E-waste miner Mint Innovation will start producing gold and copper from its Sydney plant next month, following a $NZ60million ($55 million) cash injection from the impact investing arm of Australian private equity firm Liverpool Partners.

The company, which was founded by the former vice president of external affairs at US carbon recycling technology player LanzaTech Will Barker, extracts the valuable metals from discarded electronic products and sells them back to manufacturers to be turned into new electronics, creating a circular economy of “green metals”.