RT journal article
T1 Biodesulfurization of landfill biogas by a pilot-scale bioscrubber: Operational limits and microbial analysis
A1 Torres Herrera, Sandra
A1 Palomares Cortés, Javier
A1 González Cortés, José Joaquín
A1 Cubides Páez, D.F.
A1 Gamisans, X.
A1 Cantero Moreno, Domingo
A1 Ramírez Muñoz, Martín
A2 Ingeniería Química y Tecnología de Alimentos
K1 Biodesulfurization
K1 Biogas
K1 Bioscrubber
K1 Pilot-scale
K1 Flocculation
AB Biogas serves as a crucial renewable energy vector to ensure a more sustainable energy future. However, thepresence of hydrogen sulfide (H2S) limits its application in various sectors, emphasizing the importance ofeffective H2S removal techniques for maximizing its potential. In the present study, the limits of a pilot-scalebioscrubber for biogas desulfurization was study in a real scenario. An increase in the superficial liquid velocity resulted in significant improvements in the H2S removal efficiency, increasing from 76 ± 8% (eliminationcapacity of 6.2 ± 0.5 gS-H2S m− 3 h− 1) to 97.7 ± 0.5% (elimination capacity of 8 ± 1 gS-H2S m− 3 h− 1) as thesuperficial liquid velocity increased from 50 ± 3 m h− 1 to 200 ± 8 m h− 1. A USL of 161.4 ± 0.5 m h− 1 was able toachieve outlet H2S concentrations as low as 3 ± 1 ppmv (H2S removal efficiency of 97 ± 1%) for 7 days. Highsuperficial liquid velocity favoured the aerobic H2S oxidation reducing the nitrate demand. The maximum ECreached throughout the operation was 50.8 ± 0.6 gS-H2S m− 3 h− 1 (H2S removal efficiency of 96 ± 1%) and asulfur production of 60%. Studies in batch flocculation experiments showed sulfur removal rates up to 97.6 ±0.9% with a cationic flocculant dose of 75 mg L− 1. Microbial analysis revealed that the predominant genus withsulfo-oxidant capacity during periods of low H2S inlet load was Thioalkalispira-sulfurivermis (61–69%), while inperiods of higher H2S inlet load, family Arcobacteraceae was the most prevalent (11%).
PB Elsevier
SN 1096-0953
YR 2024
FD 2024
LK http://hdl.handle.net/10498/32850
UL http://hdl.handle.net/10498/32850
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 07-nov-2026