RT journal article
T1 Kinetic and stoichiometric characterization of anoxic sulfideoxidation by SO-NR mixed cultures from anoxic biotrickling filters.
A1 Mora, Mabel
A1 Fernández, Maikel
A1 Gómez Montes de Oca, José Manuel
A1 Cantero Moreno, Domingo
A1 Lafuente, Javier
A1 Gamisans, Xavier
A1 Gabriel, David
A2 Ingeniería Química y Tecnología de Alimentos
K1 Hydrogen sulfide
K1 Biotrickling filter
K1 SO-NR culture
K1 Kinetics and stoichiometry
K1 Respirometry
K1 Titrimetry
AB Monitoring the biological activity in biotricklingfilters is difficult since it implies estimating biomass concentrationand its growth yield, which can hardly be measured inimmobilized biomass systems. In this study, the characterizationof a sulfide-oxidizing nitrate-reducing biomass obtainedfrom an anoxic biotrickling filter was performed through theapplication of respirometric and titrimetric techniques. Previously,the biomass was maintained in a continuous stirred tankreactor under steady-state conditions resulting in a growthyield of 0.328±0.045 g VSS/g S. To properly assess biologicalactivity in respirometric tests, abiotic assays were conductedto characterize the stripping of CO2 and sulfide. Theglobal mass transfer coefficient for both processes was estimated.Subsequently, different respirometric tests were performed:(1) to solve the stoichiometry related to the autotrophicdenitrification of sulfide using either nitrate or nitrite aselectron acceptors, (2) to evaluate the inhibition caused bynitrite and sulfide on sulfide oxidation, and (3) to propose,calibrate, and validate a kinetic model considering bothelectron acceptors in the overall anoxic biodesulfurizationprocess. The kinetic model considered a Haldane-type equationto describe sulfide and nitrite inhibitions, a non-competitiveinhibition to reflect the effect of sulfide on the elementalsulfur oxidation besides single-step denitrification since nonitrite was produced during the biological assays.
PB Springer
SN 0175-7598
YR 2014
FD 2014-01-01T00:00:00Z
LK http://hdl.handle.net/10498/16298
UL http://hdl.handle.net/10498/16298
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 12-nov-2026