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Productivity and biochemical composition of Phaeodactylum tricornutum (Bacillariophyceae) cultures grown outdoors in tubular photobioreactors and open ponds (Articolo in rivista)

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Productivity and biochemical composition of Phaeodactylum tricornutum (Bacillariophyceae) cultures grown outdoors in tubular photobioreactors and open ponds (Articolo in rivista) (literal)

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Ana Margherita Silva Benavides; Giuseppe Torzillo; Jirka Kopecky; Jiri Masoj?dek (2013)
Productivity and biochemical composition of Phaeodactylum tricornutum (Bacillariophyceae) cultures grown outdoors in tubular photobioreactors and open ponds
in Biomass & bioenergy
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Ana Margherita Silva Benavides; Giuseppe Torzillo; Jirka Kopecky; Jiri Masoj?dek (literal)

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Silva Benavides, Ana Margherita: Escuela de Biologia, Universidad de Costa Rica, San Pedro, San Jose´ 2060, Costa Rica b Centro de Investigacion en Ciencias del Mar y Limnolog?´a (CIMAR), Ciudad de la Investigacion, Universidad de Costa Rica, San Pedro, San Jose' 2060, Costa Rica Torzillo, Giuseppe: CNR-ISE, Sede distaccata di Firenze Kopecky, Jirka: Institute of Microbiology, Academy of Sciences, Opatovicky mlyn, CZ-37981 Trebon, Czech Republic and Faculty of Science, University of South Bohemia, Branisovska´ 31, CZ-37005 Ceske´ Budejovice, Czech Republic Masoj?dek, Jiri: Institute of Microbiology, Academy of Sciences, Opatovicky mlyn, CZ-37981 Trebon, Czech Republic and Faculty of Science, University of South Bohemia, Branisovska´ 31, CZ-37005 Ceske´ Budejovice, Czech Republic (literal)

Titolo

Productivity and biochemical composition of Phaeodactylum tricornutum (Bacillariophyceae) cultures grown outdoors in tubular photobioreactors and open ponds (literal)

Abstract

In this study we compared the biomass productivity and the chemical composition of the diatom Phaeodactylum tricornutum grown outdoors at different biomass concentrations, in open ponds and photobioreactors (PBRs). Optimal biomass concentration of 0.6 g L?1 and 1.0 g L?1 was found in open ponds and in PBRs, respectively. During summer the mean net areal biomass yield was 11.7 g m?2 day?1 and 13.1 g m?2 day?1 in open ponds and in PBRs, respectively. Night biomass loss was comparable (17.4% and 21.4% of the daylight productivity, in open ponds, and PBRs, respectively). Lipid content ranged between 25% and 27.5% of dry weight, and increased up to 34.7% of biomass grown in dense cultures (>0.6 g L?1 in ponds; >1.0 g L?1 in PBRs). In the evening they ranged between 21% and 31%, while a reduced amount was found in the morning e between 14.5% and 24%. An induction of the diadinoediatoxanthin cycle was observed in the cultures when they were grown at lower biomass concentrations, particularly in cultures grown in photobioreactors, indicating down-regulation of the photosynthetic apparatus due to high irradiance, which was confirmed by a sizeable reduction in the Fv/Fm ratio in the middle of day. It was found that the productivity of cultures was higher in photobioreactors compared to that in open ponds most likely as a result of a better lightedark regime experienced by the cells in short light-path tubular PBRs, which may have allowed a more efficient use of light. (literal)

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