Sulfide toxicity kinetics of a uasb reactor

AUTOR(ES)

Paula Jr., D. R., Foresti, E.

FONTE

Brazilian Journal of Chemical Engineering

DATA DE PUBLICAÇÃO

2009-12

RESUMO

The effect of sulfide toxicity on kinetic parameters of anaerobic organic matter removal in a UASB (up-flow anaerobic sludge blanket) reactor is presented. Two lab-scale UASB reactors (10.5 L) were operated continuously during 12 months. The reactors were fed with synthetic wastes prepared daily using glucose, ammonium acetate, methanol and nutrient solution. One of the reactors also received increasing concentrations of sodium sulfide. For both reactors, the flow rate of 16 L.d-1 was held constant throughout the experiment, corresponding to a hydraulic retention time of 15.6 hours. The classic model for non-competitive sulfide inhibition was applied to the experimental data for determining the overall kinetic parameter of specific substrate utilization (q) and the sulfide inhibition coefficient (Ki). The application of the kinetic parameters determined allows prediction of methanogenesis inhibition and thus the adoption of operating parameters to minimize sulfide toxicity in UASB reactors.

Documentos Relacionados

• The bioactivation procedure for increasing the sulphate-reducing bacteria in a UASB reactor
• TiO2-Photocatalyzed degradation of phenol in saline media in an annular reactor: hydrodynamics, lumped kinetics, intermediates, and acute toxicity
• Microbial dynamics during azo dye degradation in a UASB reactor supplied with yeast extract
• UASB reactor startup for the treatment of municipal wastewater followed by advanced oxidation process
• A full-scale UASB reactor for treatment of pig and cattle slaughterhouse wastewater with a high oil and grease content