Valorization of sugarcane bagasse through biofuel and value-added soluble metabolites production: Optimization of alkaline hydrothermal pretreatment

Sugarcane bagasse (SCB) is increasingly considered as a potential source for bioenergy or bulk chemicals production. However, efficient pretreatment techniques need to be developed make full use of its potential. A central composite design was employed evaluate the effect temperature (146.4–213.6 °C), NaOH concentration (0.7–2.3 M) and treatment time (3.2–36.8 min) on hydrothermal SCB. Glucose abundant fermentable sugar released in hydrolysate (4.0 g/L) significantly (p-value < 0.05) affected by concentration. Sugars remaining cellulose, hemicellulose, lignin pretreated fiber were anaerobically co-digested batch thermophilic assays (55 °C). Propionate, one most promising platform chemicals, main metabolite produced (0.5 Both duration methane composition biogas <0.05 0,10 respectively). Defluviitoga, Methanothermobacter genera favored response alkaline at point conditions (180 °C, 1.5 M NaOH, 20 min).