RT journal article
T1 Anoxic biogas biodesulfurization promoting elemental sulfur production in a Continuous Stirred Tank Bioreactor
A1 González Cortés, José Joaquín
A1 Torres Herrera, Sandra
A1 Almengló Cordero, Fernando
A1 Ramírez Muñoz, Martín
A1 Cantero Moreno, Domingo
A2 Ingeniería Química y Tecnología de Alimentos
K1 Biogas
K1 Elemental sulfur
K1 CSTBR
K1 Hydrogen sulfide
K1 Autotrophic denitrification
K1 Feedback control
AB Biological desulfurization of biogas has been extensively studied using biotrickling filters (BTFs). However, the accumulation of elemental sulfur (S0) on the packing material limits the use of this technology. To overcome this issue, the use of a continuous stirred tank bioreactor (CSTBR) under anoxic conditions for biogas desulfurization and S0  production is proposed in the present study. The effect of the main parameters (stirring speed, N/S molar ratio, hydraulic residence time (HRT) and gas residence time (GRT)) on the bioreactor performance was studied. Under an inlet load (IL) of 100 g S-H2S m–3  h–1 and a GRT of 119 s, the CSTBR optimal operating conditions were 60 rpm, N/S molar ratio of 1.1 and a HRT of 42 h, in which a removal efficiency (RE) and S 0 production of 98.6 ± 0.4% and 88% were obtained, respectively. Under a GRT of 41s and an IL of 232 g S-H2S m–3 h–1 the maximum elimination capacity (EC) of 166.0 ± 7.2 g S-H2S m–3 h–1  (RE = 71.7 ± 3.1%) was obtained. A proportional-integral feedback control strategy was successfully applied to the bioreactor operated under a stepped variable IL.
PB Elsevier B.V.
SN 0304-3894
YR 2020
FD 2020-08-30
LK http://hdl.handle.net/10498/29905
UL http://hdl.handle.net/10498/29905
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 05-nov-2026