Balikpapan – Kalimantan Institute of Technology through the Scientific Paper Competition Indonesia Chemical Engineering Event (I-CHALLENGE) 2022, ITK Chemical Engineering Students won 2nd place. This activity was organized by the Chemical Engineering Student Association of the Faculty of Engineering, Universitas Brawijaya entitled "Technological Innovation in the Field of Energy Engineering and Biological Products in Realizing a Golden Indonesia 2045" from January 10 to March 5, 2022. In this competence, the paper from the work of students Ikram Al Fajri (Chemical Engineering '18) and Rifki Ardika (Chemical Engineering '18) Putra raised the title "Utilization of A. ferrooxidans Bacteria from Acid Mine Water Waste as Recovery of Lithium and Cobalt Metals".

The idea of a Paper on the Use of A. ferrooxidans Bacteria from Mine Acid Water Waste as a Recovery of Lithium and Cobalt Metals originated from previously conducting research with supervisors, namely Chemical Engineering Lecturer Asful Hariyadi S.T., M.Eng. Then interested in participating in this competition, where the theme of the competition is in accordance with the research that has been done.

Background of Innovation The use of Li-ion batteries is increasing as a resource that can store large amounts of energy, but can pose a serious threat to the environment and health because it contains heavy metals and toxic chemical compounds. The lithium and cobalt content in Li-ion batteries can be recycled with green technology through a bioleaching process with the help of microorganisms to have high efficiency, low cost, easy methods, and environmentally friendly. Strains of A. ferrooxidans bacteria in the bioleaching process isolated from acid mine water are able to extract lithium and cobalt on Li-ion batteries so that pure metal ions are obtained.

According to Ikram Al Fajri, et al., "The innovation project we propose is to isolate bacterial strains from the potential of local natural resources, namely acid mine water pools. which these bacteria are used to recover Lithium and Cobalt metals from used batteries. Lithium and Cobalt metals have a high selling price, which can be found in used electronic batteries. especially Cellphones and Laptops. Batteries that contain a lot of Lithium and Cobalt are Li-ion batteries. So it can be concluded that the innovation of our project is to utilize waste with waste."

"The hope is that for other ITK student friends, maybe the first time they dare to try first. Just participate in a competition that matches the field of interest. Don't be inferior to other campuses first. We can also compete anyway. Yo can yo." close Ikram.

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