The BIOS is an integrated hardware and software system that enables real-time monitoring and control of wastewater treatment operations based on the dynamically changing biological activity occuring in the bioreactor.
It uses a customized feed-forward simulation and control algorithm to determine and adjust the real-time dissolved oxygen set-point and internal recycle flow (IRQ) ratio necessary to meet treatment goals while minimizing energy consumption. With the BIOS, it is possible to realize aeration energy savings of 15% to 40% while improving the removal of ammonia and/or nitrate.
Using the BIOS, a Connecticut WWTP increased nitrogen removal by 32% while decreasing aeration requirements by 19%. (Click here for details)
To complete real time process optimizations, the BIOS uses data from:
- On-line ammonium and nitrate analyzers
- On-line influent or effluent flow meter
- On-line Return Activated Sludge (RAS) and IRQ flow meters
- Measurement of MLVSS and SRT (on-line or manual)
- On-line dissolved oxygen measurement