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MEI Online: Biotechnology: Latest News: June 4th 2019


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:: BacTech Takes Bioleach Tech to Snow Lake


Toronto, Canada-based BacTech Environmental will be bringing its bioleach technology to the gold residual stockpile at Snow Lake in Manitoba, alongside partners GMR and Dundee Sustainable Technologies (DST).

The teaming, formalised with a recent letter of intent, permits licensing of the technology and makes the company a technology partner as the group targets the use of the bioleaching for remediation of the stockpile site.

"GMR is relying on BacTech's historical research conducted in 2011-12 that showed oxidation rates of 95% and gold recovery of 88.6% on material obtained from the arsenic stockpile," the company said, citing previous work it had performed there. "Due to a lack of iron in the stockpile, the residual material could not be stabilised and was abandoned."

The Snow Lake site, now government owned, is made up of a stockpile of arsenopyrite concentrate proven to contain residual gold and silver contents. In one of its projects in 2011, BacTech drilled and assayed the stockpile and submitted a NI43-101 report.

The site's measured mineral resource estimates includes 264,596t grading 9.76g/t of gold and 2.17g/t of silver. Indicated resource estimates include 9,300t grading 9.2g/t gold and 2.15g/t silver and an inferred mineral resources total 28,000t of 7.0g/t gold and 2.4g/t silver.

"Our return to Snow Lake is predicated on Dundee Sustainable Technologies providing a solution to the unstable arsenic product we generated in our earlier work that killed the project," CEO Ross Orr noted.

"The stockpile has a deficiency in iron leading an unstable ferric arsenate product after bioleaching. By passing this unstable material to be vitrified the arsenic can be safely disposed. We look forward to re-engaging in the Snow Lake project."

Added GMR chief executive David LeClaire: "BacTech's historic work on the project and its proprietary bioleach technology teamed with DST's vitrification technology is a promising solution to the remediation of a longstanding environmental concern of the community of Snow Lake without cost to the taxpayer."




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