scholarly journals A Cation Study on Rice Husk Biomass Pretreatment with Aqueous Hydroxides: Cellulose Solubility Does Not Correlate with Improved Enzymatic Hydrolysis

2017 ◽  
Vol 5 (6) ◽  
pp. 5320-5329 ◽  
Author(s):  
Benjamin B. Y. Lau ◽  
Tracey Yeung ◽  
Robert J. Patterson ◽  
Leigh Aldous
Keyword(s):  
Enzymatic Hydrolysis ◽  
Rice Husk ◽  
Biomass Pretreatment

Pretreatment of rice husk in a pilot scale mill for further enzymatic hydrolysis

2016 ◽  
Vol 8 (3) ◽  
pp. 274-279 ◽  
Author(s):  
E. M. Podgorbunskikh ◽  
A. L. Bychkov ◽  
O. I. Lomovskii
Keyword(s):  
Enzymatic Hydrolysis ◽  
Rice Husk ◽  
Pilot Scale

scholarly journals EVALUATION OF ALKALINE PRETREATMENT ON THE ENZYMATIC HYDROLYSIS OF CARNAUBA STRAW RESIDUE

2019 ◽  
Vol 8 (3) ◽  
Author(s):  
Alan De Oliveira Campos ◽  
Francinaldo Leite Da Silva ◽  
Emilianny Rafaely Batista Magalhães ◽  
Gorete Ribeiro De Macedo ◽  
Everaldo Silvino Dos Santos
Keyword(s):  
Enzymatic Hydrolysis ◽  
Cellulosic Ethanol ◽  
Chemical Characterization ◽  
Crystallinity Index ◽  
Biomass Pretreatment ◽  
Cellulose Conversion ◽  
Hydrolysis Of ◽  
Potential Use ◽  
Second Generation Ethanol

Carnauba (Copernicia prunifera) straw residue generated from production of its wax is rich in cellulose, thus showing a potential use in the production of second generation ethanol. However, the high lignin and hemicellulose load associated with cellulose makes it difficult the enzymatic attack, thus having the need of an adequate pretreatment of this material. The objective of this study was to optimize the enzymatic hydrolysis of carnauba straw residue, focusing on the alkaline biomass pretreatment. Therefore, NaOH solutions at concentrations of 1.0% (w/v) (PA1), 2.0% (w/v) (PA2), 3.0% (w/v) (PA3) and 4.0% (w/v) (PA4) were used. The chemical and physical characterization of natural and pre-treated carnauba straw were according to the NREL, and DRX and FTIR performed analyzes. The materials chemical characterization showed that all the used pretreatments were able to remove a significant amount of lignin and hemicellulose, which can improve the enzymes access, favoring the increase of cellulose conversion. In relation to DRX analysis an increase in crystallinity index happens reaching up to 55.15% after the pretreatment PA4, which may be associated to the removal of hemicellulose and amorphous lignin, related to cellulose. After a period of 96 hours of enzymatic hydrolysis, the PA4 pretreated residue showed the best performance with a cellulosic conversion of 78%. Spite of a slightly lower performance of the residue that presented higher cellulose conversion, the pretreated material PA2 is an alternative to reduce costs in the cellulosic ethanol production.

scholarly journals Physicochemical Structural Changes of Poplar and Switchgrass during Biomass Pretreatment and Enzymatic Hydrolysis

2016 ◽  
Vol 4 (9) ◽  
pp. 4563-4572 ◽  
Author(s):  
Xianzhi Meng ◽  
Qining Sun ◽  
Matyas Kosa ◽  
Fang Huang ◽  
Yunqiao Pu ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Structural Changes ◽  
Biomass Pretreatment

scholarly journals Optimization of alkaline pretreatment and enzymatic hydrolysis for the extraction of xylooligosaccharide from rice husk

AMB Express ◽  
2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Nuntawat Khat-udomkiri ◽  
Bhagavathi Sundaram Sivamaruthi ◽  
Sasithorn Sirilun ◽  
Narissara Lailerd ◽  
Sartjin Peerajan ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Rice Husk ◽  
Alkaline Pretreatment

scholarly journals Microwave-assisted Enzymatic Hydrolysis to Produce Xylooligosaccharides from Rice Husk Alkali- soluble Arabinoxylan

2021 ◽  
Author(s):  
Wannaporn Klangpetch ◽  
Alisa Pattarapisitporn ◽  
Suphat Phongthai ◽  
Pannapapol Jaichakan
Keyword(s):  
Enzymatic Hydrolysis ◽  
Sodium Hydroxide ◽  
Microwave Heating ◽  
Rice Husk ◽  
Sugar Content ◽  
Microwave Treatment ◽  
Heating Process ◽  
Microwave Pretreatment ◽  
Microwave Assisted ◽  
Pretreatment Time

Abstract This study aimed to produce xylooligosaccharide (XOS) and arabino-xylooligosaccharide (AXOS) from rice husk (RH) using microwave treatment combined with enzymatic hydrolysis and evaluate their prebiotic properties. The RH was pretreated by a microwave heating process at 140, 160 and 180°C for 5, 10, and 15 min to obtain crude arabinoxylan (AX). The results emphasized that increasing microwave pretreatment time increased sugar content. The crude AX was then extracted with 2% (w/v) sodium hydroxide at 25°C for 24 h. The obtained AX was then used as a substrate for XOS production by commercial xylanases. The results showed that the oligosaccharide produced by Pentopan Mono BG and Ultraflo Max provided xylobiose and xylotriose as the main products. Interestingly, AXOS was also present in the oligosaccharide product. Furthermore, the oligosaccharides obtained were able to promote the growth of Lactobacillus spp. and to resist degradation more than 70% after exposure to simulated human digestion.

Lignin fate and characterization during ionic liquid biomass pretreatment for renewable chemicals and fuels production

2014 ◽  
Vol 16 (3) ◽  
pp. 1236-1247 ◽  
Author(s):  
Noppadon Sathitsuksanoh ◽  
Kevin M. Holtman ◽  
Daniel J. Yelle ◽  
Trevor Morgan ◽  
Vitalie Stavila ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Enzymatic Hydrolysis ◽  
Wheat Straw ◽  
Loblolly Pine ◽  
Biomass Pretreatment ◽  
Renewable Chemicals

The fate of lignin from wheat straw, Miscanthus, and Loblolly pine after pretreatment by a non-toxic and recyclable ionic liquid (IL), [C2mim][OAc], followed by enzymatic hydrolysis was investigated.

Differences in chemical composition and physical properties imprinted by industrial storage on sugarcane bagasse result in its efficient enzymatic hydrolysis

2021 ◽  
Author(s):  
Vanessa de Oliveira Arnoldi Pellegrini ◽  
Regiane P. Ratti ◽  
Jefferson G Filgueiras ◽  
Mauricio Falvo ◽  
Marisa A.L. Coral ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Enzymatic Hydrolysis ◽  
Physical Properties ◽  
Ethanol Production ◽  
Sugarcane Bagasse ◽  
Second Generation ◽  
Biomass Pretreatment ◽  
Fermentable Sugars ◽  
Industrial Storage ◽  
Second Generation Ethanol

Sugarcane bagasse (SCB) is a promising feedstock for second-generation ethanol production. Bioconversion of lignocellulose into fermentable sugars involve several technological steps, with biomass pretreatment being among the most expensive ones....

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