scholarly journals Bioethanol Production from Coconut Fiber Using Alkaline Pretreatment and Acid Hydrolysis Method

2015 ◽  
Vol 5 (5) ◽  
pp. 320 ◽  
Author(s):  
Asyeni Miftahul Jannah ◽  
Faisol Asip
Keyword(s):  
Acid Hydrolysis ◽  
Alkaline Pretreatment ◽  
Bioethanol Production ◽  
Coconut Fiber ◽  
Hydrolysis Method

Improvements in the Acid-Hydrolysis Method of Determining the Crystallinity of Cellulose

1948 ◽  
Vol 18 (3) ◽  
pp. 149-154 ◽  
Author(s):  
Mary L. Nelson ◽  
Carl M. Conrad
Keyword(s):  
Acid Hydrolysis ◽  
Hydrolysis Method

scholarly journals Optimized acid hydrolysis of the polysaccharides from the seaweed Solieria filiformis (Kützing) P.W. Gabrielson for bioethanol production

2017 ◽  
Vol 39 (4) ◽  
pp. 423 ◽  
Author(s):  
George Meredite Cunha de Castro ◽  
Norma Maria Barros Benevides ◽  
Maulori Curié Cabral ◽  
Rafael De Souza Miranda ◽  
Enéas Gomes Filho ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Sulfuric Acid ◽  
Acid Hydrolysis ◽  
Kinetic Parameters ◽  
Renewable Resource ◽  
Bioethanol Production ◽  
Seaweed Species ◽  
Mild Conditions ◽  
Hydrolysis Of ◽  
Solieria Filiformis

 The seaweeds are bio-resource rich in sulfated and neutral polysaccharides. The tropical seaweed species used in this study (Solieria filiformis), after dried, shows 65.8% (w/w) carbohydrate, 9.6% (w/w) protein, 1.7% (w/w) lipid, 7.0% (w/w) moisture and 15.9% (w/w) ash. The dried seaweed was easily hydrolyzed under mild conditions (0.5 M sulfuric acid, 20 min.), generating fermentable monosaccharides with a maximum hydrolysis efficiency of 63.21%. Galactose and glucose present in the hydrolyzed were simultaneously fermented by Saccharomyces cerevisiae when the yeast was acclimated to galactose and cultivated in broth containing only galactose. The kinetic parameters of the fermentation of the seaweed hydrolyzed were Y(P⁄S) = 0.48 ± 0.02 g.g−1, PP = 0.27 ± 0.04 g.L−1.h−1, h = 94.1%, representing a 41% increase in bioethanol productivity. Therefore, S. filiformis was a promising renewable resource of polysaccharides easily hydrolyzed, generating a broth rich in fermentable monosaccharides for ethanol production. 

scholarly journals Acid and Enzymatic Hydrolyses of Rice Bran for Bioethanol Production

ALCHEMY ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 24
Author(s):  
Dewi Yuliani ◽  
Khoirul Achmad Julianto ◽  
Akyunul Jannah
Keyword(s):  
Enzymatic Hydrolysis ◽  
Hydrochloric Acid ◽  
Acid Hydrolysis ◽  
Sulphuric Acid ◽  
Rice Bran ◽  
Dilute Hydrochloric Acid ◽  
Cellulolytic Enzyme ◽  
Bioethanol Production ◽  
By Products ◽  
Sugar Source

<p class="BodyAbstract">Rice bran is one among many agricultural by-products containing ~50-60 wt.% of carbohydrate. The carbohydrate is a prominent sugar source for bioethanol production. The objective of this research was to study bioethanol production from rice bran by acid and enzymatic treatment. The variations of acid used were dilute hydrochloric acid and sulphuric acid, while variations of enzyme used were amylolytic and cellulolytic enzyme. Ethanol production of acid-hydrolyzed rice bran was 24.95±1.61% (v/v) by hydrochloric acid and 29.57±2.04% (v/v) by sulphuric acid. Ethanol produced by enzymatic hydrolysis was quite low i.e. 6.7±0.04%, and 8.86±0.29% (v/v) for amylolytic and cellulolytic hydrolysate, respectively.</p><p class="BodyAbstract"> </p><p>Keywords: Bioethanol, rice bran, acid hydrolysis, enzymatic hydrolysis</p>

scholarly journals Fermentation Study on Macroalgae Eucheuma cottonii for Bioethanol Production via Varying Acid Hydrolysis

2012 ◽  
pp. 219-240 ◽  
Author(s):  
Rachel Fran Mansa ◽  
Wei-Fang Chen ◽  
Siau-Jen Yeo ◽  
Yan-Yan Farm ◽  
Hafeza Abu Bakar ◽  
...  
Keyword(s):  
Acid Hydrolysis ◽  
Bioethanol Production ◽  
Eucheuma Cottonii

scholarly journals Ultimate pretreatment of lignocellulose in bioethanol production by combining both acidic and alkaline pretreatment

2019 ◽  
Vol 268 ◽  
pp. 03002 ◽  
Author(s):  
Dinh Quan Nguyen ◽  
Le Nhat Minh Nguyen ◽  
Thi Tuong An Tran ◽  
Hoai Nhan Cao ◽  
Thi Kim Phung Le ◽  
...  
Keyword(s):  
Waste Water ◽  
High Efficiency ◽  
Acidic Solution ◽  
Alkaline Pretreatment ◽  
Lignocellulosic Materials ◽  
Bioethanol Production ◽  
Saw Dust ◽  
Lignin Removal ◽  
High Basicity ◽  
Very High

Alkaline pretreatment has been known as the most popular method to process lignocellulosic materials for bioethanol production due to its simplicity and high efficiency. However, the waste water of the process has a very high basicity, which requires neutralization with acids upon further disposal. In this study, rubber wood saw dust (Hevea brasiliensis) was employed as lignocellulosic material and its pretreatment was inspected with both diluted H2SO4 and NaOH in different combination ways. Hereby, acid was used not only for waste water neutralization but also to contribute to lignin removal. Analysis results showed that an aqueous solution of 2.0 - 2.5 wt.% H2SO4 can be used to treat the biomass followed by alkaline pretreatment. By this so-called combo-pretreatment technique, cellulose was well preserved without significant hydrolysis while the final pretreatment efficiency was up to 63.0%, compared to 48.2% of using only the alkaline solution and 13.7% of using only the acidic solution. Finally, alkaline waste water can be mixed to be neutralized with acidic waste water from the two previous steps. This innovated technique improved the pretreatment efficiency almost without increasing in chemical cost.

Preparation of κ-carra-oligosaccharides with microwave assisted acid hydrolysis method

2015 ◽  
Vol 14 (2) ◽  
pp. 345-349 ◽  
Author(s):  
Guangsheng Li ◽  
Xia Zhao ◽  
Youjing Lv ◽  
Miaomiao Li ◽  
Guangli Yu
Keyword(s):  
Acid Hydrolysis ◽  
Hydrolysis Method ◽  
Microwave Assisted

Utilization of sugarcane bagasse for bioethanol production: Sono-assisted acid hydrolysis approach

2011 ◽  
Vol 102 (14) ◽  
pp. 7119-7123 ◽  
Author(s):  
Rajendran Velmurugan ◽  
Karuppan Muthukumar
Keyword(s):  
Acid Hydrolysis ◽  
Sugarcane Bagasse ◽  
Bioethanol Production
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