scholarly journals Optimization of Alkaline and Dilute Acid Pretreatment of Agave Bagasse by Response Surface Methodology

2015 ◽  
Vol 3 ◽  
Author(s):  
Abimael I. Ávila-Lara ◽  
Jesus N. Camberos-Flores ◽  
Jorge A. Mendoza-Pérez ◽  
Sarah R. Messina-Fernández ◽  
Claudia E. Saldaña-Duran ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Dilute Acid Pretreatment ◽  
Dilute Acid ◽  
Acid Pretreatment

Dilute Acid Pretreatment of Wheat Straw: A Predictive Model for Energy Consumption Using Response Surface Methodology

2013 ◽  
Author(s):  
Xiaoxu Song ◽  
Meng Zhang ◽  
Z. J. Pei ◽  
A. J. Nottingham ◽  
P. F. Zhang
Keyword(s):  
Response Surface Methodology ◽  
Energy Consumption ◽  
Response Surface ◽  
Minimum Energy ◽  
Solid Content ◽  
Dilute Acid Pretreatment ◽  
Process Conditions ◽  
Dilute Acid ◽  
Acid Pretreatment ◽  
Minimum Energy Consumption

Response surface methodology was used to study the effects of parameters namely, time, temperature, and solid content and to optimize the process conditions for the minimum energy consumption in dilute acid pretreatment. Box-Behnken design using response surface methodology was employed. Effects of time and temperature are significant at the significant level of α = 0.05. Longer time and higher temperature result in higher power energy consumption. The best optimal values of the process conditions are time 14–21 min and temperature 129–139 °C.

scholarly journals Model study on dilute acid pretreatment of argan pulp for bioethanol production using response surface methodology

2019 ◽  
Vol 8 (4) ◽  
pp. 290-301
Author(s):  
Fatima Zahra Zouhair ◽  
Younes En-Nahli ◽  
Mohammed Rachid Kabbour ◽  
Fatima Ebich ◽  
Aouatif Benali ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Reducing Sugars ◽  
Dilute Acid Pretreatment ◽  
Bioethanol Production ◽  
Dilute Acid ◽  
Operational Parameters ◽  
Acid Pretreatment ◽  
Model Study ◽  
Acid Type

The present work describes comparative dilute acid pretreatment of the argan pulp (residue produced during the argan oil extraction) used as an economical source for bioethanol production. Response surface methodology was used to optimize the pretreatment process and to explore the effect of operational parameters (acid concentration, temperature, time and biomass loading), depending on the acid type (HCl, H2SO4) and pretreatment approach, on total and reducing sugars recovery, in addition to phenolic compounds rate as inhibitors produced during pretreatment process. Experimental results predict an optimal yield of total and reducing sugars of 171.46 mg/ml and 54.83 mg/ml, respectively, were achieved at an optimized time of 30 min with 7% of sulfuric acid at 160°C using 40 % for biomass loading.

Dilute acid pretreatment of rice straw, structural characterization and optimization of enzymatic hydrolysis conditions by response surface methodology

RSC Advances ◽  
2015 ◽  
Vol 5 (58) ◽  
pp. 46525-46533 ◽  
Author(s):  
Siddheshwar Dnyandev Kshirsagar ◽  
Pankajkumar Ramdas Waghmare ◽  
Prakash Chandrakant Loni ◽  
Sushama Anandrao Patil ◽  
Sanjay Prabhu Govindwar
Keyword(s):  
Response Surface Methodology ◽  
Enzymatic Hydrolysis ◽  
Production Technology ◽  
Structural Characterization ◽  
Dilute Acid Pretreatment ◽  
Fermentable Sugars ◽  
Dilute Acid ◽  
Acid Pretreatment ◽  
Hydrolysis Conditions ◽  
A Current

Efficient conversion of fermentable sugars from cheap lignocellulosic biomass is a current need in viable ethanol production technology.

scholarly journals Understanding the effects of different residual lignin fractions in acid-pretreated bamboo residues on its enzymatic digestibility

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Wenqian Lin ◽  
Jinlai Yang ◽  
Yayue Zheng ◽  
Caoxing Huang ◽  
Qiang Yong
Keyword(s):  
Enzymatic Hydrolysis ◽  
Negative Impact ◽  
Dilute Acid Pretreatment ◽  
Residual Lignin ◽  
Dilute Acid ◽  
Enzymatic Digestibility ◽  
Acid Pretreatment ◽  
Organic Reagents ◽  
Milled Wood Lignin ◽  
Affinity Constants

Abstract Background During the dilute acid pretreatment process, the resulting pseudo-lignin and lignin droplets deposited on the surface of lignocellulose and inhibit the enzymatic digestibility of cellulose in lignocellulose. However, how these lignins interact with cellulase enzymes and then affect enzymatic hydrolysis is still unknown. In this work, different fractions of surface lignin (SL) obtained from dilute acid-pretreated bamboo residues (DAP-BR) were extracted by various organic reagents and the residual lignin in extracted DAP-BR was obtained by the milled wood lignin (MWL) method. All of the lignin fractions obtained from DAP-BR were used to investigate the mechanism for interaction between lignin and cellulase using surface plasmon resonance (SPR) technology to understand how they affect enzymatic hydrolysis Results The results showed that removing surface lignin significantly decreased the yield for enzymatic hydrolysis DAP-BR from 36.5% to 18.6%. The addition of MWL samples to Avicel inhibited its enzymatic hydrolysis, while different SL samples showed slight increases in enzymatic digestibility. Due to the higher molecular weight and hydrophobicity of MWL samples versus SL samples, a stronger affinity for MWL (KD = 6.8–24.7 nM) was found versus that of SL (KD = 39.4–52.6 nM) by SPR analysis. The affinity constants of all tested lignins exhibited good correlations (r > 0.6) with the effects on enzymatic digestibility of extracted DAP-BR and Avicel. Conclusions This work revealed that the surface lignin on DAP-BR is necessary for maintaining enzyme digestibility levels, and its removal has a negative impact on substrate digestibility.

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