Title:
Optimizing Biogas Desulfurization: Anoxic Biotrickling Filtration with Agricultural Digestate for Enhanced Sulfur Removal Efficiency
Author(s):
Lenis, A., Gonzalez-Cortes, J.J., Ramirez, M., Pinnekamp, J.
Document(s):
Paper
Slide presentation
Abstract:
Biogas is a renewable source of energy that must be treated before it can be used. The most important treatment step is the desulfurization, which is the removal of hydrogen sulfide (H2S) due to its corrosive and toxic properties. Among the desulfurization processes, the biological In order to develop a desulfurization process that is also environmentally friendly, the testing and systematic investigation of the biologically oxidative desulfurization of biogas in a pilot-scale biotrickling filter (BTF) under anoxic conditions was conducted. An alternative oxidative path of H2S, using nitrate (NO3-) or nitrate (NO2-) rather than oxygen from air, was used. During the experimental phase, the ammonia (NH4+) contained naturally in digestate was nitrified before being used as a washing liquid. The digestate was aerated in order to convert NH4+ into NO3- or NO2-. This means that only digestate was also used here as both inoculum and nutrient solution. It was shown that NH4+ was mostly converted to nitrite rather and nitrate. H2S could subsequently be eliminated from the biogas with removal efficiencies (RE) reaching 99%.
Keywords:
biotechnology, gas cleaning, pilot plant, digestate, agricultural biogas plant, bacteria
Topic:
Biomass, Bio-based Products and Bioenergy Integration
Subtopic:
Resource efficient bioeconomy
Event:
32nd European Biomass Conference and Exhibition
Session:
3BO.15.3
Pages:
392 - 398
ISBN:
978-88-89407-24-0
Paper DOI:
10.5071/32ndEUBCE2024-3BO.15.3
Price:
FREE
