Benedict R. Schwegler, Terry J. Mah, Xin Yang, and Jaw F. Lee
Proceedings of "Automating to Improve Water Quality", a Water Environment Federation specialty conference, Minneapolis, Minnesota. June 25-28, 1995.
ABSTRACT: Real-time, on-line monitoring of biological activity was evaluated for its usefulness as a process optimization and control tool. Continuous monitoring of anaerobic and anoxic biological activity revealed several opportunities to improve process performance. Specifically, data acquired from biological activity meter (BAM) units suggested a process configuration change to enhance performance by limiting anaerobic phosphate release and optimizing biological denitrification. Periodic control of internal nitrified recycle flows, according to BAM data, maintained effluent nitrate concentration within discharge criteria. Better control has resulted in improved process stability and a reduction in operating costs. Further research and evaluation is ongoing to determine longer term the benefits of on-line process control.
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