Related Experiment Video
Updated: Mar 25, 2026
15:28
Engineering Adherent Bacteria by Creating a Single Synthetic Curli Operon
Published on: November 16, 2012
15.1K
Biomachining: metal etching via microorganisms.
Estíbaliz Díaz-Tena1, Astrid Barona1, Gorka Gallastegui1
1a Department of Chemical and Environmental Engineering and.
Critical Reviews in Biotechnology
|February 27, 2016
Summary
Biological machining (biomachining) uses microorganisms for sustainable metal removal, offering low energy consumption and no thermal damage. Optimizing parameters like cell density, temperature, pH, and time is crucial for high-quality micro-component production.
Area of Science:
- Biotechnology
- Materials Science
- Manufacturing Engineering
Background:
- Biological machining (biomachining) is an emerging technique utilizing microorganisms for metal removal.
- It presents a sustainable, low-energy alternative to traditional mechanical methods, avoiding thermal damage.
Purpose of the Study:
- To assess the performance of biomachining, focusing on material removal rate and surface finish.
- To identify key parameters influencing the biomachining process for effective micro-component manufacturing.
Main Methods:
- Controlled experiments varying parameters such as microorganism type and density, temperature, shaking rate, pH, and biomachining time.
- Analysis of material removal rate and surface finish to determine optimal process conditions.
Main Results:
- Biomachining performance is highly dependent on specific metal types and requires case-by-case parameter optimization.
- Key controllable factors include cell concentration, temperature, shaking rate, and maintaining an acidic pH.
- The process is effective for creating intricate micropatterns on various metal surfaces.
Conclusions:
- Biomachining offers a sustainable and effective method for producing high-quality micro-components, meeting global demand.
- Further research and development are needed for its successful industrial-scale implementation.
Related Concept Videos
01:27Microbial Leaching
25
Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...
25
01:24Microbial Corrosion
16
Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...
16
01:30Environmental Applications of Microorganisms
1.4K
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
1.4K
01:25Microbial Bioremediation of Uranium
18
Microorganisms play a critical role in the transformation and immobilization of uranium in contaminated environments through four main pathways: bioreduction, biosorption, bioaccumulation, and biomineralization. These mechanisms reduce uranium’s toxicity and prevent its migration through groundwater systems, offering sustainable approaches for in situ bioremediation.Bioreduction of UraniumBioreduction is driven by anaerobic bacteria such as certain strains of Geobacter and Shewanella,...
18
01:24Microbes and Other Elemental Cycles
42
Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
42
01:26Microbial Bioremediation of Hydrocarbons
23
Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to...
23