masterThesis
Uso de tubos de Venturi na aeração de um reator de leito móvel aplicado na remoção de matéria orgânica e nitrogênio
Fecha
2019-04-18Registro en:
NONAKA, Fernanda Martins. Uso de tubos de Venturi na aeração de um reator de leito móvel aplicado na remoção de matéria orgânica e nitrogênio. 2019. 92 f. Dissertação (Mestrado em Engenharia Ambiental) - Universidade Tecnológica Federal do Paraná, Londrina, 2019.
Autor
Nonaka, Fernanda Martins
Resumen
The main objective of this work was to evaluate the effect of use of the Venturi tubes on the aeration a mobile bed reactor with immobilized biomass and semi-continuous flow, operating under intermittent aeration, to remove nitrogen and carbon from an effluent from a University Restaurant. The reactor was built in a polyethylene water tank with a capacity of 500L. The support medium used to fix the microorganisms was Biobobs® arranged in a mobile form and occupying about 12% of the reactor. The periods of aeration and non-aeration were 3 hours and 1 hour, respectively. As a result, it was adopted the use of 3 Venturis tubes in the System, which presented KLa of 16,31 h-1, oxygen transfer rate of 62,86 gO2h-1, power consumption of 0,048 kW and Oxygen Efficiency of 1,319 kgO2kWh-1. It was also observed that the best operational condition was with HRT of 1.67 d, which showed a TN removal efficiency of 72% and a COD removal of 97%. On the other hand, when the system was operated with HRT of 2.5d and 5d, it presented lower TN removal efficiencies, in the values of 43% and 54%, respectively. Regarding the removal of COD, the efficiencies with HRT of 2.5d and 5d were 77% and 84% respectively, indicating an effective carbon removal even with higher HRT. There was no significant presence of biomass in the effluent, indicating that the biomass remained immobilized to the support medium.