Pretreating lignocellulosic biomass by the concentrated phosphoric acid plus hydrogen peroxide (PHP) for enzymatic hydrolysis: Evaluating the pretreatment flexibility on feedstocks and particle sizes

2014 ◽  
Vol 166 ◽  
pp. 420-428 ◽  
Author(s):  
Qing Wang ◽  
Zhanghong Wang ◽  
Fei Shen ◽  
Jinguang Hu ◽  
Fubao Sun ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Enzymatic Hydrolysis ◽  
Phosphoric Acid ◽  
Lignocellulosic Biomass ◽  
Particle Sizes

scholarly journals Estimativa da produção de etanol a partir de biomassas lignocelulósicas pré-tratadas com peróxido de hidrogênio

2021 ◽  
Vol 4 (3) ◽  
pp. 72-83
Author(s):  
Leidiane de Paula ◽  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Hydrogen Peroxide ◽  
Experimental Design ◽  
Enzymatic Hydrolysis ◽  
Lignocellulosic Biomass ◽  
Second Generation ◽  
Elephant Grass ◽  
Peroxide Content ◽  
Cellic Ctec2 ◽  
Second Generation Ethanol

The objective of this work was to compare pre-treatments with hydrogen peroxide at 1 and 2% (v/v) and pH at 11.5 used in elephant-grass (EC), mulatto-grass (HD364) lignocellulosic biomass, bark of rice (CA) and leaves of the pineapple (AB) plant to estimate the production of second-generation ethanol (2G). The experimental design was completely randomized in a 4x2 factorial scheme with four replicates per treatment. Enzymatic hydrolysis was performed with the pretreated biomasses using Cellic/CTec2 enzyme. 7 ml of the hydrolyzed material and 0.14 g of non-isolated Saccharomyces cerevisiae yeast were used. After this dilution the material was taken to a styrofoam oven and measured at the temperature and volume of the gas produced at the time of 0,04; 0,08; 0,2; 0,63; 0,92; 1,19; 1,93; 2,19; 2,82; 3,15; 3,94 hours post-incubation. The results showed that the observed differences between the pretreatments influenced the yield in 2G ethanol differently between the biomasses, being the CE that presented the best yield, however, when evaluating the yield by the peroxide content within each biomass, both AB and EC showed no differences between pre-treatments. HD364 had better yield with 1% peroxide and CA with 2% peroxide.

scholarly journals Fates of hemicellulose, lignin and cellulose in concentrated phosphoric acid with hydrogen peroxide (PHP) pretreatment

RSC Advances ◽  
2018 ◽  
Vol 8 (23) ◽  
pp. 12714-12723 ◽  
Author(s):  
Qing Wang ◽  
Dong Tian ◽  
Jinguang Hu ◽  
Fei Shen ◽  
Gang Yang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Phosphoric Acid ◽  
Lignocellulosic Biomass

The transformation of cellulose, hemicellulose, and lignin in lignocellulosic biomass in a novel pretreatment are elucidated based on model fractions.

Recycling cellulases by pH-triggered adsorption-desorption during the enzymatic hydrolysis of lignocellulosic biomass

2014 ◽  
Vol 98 (12) ◽  
pp. 5765-5774 ◽  
Author(s):  
Yaping Shang ◽  
Rongxin Su ◽  
Renliang Huang ◽  
Yang Yang ◽  
Wei Qi ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Lignocellulosic Biomass ◽  
Adsorption Desorption ◽  
Hydrolysis Of

Large-scale enzymatic hydrolysis of agricultural lignocellulosic biomass. Part 1: Pretreatment procedures

1992 ◽  
Vol 42 (3) ◽  
pp. 197-204 ◽  
Author(s):  
M. Ropars ◽  
R. Marchal ◽  
J. Pourquié ◽  
J.P. Vandecasteele
Keyword(s):  
Enzymatic Hydrolysis ◽  
Lignocellulosic Biomass ◽  
Large Scale ◽  
Hydrolysis Of

Improving the efficiency of enzymatic hydrolysis of Eucalyptus residues with a modified aqueous ammonia soaking method

2018 ◽  
Vol 33 (2) ◽  
pp. 165-174 ◽  
Author(s):  
Dan Huo ◽  
Qiulin Yang ◽  
Guigan Fang ◽  
Qiujuan Liu ◽  
Chuanling Si ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Enzymatic Hydrolysis ◽  
Aqueous Ammonia ◽  
Pulp Mill ◽  
Fiber Surface ◽  
Raw Material ◽  
Sem Images ◽  
Aqueous Ammonia Soaking ◽  
Guaiacyl Lignin ◽  
Hydrolysis Of

Abstract Eucalyptus residues from pulp mill were pretreated with aqueous ammonia soaking (AAS) method to improve the efficiency of enzymatic hydrolysis. The optimized condition of AAS was obtained by response surface methodology. Meanwhile, hydrogen peroxide was introduced into the AAS system to modify the AAS pretreatment (AASP). The results showed that a fermentable sugar yield of 64.96 % was obtained when the eucalypt fibers were pretreated at the optimal conditions, with 80 % of ammonia (w/w) for 11 h and keeping the temperature at 90 °C. In further research it was found that the addition of H2O2 to the AAS could improve the pretreatment efficiency. The delignification rate and enzymatic digestibility were increased to 64.49 % and 73.85 %, respectively, with 5 % of hydrogen peroxide being used. FTIR analysis indicated that most syringyl and guaiacyl lignin and a trace amount of xylan were degraded and dissolved during the AAS and AASP pretreatments. The CrI of the raw material was increased after AAS and AASP pretreatments, which was attributed to the removal of amorphous portion. SEM images showed that microfibers were separated and explored from the initial fiber structure after AAS pretreatment, and the AASP method could improve the destructiveness of the fiber surface.

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