Potential of Chlorella fusca LEB 111 cultivated with thermoelectric fly ashes, carbon dioxide and reduced supply of nitrogen to produce macromolecules

Braga, Vagner da Silva; Moreira, Juliana Botelho; Costa, Jorge Alberto Vieira; Morais, Michele Greque de

doi:10.1016/j.biortech.2019.01.035

Cited by 19 publications

(5 citation statements)

References 32 publications

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“…45 Lipids can be used also in the production of biodiesel and as sources of high-value-added compounds, such as polyunsaturated fatty acids that can be used in human food. 46 Carbohydrates can be used both as a raw material for bioethanol production 47 and as sources of high-value-added compounds. 48 In conclusion, endogenous IAA and tZ were identified in the biomass of C. fusca LEB 111, C. vulgaris LEB 112, S. obliquus LEB 117, S. nidulans LEB 115 and Spirulina sp.…”

Section: Discussionmentioning

confidence: 99%

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Identification of the phytohormones indole‐3‐acetic acid and trans‐zeatin in microalgae

Cruz

Rosa

Costa

2023

J of Chemical Tech & Biotech

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BACKGROUND: Microalgae can biosynthesize phytohormones that promote plant growth and development. These compounds can potentially replace synthetic agricultural inputs that are harmful to the environment. The main plant growth-promoting phytohormones present in microalgae are auxins and cytokinins. The objective of this study was to evaluate the influence of culture conditions (autotrophic and heterotrophic) on the concentrations of the endogenous phytohormones indole-3-acetic acid (IAA) and trans-zeatin (tZ) in the microalgae Chlorella fusca LEB 111, Chlorella vulgaris LEB 112, Scenedesmus obliquus LEB 117, Synechococcus nidulans LEB 115 and Spirulina sp. LEB 18.RESULTS: All microalgae produced IAA and tZ under the three evaluated conditions (autotrophic light/dark (12/12 h), autotrophic continuous light (24 h) and heterotrophic). The IAA concentrations ranged from 1.94 to 56.45 nmol g −1 , whereas those of tZ ranged from 0.06 to 35.52 pmol g −1 . The cultivation conditions increased the carbohydrate and protein concentrations. Continuous light favored the production of carbohydrates in the studied cyanobacteria (Synechococcus nidulans LEB 115 and Spirulina sp. LEB 18). However, the light/dark condition (12/12 h) afforded the highest protein concentrations for green algae and cyanobacteria. There were no statistically significant differences in the lipid content of the strains studied. CONCLUSIONS:The results of this study are valuable and indicate that the cultivation conditions and species used in this study may be applied in sustainable agriculture, providing alternatives that may contribute to minimizing the environmental impact of synthetic chemical inputs in agriculture.

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Section: Discussionmentioning

confidence: 99%

“…Lipids can be used also in the production of biodiesel and as sources of high‐value‐added compounds, such as polyunsaturated fatty acids that can be used in human food 46 . Carbohydrates can be used both as a raw material for bioethanol production 47 and as sources of high‐value‐added compounds 48 …”

Section: Discussionmentioning

confidence: 99%

Identification of the phytohormones indole‐3‐acetic acid and trans‐zeatin in microalgae

Cruz

Rosa

Costa

2023

J of Chemical Tech & Biotech

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“…When grown on spills or wastewater, microalgae can grow at a faster rate and utilise more nutrients than when grown in freshwater, making them ideal for biofuel production and other added‐value products. Studies also reveal their efficiency to thrive in solid wastes like molasses, animal waste and ash released by thermal power plants (Braga et al, 2019).…”

Section: Competence Of Microalgae‐based Wastewater Managementmentioning

confidence: 99%

Current and future perspectives of a microalgae based circular bioeconomy to manage industrial wastewater– A Systematic Review

Raghuraman Rengarajan,

Detchanamurthy,

Panneerselvan

et al. 2024

Physiologia Plantarum

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Post technological advancements and industrialisation, the recovery of resources by treating wastewater is gaining momentum. As the global population continues to grow, the need for water is becoming increasingly urgent. Therefore, the re‐utilisation of water is becoming an increasingly important factor in the preservation of life on this planet. Wastewater is classified according to its source of origin. When left untreated, the effluent causes several environmental hazards and poses health issues as they have higher concentrations of nutrients and toxic heavy metals. Currently, several conventional methods exist to treat and handle wastewater, but they generate secondary waste post‐treatment and are not sustainable. Microalgae‐based treatment of wastewater is highly sustainable, cost‐efficient and aligns with the concept of circular bioeconomy. The biological treatment of effluents using microalgae has several advantages. Approximately 1.83 kg of CO2 is sequestered per kg of the dry biomass during microalgae cultivation. Among all the sustainable alternatives, microalgae offer better biomass productivity by utilising a higher concentration of nutrients in wastewater. The wastewater‐grown microalgae have higher efficiency in producing commercially important secondary metabolites. This systematic review highlights the competence of microalgae in different wastewater sources and their industrial perspectives. This also gives an overview of the biproducts produced from microalgae‐based wastewater treatment.

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“…Another point of interest is that microalgae are able to directly use carbon dioxide (CO2) to produce biomass, which consequently minimizes the environmental problems caused by CO2, the main greenhouse gas. Still, in a sustainable way, microalgae can be cultivated in wastewater, where they would serve as treatment in the removal of heavy metals and nutrients and generate biomass, a product of interest for the production of biopolymers (da Silva Braga et al, 2019).…”

Section: Microalgaementioning

confidence: 99%

Comparative Study of Properties of Biopolymers from Corn Starch with Addition of Microalgae Spirulina platensis

Abreu¹,

Pereira²,

Silva³

2023

American Journal of Engineering and Applied Sciences

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The discovery of the environmental impacts caused by petroleumbased polymers has led to the use of natural polymers gaining more and more space. Naturally occurring polymers, also known as biopolymers, are chemical compounds produced by living things or raw materials from renewable energy sources. Their main advantage is decomposition, while polymers from fossil and non-renewable energies can take hundreds of years to decompose, biopolymers have significantly shorter life cycles. In this study, a study of the application of the biomass of the microalgae Spirulina platensis in biodegradable films with corn starch was conducted, aiming for the development of a functional film with rapid degradability. Approximately 48 biofilms were produced in varying concentrations (w/v), where the visual characteristics of each were observed and the ones that presented the greatest resemblance to conventional plastics were selected, being Trial 4 (T4) and Trial 46 (T46), composed of 2 and 70% v/v of microalgae, respectively. The other tries were discarded due to cracking, high fragility, and very gelatinous or very rigid appearance. The morphological characteristics of T4 and T46 biofilms were analyzed by Scanning Electron Microscopy (SEM) and compared to those of a conventional plastic bag and a commercially available biodegradable plastic bag, where it was possible to prove that the biofilms produced presented good morphological structure. The Fourier Transform Infrared Spectroscopy (FTIR) analysis provided structural information, proving the presence of polyhydroxyalkanoate in the biofilms produced. Two degradability tests were performed with satisfactory results obtained, proving the rapid degradation of the biopolymers produced. It was possible to prove that the biofilms under study present great potential for replacing conventional polymers.

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Potential of Chlorella fusca LEB 111 cultivated with thermoelectric fly ashes, carbon dioxide and reduced supply of nitrogen to produce macromolecules

Cited by 19 publications

References 32 publications

Identification of the phytohormones indole‐3‐acetic acid and trans‐zeatin in microalgae

Identification of the phytohormones indole‐3‐acetic acid and trans‐zeatin in microalgae

Current and future perspectives of a microalgae based circular bioeconomy to manage industrial wastewater– A Systematic Review

Comparative Study of Properties of Biopolymers from Corn Starch with Addition of Microalgae Spirulina platensis

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