Operation of Advanced Instrumentation to Support Enhanced Nutrient Removal

Authors:

  • P.Yi, W. Khunjar, K. Bilyk, R. Latimer, P. Pitt - Hazen and Sawyer
  • C. Bott - Hampton Roads Sanitation District
  • M. O’Shaughnessy - Prince William County Service Authority

A sample BNR basin schematic with current and alternative sensor locations.

Analytical devices (sensors) comprise an integral component of wastewater treatment systems as they can allow automation of data collection, thereby freeing up resources for other tasks and allowing these data to be used for both manual and automatic control of facilities and processes. Interest in the application of sensors within the water industry has peaked in recent years with much emphasis on process control and optimization to minimize energy and chemical use while maximizing system performance. Use of sensors to meet stringent nutrient discharge limits is of high interest. Despite fairly widespread deployment for nutrient removal, little guidance exists to help utilities apply sensors to solve specific nutrient removal challenges. Compounding this issue is the lack of technical knowledge that exists regarding operation and maintenance of sensors outside what is provided by manufacturers. This lack of knowledge leads to distrust of sensor data, which is manifested in non-optimal operation of existing infrastructure. Better understanding of instrumentation equipment, control strategies, installation design and on-going maintenance requirements will benefit the speed and success of implementation. This paper will provide a summary of experiences from the Mid-Atlantic region to address these limitations.

For more information, contact the author at pyi@hazenandsawyer.com.

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Horizons Fall 2017 (pdf)

Horizons showcases significant water, wastewater, reuse, and stormwater projects and innovations that help our clients to achieve their goals, and can help you achieve yours. Articles are written by top engineers and process group leaders, demonstrating and explaining the beneficial application of a variety of technologies and tools.

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