Scientists have figured out a way to use the leftovers from brewing beer to remove heavy metals from electrical recycling waste.The metal waste that comes from the recycling of electrical products is notoriously difficult to treat, as the mixture of metals is complicated to separate.Now, however, brewer's yeast may be used to filter out the metals from the electrical waste streams, according to a new paper in the journal Frontiers in Bioengineering and Biotechnology.
When the yeast was used on a mock metal waste stream, akin to one from an electrical recycling plant, over 50 percent of copper and 90 percent of zinc were retrieved.'Using waste biomass for metal recovery is not a completely new process, but the selectivity of biosorption processes is a key factor for efficient metal recovery from polymetallic waste streams,' paper author Anna Sieber, a fellow at Austrian metallurgical research center K1-MET, said in the statement.
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