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Journal ArticleDOI

Oil production by oleaginous yeasts using the hydrolysate from pretreatment of wheat straw with dilute sulfuric acid

01 May 2011-Bioresource Technology (Elsevier)-Vol. 102, Iss: 10, pp 6134-6140
TL;DR: It is demonstrated that lipid production is a promising alternative to utilize hemicellulosic sugars obtained during pretreatment of lignocellulosics materials.
About: This article is published in Bioresource Technology.The article was published on 2011-05-01. It has received 418 citations till now. The article focuses on the topics: Hydrolysate & Cryptococcus curvatus.
Citations
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Journal ArticleDOI
TL;DR: The present review highlights the various enabling bioprocesses that can be employed for the generation of energy and various commodity chemicals in an integrated approach addressing sustainability.

478 citations


Cites background from "Oil production by oleaginous yeasts..."

  • ...…1992), flour extracts, grape must (Buzzini and Martini, 2000), radish brine (Malisorn and Suntornsuk, 2008), hydrolyzates of agricultural residue (Yu et al., 2011), distillery wastewater, municipal wastewater (Chi et al., 2011), food and feed waste (Schneider et al., 2012), cheese whey (Castanha…...

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Journal ArticleDOI
TL;DR: It may take more time for the lignocellulosic biofuels to hit the market place than previously projected because of the challenges listed and lack of government policies to create the demand for biofuel.
Abstract: Biofuels that are produced from biobased materials are a good alternative to petroleum based fuels. They offer several benefits to society and the environment. Producing second generation biofuels is even more challenging than producing first generation biofuels due the complexity of the biomass and issues related to producing, harvesting, and transporting less dense biomass to centralized biorefineries. In addition to this logistic challenge, other challenges with respect to processing steps in converting biomass to liquid transportation fuel like pretreatment, hydrolysis, microbial fermentation, and fuel separation still exist and are discussed in this review. The possible coproducts that could be produced in the biorefinery and their importance to reduce the processing cost of biofuel are discussed. About $1 billion was spent in the year 2012 by the government agencies in US to meet the mandate to replace 30% existing liquid transportation fuels by 2022 which is 36 billion gallons/year. Other countries in the world have set their own targets to replace petroleum fuel by biofuels. Because of the challenges listed in this review and lack of government policies to create the demand for biofuels, it may take more time for the lignocellulosic biofuels to hit the market place than previously projected.

409 citations

Journal ArticleDOI
TL;DR: This review examines aspects of oleaginous yeasts not covered in depth in other recent reviews, and proposes standardized terms for units that describe yeast cell mass and lipid production.

380 citations

Journal ArticleDOI
TL;DR: This review mainly presents information on SCO and its production using low-cost substrates and mostly focuses on lignocellulosic biomass and the possibility and potential of SCO industrialization is evaluated.

264 citations


Cites background from "Oil production by oleaginous yeasts..."

  • ...The sugar concentration of different lignocellulosic hydrolysates is usually low,which is not beneficial for the industrialization of SCO production (Economou et al., 2011b; Huang et al., 2009; Tsigie et al., 2011; Yu et al., 2011)....

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  • ...To date, SCO production from lignocellulosic biomass was usually carried out through a batch fermentation mode (Economou et al., 2011b; Huang et al., 2009; Huang et al., 2012b; Tsigie et al., 2011; Yu et al., 2011)....

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  • ...More recently, five oleaginous yeast strains, Cryptococcus curvatus, Rhodotorula glutinis, Rhodosporidium toruloides, Lipomyces starkeyi, and Yarrowia lipolytica, were used for SCO production on wheat straw hydrolysates, and Cryptococcus curvatus showed the highest lipid yield (Yu et al., 2011)....

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  • ...Fermentation mode To date, SCO production from lignocellulosic biomass was usually carried out through a batch fermentation mode (Economou et al., 2011b; Huang et al., 2009; Huang et al., 2012b; Tsigie et al., 2011; Yu et al., 2011)....

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  • ...…most studies on lipid production using lignocellulosic biomass mainly used simple hydrolysis and detoxification methods, and, thus, the lipid yield on lignocellulosic hydrolysates was low (Economou et al., 2011b; Huang et al., 2009; Huang et al., 2012b; Tsigie et al., 2011; Yu et al., 2011)....

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Journal ArticleDOI
TL;DR: The lignocellulosic SCO-based biorefinery will be feasible only if a combination of low- and high-value lipids are coproduced, while lignin and protein are upgraded to high- value products.

253 citations

References
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Journal ArticleDOI

25,389 citations


"Oil production by oleaginous yeasts..." refers methods in this paper

  • ...The total reducing sugars were determined by the dinitrosalicylic acid method as described by Miller (1959)....

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01 Jan 2008
TL;DR: The NREL Laboratory Analytical Procedures for standard biomass analysis are available electronically at DISCLAIMER These standard Biomass Analytical Methods (" Methods ") are provided by the National Renewable Energy Laboratory (" NREL "), which is operated by the Alliance for Sustainable Energy, LLC (" ASE ") for the Department Of Energy as discussed by the authors.
Abstract: NREL Laboratory Analytical Procedures for standard biomass analysis are available electronically at DISCLAIMER These Standard Biomass Analytical Methods (" Methods ") are provided by the National Renewable Energy Laboratory (" NREL "), which is operated by the Alliance for Sustainable Energy, LLC (" ASE ") for the Department Of Energy. Access to and use of these Methods shall impose the following obligations on the user. The user is granted the right, without any fee or cost, to use, copy, modify, alter, enhance and distribute these Methods for any purpose whatsoever, except commercial sales, provided that this entire notice appears in all copies of the Methods. Further, the user agrees to credit NREL/ASE in any publications that result from the use of these Methods. The names NREL/ASE, however, may not be used in any advertising or publicity to endorse or promote any products or commercial entity unless specific written permission is obtained from NREL/ASE. The user also understands that NREL/ASE is not obligated to provide the user with any support, consulting, training or assistance of any kind with regard to the use of these Methods or to provide the user with any updates, revisions or new versions.

4,862 citations

01 Jan 2012
TL;DR: NREL Laboratory Analytical Procedures for standard biomass analysis are available electronically at DISCLAIMER These Standard Biomass Analytical Methods are provided by the National Renewable Energy Laboratory, which is operated by the Alliance for Sustainable Energy, LLC, LLC.

3,655 citations

Journal ArticleDOI
TL;DR: Effective parameters in pretreatment of lignocelluloses, such as crystallinity, accessible surface area, and protection by lignin and hemicellulose are described first, and several pretreatment methods are discussed and their effects on improvement in ethanol and/or biogas production are described.
Abstract: Lignocelluloses are often a major or sometimes the sole components of different waste streams from various industries, forestry, agriculture and municipalities. Hydrolysis of these materials is the first step for either digestion to biogas (methane) or fermentation to ethanol. However, enzymatic hydrolysis of lignocelluloses with no pretreatment is usually not so effective because of high stability of the materials to enzymatic or bacterial attacks. The present work is dedicated to reviewing the methods that have been studied for pretreatment of lignocellulosic wastes for conversion to ethanol or biogas. Effective parameters in pretreatment of lignocelluloses, such as crystallinity, accessible surface area, and protection by lignin and hemicellulose are described first. Then, several pretreatment methods are discussed and their effects on improvement in ethanol and/or biogas production are described. They include milling, irradiation, microwave, steam explosion, ammonia fiber explosion (AFEX), supercritical CO2 and its explosion, alkaline hydrolysis, liquid hot-water pretreatment, organosolv processes, wet oxidation, ozonolysis, dilute- and concentrated-acid hydrolyses, and biological pretreatments.

2,510 citations


"Oil production by oleaginous yeasts..." refers background in this paper

  • ...ods, dilute sulfuric acid is the most commonly applied catalyst (Taherzadeh and Karimi, 2008)....

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Journal ArticleDOI
TL;DR: In this article, the authors discuss the generation of inhibitors during degradation of lignocellulosic materials, and the effect of these on fermentation yield and productivity, and their interaction effects are reviewed.

2,373 citations


"Oil production by oleaginous yeasts..." refers background in this paper

  • ...cerevisiae during ethanol fermentation (Palmqvist and Hahn-Hagerdal, 2000), and this potential conversion by C....

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  • ...However, the mechanism for furfural inhibition in the oleaginous yeast is most likely different than that of HMF, although the two chemicals have similar inhibition mechanisms in other yeasts for ethanol fermentation (Palmqvist and Hahn-Hagerdal, 2000)....

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  • ...curvatus was more sensitive to furfural than was lipid accumulation, which was also seen during ethanol production (Palmqvist and Hahn-Hagerdal, 2000)....

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