fulltext.study @t Gmail

Co-optimization of sugar yield and input energy by the stepwise reduction of agitation rate during lignocellulose hydrolysis

Paper ID Volume ID Publish Year Pages File Format Full-Text
18997 43041 2015 6 PDF Available
Title
Co-optimization of sugar yield and input energy by the stepwise reduction of agitation rate during lignocellulose hydrolysis
Abstract

•The effect of agitation on enzymatic hydrolysis of corncob was investigated.•Cellulase was obviously deactivated under high agitation rate.•A control strategy with stepwise reduction in agitation rates was proposed.•Optimal strategy yields more glucose than most of continuous agitation.

To ensure effective enzyme transfer and energy saving, the mixing control is a key issue for efficient hydrolysis of lignocellulose at high solid loading. The effect of agitation on enzymatic hydrolysis of pretreated corncob was investigated in this work. Cellulase was obviously deactivated under the agitated condition in the absence of substrate. Increasing from 0 rpm to 150 rpm, high agitation rates increased initial hydrolysis rates and final sugar concentration. However, the excessively high agitation rate at 200 rpm had a significant negative effect on hydrolysis efficiency at the solid loadings from 2% to 15%. Rapid mixing was required only to promote cellulase diffusion within the first 6 h of hydrolysis; afterwards, a smaller mixing energy was required to maintain high hydrolysis efficiency. Based on the hydrolysis rates at different agitation rates, a control strategy with stepwise reduction in agitation rates was proposed. After 72 h of hydrolysis, the glucose yield (54.92 g/L) using the optimal strategy approached that using high-rate continuous agitation (57.34 g/L) at a solid loading of 10% and was greater than those using low-rate continuous agitation. Thus, the stepwise reduction of agitation rate could be beneficial because it could save energy while producing a high sugar concentration, especially for a high solid loading reaction system.

Keywords
SAA, soaking in aqueous ammonia; FPU, filter paper activity; HPLC, high-performance liquid chromatographyEnzymatic hydrolysis; Agitation rate; Cellulase deactivation; Lignocellulose; Sugar yield; Mixing strategy
First Page Preview
Co-optimization of sugar yield and input energy by the stepwise reduction of agitation rate during lignocellulose hydrolysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Food and Bioproducts Processing - Volume 95, July 2015, Pages 1–6
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us