Advanced control systems for nitrogen removal in full-scale water facilities

International Water Association Sustainable Development, Nitrogen, Wastewater

Target Audience

Practitioners, researchers, consultants, control software developers, wastewater & resource recovery managers and operators


This webinar is organised by the IWA Specialist Group (SG) on Instrumentation, Control and Automation (ICA). More information about this SG can be found here.

Advanced control of activated sludge systems enables water companies to meet increasingly stringent water quality demands as well as minimise waste generation and energy consumption. Two main advanced control strategies can be applied for optimising the aeration demand in nutrient removal processes depending on the process structure: (i) optimising dissolved oxygen (DO) set points in continuously-aerated systems, and (ii) optimising aerobic–anoxic cycles in intermittently-aerated systems. Towards this goal, a diverse set of tools is available, such as pH and Oxidation-Reduction Potential (ORP) sensors, ion-selective ammonia sensors, and nitrate sensors.

The objective of this webinar is to give an overview of different advanced control systems for nitrogen removal while identifying the challenges to the systems’ successful implementation.

Learning Objectives

The presentations and discussion in this webinar will equip participants to:

  • Gain an overview of different advanced control systems for nitrogen removal in full-scale Wastewater Treatment Plants/Water Resource Recovery Facilities (WRRFs/WWTPs).
  • Understand the potentials and limitations of these control systems for optimisation of activated sludge systems at full-scale.
  • Explore the benefits and limitations of different sensors type and control structures at different activated sludge system configurations.


Additional Resources

Q&A report: available here.

Webinar presentation slides: available here.

Past IWA webinars:


International Water Association