Modeling Growth of Microalgae &lt;i&gt;Dunaliella Salina&lt;/i&gt; under Different Nutritional Conditions

BACKGROUND: In this study, the use of vegetable waste as a potential source of raw material for biofuel production was investigated. The microalga Chlorella vulgaris was used to maximize the production of lipids and carbohydrates. The culture medium was prepared with vegetable waste and diluted in the following proportions of medium:water: 1:0, 1:1, 1:2 and 1:3; the resulting solutions were adjusted for three different pH values (5.5, 7.2, 8.5). For a comparative analysis, modified CHU-10 medium was used.

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“…The average specific growth (μ) was calculated by the logistic model given by:

X_{[g . L^{- 1}]} = \frac{X_{m}}{1 + ([], ((), \frac{X_{m}}{X_{0}}) - 1) e^{- μ t}}

…”

Section: Methodsmentioning

confidence: 99%

Potential use of vegetable waste for biofuel production

Jesus

Santana

Ponce

et al. 2016

J of Chemical Tech & Biotech

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“…The compositions of these culture media are listed in Table 2. Note: Adapted from Jesus and Maciel Filho [28].…”

Section: Microalgal Cultivationsmentioning

confidence: 99%

Pigments Production, Growth Kinetics, and Bioenergetic Patterns in Dunaliella tertiolecta (Chlorophyta) in Response to Different Culture Media

et al. 2020

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This work dealt with the study of growth parameters, pigments production, and bioenergetic aspects of the microalga Dunaliella tertiolecta in different culture media. For this purpose, cultures were carried out in Erlenmeyer flasks containing F/2 medium, Bold’s Basal medium, or an alternative medium made up of the same constituents of the Bold’s Basal medium dissolved in natural seawater instead of distilled water. D. tertiolecta reached the highest dry cell concentration (Xmax = 1223 mgDM·L−1), specific growth rate (µmax = 0.535 d−1), cell productivity (PX = 102 mgDM·L−1·d−1), and photosynthetic efficiency (PE = 14.54%) in the alternative medium, while the highest contents of carotenoids (52.0 mg·g−1) and chlorophyll (108.0 mg·g−1) in the biomass were obtained in Bold’s Basal medium. As for the bioenergetic parameters, the biomass yield on Gibbs energy dissipation was higher and comparable in both seawater-based media. However, the F/2 medium led to the highest values of moles of photons absorbed to produce 1 C-mol of biomass (nPh), total Gibbs energy absorbed by the photosynthesis (ΔGa) and released heat (Q), as well as the lowest cell concentration, thus proving to be the least suitable medium for D. tertiolecta growth. On the other hand, the highest values of molar development of O2 and consumption of H+ and H2O were obtained in the alternative medium, which also ensured the best kinetic parameters, thereby allowing for the best energy exploitation for cell growth. These results demonstrate that composition of culture medium for microalgae cultivation has different effects on pigments production, growth kinetics, and bioenergetics parameters, which should be taken into consideration for any use of biomass, including as raw material for biofuels production.

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“…This cultivation consists of two stages: one stage for optimal biomass production and one nutrientlimiting stage for optimal β-carotene production. The growth of the microalgae was modeled using a logistic growth curve(Jesus & Filho, 2010). The parameters used in this study were based on multiple pilot scale outdoor cultivation studies of Dunaliella salina (García-González et al, 2003; Prieto et al, 2011; Tafreshi & Shariati, 2006; Wu et al, 2017).…”

mentioning

confidence: 99%

The potential of microalgae biorefineries in Belgium and India: An environmental techno-economic assessment

Thomassen

Dael

Passel

2018

Bioresource Technology

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This study performs an environmental techno-economic assessment (ETEA) for multiple microalgae biorefinery concepts at different locations, those being Belgium and India. The ETEA methodology, which integrates aspects of the TEA and LCA methodologies and provides a clear framework for an integrated assessment model, has been proposed and discussed. The scenario in India has a higher profitability with a NPV of €40 million over a period of 10 years, while the environmental impact in Belgium is lower. The inclusion of a medium recycling step provides the best scenario from both perspectives. The crucial parameters for feasibility are the β-carotene price and content, the upstream environmental impact of electricity and the maximum biomass concentration during cultivation. The identification of these parameters by the ETEA guides future technology developments and shortens the time-to-market for microalgal-based biorefineries.

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Modeling Growth of Microalgae <i>Dunaliella Salina</i> under Different Nutritional Conditions

Cited by 13 publications

References 17 publications

Potential use of vegetable waste for biofuel production

Potential use of vegetable waste for biofuel production

Pigments Production, Growth Kinetics, and Bioenergetic Patterns in Dunaliella tertiolecta (Chlorophyta) in Response to Different Culture Media

The potential of microalgae biorefineries in Belgium and India: An environmental techno-economic assessment

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