Oxygen transfer and energy dissipation rate in surface aerator.
The dissipation rate of turbulent kinetic energy (epsilon) is a key parameter for mixing in surface aerators. In particular, determination epsilon across the impeller stream, where the most intensive mixing takes place, is essential to ascertain that an appropriate degree of mixing is achieved. Present work by using commercial software VisiMix calculates the energy dissipation rate in geometrically similar unbaffled surface aeration systems in order to scale-up the oxygen transfer process. It is found that in geometrically similar system, oxygen transfer rate is uniquely correlated with dissipation rate of energy. Simulation or scale-up equation governing oxygen transfer rate and dissipation rate of energy has been developed in the present work.
Kumar
Bimlesh
B
Department of Civil Engineering, Indian Institute of Science, Bangalore 560 012, India. bimlesh.iisc@gmail.com
Rao
Achanta Ramakrishna
AR
D000388:Air; D001420:Bacteria, Aerobic / Q000502:physiology*; D019149:Bioreactors / Q000382:microbiology*; D003198:Computer Simulation; D017076:Computer-Aided Design; D004735:Energy Transfer / Q000502:physiology*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008954:Models, Biological; D010100:Oxygen / Q000737:chemistry* / Q000378:metabolism*; D015203:Reproducibility of Results; D012212:Rheology / Q000379:methods; D012680:Sensitivity and Specificity
D010100:Oxygen