An economic and environmental evaluation for bamboo-derived bioethanol

RSC Advances ◽  
2014 ◽  
Vol 4 (56) ◽  
pp. 29604-29611 ◽  
Author(s):  
L. Wang ◽  
J. Littlewood ◽  
R. J. Murphy
Keyword(s):  
Aqueous Ammonia ◽  
Hot Water ◽  
Dilute Acid ◽  
Environmental Evaluation ◽  
Liquid Hot Water ◽  
Soaking In Aqueous Ammonia

The potential to obtain bioethanol from bamboo using three different pretreatment technologies (liquid hot water (LHW), dilute acid (DA) and soaking in aqueous ammonia (SAA)) is assessed via techno-economic and environmental analyses.

scholarly journals Effect of Dilute Acid and Alkaline Pretreatment of Typha australis (Typha Grass) for Bioethanol Production

2018 ◽  
pp. 1-6
Author(s):  
Bala, Auwalu ◽  
Farouq, Ahmad Ali ◽  
Ibrahim, Aliyu Dabai ◽  
Muhammad, Chika
Keyword(s):  
Enzymatic Saccharification ◽  
Reducing Sugar ◽  
Hot Water ◽  
Dilute Acid Pretreatment ◽  
Sugar Concentration ◽  
Bioethanol Production ◽  
Dilute Acid ◽  
Liquid Hot Water ◽  
Typha Australis ◽  
Reducing Sugar Concentration

Typha australis (Typha grass) obtained from Kware Lake was used in this research to produce bioethanol. Different pretreatment methods including dilute acid (0.2M H2SO4), dilute alkaline (0.2M NaOH) and liquid hot water pretreatments were used to pretreat the Typha grass sample before enzymatic saccharification for 7 days using Aspergillus niger isolated from soil sediment and the hydrolysate was seeded with Saccharomyces cerevisiae isolated from palm wine to produce bioethanol. HPLC was used to analyze bioethanol product. The result showed that pretreatment with 0.2M H2SO4 removed more hemicelluloses (7.0%) when compared with other pretreatment methods used, but pretreatment with 0.2M NaOH and liquid hot water removed more lignin (14.29%) than dilute acid pretreatment. The highest percentage reducing sugar concentration of 0.58% was obtained from lower part of the sample pretreated with liquid hot water while Typha grass pretreated with 0.2M H2SO4 and 0.2M NaOH produced the highest percentage reducing sugar concentration of 0.32% each from the upper part of the sample. Also, the highest Bioethanol concentration of 2.07% was obtained at day 6 of fermentation from the Typha grass pretreated with liquid hot water while Typha grass pretreated with 0.2M H2SO4 and 0.2M NaOH produced highest Bioethanol concentration of 0.43% and 0.54% respectively. The results indicate that Typha grass can be harnessed for bioethanol production thereby reducing their negative impact on Lakes.

Pretreatment of sugarcane bagasse with liquid hot water and aqueous ammonia

2013 ◽  
Vol 144 ◽  
pp. 210-215 ◽  
Author(s):  
Qiang Yu ◽  
Xinshu Zhuang ◽  
Zhenhong Yuan ◽  
Wei Qi ◽  
Wen Wang ◽  
...  
Keyword(s):  
Sugarcane Bagasse ◽  
Aqueous Ammonia ◽  
Hot Water ◽  
Liquid Hot Water

scholarly journals Diverse Banana Pseudostems and Rachis Are Distinctive for Edible Carbohydrates and Lignocellulose Saccharification towards High Bioethanol Production under Chemical and Liquid Hot Water Pretreatments

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3870
Author(s):  
Jingyang Li ◽  
Fei Liu ◽  
Hua Yu ◽  
Yuqi Li ◽  
Shiguang Zhou ◽  
...  
Keyword(s):  
Soluble Sugars ◽  
Enzymatic Saccharification ◽  
Hot Water ◽  
Biofuel Production ◽  
Bioenergy Crops ◽  
Bioethanol Production ◽  
Factors Affecting ◽  
Liquid Hot Water ◽  
Biomass Processing ◽  
Banana Crops

Banana is a major fruit crop throughout the world with abundant lignocellulose in the pseudostem and rachis residues for biofuel production. In this study, we collected a total of 11 pseudostems and rachis samples that were originally derived from different genetic types and ecological locations of banana crops and then examined largely varied edible carbohydrates (soluble sugars, starch) and lignocellulose compositions. By performing chemical (H2SO4, NaOH) and liquid hot water (LHW) pretreatments, we also found a remarkable variation in biomass enzymatic saccharification and bioethanol production among all banana samples examined. Consequently, this study identified a desirable banana (Refen1, subgroup Pisang Awak) crop containing large amounts of edible carbohydrates and completely digestible lignocellulose, which could be combined to achieve the highest bioethanol yields of 31–38% (% dry matter), compared with previously reported ones in other bioenergy crops. Chemical analysis further indicated that the cellulose CrI and lignin G-monomer should be two major recalcitrant factors affecting biomass enzymatic saccharification in banana pseudostems and rachis. Therefore, this study not only examined rich edible carbohydrates for food in the banana pseudostems but also detected digestible lignocellulose for bioethanol production in rachis tissue, providing a strategy applicable for genetic breeding and biomass processing in banana crops.

scholarly journals Liquid Hot Water Pretreatment and Enzymatic Hydrolysis as a Valorization Route of Italian Green Pepper Waste to Delivery Free Sugars

Foods ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1640
Author(s):  
M.A. Martín-Lara ◽  
L. Chica-Redecillas ◽  
A. Pérez ◽  
G. Blázquez ◽  
G. Garcia-Garcia ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Liquid Fraction ◽  
Hot Water ◽  
Effect Of Temperature ◽  
Green Pepper ◽  
Free Sugars ◽  
Liquid Hot Water Pretreatment ◽  
Liquid Hot Water ◽  
Water Pretreatment ◽  
Hot Water Pretreatment

In this work, liquid hot water pretreatment (autohydrolysis) was used to improve enzymatic hydrolysis of a commonly consumed vegetable waste in Spain, Italian green pepper, to finally produce fermentable sugars. Firstly, the effect of temperature and contact time on sugar recovery during pretreatment (in insoluble solid and liquid fraction) was studied in detail. Then, enzymatic hydrolysis using commercial cellulase was performed with the insoluble solid resulting from pretreatment. The objective was to compare results with and without pretreatment. The results showed that the pretreatment step was effective to facilitate the sugars release in enzymatic hydrolysis, increasing the global sugar yield. This was especially notable when pretreatment was carried out at 180 °C for 40 min for glucose yields. In these conditions a global glucose yield of 61.02% was obtained. In addition, very low concentrations of phenolic compounds (ranging from 69.12 to 82.24 mg/L) were found in the liquid fraction from enzymatic hydrolysis, decreasing the possibility of fermentation inhibition produced by these components. Results showed that Italian green pepper is an interesting feedstock to obtain free sugars and prevent the enormous quantity of this food waste discarded annually.

Optimizing Liquid Hot Water pretreatment conditions to enhance sugar recovery from wheat straw for fuel-ethanol production

Fuel ◽  
2008 ◽  
Vol 87 (17-18) ◽  
pp. 3640-3647 ◽  
Author(s):  
J.A. Pérez ◽  
I. Ballesteros ◽  
M. Ballesteros ◽  
F. Sáez ◽  
M.J. Negro ◽  
...  
Keyword(s):  
Ethanol Production ◽  
Wheat Straw ◽  
Fuel Ethanol ◽  
Hot Water ◽  
Sugar Recovery ◽  
Liquid Hot Water Pretreatment ◽  
Liquid Hot Water ◽  
Water Pretreatment ◽  
Pretreatment Conditions ◽  
Hot Water Pretreatment
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