Dundee Sustainable Technologies Completes the Commissioning of its Demonstration Plant

MONTREAL, QUEBEC, November 9, 2015 – Dundee Sustainable Technologies Inc. (“DST” or the “Corporation”) (CSE: DST) is proud to announce that it has successfully completed the commissioning of its demonstration plant as of October 31st, 2015.

During the commissioning period, over 50 tonnes of pyrite concentrate containing gold and copper was fed to the oxidation circuit with successful removal of the sulfur. The efficiency of the gas treatment was also proven by keeping a full capture of the gases generated by the oxidation.

The gold and copper extraction circuit was also successfully commissioned allowing the Corporation to proceed with the demonstration phase of the project. The demonstration will be done on the same pyrite concentrate that was used during the commissioning during the first-four month period of operations at the plant. The processing of this concentrate will allow DST to demonstrate the amenability of its cyanide-free process to extract gold in the presence of copper thus providing a competitive edge over cyanidation.