scholarly journals Enzymatic Saccharification of Canola Straw and Oat Hull Subjected to Microwave-Assisted Alkali Pretreatment

2021 ◽  
Author(s):  
Obiora Samuel Agu ◽  
Lope G. Tabil ◽  
Tim Dumonceaux
Keyword(s):  
Alkali Treatment ◽  
Enzymatic Saccharification ◽  
Sem Analysis ◽  
Cellulolytic Enzyme ◽  
Hammer Mill ◽  
Alkali Pretreatment ◽  
Microwave Assisted ◽  
Alkali Solutions ◽  
Specific Barriers ◽  
Canola Straw

Pretreatment of lignocellulosic biomass is a critical step in removing substrate-specific barriers to the cellulolytic enzyme attack. The study compared the effectiveness of microwave-assisted alkali pretreatment and alkali treatment in the enzymatic saccharification of canola straw and oat hull. Microwave pretreatments were employed by immersing the biomass in dilute alkali solutions (NaOH and KOH) at concentrations of 0, 0.75, and 1.5% (w/v) for microwave-assisted heating times of 6, 12, and 18 min. Alkali treatments were carried out using the same procedure but by soaking and without microwave heating. The highest glucose yields after enzymatic saccharification of both canola straw and oat hull were obtained when these feedstocks were ground using 1.6 mm hammer mill screen size and subjected to microwave-assisted alkali pretreatment using 1.5% and 0.75% NaOH for 18 min, respectively. SEM analysis indicated a more significant modification in the structure of biomass samples subjected to microwave-assisted alkali pretreatment compared to untreated and alkali-treated biomass samples. Results indicated that microwave-assisted alkali pretreatment with short residence time is effective in improving the glucose yield of canola straw and oat hull during enzymatic saccharification.

scholarly journals Microwave-Assisted Alkali Pre-Treatment, Densification and Enzymatic Saccharification of Canola Straw and Oat Hull

2017 ◽  
Vol 4 (4) ◽  
pp. 25 ◽  
Author(s):  
Obiora Agu ◽  
Lope Tabil ◽  
Tim Dumonceaux
Keyword(s):  
Enzymatic Saccharification ◽  
Microwave Assisted ◽  
Pre Treatment ◽  
Canola Straw

scholarly journals Influence of Alkali Treatment on the Microstructure and Mechanical Properties of Coir and Abaca Fibers

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2636
Author(s):  
Petr Valášek ◽  
Miroslav Müller ◽  
Vladimír Šleger ◽  
Viktor Kolář ◽  
Monika Hromasová ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Alkali Treatment ◽  
Fiber Surface ◽  
Cellulose Fibers ◽  
Sem Analysis ◽  
Experimental Program ◽  
Time Interval ◽  
The European Union ◽  
Vegetable Fibers

Composite materials with natural fillers have been increasingly used as an alternative to synthetically produced materials. This trend is visible from a representation of polymeric composites with natural cellulose fibers in the automotive industry of the European Union. This trend is entirely logical, owing to a preference for renewable resources. The experimental program itself follows pronounced hypotheses and focuses on a description of the mechanical properties of untreated and alkali-treated natural vegetable fibers, coconut and abaca fibers. These fibers have great potential for use in composite materials. The results and discussion sections contribute to an introduction of an individual methodology for mechanical property assessment of cellulose fibers, and allows for a clear definition of an optimal process of alkalization dependent on the content of hemicellulose and lignin in vegetable fibers. The aim of this research was to investigate the influence of alkali treatment on the surface microstructure and tensile properties of coir and abaca fibers. These fibers were immersed into a 5% solution of NaOH at laboratory temperature for a time interval of 30 min, 1 h, 2 h, 3 h, 6 h, 12 h, 24 h, and 48 h, rinsed and dried. The fiber surface microstructures before and after the alkali treatment were evaluated by SEM (scanning electron microscopy). SEM analysis showed that the alkali treatment in the NaOH solution led to a gradual connective material removal from the fiber surface. The effect of the alkali is evident from the visible changes on the surface of the fibers.

scholarly journals Alkali treatment of fungal pretreated wheat straw for bioethanol production

Bioethanol ◽  
2016 ◽  
Vol 2 (1) ◽  
Author(s):  
María García-Torreiro ◽  
Miguel Álvarez Pallín ◽  
María López-Abelairas ◽  
Thelmo A. Lu-Chau ◽  
Juan M. Lema
Keyword(s):  
Wheat Straw ◽  
Alkali Treatment ◽  
Alkaline Treatment ◽  
White Rot ◽  
White Rot Fungus ◽  
Process Conditions ◽  
Alkali Pretreatment ◽  
Irpex Lacteus ◽  
C 30 ◽  
Pretreated Wheat Straw

AbstractBioconversion of lignocellulosic materials into ethanol requires an intermediate pretreatment step for conditioning biomass. Sugar yields from wheat straw were previously improved by the addition of a mild alkali pretreatment step before bioconversion by the white-rot fungus Irpex lacteus. In this work, an alternative alkaline treatment, which significantly reduces water consumption, was implemented and optimized. Sugar recovery increased 117% with respect to the previously developed alkaline wash process at optimal process conditions (30°C, 30 minutes and 35.7% (w/w) of NaOH). In order to further reduce operational costs, a system for alkali recycling was implemented. This resulted in the treatment of 150% more wheat straw using the same amount of NaOH. Finally, enzymatic hydrolysis was optimized and resulted in a reduction of enzyme dose of 33%.

Optimization of Microwave-assisted Alkali Pretreatment and Enzymatic Hydrolysis of Banana Pseudostem

2014 ◽  
Vol 36 (24) ◽  
pp. 2691-2698 ◽  
Author(s):  
S. Chittibabu ◽  
M. K. Saseetharan ◽  
M. R. Kalaivani ◽  
M. P. Rajesh
Keyword(s):  
Enzymatic Hydrolysis ◽  
Alkali Pretreatment ◽  
Microwave Assisted ◽  
Hydrolysis Of

scholarly journals Optimization of microwave‐assisted alkali pretreatment of cassava rhizome for enhanced enzymatic hydrolysis glucose yield

2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Sakaya Sombatpraiwan ◽  
Tiraporn Junyusen ◽  
Tawarat Treeamnak ◽  
Payungsak Junyusen
Keyword(s):  
Enzymatic Hydrolysis ◽  
Alkali Pretreatment ◽  
Glucose Yield ◽  
Microwave Assisted

Production and characterization of lignin and cellulose fractions obtained from pretreated vine shoots by microwave assisted alkali treatment

2019 ◽  
Vol 289 ◽  
pp. 121726 ◽  
Author(s):  
Izaskun Dávila ◽  
Javier Remón ◽  
Patricia Gullón ◽  
Jalel Labidi ◽  
Vitaliy Budarin
Keyword(s):  
Alkali Treatment ◽  
Microwave Assisted

Assessment of microwave-assisted alkali pretreatment for the production of sugars from banana fruit peel waste

Biofuels ◽  
2018 ◽  
Vol 10 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Garima Tiwari ◽  
Abhishek Sharma ◽  
Ashwani Kumar ◽  
Satyawati Sharma
Keyword(s):  
Banana Fruit ◽  
Alkali Pretreatment ◽  
Fruit Peel ◽  
Microwave Assisted

Short duration microwave assisted pretreatment enhances the enzymatic saccharification and fermentable sugar yield from sugarcane bagasse

2012 ◽  
Vol 37 (1) ◽  
pp. 109-116 ◽  
Author(s):  
Parameswaran Binod ◽  
Karri Satyanagalakshmi ◽  
Raveendran Sindhu ◽  
Kanakambaran Usha Janu ◽  
Rajeev K. Sukumaran ◽  
...  
Keyword(s):  
Short Duration ◽  
Sugarcane Bagasse ◽  
Enzymatic Saccharification ◽  
Sugar Yield ◽  
Fermentable Sugar ◽  
Microwave Assisted
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