Manipueira Gold Recovery Technology
Our mission is simple - create a cleaner, safer, and more sustainable future for gold recovery.
Manipueira Gold Recovery Technology
"founded on the principles of sustainable science and health protection"
In July 2021, Bruce founded Manipueira Gold Recovery Technology, Inc., (f.k.a. Alchemy Mining Group, Inc.), a Company duly incorporated in the Province of British Colombia, Canada focused on the principles of sustainable science and health protection. Capitalizing on the years of research conducted at the Norman B. Keevil Institute of Mining Engineering - University of British Columbia Canada, the Company developed a four-stage transformational strategy designed to replace mercury-a potent neurotoxin and synthetic cyanide salts used as lixiviants (gold leaching agent) by artisanal miners in Southern Ecuador with Manipueira (Manihot esculenta Crantz).
Our technology, rooted in environmental, social, and governance (ESG) principles, is more than just a technical innovation—it's a climate action initiative. By converting existing mercury and cyanide-based technology compatable processing centers to Manipueira leaching operations, we aim to protect communities, preserve ecosystems, and increase gold yields.
With growing global demand for responsible mining solutions, we believe Manipueira represents a significant investment opportunity with the potential for financial returns, mitigating health threats, and positive environmental impact.
Bruce published the Action Plan promoting the strategy designed to introduce and demonstrate the use of Manipueira and; the re-purposing of a 50-tonne-per-day mercury and synthetic cyanide salts ore and tailings processing facility into the world’s first Manipueira Precious Metals Leaching Center thereby establishing a scalable, circular-economy model for environmentally responsible and health-conscious gold production.
Manipueira, a toxic agricultural waste by-product from the cyanogenic bitter cassava plant (a.k.a. cassava-wastewater) produced by an internal chemical reaction as a defense mechanism triggered only when the integrity of the plant cellular structure is compromised for example; by preditors or flour manufactures crushing the plant. The bitter cassava plant does not contain cyanide (CN-).
Manipueira ends the toxic relationship between mercury, gold, and artisanal miners by introducing a scalable, sustainable plant-based state-of-the-art processing technology scientifically documented to recover → 99.3% of gold from ore concentrates and 99.6% from mercury-contaminated tailings in just two hours (Marcello M. Veiga & Pariya Torkaman, YouTube Video 2021).
Manipueira, which stinks when fermented, attracts insects, creates health threats, causes biodiversity destruction, contaminates the soil, drinking water, irrigation water contaminating the crops, and polluting the rivers.
In 2021, the global bitter cassava plant harvesting was estimated at 308 million tonnes (Blue Sense, 2023). According to P. Torkaman et al., 2021, 30 - 40% of the plants weight is the cassava wastewater containing aqueous free cyanide representing ~ 120 million tonnes of the Manipueira is recklessy discarded to the environment annually.
“The symbiosis of artisanal ore processors and flour makers is a win-win situation to reduce environmental pollution, health threats, and mitigating an unintended consequence of harvesting the bitter cassava plant” (P. Torkaman et al., 2021)