Abstract
A microprocessor system was developed for data logging and control of product water quality in a continuous ion exchange desalination pilot plant. The format used for the program structure allows dynamic interaction with the system, via interrupts, and is likely to be generally applicable to microprocessor control software. pH and conductivity measurements were used in the calculation of column cycle times. Establishing of trends in the measured parameters, before initiating control action, resulted in a stable system. The control action ensures the minimum consumption of regenerant chemicals which is the single most important factor in the running costs of an ion exchange plant.
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