Water Resource Recovery Facility Saves Time, Reduces Costs and Optimizes Process

The City of Dayton, OH utilizes the YSI IQ SensorNet to lower preventative maintenance, optimize process, meet permits, and save money in the long run.

Jason Tincu explains their use of DO sensors to fine tune aeration needs while using the ammonium sensors to trim back aeration even further. They are able to accomplish this and still completely nitrify the system as intended.

Video Transcription

We've utilized the DO sensors to be able to fine tune our aeration needs.

In addition to that, we've strategically located the ammonia sensors to be able to trim that back even further because we found at times that you can get away from that conventional safety factor of two milligrams per liter everywhere in an aeration basin. And we found locations to where we can actually go below two, and still completely nitrify our system. The ammonia sensor allows us to trim back the air even further.

The SensorNet system has allowed us the flexibility to have lower preventative maintenance demands on sensors due to the cleaning technology. Past sensors within the plant did not have cleaning mechanisms and the SensorNet system incorporates cleaning technology to really reduce the overhead and demand for staff time.

Having the SensorNet system here on site allows us to look at further optimization options up to and including replacement of blowers, the reduction of needed tank volume to meet the current demands. So it's really provided a next level tool for us to make decisions and to further optimize process, meet permit, and save money in the long run.

You don't really have to have outside professional services come in to help you install or even service this system. It's essentially a plug-and-play system. So there's no need to have maintenance contracts and extra contractors available on site to replace sensors and to do maintenance on the system. So it's very operations friendly.

Our receiving stream, the Great Miami River, is under much scrutiny for nutrient management. We anticipate to have some type of nutrient restriction up to and including nitrogen and phosphorus in the near future. And we look to incorporate some type of controls within the SensorNet system to track those parameters.


The IQ SensorNet also eliminates the need to have outside professionals onsite and prevents the City from having costly service contracts.

As the City looks into the future, they anticipate tighter restrictions on their permit in regards to phosphorus and they intend to seamlessly add the YSI Orthophosphate analyzer to their existing IQ SensorNet system

The IQ SensorNet 2020 XT is a modular water quality system for a complete sensor network ideal for various installation needs. The modular system can accept additional sensors easily at any time. This is a powerful system to continuously measure water quality parameters anywhere in a facility for process control.

Immediate benefits include better network visibility and management, early detection of network failures, improved compliance with regulatory targets and cost savings (energy, pump/blower maintenance, labor).

The system is capable of measuring:

  • Dissolved oxygen (optical or electrochemical)
  • pH
  • ORP
  • Conductivity
  • Temperature
  • Turbidity - ultrasonic cleaning
  • TSS (total suspended solids) - ultrasonic cleaning
  • Ammonium
  • Nitrate*
  • Potassium
  • COD (chemical oxygen demand) - ultrasonic cleaning
  • TOC (total organic carbon) - ultrasonic cleaning
  • DOC (dissolved organic carbon share of TOC) - ultrasonic cleaning
  • SAC (spectral absorption coefficient) - ultrasonic cleaning
  • BOD (biochemical oxygen demand) - ultrasonic cleaning

*Chloride can be seen in the menu on the terminal but only the last value. No real-time monitoring and control function when used on the NitraLyt or VARiON sensor as compensation for nitrate.

The entire system accommodates up to 20 sensors for the above listed parameters in any combination. Any sensor can also be changed out at any time without re-wiring if another parameter is needed. Simply change sensors (parameters) and start getting data for the new parameter.


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Additional Blog Posts of Interest:

Biological Nutrient Removal Applications for Monitoring ORP

Wastewater Aeration Control - Energy Costs Savings Examples

Shortcut the Nitrogen Removal Process with UV Sensors

Myths and Realities: Ammonium Based Aeration Control in Wastewater

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