Abstract:To explore the bioleaching characteristics and process conditions of valuable metals in bioreactor which from waste printed circuit boards so as to promote the practical application of bioleaching technology, the designed batch mode bioleaching reactor and was used and strain Thiobacillus ferrooxidans Z1 was isolated, the optimum operation conditions of bioreactor was determined on the basis of investigation of bioleaching characteristics of valuable metals from waste printed circuit boards. The results showed that the optimum operation conditions of the reactor was: aeration rate 1L/min, retention time 30h, stirring speed 300r/min and powder dosages 12g/L. Under the conditions, 90.24% copper leaching efficiency was achieved in 101h. Meanwhile, 93.06% of magnesium, 85.59% of zinc, 85.59% of aluminium and 64.51% of nickel was bioleached in 197h, respectively. Therefore, the bioleaching reactor can effectively recover valuable metals in the waste printed circuit boards, which provided experimental evidence for the practical application of the technology.