Assessing the potential of lignocellulosic energy crops as an alternative resource for bioethanol production using ultrasound assisted dilute acid pretreatment

Paramasivan, Sangeetha; Sankar, Shambhavi; Velavan, R.; Krishnakumar, Tharani; Batcha, Roshan Sithara Iqbal; Muthuvelu, Kirupa Sankar

doi:10.1016/j.matpr.2020.12.470

Cited by 11 publications

(8 citation statements)

References 41 publications

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“…The composition of biomass plays an important role in the pretreatment methods selection [56]. Musatto et al [57] reported that the sequential acid-alkali pretreatment technique was used in order to eliminate the protective lignin-hemicellulose wrapper of the EFBs.…”

Section: Physical Analysis Of Efbsmentioning

confidence: 99%

“…The acid pretreatment technique helps in the hydrolysis of hemicellulose fractions and lignin content reduction in biomass [60,61]. On the other hand, the alkaline pretreatment of lignocelluloses with NaOH can modify or remove lignin content in the feedstocks by fracturing the The composition of biomass plays an important role in the pretreatment methods selection [56]. Musatto et al [57] reported that the sequential acid-alkali pretreatment technique was used in order to eliminate the protective lignin-hemicellulose wrapper of the EFBs.…”

Section: Physical Analysis Of Efbsmentioning

confidence: 99%

“…It was reported that the pretreated lignocellulose, which has fractions of pores, was more accessible for enzymatic attack [32]. This is because pretreatment effectively degraded and exposed more surface area of fermentable sugars for the enzymatic hydrolysis process [56]. Pores present in the EFBs are also thought to be effective in the swelling of the EFBs' structure, thus attracting the enzymatic and microbe reactions for the bioconversion process [55,68].…”

Section: Scanning Electron Microscope (Sem) Analysis Of Efbsmentioning

confidence: 99%

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Simultaneous Saccharification and Fermentation of Empty Fruit Bunches of Palm for Bioethanol Production Using a Microbial Consortium of S. cerevisiae and T. harzianum

et al. 2022

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A simultaneous saccharification and fermentation (SSF) optimization process was carried out on pretreated empty fruit bunches (EFBs) by employing the Response Surface Methodology (RSM). EFBs were treated using sequential acid-alkali pretreatment and analyzed physically by a scanning electron microscope (SEM). The findings revealed that the pretreatment had changed the morphology and the EFBs’ structure. Then, the optimum combination of enzymes and microbes for bioethanol production was screened. Results showed that the combination of S. cerevisiae and T. harzianum and enzymes (cellulase and β-glucosidase) produced the highest bioethanol concentration with 11.76 g/L and a bioethanol yield of 0.29 g/g EFB using 4% (w/v) treated EFBs at 30 °C for 72 h. Next, the central composite design (CCD) of RSM was employed to optimize the SSF parameters of fermentation time, temperature, pH, and inoculum concentration for higher yield. The analysis of optimization by CCD predicted that 9.72 g/L of bioethanol (0.46 g/g ethanol yield, 90.63% conversion efficiency) could be obtained at 72 h, 30 °C, pH 4.8, and 6.79% (v/v) of inoculum concentration using 2% (w/v) treated EFBs. Results showed that the fermentation process conducted using the optimized conditions produced 9.65 g/L of bioethanol, 0.46 g/g ethanol yield, and 89.56% conversion efficiency, which was in close proximity to the predicted CCD model.

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Section: Physical Analysis Of Efbsmentioning

confidence: 99%

Section: Physical Analysis Of Efbsmentioning

confidence: 99%

Section: Scanning Electron Microscope (Sem) Analysis Of Efbsmentioning

confidence: 99%

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Simultaneous Saccharification and Fermentation of Empty Fruit Bunches of Palm for Bioethanol Production Using a Microbial Consortium of S. cerevisiae and T. harzianum

et al. 2022

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“…Several studies incorporating the acid and alkaline-mediated ultrasound pretreatment for increased biofuel yield have been reported. The application of ultrasound-assisted dilute acid pretreatment demonstrated that the combined method can eliminate the formation of inhibitors and increase the substrate utilization efficiency as well as bioethanol yield ( Paramasivan et al, 2021 ). Similarly, ultrasound-assisted alkaline pretreatment was performed to achieve a high sugar content, resulting in a considerable yield of glucose after enzymatic saccharification ( Ong et al, 2021 ).…”

Section: Current Technologies For the Pretreatment Of Lignocellulosicmentioning

confidence: 99%

A consolidated review of commercial-scale high-value products from lignocellulosic biomass

Zheng

Chen

et al. 2022

Front. Microbiol.

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For decades, lignocellulosic biomass has been introduced to the public as the most important raw material for the environmentally and economically sustainable production of high-valued bioproducts by microorganisms. However, due to the strong recalcitrant structure, the lignocellulosic materials have major limitations to obtain fermentable sugars for transformation into value-added products, e.g., bioethanol, biobutanol, biohydrogen, etc. In this review, we analyzed the recent trends in bioenergy production from pretreated lignocellulose, with special attention to the new strategies for overcoming pretreatment barriers. In addition, persistent challenges in developing for low-cost advanced processing technologies are also pointed out, illustrating new approaches to addressing the global energy crisis and climate change caused by the use of fossil fuels. The insights given in this study will enable a better understanding of current processes and facilitate further development on lignocellulosic bioenergy production.

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“…The pretreatment of these materials changes the physical-chemical structure of the lignocellulosic biomass and improves the hydrolysis rate [6]. Several processes have been developed for the treatment of lignocelluloses, including hot water [7], steam explosion [8], ultrasound-assisted with acid treatment [9], alkali treatment [10], and enzymatic treatment [11]. These processes enhance the availability of sugars by increasing porosity and changing the crystallinity, which is critical in the subsequent bioconversion process to ethanol.…”

Section: Introductionmentioning

confidence: 99%

Hydrolysis of Red Beet Bagasse and Modeling of Hydrolysates for Bioethanol Production

Jiménez-Islas

Ríos-Rivera

Sánchez

et al. 2021

Cien.Ing.Neogranadina

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Red beets in Mexico are used in the colorants industry, but their juice bagasse (RBB) can be carbohydrates for ethanol production. The present study aims to the pretreatment of bagasse of red beet using acid (H2SO4) and alkali (NaOH) to improve the availability of sugars. Also, describe quantitatively in the hydrolysates the microbial growth, substrate consumption, and ethanol production with simulation using data kinetics of red beet and logistic, Pirt, and Luedeking-Piret equations. Experiments with H2SO4 at sterilization conditions resulted in lower phenolic formation and increased hydrolysis to 32 %. Logistic, Pirt, and Luedeking-Piret equations were used to quantitatively describe the hydrolysates the microbial growth, substrate consumption, and ethanol production, respectively. In the alkali treatment, a significant mean difference was found (p < 0.05) in substrate mass and reaction time. The maximum yield of 38 g/L of total sugars at 72 h of reaction was obtained from 6 g RBB and H2SO4 at 0.5 N. The ethanol yield was 15 to 18 g/L representing about 78 to 92 % of the theoretical yield.

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Assessing the potential of lignocellulosic energy crops as an alternative resource for bioethanol production using ultrasound assisted dilute acid pretreatment

Cited by 11 publications

References 41 publications

Simultaneous Saccharification and Fermentation of Empty Fruit Bunches of Palm for Bioethanol Production Using a Microbial Consortium of S. cerevisiae and T. harzianum

Simultaneous Saccharification and Fermentation of Empty Fruit Bunches of Palm for Bioethanol Production Using a Microbial Consortium of S. cerevisiae and T. harzianum

A consolidated review of commercial-scale high-value products from lignocellulosic biomass

Hydrolysis of Red Beet Bagasse and Modeling of Hydrolysates for Bioethanol Production

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