Selection of optimum process parameters of biomachining for maximum metal removal rate

Muhammad, Imran; Sahar, Muhammad Sana Ullah; Han, Do Sup; Ko, Tae Jo

doi:10.1007/s40684-015-0037-4

Cited by 26 publications

(5 citation statements)

References 13 publications

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“…The ferrous ion oxidation rate was higher in those samples with higher ferrous ion concentration, probably due to the fact that increasing amounts of Fe 2+ resulted in greater densities of cells that are able to transform more Fe 2+ ions into Fe 3+ . 9 The linearity between initial ferrous ion concentration and its oxidation rate found in this study is not fully supported in the literature. Thus, Danis et al 31 observed that increasing Fe 2+ concentrations up to 2.6 g L −1 gave increased Fe 3+ levels, but higher ones led to lower Fe 3+ concentrations.…”

Section: Acs Sustainable Chemistry and Engineeringcontrasting

confidence: 78%

“…Each experiment was performed in duplicate, and the mean results were used. The copper removal rate (MRR) achieved was calculated as follows: …”

Section: Methodsmentioning

confidence: 99%

“…Copper biomachining via indirect mechanism typically involves two consecutive stages. 9 Initially, chemolithotrophic and acidophilic bacteria are grown using the energy generated by the oxidation of ferrous ions into ferric ions (Reaction R1), and in a second step, the biogenic ferric ion causes the dissolution of copper metal present in the bacterial medium (Reaction R2).…”

Section: ■ Introductionmentioning

confidence: 99%

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Simultaneous Culture and Biomachining of Copper in MAC Medium: A Comparison between Acidithiobacillus ferrooxidans and Sulfobacillus thermosulfidooxidans

Díaz-Tena

Gallastegui

Hipperdinger

et al. 2018

ACS Sustainable Chem. Eng.

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Biomachining will not be considered as a full-scale manufacturing technology until a stable, controlled and continuous metal removal rate (MRR) is achieved. In this research work, a novel strategy that could promote its industrial implementation, namely simultaneous bacterial growth and machining of copper contained in oxygen-free copper (OFC) workpieces, was investigated. This proposal has the major advantage of being a single-stage process, thereby reducing total operating times and becoming more economical in comparison with conventional biomachining (downtime due to bacterial growth would disappear). The study was carried out using mesophilic (Acidithiobacillus ferrooxidans) and thermophilic (Sulfobacillus thermosulfidooxidans) extremophile bacteria in order to prevent the progressive decrease in the amount of metal removed per unit time. A constant MRR of 43 mg h-1 was achieved with A. ferrooxidans in the simultaneous process. Despite the accomplishment of a constant MRR, this value is lower than the maximum MRR obtained in conventional biomachining (109 mg h-1), probably due to the inability of ferric ions to come into contact with the metallic surface. With regard to the culture period in MAC medium, S. thermosulfidooxidans showed a slower growth rate (0.11 h-1) and lower ferrous ion oxidation level (0.12 g Fe 2+ L-1 h-1) than A. ferrooxidans (0.17 h-1 and 0.22 g Fe 2+ L-1 h-1 , respectively) under optimal pH (1.5) and Fe 2+ concentration (6 g L-1) conditions.

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Section: Acs Sustainable Chemistry and Engineeringcontrasting

confidence: 78%

“…Each experiment was performed in duplicate, and the mean results were used. The copper removal rate (MRR) achieved was calculated as follows: …”

Section: Methodsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Simultaneous Culture and Biomachining of Copper in MAC Medium: A Comparison between Acidithiobacillus ferrooxidans and Sulfobacillus thermosulfidooxidans

Díaz-Tena

Gallastegui

Hipperdinger

et al. 2018

ACS Sustainable Chem. Eng.

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“…In contrast, Wirawan et al [71] reported the density of the sugarcane bagasse reinforced poly (vinyl chloride) is decrease by increasing the fibre loading. The low density of NFRPC has resulted in this material being preferred across the world, especially in the automotive and building industries [72,73]. Recent studies mentioned that the density of NFRPC is between 1.1 and 1.6 g/cm 3 [74,75].…”

Section: Final Natural Fibre Reinforced Polymer Composite For Hand-brmentioning

confidence: 99%

Material Selection of a Natural Fibre Reinforced Polymer Composites using an Analytical Approach

Muhammad¹,

Sapuan²,

Mastura³

et al. 2019

Journal of Renewable Materials

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Material selection has become a critical part of design for engineers, due to availability of diverse choice of materials that have similar properties and meet the product design specification. Implementation of statistical analysis alone makes it difficult to identify the ideal composition of the final composite. An integrated approach between statistical model and micromechanical model is desired. In this paper, resultant natural fibre and polymer matrix from previous study is used to estimate the mechanical properties such as density, Young's modulus and tensile strength. Four levels of fibre loading are used to compare the optimum natural fibre reinforced polymer composite (NFRPC). The result from this analytical approach revealed that kenaf/polystyrene (PS) with 40% fibre loading is the ideal composite in automotive component application. It was found that the ideal composite score is 1.156 g/cm 3 , 24.2 GPa and 413.4 MPa for density, Young's modulus and tensile strength, respectively. A suggestion to increase the properties on Young's modulus are also presented. This work proves that the statistical model is well incorporated with the analytical approach to choose the correct composite to use in automotive application.

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“…The MRR of enzymatic machining using glucose with copper for 10 h was analysed. The enzymatic MRR is linear with time by adjusting the reaction time [26]. Based on previous studies [15,16], bacterial concentration is one of the essential parameters during bio-machining to obtain a better removal rate and surface finish for some specified applications [27].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Bio-Machining of Nickel, Titanium and Nitinol (Shape Memory Alloys) Using Acidithiobacillus ferrooxidans Microorganisms

et al. 2023

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Micromachining plays a vital role in the manufacturing industry in producing microcomponents with high sensitivity and fine dimensional tolerances for implant materials in medical applications. Micro-machining can be carried out through various machining processes like physical, chemical and biological processes, although the use of biological machining is limited. In biological machining, microorganisms are used as a source of energy to machine the components, and machining with microorganism brings a lot of advantages in the machining process like the production of components with lower energy resources, low cost, no heat-affected zone and fine dimensional tolerances, which makes it suitable for machining implant materials. In other machining process like conventional and unconventional machining processes, the heat-affected zone, dimensional tolerances and environmental-related problems are the major issues, as these processes generate more heat while machining. This damages the material, which will not be able to be used for certain applications, and this issue can be overcome by bio-machining. In this present work, nickel, titanium and nitinol are manufactured using the powder metallurgy technique. They are manufactured as a 10 mm diameter and 5 mm thick pellet. The fabricated nickel, titanium and nitinol shape memory alloys are machined with Acidithiobacillus ferrooxidans microorganisms to obtain a better material removal rate and surface roughness and to check the bio-machining performance by considering various parameters such as shaking speed, temperature, pH and percentage of ferric content for the future scope of biomedical applications. Considering these parameters, microorganisms play a vital role in the temperature, shaking speed and time of the bio-machining process, and it was observed that a better material removal rate and surface roughness are achieved at a temperature of 30 °C, shaking speed of 140 rpm and machining time of 72 h.

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Selection of optimum process parameters of biomachining for maximum metal removal rate

Cited by 26 publications

References 13 publications

Simultaneous Culture and Biomachining of Copper in MAC Medium: A Comparison between Acidithiobacillus ferrooxidans and Sulfobacillus thermosulfidooxidans

Simultaneous Culture and Biomachining of Copper in MAC Medium: A Comparison between Acidithiobacillus ferrooxidans and Sulfobacillus thermosulfidooxidans

Material Selection of a Natural Fibre Reinforced Polymer Composites using an Analytical Approach

Experimental Investigation on Bio-Machining of Nickel, Titanium and Nitinol (Shape Memory Alloys) Using Acidithiobacillus ferrooxidans Microorganisms

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