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An accelerated approach of biogas production through a two-stage BioH2/CH4 continuous anaerobic digestion system from Napier grass by Prakaidao Pomdaeng; Chen-Yeon Chu; Kobsak Sripraphaa; Hathaithip Sintuya is a Engineering article available to read on EtoBox.

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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/m3-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/m3-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/m3-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/m3-d for the two-stage system whereas the total energy recovery was 30 % higher than the single-stage system.

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Author

Prakaidao Pomdaeng; Chen-Yeon Chu; Kobsak Sripraphaa; Hathaithip Sintuya

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)