Enhanced digestibility and fermentability of sugarcane bagasse in biofuel production by surfactant-assisted dilute acid pretreatment

2021 ◽  
Vol 172 ◽  
pp. 114006
Author(s):  
Meishan Fan ◽  
Chenbiao Zhao ◽  
Xinyu Huang ◽  
Hongdan Zhang ◽  
Jun Xie
Keyword(s):  
Sugarcane Bagasse ◽  
Dilute Acid Pretreatment ◽  
Biofuel Production ◽  
Dilute Acid ◽  
Acid Pretreatment ◽  
Surfactant Assisted

scholarly journals Effect of Subsequent Dilute Acid and Enzymatic Hydrolysis on Reducing Sugar Production from Sugarcane Bagasse and Spent Citronella Biomass

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Robinson Timung ◽  
Narendra Naik Deshavath ◽  
Vaibhav V. Goud ◽  
Venkata V. Dasu
Keyword(s):  
Enzymatic Hydrolysis ◽  
Sugarcane Bagasse ◽  
Crystallinity Index ◽  
Sem Analysis ◽  
Reducing Sugar ◽  
Dilute Acid Pretreatment ◽  
Crystalline Cellulose ◽  
Dilute Acid ◽  
Acid Pretreatment ◽  
Hydrolysis Of

This work was aimed at investigating the effect of process parameters on dilute acid pretreatment and enzymatic hydrolysis of spent citronella biomass (after citronella oil extraction) and sugarcane bagasse on total reducing sugar (TRS) yield. In acid pretreatment, the parameters studied were acid concentration, temperature, and time. At the optimized condition (0.1 M H2SO4, 120°C, and 120 min), maximum TRS obtained was 452.27 mg·g−1and 487.50 mg·g−1for bagasse and citronella, respectively. Enzymatic hydrolysis of the pretreated biomass usingTrichoderma reesei26291 showed maximum TRS yield of 226.99 mg·g−1for citronella and 282.85 mg·g−1for bagasse at 10 FPU, 50°C, and 48 hr. The maximum crystallinity index (CI) of bagasse and citronella after acid pretreatment obtained from X-ray diffraction analysis was 64.41% and 56.18%, respectively. Decreased CI after enzymatic hydrolysis process to 37.28% and 34.16% for bagasse and citronella, respectively, revealed effective conversion of crystalline cellulose to glucose. SEM analysis of the untreated and treated biomass revealed significant hydrolysis of holocellulose and disruption of lignin.

Techno-economic assessment of bioenergy and biofuel production in integrated sugarcane biorefinery: Identification of technological bottlenecks and economic feasibility of dilute acid pretreatment

Energy ◽  
2020 ◽  
Vol 199 ◽  
pp. 117422 ◽  
Author(s):  
Marcelo Holanda Vasconcelos ◽  
Fernanda Machado Mendes ◽  
Lucas Ramos ◽  
Marina Oliveira S. Dias ◽  
Antonio Bonomi ◽  
...  
Keyword(s):  
Economic Assessment ◽  
Economic Feasibility ◽  
Dilute Acid Pretreatment ◽  
Biofuel Production ◽  
Dilute Acid ◽  
Acid Pretreatment

scholarly journals Sono-Assisted Alkali and Dilute Acid Pretreatment of Phragmites karka (Tall Reed Grass) to Enhance Enzymatic Digestibility for Bioethanol Conversion

2021 ◽  
Vol 8 ◽  
Author(s):  
Sabeela Beevi Ummalyma ◽  
Dinabandhu Sahoo ◽  
Anoop Pudiyamadam ◽  
Velayudhanpillai Prasannakumari Adarsh ◽  
Rajeev K. Sukumaran ◽  
...  
Keyword(s):  
Reducing Sugar ◽  
Sugar Yield ◽  
Dilute Acid Pretreatment ◽  
Biofuel Production ◽  
Cellulose Content ◽  
Waste Biomass ◽  
Dilute Acid ◽  
Alkali Pretreatment ◽  
Acid Pretreatment ◽  
Phragmites Karka

Phragmites is the tallest energy crop found as an invasive species worldwide and considered as waste biomass. The present study evaluated the potential of the aquatic biomass Phragmites karka grown from two different lakes as feedstock for biofuel production. A comparative study of biomass was conducted from Chilika Lake and Loktak Lake, India. The methodology involves dilute acid, sono-assisted alkali pretreatment, and hydrolyzed biomass with commercial cellulase. SEM, XRD, and FTIR analysis were performed for the biomass physicochemical studies and confirmed that alterations occurred in the biomass structure, assisting the hydrolysis process. The enzymatic hydrolysis result showed that the highest of reducing sugar yield of 79% was obtained from biomass loading of 10% and 1% w/v alkali with a sonication frequency of 20 kHz for 25 min. Acid pretreatment released maximal reducing sugar yield of 73% attained from biomass loading of 20% and 0.5% w/v acid. Composition analysis of biomass showed that cellulose content increased from 36% to 46%. Sono-assisted alkali pretreatment solubilized 40% of lignin content compared to untreated biomass. Final ethanol recovery from the biomass is 78% fermentation efficiency from glucose. The data indicate that exploiting tall reed grass as a bioenergy raw material can be a viable approach for sustainable utilization of invasive grass/waste biomass for biorefineries, which helps control invasive weeds and management of waste.

scholarly journals Ultrasonically-Assisted Dissolution of Sugarcane Bagasse during Dilute Acid Pretreatment: Experiments and Kinetic Modeling

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5627
Author(s):  
Deslin Nadar ◽  
Kubendren Naicker ◽  
David Lokhat
Keyword(s):  
Reaction Time ◽  
Sugarcane Bagasse ◽  
Reaction Vessel ◽  
Dilute Acid Pretreatment ◽  
Dilute Acid ◽  
Acid Pretreatment ◽  
Reaction Conditions ◽  
Physicochemical Processes ◽  
Solids Loading ◽  
Mass Losses

Ultrasonic irradiation is known to enhance various physicochemical processes. In this work, the effect of ultrasound on the dissolution of sugarcane bagasse was studied, with the specific aims of quantifying the effect at low solids loading and mild reaction conditions, and determining whether the enhancement of dissolution by ultrasound is independent of temperature. The effects of agitation speed, reaction time, and sonication were examined on the dissolution of the biomass substrate at varying reaction temperatures during the pretreatment process. Sugarcane bagasse was mixed with a 0.3 M solution of sulfuric acid in a reaction vessel to undergo pretreatment. A kinetic model was applied to the mass dissolution of the biomass, as sonicated runs showed higher mass losses at each reaction time, compared to the non-sonicated runs. The ultrasonic enhancement in mass dissolution was seen to increase for an increase in the reaction time. It was observed that the induction period for the dissolution was eliminated by the application of ultrasound. Ultrasound was found to be more effective than temperature at enhancing mass dissolution at low solids loadings, and the effect of ultrasound was also found to be dependent on the temperature employed.

scholarly journals Enhanced Enzymatic Hydrolysis of Pennisetum alopecuroides by Dilute Acid, Alkaline and Ferric Chloride Pretreatments

Molecules ◽  
2019 ◽  
Vol 24 (9) ◽  
pp. 1715 ◽  
Author(s):  
Shangyuan Tang ◽  
Chunming Xu ◽  
Linh Tran Khanh Vu ◽  
Sicheng Liu ◽  
Peng Ye ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Ferric Chloride ◽  
Morphological Changes ◽  
Soluble Sugar ◽  
Dilute Acid Pretreatment ◽  
Biofuel Production ◽  
Dilute Acid ◽  
Acid Pretreatment ◽  
Total Soluble Sugar ◽  
Pennisetum Alopecuroides

In this study, effects of different pretreatment methods on the enzymatic digestibility of Pennisetum alopecuroides, a ubiquitous wild grass in China, were investigated to evaluate its potential as a feedstock for biofuel production. The stalk samples were separately pretreated with H2SO4, NaOH and FeCl3 solutions of different concentrations at 120 °C for 30 min, after which enzymatic hydrolysis was conducted to measure the digestibility of pretreated samples. Results demonstrated that different pretreatments were effective at removing hemicellulose, among which ferric chloride pretreatment (FCP) gave the highest soluble sugar recovery (200.2 mg/g raw stalk) from the pretreatment stage. In comparison with FCP and dilute acid pretreatment (DAP), dilute alkaline pretreatment (DALP) induced much higher delignification and stronger morphological changes of the biomass, making it more accessible to hydrolysis enzymes. As a result, DALP using 1.2% NaOH showed the highest total soluble sugar yield through the whole process from pretreatment to enzymatic hydrolysis (508.5 mg/g raw stalk). The present work indicates that DALP and FCP have the potential to enhance the effective bioconversion of lignocellulosic biomass like P. alopecuroides, hence making this material a valuable and promising energy plant.

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