Microalgae bulk growth model with application to industrial scale systems

Quinn, Jason C.; Winter, Lenneke de; Bradley, Thomas H.

doi:10.1016/j.biortech.2011.01.019

Cited by 165 publications

(108 citation statements)

References 30 publications

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“…Even if light dilution is considered properly, the effect of environmental factors on the PCE value like temperature-usually assumed as being from Arrhenius type [38]-diffuse light, and day length can hardly be anticipated. Growth-model-based attempts for extrapolation using local weather data or landscape characteristics have nevertheless been proposed [39,40] but not finally proven. Practical experiences are actually missing, whether the advantage of a higher irradiation of a maximum ratio of 2.5 between middle Europe and North Africa can really be exploited facing problems of temperature control, CO 2 and nutrition logistics and higher light dilution factors.…”

Section: Microalgae Cultivationmentioning

confidence: 99%

Composition of Algal Oil and Its Potential as Biofuel

Schlagermann

Göttlicher

Dillschneider

et al. 2012

Journal of Combustion

103

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First test flights using blends with algae oil are already carried out and expectations by the aviation and other industries are high. On the other hand technical data about performance of cultivation systems, downstream processing, and suitability of algae oil as fuel are still limited. The existing microalgae growing industry mainly produces for the food and feed market. Energy efficiency is so far out of scope but needs to be taken into account if the product changes to biofuel. Energy and CO 2 balances are used to estimate the potential of algae oil to fulfil the EU sustainability criteria for biofuels. The analysis is supported by lab tests as well as data gained by a pilot scale demonstrator combined with published data for well-known established processes. The algae oil composition is indicator of suitability as fuel as well as for economic viability. Approaches attaining high value fractions are therefore of great importance and will be discussed in order to determine the most intended market.

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Section: Microalgae Cultivationmentioning

confidence: 99%

Composition of Algal Oil and Its Potential as Biofuel

Schlagermann

Göttlicher

Dillschneider

et al. 2012

Journal of Combustion

103

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“…The PBR wall consists of polyethylene, which reflects 15% of the radiation incident on the bioreactor surface. For calculation of the light conditions inside the PBR, it was decided to use a volumetric averaged light intensity, which was calculated based on the solar radiation incident on the PBR surface and the light path through the PBR (Quinn et al, 2011). This method is based on the assumption that the algae are adapted to this averaged light intensity.…”

Section: Modelmentioning

confidence: 99%

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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“…[17,18,19]). More recently, modelling microalgal neutral lipid production has also been tackled [20,21,22]. Our approach is based on the work developed in [20], which has been slightly modified in order to include light effect [23].…”

Section: Model Presentationmentioning

confidence: 99%

Estimation of neutral lipid and carbohydrate quotas in microalgae using adaptive interval observers

Mairet

Moisan²,

Bernard

2013

Bioprocess Biosyst Eng

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Under stress conditions, microalgae are known to accumulate large amounts of neutral lipids and carbohydrates, which can be used for biofuel production. However, on-line measurement of microalgal biochemical composition is a difficult task which makes the microalgal process rather difficult to manage. In this paper, we propose a so called adaptive interval observer for the on-line estimation of neutral lipid and carbohydrate quotas in microalgae. The observer is based on a change of coordinates that involves a time-varying gain. We introduce dynamics for the gain, whose trajectory converges toward a predefined optimal value (which maximizes the convergence rate of the observer). The observer performance is illustrated with experimental data of Isochrysis sp. cultures under nitrogen limitations and day-night cycle. The proposed observer design appears to be a suitable robust estimation technique.

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Microalgae bulk growth model with application to industrial scale systems

Cited by 165 publications

References 30 publications

Composition of Algal Oil and Its Potential as Biofuel

Composition of Algal Oil and Its Potential as Biofuel

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

Estimation of neutral lipid and carbohydrate quotas in microalgae using adaptive interval observers

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