Effect of steam-pretreatment combined with hydrogen peroxide on lignocellulosic agricultural wastes for bioethanol production: Analysis of derived sugars and other by-products

Verardi, Alessandra; Blasi, Alessandro; Marino, Tiziana; Molino, Antonio; Calabrò, Vincenza

doi:10.1016/j.jechem.2017.11.007

Cited by 49 publications

(14 citation statements)

References 39 publications

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“…Results showed that steam explosion at 220 • C for 10 min generates the maximum enzymatic hydrolysis yield. However, under harsh steam explosion conditions, the production of inhibitors such as aromatic compounds and dehydration byproducts (weak acids and furan derivatives) influenced the subsequent hydrolysis process (Vivekanand et al, 2013;Sun Y. G. et al, 2015;Verardi et al, 2018). Similar results were also observed when corn stover was pretreated with steam explosion at 140-220 • C for biogas production.…”

Section: Steam Explosionsupporting

confidence: 55%

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

et al. 2018

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Lignocellulosic biomass (LCB) is the most abundantly available bioresource amounting to about a global yield of up to 1. 3 billion tons per year. The hydrolysis of LCB results in the release of various reducing sugars which are highly valued in the production of biofuels such as bioethanol and biogas, various organic acids, phenols, and aldehydes. The majority of LCB is composed of biological polymers such as cellulose, hemicellulose, and lignin, which are strongly associated with each other by covalent and hydrogen bonds thus forming a highly recalcitrant structure. The presence of lignin renders the bio-polymeric structure highly resistant to solubilization thereby inhibiting the hydrolysis of cellulose and hemicellulose which presents a significant challenge for the isolation of the respective bio-polymeric components. This has led to extensive research in the development of various pretreatment techniques utilizing various physical, chemical, physicochemical, and biological approaches which are specifically tailored toward the source biomaterial and its application. The objective of this review is to discuss the various pretreatment strategies currently in use and provide an overview of their utilization for the isolation of high-value bio-polymeric components. The article further discusses the advantages and disadvantages of the various pretreatment methodologies as well as addresses the role of various key factors that are likely to have a significant impact on the pretreatment and digestibility of LCB.

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Section: Steam Explosionsupporting

confidence: 55%

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

et al. 2018

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“…In this method, chipped biomass is treated with high-pressure saturated steam at a desired temperature, which initiates the process of autohydrolysis [6,7]. The autohydrolysis enhances the hydrolysis of hemicelluloses by means of hydrolysis of acetyl groups, which are included in heterogeneous polysaccharides, and by breaking the linkages between hemicellulose and cellulose [8]. When the pressure is suddenly reduced to atmospheric pressure, the material undergoes an explosive breakdown due to moisture evaporation and gas volume expansion [9].…”

Section: Introductionmentioning

confidence: 99%

The Efficiency of Nitrogen and Flue Gas as Operating Gases in Explosive Decompression Pretreatment

2018

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As the pretreatment process is the most expensive and energy-consuming step in the overall second generation bioethanol production process, it is vital that it is studied and optimized in order to be able to develop the most efficient production process. The aim of this paper was to investigate chemical and physical changes in biomass during the process of applying the explosive decompression pretreatment method using two different gases-N 2 and synthetic flue gas. The explosive decompression method is economically and environmentally attractive since no chemicals are used-rather it is pressure that is applied-and water is used to break down the biomass structure. Both pre-treatment methods were used at different temperatures. To be able to compare the effects of the pretreatment, samples from different process steps were gathered together and analysed. The results were used to assess the efficiency of the pretreatment, the chemical and physical changes in the biomass and, finally, the mass balances were compiled for the process during the different process steps of bioethanol production. The results showed that both pre-treatment methods are effective in hemicellulose dissolution, while the cellulose content decreases to a smaller degree. The high glucose and ethanol yields were gained with both explosive pretreatment methods at 175 • C (15.2-16.0 g glucose and 5.6-9.0 g ethanol per 100 g of dry biomass, respectively).

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“…High sugar yield is also indispensable for the economic production of lowcost lignocellulosic fuels and chemicals (Verardi et al, 2018). Therefore, although conventional hydrothermal pretreatment with hot water is an easy process but it can dramatically increase the overall cost of the whole process in response to the degradation of reducing sugars during the pretreatment, unfermentable oligomer output, and the high quantity of costly enzymes required to achieve satisfactory results from hydrothermal pretreated biomass (de Oliveira Santos et al, 2018;Wang et al, 2018;Yang et al, 2018).…”

Section: Concluding Remarks and Future Prospectsmentioning

confidence: 99%

Pretreatment methods for lignocellulosic biofuels production: current advances, challenges and future prospects

et al. 2020

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Keywords:Lignocellulosic biomass has been recognized as promising feedstock for biofuels production. However, the high cost of pretreatment is one of the major challenges hindering large-scale production of biofuels from these abundant, indigenouslyavailable, and economic feedstock. In addition to high capital and operation cost, high water consumption is also regarded as a challenge unfavorably affecting the pretreatment performance. In the present review, advances in lignocellulose pretreatment technologies for biofuels production are reviewed and critically discussed. Moreover, the challenges faced and future research needs are addressed especially in optimization of operating parameters and assessment of total cost of biofuel production from lignocellulose biomass at large scale by using different pretreatment methods. Such information would pave the way for industrial-scale lignocellulosic biofuels production. Overall, it is important to ensure that throughout lignocellulosic bioethanol production processes, favorable features such as maximal energy saving, waste recycling, wastewater recycling, recovery of materials, and biorefinery approach are considered.

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Effect of steam-pretreatment combined with hydrogen peroxide on lignocellulosic agricultural wastes for bioethanol production: Analysis of derived sugars and other by-products

Cited by 49 publications

References 39 publications

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

The Efficiency of Nitrogen and Flue Gas as Operating Gases in Explosive Decompression Pretreatment

Pretreatment methods for lignocellulosic biofuels production: current advances, challenges and future prospects

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