Effect of Aeration on Residence Time in Biological Wastewater Treatment
MTMT : 3395435
Megjelenés dátuma : 2018
Folyóirat címe : Pollack Periodica: An International Journal for Engineering and Information Sciences
Évfolyam : 13
Szám : 2
Oldalszám : 97-106
Dokumentum típusa : folyóiratcikk
Kulcsszó : Aeration, Hydrodynamics, Residence time distribution, Multiphase flow, Wastewater treatment, Műszaki tudományok, Műszaki tudományok/Bio-, Környezet- és vegyészmérnöki tudományok
Absztrakt :
Aerobic wastewater treatment requires extensive aeration, which primary function is to provide oxygen to the biomass responsible fordegradation of wastewater constituents. Besides the effective oxygen transfer efficiency aeration is responsible for fluid flow created by bubbles. In this research bubbles were released from plate diffusers and the impact on mixing were analyzed. Various aeration flow rates and initial bubble sizes were calculated. Residence time distributions in each scenario were compared applying numerical tracer study. Outcome of the calculations is that the aeration reduces the theoretical residence time significantly and therefore the traditional sizing methods needs to be revisit in wastewater treatment.
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