Increased bio-oil yield from Nannochloropsis salina through tuning the polarity of subcritical water

Eikani, Mohammad H.; Khandan, Nahid; Feyzi, Elnaz

doi:10.1016/j.molliq.2018.12.110

Cited by 6 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in subcritical conditions, the dielectric constant of water decreased from 80 to 33, which is similar to organic solvents like ethanol and methanol [147]. It was shown that bio-oil could be extracted from N. salina using subcritical water [148]. Phenolic compounds, such as caffeic acid, ferulic acid, and p-coumaric acid, were also successfully extracted from Chlorella sp.…”

Section: Co-extraction Of Multiple Compounds From Marine Microalgae Bmentioning

confidence: 93%

Comprehensive Utilization of Marine Microalgae for Enhanced Co-Production of Multiple Compounds

Wang

Chua

et al. 2020

Marine Drugs

View full text Add to dashboard Cite

Marine microalgae are regarded as potential feedstock because of their multiple valuable compounds, including lipids, pigments, carbohydrates, and proteins. Some of these compounds exhibit attractive bioactivities, such as carotenoids, ω-3 polyunsaturated fatty acids, polysaccharides, and peptides. However, the production cost of bioactive compounds is quite high, due to the low contents in marine microalgae. Comprehensive utilization of marine microalgae for multiple compounds production instead of the sole product can be an efficient way to increase the economic feasibility of bioactive compounds production and improve the production efficiency. This paper discusses the metabolic network of marine microalgal compounds, and indicates their interaction in biosynthesis pathways. Furthermore, potential applications of co-production of multiple compounds under various cultivation conditions by shifting metabolic flux are discussed, and cultivation strategies based on environmental and/or nutrient conditions are proposed to improve the co-production. Moreover, biorefinery techniques for the integral use of microalgal biomass are summarized. These techniques include the co-extraction of multiple bioactive compounds from marine microalgae by conventional methods, super/subcritical fluids, and ionic liquids, as well as direct utilization and biochemical or thermochemical conversion of microalgal residues. Overall, this review sheds light on the potential of the comprehensive utilization of marine microalgae for improving bioeconomy in practical industrial application.

show abstract

Section: Co-extraction Of Multiple Compounds From Marine Microalgae Bmentioning

confidence: 93%

Comprehensive Utilization of Marine Microalgae for Enhanced Co-Production of Multiple Compounds

Wang

Chua

et al. 2020

Marine Drugs

View full text Add to dashboard Cite

show abstract

“…As previously mentioned, when water is utilized as the solvent, the extraction is also affected by the dielectric constant (ε) of water. When water is heated at high temperatures while remaining in the liquid state, ε, which is a measure of the polarity of the solvent, is significantly reduced [ 31 , 52 ]. If this value is decreased to values close to the ones of organic solvents (when heated), water can be presented as a useful alternative.…”

Section: Extraction Technologiesmentioning

confidence: 99%

“…The authors ascribed the difference to a thermal degradation that may have had occurred due to the high temperatures utilized in SCWE, and to a possible thermal oxidation, which could have converted those PUFA to lower double bond PUFA, or even to saturated ones. In a distinct study [ 31 ], the same research group reported that utilizing ethanol as a solvent modifier in SCWE yielded an extract with higher lipid and PUFA contents. The authors also found that presence of the cosolvent allowed the extraction process to be performed at lower temperatures (90 °C), which may have decreased the extension of the abovementioned phenomena, or even prevent them from occurring.…”

Section: Extraction Technologiesmentioning

confidence: 99%

See 1 more Smart Citation

Extraction of Nannochloropsis Fatty Acids Using Different Green Technologies: The Current Path

et al. 2023

View full text Add to dashboard Cite

Nannochloropsis is a genus of microalgae widely recognized as potential sources of distinct lipids, particularly polyunsaturated fatty acids (PUFA). These may be obtained through extraction, which has conventionally been performed using hazardous organic solvents. To substitute such solvents with “greener” alternatives, several technologies have been studied to increase their extraction potential. Distinct technologies utilize different principles to achieve such objective; while some aim at disrupting the cell walls of the microalgae, others target the extraction per se. While some methods have been utilized independently, several technologies have also been combined, which has proven to be an effective strategy. The current review focuses on the technologies explored in the last five years to extract or increase extraction yields of fatty acids from Nannochloropsis microalgae. Depending on the extraction efficacy of the different technologies, distinct types of lipids and/or fatty acids are obtained accordingly. Moreover, the extraction efficiency may vary depending on the Nannochloropsis species. Hence, a case-by-case assessment must be conducted in order to ascertain the most suited technology, or tailor a specific one, to be applied to recover a particular fatty acid (or fatty acid class), namely PUFA, including eicosapentaenoic acid.

show abstract

An innovative role of bioactive compounds from microalgae

Sonkamble

Wagh

2022

An Integration of Phycoremediation Processes in Wastewater Treatment

View full text Add to dashboard Cite

Increased bio-oil yield from Nannochloropsis salina through tuning the polarity of subcritical water

Cited by 6 publications

References 18 publications

Comprehensive Utilization of Marine Microalgae for Enhanced Co-Production of Multiple Compounds

Comprehensive Utilization of Marine Microalgae for Enhanced Co-Production of Multiple Compounds

Extraction of Nannochloropsis Fatty Acids Using Different Green Technologies: The Current Path

An innovative role of bioactive compounds from microalgae

Contact Info

Product

Resources

About