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An industrial level system with nonisothermal simultaneous solid state saccharification, fermentation and separation for ethanol production

Paper ID Volume ID Publish Year Pages File Format Full-Text
3394 168 2013 6 PDF Available
Title
An industrial level system with nonisothermal simultaneous solid state saccharification, fermentation and separation for ethanol production
Abstract

To alleviate the problems of low substrate loading, nonisothermal, end-product inhibition of ethanol during the simultaneous saccharification and fermentation, a nonisothermal simultaneous solid state saccharification, fermentation, and separation (NSSSFS) process was investigated; one novel pilot scale nonisothermal simultaneous solid state enzymatic saccharification and fermentation coupled with CO2 gas stripping loop system was invented and tested. The optimal pretreatment condition of steam-explosion was 1.5 MPa for 5 min in industrial level. In the NSSSFS, enzymatic saccharification and fermentation proceeded at around 50 °C and 37 °C, respectively, and were coupled together by the hydrolyzate loop; glucose from enzymatic saccharification was timely consumed by yeast, and the formed ethanol was separated online by CO2 gas stripping coupled with adsorption of activated carbon; the solids substrate loading reached 25%; ethanol yields from 18.96% to 30.29% were obtained in fermentation depending on the materials tested. Based on the pilot level of 300 L fermenter, a novel industrial-level of 110 m3 solid state enzymatic saccharification, fermentation and ethanol separation plant had been successfully established and operated. The NSSSFS was a novel and feasible engineering solution to the inherent problems of simultaneous saccharification and fermentation, which would be used in large scale and in industrial production of ethanol.

► Solid state enzymolysis, fermentation and separation were integrated into one system. ► The steam explosion vessel of 5 m3 was applied to the industrial production of ethanol. ► The NSSSFS equipment had been scaled up to 110 m3 and operated successfully.

Keywords
SSF, simultaneous saccharification and fermentation; SSSF, semi-simultaneous saccharification and fermentation; NSSSFS, nonisothermal simultaneous solid state saccharification, fermentation and separation; SECE, steam-exploded corn straw; SE, steam explos
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An industrial level system with nonisothermal simultaneous solid state saccharification, fermentation and separation for ethanol production
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 74, 15 May 2013, Pages 121–126
Authors
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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