Optimization of deep eutectic solvent pretreatment for bioethanol production from Napier grass

Panakkal, Elizabeth Jayex; Cheenkachorn, Kraipat; Chuetor, Santi; Tantayotai, Prapakorn; Raina, Neelu; Cheng, Yu‐Shen; Sriariyanun, Malinee

doi:10.1016/j.seta.2022.102856

Cited by 15 publications

(5 citation statements)

References 64 publications

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“…These peaks were observed in both the untreated and pretreated biomass; however, their intensities were reduced in the pretreated Napier grass. Another peak at 1034 cm −1 is attributed to the C-OH bending in hemicellulose [31,32]. Overall, the FT-IR analysis confirms that the oxalic acid pretreatment resulted in delignification, exposing more cellulose for hydrolysis.…”

Section: Ftir Analysismentioning

confidence: 84%

“…In Figure 5, the broad peak between 3000 and 3500 cm −1 corresponds to the O-H stretching vibrations of hydrogen bonds associated with cellulose [30]. The peak around 1627 cm −1 indicates the presence of C=C and C=O bonds in the aromatic rings of lignin [31] (Figure 5). These peaks were observed in both the untreated and pretreated biomass; however, their intensities were reduced in the pretreated Napier grass.…”

Section: Ftir Analysismentioning

confidence: 99%

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Oxalic Acid Pretreatment on Enhancement of Enzymatic Saccharification from Napier Grass for Biofuel Production

Panyarachun,

Panakkal,

Tawai

et al. 2023

E3S Web Conf.

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Thailand as an agricultural country faces significant challenges in managing the abundant biomass waste generated from agricultural activities. Conventional disposal methods such as incineration contribute to pollution and limited availability of landfill space. To mitigate these issues valorization of this biomass waste has been a solution. This study focuses on the utilization of Napier grass as a renewable energy source. In this experiment, the Napier grass samples were pretreated using oxalic acid with temperature variations (50 – 100 °C), time (30 180 min), and oxalic acid concentration (2 10%w/v) to determine the limit of these three factors for optimization studies. The utilization of Box-Behnken Design (BBD) within Response Surface Methodology (RSM) enabled the determination of optimal pretreatment conditions and the exploration of the correlation between pretreatment factors and reducing sugar content. The model predicted pretreatment with an oxalic acid concentration of 6% w/v, pretreated at 100 °C for 105 min as the optimal pretreatment condition to produce a maximum reducing sugar concentration of 10.65 mg/ml. Therefore, the sample was pretreated at optimum conditions and the results revealed the amount of reducing sugar obtained was 10.67 mg/ml, which differed from the predicted value with an error of 0.22%. Thus, this study provides insight for future researchers on the optimum condition that can be applied for pretreating biomass with oxalic acid to maximize the sugar yield.

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Section: Ftir Analysismentioning

confidence: 84%

Section: Ftir Analysismentioning

confidence: 99%

Oxalic Acid Pretreatment on Enhancement of Enzymatic Saccharification from Napier Grass for Biofuel Production

Panyarachun,

Panakkal,

Tawai

et al. 2023

E3S Web Conf.

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“…The liquid fraction was separated by filtration with Whatman No. 1 filter paper and further taken to analyze the reducing sugar using high-performance liquid chromatography (HPLC) [15].…”

Section: Enzymatic Hydrolysismentioning

confidence: 99%

“…ChCl/LA in a ratio of 1:10 has reported the high recovered lignin (72.3%) for pretreated masson pine [14]. A glucose yield of 87.09% was achieved by ChCl/LA (1:4) pretreatment for Napier grass [15]. Moreover, ChCl as HBD was also investigated to pretreat Bambara groundnut haulm by combining with various HBA, namely acetic acid, formic acid, LA, glycerol, and urea.…”

Section: Introductionmentioning

confidence: 99%

Process Optimization of Deep Eutectic Solvent Pretreatment of Coffee Husk Biomass

Areeya,

Gundupalli,

Dharmalingam

et al. 2023

E3S Web Conf.

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The increased processing of coffee beans has generated huge amount of coffee husk, which are improperly disposed. Inappropriate disposal of coffee husk has led to release of toxic compounds to the environment causing serious environmental concerns. To mitigate the impact of improperly disposed coffee husk, it is suggested for valorisation of the coffee husk. Hence, this study has focussed on identifying the potential of coffee husk in maximizing the sugar yield from it which can be converted to value added product. Deep eutectic solvent (DES) involving choline chloride and lactic acid (ChCl:LA) mixed at 1:4 molar ratio was studied to investigate the effect of DES pretreatment on coffee husk to produce reducing sugar in the hydrolysis process. Pretreatment conditions of the biomass were optimized for biomass loading (5-20%, w/w), temperature (70-120 °C), and duration (60-240 min) using Response Surface Methodology (RSM) for obtaining maximum yield of reducing sugar. The RSM model predicted an optimal pretreatment condition of biomass loading with 20% (w/w), pretreated at 120 °C for 231.80 min to achieve maximum sugar yield (30.522%). The pretreatment effect on biomass composition was analyzed using the Van Soest method, which showed an increase in the cellulose content along with the hemicellulose removal when compared with the native biomass. Moreover, evaluation of chemical structural changes also confirmed the effectiveness of DES pretreatment. Thus, the current study would illustrate the potential of coffee husk to produce value-added compounds from it.

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“…Considering the high content of hemicellulose and cellulose in the analysed samples (about 30–50% of the total composition), A. lappa biomass can be used as a potential source of glucose to be applied as a substrate to produce bioethanol as well as for the synthesis of new chemical compounds [ 17 , 18 , 19 , 20 , 21 ]. Generally, this conversion is carried out by the hydrolysis of complex carbohydrates (hemicellulose and cellulose), through mechanical and/or chemical treatments with concentrated acids (HCl, H 2 SO 4 ) [ 22 , 23 , 24 ], alkaline solutions [ 25 , 26 ] and ionic liquids [ 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

A Network of Processes for Biorefining Burdock Seeds and Roots

di Bitonto,

Scelsi,

Errico

et al. 2024

Molecules

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In this work, a novel sustainable approach was proposed for the integral valorisation of Arctium lappa (burdock) seeds and roots. Firstly, a preliminary recovery of bioactive compounds, including unsaturated fatty acids, was performed. Then, simple sugars (i.e., fructose and sucrose) and phenolic compounds were extracted by using compressed fluids (supercritical CO2 and propane). Consequently, a complete characterisation of raw biomass and extraction residues was carried out to determine the starting chemical composition in terms of residual lipids, proteins, hemicellulose, cellulose, lignin, and ash content. Subsequently, three alternative ways to utilise extraction residues were proposed and successfully tested: (i) enzymatic hydrolysis operated by Cellulases (Thricoderma resei) of raw and residual biomass to glucose, (ii) direct ethanolysis to produce ethyl levulinate; and (iii) pyrolysis to obtain biochar to be used as supports for the synthesis of sulfonated magnetic iron-carbon catalysts (Fe-SMCC) to be applied in the dehydration of fructose for the synthesis of 5-hydroxymethylfurfural (5-HMF). The development of these advanced approaches enabled the full utilisation of this resource through the production of fine chemicals and value-added compounds in line with the principles of the circular economy.

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Optimization of deep eutectic solvent pretreatment for bioethanol production from Napier grass

Cited by 15 publications

References 64 publications

Oxalic Acid Pretreatment on Enhancement of Enzymatic Saccharification from Napier Grass for Biofuel Production

Oxalic Acid Pretreatment on Enhancement of Enzymatic Saccharification from Napier Grass for Biofuel Production

Process Optimization of Deep Eutectic Solvent Pretreatment of Coffee Husk Biomass

A Network of Processes for Biorefining Burdock Seeds and Roots

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