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
  • Install VFDs on Blowers