Extraction of Acutodesmus obliquus lipids using a mixture of ethanol and hexane as solvent

Escorsim, Alexis Miguel; Rocha, Grazielli da; Vargas, J.V.C.; Mariano, André Bellin; Ramos, Luiz Pereira; Corazza, Marcos L.; Cordeiro, Claudiney Soares

doi:10.1016/j.biombioe.2017.10.035

Cited by 61 publications

(24 citation statements)

References 31 publications

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“…Higher yield achieved by ethanol is due to the fact that it also extracts apolar and polar compounds such as phospholipids and soluble sugars (Baümler et al, ). Ethanol also has lower viscosity than n ‐hexane, which facilitates solvent penetration into the cell wall, favoring the removal of oil (Escorsim et al, ).…”

Section: Resultsmentioning

confidence: 99%

“…To reduce environmental impacts, such as the emission of greenhouse gases, ethanol can be used as an oil extraction solvent, since it is renewable, formed by biotechnological processes, it is a nontoxic solvent with low flammability (Bessa et al, 2017), and because it has similar capacity to n ‐hexane for oil extraction (Baümler, Carŕin, & Carelli, ; Escorsim et al, ; Oliveira & Menezes, ; Rodrigues, Mello, Garcia, & Silva, ).…”

Section: Introductionmentioning

confidence: 99%

“…Due to the cavitation phenomenon, the ultrasonic‐assisted technique allows to extract the components with greater efficiency, reduced process time, use of softer temperatures and smaller amounts of solvent, resulting in products with a minimum degree of degradation (Chemat et al, ; Menezes, Johann, Diório, Pereira, & Silva, ). These effects are possible because the mass transfer mechanism of the solute to the solvent is favored because the cavitation bubbles from the ultrasonic waves interfere in the increase of local pressures and temperatures (Escorsim et al, ; Jalili et al, ) promoting the formation of micropores in the cell wall and subsequent release of the intracellular content (Chemat et al, ; Kim et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Pumpkin (Cucurbita maxima) by‐products: Obtaining seed oil enriched with active compounds from the peel by ultrasonic‐assisted extraction

Massa

Stevanato

Cardozo‐Filho

et al. 2019

J Food Process Engineering

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Ultrasonic-assisted extraction (UAE) of the oil from the seeds/peel mixture of pumpkin using ethanol as solvent was investigated. The effects of the ultrasound, solvent volume, time, and temperature on the oil yield were evaluated. Oil extraction from the seeds by ultrasound and the mixture by Soxhlet extraction (SE) was also performed. The use of ultrasound and higher availability of ethanol (up to 6 mL g −1 sample) favored the oil removal. In the extraction kinetics, the washing step was verified in the first 20 min, corresponding to 79-89% of the total oil yield. The diffusion coefficient increased from 30 to 75 C, as well as the spontaneity of the extraction, achieving 71% of the SE. Linoleic and oleic acids were found in higher concentrations in the oils. UAE made possible the greater extraction of β-carotene, tocopherols, and fistosterois, and the peel addition provided higher contents of these compounds.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pumpkin (Cucurbita maxima) by‐products: Obtaining seed oil enriched with active compounds from the peel by ultrasonic‐assisted extraction

Massa

Stevanato

Cardozo‐Filho

et al. 2019

J Food Process Engineering

View full text Add to dashboard Cite

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“…This strong dependence has had harmful effects both on the environment and society itself, reducing energy security and producing high emissions of greenhouse gases and other pollutants from the combustion process of coal, natural gas, and petroleum derivatives (García et al 2016). The effect on climate change from the use of these fossil fuels and perhaps the decrease in oil reserves has encouraged the demand for energy from renewable sources worldwide (Escorsim et al 2018). Mexico depends on fossil fuels to satisfy its energy needs, where oil represents 62.4%, followed by natural gas with 19.7%, and coal with 4.3% of total demand (SENER 2019).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Mexican waste biomass relative to energy generation

Rutiaga-Quiñones

Pintor-Ibarra

Orihuela-Equihua

et al. 2020

BioRes

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In this work, physical and chemical analyses of 28 sawdust samples (tropical woods, pine woods, and oak woods) derived from the primary process of wood transformation and 4 samples of citrus residues were performed, as an option to make densified biofuels. The study included the determination of initial moisture, particle size distribution, proximate analysis, ultimate analysis, calculation of the calorific value, and ash microanalysis. The initial moisture content of the biomass samples ranged from 6.04 to 75.21%. The biomass granulometry results indicate that the highest proportion corresponds to the 1.0-mm (33.10%) (Fraction retained in mesh 0.5 mm). Other results obtained indicate the following ranges: ash content (0.27 to 6.27%), volatile matter (78.90 to 90.50%), fixed carbon (9.10 to 20.44%), carbon (49.13 to 50.78%), oxygen (42.62 to 44.49%), and hydrogen (5.24 to 6.55%). The calculated calorific value ranged from 17.65 MJ/kg to 20.72 MJ/kg. The chemical elements with the highest concentration in the biomass samples were K and Ca, followed in some cases by Al and P. The biomass with the greatest possibilities for making densified biofuels of better quality is the group of pine woods because they have low mineral content, low nitrogen content, and high calorific value.

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“…14 Acutodesmus obliquus (Scenedesmus obliquus UTEX 393) was chosen for this research due to its biomass potential for biodiesel production as well as its greater potential for use as lipid producer, all these attributes being due to its tolerance to pH variation and easy culturing when nitrogen starvation (stress phase) is involved. 15,16 www.soci.org DX Hurtado et al…”

Section: Introductionmentioning

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

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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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Extraction of Acutodesmus obliquus lipids using a mixture of ethanol and hexane as solvent

Cited by 61 publications

References 31 publications

Pumpkin (Cucurbita maxima) by‐products: Obtaining seed oil enriched with active compounds from the peel by ultrasonic‐assisted extraction

Pumpkin (Cucurbita maxima) by‐products: Obtaining seed oil enriched with active compounds from the peel by ultrasonic‐assisted extraction

Characterization of Mexican waste biomass relative to energy generation

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

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