Kinetics of cross-inhibited denitrification of a high load wastewater

dc.date2007
dc.date.accessioned2012-02-25T21:30:11Z
dc.date.available2012-02-25T21:30:11Z
dc.date.issued2012-02-25
dc.description.abstractBatch denitrification of a synthetic saline medium at 37 °C, pH 7.5 was studied. A kinetic expression and an inhibition function which adequately expresses inhibition and cross-inhibition by nitrate and nitrite in denitratation and denitritation steps occurring in high organic and nitrate load wastewater treatment was determined. Denitratation and denitritation rates were measured independently. Monod- and Haldane-type kinetics were used for denitratation and denitritation, respectively. The maximum specific rate, kN O3 = 12.7 mg N O3 -N / g VSS h, and the saturation constant, KSN O3 = 0.47 mg N O3 -N / L were calculated for denitratation. The maximum specific rate, kN O2 = 13.8 mg N O2 -N / g VSS h, the saturation constant KSN O2 = 0.36 mg N O2 -N / L and the inhibition constant KI-N O2 = 906 mg N O2 -N / L were calculated for denitritation. Among other functional forms the Levenspiel inhibition model for denitratation and denitritation kinetics was proposed. The Levenspiel constants were SN O2 -M = 1149.4 mg N O2 -N / L, SN O3 -M = 34.7 mg N O3 -N / L, β1 = 1.578 and β2 = 1.005, respectively. The fitted experimental values show a good representation of the denitrification of effluents with high nitrogen load containing both nitrate and nitrite. Parametric sensitivity analysis show that inhibition functions (fi) and dimensionless constants (βi) greatly affect predicted nitrite and nitrate consumption rates.es
dc.formatPDFes
dc.identifier.citationEnzyme and Microbial Technology, Vol.40, N°6, 1627-1634, 2007es
dc.identifier.doi10.1016/j.enzmictec.2006.11.014es
dc.identifier.urihttps://hdl.handle.net/10925/745
dc.language.isoenes
dc.sourceEnzyme and Microbial Technologyes
dc.subjectDesnitrificaciónes
dc.subjectAguas residualeses
dc.titleKinetics of cross-inhibited denitrification of a high load wastewateres
dc.typeArtículo de Revistaes
uct.carreraIngeniería Civil Ambientales
uct.carreraIngeniería Civil Químicaes
uct.catalogadorFGEes
uct.comunidadRecursos Naturaleses
uct.facultadFacultad de Recursos Naturaleses
uct.indizacionISIes
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