Comparison of ultrasound-assisted Fenton reaction and dilute acid-catalysed steam explosion pretreatment of corncobs: cellulose characteristics and enzymatic saccharification

RSC Advances ◽  
2016 ◽  
Vol 6 (80) ◽  
pp. 76848-76854 ◽  
Author(s):  
Sujun Wang ◽  
Xianhong Ouyang ◽  
Wenya Wang ◽  
Qipeng Yuan ◽  
Aixia Yan
Keyword(s):  
Steam Explosion ◽  
Fenton Reaction ◽  
Enzymatic Saccharification ◽  
Dilute Acid ◽  
Steam Explosion Pretreatment ◽  
Ultrasound Assisted

As an emerging method for lignocellulose pretreatment, the ultrasound-assisted Fenton reaction is not well developed in comparison to the dilute acid-catalysed steam explosion.

EVALUATION OF WASTE MUSHROOM MEDIUM AS A FERMENTABLE SUBSTRATE AND BIOETHANOL PRODUCTION

2012 ◽  
Vol 06 ◽  
pp. 745-750
Author(s):  
AI ASAKAWA ◽  
CHIZURU SASAKI ◽  
CHIKAKO ASADA ◽  
YOSHITOSHI NAKAMURA
Keyword(s):  
Steam Explosion ◽  
Lentinula Edodes ◽  
Simultaneous Saccharification And Fermentation ◽  
Ethanol Yield ◽  
Enzymatic Saccharification ◽  
Steam Pressure ◽  
Insoluble Residue ◽  
Steam Explosion Pretreatment ◽  
Simultaneous Saccharification ◽  
Waste Mushroom Medium

Waste Shiitake (Lentinula edodes) mushroom medium, a lignocellulosic aglicultural residue, was evaluated as a fermentable substrate. 87% of the fermentable sugars remained in the waste mushroom medium. The sugar yield of the waste mushroom medium (46.3%) was higher than that of raw mushroom medium (20.3%) after 48 h of enzymatic saccharification by Meicelase because L. edodes changed wood structure. These results indicated that the waste mushroom medium is a suitable substrate for fermentation. Next, the efficient ethanol production using steam explosion pretreatment was studied. After 30 h of simultaneous saccharification and fermentation (SSF) using Meicelase and Saccharomyces cerevisiae AM12, 20.0 g/L ethanol was produced from 100 g/L water-insoluble residue of the waste mushroom medium treated at a steam pressure of 20 atm and a steaming time of 5 min. This corresponded to an ethanol yield of 77.0% of the theoretical, i.e. 14.7 g of ethanol obtained from 100 g of waste mushroom medium.

scholarly journals A novel surfactant-assisted dilute phosphoric acid plus steam explosion pretreatment of poplar wood for fermentable sugar production

2021 ◽  
Author(s):  
Denghui Tong ◽  
Peng Zhan ◽  
Weifeng Zhang ◽  
Yongcai Zhou ◽  
Yilei Huang ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Residence Time ◽  
Steam Explosion ◽  
Biomass Conversion ◽  
Structural Characteristics ◽  
Enzymatic Saccharification ◽  
Sugar Production ◽  
Fermentable Sugar ◽  
Steam Explosion Pretreatment ◽  
Before And After

Abstract Pretreatment is an indispensable process in lignocellulosic bioethanol production. In this work, a surfactant agent JFC was introduced into the dilute phosphoric acid plus steam explosion pretreatment scheme for fermentable sugar production using poplar as substrate. Four crucial factors (phosphoric acid concentration, surfactant concentration, pressure, and residence time) affecting the pretreatment efficiency were optimized using the single factor tests. The optimal parameters obtained were as follows: 1:2.5 solid/liquid rate, 2 h pre-soaking time, 1.5 %(v/v) JFC-M + 2.0 wt% phosphoric acid, 2.0 MPa pressure, and 120 s residence time, resulting in a maximum cellulose recovery rate of 86.33 % and enzymatic saccharification rate of 84.62 %, which was 38.97 % higher than that of control. The morphological and structural characteristics of samples before and after pretreatment, were characterized by the scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) method. The addition of JFC-M was of a notable influence in overcoming biomass recalcitrance and boosting cellulose digestion, showing great application potentials in biomass conversion process.

Enhanced biomass delignification and enzymatic saccharification of canola straw by steam-explosion pretreatment

2013 ◽  
Vol 94 (8) ◽  
pp. 1607-1613 ◽  
Author(s):  
Amir Daraei Garmakhany ◽  
Mahdi Kashaninejad ◽  
Mehran Aalami ◽  
Yahya Maghsoudlou ◽  
Mortza Khomieri ◽  
...  
Keyword(s):  
Steam Explosion ◽  
Enzymatic Saccharification ◽  
Steam Explosion Pretreatment ◽  
Canola Straw

Evaluation of recalcitrant features impacting enzymatic saccharification of diverse agricultural residues treated by steam explosion and dilute acid

RSC Advances ◽  
2015 ◽  
Vol 5 (75) ◽  
pp. 60754-60762 ◽  
Author(s):  
Ruchi Gaur ◽  
Ruchi Agrawal ◽  
Rahul Kumar ◽  
E. Ramu ◽  
Veena Rani Bansal ◽  
...  
Keyword(s):  
Steam Explosion ◽  
Enzymatic Saccharification ◽  
Agricultural Residues ◽  
Biofuel Production ◽  
Dilute Acid ◽  
Agricultural Biomass

Exploring agricultural biomass for biofuel production necessitates pretreatment as a prerequisite step.

Effects of fungal pretreatment and steam explosion pretreatment on enzymatic saccharification of plant biomass

1995 ◽  
Vol 48 (6) ◽  
pp. 719-724 ◽  
Author(s):  
Tatsuro Sawada ◽  
Yoshitoshi Nakamura ◽  
Fumihisa Kobayashi ◽  
Masaaki Kuwahara ◽  
Takashi Watanabe
Keyword(s):  
Steam Explosion ◽  
Plant Biomass ◽  
Enzymatic Saccharification ◽  
Steam Explosion Pretreatment ◽  
Fungal Pretreatment

Steam explosion pretreatment and enzymatic saccharification of duckweed (Lemna minor) biomass

2015 ◽  
Vol 72 ◽  
pp. 206-215 ◽  
Author(s):  
X. Zhao ◽  
G.K. Moates ◽  
D.R. Wilson ◽  
R.J. Ghogare ◽  
M.J. Coleman ◽  
...  
Keyword(s):  
Steam Explosion ◽  
Lemna Minor ◽  
Enzymatic Saccharification ◽  
Steam Explosion Pretreatment

scholarly journals Evaluation of Mediterranean Agricultural Residues as a Potential Feedstock for the Production of Biogas via Anaerobic Fermentation

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Christos Nitsos ◽  
Leonidas Matsakas ◽  
Kostas Triantafyllidis ◽  
Ulrika Rova ◽  
Paul Christakopoulos
Keyword(s):  
Methane Production ◽  
Steam Explosion ◽  
Anaerobic Fermentation ◽  
Olive Tree ◽  
Agricultural Residues ◽  
Moderate Increase ◽  
Dilute Acid ◽  
Lignocellulosic Residues ◽  
Steam Explosion Pretreatment ◽  
Tree Pruning

Hydrothermal, dilute acid, and steam explosion pretreatment methods, were evaluated for their efficiency to improve the methane production yield of three Mediterranean agricultural lignocellulosic residues such as olive tree pruning, grapevine pruning, and almond shells. Hydrothermal and dilute acid pretreatments provided low to moderate increase in the digestibility of the biomass samples, whereas steam explosion enabled the highest methane yields to be achieved for almond shells at 232.2 ± 13.0 mL CH4/gVS and olive pruning at 315.4 ± 0.0 mL CH4/gVS. Introduction of an enzymatic prehydrolysis step moderately improved methane yields for hydrothermal and dilute acid pretreated samples but not for the steam exploded ones.

scholarly journals An extensive parameter study of hydrotropic extraction of steam-pretreated birch

2021 ◽  
Author(s):  
Johanna Olsson ◽  
Michael Persson ◽  
Mats Galbe ◽  
Ola Wallberg ◽  
Ann-Sofi Jönsson
Keyword(s):  
Residence Time ◽  
Steam Explosion ◽  
Room Temperature ◽  
Initial Step ◽  
Parameter Study ◽  
Hydrothermal Degradation ◽  
Steam Explosion Pretreatment ◽  
Lignin Extraction ◽  
Extraction Step ◽  
Lignin Recovery

AbstractEfficient fractionation of lignocellulosic biomass is an important step toward the replacement of fossil-based products. However, the utilisation of all of the components in biomass requires various fractionation techniques. One promising process configuration is to apply steam explosion for the recovery of hemicelluloses and a subsequent hydrotropic extraction step for the delignification of the remaining solids. In this work, the influence of residence time, temperature and biomass loading on lignin recovery from birch using sodium xylene sulphonate as a hydrotrope was investigated. Our results show that residence time, temperature and biomass loading correlate positively with lignin extraction, but the effects of these parameters were limited. Furthermore, when steam explosion was implemented as the initial step, hydrotropic extraction could be performed even at room temperature, yielding a lignin extraction of 50%. Also, hydrothermal degradation of the material was necessary for efficient delignification with sodium xylene sulphonate, regardless of whether it occurs during steam explosion pretreatment or is achieved at high temperatures during the hydrotropic extraction.

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