Oil recovery from wet Euglena gracilis by shaking with liquefied dimethyl ether

Sakuragi, Kiyoshi; Li, Peng; Aoki, Nobuo; Otaka, Maromu; Makino, Hisao

doi:10.1016/j.fuproc.2016.03.005

Cited by 20 publications

(15 citation statements)

References 18 publications

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“…Previous works showed that solvent-to-sample ratio is a key factor for maximizing oil recoveries. DME consumption was found to be positively correlated to lipid yields in both, fixed-bed [29,30,33,100] and batch [101] extractions. As an example, Boonnoun et al reported an increase in oil yield by a factor of 6 after changing the amount of DME from 6 to 200 g when extracting Haematococcus pluvialis [30].…”

Section: Study Implications and Limitationsmentioning

confidence: 95%

Extraction of common microalgae by liquefied dimethyl ether: influence of species and pretreatment on oil yields and composition

Bauer

Konnerth

Kruse

2020

Biomass Conv. Bioref.

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Liquefied dimethyl ether (DME) is regarded as a promising, green solvent for biomass lipid extractions. It is non-toxic, applicable to wet feedstocks, and allows easy product separation by pressure reduction. Yet, knowledge about its usability in combination with oleaginous microalgae is limited. In the current work, four common microalgae and cyanobacteria species were used to study DME extraction characteristics: Arthrospira platensis, Nannochloropsis gaditana, Phaeodactylum tricornutum, and Scenedesmus almeriensis. Dried samples were subjected to a batch DME extraction and compared to a standard chloroform/methanol procedure. To evaluate the influence of pretreatment, particle size distributions of two different milling sequences (knife- and cryo-milling) and the resulting effects on DME extraction and oil composition were addressed. Additionally, an algae washing procedure was tested. DME extractions resulted in oil yields of 0.5–2.7% of dry mass (equal to 5–19% of total lipids) without further pretreatment. Cryo-milling reduced median particle sizes by 25–87% and simultaneously increased lipid yields to 1.7–5.6% of dry mass (17–50% of total lipids). Phaeodactylum tricornutum showed the highest extraction efficiency with DME, combined with a favorable fatty acid profile. Although being most affected by the additional milling pretreatment, Arthrospira platensis performed worst in both scenarios. DME extracted oils were generally characterized by enhanced contents of C14:0, C16:0, and C16:1 fatty acids. However, relative abundances were strongly influenced by the properties of the tested algae species. The additional cryo-milling pretreatment affected fatty acid compositions by increasing the shares of potentially valuable polyunsaturated fatty acids.

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Section: Study Implications and Limitationsmentioning

confidence: 95%

Extraction of common microalgae by liquefied dimethyl ether: influence of species and pretreatment on oil yields and composition

Bauer

Konnerth

Kruse

2020

Biomass Conv. Bioref.

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“…DME was suitable for lipid extraction from wet Euglena gracilis and extraction yields (32.5% of dry biomass) was comparable to that of the hexane Soxhlet (31.8% of dry biomass) . In work by Sakuragi et al, also with wet Euglena gracilis , approximately 96.7% of the total oil was obtained with a mixture of liquefied dimethyl ether at 20 °C for 5 min. According to Hoshino et al, among the different lipid extraction methods investigated for Arthrospira platensis , liquefied DME gave the highest total lipid yield (9.8 wt%), followed by hexane extraction (7.2 wt%), and SC‐CO 2 extraction (2.2 wt%).…”

Section: Lipid Extractionmentioning

confidence: 88%

Edible Oil Production From Microalgae: A Review

Zhao-hui

Wan

et al. 2018

Euro J Lipid Sci & Tech

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Microalgae are considered an interesting candidate for the sustainable production of edible oils. Because microalgae contain abundant polyunsaturated fatty acids (PUFA) and have high photosynthetic rates and high oil productivity, they are superior to terrestrial oleaginous crops for producing edible oils. Microalgae are cultivated in aquatic environments, and thus, oil extraction methods for microalgae must consider the influence of water. This paper provides an overview of the suitability of microalgal lipid compositions and proposes a selection of species for edible oil production. The numerous technologies currently available for pretreatment, wet extraction and the refining of edible oils from microalgae are collated and presented, with a primary focus on the key parameters influencing process performance. Furthermore, the paper presents a proposed solution for a microalgae integrated system for edible oil production, which is a possible future direction to develop an economical and environmentally friendly process for the resource utilization of microalgal biomass. Practical Application: Microalgae might be the most promising source of edible oils, with potential applications in food industrialization, due to its rich oil content and its characteristic fatty acid composition. The review provides a selection criterion of microalgal species to help researchers exploit microalgae to produce superior edible oils for human consumption. Various process parameters and wet extraction methods are discussed that may be conducive to improving process performance and achieving high oil recovery yields. By considering the maximum utilization of microalgal biomass, an integrated system in this review would assist in economical production during further studies. Microalgae are the most promising candidates for edible oil production. Cell disruption, extraction, and refining are important processes for microalgal oils and on this basis, wet extraction and resource utilization can further promote the economic feasibility of microalgal process.

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“…We used DME as an extraction solvent with "wet" biomaterials. [21][22][23][24][25][26][27][28][29] For energy-saving production of biofuels, liquefied DME is mainly studied as a solvent for extracting lipids from microalgae without any pretreatment, such as drying. [29][30][31][32][33][34] Liquefied DME extraction has been applied to extract catechins from green tea leaves without any pretreatment such as drying and milling.…”

Section: Introductionmentioning

confidence: 99%

Ethanol‐free extraction of resveratrol and its glycoside from Japanese knotweed rhizome by liquefied dimethyl ether without pretreatments

Kanda

Oishi

Machmudah

et al. 2020

Asia-Pacific J Chem Eng

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Herein, we carried out the extraction of polyphenol resveratrol and its glycoside (piceid) from raw Japanese knotweed via a simple method, employing dimethyl ether (DME) as the solvent. With DME extraction, the conventional drying and cell wall disruption steps can be left out. As a result, more resveratrol and piceid were obtained in DME extraction than in conventional ethanol extraction. Because the Hansen solubility parameters of DME are closer to ethanol than to water, it allowed us to extract resveratrol and piceid from raw Japanese knotweed, unlike water. Simultaneously, 83.5% of the initial water and 213 mg/g dry of organic extracts were extracted from raw Japanese knotweed. As DME extraction does not involve drying and grinding of the decomposed antioxidants, it is highly suitable for extracting antioxidants.

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Oil recovery from wet Euglena gracilis by shaking with liquefied dimethyl ether

Cited by 20 publications

References 18 publications

Extraction of common microalgae by liquefied dimethyl ether: influence of species and pretreatment on oil yields and composition

Extraction of common microalgae by liquefied dimethyl ether: influence of species and pretreatment on oil yields and composition

Edible Oil Production From Microalgae: A Review

Ethanol‐free extraction of resveratrol and its glycoside from Japanese knotweed rhizome by liquefied dimethyl ether without pretreatments

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