LED power efficiency of biomass, fatty acid, and carotenoid production in Nannochloropsis microalgae

Ma, Ruijuan; Thomas‐Hall, Skye R.; Chua, Elvis T.; Eltanahy, Eladl; Netzel, M.; Netzel, Gabriele; Lu, Yinghua; Schenk, Peer M.

doi:10.1016/j.biortech.2017.12.096

Cited by 70 publications

(28 citation statements)

References 36 publications

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“…Fatty acids were identified using a Supelco® 37‐component FAME mix standard purchased from Sigma‐Aldrich and verified using the NIST14 library. Heptadecanoic acid was used as the internal standard, while heneicosanoic acid was used as the recovery standard for the analysis . Total fatty acid (TFA) content was determined as the sum of all of the fatty acids.…”

Section: Methodsmentioning

confidence: 99%

“…Heptadecanoic acid was used as the internal standard, while heneicosanoic acid was used as the recovery standard for the analysis. 37 Total fatty acid (TFA) content was determined as the sum of all of the fatty acids. Agilent HPLC Alltech carbohydrate column was used to speciate glucose, fructose, xylose, maltose, sucrose, and maltotriose.…”

Section: Fatty Acid Methyl Ester Profilingmentioning

confidence: 99%

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Mixotrophic cultivation of Scenedesmus dimorphus in sugarcane bagasse hydrolysate

Manzoor

Ahmad

Aslam

et al. 2019

Env Prog and Sustain Energy

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Overuse of the fossil fuels to fulfill existing energy requirements has generated various environmental problems like global warming. Emergence of environmental issues due to burning of the fossil fuel resources has provoked researchers to explore alternative sources of fuel. In this scenario, microalgal biofuels could present a promising alternative fuel if produced cost‐effectively without competing for freshwater resources and arable land. Aim of the present study was to grow microalgae by employing lignocellulosic waste for production of lipids. Scenedesmus dimorphus NT8c was chosen based on its ability to tolerate heat, rapid growth, and ease of harvesting by overnight settling. Biochemical composition and growth parameters of microalgae were analyzed when cultivated mixotrophically on sugarcane bagasse hydrolysate, a low‐value agricultural by‐product, that is, currently underutilized. Despite a slight increase in turbidity in the medium, S. dimorphus NT8c cultures raised mixotrophically in 5 g/L sugarcane bagasse hydrolysate displayed significantly higher growth rates compared to photoautotrophic cultivation with an overall biomass productivity of 119.5 mg L d−1, protein contents of 34.82% and fatty acid contents of 15.41%. Thus, microalgae cultivated mixotrophically are capable of photosynthesizing while metabolizing and assimilating organic carbon, significant increases of biomass and lipid productivity can be achieved. However, high supplementation with organic carbon can result in unfavorable levels of turbidity and bacterial growth, reducing microalgal biomass productivity.

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Section: Methodsmentioning

confidence: 99%

Section: Fatty Acid Methyl Ester Profilingmentioning

confidence: 99%

Mixotrophic cultivation of Scenedesmus dimorphus in sugarcane bagasse hydrolysate

Manzoor

Ahmad

Aslam

et al. 2019

Env Prog and Sustain Energy

Self Cite

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“…We determined the conversion capability of LED power-to-biomass, power-to-lipid, power-to-protein, and power-to-carbohydrate for these microalgae biofilms cultured under different LEDs, which were calculated by [30]:…”

Section: Led Power Conversion Capabilitymentioning

confidence: 99%

“…Recently, using LEDs in microalgae culture has been considered as a promising choice due to its advantages of small size, low power consumption, narrow wavelength band and reduced heat release [26][27][28][29]. Some researchers have studied the LED power conversion efficiency of microalgae cultured in suspended systems [30,31]. For example, Ma et al studied LED power-to-biomass efficiency for Nannochloropsis cultured in suspended systems, and reported that using LED as light source in suspended microalgae culture was more energy efficient [30].…”

Section: Introductionmentioning

confidence: 99%

“…Some researchers have studied the LED power conversion efficiency of microalgae cultured in suspended systems [30,31]. For example, Ma et al studied LED power-to-biomass efficiency for Nannochloropsis cultured in suspended systems, and reported that using LED as light source in suspended microalgae culture was more energy efficient [30]. Ajayan et al found that LEDs provided more light penetration in a column photobioreactor compared with the fluorescent lights, and improved the cell concentration, specific growth rate, total pigments and lipid contents of C. reinhardtii [31].…”

Section: Introductionmentioning

confidence: 99%

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Light-Emitting Diode Power Conversion Capability and CO2 Fixation Rate of Microalgae Biofilm Cultured Under Different Light Spectra

Yuan

Wang

et al. 2020

Energies

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Microalgae biofilm-based culture has attracted much interest due to its high harvest efficiency and low energy requirements. Using light-emitting diodes (LEDs) as light source for microalgae culture has been considered as a promising choice to enhance the economic feasibility of microalgae-based commodities. In this work, the LED power conversion capability and CO2 fixation rate of microalgae biofilms (Chlorella ellipsoidea and Chlorella pyrenoidosa) cultured under different light spectra (white, blue, green and red) were studied. The results indicated that the power-to-biomass conversion capabilities of these two microalgae biofilms cultured under blue and white LEDs were much higher than those under green and red LEDs (C. ellipsoidea: 32%–33% higher, C. pyrenoidosa: 34%–46% higher), and their power-to-lipid conversion capabilities cultured under blue LEDs were 61%–66% higher than those under green LEDs. The CO2 fixation rates of these two biofilms cultured under blue LEDs were 13% and 31% higher, respectively, than those under green LEDs. The results of this study have important implications for selecting the optimal energy-efficient LEDs using in microalgae biofilm-based culture systems.

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Effects of incident light intensity and light path length on cell growth and oil accumulation in Botryococcus braunii (Chlorophyta)

Wang

Chen

et al. 2018

Engineering in Life Sciences

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Botryococcus braunii was cultured in different light path length under different incident light intensity to investigate the effect of light on alga growth as well as hydrocarbon and fatty acid accumulation. Results indicated that longer light path length required higher incident light intensity in order to meet the light requirement of algal growth and hydrocarbon accumulation during the course of cultivation. However, hydrocarbon profile was only affected by the incident light intensity and not influenced by the light path length. High incident light intensity enhanced the accumulation of hydrocarbons with longer carbon chains. Besides, the fatty acid content and profiles were significantly influenced by both incident light intensity and light path. Higher fatty acid content and higher percentage of C18 and monounsaturated fatty acid components were achieved at the higher incident light intensity and lower light path length. Taken together, these results are benefit to improve its biomass and oil productivity through the optimization of light and photobioreactor design.

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LED power efficiency of biomass, fatty acid, and carotenoid production in Nannochloropsis microalgae

Cited by 70 publications

References 36 publications

Mixotrophic cultivation of Scenedesmus dimorphus in sugarcane bagasse hydrolysate

Mixotrophic cultivation of Scenedesmus dimorphus in sugarcane bagasse hydrolysate

Light-Emitting Diode Power Conversion Capability and CO2 Fixation Rate of Microalgae Biofilm Cultured Under Different Light Spectra

Effects of incident light intensity and light path length on cell growth and oil accumulation in Botryococcus braunii (Chlorophyta)

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