Wastewater treatment monitoring and process control with infrared sensors

Trey B. Daunis; Bach Le; Jennifer C. Dussor; Kevin P. Clark; Dennis I. Robbins; Katy Roodenko

doi:10.1117/12.2655472

6 March 2023 Wastewater treatment monitoring and process control with infrared sensors

Trey B. Daunis, Bach Le, Jennifer C. Dussor, Kevin P. Clark, Dennis I. Robbins, Katy Roodenko

Proceedings Volume PC12372, Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXIII; PC123720G (2023) https://doi.org/10.1117/12.2655472
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

We report on development of a novel type of sensor for in-line analysis of nitrogen-based molecules, such as nitrate, nitrite and ammonia, in municipal wastewater. The sensor utilizes pre-concentration of analytes with ion-selective materials and subsequent optical detection in the mid-infrared spectral range. Advantages of this sensor include in-line autonomous measurements, self-calibration mechanisms and high selectivity to different nitrogen species. The sensor targets implementation at wastewater treatment plants (WWTPs) to enable control and optimization of the aeration process, thereby reducing energy consumption and cost. We will discuss challenges encountered during the transition of the technology from the lab bench to WWTPs, including operational efficiency of the optical sources, such as quantum cascade lasers (QCLs) vs. thermal sources. Extension of the sensor capabilities for sensing of additional contaminants and for bioreactor systems control will be discussed.

Conference Presentation

Citation Download Citation

Trey B. Daunis, Bach Le, Jennifer C. Dussor, Kevin P. Clark, Dennis I. Robbins, and Katy Roodenko "Wastewater treatment monitoring and process control with infrared sensors", Proc. SPIE PC12372, Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXIII, PC123720G (6 March 2023); https://doi.org/10.1117/12.2655472

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KEYWORDS

Infrared sensors

Sensors

Process control

Thermography

Absorption

Control systems

Infrared radiation

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