Abstract
A microcomputer-based control and data acquisition system was designed, installed and tested on a cross flow microfiltration pilot plant. The system provided excellent control of temperature (±0.5°C), average transmembrane pressure (±0.03 bar) and cross flow velocity (±0.05 m s −1), which are the most important parameters influencing filtrate flux in cross flow membrane filtration. Other features of the system which proved very useful included automatic back flushing at selected time interval or when the filtrate flux falls below a given value, and different start up methods by attaining the selected cross flow velocity and average transmembrane pressure with different speeds. The continuous acquisition of the principal parameters is useful for a better understanding of cross flow microfiltration and evaluation of different models.
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