RT journal article
T1 Integration of a nitrification bioreactor and an anoxic biotrickling filter for simultaneous ammonium-rich water treatment and biogas desulfurization
A1 Cano, Patricio I.
A1 Almengló Cordero, Fernando
A1 Ramírez Muñoz, Martín
A1 Cantero Moreno, Domingo
A2 Ingeniería Química y Tecnología de Alimentos
K1 Biological desulfurization
K1 Anoxic conditions
K1 Nitrification
K1 Nitrogen removal optimization
K1 Biogas
K1 Nitrate equivalent
AB A preliminary assessment has been carried out on the integration of an anoxic biotrickling filter and a nitrification bioreactor for the simultaneous treatment of ammonium-rich water and H2S contained in a biogas stream. The nutrient consumption in the biotrickling filter was as follows (mol−1 NO3−-N): 6.3·10−4 ± 1.2·10−4 mol PO43−-P, 0.04 ± 0.05 mol NH4+-N and 0.04 ± 0.03 mol K+-K. Furthermore, it was possible to supply a mixture of biogenic NO3− and NO2− into the biotrickling filter from the nitrification bioreactor to obtain a maximum elimination capacity of 152 gH2S–S m−3 h−1. The equivalence between the two compounds was 1 mol NO3−-N equal to 1.6 mol NO2−-N. The biotrickling filter was also operated under a stepped variable inlet load (30–100 gH2S–S m−3 h−1) and outlet H2S concentrations of less than 150 ppmV were obtained. It was also possible to maintain the outlet H2S concentration close to 15 ppmV with a feedback controller by manipulating the feed flow (in the nitrification bioreactor). Two stepped variable inlet loads were tested (60–111 and 16–102 gH2S–S m−3 h−1) under this type of control. The implementation of feedback control could enable the exploitation of biogas in a fuel cell, since the H2S concentrations were 15.1 ± 4.3 and 15.0 ± 3.4 ppmV. Finally, the anoxic biotrickling filter experienced partial denitrification and this implied a loss of the desulfurization effectiveness related to SO42− production. © 2021 The Authors
PB ELSEVIER
SN 0045-6535
YR 2021
FD 2021-07
LK http://hdl.handle.net/10498/25194
UL http://hdl.handle.net/10498/25194
LA eng
NO The Spanish Government ( Ministerio de Economía y Competitividad ) and European FEDER funds provided financial support through the project CTM2012-37927-C03 ‘Monitoring, modelling and control towards the optimization of anoxic and aerobic desulfurizing biotrickling filters’.
DS Repositorio Institucional de la Universidad de Cádiz
RD 08-nov-2026