print small

Participating Countries:

Algeria

Argentina

Australia

Austria

Belgium

Bosnia and Herzegovina

Bulgaria

Croatia

Czech Republic

Denmark

Finland

France

FYR of Macedonia

Germany

Greece

Iceland

Ireland

Israel

Italy

Lithuania

Morocco

Netherlands

New Zealand

Poland

Portugal

Romania

Russian Federation

Serbia

Slovenia

Spain

Sweden

Switzerland

Turkey

Ukraine

United Kingdom

United States

Member area provided by LTFE
COST is supported by the EU Framework Programme Horizon 2020
This website is supported by COST

PEF assisted extraction of food-industry-relevant compounds from microalgae

STSM by Gianpiero Pataro, Researcher

Period of mission: from 27/02/2014 to 10/04/2014

Home institution: Prodal Scarl, Fisciano (SA) - Italy

Host institution: Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany

Microalgae biomass represents a rich source of valuable compounds, like lipids, proteins, polysaccharides, antioxidants and pigments, which are of considerable interest for pharmaceutical and food industry. Therefore, the extraction process of these compounds, which strongly depends on mass transfer phenomena through cell membrane of the microalgae, is a crucial step in order to enhance the yield and purity of the extracts. During this STSM, which was performed under the supervision of Dr. Wolfgang Frey, the influence of PEF pretreatments of different intensities on the extraction of valuable components relevant for food industry from microalgae was investigated. Culture of C. vulgaris strain inoculated in TAP-medium, were cultivated in batch 26 L photo-bioreactor. The algae were harvested after 18-24 days and concentrated up to a final biomass concentration of about 40-50 gdw/kgsus. PEF experiments of different intensities (E=27-35 kV/cm, and WT=50-150 kJ/kg) were carried out in a laboratory scale continuous flow unit. Determinations of time-conductivity profile as well as quantification of dry matter, protein content, total polyphenolics, and antioxidant activity of the supernatant were performed. Results showed a higher increase of the electrical conductivity of PEF treated suspension, when compared to the untreated sample: the higher the PEF treatment intensity, the higher the rate of release of ionic substances. Moreover, the PEF treatment significantly increased the dry matter content as well as the release of proteins from the inner part of the algae cells. Additionally, increments of total phenolics and antioxidant activity were also detected.


Project Office

Working groups

Steering Committee

Founding members

DC Rapporteurs

Related sites: