Umarin JomnonkhaowSureewan SittijundaAlissara ReungsangFaculty of Environment and Resource Studies, Mahidol UniversityKhon Kaen UniversityAcademy of Science2022-08-042022-08-042021-07-01Bioresource Technology. Vol.331, (2021)18732976096085242-s2.0-85104930654https://repository.li.mahidol.ac.th/handle/123456789/76520Pretreatment of lignocellulose materials prior to biogas production is required to minimize biomass recalcitrance and increase biomass digestibility. In this study, the effects of particle size reduction, hydration, and thermal-assisted hydration on Napier grass and silage for methane production were evaluated. Compared to the 4.75-mm particle size Napier grass and silage, 0.425-mm Napier grass and silage showed 72% and 46% increases in methane yield, respectively, whereas hydration pretreatment using hydrogenic effluent increased the methane yields from Napier grass and silage by 23% and 56%, respectively. Superior effects were observed when Napier grass and silage were pretreated with thermal-assisted hydration using hydrogenic effluent for 60 and 15 min, respectively, resulting in methane yields of 385 and 331 mL CH4/g substrateadded. The results indicate that size reduction accompanied by thermal-assisted hydration using hydrogenic effluent as a hydration medium significantly improved the biodegradability of Napier grass and silage.Mahidol UniversityChemical EngineeringEnergyEnvironmental ScienceArticleSCOPUS10.1016/j.biortech.2021.125034