2) From the commercial point of view, it is proved that the base metal can be produced from the solution treated by biotechnology by using downstream technologies such as solvent extraction and electrodeposition;
3) The simplification of production technology reduces the initial investment and operation cost, shortens the construction time and is simple and convenient to maintain;
4) The production is carried out at normal pressure and room temperature (about 25 degrees Celsius) without cooling equipment, thus saving investment and operating funds;
5) The bioleaching waste is accepted by the environment, which saves the waste treatment cost and has few preventive measures;
6) Bacteria are easy to cultivate, can withstand changes in production conditions, have low requirements for water, and can dissolve 20,000 parts of solids in 1 million aqueous solutions.