Ethanol production from sugarcane bagasse by fed‐batch simultaneous saccharification and fermentation at high solids loading

Gao, Yao; Xu, Jingliang; Yuan, Zhenhong; Jiang, Jianchun; Zhang, Zhenjia; Li, Chunjie

doi:10.1002/ese3.257

Cited by 32 publications

(13 citation statements)

References 31 publications

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“…Bagassosis is an entity caused by an allergic reaction to bagasse dust which is a major remaining product of the sugarcane industry. This product is used in the manufacture of pulp, paper industries, as biofuel or in lacquerware crafts [1,2]. The size of the bagasse dust particle ranges from 0.08 to 9 µm.…”

mentioning

confidence: 99%

Bagassosis: A Case Report on Rare Hypersensitivity Pneumonitis

Choudhari¹,

Spalgais²,

Chaudhary³

et al. 2020

IJCR

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mentioning

confidence: 99%

Bagassosis: A Case Report on Rare Hypersensitivity Pneumonitis

Choudhari¹,

Spalgais²,

Chaudhary³

et al. 2020

IJCR

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“…3b) and 44% (Fig. 3c), respectively, the fermentation rates were higher than that of batch mode at the first 8 h due to the increment of system liquidity and exposing more available catalytic sites [48].…”

Section: Resultsmentioning

confidence: 99%

Enhanced co-generation of cellulosic ethanol and methane with the starch/sugar-rich waste mixtures and Tween 80 in fed-batch mode

Fan

et al. 2019

Biotechnol Biofuels

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Background The mixed-feedstock fermentation is a promising approach to enhancing the co-generation of cellulosic ethanol and methane from sugarcane bagasse (SCB) and molasses. However, the unmatched supply of the SCB and molasses remains a main obstacle built upon binary feedstock. Here, we propose a cellulose–starch–sugar ternary waste combinatory approach to overcome this bottleneck by integrating the starch-rich waste of Dioscorea composita Hemls. extracted residue (DER) in mixed fermentation. Results The substrates of the pretreated SCB, DER and molasses with varying ratios were conducted at a relatively low solids loading of 12%, and the optimal mixture ratio of 1:0.5:0.5 for the pretreated SCB/DER/molasses was determined by evaluating the ethanol concentration and yield. Nevertheless, it was found that the ethanol yield decreased from 79.19 ± 0.20 to 62.31 ± 0.61% when the solids loading increased from 12 to 44% in batch modes, regardless of the fact that the co-fermentation of three-component feedstock was performed under the optimal condition defined above. Hence, different fermentation processes such as fed-batch and fed-batch + Tween 80 were implemented to further improve the ethanol concentration and yield at higher solids loading ranging between 36 and 44%. The highest ethanol concentration of 91.82 ± 0.86 g/L (69.33 ± 0.46% of theoretical yield) was obtained with fed-batch + Tween 80 mode during the simultaneous saccharification and fermentation at a high solids loading of 44%. Moreover, after the ethanol recovery, the remaining stillage was digested for biomethane production and finally yielded 320.72 ± 6.98 mL/g of volatile solids. Conclusions Integrated DER into the combination of SCB and molasses would be beneficial for ethanol production. The co-generation of bioethanol and biomethane by mixed cellulose–starch–sugar waste turns out to be a sustainable solution to improve the overall efficacy in biorefinery.

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“…However, CRC hydrolysate contains low xylose and arabinose concentrations of only 14.18 and 0.65 g/L, respectively. A higher concentration of xylose has been detected in hydrolysate produced from various types of lignocellulosic biomass e.g., sugarcane bagasse (56 g/L), rice straw (44 g/L), and wheat straw (25 g/L) [ 35 , 36 , 37 ]. Generally, almost of pentose-fermenting yeasts cannot grow under high ethanol and inhibitor concentrations as well as under strictly anaerobic conditions.…”

Section: Discussionmentioning

confidence: 99%

Bioethanol Production from Cellulose-Rich Corncob Residue by the Thermotolerant Saccharomyces cerevisiae TC-5

Boonchuay

Techapun

Leksawasdi

et al. 2021

JoF

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This study aimed to select thermotolerant yeast for bioethanol production from cellulose-rich corncob (CRC) residue. An effective yeast strain was identified as Saccharomyces cerevisiae TC-5. Bioethanol production from CRC residue via separate hydrolysis and fermentation (SHF), simultaneous saccharification and fermentation (SSF), and prehydrolysis-SSF (pre-SSF) using this strain were examined at 35–42 °C compared with the use of commercial S. cerevisiae. Temperatures up to 40 °C did not affect ethanol production by TC-5. The ethanol concentration obtained via the commercial S. cerevisiae decreased with increasing temperatures. The highest bioethanol concentrations obtained via SHF, SSF, and pre-SSF at 35–40 °C of strain TC-5 were not significantly different (20.13–21.64 g/L). The SSF process, with the highest ethanol productivity (0.291 g/L/h), was chosen to study the effect of solid loading at 40 °C. A CRC level of 12.5% (w/v) via fed-batch SSF resulted in the highest ethanol concentrations of 38.23 g/L. Thereafter, bioethanol production via fed-batch SSF with 12.5% (w/v) CRC was performed in 5-L bioreactor. The maximum ethanol concentration and ethanol productivity values were 31.96 g/L and 0.222 g/L/h, respectively. The thermotolerant S. cerevisiae TC-5 is promising yeast for bioethanol production under elevated temperatures via SSF and the use of second-generation substrates.

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Ethanol production from sugarcane bagasse by fed‐batch simultaneous saccharification and fermentation at high solids loading

Cited by 32 publications

References 31 publications

Bagassosis: A Case Report on Rare Hypersensitivity Pneumonitis

Bagassosis: A Case Report on Rare Hypersensitivity Pneumonitis

Enhanced co-generation of cellulosic ethanol and methane with the starch/sugar-rich waste mixtures and Tween 80 in fed-batch mode

Bioethanol Production from Cellulose-Rich Corncob Residue by the Thermotolerant Saccharomyces cerevisiae TC-5

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