Modelling of growth of Porphyridium cruentum in connection with two interdependent factors: Light and temperature

Dermoun, Djamila; Chaumont, D.; Thébault, Jean-Marc; Dauta, A.

doi:10.1016/0960-8524(92)90069-a

Cited by 59 publications

(23 citation statements)

References 21 publications

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“…This was because the light-saturation irradiance occurs typically at roughly 30% of the nonlimiting irradiance level for microalgae. Indeed the irradiance value above which photosynthesis is not limited by light has been reported for P. cruentum as 400-550 lE m -2 s -1 [43] and 700 lE m -2 s -1 [44]. As expected, this value is roughly 2-3 times the light-saturation constant for P. cruentum.…”

Section: Resultssupporting

confidence: 57%

Effects of agitation on the microalgae Phaeodactylum tricornutum and Porphyridium cruentum

Sobczuk

Camacho

Grima

et al. 2005

Bioprocess Biosyst Eng

137

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The effect of mechanical agitation on the microalgae Phaeodactylum tricornutum and Porphyridium cruentum was investigated in aerated continuous cultures with and without the added shear protectant Pluronic F68. Damage to cells was quantified through a decrease in the steady state concentration of the biomass in the photobioreactor. For a given aeration rate, the steady state biomass concentration rose with increasing rate of mechanical agitation until an upper limit on agitation speed was reached. This maximum tolerable agitation speed depended on the microalgal species. Further increase in agitation speed caused a decline in the steady state concentration of the biomass. An impeller tip speed of >1.56 m s(-1) damaged P. tricornutum in aerated culture. In contrast, the damage threshold tip speed for P. cruentum was between 2.45 and 2.89 m s(-1). Mechanical agitation was not the direct cause of cell damage. Damage occurred because of the rupture of small gas bubbles at the surface of the culture, but mechanical agitation was instrumental in generating the bubbles that ultimately damaged the cells. Pluronic F68 protected the cells against damage and increased the steady state concentration of the biomass relative to operation without the additive. The protective effect of Pluronic was concentration-dependent over the concentration range of 0.01-0.10% w/v.

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Section: Resultssupporting

confidence: 57%

Effects of agitation on the microalgae Phaeodactylum tricornutum and Porphyridium cruentum

Sobczuk

Camacho

Grima

et al. 2005

Bioprocess Biosyst Eng

137

View full text Add to dashboard Cite

show abstract

“…temperature and irradiance, which are in essence forms of thermal and radiant energy). In terms of physical "substrates", light and temperature have been widely accepted as the driving factors acting on overall biochemical composition in algal cultures (Dermoun et al 1992;Trabelsi et al 2008). Light is essential for autotrophic organisms to obtain chemical energy, stored in reduced carbon compounds (Dubinsky et al 1995), whereas the effects of temperature on cell cultures concern mainly two factors: one relates to the temperature dependence of the structure of cell components (especially proteins and lipids), and the other pertains to the temperature dependence of reaction rates, which in turn depend on the activation energies of those reactions.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous effect of irradiance and temperature on biochemical composition of the microalga Pavlova lutheri

2009

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The biochemical composition of microalgae can be modulated through the environmental conditions prevailing during growth. The simultaneous effects of irradiance and temperature on the biochemical composition of Pavlova lutheri were evaluated using an experimental star factorial design. Five levels were tested for each parameter (temperature, 10, 14, 18, 22 and 26°C; irradiance, 60, 105, 150, 195 and 240 μmol photons m −2 s −1 ), whereas the carbohydrate, protein, lipid, pigments and elementary compound contents were measured as response variables. Additionally, in order to rapidly measure parameters to define the status of the culture, the validation of the relationships between biochemical parameters and physiological status were estimated through regression analysis. It was observed that irradiance and temperature play a major role in the determination of the biochemical composition of microalgae. Their effects are synergistic, and it can be observed that a trend in behaviour at a certain temperature can be reversed at a different temperature; therefore, when selecting the environmental conditions to a culture they must be studied in a combined fashion. Although there are consistent relationships between pigment contents and elementary compounds in cells, its linearity is influenced by the irradiance of the culture and its age; therefore, they can only be applied in specific circumstances. On the other side, population biomass was well estimated in terms of carotenoid content, irrespective of the environmental conditions provided and the growth phase.

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“…Tittel et al (2005) indicate that it is typical for phototrophically grown algae that they exhibit negative growth rates due to maintenance respiration, when light intensities are below the compensation point. In the used algal growth rate model of Dermoun et al (1992) negative growth never occurs, which is unrealistic. Especially under low-light conditions in "Integrated production", productivity of the PBR will thus be overestimated.…”

Section: Discussion Conclusion and Recommendationsmentioning

confidence: 99%

“…Especially under low-light conditions in "Integrated production", productivity of the PBR will thus be overestimated. Besides that, the model of Dermoun et al (1992) was specifically developed for the algal species Porphyridium Cruentum. Every algal species has its own growth characteristics, which means that this model certainly is not representative for all algae species.…”

Section: Discussion Conclusion and Recommendationsmentioning

confidence: 99%

“…In the current study, an empirical model was chosen which describes the growth of the red alga Porphyridium cruentum, influenced by temperature and radiation. As described by Dermoun et al (1992), temperature and light are certainly two of the main factors acting on overall biomass productivity in algal mass-culture systems. Non-limited nutrient conditions, non-limiting O 2 and CO 2 concentrations, ideal pH and a perfectly mixed system were assumed.…”

Section: Modelmentioning

confidence: 99%

See 1 more Smart Citation

Feasibility Study on Combined Production of Algae and Tomatoes in a Dutch Greenhouse

Slager¹,

Σαπουνάς²,

Henten³

et al. 2012

Acta Hortic.

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The Dutch horticultural sector shows interest in production of microalgae. When microalgae and a tomato crop are produced in the same greenhouse, both shared advantage of and competition for resources will occur. In this study a model was developed to predict algae biomass production in tubular photobioreactors (PBR) and to assess the economic feasibility of combined production of tomatoes and algae. The effects of the location of the PBR in the greenhouse, the diameter of the PBR tubes, the algae biomass concentration, the light intensity and the PBR temperature were considered. The economic feasibility of combined production was calculated, taking into account both investment and running costs. Three possible locations for the PBRs were considered. The most sensitive growth factor influencing economics of the systems was light. Economic feasibility of algae production underneath the tomato crop was poor; a minimum unit biomass production cost of 70 € kg -1 dry matter (DM) was calculated. Increasing the light intensity by decrease of the tomato LAI through extra leaf picking increases economic feasibility of algae production underneath the crop. Economic feasibility of algae production in a separated compartment was computed to be good with a minimum unit biomass production cost of 11 € kg -1

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Modelling of growth of Porphyridium cruentum in connection with two interdependent factors: Light and temperature

Cited by 59 publications

References 21 publications

Effects of agitation on the microalgae Phaeodactylum tricornutum and Porphyridium cruentum

Effects of agitation on the microalgae Phaeodactylum tricornutum and Porphyridium cruentum

Simultaneous effect of irradiance and temperature on biochemical composition of the microalga Pavlova lutheri

Feasibility Study on Combined Production of Algae and Tomatoes in a Dutch Greenhouse

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