The fluid mixing process is a common supportive phenomenon that often occurs in large number of industrial systems. This the subject many numerical and experimental analysis. effectiveness depends on: tank construction, phases viscosity, temperature, density liquids and, what crucial, impeller shape. optimal design geometry still an open issue. In this research work, main objective investigatio...

Lipase-catalyzed production of palm esters by alcoholysis of palm oil with oleyl alcohol in n-hexane was performed in 2L stirred-tank reactor (STR). Investigation on the performance of reactor operation was carried out in batch mode STR with single impeller mounted on the centrally located shaft. Rushton turbine (RT) impellers provide the highest reaction yield (95.8%) at lower agitation speed ...

Two-Color Laser Induced Fluorescence (LIF) Technique enables the measurement of the progress in mixing on macroand microscale simultaneously. This is done by injecting a mixture of an inert and a reacting fluorescent dye into the vessel. The inert dye serves as a tracer for the macromixing but does not predicate the mixing quality on the nano scale. Since the chemical reaction requires mixing o...

Power input is an important engineering and scale-up/down criterion in stirred bioreactors. However, reliably measuring power input in laboratory-scale systems is still challenging. Even though torque measurements have proven to be suitable in pilot scale systems, sensor accuracy, resolution, and errors from relatively high levels of friction inside bearings can become limiting factors at small...

Please cite this article in press as: Nyborg, H. 10.1016/j.paid.2012.03.010 The interview covers Rushton’s background in England, South Africa, and Canada, his education at the University of London (B.Sc., 1970; Ph.D., 1973), and his early research (1970–1980) on the social learning of generosity in 7to 11-year olds. In his first book, Altruism, socialization, and society (1980), Rushton solved...

Inadequate design and improper mixing operation in anaerobic digesters often lead to poor mixing and digester failures due to the presence of dead zones formed in the digester. More research is required to understand the mixing phenomena in anaerobic digesters and thus improve their efficiency. This paper investigates the efficiency of mixing of digester sludge in a mechanically agitated vessel...