Water Resource Recovery Facilities (WRRF) are moving towards continuous process monitoring and automation to improve their sewage treatment. 
A variety of control strategies, varying in levels of complexity, are currently utilized for process control in wastewater applications. The primary incentives for the control and automation of wastewater treatment plants are compliance with effluent standards and cost reduction.
The SlideShare deck below covers the YSI IQ SensorNet continuous monitoring and control products with its modular capabilities, UltraClean ultrasonic cleaning, and state-of-the-art sensor technologies.
Additional Blog Posts of Interest:
Myths and Realities: Ammonium Based Aeration Control in Wastewater
Wastewater Aeration Control - Energy Costs Savings Examples
What's Next for Water Quality Sensor Trends in Wastewater?
Shortcut the Nitrogen Removal Process in Wastewater with UV Sensors