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Updated: May 13, 2026
09:10
Experimental Protocol for Biodiesel Production with Isolation of Alkenones as Coproducts from Commercial Isochrysis Algal Biomass
Published on: June 24, 2016
Polyunsaturated fatty acid production by marine bacteria
Ahmed Abd Elrazak1, Alan C Ward, Jarka Glassey
1School of Chemical Engineering and Advanced Materials, Newcastle University, Newcastle Upon Tyne, UK, ahmed.abd-el-razak@newcastle.ac.uk.
Bioprocess and Biosystems Engineering
|March 26, 2013
Summary
Marine bacteria offer a sustainable source of eicosapentaenoic acid (EPA), an omega-3 fatty acid. Optimization of Vibrio cyclitrophicus cultivation conditions significantly enhanced EPA production for potential industrial applications.
Area of Science:
- Microbiology
- Biotechnology
- Nutritional Science
Background:
- Polyunsaturated fatty acids, including omega-3 and omega-6, are vital for human health.
- Current animal and plant-based sources of these fatty acids have limitations.
- Microbial production presents a promising alternative for sustainable fatty acid sourcing.
Purpose of the Study:
- To identify and optimize marine bacteria for eicosapentaenoic acid (EPA) production.
- To determine economically viable manufacturing conditions for microbial EPA synthesis.
- To enhance EPA yield from a selected marine bacterial isolate.
Main Methods:
- Gas chromatography-mass spectrometry (GC/MS) for EPA identification.
- 16S rRNA sequencing for bacterial identification (Vibrio cyclitrophicus).
- Statistical experimental designs (Plackett-Burman and Central Composite) for media and environmental factor optimization.
Main Results:
- Marine isolate 560 identified as an EPA producer, identified as Vibrio cyclitrophicus.
- Optimized media components (peptone, NaCl, yeast extract) predicted a yield of 4.8 mg/g dry weight.
- Bioreactor cultivation under optimized conditions (pH, DO) increased EPA production to 7.5 mg/g dry weight, representing 10% of total fatty acids.
Conclusions:
- Marine bacteria, specifically Vibrio cyclitrophicus, are viable producers of eicosapentaenoic acid (EPA).
- Statistical optimization significantly improved EPA yield, demonstrating the potential for cost-effective microbial production.
- Further research into process scale-up and strain improvement can lead to industrial-scale EPA manufacturing.
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