CAMix directs air to one or more zones at a time, both mixing and aerating the individual zones sequentially. Air is provided from a centralized air supply or dedicated blower. The aeration valve module (AVM) and controller direct air to discrete zones based on operator selectable parameters. Instrumentation feedback can be used to automatically adjust parameters. Operation can be set to provide continuous complete tank mixing, partial mixing, or extended quiescent conditions in discrete zones or tanks.