Manufacturing Recycling of Metals in Button Batteries by Microorganisms

Recycling of metals from used button cell battery was explored. The culture supernatant of Aspergillus niger was used for leaching of metals. The 100% leaching of zinc (Zn) and silver (Ag) was obtained in 6 hours. The use of only culture supernatant supported the indirect leaching process. The organic acid produced by fungi acts as lixiviant aiding the metal leaching.