RT journal article
T1 Feedback and Feedforward Control of a Biotrickling Filter for H2S Desulfurization with Nitrite as Electron Acceptor
A1 Brito, Javier
A1 Almengló Cordero, Fernando
A1 Ramírez Muñoz, Martín
A1 Cantero Moreno, Domingo
A2 Ingeniería Química y Tecnología de Alimentos
K1 Anoxic
K1 biogas desulphurization
K1 feedback control
K1 feedforward control
K1 nitrite
AB Biotrickling filters’ control for H2S removal has special challenges because of complexity ofthe systems. Feedback and feedforward control were implemented in an anoxic biotrickling filter,operated in co-current flow mode and using nitrite as an electron acceptor. The feedback controllerwas tuned by three methods—two based on Ziegler-Nichols’ rules (step-response and maintainedoscillation) and the third using the Approximate M-constrained Integral Gain Optimization (AMIGO).Inlet H2S staircase step perturbations were studied using a feedforward control and the e ect ofEBRT considered by feedback control. The tuning method by maintained oscillation shows the lowererrors. The selected controller was a PI, because unstable behavior at the lowest H2S inlet loadingwas found under a PID controller. The PI control was able to maintain an outlet H2S concentration of14.7   0.45 ppmV at three EBRT, studied at 117 s, 92 s and 67 s. Therefore, desulfurized biogas couldbe used to feed a fuel cell. Feedforward control enhances BTF performance compared to the systemwithout control. The maximum outlet H2S concentration was reduced by 26.18%, although sulfurselectivity did not exceed 55%, as elemental sulfur was the main oxidation product.
PB MDPI
SN 2076-3417
YR 2019
FD 2019-07
LK http://hdl.handle.net/10498/21691
UL http://hdl.handle.net/10498/21691
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 07-nov-2026