Ethanol Production From Steam-Explosion Pretreated Wheat Straw

2006 ◽  
Vol 130 (1-3) ◽  
pp. 496-508 ◽  
Author(s):  
Ignacio Ballesteros ◽  
Ma José Negro ◽  
Jose Miguel Oliva ◽  
Araceli Cabanas ◽  
Paloma Manzanares ◽  
...  
Keyword(s):  
Ethanol Production ◽  
Wheat Straw ◽  
Steam Explosion ◽  
Pretreated Wheat Straw

Ethanol Production From Steam-Explosion Pretreated Wheat Straw

2007 ◽  
pp. 496-508 ◽  
Author(s):  
Ignacio Ballesteros ◽  
Ma José Negro ◽  
José Miguel Oliva ◽  
Araceli Cabañas ◽  
Paloma Manzanares ◽  
...  
Keyword(s):  
Ethanol Production ◽  
Wheat Straw ◽  
Steam Explosion ◽  
Pretreated Wheat Straw

Enhanced Saccharification of Biologically Pretreated Wheat Straw for Ethanol Production

2013 ◽  
Vol 169 (4) ◽  
pp. 1147-1159 ◽  
Author(s):  
M. López-Abelairas ◽  
T. A. Lu-Chau ◽  
J. M. Lema
Keyword(s):  
Ethanol Production ◽  
Wheat Straw ◽  
Pretreated Wheat Straw

Optimization of Process Parameters for Ethanol Production from Alkaline-Pretreated Wheat Straw by Fed-Batch Simultaneous Saccharification and Fermentation

2011 ◽  
Vol 236-238 ◽  
pp. 922-925
Author(s):  
Chun Chang ◽  
Gui Zhuan Xu ◽  
Xiao Jian Ma
Keyword(s):  
Ethanol Production ◽  
Wheat Straw ◽  
Simultaneous Saccharification And Fermentation ◽  
Ethanol Concentration ◽  
Raw Materials ◽  
Feeding Strategy ◽  
Tween 20 ◽  
Fed Batch ◽  
Pretreated Wheat Straw ◽  
Simultaneous Saccharification

The alkaline-pretreated wheat straw was used as raw materials, and the fed-batch simultaneous saccharification and fermentation (SSF) process for ethanol production with higher substrate loading (up to 16% (w/v)) was investigated. Firstly, the Fed-batch SSF with different feeding strategy was optimized. The highest ethanol concentration reached to 37.9 g/L with an initial substrate loading of 10% (w/v), and equal substrate addition (3%) at 8h and 16h respectively. Then the effects of Tween-20 were also investigated. The results showed that Tween-20 addition with 2.0 g/L can improved the ethanol production. Furthermore, a nonisothermal fed-batch SSF was proposed, and the ethanol concentration of 41.5 g/L, corresponds to 81.0 % of the theoretical yield was achieved within 72 h.

Binderless Particleboard from Steam Exploded Wheat Straw

2011 ◽  
Vol 179-180 ◽  
pp. 807-811 ◽  
Author(s):  
Peng Luo ◽  
Chuan Min Yang
Keyword(s):  
Water Absorption ◽  
Wheat Straw ◽  
Residence Time ◽  
Internal Bond ◽  
Steam Explosion ◽  
Raw Material ◽  
Modulus Of Rupture ◽  
Pretreatment Condition ◽  
Pretreatment Severity ◽  
Pretreated Wheat Straw

Wheat straw is one of the most abundant and cheap lignocellulosic waste materials in the world. Nowadays, field burning is the major practice for removing wheat straw due to lack of effective utilization, but it increases the air pollution and consequently affects public health. Wheat straw is an attractive lignocellulosic raw material for binderless particleboard production. In this study, steam explosion was adopted as pretreatment method for wheat straw. The pretreated wheat straw was used to produce binderless particleboard panels. The influence of both pretreatment temperature and residence time on chemical composition of wheat straw, and modulus of rupture, internal bond and water absorption of panel boards was investigated. The results showed that defiberation of wheat straw raw material occurred during steam explosion pretreatment. The modulus of rupture and internal bond increased while water absorption of panels decreased as pretreatment severity increased. The optimum pretreatment condition, with 19.8 MPa of modulus of rupture, 0.2572 MPa internal bond and 61.5% of water absorption of panels, occurred under 170°C temperature and 10 minute residence time.

scholarly journals Steam Explosion for Wheat Straw Pretreatment for Sugars Production

Bioethanol ◽  
2016 ◽  
Vol 2 (1) ◽  
Author(s):  
Pablo Alvira ◽  
María José Negro ◽  
Ignacio Ballesteros ◽  
Alberto González ◽  
Mercedes Ballesteros
Keyword(s):  
Enzymatic Hydrolysis ◽  
Wheat Straw ◽  
Steam Explosion ◽  
Large Scale ◽  
Degradation Products ◽  
Transport Sector ◽  
High Solids Loading ◽  
Hydrolysis Process ◽  
Pretreatment Conditions ◽  
Pretreated Wheat Straw

AbstractDevelopment of biofuels such as lignocellulosic ethanol represents a sustainable alternative in the transport sector. Wheat straw is a promising feedstock for bioethanol production in Europe due to its large production and high carbohydrates content. In a process to produce cellulosic ethanol, previous to the enzymatic hydrolysis to obtain fermentable sugars and the subsequent fermentation, a pretreatment step to break down the recalcitrance of lignocellulose fiber is essential. In this work, a range of steam explosion pretreatment conditions were evaluated according to different parameters: sugars recovery, degradation products generation, and enzymatic hydrolysis yields. Moreover, the enzymatic hydrolysis process was also studied at high substrate loadings, since operating at high solids loading is crucial for large scale development of ethanol production. Pretreatment at 200°C - 10 min resulted in higher enzymatic hydrolysis yield (91.7%) and overall glucose yields (35.4 g glucose/100 g wheat straw) but also higher production of toxic compound. In turn, the characteristics of the pretreated wheat straw at lower severity (Log R0=3.65) correspond to 190°C and 10 min, with minimal sugars degradation and toxics formation indicated a great potential for maximizing total sugars production by using optimal enzyme combinations including accessory enzymes in the enzymatic hydrolysis step.

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