Influences of size reduction, hydration, and thermal-assisted hydration pretreatment to increase the biogas production from Napier grass and Napier silage. (July 2021)

• Record Type: Journal Article
• Authors: Jomnonkhaow, Umarin; Sittijunda, Sureewan; Reungsang, Alissara
• Is Part Of: Bioresource technology. Volume 331(2021)
• Publication Date: 2021-07
• Subjects: Energy crop -- Second-generation biomass -- Hydration -- Hydrogenic effluent -- Anaerobic digestion; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.125034
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: An increase in surface area by size reduction resulted in an increase in the MY. Hydration pretreatment using hydrogenic effluent increased the biomass porosity. Thermal-assisted hydration using hydrogenic effluent significantly improved the MY. Recycled hydrogenic effluent for pretreatment of biomass showed promising results. Abstract: Pretreatment 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.