VANCOUVER, British Columbia, April 22, 2026 (GLOBE NEWSWIRE) -- EnviroGold Global Limited (TSX-V: NVRO | OTCQB: ESGLF | FSE: YGK) (“EnviroGold” or the “Company”), a clean technology company focused on the recovery of precious and critical metals from mine waste and tailings, is pleased to announce that the shipment of Hecla Mining Company’s Greens Creek tailings arrived in Fremantle, Western Australia on April 21, 2026. The tailings will be used for the next phase of process validation and commercial advancement of the Company’s proprietary NVRO Process™.
The program follows the successful completion of Phase 1 and Phase 2 test work, as previously announced on March 2, 2026.
Advancing to Pilot and Demonstration Scale
Validation of the NVRO Process™ will advance to the Phase 3 micro NVRO pilot plant campaign, operating at approximately 50 kg per day. This will be followed by the Phase 4 commercial production demonstration campaign, with a processing capacity of approximately 300 tonnes per annum.
These campaigns represent a critical step in advancing the NVRO Process™ from technical validation toward commercial deployment by providing scale-up data and operational insights.
Commercial Validation and Product Definition
The Greens Creek feedstock will undergo sampling, analytical assessment, and preparatory work ahead of the pilot and demonstration campaigns. The Phase 3 and Phase 4 campaigns are expected to be completed by late August 2026, subject to third-party laboratory turnaround times.
The program is designed to confirm process performance at increasing scale, produce material for assessment of product quality and saleability, and define commercial pathways for primary product streams and potential by-products.
The outcomes are expected to support advancement of the NVRO Process™ to Technology Readiness Level (“TRL”) 8, representing commercial validation of both process and product streams.
Progression Toward Commercial Deployment
The Greens Creek program forms a key part of EnviroGold’s broader campaign portfolio, which is focused on advancing the NVRO Process™ toward TRL 9, representing full industrial-scale commercial production.
The Company believes that completion of this and other client campaigns will reduce technical and execution risk, support project development, commercial engagement, and provide a pathway toward revenue-generating deployments.
“The arrival of Greens Creek tailings in Fremantle enables the commencement of our pilot and demonstration campaigns, marking the next stage of validation for the NVRO ProcessTM on one of the most significant opportunities in our pipeline,” said Grant Freeman, Chief Executive Officer of EnviroGold. “The micro NVRO and commercial scale demonstration campaigns will generate the technical and commercial data required to advance process maturity and support progression to TRL 8, including confirmation of product saleability and commercial pathways. This program defines a clear pathway to TRL 9 and full commercial deployment, supporting EnviroGold’s strategy to deliver an industrial-scale process and advance projects to revenue-generating operations.”
About Technology Readiness Levels
TRLs are a standard framework used to assess the maturity of a technology from laboratory and pilot stages through to demonstration and commercial deployment.
Within EnviroGold’s framework, TRL 8 represents commercial validation of process and product streams, and TRL 9 represents full industrial-scale commercial production.
About EnviroGold Global
EnviroGold Global is a clean-technology company that enables the recovery of high-value precious, base, and critical metals from mine waste and tailings using its proprietary NVRO Process™. By unlocking metals from existing, above-ground assets, EnviroGold delivers scalable, lower-impact metal recovery solutions that complement traditional mining operations and align with global ESG frameworks and critical-minerals strategies.