Effect of High Pressure Homogenization on Aqueous Phase Solvent Extraction of Lipids from Nannochloris Oculata Microalgae

Samarasinghe, Nalin; Fernando, Sandun; Faulkner, Brock

doi:10.11648/j.jenr.20120101.11

Cited by 26 publications

(12 citation statements)

References 13 publications

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“…Numerous studies have been carried out on techniques to obtain microalgal extracts (Samarasinghe et al, 2012; Michalak and Chojnacka, 2014, 2015 and refrences cited therein). The extraction techniques require as a first step the removal of the cell wall for releasing the bioactive compounds (Samarasinghe et al, 2012).…”

Section: Extraction Techniques Chemical Characterization and Applicamentioning

confidence: 99%

Renewable Sources of Plant Biostimulation: Microalgae as a Sustainable Means to Improve Crop Performance

et al. 2018

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Plant biostimulants (PBs) attract interest in modern agriculture as a tool to enhance crop performance, resilience to environmental stress, and nutrient use efficiency. PBs encompass diverse organic and inorganic substances (humic acids and protein hydrolysates) as well as prokaryotes (e.g., plant growth promoting bacteria) and eukaryotes such as mycorrhiza and macroalgae (seaweed). Microalgae, which comprise eukaryotic and prokaryotic cyanobacteria (blue-green algae), are attracting growing interest from scientists, extension specialists, private industry and plant growers because of their versatile nature: simple unicellular structure, high photosynthetic efficiency, ability for heterotrophic growth, adaptability to domestic and industrial wastewater, amenability to metabolic engineering, and possibility to yield valuable co-products. On the other hand, large-scale biomass production and harvesting still represent a bottleneck for some applications. Although it is long known that microalgae produce several complex macromolecules that are active on higher plants, their targeted applications in crop science is still in its infancy. This paper presents an overview of the main extraction methods from microalgae, their bioactive compounds, and application methods in agriculture. Mechanisms of biostimulation that influence plant performance, physiology, resilience to abiotic stress as well as the plant microbiome are also outlined. Considering current state-of-the-art, perspectives for future research on microalgae-based biostimulants are discussed, ranging from the development of crop-tailored, highly effective products to their application for increasing sustainability in agriculture.

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Section: Extraction Techniques Chemical Characterization and Applicamentioning

confidence: 99%

Renewable Sources of Plant Biostimulation: Microalgae as a Sustainable Means to Improve Crop Performance

et al. 2018

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“…[29] This result was confirmed by similar results from other studies. [30,31] Determination of the sugar content of the lipidextraction by-products…”

Section: Comparison Of the Fatty Acid Compositionmentioning

confidence: 99%

Effective production of bioenergy from marineChlorellasp. by high-pressure homogenization

Choi

Lee

2015

Biotechnology & Biotechnological Equipment

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This study investigated the use of a high-pressure homogenization process for the production of high shear stress on Chlorella sp. cells in order to effectively degrade their cell walls. The highpressure homogenization process was conducted by using various pressure conditions in the range of 68.94À275.78 MPa with different numbers of repeated cycles. The optimal high-pressure homogenization pretreatment conditions were found to be two cycles at a pressure of 206.84 MPa, which provided an extraction yield of 20.35% (w/w) total cellular lipids. In addition, based on the confocal microscopic images of Chlorella sp. cells stained by using nile red, the walls of Chlorella sp. cells were disrupted more effectively using this process when compared with the disruption achieved by conventional lipid-extraction processes. By using the by-product of Chlorella sp., 47.3% ethanol was obtained from Saccharomyces cerevisiae cultures. These results showed that the highpressure homogenization process efficiently hydrolysed this marine resource for subsequent bioethanol production by using only water.

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“…HPH is a promising technique, particularly applied to micro- and macroalgae, as it is effective with respect to aqueous and/or fresh samples up to 25% w / w solids [167], omitting the energy intensive drying steps, and can be easily scaled up production purposes [168,169,170]. In HPH, the extraction process is facilitated by the mechanical disruption of the cell wall and cell membranes, enabling the non-selective release of the intracellular compounds.…”

Section: Nonconventional Extraction Of Carotenoidsmentioning

confidence: 99%

Innovative Alternative Technologies to Extract Carotenoids from Microalgae and Seaweeds

et al. 2016

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Marine microalgae and seaweeds (microalgae) represent a sustainable source of various bioactive natural carotenoids, including β-carotene, lutein, astaxanthin, zeaxanthin, violaxanthin and fucoxanthin. Recently, the large-scale production of carotenoids from algal sources has gained significant interest with respect to commercial and industrial applications for health, nutrition, and cosmetic applications. Although conventional processing technologies, based on solvent extraction, offer a simple approach to isolating carotenoids, they suffer several, inherent limitations, including low efficiency (extraction yield), selectivity (purity), high solvent consumption, and long treatment times, which have led to advancements in the search for innovative extraction technologies. This comprehensive review summarizes the recent trends in the extraction of carotenoids from microalgae and seaweeds through the assistance of different innovative techniques, such as pulsed electric fields, liquid pressurization, supercritical fluids, subcritical fluids, microwaves, ultrasounds, and high-pressure homogenization. In particular, the review critically analyzes technologies, characteristics, advantages, and shortcomings of the different innovative processes, highlighting the differences in terms of yield, selectivity, and economic and environmental sustainability.

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Effect of High Pressure Homogenization on Aqueous Phase Solvent Extraction of Lipids from Nannochloris Oculata Microalgae

Cited by 26 publications

References 13 publications

Renewable Sources of Plant Biostimulation: Microalgae as a Sustainable Means to Improve Crop Performance

Renewable Sources of Plant Biostimulation: Microalgae as a Sustainable Means to Improve Crop Performance

Effective production of bioenergy from marineChlorellasp. by high-pressure homogenization

Innovative Alternative Technologies to Extract Carotenoids from Microalgae and Seaweeds

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