Recent insight into anaerobic digestion of lignocellulosic biomass for cost effective bioenergy generation

Eswari, A. Parvathy; R, Yukesh Kannah; Kavitha, S.; Banu, J. Rajesh

doi:10.1016/j.prime.2023.100119

Cited by 11 publications

(4 citation statements)

References 100 publications

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“…Dilute acid pretreatment has received wide attention due to its cost-effective, nontoxicity, lower degradation products, corrosive, and hazardous processes that do not require as much corrosion-resistant equipment, making it easier to scale-up the operation process [107][108][109]. Alkaline pretreatment leads to the delignification of agricultural biomass by cleaving the intermolecular ester linkages between hemicelluloses and lignin fragments, increases the amorphous surface area of the cellulose as well as the porosity of the biomass, reduces the degree and crystallinity of the polymerization rate at low temperature and pressure, resulting in an enhanced hydrolysis and fermentation yield and a high amount of sugars [110][111][112].…”

Section: Ethanol Synthesis Based On Lignocellulosic Materialsmentioning

confidence: 99%

Recent Advances in the Technologies and Catalytic Processes of Ethanol Production

et al. 2023

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On the basis of its properties, ethanol has been identified as the most used biofuel because of its remarkable contribution in reducing emissions of carbon dioxide which are the source of greenhouse gas and prompt climate change or global warming worldwide. The use of ethanol as a new source of biofuel reduces the dependence on conventional gasoline, thus showing a decreasing pattern of production every year. This article contains an updated overview of recent developments in the new technologies and operations in ethanol production, such as the hydration of ethylene, biomass residue, lignocellulosic materials, fermentation, electrochemical reduction, dimethyl ether, reverse water gas shift, and catalytic hydrogenation reaction. An improvement in the catalytic hydrogenation of CO2 into ethanol needs extensive research to address the properties that need modification, such as physical, catalytic, and chemical upgrading. Overall, this assessment provides basic suggestions for improving ethanol synthesis as a source of renewable energy in the future.

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Section: Ethanol Synthesis Based On Lignocellulosic Materialsmentioning

confidence: 99%

Recent Advances in the Technologies and Catalytic Processes of Ethanol Production

et al. 2023

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“…Interestingly, despite the increment in G m and R m , the ultrasoundpretreated PS showed a longer λ compared to raw PS, regardless of the E d . This may be attributed to the release of inhibiting compounds formed during the degradation of lignin and hemicellulose due to ultrasounds, which likely lowered the AD performance in the first few days of observation [54]. Overall, the increment in methane production after ultrasounds pretreatment can be attributed to the weakness of the bonds among the three main components of PS, i.e., cellulose, hemicellulose, and lignin, therefore resulting in easier biodegradation of the substrate [55].…”

Section: Ps (Orgmentioning

confidence: 99%

Impact of Chemical and Physical Pretreatment on Methane Potential of Peanut Shells

et al. 2023

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The request for alternative sources of energy has led to evaluating untapped routes for energy production, such as using abundant and low-cost waste materials, e.g., lignocellulosic wastes, as the substrate for biological processes aimed at biofuel production. This study focused on peanut shells (PS) valorisation via anaerobic digestion (AD). Two emerging pretreatments, i.e., organosolv and ultrasounds, were investigated to unlock the full AD potential of PS. The impact of a substrate-to-solvent ratio in organosolv pretreatment was investigated (i.e., 1:5 vs. 1:10 vs. 1:20). Different exposure times were tested for ultrasound pretreatment, corresponding to applied energy densities of 30,000, 12,000, and 6000 kJ/kg VS, respectively. Organosolv pretreatment achieved the maximal polyphenol solubilisation, i.e., 4.90 mg/g TS, when increasing the substrate-to-solvent ratio, whereas methane production did not benefit from the pretreatment, being comparable with that of raw PS at most (i.e., 55.0 mL CH4/g VS). On the other hand, ultrasounds mainly affected sugar solubilisation (up to 37.90 mg/g TS), enhancing methane production up to an extra 64%, achieved with the highest energy density. The organosolv route would benefit from further downstream steps to recover the biomolecules released in the liquid fraction, whereas ultrasounds pretreatment provided a slurry suitable for direct AD.

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“…9,10 However, another problem still exists in relation to the high lignin content that should be removed as it hampers the commercialization of energy products. 11–13 As such, microalgae, which does not contain lignin, are available as a source of potentially affordable raw material for bioethanol with a fairly fast growth rate and are even able to grow on critical land, waste, and peat water. 14–16…”

Section: Introductionmentioning

confidence: 99%

Mechanism and kinetic model of microalgal enzymatic hydrolysis for prospective bioethanol conversion

et al. 2023

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Recent insight into anaerobic digestion of lignocellulosic biomass for cost effective bioenergy generation

Cited by 11 publications

References 100 publications

Recent Advances in the Technologies and Catalytic Processes of Ethanol Production

Recent Advances in the Technologies and Catalytic Processes of Ethanol Production

Impact of Chemical and Physical Pretreatment on Methane Potential of Peanut Shells

Mechanism and kinetic model of microalgal enzymatic hydrolysis for prospective bioethanol conversion

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