Extraction Technology

Pfennig, Andreas; Delinski, Dirk; Johannisbauer, W.; Josten, Horst

doi:10.1002/9783527635122.ch6

Cited by 8 publications

(12 citation statements)

References 21 publications

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“…In addition to pure ethanol, which had the highest solubility for rutin, we also investigated the extraction kinetics of 70 vol % ethanol, as the addition of water has been shown to improve the extraction kinetics for rutin from plant material. 16 To determine the extraction kinetics shown in Figure 4, 3 g of dried leaf biomass with a particle size between 1.0 and 1.4 mm, which is typical for industrial-scale extractions from plant biomass, 31 was extracted in 0.2 L of each solvent, respectively. Offline HPLC samples (0.8 mL of each) were taken over 6 h at room temperature in stirred batch extraction mode.…”

Section: Methodsmentioning

confidence: 99%

“…16,27 Additionally, the extraction method, biomass pretreatment, and particle size must be optimized on the basis of the extraction kinetics of small-scale industrial-like extractions and an extraction time must be determined, which maximizes the space–time yield. 31 To foster the sustainability of the extraction process, energy costs, extraction time, and solvent input should be minimized.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tomato’s Green Gold: Bioeconomy Potential of Residual Tomato Leaf Biomass as a Novel Source for the Secondary Metabolite Rutin

et al. 2019

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At the end of the annual horticultural production cycle of greenhouse-grown crops, large quantities of residual biomass are discarded. Here, we propose a new value chain to utilize horticultural leaf biomass for the extraction of secondary metabolites. To increase the secondary metabolite content of leaves, greenhouse-grown crop plants were exposed to low-cost abiotic stress treatments after the last fruit harvest. As proof of concept, we evaluated the production of the flavonoid rutin in tomato plants subjected to nitrogen deficiency. In an interdisciplinary approach, we observed the steady accumulation of rutin in young plants under nitrogen deficiency, tested the applicability of nitrogen deficiency in a commercial-like greenhouse, developed a high efficiency extraction for rutin, and evaluated the acceptance of the proposed value chain by its key actors economically. On the basis of the positive interdisciplinary evaluation, we identified opportunities and challenges for the successful establishment of horticultural leaf biomass as a novel source for secondary metabolites.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tomato’s Green Gold: Bioeconomy Potential of Residual Tomato Leaf Biomass as a Novel Source for the Secondary Metabolite Rutin

et al. 2019

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“…The main disadvantage of immersion compared with percolation is the need for mechanical separation of the solids after extraction, either by filtration or by centrifugation. This is the reason that the percolation principle is preferred over immersion technology for most industrial scale oil extraction (Pfennig et al, 2011). However, material must not be presented in the form of meal, as this would make solvent percolation impossible.…”

Section: Introductionmentioning

confidence: 99%

Extrusion of Antarctic krill (Euphausia superba) meal and its effect on oil extraction

Yin

Liu

Fan

et al. 2014

Int J of Food Sci Tech

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Summary Antarctic krill meal as well as mixed krill meal and starches were extruded through a twin‐screw extruder. The extrudates were hard and porous agglomerates. The pellets still showed intact structure without obvious disintegration in response to hexane extraction. The oil recovery rates for raw krill meal and the extrudate of single krill meal were 55.08% and 59.08%, respectively. For extrudates, oil recovery rate increased along with the increasing additive amount of starches, with a maximum of 83.13%. Oil extracted from raw krill meal contained 49.30% of triglycerides (TG), 44.16% of phospholipids (PL), 1.45% of free fatty acids (FFA) and 4.69% of cholesterols (CHO). Meanwhile, polyunsaturated fatty acids (PUFA), monounsaturated fatty acids (MUFA) and saturated fatty acids (SFA) account for 20.89%, 37.84% and 41.27% of the total fatty acids, respectively. By contrast, oils extracted from extrudates contained more TG but less PL and more SFA but less PUFA.

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“…The reason for the increase in extraction efficiency with smaller particle sizes is the dependence of diffusion on the mass or size of the particles. A smaller particle size reduces the time required for the diffusion of solvents, thus facilitating the direct extraction of the metabolites in the solvents (Pfenning et al ., ). Coats and Wingard () reported how the size and shape of particles significantly affected the extraction of oils from seeds and Sari and Velioglu (), described how the theanine content determined in tea varied according to the size of the ground tea‐leaf particles.…”

Section: Sample Preparationmentioning

confidence: 99%