scholarly journals Production of Fermentable Sugars from Waterhyacinth by High-Temperature Dilute-Acid Hydrolysis Method

1999 ◽  
Vol 23 (1) ◽  
pp. 75-84
Author(s):  
Z.P. Masende ◽  
J.H.Y. Katima ◽  
E. Masanja
Keyword(s):  
High Temperature ◽  
Acid Hydrolysis ◽  
Fermentable Sugars ◽  
Dilute Acid ◽  
Dilute Acid Hydrolysis ◽  
Hydrolysis Method

Practical Limitations of the Dilute Acid Hydrolysis Method for Solubilizing Meat and Bone Meal Protein

2017 ◽  
Vol 5 (12) ◽  
pp. 11652-11659 ◽  
Author(s):  
Matthew Essandoh ◽  
Rafael A. Garcia ◽  
Christine M. Nieman ◽  
Lorelie P. Bumanlag ◽  
George J. Piazza ◽  
...  
Keyword(s):  
Acid Hydrolysis ◽  
Dilute Acid ◽  
Meat And Bone Meal ◽  
Bone Meal ◽  
Dilute Acid Hydrolysis ◽  
Hydrolysis Method ◽  
Meal Protein

scholarly journals Bioethanol production from lignocellulosic sugarcane leaves and tops

2017 ◽  
Vol 28 (3) ◽  
pp. 1 ◽  
Author(s):  
Charlie Marembu Dodo ◽  
Samphson Mamphweli ◽  
Omobola Okoh
Keyword(s):  
Acid Hydrolysis ◽  
Sodium Hydroxide ◽  
Cost Effective ◽  
Enzyme Hydrolysis ◽  
Fermentable Sugars ◽  
Bioethanol Production ◽  
Dilute Acid ◽  
Dilute Acid Hydrolysis ◽  
Pre Treatment ◽  
Biological Methods

Bioethanol production is one of the most promising possible substitutes for fossil-based fuels, but there is a need to make available cost-effective methods of production if it is to be successful. Various methods for the production of bioethanol using different feedstocks have been explored. Bioethanol synthesis from sugarcane, their tops and leaves have generally been regarded as waste and discarded. This investigation examined the use of lignocellulosic sugarcane leaves and tops as biomass and evaluated their hydrolysate content. The leaves and tops were hydrolysed using concentrated and dilute sulphuric acid and compared with a combination of oxidative alkali-peroxide pre-treatment with enzyme hydrolysis using the enzyme cellulysin® cellulase. Subsequent fermentation of the hydrolysates into bioethanol was done using the yeast saccharomyces cerevisae. The problem of acid hydrolysis to produce inhibitors was eliminated by overliming using calcium hydroxide and this treatment was subsequently compared with sodium hydroxide neutralisation. It was found that oxidative alkali pre-treatment with enzyme hydrolysis gave the highest yield of fermentable sugars of 38% (g/g) for 7% (v/v) peroxide pretreated biomass than 36% (g/g) for 5% (v/v) with the least inhibitors. Concentrated and dilute acid hydrolysis each gave yields of 25% (g/g) and 22% (g/g) respectively, although the acid required a neutralisation step, resulting in dilution. Alkaline neutralisation of acid hydrolysates using sodium hydroxide resulted in less dilution and loss of fermentable sugars, compared with overliming. Higher yields of bioethanol of 13.7 g/l were obtained from enzyme hydrolysates than the 6.9 g/l ethanol from dilute acid hydrolysates. There was more bioethanol yield of 13.7 g/l after 72 hours of fermentation with the yeast than the 7.0 g/l bioethanol after 24 hours.This research showed that it is possible to use sugarcane waste material to supplement biofuel requirements and that combining the chemical and biological methods of pretreatments can give higher yields at a faster rate.

Obtaining fermentable sugars by dilute acid hydrolysis of hemicellulose and fast pyrolysis of cellulose

2015 ◽  
Vol 182 ◽  
pp. 364-367 ◽  
Author(s):  
Liqun Jiang ◽  
Anqing Zheng ◽  
Zengli Zhao ◽  
Fang He ◽  
Haibin Li ◽  
...  
Keyword(s):  
Acid Hydrolysis ◽  
Fast Pyrolysis ◽  
Fermentable Sugars ◽  
Dilute Acid ◽  
Dilute Acid Hydrolysis ◽  
Hydrolysis Of

scholarly journals Xylose Release From Sunflower Stalk by Coupling Autohydrolysis and Enzymatic Post-Hydrolysis

2021 ◽  
Author(s):  
Fatmagül HALICI-DEMİR ◽  
Özlem AKPINAR
Keyword(s):  
Enzyme Activity ◽  
Acid Hydrolysis ◽  
Substrate Concentration ◽  
High Yield ◽  
Dilute Acid ◽  
Dilute Acid Hydrolysis ◽  
Hydrolysis Method ◽  
Optimization Study ◽  
Xylose Production ◽  
Hydrolysis Of

Abstract The purpose of this study was to obtain xylose-based fermentation media from autohydrolysis liquors of sunflower stalk by using commercial xylanase formulation. Xylose is generally produced from xylan by diluted acid hydrolysis that causes the formation of some unwanted compounds during the process. As an alternative to dilute acid hydrolysis method, enzymatic hydrolysis of xylan can provide more specific hydrolysis under moderate conditions and does not cause the formation of undesirable compounds. In this study, xylose production carried out with Trichoderma longibrachiatum xylanase on solubilized xylan form of sunflower stalk, which was hydrothermally pretreated for 1 hour at 160ºC. The effects of substrate concentration and enzyme activity were investigated for the production of xylose. To obtain a high xylose yield and selectivity, the optimization study was conducted by the response surface methodology. The optimum substrate concentration and enzyme activity were found as 60 mg ds/mL CAL and 234 U/mL, respectively. Under the optimum condition, xylose yield and selectivity were found to be 69.5% and 8.2 g/g, respectively. This study showed that xylose could be produce with a high yield without requiring a neutralization process and corrosive chemical reagent apart from water.

scholarly journals Effect of Dilute-acid Hydrolysis Conditions on Sugar and Productions from Paragrass

2019 ◽  
Vol 265 ◽  
pp. 012010 ◽  
Author(s):  
Vipa Thongtus ◽  
Sasikarn Nuchdang ◽  
Papin Chirathivat ◽  
Elvin J. Moore ◽  
Chantaraporn Phalakornkule
Keyword(s):  
Acid Hydrolysis ◽  
Dilute Acid ◽  
Dilute Acid Hydrolysis ◽  
Hydrolysis Conditions
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