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Biorefinery of sweet sorghum stem

Paper ID Volume ID Publish Year Pages File Format Full-Text
14308 1208 2012 6 PDF Available
Title
Biorefinery of sweet sorghum stem
Abstract

Sweet sorghum has been considered as a viable energy crop for alcohol fuel production. This review discloses a novel approach for the biorefining of sweet sorghum stem to produce multiple valuable products, such as ethanol, butanol and wood plastic composites. Sweet sorghum stem has a high concentration of soluble sugars in its juice, which can be fermented to produce ethanol by Saccharomyces cerevisiae. In order to obtain high ethanol yield and fermentation rates, concentrated juice with an initial total sugar concentration of 300 g L− 1 was fermented. The maximum ethanol concentration after 54 h reached 140 g L− 1 with a yield of 0.49 g ethanol per g consumed sugar, which is 97% of the theoretical value. Sweet sorghum bagasse, obtained from juice squeezing, was pretreated by acetic acid to hydrolyze 80–90% of the contained hemicelluloses. Using this hydrolysate as raw material (total sugar 55 g L− 1), 19.21 g L− 1 total solvent (butanol 9.34 g, ethanol 2.5 g, and acetone 7.36 g) was produced by Clostridium acetobutylicum. The residual bagasse after pretreatment was extruded with PLA in a twin-screw extruder to produce a final product having a PLA: fiber ratio of 2:1, a tensile strength of 49.5 M and a flexible strength of 65 MPa. This product has potential use for applications where truly biodegradable materials are required. This strategy for sustainability is crucial for the industrialization of biofuels from sweet sorghum.

Keywords
Sweet sorghum; Ethanol; Biobutanol; Wood plastic composites
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biotechnology Advances - Volume 30, Issue 4, July–August 2012, Pages 811–816
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