کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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678785 | 888669 | 2008 | 6 صفحه PDF | دانلود رایگان |
In these studies, alkaline peroxide pretreatment of wheat straw was investigated. Pretreated wheat straw was hydrolyzed using cellulolytic and xylanolytic enzymes, and the hydrolysate was used to produce butanol using Clostridium beijerinckii P260. The culture produced less than 2.59 g L−1 acetone–butanol–ethanol (ABE) from alkaline peroxide wheat straw hydrolysate (APWSH) that had not been treated to reduce salt concentration (a neutralization product). However, fermentation was successful after inhibitors (salts) were removed from the hydrolysate by electrodialysis. A control glucose fermentation resulted in the production of 21.37 g L−1 ABE, while salt removed APWSH resulted in the production of 22.17 g L−1 ABE. In the two fermentations, reactor productivities were 0.30 and 0.55 g L−1 h−1, respectively. A comparison of use of different substrates (corn fiber, wheat straw) and different pretreatment techniques (dilute sulfuric acid, alkaline peroxide) suggests that generation of inhibitors is substrate and pretreatment specific.
Journal: Biomass and Bioenergy - Volume 32, Issue 12, December 2008, Pages 1353–1358