β Scribed by E.J. Farley; D.A. White
No coin nor oath required. For personal study only.
Cyclical stop-start operation as a method of increasing permeate production and lo,wering energy requirements is discussed. It is thought that the removal of the applied pressure allows the reversible fouling, such as concentration polarisation, to dissipate. A model to simulate inte~tt~nt operation is developed and optimised with respect to optimising the permeate production. The model was used to simulate a theoretical optimised run and the results compared to those obtained from experiment. The experiments were performed with adiiute suspension of magnesium hydroxide and a range of cross-flow velocities. The experimental results were in good agreement with those calculated from the theoretical model. The use of intermittent operation showed permeate production increases in the order of 200% when compared to the permeate production of a steady flow run. Energy savings of more than 50% are also reported when using intermittent operation.
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The performance of spiral-wound (SPW) modules can be improved by optimising some key geometrical parameters for given operating conditions. To this effect, a computer simulation program, which takes into account the spiral geometry of the module as well as the main physical phenomena occurring insid
In the present work non-supported microfiltration ceramic membranes have been made from different aluminosilicate paste formulations. The cast green dopes were sintered at temperatures between 1100 and 1400 β’ C. The membrane characterisation was made by scanning electron microscopy (SEM), mercury po