Ultrasonication assisted lipid extraction from oleaginous microorganisms

Area of Science:

• Biotechnology
• Microbiology
• Biochemistry

Background:

• Lipid extraction from oleaginous microorganisms is crucial for biofuel and oleochemical production.
• Conventional extraction methods are often time-consuming and energy-intensive.
• Optimizing extraction efficiency and reducing processing time are key challenges.

Purpose of the Study:

• To evaluate the efficiency of various solvents for lipid extraction from Trichosporon oleaginosus and fungal strain SKF-5.
• To compare ultrasonication-assisted extraction with conventional methods.
• To identify optimal conditions for rapid and efficient microbial lipid recovery.

Main Methods:

• Lipid extraction was performed using water, hexane, methanol, and chloroform/methanol (1:1 v/v) solvents.
• Ultrasonication was applied at frequencies of 520 kHz (40 W) and 50 Hz (2800 W).
• Results were compared against conventional chloroform/methanol (2:1 v/v) extraction.

Main Results:

• Ultrasonication with chloroform/methanol at 50 Hz and 2800 W achieved 100% lipid recovery from both fungal strains.
• This method required only 15 minutes at 25°C, significantly faster than the 12-hour conventional method at 60°C.
• Methanol and hexane also showed improved lipid recovery under ultrasonication compared to controls.

Conclusions:

• Ultrasonication-assisted chloroform/methanol extraction is a highly efficient and rapid method for recovering lipids from oleaginous fungi.
• This technique offers a promising, energy-saving alternative to conventional lipid extraction processes.
• The study highlights the potential of ultrasonication for industrial-scale microbial lipid production.