Fatty acid profile and energy efficiency of biodiesel production from an alkaliphilic algae grown in the photobioreactor

The aim of this study was to evaluate the fatty acid profile in soybean cultivars from northeastern Brazil, materials developed primarily to achieve a minimum level of oil and protein. The purpose is to serve as to warn about the need to modify fatty acids profiles to enhance both the oil for human consumption and that used in biodiesel production. Results showed the predominance of linoleic acid (average 50.1%) followed by oleic acid (27.9%), palmitic acid (11.97%), linolenic acid (6.68%) and stearic acid (3.38%) in the composition of fatty acids. Such condition makes soybean oil less competitive for both human consumption (for its high content of saturated fatty acids) and the biodiesel industry (problems with oxidative stability and flow in the cold). Considerations are also made on conventional and modern techniques to overcome these drawbacks.

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Investigation of Growth, Lipid Productivity, and Fatty Acid Profiles in Marine Bloom-Forming Dinoflagellates as Potential Feedstock for Biodiesel

Journal of Marine Science and Engineering ◽

10.3390/jmse8060381 ◽

2020 ◽

Vol 8 (6) ◽

pp. 381

Author(s):

Steven Jingliang Xu ◽

Kam-Chau Wu ◽

Sophie Cheuk-Yan Chan ◽

Yiu-Hung Yau ◽

Kin-Ka Chan ◽

...

Keyword(s):

Growth Rate ◽

Fatty Acid ◽

Fatty Acid Profile ◽

Green Alga ◽

Algal Bloom ◽

Harmful Algal Bloom ◽

Total Lipid Content ◽

Lipid Productivity ◽

Biodiesel Production ◽

Significant Difference

Microalgae-based biodiesel is increasingly recognized as an alternative to crop-based biodiesel. In this study, 10 local strains of dinoflagellates collected from Hong Kong waters, including a monoculture and field sample of Scrippsiella sp. isolated from an algal bloom, were evaluated against the performance of green alga Tetraselmis suecica. The specific growth rate, biomass production, lipid productivity, and fatty acid profile were investigated. The total lipid content of isolated strains ranged from 16.2% to 32.2% of the total dry biomass, whereas palmitic acid (C16:0) and docosahexaenoic acid (DHA, C22:6n3) were dominant in the fatty acid profile. Scrippsiella sp. has a high lipid productivity (47.3 mg/L/day) and fatty acid methyl esters (FAME) content (55.2–73 mg/g dry weight (dw)), which were comparable to that in green alga T. suecica. Further, monoculture and field sampled blooming Scrippsiella sp. showed no significant difference in most parameters, suggesting the possibility of harvesting a natural algal bloom population as a mitigation strategy to harmful algal bloom and to use as biodiesel feedstock. Overall, dinoflagellate species showed a slower growth rate (0.04–0.57 day−1) than most compared species (0.07–1.34 day−1), likely due to a large genome size and low chlorophyll to carbon ratio. Notably, most investigated dinoflagellates were not ideal for mass biodiesel production due to the low growth rate and lipid productivity. However, a high level of polyunsaturated fatty acids (PUFA) in dinoflagellates are prospective for further studies in other biotechnological applications. Though effectively harvesting algal blooming biomass can be complex, it can be further explored as a strategy for algal bloom mitigation and potentially creating values at the advantage of natural bloom when applying harvested biomass for biodiesel and bioactive compounds extraction.

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Carbon-to-nitrogen ratio affects the biomass composition and the fatty acid profile of heterotrophically grown Chlorella sp. TISTR 8990 for biodiesel production

Journal of Biotechnology ◽

10.1016/j.jbiotec.2015.10.003 ◽

2015 ◽

Vol 216 ◽

pp. 169-177 ◽

Cited By ~ 39

Author(s):

Somruethai Singhasuwan ◽

Wanna Choorit ◽

Sarote Sirisansaneeyakul ◽

Nakhon Kokkaew ◽

Yusuf Chisti

Keyword(s):

Fatty Acid ◽

Fatty Acid Profile ◽

Biodiesel Production ◽

Biomass Composition ◽

Carbon To Nitrogen Ratio ◽

Chlorella Sp ◽

Nitrogen Ratio

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Impact of genotype on fatty acid profile, oil content and nutritional value of the sweet fruits of Acrocomia aculeata

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452020796 ◽

2020 ◽

Vol 42 (6) ◽

Author(s):

Rosemar Antoniassi ◽

Sidinea Cordeiro de Freitas ◽

Tania dos Santos Silva ◽

Manuela Cristina Pessanha de Araujo Santiago ◽

Allan Eduardo Wilhelm ◽

...

Keyword(s):

Fatty Acid ◽

Fatty Acid Profile ◽

Nutritional Value ◽

Oil Content ◽

Biodiesel Production ◽

Fruit Characteristics ◽

Total Dietary Fiber ◽

Glucose Content ◽

Significant Difference ◽

Acrocomia Aculeata

Abstract Macauba (Acrocomia aculeata) has mainly been evaluated as an oil source focused on biodiesel production. Furthermore, the fruit mesocarp and kernel are edible, and candies, jelly, sweet alcoholic liquor and ice cream are also produced from the mesocarp. Despite its consumption, there is still a lack of information on the nutritional composition of macauba. Selected macauba genotypes producing fruits with a sweet mesocarp were evaluated regarding the fruit characteristics, proximate composition, oil content and fatty acid profile. The mesocarp total sugar (fructose and glucose) content ranged from 4.5 to 9.6 g/100 g, total dietary fiber varied from 6.8 to 9.3 g/100 g, while protein content was up to 2.2 g/100 g (wet basis). There was a significant difference among genotypes for fruit characteristics, pulp oil content (7-29 g/100 g wet basis), and fatty acids from the mesocarp such as C18:1 (36-63%), C18:2 (7-35%) and C18:3 (0.8-7%)(p<0.05), and one of the evaluated genotypes may contribute to daily intake of linoleic and linolenic acids. The carotenes in the mesocarp oil ranged from 30-240 mg/kg. Lauric acid was the main fatty acid in the kernel oil. The differences observed depended on the genetic diversity and point out the nutritional value and different applications for macauba mesocarps.

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