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Pretreatment of wheat straw with potassium hydroxide for increasing enzymatic and microbial degradability.
- Source :
-
Bioresource Technology . Jun2015, Vol. 185, p150-157. 8p. - Publication Year :
- 2015
-
Abstract
- The pretreatment of wheat straw with potassium hydroxide (KOH) at ambient temperature (20 °C) was investigated. The pretreatment effects on chemical composition and physical structures, and subsequent enzymatic hydrolysis and anaerobic digestion were evaluated. Wheat straw at 10% total solids (TS) was treated with KOH solution for 24 h at a wide range of KOH loadings from 2% to 50% (w/w dry basis). Higher KOH loading resulted in higher lignin reduction from the straw and chemical oxygen demand (COD) in the resulting black liquor. Maximum lignin reduction of 54.7% was observed at 50% KOH loading. In comparison to untreated straw, specific hydrolysis yields achieved 14.0–92.3% over the range of 2–50% KOH loading, and methane yields increased 16.7–77.5% for KOH loadings of 10–50%, respectively. Accounting for losses during pretreatment, 20% KOH loading resulted in maximum overall reducing sugar yield and methane yield and therefore is the recommended loading for pretreatment under these conditions. [ABSTRACT FROM AUTHOR]
- Subjects :
- *WHEAT straw
*POTASSIUM hydroxide
*ENZYMATIC analysis
*BIODEGRADATION
*HYDROLASES
Subjects
Details
- Language :
- English
- ISSN :
- 09608524
- Volume :
- 185
- Database :
- Academic Search Index
- Journal :
- Bioresource Technology
- Publication Type :
- Academic Journal
- Accession number :
- 102190231
- Full Text :
- https://doi.org/10.1016/j.biortech.2015.02.047