@misc{10498/21691,
year = {2019},
month = {7},
url = {http://hdl.handle.net/10498/21691},
abstract = {Biotrickling filters’ control for H2S removal has special challenges because of complexity of
the 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 controller
was tuned by three methods—two based on Ziegler-Nichols’ rules (step-response and maintained
oscillation) 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 of
EBRT considered by feedback control. The tuning method by maintained oscillation shows the lower
errors. The selected controller was a PI, because unstable behavior at the lowest H2S inlet loading
was found under a PID controller. The PI control was able to maintain an outlet H2S concentration of
14.7   0.45 ppmV at three EBRT, studied at 117 s, 92 s and 67 s. Therefore, desulfurized biogas could
be used to feed a fuel cell. Feedforward control enhances BTF performance compared to the system
without control. The maximum outlet H2S concentration was reduced by 26.18%, although sulfur
selectivity did not exceed 55%, as elemental sulfur was the main oxidation product.},
publisher = {MDPI},
keywords = {Anoxic},
keywords = {biogas desulphurization},
keywords = {feedback control},
keywords = {feedforward control},
keywords = {nitrite},
title = {Feedback and Feedforward Control of a Biotrickling Filter for H2S Desulfurization with Nitrite as Electron Acceptor},
doi = {10.3390/app9132669},
author = {Brito, Javier and Almengló Cordero, Fernando and Ramírez Muñoz, Martín and Cantero Moreno, Domingo},
}