Fundamental Study on Biomachining. Machining of Metals by Thiobacillus ferrooxidans.

A study on copper micromachining using microorganisms

“…This result agrees with the number of bacteria for the same culture time presented by other researcher. 1 The change in mass of the Cu foil in bacterial solutions was used to quantify the MRR. For a control, a Cu foil sample was placed in medium without bacteria for six, 12 and 18 hours.…”

“…According to the approach used, machining processes can be classified as physical, chemical, or biological. 1 However, the use of biological processes in machining remains limited. Because environmental issues and the total machining cost are likely to have a significant impact on the widespread use of micromachining, alternative technologies are constantly being sought.…”

“…5 Moreover, because metabolic microorganisms are utilized, no damaged layer or heat-affected zone is generated in the machined surface. 1 The tools used in biomachining are commercially available and also renewable, because they can be cultured continuously. Thus, the concept of biomachining opens a new paradigm in manufacturing.…”

“…12 Acidithiobacillus ferrooxidans, formerly known as Thiobacillus ferrooxidans, was the species used in the preliminary biomachining work by some researchers. [1][2][3]5,11,12 In this study, A. ferrooxidans was also used. A scanning electron microscope (SEM) micrograph of a colony of these bacteria is shown in Fig.…”

Material Processing Using Microorganisms (2nd Report, Investigation on Biorecycling of Iron Red Rust)

“…However, their application in the fields of production and manufacturing engineering dealing mainly with metals has only recently begun with the development of antibacterial materials and attempts at biomachining (1), (2) . In general, various microbial actions and functions have been identified and categorized as (1) production of biogenetic materials, (2) bioaccumulation, (3) bioleaching, and (4) biocorrosion and biodeterioration (3) .…”