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Related Concept Videos

Biofuels01:25

Biofuels

108
The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
108

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Analysis of Fatty Acid Content and Composition in Microalgae
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Lipid estimation of microalgae via Finite element simulation using voltage discharging technique.

Kar Lok Chong1, Mohd Ridzuan Ahmad1

  • 1Department of Control and Mechatronics Engineering, Faculty of Electrical Engineering, Universiti Teknologi Malaysia 81310 Skudai, Johor, Malaysia.

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|September 28, 2025
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Summary

Microalgae lipids are key for biofuels. A new microfluidic method uses DC voltage to measure single-cell lipid content in Chlorella vulgaris, enabling efficient biofuel production.

Keywords:
Finite Element SimulationLipid estimationMicroalgae CellMicrofluidic design

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Area of Science:

  • Biotechnology
  • Bioenergy
  • Microfluidics

Background:

  • Fossil fuel depletion necessitates alternative energy sources.
  • Microalgae offer a sustainable solution for biofuel production due to high lipid content.
  • Accurate, single-cell lipid quantification is crucial for optimizing microalgae cultivation.

Purpose of the Study:

  • To develop a novel microfluidic approach for real-time, single-cell lipid estimation.
  • To utilize a DC voltage discharging technique for capacitive measurement of lipid accumulation.
  • To establish a correlation between capacitance measurements and lipid content in Chlorella vulgaris.

Main Methods:

  • A microfluidic device was designed for single-cell analysis.
  • A DC voltage discharging technique was employed for capacitive measurements.
  • Numerical simulations (COMSOL Multiphysics®) were used to model capacitance variations with lipid content.

Main Results:

  • Simulations showed significant capacitance differences correlating with lipid content.
  • A capacitance ratio (0.11–0.44) demonstrated a clear correlation with lipid content (0–50%).
  • Polynomial fitting achieved a high coefficient of determination (R² = 0.996), validating the simulation model.

Conclusions:

  • The proposed DC voltage discharging technique is a simple, cost-effective, and label-free method for single-cell lipid estimation.
  • This method provides a practical platform for advancing microalgae research.
  • The technique offers opportunities for scalable bioenergy applications through rapid lipid quantification.