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Biofuels

Biofuels

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...

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Updated: Jun 10, 2026

Analysis of Fatty Acid Content and Composition in Microalgae

Analysis of Fatty Acid Content and Composition in Microalgae

Published on: October 1, 2013

A new tool to detect high viscous exopolymers from microalgae.

S Badel¹, F Callet, C Laroche

¹Laboratoire de Génie Chimique et Biochimique, Clermont Université, Université Blaise Pascal, Polytech' Clermont Ferrand, 24 avenue des Landais, Aubière Cedex, France.

Journal of Industrial Microbiology & Biotechnology

|July 17, 2010

Summary

The BioFilm Ring Test® can detect viscous exopolymers from microalgae like Rhodella violacea and Porphyridium purpureum. This tool offers a new method for analyzing these valuable, yet understudied, microbial polysaccharides.

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Area of Science:

Biotechnology
Microbiology
Polymer Science

Background:

Microalgae produce exopolymers, including polysaccharides, often forming a slime layer.
These exopolymers are valuable molecules but are poorly characterized in scientific literature.
Industrial applications of microalgal exopolymers are hindered by a lack of efficient detection methods.

Purpose of the Study:

To evaluate the BioFilm Ring Test® (BRT) as a tool for detecting viscous microalgal exopolymers.
To investigate the presence and characteristics of exopolymers in specific red microalgae and cyanobacteria strains.
To correlate exopolymer viscosity with the response observed using the BioFilm Ring Test®.

Main Methods:

Studied two red microalgal strains (Rhodella violacea, Porphyridium purpureum) and one cyanobacterium (Arthrospira platensis).
Analyzed their excreted polymeric fractions.
Utilized the BioFilm Ring Test® and performed rheological studies.

Main Results:

Rhodella violacea and Porphyridium purpureum showed positive responses with the BioFilm Ring Test®.
Arthrospira platensis did not induce a positive response in the BioFilm Ring Test®.
Rheological studies confirmed the involvement of fraction viscosity in the BRT response.

Conclusions:

The BioFilm Ring Test® is a viable tool for detecting viscous exopolymers from certain microalgae.
The study highlights differences in exopolymer production and properties among microalgal and cyanobacterial strains.
Understanding exopolymer viscosity is key to interpreting BioFilm Ring Test® results for microbial applications.