PH-Optimized Biomethane Production: Evaluating Carrier Materials for Ex-situ Biomethanation
CONECT 2024: XVII International Scientific Conference of Environmental and Climate Technologies: Book of Abstracts 2024
Zane Kušnere, Lauma Laipniece, Krišs Spalviņš

Choosing the appropriate carrier material for ex-situ biomethanation is a critical factor to consider when developing biogas upgrading technologies. The chosen material for biomethanation in a biotrickling filter reactor functions as a substrate that immobilises microorganisms, which act as catalysts in the reaction for producing biomethane. This study conducted experiments on waste-derived materials, including glass foam and vulcanised wood ash material, in addition to polyurethane foam and expanded clay pellets. Pretreratment of wood ash was done to lower the pH of material. The manometric test measured the rate of CH4 generation by quantifying pressure fluctuations. The validity of these results was confirmed by analysing product gas samples using a Shimadzu Nexis GC-2030 gas chromatograph, which was equipped with two parallel lines, a flame ionisation detector (FID) and a thermal conductivity detector (TCD). In order to enhance the biomethane concentration in the end product, two strains of Methanobacterium alcaliphilum were evaluated alongside biogas sludge as the inoculum. These strains of microorganisms are methanogens that utilise hydrogen and can thrive in a high pH environment. Thus, they have the potential to demonstrate improved biomethane production outcomes when a vulcanised wood ash filter is used as the carrier material.


Atslēgas vārdi
Biomethanation; biogas upgrading; carrier material; gas chromatography; methanobacterium alcaliphilum; vulcanized wood ash
DOI
10.7250/CONECT.2024.056
Hipersaite
https://ect-journals.rtu.lv/conect/article/view/CONECT.2024.056

Kušnere, Z., Laipniece, L., Spalviņš, K. PH-Optimized Biomethane Production: Evaluating Carrier Materials for Ex-situ Biomethanation. No: CONECT 2024: XVII International Scientific Conference of Environmental and Climate Technologies: Book of Abstracts, Latvija, Riga, 15.-17. maijs, 2024. Riga: Riga Technical University, 2024, 1.-1.lpp. ISBN 978-9934-37-065-6. ISSN 2592-9704. Pieejams: doi:10.7250/CONECT.2024.056

Publikācijas valoda
English (en)
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