Multidisciplinary Pretreatment Approaches to Improve the Bio-methane Production from Lignocellulosic Biomass

Yadav, Monika; Balan, Venkatesh; Varjani, Sunita; Tyagi, Vinay Kumar; Chaudhary, Gaurav; Pareek, Nidhi; Vivekanand, Vivekanand

doi:10.1007/s12155-022-10489-z

Cited by 16 publications

(6 citation statements)

References 117 publications

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“…According to previous reports, the cellulose and hemicellulose contained in AD feedstocks must be hydrolyzed to small sugars such as glucose, xylose, mannose, and galactose. These sugars can then be used as carbon sources for methanogenesis in the final stage of anaerobic digestion on biomethane production ( Gomes et al, 2022 ; Soltaninejad et al, 2022 ; Thongbunrod and Chaiprasert, 2023 ; Yadav et al, 2023 ).…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, Napier grass, which is classified as lignocellulosic biomass, has cellulose, hemicellulose, and lignin as its main organic components. This lignocellulosic biomass can be used as a feedstock for biogas production, potentially combined with food waste in the AD system ( Donkor et al, 2022 ; Govarthanan et al, 2022 ; Yadav et al, 2023 ). Napier grass, a perennial C-4 grass species indigenous to Africa, has been cultivated in numerous tropical regions, including various countries in Southeast Asia for ruminant feed.…”

Section: Introductionmentioning

confidence: 99%

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Co-digestion approach for enhancement of biogas production by mixture of untreated napier grass and industrial hydrolyzed food waste

Kriswantoro,

Pan,

Chu

2024

Front. Bioeng. Biotechnol.

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The co-digestion of untreated Napier grass (NG) and industrial hydrolyzed food waste (FW) was carried out in the batch reactor to investigate the effect of substrate ratios on biogas production performance. Two-stage anaerobic digestion was performed with an initial substrate concentration of 5 g VSadded/L and a Food to Microorganism Ratio (F/M) of 0.84. The 1:1 ratio of the NG and FW showed the optimum performances on biogas production yield with a value of 1,161.33 mL/g VSadded after 60 days of digestion. This was followed by the data on methane yield and concentration were 614.37 mL/g VSadded and 67.29%, respectively. The results were similar to the simulation results using a modified Gompertz model, which had a higher potential methane production and maximum production rate, as well as a shorter lag phase and a coefficient of determination of 0.9945. These findings indicated that the co-digestion of Napier grass and hydrolyzed food waste can enhance biogas production in two-stage anaerobic digestion.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Co-digestion approach for enhancement of biogas production by mixture of untreated napier grass and industrial hydrolyzed food waste

Kriswantoro,

Pan,

Chu

2024

Front. Bioeng. Biotechnol.

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“…Various treatment methods are available, including physical techniques (such as mechanical shearing, pyrolysis, and microwave), physio-chemical approaches (such as ammonia fiber explosion, steam explosion, carbon dioxide explosion, and hot water), and chemical treatments (such as acid, alkaline, and organosolvents). However, these methods often involve the use of harsh chemicals or require sophisticated instruments, ultimately adding to the process's cost [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Unleashing the Ligno-Hemicellulolytic Enzyme Potential of Pyrenophora phaeocomes S-1: A Solid State Fermentation Approach for Efficient Delignification of Corn Stover

Rastogi¹,

Soni²,

Sharma³

et al. 2023

Preprint

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Biological pretreatment of lignocellulosic residues has the potential to serve as a sustainable, less energy-intensive alternative to harsh chemical treatments for enhancing cellulose accessibility, despite the requirement of a lengthy incubation period. The study characterized the simultaneous delignification of corn stover by the white-rot fungus Pyrenophora phaeocomes S-1, as well as the co-production of a ligno-hemicellulolytic enzyme cocktail consisting of laccase, xylanase, and mannanase. The maximum yields of all three components of the cocktail were achieved after just 4 days of incubation under solid-state conditions. Following a 40-day fermentation period, we achieved a cellulose recovery of 44.25 ± 1.72%, attributed to the activities of 133.88 U/gds of laccase, 14.93 U/gds of xylanase, and 1.34 U/gds of mannanase co-produced by the fungus in the medium. Subsequently, through the extraction of biologically treated biomass with 0.5N NaOH after 40 days, the cellulose recovery increased to 66.4 ± 1.39%. Enzymatic hydrolysis of the same, employing only 5 FPU/gds of in-house produced cellulases, resulted in the liberation of 397.84 mg/gds of total reducing sugars after 144h. The findings of this study encourage further optimization of biological pretreatment of lignocellulosic residues and enzymatic hydrolysis to enhance the yields of total reducing sugars for their valorization.

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“…The highly condensed lignin is hard to break and will consume much higher energy to convert them into valuable products. Anaerobic digestion (AD) is a mature technology for organic waste treatment and has been widely used for biogas production using native and pretreated cellulosic raw materials such as straws, wood chips, energy plants, and municipal solid waste in recent years [19]. The enzymes produced by anaerobic microorganisms can especially break down the lignin-carbohydrate complex (LCC), particularly from recalcitrant biomass [20], making the carbohydrate available to be metabolized.…”

Section: Introductionmentioning

confidence: 99%

Isolation of Lignin from Anaerobically Digested Unhydrolyzed Solids Produced in a Biorefinery

et al. 2022

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About 30–40% of lignin-rich unhydrolyzed solids (UHS) are left behind after subjecting lignocellulosic biomass to thermochemical pretreated processes followed by enzymatic hydrolysis (EH) to produce sugars that are fermented to fuels and chemicals in a biorefinery. Ammonia Fiber Expansion (AFEX) is one of the leading alkaline pretreatment processes that use volatile ammonia that can be recovered and reused beneficially for the environment. In this work, we used AFEX-EH-UHS which are produced after subjecting corn stover to AFEX followed by EH and contain carbohydrates, ashes, and other impurities that are detrimental to the conversion of lignin to high-value products. In the study, we discovered that ~80% of the carbohydrates present in AFEX-EH-UHS were hydrolyzed and consumed during the AD process. The resulting solids, hereafter called AD-UHS, were subjected to lignin extraction using different combinations of solvents under reflux conditions. The solvent-extracted lignin was subjected to thermogravimetry, nuclear magnetic resonance (NMR) spectroscopy, and molecular weight analysis. Among the solvents, acetic acid could produce 95% pure lignin with some chemical modification, while aqueous ethanol was able to produce 80% pure lignin without any chemical modification.

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Multidisciplinary Pretreatment Approaches to Improve the Bio-methane Production from Lignocellulosic Biomass

Cited by 16 publications

References 117 publications

Co-digestion approach for enhancement of biogas production by mixture of untreated napier grass and industrial hydrolyzed food waste

Co-digestion approach for enhancement of biogas production by mixture of untreated napier grass and industrial hydrolyzed food waste

Unleashing the Ligno-Hemicellulolytic Enzyme Potential of Pyrenophora phaeocomes S-1: A Solid State Fermentation Approach for Efficient Delignification of Corn Stover

Isolation of Lignin from Anaerobically Digested Unhydrolyzed Solids Produced in a Biorefinery

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