The Aerobic Stage in AAO Process: How It Works & Essential Equipment | Juntai Water Solutions

What is the Aerobic Stage in AAO Process?

The aerobic stage is the third phase of the Anaerobic-Anoxic-Oxic (AAO) process, where microorganisms break down organic matter and convert ammonia into nitrate using dissolved oxygen. This step is vital for achieving high-quality effluent.

Key Steps in the Aerobic Stage

1. Oxygen Supply
   Disc Diffusers inject fine bubbles to maintain 2-4 mg/L DO levels.
   
   

2. Biofilm Growth
   Mbbr Carriers provide surface area for microbial attachment, enhancing treatment capacity.
   
   

3. Nitrification
   Nitrosomonas and Nitrobacter convert NH₃ to NO₃⁻ under aerobic conditions.
   
   

Essential Equipment for Aerobic Treatment

1. Mbbr Media

• Role: Increases active biomass by 5-10x compared to conventional activated sludge.

2. Fine Bubble Disc Diffusers

• Role: Achieves 85%+ oxygen transfer efficiency for energy savings.

3. Tube Settlers

• Post-Aerobic Clarification: Compact design enables 90%+ SS removal.

Why Choose Juntai for Your AAO Project? 

• 10+ Years Expertise: Custom solutions for 200+ global wastewater plants.
  
  

• Full-Process Support: From aeration to sludge dewatering (see our rotary screw dewatering machines).
  
  

CTA: Optimize Your Aerobic Treatment Today!
Contact Juntai for FREE process design and equipment quotes.