Inhibition of enzyme hydrolysis of cellulose by phenols from hydrothermally pretreated sugarcane straw
Journal Article
·
· Enzyme and Microbial Technology
- Purdue University, West Lafayette, IN (United States); Universidade de São Paulo (Brazil); University of Minho, Braga (Portugal); Purdue University
- Indiana University, Bloomington, IN (United States)
- Universidade de São Paulo (Brazil)
- Purdue University, West Lafayette, IN (United States)
Relatively few studies have addressed the characterization of sugarcane straw (SCS) for production of fermentable sugars through enzyme hydrolysis. Straw is a major co-product of the sugarcane harvest in Brazil that has potential to sustainably increase cellulosic feedstocks in Brazil by 50%. Pretreatment of 10% w/v straw with liquid hot water (LHW) at 180°C for 50 min (severity, S of 4.05), solubilizes hemicellulose, preserves glucan, and generates 4.49 g/L soluble phenolic compounds in the resulting liquid. Extracts from washing pretreated solids with excess hot water followed by acetone resulted in 1.10 and 0.83 g/L phenolics, respectively. Here, acetone-derived extracts were more inhibitory and decreased glucose yield for enzyme hydrolysis of Solka Floc (a lignin-free cellulose) by 42%. In comparison, pretreated straw washed with hot water or acetone was readily hydrolyzed to 92% and 97% by cellulase enzyme. Hydrothermally treated SCS has the potential to provide a valuable and added source of fermentable sugars suitable for bioprocessing into biofuels and bioproducts when cellulase enzyme inhibitors are removed after pretreatment.
- Research Organization:
- Purdue Univ., West Lafayette, IN (United States); Purdue University, West Lafayette, IN (United States)
- Sponsoring Organization:
- Fundação de Amparo à Pesquisa do Estado de São Paulo; USDOE
- Grant/Contract Number:
- EE0008256; EE0008910
- OSTI ID:
- 1994479
- Alternate ID(s):
- OSTI ID: 2283509
- Journal Information:
- Enzyme and Microbial Technology, Journal Name: Enzyme and Microbial Technology Vol. 166; ISSN 0141-0229
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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