Effect of Temperature and Nutrient Limitation on the Growth and Lipid Content of Three Selected Microalgae (&lt;i&gt;Dunaliella tertiolecta&lt;/i&gt;, &lt;i&gt;Nannochloropsis&lt;/i&gt; sp. and &lt;i&gt;Scenedesmus&lt;/i&gt; sp.) for Biodiesel Production

Rukminasari, Nita

doi:10.5376/ijms.2013.03.0017

Cited by 11 publications

(14 citation statements)

References 41 publications

(53 reference statements)

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“…This effect was more obvious under optimized conditions as observed in Figure . As reported by Rukminasari (), the maximum cell concentration was 792 × 10 4 cells · mL −1 for Nannochloropsis sp. The volumetric productivities of 0.747 mg · L −1 · d −1 and 0.679 mg · L −1 · d −1 , which corresponded to the specific growth rates of 0.250 and 0.226 d −1 , were obtained for Nannochloropsis sp.…”

Section: Resultssupporting

confidence: 80%

Process optimization and modeling for the cultivation of Nannochloropsis sp. and Tetraselmis striata via response surface methodology

İmamoğlu

Demirel

Dalay

2015

Journal of Phycology

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The aim of this study was to determine the optimal physical process conditions for the cultivation of locally isolated strains of Nannochloropsis sp. and Tetraselmis striata to achieve maximum growth rate. It was essential to evaluate biomass production at different agitation rates, light intensities, and temperature levels. Central composite design and response surface methodology were applied to design the experiments and optimize the cultivation process for Nannochloropsis sp. and T. striata. The specific growth rate of 0.250 d(-1) was obtained for Nannochloropsis sp. cells under the light intensity of 54 μmol photons · m(-2) · s(-1) , at the agitation rate of 151 rpm in 24.5°C. The optimal physical process conditions for T. striata were obtained under the light intensity of 56 μmol photons · m(-2) · s(-1) in 25.5°C at the agitation rate of 151 rpm in 25.5°C, resulting in a specific growth rate of 0.226 d(-1) . The predicted values were justified by the verification tests. Good agreement between the predicted values and the experimental values confirmed the validity of the models for the cultivation of microalgal strains. In this article, the noteworthy result was that temperature was a dominant factor in obtaining high chl-a content for Nannochloropsis sp., whereas the growth of T. striata strongly depended on light exposure.

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Section: Resultssupporting

confidence: 80%

Process optimization and modeling for the cultivation of Nannochloropsis sp. and Tetraselmis striata via response surface methodology

İmamoğlu

Demirel

Dalay

2015

Journal of Phycology

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“…Similar to Spirulina sp, the abundance of Skeletonema sp microalgae is also more responsive to changes in NO3 concentrations in the medium than with the increase in temperature. This is evidenced by the apparent difference in Skeletonema abundance between nutrient treatment at all time calculations (Table 2) and this finding is consistent with previous research by Rukminasari (2013).…”

Section: The Abundance Of Skeletonema Sp and Spirulina Sp During Thsupporting

confidence: 92%

“…Based on the results of this study it shows that in general the availability of nutrients, especially NO3 directly affect the abundance of microalgae. The results of this invention are in accordance with previous studies by Rukminasari (2013) which show that density of Dunaliella tertiolecta, Nannochloropsis sp. and Scenedesmus sp.…”

Section: The Abundance Of Skeletonema Sp and Spirulina Sp During Thsupporting

confidence: 92%

THE EFFECT OF TEMPERATURE AND NITRATE COMPOUND ON GROWTH, BIOMASS AND FREE FATTY ACID CONTENT ON MICROALGAE CULTURE OF Spirulina sp. and Skeletonema sp.

Rukminasari

Lukman

Tambaru

et al. 2018

JBAT

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Temperature and availability nutrients played an important role on growth and lipid production of microalgae. In this study, we examined the effect of increasing suhu and excessed and depleted NO3 on growth rate, biomass and free fatty acid concentration in the Spirulina sp and Skeletonema sp. Two microalgae were culture on Conway and Milne media for 21 days using continuous culture technique. There were four temperature treatments, such as 28 o C, 30 o C, 32 o C and 34 o C and three nutrient treatments, which were control nutrient treatment, without NO3 and two times NO3 concentrations from control treatments with three replicates for each treatments. Results found that increasing temperature significantly affected on biomass and concentration free fatty acid, meanwhile nutrient treatments affected on growth rate, biomass and concentration of organic Carbon. In general, increasing temperature was more affected on Spirulina sp in terms of increasing growth rate, biomass and free fatty acid concentration. However, Skeletonema sp was more responsive to availability of NO3 in the media culture for increasing free fatty acid, and percentage of free fatty acid per dry weight.

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“…IR spectra were recorded over a wavelength region 3500-400 cm -1 using Fourier transform infrared spectrometer (Tensor 27, BRUKER). Peak attribution was performed according to available literature (Beardall et al 2012;Meng et al 2014;Rukminasari 2013). 2800-3000 cm -1 characterizes methyl and methylene groups of lipids where *2924-*2854 cm -1 are represented by asymmetric and symmetric CH 2 and *1737-*1740 cm -1 are for the presence of -C=O stretching vibration of ester group suggesting the presence of lipids and fatty acyl chains.…”

Section: Methodsmentioning

confidence: 99%

Influence of varying nitrogen levels on lipid accumulation in Chlorella sp.

Kiran

Pathak

Kumar

et al. 2016

Int. J. Environ. Sci. Technol.

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Microalgal lipids can be enhanced through varying nitrogen (N) content, and limited supply of nitrogen source seems to be valuable approach for increased lipid accumulation in microalgae. In this study, Chlorella sp. IM-02 was observed under fluorescence microscope for increased number of lipid bodies under nitrogen scarcity. Fourier transform infrared spectroscopy was used to determine spectral changes due to varying lipid content under nitrogen-starved (N 0 , without sodium nitrate), nitrogen-limited (N 0.1 , N 0.25 , N 0.5 and N 1.0 representing 0.1, 0.25, 0.5 and 1.0 g/L of sodium nitrate, respectively) and nitrogen-sufficient (N 1.5 , i.e., 1.5 g/L sodium nitrate) setting. Chlorophyll content was also monitored under these conditions as growth indicator. Various biochemical components viz. total carbohydrates, total proteins and total lipids were also estimated under varying nitrogen levels spectrophotometrically. On fourth day itself, maximum lipid productivity was observed in case of N 0.5 , which is having one-third of nitrogen concentration present in original growth media, BG-11. This concludes N 0.5 as suitable nitrogen provision for better production of lipids in Chlorella sp. IM-02 without much compromising the biomass production as both growth and lipid quantity are key parameters affecting the lipid productivity of any microalgal strain.

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Effect of Temperature and Nutrient Limitation on the Growth and Lipid Content of Three Selected Microalgae (<i>Dunaliella tertiolecta</i>, <i>Nannochloropsis</i> sp. and <i>Scenedesmus</i> sp.) for Biodiesel Production

Cited by 11 publications

References 41 publications

Process optimization and modeling for the cultivation of Nannochloropsis sp. and Tetraselmis striata via response surface methodology

Process optimization and modeling for the cultivation of Nannochloropsis sp. and Tetraselmis striata via response surface methodology

THE EFFECT OF TEMPERATURE AND NITRATE COMPOUND ON GROWTH, BIOMASS AND FREE FATTY ACID CONTENT ON MICROALGAE CULTURE OF Spirulina sp. and Skeletonema sp.

Influence of varying nitrogen levels on lipid accumulation in Chlorella sp.

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