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1. Combination of Superheated Steam Explosion and Alkaline Autoclaving Pretreatment for Improvement of Enzymatic Digestibility of the Oil Palm Tree Residues as Alternative Sugar Sources

Author:
Thamsee, Tanya; Choojit, Saovanee; Cheirsilp, Benjamas; Yamseangsung, Ram; Ruengpeerakul, Taweesak; Sangwichien, Chayanoot
Source:
Waste and biomass valorization 2019 v.10 no.10 pp. 3009-3023
ISSN:
1877-2641
Subject:
enzymatic hydrolysis; hydrolysis,   etc   ; Elaeis guineensis; autoclaves; autoclaving; cell walls; cellulose; crystal structure; ethanol production; fruits; glucose; hemicellulose; lignin; lignocellulose; plant residues; reducing sugars; scanning electron microscopy; sodium hydroxide;     Show all 18 Subjects
Abstract:
... Pretreatment processes play an important role in the conversion of lignocelluloses materials to reducing sugar for ethanol production. They help in breaking the structure of lignin and disrupt the crystalline structure of cellulose and hemicellulose, thus improving enzymatic accessibility during hydrolysis. In this study, various alternatives to pretreat oil palm empty fruit bunches (OPEFB), oil p ...
DOI:
10.1007/s12649-018-0292-z

2. Comparison of microwave-assisted zinc chloride hydrate and alkali pretreatments for enhancing eucalyptus enzymatic saccharification

Author:
Wei, Weiqi; Zhang, Hongdan; Jin, Yongcan
Source:
Energy conversion and management 2019 v.186 pp. 42-50
ISSN:
0196-8904
Subject:
enzymatic hydrolysis; hydrolysis,   etc   ; Eucalyptus; alkali treatment; cellulose; crystal structure; endo-1,4-beta-glucanase; energy conservation; feedstocks; glucose; heat; hemicellulose; lignin; microwave radiation; microwave treatment; polysorbates; saccharification; sodium hydroxide; zinc chloride;     Show all 19 Subjects
Abstract:
... In this work, four kinds of pretreatment methods including microwave-assisted ZnCl2·4H2O or NaOH pretreatment, traditional electrical heating ZnCl2·4H2O or NaOH pretreatment were developed and compared for eucalyptus hydrolysis at 100 °C. The effect of various pretreatment methods on hemicellulose and lignin degradation, and as well as subsequent pretreated solids enzymatic saccharification were c ...
DOI:
10.1016/j.enconman.2019.02.054

3. Effect of different ionic liquids and anti-solvents on dissolution and regeneration of Miscanthus towards bioethanol

Author:
Dash, Madhusmita; Mohanty, Kaustubha
Source:
Biomass and bioenergy 2019 v.124 pp. 33-42
ISSN:
0961-9534
Subject:
enzymatic hydrolysis,   etc   ; Miscanthus; anions; bioethanol; biomass; cations; cellulose; crystal structure; glucose; hemicellulose; hydrogen bonding; ionic liquids; lignin; sulfates;     Show all 14 Subjects
Abstract:
... The combined effect of anions of ionic liquids (IL) and anti-solvents on pre-treatment and dissolution mechanisms of biomass are not well studied. To reveal the above effect, three different ionic liquids composed with fixed cation ([EMIM]+) but varied anions were studied for Miscanthus dissolution. Results showed that [EMIM]+[Ac]– was very good in altering the cellulose structure and crystallinit ...
DOI:
10.1016/j.biombioe.2019.03.006

4. Effect of physicochemical pretreatments plus enzymatic hydrolysis on the composition and morphologic structure of corn straw

Author:
Wang, Ping; Liu, Chaoqi; Chang, Juan; Yin, Qingqiang; Huang, Weiwei; Liu, Yang; Dang, Xiaowei; Gao, Tianzeng; Lu, Fushan
Source:
Renewable energy 2019 v.138 pp. 502-508
ISSN:
0960-1481
Subject:
enzymatic hydrolysis,   etc   ; cellulose; corn straw; crystal structure; extrusion; hemicellulose; hydrogen peroxide; lignin; reducing sugars; renewable energy sources; scanning electron microscopes; sodium hydroxide; ultrasonics;     Show all 13 Subjects
Abstract:
... In order to decrease corn straw crystallinity for improving reducing sugar yield, physicochemical pretreatments plus enzymatic hydrolysis were investigated. The results showed that hemicellulose and lignin degradation rates in corn straw treated with physical method (ultrasound wave (group 12), extrusion + ultrasound wave (group 14), extrusion + ultrasound wave + microwave (group 15)) combined wit ...
DOI:
10.1016/j.renene.2019.01.118

5. Pretreatment of Eucalyptus urophylla in γ-valerolactone/dilute acid system for removal of non-cellulosic components and acceleration of enzymatic hydrolysis

Author:
Sun, Shao Ni; Chen, Xue; Tao, Ying Hua; Cao, Xue Fei; Li, Ming Fei; Wen, Jia Long; Nie, Shuang Xi; Sun, Run Cang
Source:
Industrial crops and products 2019 v.132 pp. 21-28
ISSN:
0926-6690
Subject:
enzymatic hydrolysis,   etc   ; Eucalyptus urophylla; biomass; cell walls; cellulose; chemical composition; crystal structure; feedstocks; glucose; hemicellulose; lignin; molecular weight; sulfuric acid; value added;     Show all 14 Subjects
Abstract:
... Enzymatic hydrolysis of biomass is highly dependent on the changes in chemical compositions and structural characteristics after pretreatment. γ-Valerolactone (GVL)/dilute acid pretreatment is an effective approach to remove hemicelluloses and lignin and disrupt the cell wall structure, leading to the improvement of enzymatic hydrolysis. This study examined the influence of chemical compositions a ...
DOI:
10.1016/j.indcrop.2019.02.004

6. Effects of hydrothermal treatment on enhancing enzymatic hydrolysis of rapeseed straw

Author:
Wang, Zhi-Wen; Zhu, Ming-Qiang; Li, Ming-Fei; Wei, Qin; Sun, Run-Cang
Source:
Renewable energy 2019 v.134 pp. 446-452
ISSN:
0960-1481
Subject:
enzymatic hydrolysis,   etc   ; byproducts; cellulose; cellulosic fibers; crystal structure; delignification; glucose; hemicellulose; hot water treatment; lignin; microstructure; rapeseed; renewable energy sources; saccharification; straw; temperature;     Show all 16 Subjects
Abstract:
... Rapeseed straw is an annually renewable low-cost crop by-product, and it was submitted to hydrothermal treatment at temperatures ranging from 145 to 205 °C for various retention times (15–120 min). The enzymatic hydrolysis was conducted at a substrate concentration of 2% and an enzyme addition of 115 mg/g substrate. Results showed that increased pretreatment severity gradually degraded and removed ...
DOI:
10.1016/j.renene.2018.11.019

7. Physical and chemical characteristics of pretreated slash pine sawdust influence its enzymatic hydrolysis

Author:
Kruyeniski, Julia; Ferreira, Paulo J.T.; Videira Sousa Carvalho, Maria da Graça; Vallejos, María E.; Felissia, Fernando E.; Area, María C.
Source:
Industrial crops and products 2019 v.130 pp. 528-536
ISSN:
0926-6690
Subject:
enzymatic hydrolysis,   etc   ; Pinus elliottii; X-ray diffraction; alkali treatment; biomass; cellulose; crystal structure; hemicellulose; lignin; lignin content; physicochemical properties; porosity; regression analysis; sawdust;     Show all 14 Subjects
Abstract:
... The aim of this work was to evaluate the effect of different pretreatments applied to industrial slash pine sawdust (Pinus elliottii) on its enzymatic hydrolysis. NREL laboratory analytical procedures for standard biomass analysis were used to characterize the thirty one fibrous materials produced. Eight pretreated materials were selected considering both the chemical composition and the enzymatic ...
DOI:
10.1016/j.indcrop.2018.12.075

8. Effective delignification and decrystallization of cauliflower wastes by using dilute phosphoric acid for efficient enzymatic digestibility to produce fermentable sugars

Author:
Majumdar, Sayari; Naha, Antara; Bhattacharyya, D.K.; Bhowal, Jayati
Source:
Biomass and bioenergy 2019 v.125 pp. 169-179
ISSN:
0961-9534
Subject:
enzymatic hydrolysis,   etc   ; X-ray diffraction; biomass; cauliflower; cellulose; cellulosic fibers; crystal structure; delignification; endo-1,4-beta-glucanase; feedstocks; hemicellulose; leaves; lignin; pH; phosphoric acid; porosity; reducing sugars; saccharification; scanning electron microscopy; temperature; wastes;     Show all 21 Subjects
Abstract:
... The present study investigated the feasibility of using cauliflower wastes (stalk and leaf) as novel feedstock for production of fermentable sugars, thus reducing the wastage. In this investigation cauliflower wastes were pretreated with dilute phosphoric acid (H3PO4) prior to enzymatic hydrolysis for better release of fermentable sugars. Maximum total reducing sugar yields were achieved at 121 °C ...
DOI:
10.1016/j.biombioe.2019.04.017