The effect of light intensity to the lipids productivity and fatty acid composition of green microalgae

Orazova, S. B.; Karpenyuk, Tatyana A.; Goncharova, Alla V.; Tzurkan, Yana S.; Kairat, B. K.

doi:10.1016/j.jbiotec.2014.07.413

Cited by 4 publications

(3 citation statements)

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“…lower irradiance resulted in higher lipid production related to biomass and higher intensity produced fewer lipids. This pattern coincided with that reported by Orazova et al, 24 who found wileyonlinelibrary.com/jctb…”

Section: Lipid Productionsupporting

confidence: 92%

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Using different wavelengths and irradiance on the microalgae Acutodesmus obliquus batch culture

Hurtado

Garzón‐Castro

Cortés‐Romero

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: The quality of light, such as wavelength and the intensity affect the performance of algal growth and lipid production. Moreover, these variables also affect the lipids profile. To study the interrelation among these variables, Acutodesmus obliquus (Scenedesmus obliquus UTEX393) a microalga, was cultivated using illumination by light-emitting-diode surface mount device extensions emitting red ( = 620-750 nm), yellow ( = 570-590 nm), green ( = 495-570 nm) and violet ( = 380-450 nm) light. Additionally, each culture was illuminated at different light intensities (I 1 = 8.75, I 2 = 14.22 and I 3 = 19.69 W m −2 ). Finally, all samples were analysed by GC-MS. RESULTS:The results showed: (1) the biomass production is directly proportional to the light intensity, e.g. at I 3 = 19.69 W m −2 violet (36.80 mg L −1 ), yellow (25.49 mg L −1 ) and red (39.44 mg L −1 ) showed the major production; (2) however, the lipids were produced in minor amounts at major violet light intensity (3.64 mg L −1 at I 3 = 19.69 W m −2 ); (3) the major lipids production (20.56 mg L −1 ) was obtained with red light at I 3 = 19.69 W m −2 and (4) A. obliquus, under the parameters established was a good producer of lipids. CONCLUSIONS:The major amount of biomass was obtained at red, yellow and violet light; meanwhile, the low biomass production, using green light, was associated with inefficient absorption of green light by chlorophyll. Additionally, palmitic, linolenic and linoleic were the most produced lipids, establishing a dependence between light wavelength and irradiance with biomass and lipid production. These results support the use of wavelengths and intensities to produce a group of specific lipids according to the needs of different industries.

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Section: Lipid Productionsupporting

confidence: 92%

“…21 Some microalgae-related studies have suggested that irradiance levels can alter cell response which affects biomass, pigment, unsaturated fatty acid and nitrogen production and phosphorus removal. 14,[22][23][24][25][26] This led to the cultures being illuminated with SMD LED extensions at chosen wavelengths:…”

Section: Experimental Conditionsmentioning

confidence: 99%

Using different wavelengths and irradiance on the microalgae Acutodesmus obliquus batch culture

Hurtado

Garzón‐Castro

Cortés‐Romero

et al. 2019

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…However, Peng et al (2014) achieved a satisfying BET area precisely with ammonium iron (III) sulfate dodecahydrate. It is known that the chemical composition of microalgae can sensibly change from species to species but also due to different environmental conditions (Orazova et al 2014;Batista et al 2013;Ötleş and Pire 2001), so it is possible to assume that the different results could have depended on the different chemical composition of the microalgae and the interaction between the chemical components of the biomass and the two iron salts during the complex chain-like reactions of HTC.…”

Section: Me-nfe Characteristicsmentioning

confidence: 99%

Production of microalgal-based carbon encapsulated iron nanoparticles (ME-nFe) to remove heavy metals in wastewater

Mantovani

Collina

Lasagni

et al. 2022

Preprint

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The integration of microalgae-bacteria consortia within existing wastewater treatment plants as alternative biological treatment could be an interesting option to improve the sustainability of these facilities. However, the fate of the produced biomass is decisive to make that option economically attractive. The present study aimed to valorize the microalgae grown at a pilot scale and used for the treatment of the centrate from municipal sewage sludge, producing microalgal-based iron nanoparticles (ME-nFe), by hydrothermal carbonization. The final product had high carbon content, strong sorbent power, and reducing properties, due to the presence of zerovalent iron. Different synthesis conditions were tested, comparing iron (III) nitrate nonahydrate (Fe (NO 3 ) 3 ·9H 2 O) and ammonium iron (III) sulfate dodecahydrate (NH 4 Fe (SO 4 ) 2 ·12 H 2 O) as iron sources, four different Fe/C molar ratios (0.02, 0.05, 0.1, 0.2) and three process temperatures (180, 200, 225 °C). Based on the characterization of all the prototypes, the best one (having a specific area of 110 m 2 g -1 ) was chosen and tested for the removal of selected heavy metals by Jar tests. The removal of copper, zinc, cadmium, and nickel from the treated effluent from the wastewater treatment plant was 99.6%, 97.8%, 96.4%, 80.3%, respectively, also for very low starting concentrations (1 mg L -1 ). The removal of total chromium, on the contrary, was only 12.4%. Thanks to the magnetic properties the same batch of ME-nFE was recovered and used effectively for three consecutive Jar tests.

show abstract

Production of microalgal-based carbon encapsulated iron nanoparticles (ME-nFe) to remove heavy metals in wastewater

Mantovani

Collina

Lasagni

et al. 2022

Environ Sci Pollut Res

View full text Add to dashboard Cite

The integration of microalgae-bacteria consortia within existing wastewater treatment plants as alternative biological treatment could be an interesting option to improve the sustainability of these facilities. However, the fate of the produced biomass is decisive to make that option economically attractive. The present study aimed to valorize the microalgae grown at a pilot scale and used for the treatment of the centrate from municipal sewage sludge, producing microalgal-based iron nanoparticles (ME-nFe), by hydrothermal carbonization. The final product had high carbon content, strong sorbent power, and reducing properties, due to the presence of zerovalent iron. Different synthesis conditions were tested, comparing iron (III) nitrate nonahydrate (Fe (NO3)3·9H2O) and ammonium iron (III) sulfate dodecahydrate (NH4 Fe (SO4)2·12 H2O) as iron sources, four different Fe/C molar ratios (0.02, 0.05, 0.1, 0.2), and three process temperatures (180, 200, 225 °C). Based on the characterization of all the prototypes, the best one (having a specific area of 110 m2g−1) was chosen and tested for the removal of selected heavy metals by Jar tests. The removal of copper, zinc, cadmium, and nickel from the treated effluent from the wastewater treatment plant was 99.6%, 97.8%, 96.4%, and 80.3%, respectively, also for very low starting concentrations (1 mg L−1). The removal of total chromium, on the contrary, was only 12.4%. Thanks to the magnetic properties, the same batch of ME-nFe was recovered and used effectively for three consecutive Jar tests.

show abstract

The effect of light intensity to the lipids productivity and fatty acid composition of green microalgae

Cited by 4 publications

References 0 publications

Using different wavelengths and irradiance on the microalgae Acutodesmus obliquus batch culture

Using different wavelengths and irradiance on the microalgae Acutodesmus obliquus batch culture

Production of microalgal-based carbon encapsulated iron nanoparticles (ME-nFe) to remove heavy metals in wastewater

Production of microalgal-based carbon encapsulated iron nanoparticles (ME-nFe) to remove heavy metals in wastewater

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