Impact of Chemical and Physical Pretreatment on Methane Potential of Peanut Shells

The request for alternative sources of energy has led to evaluating untapped routes production, such as using abundant and low-cost waste materials, e.g., lignocellulosic wastes, the substrate biological processes aimed at biofuel production. This study focused on peanut shells (PS) valorisation via anaerobic digestion (AD). Two emerging pretreatments, i.e., organosolv ultrasounds, were investigated unlock full AD potential PS. impact a substrate-to-solvent ratio in pretreatment was (i.e., 1:5 vs. 1:10 1:20). Different exposure times tested ultrasound pretreatment, corresponding applied densities 30,000, 12,000, 6000 kJ/kg VS, respectively. Organosolv achieved maximal polyphenol solubilisation, 4.90 mg/g TS, when increasing ratio, whereas methane production did not benefit from being comparable with that raw PS most 55.0 mL CH4/g VS). On other hand, ultrasounds mainly affected sugar solubilisation (up 37.90 TS), enhancing up an extra 64%, highest density. route would further downstream steps recover biomolecules released liquid fraction, provided slurry suitable direct AD.