Enzyme-Supported Oil Extraction from Jatropha curcas Seeds

Winkler, Elisabeth; Foidl, Nikolaus; Gübitz, Georg; Staubmann, Ruth; Steiner, Walter

doi:10.1007/978-1-4612-2312-2_39

Cited by 16 publications

(11 citation statements)

References 5 publications

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“…Table 2 also shows the result of using various commercial preparations of enzymes. Among single enzymes used, neutrase gave a significantly (P \ 0.05) higher oil yield (68.28), which conformed to the early observation that hemicellulases and cellulases were less effective than proteases in oil extraction from some seeds such as Jatropha curcas L. seeds [30,31]. Cellulase, pentosanase, neutrase and fungal amylase increased the oil yield by 23.95, 16.65, 37.18 and 26.72%, respectively, compared with the control, and the differences between the four enzymes treatment and the control with respect to the oil yield were significantly, therefore the four enzymes were all tested in subsequent experiments.…”

Section: Effects Of Single Enzymes and Cooperative Multi-enzymes On Esupporting

confidence: 77%

Optimization of the Aqueous Enzymatic Extraction of Wheat Germ Oil Using Response Surface Methodology

Song

Zhou

et al. 2010

J Americ Oil Chem Soc

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A process of aqueous enzymatic extraction of wheat germ was carried out by a multi-enzyme preparation consisting of cellulase, pentosanase, neutrase and fungal amylase (CPNF, 2:1:2:1 w/w/w/w). Hydro-thermal heating (at 112°C for 60 min) was more effective than oven-drying regarding emulsified oil yield. Wheat germ was ground with a rate of 10,000 rpm for 90 s. The adding level (w/w) of multienzyme preparation of CPNF was 1.6%. Response surface methodology was used to obtain the desired data in the process optimization. The optimal set of variables was water to wheat germ ratio (v/wt, mL/g) of 3.46, pH of 5.24, temperature of 48.49°C and time of 6 h. The emulsified oil yield was 86.74% at the optimal levels of the tested factors. Compared with organic solvent extracted oil, the content of free fatty acid of AEE extracted oil was higher and the color was slightly darker, while the peroxide value was lower and the oxidative stability was higher owing to high content of a-tocopherol. This technique for recovering oil from fresh wheat germ with enzymes is a significant improvement in both oil yield and quality over the traditional organic solvent process.

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Section: Effects Of Single Enzymes and Cooperative Multi-enzymes On Esupporting

confidence: 77%

Optimization of the Aqueous Enzymatic Extraction of Wheat Germ Oil Using Response Surface Methodology

Song

Zhou

et al. 2010

J Americ Oil Chem Soc

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“…The n-hexane method is 347 the most common and results in the highest oil yield, but also takes most time. In aqueous 348 enzymatic oil extraction the use of alkaline protease gave the best results for both available 349 studies [69,70]. Furthermore, it is shown that ultrasonication pretreatment is a useful step 350 in aqueous oil extraction [70].…”

Section: Mechanical Expellers 330mentioning

confidence: 99%

Jatropha bio-diesel production and use

Achten

Verchot

Franken³

et al. 2008

Biomass and Bioenergy

1,059

638

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19The interest in using Jatropha curcas L. (JCL) as a feed stock for the production of 20 bio-diesel is rapidly growing. The properties of the crop and its oil have persuaded 21 investors, policy makers and Clean Development Mechanism (CDM) project developers to 22 consider JCL as a substitute for fossil fuels to reduce greenhouse gas emissions. However, 23 JCL is still a wild plant of which basic agronomic properties are not thoroughly understood 24 and the environmental effects have not been investigated yet. Gray literature reports are 25 very optimistic on simultaneous wasteland reclamation capability and oil yields, further 26 fueling the Jatropha bio-diesel hype. In this paper, we give an overview of the currently 27 available information on the different process steps of the production process of bio-diesel 28 from JCL, being cultivation and production of seeds, extraction of the oil, conversion to 29 and the use of the bio-diesel and the by-products. Based on this collection of data and 30 information the best available practice, the shortcomings and the potential environmental 31 risks and benefits are discussed for each production step. The review concludes with a call 32 for general precaution and for science to be applied. 33 34 Keywords 35Jatropha curcas; physic nut; cultivation; bio-energy; energy conversion, bio-fuel; 36 environmental impact; greenhouse gas balance; land use impact; human health 37 2

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“…This deciduous tree species is tolerant to aridity, mild frosts and marginality of soils (Foidl et al 1996, PIER 2004, Sirisomboon et al 2007). Its seeds are rich in highly extractible oil (Winkler et al 1997, Openshaw 2000. The oil produces minimal smoke and engine wear and has better efficiency than diesel (Foidl et al 1996, Gübitz et al 1999 in its pure, mixed and biodiesel forms (Foidl et al 1996, Heller 1996, Sirisomboon et al 2007, Achten et al 2008.…”

Section: Introductionmentioning

confidence: 99%

Shoot allometry ofJatropha curcas

Ghezehei

Annandale

Everson

2009

Southern Forests: a Journal of Forest Science

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The South African government has banned planting of Jatropha curcas L. (Jatropha), potentially a multipurpose tree and biofuel source, owing to insufficient knowledge about the species. Use of allometry as a non-destructive method of monitoring growth and biomass attributes of Jatropha was investigated. The objectives were to examine: reliability of allometry between above-ground variables and basal diameter and crown depth of Jatropha; effects of below-ground interspecies competition and tree spacing on allometry; and validity of these relationships with independent data. The study site was Ukulinga Research Farm, South Africa. Destructive sampling was carried out in March 2008, and tree height and basal diameter were measured periodically during March 2005 to April 2007. Regression analysis and analyses of covariance were used to analyse the data. The height-diameter equation developed by destructive sampling was validated using independent data. Highly significant allometric regressions resulted from using basal diameter (r ≥ 0.89) and crown depth (r ≥ 0.94). Stem diameter had linear relationships with wood and foliage biomass percentages (r = 0.91). Height-diameter equations were equivalent across competition and tree spacing treatments. Predicted and measured tree heights were linearly related (r > 0.97). It could be concluded that above-ground allometry of Jatropha was very reliable and not significantly affected by either below-ground interspecies competition or tree spacing. The site-specific allometric equations are useful for accurate and non-destructive estimations of Jatropha growth under various growing and (non-pruning) tree management conditions. The equations presented here are, however, not universally applicable.

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Enzyme-Supported Oil Extraction from Jatropha curcas Seeds

Cited by 16 publications

References 5 publications

Optimization of the Aqueous Enzymatic Extraction of Wheat Germ Oil Using Response Surface Methodology

Optimization of the Aqueous Enzymatic Extraction of Wheat Germ Oil Using Response Surface Methodology

Jatropha bio-diesel production and use

Shoot allometry ofJatropha curcas

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