Modern wastewater treatment systems require air in order to maintain biological activity. Often air is also needed to maintain a thoroughly mixed system. Any air introduced beyond what is needed for these two processes is considered excessive and may be eliminated to reduce power consumption.

Modern wastewater treatment systems require air in order to maintain biological activity. Often air is also needed to maintain a thoroughly mixed system. Any air introduced beyond what is needed for these two processes is considered excessive and may be eliminated to reduce power consumption.