Integrated production of cellulosic bioethanol and succinic acid from rapeseed straw after dilute-acid pretreatment

Kuglarz, Mariusz; Alvarado-Morales, Merlin; Dąbkowska, K.; Angelidaki, Irini

doi:10.1016/j.biortech.2018.05.099

Cited by 78 publications

(18 citation statements)

References 29 publications

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“…The initial sugar (xylose) content before succinic acid fermentation amounted to 40.2 ±1.7 g•dm -3 , which is about 10 % lower than xylose concentration after ethanol separation by membrane filtration. Sugar losses during feedstock neutralization, sterilization and dilution (nutrients addition) amounted to 10 %, which is in the range previously reported [6,7,11,12]. In case of fermentation without medium addition, a lag phase was observed during the 24 h of the process and about 50 % of the xylose was still present in the fermentation broth, which shows that that nutrients (nitrogen, minerals) availability could be a limiting factor in succinic acid production from xylose-rich residues, leading to lower sugar utilization (Table 3).…”

Section: Succinic Fermentation Of Xylose-rich Residuessupporting

confidence: 76%

“…In our previous studies, succinic acid was effectively produced from thin stillage after ethanol production without nutrients addition (sugar utilization: 86-90 %). However, sugar (xylose) content before fermentation was between 20-50 % lower compared to present study [11,12]. Fermentation with yeast extract as nitrogen source started without any lag phase and higher values of sugar utilization and succinic acid titer were obtained after application of higher yeast extract dosage (i.e.…”

Section: Succinic Fermentation Of Xylose-rich Residuescontrasting

confidence: 65%

“…Besides its traditional usage as isolation material and substrate used in textile industry, hemp has been tested as solid fuel as well as feedstock for biofuels (biogas, biohydrogen, bioethanol) [5,6] or bio-chemicals (succinic and lactic acid, furfural) production [7][8][9]. Additionally, hemp was tested as feedstock for integrated biofuels (bioethanol and biogas) [10] as well as bioethanol coupled with succinic acid production [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Integrated Production of Biofuels and Succinic Acid from Biomass after Thermochemical Pretreatments

Kuglarz

Grűbel

2018

Ecological Chemistry and Engineering S

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The aim of this study was to develop an effective thermochemical method for treatment of industrial hemp, in order to increase its bioconversion to biofuels and bio-products. Industrial hemp was subjected to various thermochemical pretreatments using: alkaline (3 % NaOH), oxidative (3 % H2O2 at pH 11.5) and glycerol-based methods (70-90 % of glycerol, 1-3 % NaOH), prior to enzymatic hydrolysis with Cellic® CTec2/Cellic® HTec2 (15 FPU∙g−1 glucan). Innovative pretreatment with glycerol fraction (80 % glycerol content, 2 % NaOH, 12.5 % biomass loading) showed to be superior over commonly used alkaline and oxidative methods with respect to by-products generation and sugar losses. Integrated process of ethanol production from enriched cellulose fraction (172 kg EtOH∙Mg−1 of dry hemp) and succinic production from xylose-rich residue after ethanol fermentation (59 kg∙Mg−1 of dry hemp) allowed to convert about 97 % of sugars released (glucose and xylose) during enzymatic hydrolysis of pre-treated biomass. The present study showed that it is possible to replace 50 % of the costly yeast extract, used during succinic fermentation as nitrogen source, by alternative nitrogen source (rapeseed cakes) without significant deterioration of succinic yield. Pretreatment liquor after lignin precipitation (52 kg∙Mg−1 of biomass treated) exhibited a high biodegradability (92 %) and allowed to produce 420 m3 CH4/Mg VS). Results obtained in this study clearly document the possibility of biofuels (bioethanol, biogas) and bio-chemicals production from industrial hemp, in a biorefinery approach.

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Section: Succinic Fermentation Of Xylose-rich Residuessupporting

confidence: 76%

Section: Succinic Fermentation Of Xylose-rich Residuescontrasting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

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Integrated Production of Biofuels and Succinic Acid from Biomass after Thermochemical Pretreatments

Kuglarz

Grűbel

2018

Ecological Chemistry and Engineering S

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“…En cuanto al aprovechamiento de la biomasa residual del cacao con nes energéticos, Kuglarz et al (2018) evaluaron el potencial de producción de biogás por digestión anaerobia para el cantón Balao, región con la mayor densidad de producción de biomasa residual del cacao. El biogás se destina a la generación eléctrica que podría satisfacer el 88 % de la demanda energética en este cantón.…”

Section: El Bioetanol En Ecuadorunclassified

Estimación del potencial de producción de bioetanol para los residuos de la corteza del cacao en Ecuador

Avila

Noboa

Rivera

et al. 2020

CTA

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En el presente estudio se estima el potencial de producción de bioetanol en Ecuador, teóricamente obtenible a partir del aprovechamiento de residuos de cacao; para esto, se formuló un modelo matemático de la hidrólisis ácida en la celulosa de la corteza del cacao y su conversión a etanol por fermentación. Metodológicamente, el estudio se apoya en documentación oficial sobre la cantidad de biomasa residual de este cultivo nacional y provincial, y en un modelo cinético adaptado al caso en estudio. Se obtuvo 8,28 Mml de bioetanol, de cuya mezcla con gasolina extra, en una proporción 5:95 v/v, resulta la gasolina Ecopaís E5C. Se estimó una producción de 166 Mml de E5C, correspondiente al 10 % de la producción nacional para el año 2017 y 56 % de la producción para el año 2014, año en el que se estimó la biomasa residual de cacao. Asimismo, la región Costa aporta el 71 % de la producción nacional de bioetanol y de E5C, liderado por la provincia de Guayas, en la cual la gasolina E5 representa el 25 % de su consumo en 2017. Se concluye que esta ruta de producción de bioetanol es una opción atractiva de diversificación respecto al cultivo de la caña de azúcar, y agrega valor a una biomasa residual desechada actualmente. Los resultados teóricos constituyen la base para estudios más detallados en provincias que combinan un alto potencial de residuos del cacao y un consumo creciente de E5C, pero deben complementarse con investigaciones de corte experimental para corroborar su validez y aportar elementos que determinen la viabilidad de la ruta de producción de bioetanol estudiada.

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“…The use of lignocellulosic biomass, which includes energy crops, perennial grasses, agro-residues, and residues from the forest industry, has gained worldwide attention in recent years, as it is cheap, available and does not compete with the food industry [1]. A wide range of biofuels and value-added chemicals can be obtained from this kind of biomass including bioethanol [2,3], biogas [4,5], hydrogen [6,7], butanol [8,9], as well as succinic acid [10], furfural [11] and 3-hydroxypropionic acid [12]. Lignocellulosic materials, however, have a complex structure consisting of cellulose, hemicellulose and lignin, and for that reason they are very recalcitrant and resist enzymatic attack.…”

Section: Introductionmentioning

confidence: 99%

Two-Stage Pretreatment to Improve Saccharification of Oat Straw and Jerusalem Artichoke Biomass

et al. 2019

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Pretreatment is a necessary step when lignocellulosic biomass is to be converted to simple sugars; however single-stage pretreatment is often insufficient to guarantee full availability of polymeric sugars from raw material to hydrolyzing enzymes. In this work, the two-stage pretreatment with use of acid (H2SO4, HNO3) and alkali (NaOH) was applied in order to increase the susceptibility of Jerusalem artichoke stalks (JAS) and oat straw (OS) biomass on the enzymatic attack. The effect of the concentration of reagents (2% and 5% w/v) and the order of acid and alkali sequence on the composition of remaining solids and the efficiency of enzymatic hydrolysis was evaluated. It was found that after combined pretreatment process, due to the removal of hemicellulose and lignin, the content of cellulose in pretreated biomass increased to a large extent, reaching almost 90% d.m. and 95% d.m., in the case of JAS and OS, respectively. The enzymatic hydrolysis of solids remaining after pretreatment resulted in the formation of up to 45 g/L of glucose, for both JAS and OS. The highest glucose yield was achieved after pretreatment with 5% nitric acid followed by NaOH, and 90.6% and 97.6% of efficiency were obtained, respectively for JAS and OS.

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Integrated production of cellulosic bioethanol and succinic acid from rapeseed straw after dilute-acid pretreatment

Cited by 78 publications

References 29 publications

Integrated Production of Biofuels and Succinic Acid from Biomass after Thermochemical Pretreatments

Integrated Production of Biofuels and Succinic Acid from Biomass after Thermochemical Pretreatments

Estimación del potencial de producción de bioetanol para los residuos de la corteza del cacao en Ecuador

Two-Stage Pretreatment to Improve Saccharification of Oat Straw and Jerusalem Artichoke Biomass

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