scholarly journals Water-Soluble Sugars of Pedigreed Sorghum Mutant Stalks and Their Recovery after Pretreatment

2020 ◽  
Vol 10 (16) ◽  
pp. 5472 ◽  
Author(s):  
Youjie Xu ◽  
Jun Li ◽  
Zhanguo Xin ◽  
Scott R. Bean ◽  
Michael Tilley ◽  
...  
Keyword(s):  
Lignocellulosic Biomass ◽  
Soluble Sugars ◽  
Water Soluble ◽  
Dilute Acid Pretreatment ◽  
Extractive Content ◽  
Dilute Acid ◽  
Acid Pretreatment ◽  
Processing Technologies ◽  
Hemicellulose Removal ◽  
Dilute Sulfuric Acid Pretreatment

Chemical composition of biomass, especially carbohydrate content, is a critical indicator of a biomass source’s potential for biofuel applications. This study characterized physico-chemical properties of stalks from 16 representative pedigreed sorghum mutant lines. The objectives of this study were to evaluate the recovery of sucrose and its hydrolysis products, glucose and fructose, during dilute sulfuric acid pretreatment at conditions typically used for lignocellulosic biomass, and to determine the relationship between water-extractive contents and sugar recovery after pretreatment. Dilute acid-pretreated sorghum stalks had enzymatic saccharification of >82.4% glucose yield for all treated samples with more than 82.3% cellulose recovery and 85% hemicellulose removal. A single-step, one-pot process was recommended for sorghum mutant stalks with low water-extractive content (<35%, w/w) to reduce processing cost and minimize wastewater disposal since the majority of sugars will be recovered after dilute acid pretreatment with minimal degradation products. However, for sorghum mutant stalks with high water-extractive content (>35%, w/w), a pre-washing step is beneficial to recover the water-soluble sugars before subjecting to the pretreatment process in order to avoid sugar losses during the pretreatment stage. Thus, different processing technologies should be applied to lignocellulosic biomass with various water-extractive contents and water-soluble sugar concentrations.

scholarly journals Elucidating the role of ferrous ion cocatalyst in enhancing dilute acid pretreatment of lignocellulosic biomass

2011 ◽  
Vol 4 (1) ◽  
pp. 48 ◽  
Author(s):  
Hui Wei ◽  
Bryon S Donohoe ◽  
Todd B Vinzant ◽  
Peter N Ciesielski ◽  
Wei Wang ◽  
...  
Keyword(s):  
Lignocellulosic Biomass ◽  
Dilute Acid Pretreatment ◽  
Ferrous Ion ◽  
Dilute Acid ◽  
Acid Pretreatment

scholarly journals Enhanced Enzymatic Saccharification of Mixed Sawdust Wastes: Comparison of SPORL, Dilute Acid, Formic Acid, and Ethanol Organosolv Pretreatments

2021 ◽  
Vol 65 (3) ◽  
Author(s):  
Yuan Liang ◽  
Yanbo Yin ◽  
Haifeng Zhou ◽  
Yuanyu Tian
Keyword(s):  
Formic Acid ◽  
Enzymatic Saccharification ◽  
Fiber Surface ◽  
Dilute Acid Pretreatment ◽  
Dilute Acid ◽  
Acid Pretreatment ◽  
Glucose Yield ◽  
Hemicellulose Removal ◽  
Ethanol Pretreatment ◽  
Hydrolysis Of

Abstract. Utilization of the huge quantity of sawdust wastes is urgent. In this study, SPORL, dilute acid pretreatment (DA), formic acid pretreatment (FA), ethanol pretreatment (EtOH/H2O), and sulfuric acid catalyzed ethanol pretreatment (EtOH/H2O/H2SO4), on improving enzymatic hydrolysis of mixed sawdust wastes were comprehensively compared. EtOH/H2O/H2SO4 was the most effective pretreatment in lignin removal from sawdust fiber cell wall, while FA was much more effective in hemicellulose removal. After the pretreatments, the crystallinity of cellulose increased because of the removal of amorphous hemicellulose and lignin. Moreover, the fiber surface became coarse and porous, especially after EtOH/H2O/H2SO4, the structure was destroyed into fragments, which enhanced the cellulase accessibility of cellulose. Therefore, the glucose yield of EtOH/H2O/H2SO4 pretreated substrate was highest among these five pretreatments, achieved at 91.4% with a cellulase loading of only 10 FPU/g glucan.   Resumen. Es urgente aprovechar la gran cantidad de residuos de aserrín. En este estudio, SPORL, pretratamiento con ácido diluido (DA), pretratamiento con ácido fórmico (FA), pretratamiento con etanol (EtOH/H2O) y pretratamiento con etanol catalizado con ácido sulfúrico (EtOH/H2O/H2SO4), sobre la mejora de la hidrólisis enzimática de residuos de aserrín mezclado fueron comparados de manera integral. EtOH/H2O/H2SO4 fue el pretratamiento más eficaz para eliminar la lignina de la pared celular de la fibra de aserrín, mientras que el FA fue mucho más eficaz para eliminar la hemicelulosa. Después de los pretratamientos, la cristalinidad de la celulosa aumentó debido a la eliminación de hemicelulosa amorfa y lignina. Además, la superficie de la fibra se volvió gruesa y porosa, especialmente después de EtOH/H2O/H2SO4, la estructura se destruyó en fragmentos, lo que mejoró la accesibilidad de celulasa de la celulosa. Por lo tanto, el rendimiento de glucosa del sustrato pretratado con EtOH/H2O/H2SO4 fue el más alto entre estos cinco pretratamientos, alcanzado al 91,4% con una carga de celulasa de solo 10 FPU / g de glucano.

Research on Pretreatment Process and Product Detection in Enzymatic Hydrolysis of Lignocellulosic Biomass

2012 ◽  
Vol 503-504 ◽  
pp. 190-193
Author(s):  
Jing Jing Zhao ◽  
Hai Yan Yang ◽  
Bo Li ◽  
Fu Ming Chen
Keyword(s):  
Weight Loss ◽  
Enzymatic Hydrolysis ◽  
Lignocellulosic Biomass ◽  
Dilute Acid Pretreatment ◽  
Dilute Acid ◽  
Acid Pretreatment ◽  
Positive Correlation ◽  
Hydrolysis Yield ◽  
First Time ◽  
Hydrolysis Of

Sulfite pretreatment was explored in enzymatic hydrolysis of bagasse for the first time, and was compared with dilute acid pretreatment. The results showed that enzymatic hydrolysis yield of bagasse after sulfite treatment was lower than that of the bagasse pretreated with dilute acid. Meanwhile, complexity of sulfite pretreatment and its high cost made it infeasible for industrialized production. Results also showed positive correlation of bagasse pretreatment weight loss to enzymatic hydrolysis yield in dilute acid pretreatment processes, which made substrate weight loss a plausible parameter in pretreatment evaluation.

Bacteria-enhanced dilute acid pretreatment of lignocellulosic biomass

2017 ◽  
Vol 245 ◽  
pp. 419-425 ◽  
Author(s):  
Xu Yan ◽  
Zhongren Wang ◽  
Kejing Zhang ◽  
Mengying Si ◽  
Mingren Liu ◽  
...  
Keyword(s):  
Lignocellulosic Biomass ◽  
Dilute Acid Pretreatment ◽  
Dilute Acid ◽  
Acid Pretreatment

scholarly journals One-step peracetic acid pretreatment of hardwood and softwood biomass for platform chemicals production

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chandan Kundu ◽  
Shanthi Priya Samudrala ◽  
Mahmud Arman Kibria ◽  
Sankar Bhattacharya
Keyword(s):  
Lignocellulosic Biomass ◽  
Peracetic Acid ◽  
Crystallinity Index ◽  
Cost Effective ◽  
Renewable Resource ◽  
Dilute Acid Pretreatment ◽  
Dilute Acid ◽  
Acid Pretreatment ◽  
Platform Chemicals ◽  
Effective Removal

AbstractLignocellulosic biomass is an attractive renewable resource to produce biofuel or platform chemicals. Efficient and cost-effective conversion systems of lignocellulosic biomass depend on their appropriate pretreatment processes. Alkali or dilute acid pretreatment of biomass requires a high temperature (> 150 °C) to remove xylan (hemicellulosic sugar) and lignin partially. In this study, peracetic acid was used to pretreat biomass feedstocks, including hardwood and softwood species. It was found that the thermally-assisted dilute acid pretreatment of biomass conducted under the mild temperature of 90 °C up to 5 h resulted in the effective removal of lignin from the biomass with a negligible loss of carbohydrates. This thermally-assisted pretreatment achieved 90% of delignification, and this result was compared with the microwave-assisted pretreatment method. In addition, the crystallinity index (CrI), surface morphology, and chemical structure were significantly changed after the acid pretreatment. The biomass digestibility increased significantly with increased reaction time, by 32% and 23% for hardwood and softwood, respectively. From this study, it is clear that peracetic acid pretreatment is an effective method to enrich glucan content in biomass by delignification.

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