Dilute acid pretreatment of rapeseed straw for fermentable sugar generation

Castro, Eulógio; Díaz, María José Moreno; Cara, Cristóbal; Ruiz, Encarnación; Romero, Inmaculada; Moya, Manuel

doi:10.1016/j.biortech.2010.08.057

Cited by 61 publications

(34 citation statements)

References 20 publications

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“…In this study we examined different pretreatment conditions for two different pretreatment technologies: dilute acid and alkaline peroxide pretreatment. We determined that the content of the raw material is in agreement with the previous studies [13,14]. For dilute acid pretreatment we focused on three pretreatment conditions: particle size, solid loading and acid concentration.…”

Section: Discussionsupporting

confidence: 72%

“…In the literature, the effects of three variables of dilute acid pretreatment, time, and acid concentration 7,13,25 were widely examined for optimization of lignocellulosic ethanol production processes. Whereas, studies on the effect of the solid loading (lignocellulosic biomass/ liquid ratio) and biomass size on pretreatment are rare.…”

Section: Optimization Of Dilute Acid Pretreatmentmentioning

confidence: 99%

“…Several methods have been applied for pretreatment of lignocellulosic waste materials. The pretreatment by dilute acid and alkaline peroxide have proven to be efficient process for wide range of lignocellulosic waste materials [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimization of dilute acid and alkaline peroxide pretreatment to enhance bioethanol production from wheat straw by co-fermentation

Karagöz¹,

Özkan²

2013

Turk J Bioch

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Section: Discussionsupporting

confidence: 72%

Section: Optimization Of Dilute Acid Pretreatmentmentioning

confidence: 99%

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Optimization of dilute acid and alkaline peroxide pretreatment to enhance bioethanol production from wheat straw by co-fermentation

Karagöz¹,

Özkan²

2013

Turk J Bioch

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“…However, the natural recalcitrance of bamboo lignocellulose makes it difficult to be converted into fuels, power, heat, and value-added chemicals. Although a variety of pretreatment methods, including physical, biological, chemical, and combination pretreatments, have been used in the biomass materials biorefinery process, leading lignocellulose pretreatment technologies still suffer from severe reaction conditions, the possibility of serious pollution, narrow substrate applicability, low reaction efficiency, and high capital investment (Wyman et al 2005;Leenakul and Tippayawong 2010). Therefore, it is imperative to explore an efficient, environmentally friendly, and cost-competitive way to pretreat bamboo residue for biorefinery processes.…”

Section: Introductionmentioning

confidence: 99%

Active Oxygen and Solid Alkali Pretreatment of Bamboo Residue: Features of Hemicellulose during the Cooking Process

Xiong

Luo

et al. 2017

BioRes

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Bamboo residue was treated with an active oxygen (O2) and solid alkali (MgO) (CAOSA) process, which was developed recently by the authors owing to its environmentally friendly and high-efficiency characteristics. During the cooking process, 93.0% of lignin and 62.1% of hemicellulose were removed from the raw material, which resulted in a cellulose-rich pulp. This indicated that this cooking process is efficient to fractionate the bamboo residue into cellulose, hemicellulose, and lignin as a pretreatment for biomass conversion. The structural features of the hemicellulose from the pretreated bamboo residue were analyzed for comparison with that of the raw materials. The molecular structure of the hemicellulose fractions obtained from both the raw bamboo and pulp consisted of a (1→4)-β-D-Xylp backbone substituted with α-L-Araf and 4-O-methyl-α-D-glucuronic acid. The hemicellulose with more side chains tended to be more easily removed from the bamboo cell wall during the CAOSA process. Furthermore, the fractions of hemicellulose exhibited much lower thermal stabilities after the cooking process than the raw material.

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“…Nowadays, this residual biomass that remains in the fields after seed harvest, is poorly exploited (Wood et al, 2014) and it could be used as a feedstock for ethanol production by means of a biochemical process (Castro et al, 2011). The first step in the conversion of lignocellulosic biomass into fuels or chemicals typically involves a biomass pretreatment step (Wettstein et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Hemicellulose-derived sugars solubilisation of rape straw. Cofermentation of pentoses and hexoses by Escherichia coli

López-Linares

Cara-Corpas

Ruiz

et al. 2015

Span. j. agric. res.

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Bioconversion of hemicellulose sugars is essential for increasing fuel ethanol yields from lignocellulosic biomass. We report for the first time with rape straw, bioethanol production from hemicellulose sugars. Rape straw was pretreated at mild conditions with sulfuric acid to solubilize the hemicellulose fraction. This pretreatment allows obtaining a prehydrolysate, consisting basically in a solution of monomeric hemicellulosic sugars, with low inhibitor concentrations. The remaining water insoluble solid constitutes a cellulose-enriched, free of extractives material. The influence of temperature (120ºC and 130ºC), acid concentration (2-4% w/v) and pretreatment time (30-180 min) on hemicellulose-derived sugars solubilisation was evaluated. The highest hemicellulosic sugars recovery, 72.3%, was achieved at 130ºC with 2% sulfuric acid and 60 min. At these conditions, a concentrated sugars solution, 52.4 g/L, was obtained after three acid consecutive contacts, with 67% xylose and acetic acid concentration above 4.5 g/L. After a detoxification step by activated charcoal or ion-exchange resin, prehydrolysate was fermented by ethanologenic Escherichia coli. An alcoholic solution of 25 g/L and 86% of theoretical ethanol yield was attained after 144 h when the prehydrolysate was detoxified by ion-exchange resin. The results obtained in the present work show sulfuric acid pretreatment under mild conditions and E. coli as an interesting process to exploit hemicellulosic sugars in rape straw.Additional key words: agricultural residue; acid pretreatment; xylose; E. coli; bioethanol production

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Dilute acid pretreatment of rapeseed straw for fermentable sugar generation

Cited by 61 publications

References 20 publications

Optimization of dilute acid and alkaline peroxide pretreatment to enhance bioethanol production from wheat straw by co-fermentation

Optimization of dilute acid and alkaline peroxide pretreatment to enhance bioethanol production from wheat straw by co-fermentation

Active Oxygen and Solid Alkali Pretreatment of Bamboo Residue: Features of Hemicellulose during the Cooking Process

Hemicellulose-derived sugars solubilisation of rape straw. Cofermentation of pentoses and hexoses by Escherichia coli

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