Wei-Chen Chen and Jung-Jeng Su

Dept. of Animal Science and Technology, National Taiwan University, Taipei 10673, Taiwan, R.O.C. Bioenergy Research Centre, College of Bio-resources and Agriculture, National Taiwan University, Taipei 10617, Taiwan, R.O.C.

The objective of this project is to integrate a farm-scale bio-desulfurization facility with a novel biogas hollow fibre adsorption module for biogas desulfurization and bio-natural gas production. In this study, the desulfurization experimental results showed that the bio-desulfurization system can remove 96.7 ± 6% of H₂S from the biogas after an approximately two-month enrichment period. The average CH₄, N₂, and CO₂ concentrations in raw biogas were 63.4, 15.2, and 21.1%, respectively. As for biogas upgrading experiments, the inlet biogas flow rates were applied from 5 to 20 L/min. The removal efficiency of CO₂ under all biogas flow rates was 100%. Meanwhile, methane was promoted from 60% to nearly 94% (i.e. 57% increase in methane concentration). The replacement of anthracite and coking coal by upgraded biogas might reduce 44.4% and 42.5% of CO₂ equivalent, respectively. The achievement of this project pursues the mitigation of carbon dioxide emissions by using upgraded pig biogas which can be enlarged and extended to all decentralized pig farms worldwide.

Livestock biogas, Bio-desulfurization, Biogas upgrading, Bio-natural gas.

We thank Fang-Ching Chang and Phil Pan (staff of Aura Material Inc., Hsinchu, Taiwan) for their practical technical assistance on-site during the hollow fibre adsorption experiments. Special thanks to Wen-Teng Hsu (the owner of the I-Yang Pig Farm) and Le-Ting Huang for providing the demonstration site and sample analysis, respectively.

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