Bioethanol production from Eucalyptus grandis hemicellulose recovered before kraft pulping using an integrated biorefinery concept

Guigou, Mairan; Cebreiros, Florencia; Cabrera, María Noel; Ferrari, Mario Daniel; Lareo, Claudia

doi:10.1007/s13399-016-0218-6

Cited by 6 publications

(5 citation statements)

References 18 publications

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“…In general, hydrolysates from lignocellulosic byproducts, such as palm press fiber [51], sugarcane bagasse [52], sorghum stalks [53], or cotton stalks [54] achieved ethanol yields between 0.30 and 0.46 g ethanol/g sugar. However, fermentation from E. grandis hydrolysate enabled an ethanol yield of 0.21 g ethanol/g sugar [14]. In contrast, López-Linares et al [55] reached ethanol yields of 0.46-0.47 g/g when employing exhausted olive pomace hydrolysate with the bacteria E. coli SL100, with a maximum ethanol concentration of 13.6-14.5 g/L.…”

Section: Hydrolysates Fermentation For Ethanol Productionmentioning

confidence: 94%

“…In order to overcome these difficulties, the removal of inhibitory compounds from the hemicellulosic hydrolysates by chemical, biological or physical methods is essential [6,13]. Detoxification strategies are the most employed and efficient procedures to tackle inhibition problems, namely evaporation, overliming, and liquid-solid extraction (activated charcoal, ion exchange) [13,14]. The main disadvantage of employing these procedures is the increase in the cost due to the additional separation steps to be made, and therefore, alternative strategies to surpass the inhibitory effect of degradation compounds have to be considered.…”

Section: Introductionmentioning

confidence: 99%

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Hemicellulosic Bioethanol Production from Fast-Growing Paulownia Biomass

Domínguez¹,

Río

Romaní

et al. 2021

Processes

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In order to exploit a fast-growing Paulownia hardwood as an energy crop, a xylose-enriched hydrolysate was obtained in this work to increase the ethanol concentration using the hemicellulosic fraction, besides the already widely studied cellulosic fraction. For that, Paulownia elongata x fortunei was submitted to autohydrolysis treatment (210 °C or S0 of 4.08) for the xylan solubilization, mainly as xylooligosaccharides. Afterwards, sequential stages of acid hydrolysis, concentration, and detoxification were evaluated to obtain fermentable sugars. Thus, detoxified and non-detoxified hydrolysates (diluted or not) were fermented for ethanol production using a natural xylose-consuming yeast, Scheffersomyces stipitis CECT 1922, and an industrial Saccharomyces cerevisiae MEC1133 strain, metabolic engineered strain with the xylose reductase/xylitol dehydrogenase pathway. Results from fermentation assays showed that the engineered S. cerevisiae strain produced up to 14.2 g/L of ethanol (corresponding to 0.33 g/g of ethanol yield) using the non-detoxified hydrolysate. Nevertheless, the yeast S. stipitis reached similar values of ethanol, but only in the detoxified hydrolysate. Hence, the fermentation data prove the suitability and robustness of the engineered strain to ferment non-detoxified liquor, and the appropriateness of detoxification of liquor for the use of less robust yeast. In addition, the success of hemicellulose-to-ethanol production obtained in this work shows the Paulownia biomass as a suitable renewable source for ethanol production following a suitable fractionation process within a biorefinery approach.

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Section: Hydrolysates Fermentation For Ethanol Productionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Hemicellulosic Bioethanol Production from Fast-Growing Paulownia Biomass

Domínguez¹,

Río

Romaní

et al. 2021

Processes

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“…As compiled in Table 6, each organism presents some advantages and disadvantages for their industrial implementation [158]. Among these alternative organisms, Escherichia coli, Zymomonas mobilis and Pichia stipitis are worth mentioning, but others can be cited, such as Candida shehatae, Pachysolen tannophilus, Klebsiella oxytoca and Fusarium oxysporum [182][183][184]. Nevertheless, despite extensive research in this field, the majority of the studies concerning xylose (as the most relevant pentose) conversion to ethanol have been performed with only these few yeast species.…”

Section: Chemicals From Hemicellulosementioning

confidence: 99%

A Bibliometric Study of Scientific Publications regarding Hemicellulose Valorization during the 2000–2016 Period: Identification of Alternatives and Hot Topics

Abejón

2018

ChemEngineering

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A bibliometric analysis of the Scopus database was carried out to identify the research trends related to hemicellulose valorization from 2000 to 2016. The results from the analysis revealed an increasing number of annual publications, a high degree of transdisciplinary collaboration and prolific contributions by European researchers on this topic. The importance of a holistic approach to consider the simultaneous valorization of the three main components of lignocellulosic biomass (cellulose, hemicellulose and lignin) must be highlighted. Optimal pretreatment processes are critical for the correct fractionation of the biomass and the subsequent valorization. On the one hand, biological conversion of sugars derived from hemicellulose can be employed for the production of biofuel (ethanol) or chemicals such as 2,3-butadiene, xylitol and lactic acid. On the other hand, the chemical transformation of these sugars produces furfural, 5-hydroxyfurfural and levulinic acid, which must be considered very important starting blocks for the synthesis of organic derivatives.

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“…The extract obtained was highly concentrated in xylose and it was fermented by S. stipitis. After the removal of inhibitory compounds by using ethyl acetate extraction, the fermentation of the concentrated hydrolysates generated an ethanol concentration of 5.0 g•L −1 , and an ethanol yield of 0.21 g•g −1 [189]. During the Kraft cooking process, a fraction of hemicelluloses is dissolved in the black liquor and burned in the recovery boiler together with lignin.…”

Section: Converting Pulp and Paper Mills Into Biorefineriesmentioning

confidence: 99%

“…However, the removal method chosen should not affect the quality of the pulp [190][191][192]. Therefore, this process seems a promising approach for ethanol production by the conversion of Kraft pulping mills into forest-based biorefineries producing ethanol from hemicelluloses fraction and Kraft pulp from cellulose, as proposed and studied by several authors [189,190,[193][194][195]. Sugars from hemicelluloses can also be used as substrates to produce acetone and butanol, succinic acid, lactic acid, xylooligosaccharides, furfural, and xylitol.…”

Section: Converting Pulp and Paper Mills Into Biorefineriesmentioning

confidence: 99%

Second Generation Bioethanol Production: On the Use of Pulp and Paper Industry Wastes as Feedstock

2018

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Due to the health and environment impacts of fossil fuels utilization, biofuels have been investigated as a potential alternative renewable source of energy. Bioethanol is currently the most produced biofuel, mainly of first generation, resulting in food-fuel competition. Second generation bioethanol is produced from lignocellulosic biomass, but a costly and difficult pretreatment is required. The pulp and paper industry has the biggest income of biomass for non-food-chain production, and, simultaneously generates a high amount of residues. According to the circular economy model, these residues, rich in monosaccharides, or even in polysaccharides besides lignin, can be utilized as a proper feedstock for second generation bioethanol production. Biorefineries can be integrated in the existing pulp and paper industrial plants by exploiting the high level of technology and also the infrastructures and logistics that are required to fractionate and handle woody biomass. This would contribute to the diversification of products and the increase of profitability of pulp and paper industry with additional environmental benefits. This work reviews the literature supporting the feasibility of producing ethanol from Kraft pulp, spent sulfite liquor, and pulp and paper sludge, presenting and discussing the practical attempt of biorefineries implementation in pulp and paper mills for bioethanol production.

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Bioethanol production from Eucalyptus grandis hemicellulose recovered before kraft pulping using an integrated biorefinery concept

Cited by 6 publications

References 18 publications

Hemicellulosic Bioethanol Production from Fast-Growing Paulownia Biomass

Hemicellulosic Bioethanol Production from Fast-Growing Paulownia Biomass

A Bibliometric Study of Scientific Publications regarding Hemicellulose Valorization during the 2000–2016 Period: Identification of Alternatives and Hot Topics

Second Generation Bioethanol Production: On the Use of Pulp and Paper Industry Wastes as Feedstock

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