Cultivation Of Red Macroalgae In Northeastern Brazil: Optimization Of Processes For The Production Of Organic Compounds With Economic Importance | 107113
Journal of Fundamentals of Renewable Energy and Applications
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The first studies on the economic use of marine macroalgae in Brazil, arose in the decade of 70. Besides the
ecological importance, they are used worldwide as food, fertilizers, biopharmaceuticals and ficocoloides as
biomass for the production of biofuels. Marine macroalgae have rapid growth, high levels of carbohydrates, and
can be grown in wastewater, without the use of land and agricultural inputs. The Laboratory of Carbohydrates
and Lectins (Carbolec) in partnership with the Laboratory of Biotechnology Algae and Processes (BioAP), both
of the Federal University of Ceará, Brazil, conduct research in the area of cultivation, developing and optimizing
new technologies, directing the species cultivated for hydrolysis processes in order to produce ethanol and organic
acids. The macroalgae Gracilaria birdiae, Hypnea musciformis and Solieria filiformis were cultivated in the open
sea at the beach of Flecheiras, municipality of Trairí, Ceará. The cultivation (open sea) was performed using the
"long-line" technique, and in the laboratory the spore culture technique was used. For the hydrolysis, the dry alga
was hydrolyzed in acid solution, the residues were weighed and the hydrolyzed volume was recovered. The sterile
hydrolyzate was fermented by Saccharomyces cerevisiae yeast strains. Aliquots were collected from the fermentation
medium to analyze the fermentation products. The concentrations of these products were determined by High
Efficiency Liquid Chromatograph. Promising results have emerged in the growing area, where daily growth rates
were satisfactory with an average of 5.0%. In the laboratory, the technique of spore culture using the species G.birdiae
proved effective for its applicability to seedling production and repopulation of degraded areas. Tests applying acid
hydrolysis of cultured macroalgae showed that mild hydrolysis conditions are capable of generating significant yields
of fermentable carbohydrates when compared to lignocellulosic materials. Thus, the use of algae for the production
of biofuel through renewable resources reduces environmental impacts.
Results and Conclusions:
1. Sukwong P, Ra C H, Sunwoo I Y, Tantratian S, Jeong G T and Kim S K (2018) Improved fermentation performance
to produce bioethanol from Gelidium amansii using Pichia stipitis adapted to galactose. Bioprocess Biosyst.
2. Castro G M C de, Benevides N M B, Cabral M C, Miranda R D S, Gomes Filho E, Rocha M V P and Araújo M L
H (2017) Optimized acid hydrolysis of the polysaccharides from the seaweed Solieria filiformis (Kützing) P.W.
Gabrielson for bioethanol production. Acta Sci. Biol. Sci. 39(4):423-430
3. Kawai S and Murata K (2016) Biofuel production based on carbohydrates from both brown and red macroalgae:
Recent developments in key biotechnologies. Int. J. Mol. Sci. 17(2):145.
4. Yun E J, Kim H T, Cho K M, Yu S, Kim S, Choi I G and Kim K H (2016) Pretreatment and saccharification of
red macroalgae to produce fermentable sugars. Bioresour. Technol. 199:311-318.
5. Wei N, Quarterman J and Jin Y S (2013) Marine macroalgae: An untapped resource for producing fuels and
chemicals. Trends Biotechnol. 31(2):70-77
Natássia A Ribeiro has her expertise in biological compounds extracted from seaweed and its biological activities. She has completed her Graduation degree in Biological Sciences and her Master’s and Doctoral degree in Biochemistry at Federal University of Ceará, Fortaleza, Brazil. Upon graduation, she has worked with anticoagulant, antithrombotic and pro-inflammation activities. In her Masters and Doctoral degrees, she has worked with the antinociceptive and antiinflammatory activities, always using biomolecules such as polysaccharides of algae. Currently, she is working with the use of algae in food and participates in a project to grow algae in laboratories and its use to generate ethanol and organic acids.
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