Kinetics and energetics of photosynthetic micro-organisms in photobioreactors

Cornet, Jean‐François; Dussap, Claude-Gilles; Gros, Jean‐Bernard

doi:10.1007/bfb0102299

Cited by 85 publications

(161 citation statements)

References 72 publications

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“…One assumption is classical, considering energy metabolism in cyanobacteria (Cornet et al, 1998;Fay and Van Baalen, 1987;Vonshak, 1997), i.e., the expression of all reducing power as NAD(P)H,H + taking all reducing compounds (NADH,H + or NADPH,H + ) as equivalent, although only NADPH,H + is known to be regulated by photosynthesis.…”

Section: Energy Metabolismmentioning

confidence: 99%

“…Macromolecular composition (% total dry weight) of Arthrospira platensis cells grown under photoautotrophic conditions (Cornet, et al 1998;Vonshak, 1997 . The electron transport is coupled to ATP synthesis with the possibility of additional cyclic phosphorylation by deviation of electrons from ferredoxin to cytochrome b 6 f-complex.…”

Section: Energy Metabolismmentioning

confidence: 99%

“…Cellular composition of A. platensis was established from literature data. For the composition of the main components of cell material (proteins, carbohydrates, lipids, and nucleic acids), we adopted values given by Cornet et al (1998). Also, the biosynthesis of chlorophyll was taken into account and estimated (1% of cellular dry weight) using values reported by Vonshak (1998) (Table I).…”

Section: Composition Of Cell Constituentsmentioning

confidence: 99%

“…It has been shown that the percentage of EPS produced varies with light intensity. Under physical limitation by light, this percentage is increased with the light energy available (Cornet et al, 1992(Cornet et al, , 1998Filali Mouhim et al, 1993), leading to important changes in the conversion yields of substrates into products. A limit in EPS production was observed.…”

Section: Introductionmentioning

confidence: 96%

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Identification of a metabolic network structure representative of arthrospira (spirulina) platensis metabolism

Cogne

Gros

Dussap

2003

Biotech & Bioengineering

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A comprehensive network structure for the autotrophic growth of Arthrospira platensis is proposed. The metabolic network was built up with 121 reactions and 134 metabolites including biomass synthesis, production of a growth-associated exopolysaccharide, and energy aspects. The model supports the existence of a metabolic shunt of PEP to pyruvate through PEP carboxylase, NAD(+)-dependent malate dehydrogenase and malic enzyme to convert NADH,H(+) into NADPH,H(+). A limit in Arthrospira growth metabolism due to NADH,H(+) balancing is evidenced, explaining why the maximal light-dependent mass yield of the growth-associated exopolysaccharide was 0.51 kg EPS kg(-1) biomass, consistent with experimental results.

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Section: Energy Metabolismmentioning

confidence: 99%

Section: Energy Metabolismmentioning

confidence: 99%

Section: Composition Of Cell Constituentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

See 2 more Smart Citations

Identification of a metabolic network structure representative of arthrospira (spirulina) platensis metabolism

Cogne

Gros

Dussap

2003

Biotech & Bioengineering

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“…(11) The performance of mixing can be analyzed by computing the hydrodynamic properties of the pond (Reynolds number, dead zone areas, and shear rate) that are significantly influenced by the pond geometry. (12,13) With advancements in computational fluid dynamics (CFD) codes, modeling hydrodynamic flow conditions under the influence of various geometrical features is now possible. Numerous numerical studies have been conducted to observe the effects of various central wall designs on the flow-mixing of algae cells in raceway ponds.…”

Section: Introductionmentioning

confidence: 99%

Particle Image Velocimetry Measurement of Hydrodynamic Properties of Raceway Pond with theEffect of Central Wall

2016

Sensors and Materials

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Raceway ponds with paddle wheel mixing are the most common choice for microalgae cultivation because they allow better interaction of algae cells with water, nutrients, and CO 2 . A central wall splits the algal pond into two channels, which significantly affects hydrodynamic properties of the pond. This study used the particle image velocimetry (PIV) technique to experimentally investigate the effects of the central-wall-end designs on the fluid properties of a laboratory-scale raceway pond. The rectangular and round ends of the central wall were compared using a velocity field, the Reynolds number, power consumption, and microeddy length. Flow circulation was found to be more effective in the round end model because of the smaller recirculation size and smaller dead zones. Mixing was improved by using a central wall with round ends. Power consumption was influenced by velocity, and the round-end model consumed less power during mixing. Higher turbulent mixing resulted in shorter microeddies that could damage the boundaries of the algae cells.

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Bioreactors, Photo

Tredici¹

1999

Encyclopedia of Bioprocess Technology

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Kinetics and energetics of photosynthetic micro-organisms in photobioreactors

Cited by 85 publications

References 72 publications

Identification of a metabolic network structure representative of arthrospira (spirulina) platensis metabolism

Identification of a metabolic network structure representative of arthrospira (spirulina) platensis metabolism

Particle Image Velocimetry Measurement of Hydrodynamic Properties of Raceway Pond with theEffect of Central Wall

Bioreactors, Photo

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