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Green recovery of Cu-Ni-Fe from a mixture of spent PCBs using adapted a. ferrooxidans in a bubble column bioreactor
, Article Separation and Purification Technology ; Volume 272 , 2021 ; 13835866 (ISSN) ; Pourhossein, F ; Mousavi, M ; Yaghmaei, S ; Sharif University of Technology
Elsevier B.V
2021
Abstract
The high amount of base metals poses an important challenge in gold bioleaching from spent printed circuit boards (PCBs). This study aims to investigate the bioleaching of important base metals (Cu, Ni, and Fe) from a mixture of spent PCBs (E-waste) using adapted Acidithiobacillus ferrooxidans in the bubble column bioreactors. Firstly, the adaptation process is done from 1 to 15 g/L in Erlenmeyer flasks in 187 days, then the concentration of E-waste increased to 40 g/L in bubble column bioreactors in 44 days. The concurrent recovery of copper, nickel, and iron using adapted bacterium in a bioreactor was optimized by central composite design. Various effective parameters such as aeration...