Cellulosic-derived bioethanol from Limnocharis flava utilizing alkaline pretreatment

Mejica, Glennise Faye C.; Unpaprom, Yuwalee; Whangchai, Kanda; Ramaraj, Rameshprabu

doi:10.1007/s13399-020-01218-7

Cited by 31 publications

(10 citation statements)

References 21 publications

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“…For lignin separation, the hydrolysate solution containing the lignin extract was diluted with less concentration of H 2 O 2 . Mejica et al [37] stated that during the alkaline pretreatment process, the substrate primarily undergoes the crumbling of lignocellulosic structure, cellulose and hemicellulose dissolution, and saponification of ester intermolecular bonds, destroying the chemical bond of hemicellulose and other chemical compounds, resulting in lignocellulosic substrate delignification. Furthermore, the intensity of cross-linking polymers was altered, resulting in variations in the porosity, surface range, and crystallinity of the treated biomass.…”

Section: Biomass Digestibility Under Variousmentioning

confidence: 99%

Steam Explosion Pretreatment with Different Concentrations of Hydrogen Peroxide along with Citric Acid: A Former Step towards Bioethanol Production

Shukla

Kumar

Girdhar

et al. 2023

International Journal of Energy Research

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The present paper focuses on the utilization of the steam explosion method for efficient pretreatment of rice straw, used as a prominent substrate for bioethanol production. Native rice straw contains abundant chemical compounds in the form of cellulose, hemicellulose, and lignin 32.4%, 57%, and 12.5%, respectively. Pretreatment with different concentrations of H2O2 (0.05%, 0.1%, 0.25%, 0.5%, 0.75%, and 1%) was used as efficient impregnating agents at an optimum temperature of 121°C at 130 kPa pressure. After pretreatment, cellulosic content increases up to 54.5% while there was a reduction in the hemicellulose and lignin content up to 46.5% and 6.7%, respectively. The morphological changes were analyzed both before and after pretreatment using FTIR, TGA, and XRD. The reducing sugar estimation was carried out using DNS reagent and the absorbance was measured using a UV spectrophotometer at 540 cm-1 wavelength. Estimated results show a reducing sugar yield of 220.05 g/l from 0.05% ( v / v ) H2O2 pretreated sample and 273.21 g/l from sample, pretreated with H2O2, citric acid in the ratio of 1 : 1 with the same previous concentration. The XRD data shows enhancement of cellulose accessibility upon pretreatment to 13.3% and thereafter reduction with an increase in the concentration of H2O2. While pretreatment with H2O2 combined with citric acid in 1 : 1 ratio shows enhanced accessibility of 19.6% than untreated rice straw. This work mainly focuses on the core objective of an efficient pretreatment method for sustainable bioethanol production through a novel approach to the production of fermentable sugar.

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Section: Biomass Digestibility Under Variousmentioning

confidence: 99%

Steam Explosion Pretreatment with Different Concentrations of Hydrogen Peroxide along with Citric Acid: A Former Step towards Bioethanol Production

Shukla

Kumar

Girdhar

et al. 2023

International Journal of Energy Research

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“…First, agricultural wastes are composed of four components that differ in their average composition: cellulose, extractives, hemicellulose and lignin (Mejica et al, 2022). It is important to accurately characterize the beginning biomass to determine the products' yields and characteristics (Ramaraj et al, 2021).…”

Section: Feedstock Characteristicsmentioning

confidence: 99%

Influence of nanoparticles inclusion on the production of bioethanol from corn stalks and leaves

Saetang¹,

Tipnee²

2022

Maejo Int. J. Energ. Environ. Comm. or MIJEEC

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Bioethanol is a viable alternative to petroleum-derived fossil fuels. It is renewable, low-cost, and the preferred fuel for most developing countries worldwide. Although it is possible to make bioethanol from corn stalks and leaves wastes, second-generation biofuels made from agricultural waste feedstocks represent a significant step forward. In the present research, nickel oxide (NiO) nanoparticles (NPs) were used as a biocatalyst to achieve maximum ethanol output. The pretreatment of 2% NaOH with NiO NPs, 15-min autoclave condition, showed the highest total and reducing sugar yield was 162.69 g/L and 43.75 g/L. After hydrolysis, the suitable total and reducing sugar yield of 185.43 g/L and 125.42 g/L was chosen for further fermentation with the expansion of Saccharomyces cerevisiae cells. Separate hydrolysis and fermentation (SHF) using corn stalk and leaf waste was significantly assisted by incorporating a nanocatalyst; ethanol concentration was increased to 15.8 g/L at 24 hours incubation period. The study revealed critical information regarding ways NiO NPs could be employed to improve the efficiency of the ethanol production bioprocess.

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“…Included are the use of lignocellulosic resources such as crop residues and lignocellulosic crops. The phrase 2 nd generation is used loosely in the scientific literature to refer to feedstocks, conversion pathways, and products (Mejica et al, 2021;Trejo et al, 2021). Lignocellulosic biomass appears to be an appealing alternative for inexhaustible biofuel supplies, reducing reliance on fossil fuel resources (Ramaraj et al, 2015;Manmai et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Transformation of lignocellulose from corn stove for bioethanol production

Manmai

Unpaprom

et al. 2021

Maejo Int. J. Energ. Environ. Comm. or MIJEEC

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The use of fossil fuels, as well as the environmental issues associated with their burning, has pushed for the development of clean, renewable energy sources. Biofuels made from lignocellulosic biomass are considered a carbon-neutral and sustainable method. As the demand for non-petroleum fuels grows, more attention will be placed on developing a cost-competitive liquid transportation biofuel like ethanol. This study was conducted to produce bioethanol utilizing the SHF (separate hydrolysis and fermentation) technique from corn stove lignocellulose. Pretreatment with sodium hydroxide at various concentrations was also studied. The influence of enzymatic saccharification, fermentation time, and substrate concentration on sugar yield and, eventually, ethanol production was investigated. Fermentation was carried out by using the enzymatically saccharified hydrolysate and monoculture of Saccharomyces cerevisiae. The results reveal that pretreatment with 2% NaOH followed by 48 hours of hydrolysis produced the maximum bioethanol production (30.21 ±0.13 g/L). This study findings indicated that alkali-pretreated corn stove might be used as a feedstock for bioethanol production, reducing reliance on fossil fuels.

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Cellulosic-derived bioethanol from Limnocharis flava utilizing alkaline pretreatment

Cited by 31 publications

References 21 publications

Steam Explosion Pretreatment with Different Concentrations of Hydrogen Peroxide along with Citric Acid: A Former Step towards Bioethanol Production

Steam Explosion Pretreatment with Different Concentrations of Hydrogen Peroxide along with Citric Acid: A Former Step towards Bioethanol Production

Influence of nanoparticles inclusion on the production of bioethanol from corn stalks and leaves

Transformation of lignocellulose from corn stove for bioethanol production

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