Using high pressure processing (HPP) to pretreat sugarcane bagasse

• Published in: Carbohydrate polymers Vol. 98; no. 1; pp. 1018 - 1024
• Main Authors: Castañón-Rodríguez, J.F., Torrestiana-Sánchez, B., Montero-Lagunes, M., Portilla-Arias, J., Ramírez de León, J.A., Aguilar-Uscanga, M.G.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 15-10-2013; Elsevier
• Subjects: Agronomy. Soil science and plant productions; Applied sciences; Biological and medical sciences; Cellulase - metabolism; cellulose; Cellulose - chemistry; Cellulose - metabolism; Cellulose and derivatives; crystal structure; enzymatic hydrolysis; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; Glucose; hemicellulose; High pressure processing; high pressure treatment; Hydrolysis; lignin; Lignin - chemistry; lignocellulose; Natural polymers; phosphoric acid; Physicochemistry of polymers; Pressure; Pretreatment; Saccharum - chemistry; sodium hydroxide; Sugarcane bagasse; sulfuric acid; Temperature; Use of agricultural and forest wastes. Biomass use, bioconversion; X-ray diffraction; Hydrolysis; Glucose; Pretreatment; High pressure processing; Sugarcane bagasse; Waste treatment; Chemical pretreatment; Saccharification; Lignocellulosics; Crystallinity; Experimental study; High pressure; Structure processing relationship; Sugar cane(by product); Bagasse; Morphology; Enzymatic digestion; Chemical composition; Kinetics; Agricultural waste
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2013.06.068

•High-pressure (HPP) technology was used to modify the composition of sugarcane bagasse.•The effect of pressure, time and temperature was assessed in lignocellulosic fraction.•The effect of HPP on the bagasse structure was evaluated on the enzymatic efficiency.•The removal of lignin (54.10%) was higher with the HPP-NaOH treatment.•Pressure level affected the distribution of crystalline structure of cellulose.
High pressure processing (HPP) technology was used to modify the structural composition of sugarcane bagasse. The effect of pressure (0, 150 and 250MPa), time (5 and 10min) and temperature (25 and 50°C) as well as the addition of phosphoric acid, sulfuric acid and NaOH during the HPP treatment were assessed in terms of compositional analysis of the lignocellulosic fraction, structural changes and crystallinity of the bagasse. The effect of HPP pretreatment on the bagasse structure was also evaluated on the efficiency of the enzymatic hydrolysis of bagasse. Results showed that 68.62 and 45.84% of the hemicellulose fraction was degraded by pretreating at 250MPa with sulfuric and phosphoric acids, respectively. The removal of lignin (54.10%) was higher with the HPP-NaOH treatment. The compacted lignocellulosic structure of the raw bagasse was modified by the HPP treatments and showed few cracks, tiny holes and some fragments flaked off from the surface. Structural changes were higher at 250MPa and 50°C. The X ray diffraction (XRD) patterns of the raw bagasse showed a major diffraction peak of the cellulose crystallographic 2θ planes ranging between 22 and 23°. The distribution of the crystalline structure of cellulose was affected by increasing the pressure level. The HPP treatment combined with NaOH 2% led to the higher glucose yield (25g/L) compared to the combination of HPP with water and acids (>5g/L). Results from this work suggest that HPP technology may be used to pretreat sugarcane bagasse.