Obtaining biodiesel from microalgae oil using ultrasound-assisted in-situ alkaline transesterification

Martínez, Natalia; Callejas, Nicolás; Morais, Etiele Greque de; Costa, Jorge Alberto Vieira; Jachmanián, Iván; Vieitez, Ignácio

doi:10.1016/j.fuel.2017.04.040

Cited by 49 publications

(19 citation statements)

References 29 publications

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“…Alkali (NaOH) treatment increased the yield to 911 mg/L. 2017 [281] Ultrasound used for biodiesel production using microalgae oil Without ultrasound, in 2 h, the yield was 63.9%; whereas using ultrasound, the yield increased to 97.6%. 2018 [282] Ultrasound-assisted synthesis of triacetin via acetylation of glycerol A selectivity of 100% was achieved.…”

Section: Hydrogen Usage Incorporating Ultrasound Technologymentioning

confidence: 99%

A review on recent advances in hydrogen energy, fuel cell, biofuel and fuel refining via ultrasound process intensification

Zore

Yedire

Pandi

et al. 2021

Ultrasonics Sonochemistry

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Highlights A detailed review of ultrasound enabled mechanism and its disparate applications have been presented. Emphasis is made on the sonochemical routes for hydrogen production and their advantages. Recent research studies on the synthesis of materials for hydrogen storage have been reported. Sonochemistry relevance in the fuel cell, biofuel technology and fuel refining have been discussed.

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Section: Hydrogen Usage Incorporating Ultrasound Technologymentioning

confidence: 99%

A review on recent advances in hydrogen energy, fuel cell, biofuel and fuel refining via ultrasound process intensification

Zore

Yedire

Pandi

et al. 2021

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

show abstract

“…101 Martinez et al reported the use of ultrasonication to improve in situ alkaline transesterification, demonstrating that ester content in the extract could be improved from 63.6% to 97.6%. 104 Subjecting a 5% microalgal suspension in aqueous media to 1000 W of power for 30 min yielded a maximum oil recovery of 0.21% (4.2% of the microalgal biomass on a dry-mass basis). Wang and Yuan investigated the use of nozzle spraying with ultrasonication, and noted that low concentration microalgal suspensions (0.05-0.4%) were well disrupted using this technique.…”

Section: Simultaneous Extraction and Transesterificationmentioning

confidence: 99%

“…Martinez et al . reported the use of ultrasonication to improve in situ alkaline transesterification, demonstrating that ester content in the extract could be improved from 63.6% to 97.6% . Subjecting a 5% microalgal suspension in aqueous media to 1000 W of power for 30 min yielded a maximum oil recovery of 0.21% (4.2% of the microalgal biomass on a dry‐mass basis).…”

Section: Simultaneous Cell Disruption and Extractionmentioning

confidence: 99%

Advances in microalgal lipid extraction for biofuel production: a review

Harris

Viner

Champagne

et al. 2018

Biofuels Bioprod Bioref

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Algal biomass is an attractive feedstock for sustainable biofuel production because of its high growth rate and the fact that it does not compete with food crops. This review examines progress made in the processing and extraction of microalgal lipids as feedstocks for algae‐derived biofuels. The discussion focuses on lipid extraction processes but also mentions drying, cell disruption, and transesterification processes because of their potential effect on the extraction process, and because of the possibility of performing them simultaneously with extraction. Some of the common themes discussed include the benefits of utilizing wet microalgal biomass, combining process steps (process intensification), and the importance of considering the entire life cycle when assessing the ‘greenness’ of a technology. Lipid extraction technologies will need to be improved for microalgal biofuels to compete effectively with fossil fuels, particularly through the development of energy‐efficient extraction methods and the adaptation of these methods for large‐scale production. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd

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“…Mechanical pretreatments are commonly employed to disrupt different kind of organic substrates in industrial processes [ 44 , 45 ]. Ultrasound treatment has been applied to disrupt microalgae cell wall in different bioprocess devoted to biofuel production, such as ethanol production from Chlorella biomass [ 46 ] and biodiesel generation from Spirulina biomass [ 47 ]. In the case of anaerobic digestion, ultrasound pretreatment has also shown positive results in terms of methane yield enhancement.…”

Section: Pretreatment Of Microalgae Biomass To Improve Biogas Prodmentioning

confidence: 99%

Efficient Anaerobic Digestion of Microalgae Biomass: Proteins as a Key Macromolecule

2018

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Biogas generation is the least complex technology to transform microalgae biomass into bioenergy. Since hydrolysis has been pointed out as the rate limiting stage of anaerobic digestion, the main challenge for an efficient biogas production is the optimization of cell wall disruption/hydrolysis. Among all tested pretreatments, enzymatic treatments were demonstrated not only very effective in disruption/hydrolysis but they also revealed the impact of microalgae macromolecular composition in the anaerobic process. Although carbohydrates have been traditionally recognized as the polymers responsible for the low microalgae digestibility, protease addition resulted in the highest organic matter solubilization and the highest methane production. However, protein solubilization during the pretreatment can result in anaerobic digestion inhibition due to the release of large amounts of ammonium nitrogen. The possible solutions to overcome these negative effects include the reduction of protein biomass levels by culturing the microalgae in low nitrogen media and the use of ammonia tolerant anaerobic inocula. Overall, this review is intended to evidence the relevance of microalgae proteins in different stages of anaerobic digestion, namely hydrolysis and methanogenesis.

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Obtaining biodiesel from microalgae oil using ultrasound-assisted in-situ alkaline transesterification

Cited by 49 publications

References 29 publications

A review on recent advances in hydrogen energy, fuel cell, biofuel and fuel refining via ultrasound process intensification

A review on recent advances in hydrogen energy, fuel cell, biofuel and fuel refining via ultrasound process intensification

Advances in microalgal lipid extraction for biofuel production: a review

Efficient Anaerobic Digestion of Microalgae Biomass: Proteins as a Key Macromolecule

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