scholarly journals Production of levulinic acid from sugarcane bagasse

2016 ◽  
Author(s):  
◽  
Lethiwe Debra Mthembu
Keyword(s):  
Sulphuric Acid ◽  
Sugarcane Bagasse ◽  
Levulinic Acid ◽  
Methanesulfonic Acid ◽  
Hot Water ◽  
North Coast ◽  
Environment Friendly ◽  
The North ◽  
Liquid Hot Water ◽  
Pre Treatment

The main aim of this work was to produce levulinic acid (LA) from sugarcane bagasse (SB) and since there is approximately 3 000 000 tons of bagasse produced per annum by 16 factories that are located on the north coast of Kwa-Zulu Natal, after the extraction of sugar. For this project fructose was firstly used for the production of LA, thereafter SB was used to produce LA. Cellulose was extracted from sugarcane bagasse using two types of pre-treatments namely (i) acid-alkali pre-treatment and (ii) liquid hot water (LHW). In the latter method acid hydrolysis and enzymatic hydrolysis was used to hydrolyse cellulose to glucose. For the acid-alkali pre-treatment work, two types of bagasse was used namely (i) mill-run bagasse and (ii) depithed bagasse and for the LHW a mill-run bagasse (pellets form) was used. In both pre-treatment methods the glucose solution was then acid catalysed by two different acids (i) an environment friendly acid, methanesulfonic acid (MSA) and (ii) sulphuric acid, producing levulinic acid. The results showed that MSA and sulphuric acid produced almost the same yield of LA but, MSA is preferred for the production of LA since it is less toxic and less corrosive than sulphuric acid.

scholarly journals Xylo-oligosaccharides and Ethanol Production from Liquid Hot Water Hydrolysate of Sugarcane Bagasse

BioResources ◽  
2014 ◽  
Vol 10 (1) ◽  
Author(s):  
Qiang Yu ◽  
Chunxun Xu ◽  
Xinshu Zhuang ◽  
Zhenhong Yuan ◽  
Minchao He ◽  
...  
Keyword(s):  
Ethanol Production ◽  
Sugarcane Bagasse ◽  
Hot Water ◽  
Liquid Hot Water

EFFECT OF PRE-SOWING TREATMENT ON THE SEED EMERGENCE OF DIOSPYROS MESPILIFORMIS

2021 ◽  
pp. 11-19
Author(s):  
M Atiku ◽  
◽  
A Abdulrahman ◽  
A.S Ambursa ◽  
M Muhammed ◽  
...  
Keyword(s):  
Sulphuric Acid ◽  
Mass Production ◽  
Tap Water ◽  
Early Growth ◽  
Hot Water ◽  
State University ◽  
Silvicultural Treatments ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Pre Treatment

This study was carried out at Kebbi State University of Science and Technology, Aliero, Kebbi State, to determine the effect of silvicultural treatments on the germination and early growth of Diospyros mespiliformis. The study was carried out in the Forestry Laboratory of the Faculty of Agriculture. The effectiveness of nine (9) different presowingtreatments were assessed, control inclusive. Treatment 1 (TRT1) seeds were soaked in tap water for 48 hours, Treatment 2 (TRT2) seeds were mechanically scarified opposite to microphyle, treatments 3, 4, and 5 (TRT3, TRT4, TRT5) seeds were immersed in H2SO4 for 5, 10 and 15 minutes respectively, treatments 6, 7 and 8 (TRT6, TRT7 and TRT8) seeds were soaked in hot water (100oC) for 5, 10 and 15 minutes respectively and untreated seeds (CNTRL). Completely Randomized Design with three (3) replications was used. The data obtained were analyzed using one-way Analysis of Variance (ANOVA).Seeds of D. mespiliformis subjected to TRT1, TRT2, TRT3, TRT6, TRT7 and TRT8 recorded with highest FGP (100%) and was found to differ significantly (P<0.05) with other treatment and CNTRL recorded the least FGP (83.33%).Thus, TRT 3 was shown to be the best asit’s recorded with 100% FGP, MGT value of 7.53, highest GRI (14.57), lower FDG (6), highest GE (11.57), and maximum GI value (913.33).Based on the result, pre-treatment of D. mespiliformis seeds with sulphuric acid is recommended for the mass production and uniform germination.

scholarly journals Effect of Lignin Content on Cellulolytic Saccharification of Liquid Hot Water Pretreated Sugarcane Bagasse

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 623 ◽  
Author(s):  
Rafaela I. S. Ladeira Ázar ◽  
Sidnei Emilio Bordignon-Junior ◽  
Craig Laufer ◽  
Jordan Specht ◽  
Drew Ferrier ◽  
...  
Keyword(s):  
Sugarcane Bagasse ◽  
Plant Cell Wall ◽  
Lignin Content ◽  
Blocking Agent ◽  
Enzymatic Digestion ◽  
Hot Water ◽  
Severity Factor ◽  
Liquid Hot Water ◽  
Cellulose Digestibility ◽  
Pretreated Sugarcane Bagasse

Lignin contributes to the rigid structure of the plant cell wall and is partially responsible for the recalcitrance of lignocellulosic materials to enzymatic digestion. Overcoming this recalcitrance is one the most critical issues in a sugar-flat form process. This study addresses the effect of low lignin sugarcane bagasse on enzymatic hydrolysis after liquid hot water pretreatment at 190 °C and 20 min (severity factor: 3.95). The hydrolysis of bagasse from a sugarcane line selected for a relatively low lignin content, gave an 89.7% yield of cellulose conversion to glucose at 40 FPU/g glucan versus a 68.3% yield from a comparably treated bagasse from the high lignin bred line. A lower enzyme loading of 5 FPU/g glucan (equivalent to 3.2 FPU/g total solids) resulted in 31.4% and 21.9% conversion yields, respectively, for low and high lignin samples, suggesting the significance of lignin content in the saccharification process. Further increases in the enzymatic conversion of cellulose to glucose were achieved when the bagasse sample was pre-incubated with a lignin blocking agent, e.g., bovine serum albumin (50 mg BSA/g glucan) at 50 °C for 1 h prior to an actual saccharification. In this work, we have demonstrated that even relatively small differences in lignin content can result in considerably increased sugar production, which supports the dissimilarity of bagasse lignin content and its effects on cellulose digestibility. The increased glucose yields with the addition of BSA helped to decrease the inhibition of non-productive absorption of cellulose enzymes onto lignin and solid residual lignin fractions.

Ethanol–water organosolv delignification of liquid hot water (LHW) pretreated sugarcane bagasse enhanced by high–pressure carbon dioxide (HP–CO2)

2016 ◽  
Vol 94 ◽  
pp. 942-950 ◽  
Author(s):  
Leandro Vinícius Alves Gurgel ◽  
Maria Teresa Borges Pimenta ◽  
Antonio Aprigio da Silva Curvelo
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Sugarcane Bagasse ◽  
Hot Water ◽  
Liquid Hot Water ◽  
Pretreated Sugarcane Bagasse

Effect of liquid hot water pre-treatment on sugarcane press mud methane yield

2014 ◽  
Vol 169 ◽  
pp. 284-290 ◽  
Author(s):  
Lisbet Mailin López González ◽  
Ileana Pereda Reyes ◽  
Jo Dewulf ◽  
Jörn Budde ◽  
Monika Heiermann ◽  
...  
Keyword(s):  
Hot Water ◽  
Methane Yield ◽  
Press Mud ◽  
Liquid Hot Water ◽  
Pre Treatment

scholarly journals Pseudo-lignin retarded bioconversion of sugarcane bagasse holocellulose after liquid hot water and acid pretreatments

BioResources ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. 4052-4063
Author(s):  
Haiyan Yang ◽  
Yuanchen Zhu ◽  
Yan Jin ◽  
Fuhou Lei ◽  
Zhengjun Shi ◽  
...  
Keyword(s):  
Sugarcane Bagasse ◽  
Low Temperatures ◽  
Degradation Products ◽  
Structural Characteristics ◽  
Hot Water ◽  
Acid Pretreatment ◽  
Liquid Hot Water ◽  
Carbohydrate Degradation ◽  
Pretreatment Temperature ◽  
Bioethanol Yield

Pseudo-lignin derived from the condensation of carbohydrate degradation products can retard the bioconversion of lignocellulose. In this work, liquid hot water (150 to 190 °C) and 1% H2SO4 pretreatments (130 to 190 °C) were used on sugarcane bagasse holocellulose for 3 h to generate pseudo-lignin. The effects of pseudo-lignin generation on structural characteristics and bioconversion of substrates were evaluated. The results showed that the formation of pseudo-lignin increased the hydrophobicity of the substrates. After LHW pretreatments and acid pretreatments at low temperatures (<150 °C), most of the xylans were removed, yielding 2.1 to 5.4% pseudo-lignin. Increasing acid pretreatment temperature to 170 and 190 °C yielded 34.3% and 93.6% pseudo-lignin, respectively. After pretreatment, the accessibilities and bioconversions of substrates were enhanced by degradation of xylans, increasing glucose conversions and bioethanol productions of substrates from 53.2 to 85.3%, and 9.9 to 13.1 g/L, respectively. However, large amounts of pseudo-lignin were generated during acid pretreatments at 170 °C, reducing glucose conversion and bioethanol yield to 45.6% and 6.3 g/L, respectively.

scholarly journals Enhancing liquid hot water (LHW) pretreatment of sugarcane bagasse by high pressure carbon dioxide (HP-CO2)

2014 ◽  
Vol 57 ◽  
pp. 141-149 ◽  
Author(s):  
Leandro Vinícius Alves Gurgel ◽  
Maria Teresa Borges Pimenta ◽  
Antonio Aprigio da Silva Curvelo
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Sugarcane Bagasse ◽  
Hot Water ◽  
Liquid Hot Water

Sequential fractionation of sugarcane bagasse using liquid hot water and formic acid-catalyzed glycerol-based organosolv with solvent recycling

2020 ◽  
Author(s):  
Chayanon Chotirotsukon ◽  
Marisa Raita ◽  
Misato Yamada ◽  
Hiroshi Nishimura ◽  
Takashi Watanabe ◽  
...  
Keyword(s):  
Formic Acid ◽  
Sugarcane Bagasse ◽  
Hot Water ◽  
Sequential Fractionation ◽  
Liquid Hot Water ◽  
Acid Catalyzed
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