Solutions to optimize energy consumption of airblowers by monitoring oxygen levels in the bioreactor

The paper deals with the analysis of energy consumption and power quality in wastewater treatment plants, during the operation of air blowers optimized for monitoring the level of oxygen in the bioreactor. The airblowers´ consumption is over 68% in energy consumption of wastewater treatment plant. This consumption optimization was done using sensors of the level of oxygen in the bioreactor that partial closure for command of airblowers, maintaining oxygen levels between 1.5 and 2.5%. By closing the discharge of airblowers it reduce the air flow, the rotation frequency of airblower and its consumption. The current absorbed during the operation of these airblowers shows important harmonics.