Microbial electrochemical recovery of zinc
Artikel i vetenskaplig tidskrift, 2017

Electrolytic recovery of zinc (Zn) from aqueous solutions is an energy intensive process carried out using highly concentrated Zn2+ solutions. To reduce the energy consumption and make Zn recovery possible from dilute waste streams, a more energy-efficient process is needed. In this study, we tested a microbial electrolysis cells for Zn recovery from acidic solutions. The reactors contained biological anodes that generated current by oxidizing acetate. The reactors were operated with either controlled anode potential or controlled cathode potential. During operation with controlled anode operation, the energy efficiency for Zn recovery was highly variable and depended on the biologically generated current and the Zn2+ concentration in the catholyte. During operation with controlled cathode potential, a relatively stable energy consumption of 0.59–0.72 kWh kg−1 Zn was obtained. This was about three times lower than the energy consumption for Zn recovery under abiotic conditions.

Författare

Oskar Modin

Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik

Nafis Fuad

Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik

Sebastien Rauch

Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik

Electrochimica Acta

0013-4686 (ISSN)

Vol. 248 58-63

Drivkrafter

Hållbar utveckling

Styrkeområden

Building Futures

Livsvetenskaper och teknik

Ämneskategorier

Vattenteknik

Annan miljöbioteknik

DOI

10.1016/j.electacta.2017.07.120