Microalgae biorefineries: The Brazilian scenario in perspective

Brasil, Bruno S. A. F.; Silva, F.C.P.; Siqueira, Félix Gonçalves de

doi:10.1016/j.nbt.2016.04.007

Cited by 96 publications

(55 citation statements)

References 98 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The increase in light collection efficiency is a significant innovation in the development of the entire production of biofuels [4]. To obtain competitive biofuels from microalgae, technological challenges have been assumed including strains development, cultivation methods, and improvement of lipid extraction methods and optimization of conversion processes [5]. Currently, production of biofuels from biomass-derived feedstock has been studied via different routes that comprise pretreatment and extraction methods [6].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of two pre-treatments for improving lipid extraction from microalgae Navicula sp.

González-Delgado¹,

Martinez²,

Peralta-Ruiz³

2017

ces

View full text Add to dashboard Cite

The rapid growth of human population and technological advances have led to an urgent need for alternative sources of renewable energy and microalgae have attracted much global attention in recent years. In this work, production of oil and reducing sugars from microalgae Navicula sp. were studied through the design and experimental evaluation of two sequential routes based on pre-treatments (acid hydrolysis and organosolv) and lipid extraction. The effect of these procedures on microalgae cell structure was evaluated through changes in morphology of this biomass. For Organosolv-Soxhlet extraction route, lipid efficiency was 46.96%, 852 Ángel González-Delgado et al. higher than for acid hydrolysis-Soxhlet extraction route (39.98%) that is attributed to a greater degree of cell lysis due to the operating conditions of Organosolv pretreatment. In addition, total reducing sugar (RS) measurement corresponded to 0.45 and 1.47 mg/mL for acid hydrolylisis and organosolv, respectively, which result significatly affected by contact time of biomass with disruptor agents. From characterization of oil extracted, content of saturated fatty acids was 45.1%, this value indicates that Navicula sp. is suitable as feedstock for biofuel production and Organosolv-Soxhlet extraction could be applied as an efficient route for this purpose.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluation of two pre-treatments for improving lipid extraction from microalgae Navicula sp.

González-Delgado¹,

Martinez²,

Peralta-Ruiz³

2017

ces

View full text Add to dashboard Cite

show abstract

“…In the simulated cases, the fermentation gas is demonstrated as a considerable amount, even in relation to the range between 59.2 and 116.2 t CO 2 /h implied by the combustion of bagasse. These CO 2 supplies could potentially provide an interesting feedstock to promote the development of carbon capture technologies or biorefinery concept [3,54,55], if it is the case of organic CO 2 sources being more suitable than the non-anthropogenic CO 2 .…”

Section: Ner Fer and Co 2 Emissions Results For Cases Generated Thromentioning

confidence: 99%

Modelling of a Brazilian ethanol plant: impact of the bagasse use and the ethanol dehydration on energy efficiency and sustainability

Filho

Pradelle

2020

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

Ethanol has a large share in Brazilian primary energy consumption and plays a significant role in the mitigation of the emissions from combustion engines, as national regulations advance towards increasing anhydrous ethanol content in gasoline or by the direct use of hydrated ethanol as fuel. A simulation of a sugarcane ethanol plant with a regular yield of 85.3 L of ethanol per ton of cane was carried out. The investigated process starts from the cultivation of sugarcane to the production of hydrated and/or anhydrous ethanol. The study considered that bagasse can be either burnt for cogeneration or used as feedstock for the enzymatic hydrolysis system. Additionally, alternative energy sources (such as natural gas (NG) burnt in a boiler or electricity from the Brazilian National Interconnected System (NIS)) are considered in order to cover the domestic demand in cases where biomass lacked for energy purposes. Net energy ratio (NER), fossil energy ratio (FER) and total CO 2 emission were modelled through central composite designs to assess scenarios in which the fraction of bagasse sent to hydrolysis (x 1) and hydrated ethanol sent to dehydration (x 2) both varied between 0 and 100%. The application of statistical tools (ANOVA, Student's t test and R 2) showed that x 1 caused significant variations on the investigated parameters, while x 2 proportioned mild effects. NER varied in the range 0.795-0.984, with an optimal value being found at (x 1 , x 2) equal to (81.82, 0) and (36.67, 0) when the system is coupled to NIS and a NG boiler, respectively. FER was verified as high as 11.910 with energy from NIS to produce hydrated ethanol with maximal cogeneration from the bagasse. It diminished to 3, when around 40% of bagasse is sent to enzymatic hydrolysis instead for the cogeneration system and NG complements the domestic demand.

show abstract

“…In Brazil, the work of Brasil and collaborators [ 104 ] evaluated that the microalgal lipid content can range from 1% to 40% of the dry weight and, under certain cultivation conditions, can reach up to 85% of lipids. It is possible to observe that these microalgae are attractive to researchers and industry due to their great capacity for generating polyunsaturated omega-3 and omega-6 long chain acids and, products with high benefit, making them promising raw materials for the production of food supplements.…”

Section: Cyanobacteria and Microalgae At Brazilmentioning

confidence: 99%

Advances in the Biotechnological Potential of Brazilian Marine Microalgae and Cyanobacteria

Oliveira

Costa

et al. 2020

Molecules

View full text Add to dashboard Cite

Due the worldwide need to improve care for the environment and people, there is a great demand for the development of new renewable, sustainable, and less polluting technologies for food, health, and environmental industries. The marine environment is one of the main areas investigated in the search for alternatives to the raw materials currently used. Thereby, cyanobacteria and marine microalgae are microorganisms that are capable of producing a diverse range of metabolites useful for their cellular maintenance, but that also represent a great biotechnological potential. Due its great potential, they have an enormous appeal in the scientific research where, the biological activity of metabolites produced by these microorganisms, such as the antioxidant action of sterols are, some examples of biotechnological applications investigated around the world. Thereby, Brazil due to its extensive biodiversity, has high potential as a raw material supplier of marine waters, researching cyanobacteria and microalgae metabolites and their applications. Thus, this rapid review intends to present some important contributions and advances from Brazilian researchers, using the biomass of Brazilian cyanobacteria and marine microalgae, in order to illustrate the value of what has already been discovered and the enormous potential of what remains unexplored so far.

show abstract

Microalgae biorefineries: The Brazilian scenario in perspective

Cited by 96 publications

References 98 publications

Evaluation of two pre-treatments for improving lipid extraction from microalgae Navicula sp.

Evaluation of two pre-treatments for improving lipid extraction from microalgae Navicula sp.

Modelling of a Brazilian ethanol plant: impact of the bagasse use and the ethanol dehydration on energy efficiency and sustainability

Advances in the Biotechnological Potential of Brazilian Marine Microalgae and Cyanobacteria

Contact Info

Product

Resources

About