels in digesters, thus inhibiting scaling and H₂S formation. Unlike chemical treatment, it sequesters phosphates and sulfides while protecting alkalinity and digester stability. It also mitigates corrosion caused by metal salts, which drives down operational costs. Furthermore, biosolids that contain Green Steel PSR™ release phosphorus and sulfur in a slow, plant-available manner in the digestate — a characteristic growers and fertilizer producers prefer. **The Boulder Deployment Results** The City of Boulder's Water Resource Recovery Facility serves as Green Steel Environmental's first municipal-scale showcase. Since the pilot commenced in early June 2026, the deployment has generated measurable performance data that the company will present to WEFTEC attendees. The 13,000 lbs of phosphate removed represents a significant volume reduction for a facility treating 10 million gallons of wastewater daily. The 14 million standard cubic feet of methane cleaned demonstrates biogas quality improvement, while the 12,000 gallons of hazardous chemicals displaced highlights both safety and operational cost benefits for the municipality. "Last year at WEFTEC, we introduced the wastewater community to an idea. This year, we're bringing them the data," said Jon Teaford, CEO and co-founder of Green Steel Environmental, whose company has received $2.2 million in seed funding and achieved recognition as a SXSW Pitch 2026 finalist in the Sustainability, AgTech and Food category. "Our first full-scale deployment at Boulder's Water Resource Recovery Facility is performing as the lab data predicted, and we're bringing that proof to WEFTEC so operators and engineers can see it for themselves." **The Science Behind Steel Slag Utilization** Steel slag has historically been used as low-value roadway aggregate and stockpiled at steel mills throughout the country. Green Steel Environmental discovered that the composition of steel slag is well-suited to capturing phosphorus and sulfur in wastewater. "Steel slag is sitting in stockpiles at steel mills throughout the country, mostly used as a low-value roadway aggregate," said Prof. Mark Hernandez, Chief Scientific Advisor and inventor of Green Steel PSR™. "What we discovered is that its chemistry is well suited to capturing phosphorus and sulfur in wastewater. Getting hazardous chemicals like ferric chloride out of wastewater treatment is a goal we can achieve with this product." The technology has been validated in peer-reviewed research and published in Water Environment Research, the journal of the Water Environment Federation, the organization that organizes WEFTEC. The peer-reviewed publication status provides third-party scientific validation of Green Steel PSR™'s performance mechanisms and results. **What Attendees Will See at Booth #7946** Green Steel Environmental will display full-scale pilot results and performance metrics from the Boulder WRRF deployment during WEFTEC 2026. The company will provide a technical walkthrough explaining how Green Steel PSR™ adsorbs phosphorus and sulfur and why the product is engineered as a replacement for corrosive chemicals like ferric chloride. Company leadership will be on-site throughout the exhibit hall's open hours from Monday, September 28 through Wednesday, September 30 to answer technical questions and explore pilot opportunities with operators and engineers attending the conference. Media can schedule one-on-one interviews with company leadership at the booth to explore various story angles. Green Steel Environmental will also present information about where additional pilots are underway and how the technology applies beyond municipal wastewater to other markets. Green Steel PSR™ is applicable for biogas and renewable natural gas producers, dairy farms, food processing plants, pulp and paper mills, and breweries and distilleries, any operation needing to control phosphorus and hydrogen sulfide. This market expansion demonstrates the broader applications for steel slag utilization in treating multiple industrial and agricultural waste streams. **About Green Steel Environmental** Green Steel Environmental is a cleantech company based in Boulder, Colorado focused on sustainable wastewater and biogas treatment solutions. The company develops products from steel slag, a byproduct from steel manufacturing, transforming waste material that would otherwise sit in mill stockpiles into valuable treatment additives for the water and renewable energy sectors. Green Steel Environmental's flagship product, Green Steel PSR™, has been deployed at municipal facilities and is available throughout the US and Canada for wastewater treatment and biogas operations. The company raised $2.2 million in seed funding in January 2026 and was recognized as a SXSW Pitch 2026 finalist in the Sustainability, AgTech and Food category. Green Steel Environmental's technology has cleared EPA 503, EPA WET, and EPA TCLP testing standards and has been validated through peer-reviewed publication in Water Environment Research. **WEFTEC Speaking Engagement** CEO Jon Teaford will speak at the WEFTEC Advancing a Circular Water Economy event in Room 356 on Sunday, September 27 from 8:30 AM to 12:00 PM. For more information about Green Steel Environmental and Green Steel PSR™, visit the company's booth at WEFTEC 2026, or contact Green Steel Environmental directly. Media interested in scheduling interviews ahead of the show are encouraged to contact the company directly. ## Related concepts - [Green Steel Environmental](/okf/org/green-steel-environmental.md)