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Spent brewer’s yeast as a selective biosorbent for metal recovery from polymetallic waste streams (www.frontiersin.org)

biosorption brewer's yeast metal recovery sustainable technology e-waste management

This study introduces a sustainable approach using spent brewer’s yeast as a biosorbent for the selective recovery of valuable metals from polymetallic waste streams. By adjusting pH levels in a stepwise manner, it’s possible to selectively and efficiently recover metals such as aluminum, copper, zinc, and nickel. Furthermore, the process allows for the recycling and repeated use of yeast biomass, marking it as a cost-effective and eco-friendly solution for addressing the challenges of metal recovery from e-waste.
Main Points
- Potential of spent brewer's yeast in metal recoverySpent brewer's yeast, particularly Saccharomyces cerevisiae, is identified as a potent biosorbent for the recovery of metals like aluminum, copper, zinc, and nickel from polymetallic waste streams, including e-waste.
- Introduction of a stepwise pH-adjustment biosorption processThe study presents a novel, sustainable, and cost-effective method for selective metal recovery by adjusting the solution pH stepwise, allowing for the targeted adsorption of different metals.
- Recycling and reusing yeast biomass enhances sustainabilityThe reuse of yeast biomass for multiple cycles of biosorption demonstrates the process’s economic advantage and environmental benefit, contributing to sustainable waste management practices.
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