An effective chemical pretreatment method for lignocellulosic biomass with substituted imidazoles

2014 ◽  
Vol 31 (1) ◽  
pp. 25-34 ◽  
Author(s):  
Yuzhi Kang ◽  
Matthew J. Realff ◽  
Minjeong Sohn ◽  
Jay H. Lee ◽  
Andreas S. Bommarius
Keyword(s):  
Lignocellulosic Biomass ◽  
Chemical Pretreatment ◽  
Pretreatment Method

scholarly journals Chemical Pretreatment-Independent Saccharifications of Xylan and Cellulose of Rice Straw by Bacterial Weak Lignin-Binding Xylanolytic and Cellulolytic Enzymes

2017 ◽  
Vol 83 (22) ◽  
Author(s):  
Thitiporn Teeravivattanakit ◽  
Sirilak Baramee ◽  
Paripok Phitsuwan ◽  
Somphit Sornyotha ◽  
Rattiya Waeonukul ◽  
...  
Keyword(s):  
Lignocellulosic Biomass ◽  
Rice Straw ◽  
Chemical Pretreatment ◽  
Environment Friendly ◽  
Glucose Yield ◽  
Content Type ◽  
Enzyme Pretreatment ◽  
One Step ◽  
Arabinoxylan Arabinofuranohydrolase ◽  
Xylanolytic Enzyme

ABSTRACT Complete utilization of carbohydrate fractions is one of the prerequisites for obtaining economically favorable lignocellulosic biomass conversion. This study shows that xylan in untreated rice straw was saccharified to xylose in one step without chemical pretreatment, yielding 58.2% of the theoretically maximum value by Paenibacillus curdlanolyticus B-6 PcAxy43A, a weak lignin-binding trifunctional xylanolytic enzyme, endoxylanase/β-xylosidase/arabinoxylan arabinofuranohydrolase. Moreover, xylose yield from untreated rice straw was enhanced to 78.9% by adding endoxylanases PcXyn10C and PcXyn11A from the same bacterium, resulting in improvement of cellulose accessibility to cellulolytic enzyme. After autoclaving the xylanolytic enzyme-treated rice straw, it was subjected to subsequent saccharification by a combination of the Clostridium thermocellum endoglucanase CtCel9R and Thermoanaerobacter brockii β-glucosidase TbCglT, yielding 88.5% of the maximum glucose yield, which was higher than the glucose yield obtained from ammonia-treated rice straw saccharification (59.6%). Moreover, this work presents a new environment-friendly xylanolytic enzyme pretreatment for beneficial hydrolysis of xylan in various agricultural residues, such as rice straw and corn hull. It not only could improve cellulose saccharification but also produced xylose, leading to an improvement of the overall fermentable sugar yields without chemical pretreatment. IMPORTANCE Ongoing research is focused on improving “green” pretreatment technologies in order to reduce energy demands and environmental impact and to develop an economically feasible biorefinery. The present study showed that PcAxy43A, a weak lignin-binding trifunctional xylanolytic enzyme, endoxylanase/β-xylosidase/arabinoxylan arabinofuranohydrolase from P. curdlanolyticus B-6, was capable of conversion of xylan in lignocellulosic biomass such as untreated rice straw to xylose in one step without chemical pretreatment. It demonstrates efficient synergism with endoxylanases PcXyn10C and PcXyn11A to depolymerize xylan in untreated rice straw and enhanced the xylose production and improved cellulose hydrolysis. Therefore, it can be considered an enzymatic pretreatment. Furthermore, the studies here show that glucose yield released from steam- and xylanolytic enzyme-treated rice straw by the combination of CtCel9R and TbCglT was higher than the glucose yield obtained from ammonia-treated rice straw saccharification. This work presents a novel environment-friendly xylanolytic enzyme pretreatment not only as a green pretreatment but also as an economically feasible biorefinery method.

scholarly journals Microwave Assisted Chemical Pretreatment Method for Bio-ethanol Production from Rice Straw

2017 ◽  
Vol 29 (5) ◽  
pp. 943-950 ◽  
Author(s):  
Renu Singh ◽  
Monika Srivastava ◽  
Bharti Rohatgi ◽  
Abhijit Kar ◽  
Ashish Shukla
Keyword(s):  
Ethanol Production ◽  
Rice Straw ◽  
Chemical Pretreatment ◽  
Pretreatment Method ◽  
Microwave Assisted

Study on lignin-free lignocellulosic biomass and PSF-PEG membrane compatibility

BioResources ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 1063-1075
Author(s):  
Abiodun A. Amusa ◽  
Abdul L. Ahmad ◽  
Jimoh K. Adewole
Keyword(s):  
Contact Angle ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Lignocellulosic Biomass ◽  
Biomedical Applications ◽  
Composite Membranes ◽  
Hydroxyl Groups ◽  
Chemical Pretreatment ◽  
Physical And Chemical ◽  
Porosity Measurements

Lignocellulosic biomass was delignified by combining physical and chemical pretreatment techniques. Then, a polysulfone-polyethylene glycol blend, which was compatible with the lignin-free biomass (0 wt% to 3.0 wt%), was used to fabricate composite membranes. The presence of hydroxyl groups after the pretreatment was evaluated via Fourier transform infrared spectroscopy. The rheology of the polymer solutions was assessed via the viscometric method. Also, the hydrophobicity of the fabricated membranes was determined using contact angle and porosity measurements. The fabricated membranes with near superhydrophobic properties (a contact angle of approximately 140°) based on this study revealed that contactor systems and biomedical applications would benefit from this modification.

Efficient Physical and Chemical Pretreatment of Lignocellulosic Biomass

2022 ◽  
pp. 123-139
Author(s):  
Liping Tan ◽  
Jian Zhao ◽  
Yinbo Qu
Keyword(s):  
Lignocellulosic Biomass ◽  
Chemical Pretreatment ◽  
Physical And Chemical

Importance of chemical pretreatment for bioconversion of lignocellulosic biomass

2014 ◽  
Vol 36 ◽  
pp. 91-106 ◽  
Author(s):  
Shuvashish Behera ◽  
Richa Arora ◽  
N. Nandhagopal ◽  
Sachin Kumar
Keyword(s):  
Lignocellulosic Biomass ◽  
Chemical Pretreatment

scholarly journals Greener Pretreatment Approaches for the Valorisation of Natural Fibre Biomass into Bioproducts

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2971
Author(s):  
Mohd Nor Faiz Norrrahim ◽  
Muhammad Roslim Muhammad Huzaifah ◽  
Mohammed Abdillah Ahmad Farid ◽  
Siti Shazra Shazleen ◽  
Muhammad Syukri Mohamad Misenan ◽  
...  
Keyword(s):  
Lignocellulosic Biomass ◽  
Natural Fibre ◽  
Natural Fibres ◽  
Advanced Technology ◽  
Chemical Pretreatment ◽  
Biological Pretreatment ◽  
Essential Requirement ◽  
Main Drawback ◽  
Recent Advances ◽  
Alternative Approach

The utilization of lignocellulosic biomass in various applications has a promising potential as advanced technology progresses due to its renowned advantages as cheap and abundant feedstock. The main drawback in the utilization of this type of biomass is the essential requirement for the pretreatment process. The most common pretreatment process applied is chemical pretreatment. However, it is a non-eco-friendly process. Therefore, this review aims to bring into light several greener pretreatment processes as an alternative approach for the current chemical pretreatment. The main processes for each physical and biological pretreatment process are reviewed and highlighted. Additionally, recent advances in the effect of different non-chemical pretreatment approaches for the natural fibres are also critically discussed with a focus on bioproducts conversion.

scholarly journals Combined biological and chemical pretreatment method for lignocellulosic ethanol production from energy cane

2013 ◽  
Vol 1 (1) ◽  
pp. 1 ◽  
Author(s):  
V. Sri Harjati Suhardi ◽  
Bijeta Prasai ◽  
David Samaha ◽  
Raj Boopathy
Keyword(s):  
Ethanol Production ◽  
Lignocellulosic Ethanol ◽  
Chemical Pretreatment ◽  
Pretreatment Method ◽  
Energy Cane

scholarly journals Methods of Ore Pretreatment for Comminution Energy Reduction

Minerals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 423 ◽  
Author(s):  
Sefiu O. Adewuyi ◽  
Hussin A. M. Ahmed ◽  
Haitham M. A. Ahmed
Keyword(s):  
Technological Development ◽  
Mining Industry ◽  
Pilot Scale ◽  
Energy Reduction ◽  
Chemical Pretreatment ◽  
Chemical Additive ◽  
Cement Production ◽  
Pretreatment Method ◽  
Ultrasonic Methods ◽  
Ore Pretreatment

The comminution of ores consumes a high portion of energy. Therefore, different pretreatment methods of ores prior to their comminution are considered to reduce this energy. However, the results of pretreatment methods and their technological development are scattered in literature. Hence, this paper aims at collating the different ore pretreatment methods with their applications and results from published articles, conference proceedings, and verified reports. It was found that pretreatment methods include thermal (via oven, microwave, or radiofrequency), chemical additive, electric, magnetic, ultrasonic, and bio-milling. Results showed that the chemical pretreatment method has been used at an industrial scale since 1930, mainly in cement production. The microwave pretreatment results showed positive improvements at pilot scale mining applications in 2017. The results of ore pretreatment using electric and ultrasonic methods showed up to 24% and 66% improvement in energy consumption, respectively. The former and the latter have been piloted for gold and carbonate ore, respectively. Findings also showed that magnetic, radiofrequency, and bio-milling methods have not led to significant reductions in comminution energy. Based on energy reduction, safety, costs, stage of application, and downstream benefits, microwave and electrical pretreatment methods may be focused for applications in the mining industry.

Hydrodynamic cavitation as an efficient pretreatment method for lignocellulosic biomass: A parametric study

2017 ◽  
Vol 235 ◽  
pp. 301-308 ◽  
Author(s):  
Ruly Terán Hilares ◽  
Gabriela Faria de Almeida ◽  
Muhammad Ajaz Ahmed ◽  
Felipe A.F. Antunes ◽  
Silvio Silvério da Silva ◽  
...  
Keyword(s):  
Lignocellulosic Biomass ◽  
Parametric Study ◽  
Hydrodynamic Cavitation ◽  
Pretreatment Method
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