An accelerated approach of biogas production through a two-stage BioH2/CH4 continuous anaerobic digestion system from Napier grass. (October 2022)

• Record Type: Journal Article
• Authors: Pomdaeng, Prakaidao; Chu, Chen-Yeon; Sripraphaa, Kobsak; Sintuya, Hathaithip
• Is Part Of: Bioresource technology. Volume 361(2022)
• Publication Date: 2022-10
• Subjects: Napier grass -- Hydrogen -- Methane -- Two-stage continuous bioreactor; 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.2022.127709
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Hydrogen-rich biogas 20% was produced in the first reactor of the two-stage system. The two-stage biohythane production system was achieved high efficiency. The energy yields of single and two-stage systems were 13.14 and 10.10 kJ/g vS respectively. The total bioenergy recovery in two-stage system was 30% higher than the single-stage system. Abstract: Napier grass found to be greatest potential for gaseous bioenergy production. The biohydrogen and biomethane productions from untreated Napier grass in single and two-stage continuous bioreactors was evaluated using anaerobic digestion technology. The bioreactors were fed Napier grass with organic loading rate (OLR) of 0.5, 1.0 and 2.0 kg VS/m 3 -d, respectively. The hydrogen, methane, and energy yields were evaluated. The methane yield of single-stage system was 282.08 CH4 /g vS with OLR of 0.5 kg VS/m 3 -d. For two-stage system, the biohydrogen and biomethane yields were 90.06 mL H2 /g vS and 367.00 mL CH4 /g vS with OLRs of 1.0 and 0.5 kg VS/m 3 -d, respectively. The energy yields of single and two-stage systems were 13.14 and 10.10 kJ/g vS respectively. The peak OLR of Napier grass was 0.5 kg VS/m 3 -d for the two-stage system whereas the total energy recovery was 30 % higher than the single-stage system.