Culture of Microalgae with Ultrafiltered Seawater: A Feasibility Study

Type Article
Date 2020-06
Language English
Author(s) Cordier Clémence1, Guyomard Killian2, Stavrakakis ChristopheORCID2, Sauvade Patrick3, Coelho Franz3, Moulin Philippe1
Affiliation(s) 1 : Aix Marseille Université, CNRS, Centrale Marseille, M2P2 UMR 7340, Equipe Procédés Membranaires (EPM), Europôle de l’Arbois, BP80, Pavillon Laennec, Hall C, 13545 Aix en Provence Cedex, France.
2 : Plateforme expérimentale Mollusques Marins, Station Ifremer de Bouin, Polder des Champs, 85230 Bouin, France.
3 : Suez - Aquasource, 20, Avenue Didier Daurat, 31029 Toulouse Cedex 04, France.
Source SciMedicine Journal (2704-9833) (Ital Publication), 2020-06 , Vol. 2 , N. 2 , P. 56-62
DOI 10.28991/SciMedJ-2020-0202-2
Keyword(s) Microalgae, Ultrafiltration, Water Purification, Shellfish Production

The culture of microalgae is important for the production and maintenance of bivalves. One of the major challenges is to maintain the reliability of microalgae forages over the long term. The aim of this work is to use Ultrafiltered (UF) seawater to cultivate them. Thus, cultures in a volume of 300 L of 2 species of microalgae Tetraselmis and T-isochrysis, were monitored in UF water (membrane pore size: 20 nm) and in sea water usually used on the Ifremer mollusk experimental platform of Bouin (France) (Prefiltration, 3 filtrations and 2 UV). The major result is the securing of microlagae cultures with the absence of parasites in all cultures supplied with ultrafiltered water, unlike analyses of the various control cultures. In the case of T-isochrysis, 3 cultures out of 4 resulted in higher microalgae concentrations, up to 30%, in ultrafiltered water thus bringing a benefit on the algal density. These conclusions and the ease of recovering water (linked to the reduction in treatment stages) allowed a transfer of technology. In fact the 300 L cultures hitherto carried out on the experimental platform are now produced in ultrafiltered water since early 2019.

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