Hydrogen peroxide pretreatment efficiently assisting enzymatic hydrolysis of chitosan at high concentration for chitooligosaccharides

2019 ◽  
Vol 164 ◽  
pp. 177-186 ◽  
Author(s):  
Meng Li ◽  
Jiang Han ◽  
Yong Xue ◽  
Yanfei Dai ◽  
Jian Liu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Enzymatic Hydrolysis ◽  
High Concentration ◽  
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.

Investigation of Alkaline Hydrogen Peroxide in Aqueous Organic Solvent to Enhance Enzymatic Hydrolysis of Rice Straw

2020 ◽  
Author(s):  
Jaruwan Damaurai ◽  
Thanchanok Preechakun ◽  
Marisa Raita ◽  
Verawat Champreda ◽  
Navadol Laosiripojana
Keyword(s):  
Hydrogen Peroxide ◽  
Enzymatic Hydrolysis ◽  
Organic Solvent ◽  
Rice Straw ◽  
Alkaline Hydrogen Peroxide ◽  
Hydrolysis Of

Ethanol production from enzymatic hydrolysis of sugarcane bagasse pretreated with lime and alkaline hydrogen peroxide

2011 ◽  
Vol 35 (7) ◽  
pp. 2600-2607 ◽  
Author(s):  
S.C. Rabelo ◽  
N.A. Amezquita Fonseca ◽  
R.R. Andrade ◽  
R. Maciel Filho ◽  
A.C. Costa
Keyword(s):  
Hydrogen Peroxide ◽  
Enzymatic Hydrolysis ◽  
Ethanol Production ◽  
Sugarcane Bagasse ◽  
Alkaline Hydrogen Peroxide ◽  
Hydrolysis Of

Heat pretreatment improves the enzymatic hydrolysis of granular corn starch at high concentration

2018 ◽  
Vol 64 ◽  
pp. 193-199 ◽  
Author(s):  
Haocun Kong ◽  
Xue Yang ◽  
Zhengbiao Gu ◽  
Zhaofeng Li ◽  
Li Cheng ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Corn Starch ◽  
High Concentration ◽  
Heat Pretreatment ◽  
Hydrolysis Of
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