Effect of Extruder Parameters and Moisture Content of Corn Stover and Big Bluestem on Sugar Recovery from Enzymatic Hydrolysis

2010 ◽  
Vol 2 (2) ◽  
pp. 91-113 ◽  
Author(s):  
C. Karunanithy ◽  
K. Muthukumarappan
Keyword(s):  
Enzymatic Hydrolysis ◽  
Moisture Content ◽  
Corn Stover ◽  
Sugar Recovery ◽  
Big Bluestem

scholarly journals Moisture Sorption Characteristics of Corn Stover and Big Bluestem

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
C. Karunanithy ◽  
K. Muthukumarappan ◽  
A. Donepudi
Keyword(s):  
Moisture Content ◽  
Corn Stover ◽  
Sorption Isotherms ◽  
Moisture Sorption ◽  
Isotherm Models ◽  
Big Bluestem ◽  
Moisture Sorption Isotherms ◽  
Typical Type ◽  
Different Temperatures ◽  
Gab Model

Moisture content is an important feedstock quality in converting it into energy through biochemical or thermochemical platforms. Knowledge of moisture sorption relationship is useful in drying and storage to preserve the quality of feedstocks. Moisture sorption isotherms for potential feedstocks such as corn stover and big bluestem are missing. EMC values of corn stover and big bluestem were determined using static gravimetric technique with saturated salt solutions (ERH 0.12–0.89) at different temperatures (20, 30, and 40°C). Depending upon the ERH values, EMC values were ranged from 8.0 to 19.6 and 8.8 to 19.2% db for corn stover and big bluestem, respectively, and they followed typical type II isotherm found in food materials. Nonlinear regression was used to fit five commonly used three-parameter isotherm models (i.e., modified Oswin model, modified Halsey model, modified Chung-Pfost model, modified Henderson model, and the modified Guggenheim-Anderson-de Boer (GAB) model) to the experimental data. Modified Halsey emerged as the best model with highF-statistic andR2values with lowEmandEsand fairly random scattered residual plot for corn stover and big bluestem. These models can be used to predict the equilibrium moisture content of these feedstocks starting from harvesting, drying, preprocessing, transportation, storage, and conversion.

scholarly journals A Comprehensive Investigation on the Effects of Biomass Particle Size in Cellulosic Biofuel Production

2018 ◽  
Vol 140 (4) ◽  
Author(s):  
Yang Yang ◽  
Meng Zhang ◽  
Donghai Wang
Keyword(s):  
Particle Size ◽  
Energy Consumption ◽  
Enzymatic Hydrolysis ◽  
Wheat Straw ◽  
Corn Stover ◽  
Sugar Yield ◽  
Size Reduction ◽  
Particle Sizes ◽  
Big Bluestem ◽  
Biomass Particle Size

Biofuels derived from cellulosic biomass offer one of the best near- to midterm alternatives to petroleum-based liquid transportation fuels. Biofuel conversion is mainly done through a biochemical pathway in which size reduction, pelleting, pretreatment, enzymatic hydrolysis, and fermentation are main processes. Many studies reveal that biomass particle size dictates the energy consumption in the size reduction. Biomass particle size also influences sugar yield in enzymatic hydrolysis, and biofuel yield in fermentation is approximately proportional to the former enzymatic hydrolysis sugar yield. Most reported studies focus on the effects of biomass particle size on a specific process; as a result, in the current literature, there is no commonly accepted guidance to select the overall optimum particle size in order to minimize the energy consumption and maximize sugar yield. This study presents a comprehensive experimental investigation converting three types of biomass (big bluestem, wheat straw, and corn stover) into fermentable sugars and studies the effects of biomass particle size throughout the multistep bioconversion. Three particle sizes (4 mm, 2 mm, and 1 mm) were produced by knife milling and were pelletized with an ultrasonic pelleting system. Dilute acid method was applied to pretreat biomass before enzymatic hydrolysis. Results suggested 2 mm is the optimum particle size to minimize energy consumption in size reduction and pelleting and to maximize sugar yield among the three particle sizes for big bluestem and wheat straw biomass. Nevertheless, there is no significant difference in sugar yield for corn stover for the three particle sizes.

Effect of removing hemicellulose and lignin synchronously under mild conditions on enzymatic hydrolysis of corn stover

2020 ◽  
Vol 204 ◽  
pp. 106407 ◽  
Author(s):  
Shengxin An ◽  
Wenzhi Li ◽  
Fengyang Xue ◽  
Xu Li ◽  
Ying Xia ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Corn Stover ◽  
Mild Conditions ◽  
Hydrolysis Of

Effect of Mechanical Pretreatment for Enzymatic Hydrolysis of Woody Residues, Corn Stover and Alfalfa

2019 ◽  
Vol 11 (11) ◽  
pp. 5847-5856 ◽  
Author(s):  
Ju Chen ◽  
Kokou Adjallé ◽  
Thanh Tung Lai ◽  
Simon Barnabé ◽  
Michel Perrier ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Corn Stover ◽  
Mechanical Pretreatment ◽  
Hydrolysis Of

scholarly journals Toward Biochemical Conversion of Lignocellulose On-Farm: Pretreatment and Hydrolysis of Corn Stover in Situ

2017 ◽  
Vol 60 (4) ◽  
pp. 1025-1033
Author(s):  
Alicia A. Modenbach ◽  
Sue E. Nokes ◽  
Michael D. Montross ◽  
Barbara L. Knutson
Keyword(s):  
Enzymatic Hydrolysis ◽  
Corn Stover ◽  
Conversion Efficiency ◽  
High Solids ◽  
Cellulose Conversion ◽  
Biochemical Conversion ◽  
High Solids Loading ◽  
Combined Pretreatment ◽  
Pretreatment Conditions ◽  
On Farm

Abstract. High-solids lignocellulosic pretreatment using NaOH followed by high-solids enzymatic hydrolysis was evaluated for an on-farm biochemical conversion process. Increasing the solids loadings for these processes has the potential for increasing glucose concentrations and downstream ethanol production; however, sequential processing at high-solids loading similar to an on-farm cellulose conversion system has not been studied. This research quantified the effects of high-solids pretreatment with NaOH and subsequent high-solids enzymatic hydrolysis on cellulose conversion. As expected, conversion efficiency was reduced; however, the highest glucose concentration (40.2 g L-1), and therefore the highest potential ethanol concentration, resulted from the high-solids combined pretreatment and hydrolysis. Increasing the enzyme dosage improved cellulose conversion from 9.6% to 36.8% when high-solids loadings were used in both unit operations; however, increasing NaOH loading and pretreatment time did not increase the conversion efficiency. The enzyme-to-substrate ratio had a larger impact on cellulose conversion than the NaOH pretreatment conditions studied, resulting in recommendations for an on-farm bioconversion system. Keywords: Corn stover, Enzymatic hydrolysis, Enzyme loading, High solids, Low solids, Sodium hydroxide.

Stepwise pretreatment of aqueous ammonia and ethylenediamine improve enzymatic hydrolysis of corn stover

2018 ◽  
Vol 124 ◽  
pp. 201-208 ◽  
Author(s):  
Jia-Qing Zhu ◽  
Wen-Chao Li ◽  
Lei Qin ◽  
Xiong Zhao ◽  
Si Chen ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Corn Stover ◽  
Aqueous Ammonia ◽  
Hydrolysis Of
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