DOmaster™ is a software program that maintains constant dissolved oxygen
concentration (DO) by matching oxygen demand with oxygen supply in real time. It
does this by controlling blower/compressor output and airflows or pure oxygen flows
to each part of an aeration basin. Its sophisticated control algorithm prevents valve
and blower “hunting”; it also notifies operators about unusual patterns in oxygen
demand and about DO meters and actuators problems.
Unique Features of DOmaster™ Software
- Control algorithms are based on self-calibrated on-line activated sludge and
aerodynamics models.
- Blower control is based on flow demand and valve positions rather than on
pressure.
- Sensor and actuator fault detection algorithms prevent the use of faulty data
and automatically switch the system to “fail-safe” control.
- The controller automatically notifies operators about potential problems and
suggests possible solutions using fuzzy logic methodology combined with
non-parametric statistics.
Domaster™ History
2002: The California Energy Commission selects, from a field of 70 applicants, Ekster
and Associates, Inc.’s proposal to develop universal DO control software.
2003: DOmaster™ is developed.
2004: DOmaster™ is installed at the 32 MGD Oxnard wastewater treatment plant and is
documented to provide a 15 percent energy savings.
