scholarly journals Degradation and selective ligninolysis of wheat straw and banana stem for an efficient bioethanol production using fungal and chemical pretreatment

3 Biotech ◽  
2012 ◽  
Vol 3 (5) ◽  
pp. 365-372 ◽  
Author(s):  
Shilpi Thakur ◽  
Bhuvnesh Shrivastava ◽  
Snehal Ingale ◽  
Ramesh C. Kuhad ◽  
Akshaya Gupte
Keyword(s):  
Wheat Straw ◽  
Bioethanol Production ◽  
Chemical Pretreatment ◽  
Banana Stem

Alkali pretreatment of wheat straw followed by microbial hydrolysis for bioethanol production

2017 ◽  
Vol 40 (9) ◽  
pp. 1203-1211 ◽  
Author(s):  
Bahiru Tsegaye ◽  
Chandrajit Balomajumder ◽  
Partha Roy
Keyword(s):  
Wheat Straw ◽  
Bioethanol Production ◽  
Alkali Pretreatment ◽  
Microbial Hydrolysis

scholarly journals Study of wheat straw delignification in a rotary-pulsation apparatus

2020 ◽  
pp. 103-110
Author(s):  
Larysa Sablii ◽  
Oleksandr Obodovych ◽  
Vitalii Sydorenko ◽  
Tamila Sheyko
Keyword(s):  
Wheat Straw ◽  
Production Technology ◽  
Raw Materials ◽  
Hydrolytic Enzymes ◽  
Bioethanol Production ◽  
Second Generation Bioethanol ◽  
Pulsation Apparatus ◽  
Rotary Pulsation Apparatus ◽  
Solid Water ◽  
Pre Treatment

This paper presents the results of studies of isolation lignin and hemicelluloses efficiency during the pre-treatment of wheat straw for hydrolysis in a rotary-pulsation apparatus. The pre-treatment of lignocellulosic raw materials for hydrolysis is a necessary step in the second-generation bioethanol production technology. The lignocellulose complex is destroyed during this process, and this allows hydrolytic enzymes access to the surface of cellulose fibers. The pre-treatment is the most energy-consuming stage in bioethanol production technology, since it usually occurs at high temperature and pressure for a significant time. One of the ways to improve the efficiency of this process is the use of energy-efficient equipment that allows intensifying heat and mass transfer. An example of such equipment is a rotary-pulsation apparatus, which are effective devices in stirring, homogenization, dispersion technologies, etc. The treatment of wheat straw in a rotary-pulsation apparatus was carried out under atmospheric pressure without external heat supply at solid/water ratios of 1:10 and 1:5 in the presence of alkali. It was determined that the treatment of the water dispersion of straw at ratio of 1:10 due to the energy dissipation during 70 minutes leads to the release of 42 % of lignin and 25.76 % of easily hydrolyzed polysaccharides. Changing the solid / water ratio from 1:10 to 1:5 leads to an increase in the yield of lignin and easily hydrolyzed polysaccharides to 58 and 33.38 %, respectively.

Statistical Optimization of Saccharification of Alkali Pretreated Wheat Straw for Bioethanol Production

2016 ◽  
Vol 7 (6) ◽  
pp. 1389-1396 ◽  
Author(s):  
Muhammad Irfan ◽  
Umar Asghar ◽  
Muhammad Nadeem ◽  
Rubina Nelofer ◽  
Quratulain Syed ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Statistical Optimization ◽  
Bioethanol Production ◽  
Pretreated Wheat Straw

Bioethanol Production from Rice Straw in the MAFF Research Project, Japan

2009 ◽  
Vol 1219 ◽  
Author(s):  
Ken Tokuyasu
Keyword(s):  
Heat Treatment ◽  
Saccharomyces Cerevisiae ◽  
Rice Straw ◽  
Enzymatic Saccharification ◽  
Bioethanol Production ◽  
Chemical Pretreatment ◽  
Simple Method ◽  
Herbaceous Biomass ◽  
Free Glucose ◽  
Simultaneous Saccharification

AbstractRice straw is among the most abundant herbaceous biomass, and regarded as the central feedstock for bioethanol production in Japan. We found that significant amounts of soft carbohydrates (SCs), defined as carbohydrates readily recoverable by mere extraction from the biomass or brief enzymatic saccharification, exist in rice straw in the form of free glucose, free fructose, sucrose, starch, and β-1,3-1,4-glucan. Based on the finding, we proposed a simple method for bioethanol production from rice straw samples with SCs, by a heat treatment for sterilization and starch gelatinization, followed by simultaneous saccharification/fermentation with Saccharomyces cerevisiae. This method would offer an efficient process for bioethanol production without the aid of harsh thermo/chemical pretreatment step.

scholarly journals Thermodynamic analysis of bioethanol production from wheat straw

2017 ◽  
Vol 142 ◽  
pp. 552-557
Author(s):  
Geoffrey P. Hammond ◽  
Ross V.M. Mansell
Keyword(s):  
Wheat Straw ◽  
Thermodynamic Analysis ◽  
Bioethanol Production

scholarly journals Cellulases production on paper and sawdust using native Trichoderma asperellum

2018 ◽  
Vol 23 (3) ◽  
pp. 419-436
Author(s):  
Y Maritza Zapata ◽  
Angelica Galviz-Quezada ◽  
Víctor Manuel Osorio Echeverri
Keyword(s):  
Solid State ◽  
Solid State Fermentation ◽  
Second Generation ◽  
Lignocellulosic Material ◽  
Trichoderma Asperellum ◽  
Bioethanol Production ◽  
Chemical Pretreatment ◽  
Cellulosic Materials ◽  
Second Generation Biofuels ◽  
Glycosidic Bonds

Microbial cellulases are industrially used enzymes that catalyze the cleavage of the glycosidic bonds of cellulose. This hydrolysis yields sugars that can be used in processes such as bioethanol production. These enzymes are mainly produced by fungi belonging to the genus Trichoderma via submerged or solid state fermentation with cellulosic materials as substrates. Recent publications have increasingly demonstrated that alternatives to T.reesei enzymes in the production of second generation biofuels exist. Here, cellulolytic activities of crude extracts obtained from a native isolate of T.asperellum from coffe pulp and a strain of T.reesei were evaluated. Solid state fermentations were performed using paper and sawdust as substrates. The activities were measured after 12 days of incubation. The extracts obtained from T.reesei showed higher cellulase and endoglucanase activities (6.5 and 5.8 U/g) than those obtained using T.asperellum (5.6 and 4.1 U/g) with paper as substrate. There were no significant differences between isolates when grownon sawdust. It was possible to verify that native T.asperellum was able to produce cellulases on lignocellulosic material such as moistened paper and sawdust without having undergone a chemical pretreatment.

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