Advancing Energy Recovery from Sugarcane Leaf via Two-Stage Anaerobic Digestion for Hydrogen and Methane Production: Impacts on Greenhouse Gas Mitigation and Sustainable Energy Production

Prawat Sukphun, Chaweewan Ponuansri, Worapong Wongarmat, Sureewan Sittijunda, Kanathip Promnuan and Alissara Reungsang ()
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Prawat Sukphun: Department of Biotechnology, Faculty of Technology, Khon Kaen University, Khon Kaen 40002, Thailand
Chaweewan Ponuansri: Research Group for Development of Microbial Hydrogen Production Process from Biomass, Khon Kaen University, Khon Kaen 40002, Thailand
Worapong Wongarmat: Research Group for Development of Microbial Hydrogen Production Process from Biomass, Khon Kaen University, Khon Kaen 40002, Thailand
Sureewan Sittijunda: Faculty of Environment and Resource Studies, Mahidol University, Nakhon Pathom 73170, Thailand
Kanathip Promnuan: Research Group for Development of Microbial Hydrogen Production Process from Biomass, Khon Kaen University, Khon Kaen 40002, Thailand
Alissara Reungsang: Department of Biotechnology, Faculty of Technology, Khon Kaen University, Khon Kaen 40002, Thailand

Energies, 2023, vol. 16, issue 23, 1-15

Abstract: This study aims to enhance energy recovery from sugarcane leaf (SCL) through two-stage anaerobic digestion (TSAD) for hydrogen and methane production. The influence of hydraulic retention time (HRT) on this process was investigated. Optimal conditions established through batch experiments (5% total solids (TS) ( w / v ) and rice straw compost inoculum) were applied in semi-continuous stirred tank reactors (CSTR-H 2 and CSTR-CH 4 ). Remarkably, the highest production rates were achieved with HRTs of 5 days for CSTR-H 2 (60.1 mL-H 2 /L·d) and 25 days for CSTR-CH 4 (238.6 mL-CH 4 /L·d). Microbiological analysis by 16s rRNA sequencing identified Bacillus as predominant in CSTR-H 2 followed by Lactobacillus and Clostridium. Utilizing SCL for TSAD could reduce greenhouse gas (GHG) emissions by 2.88 Mt-CO 2 eq/year, compared to open-field burning, and mitigate emissions from fossil-fuel-based power plants by 228 kt-CO 2 eq/year. This research underscores the potential of TSAD for efficient energy recovery and significant GHG emission reductions.

Keywords: biohythane; biomass; renewable energy; anaerobic digestion (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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