Automation – building a foundation and looking to the future: PRESENTATION ONLY

Andy Thornton, & Richard Addison,  Hach, UK


Aeration blower control
Fixed dissolved oxygen set point control

  • Currently the most commonly used control system. 2 controllers connected in cascade
  • Outer loop calculates the required airflow from the difference between the desired DO and the online concentration
  • The airflow setpoint is controlled by the inner loop that changes the position of the air valve.

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