Use Less Energy by Injecting Pure Oxygen Instead of Blowing Air in to Aerate
Pure oxygen carries more O2 than air (air is ~21% O2)
Oxygen being pumped into the basin should use the same amount of energy while adding more O2 than air
It is important to consider the cost of oxygen for the facility
Replace Coarse Bubble Diffusers with Finer Bubble Diffusers
If coarse bubbles are not needed (they usually are for water that has a lot of solids in it) the fine bubbles transfer more oxygen due to the surface area difference
It is possible to achieve this by just purchasing different membranes (depending on the blowers they have)
It is important to always check the amount of solids the water has before recommending fine bubbles
Install Dissolved Oxygen Probes
It is common for facilities to just do occasional testing for dissolved oxygen--this can often lead to over or under aeration
Water can only hold ~7 mg/L of oxygen at full saturation
Usually, the wastewater does not need to be saturated
The probes can make it easier for the facility to take measurements, therefore they could take them more often
They can hook the probes up to computers to do continuous monitoring that they can see in real time
Install Automatic Dissolved Oxygen Controls
Automatic controls could be set to monitor the levels based on what the facility wants
This would reduce the need to take samples and/or consistently watch the levels themselves
Overall Aeration
Use Less Energy by Injecting Pure Oxygen Instead of Blowing Air in to Aerate
Replace Coarse Bubble Diffusers with Finer Bubble Diffusers
Dissolved Oxygen Controls
Install Dissolved Oxygen Probes
Install Automatic Dissolved Oxygen Controls
Motor Control
Install a Dewatering Screw Press to Replace a Centrifuge Dewaterer