The AquaPASS® system is a time-managed activated sludge technology that integrates select unit processes into a single biological treatment system. The system utilizes the Aqua MixAir® system by providing separate mixing with AquaDDM® direct-drive mixers and Aqua-Aerobic diffused aeration. This system has the capability to cyclically operate the aeration and mixing to promote anoxic/aerobic and anaerobic environments with low energy consumption.

• Aqua MixAir® system provides flexible control of aeration and mixing
• Time-based anoxic intervals promoting exceptional nitrate reduction
• Superior process environment suitable for cold weather climates
• Ideal for a wide range of design flows
• Flexible tank design and equipment options

• Enhanced biological nutrient removal (EBNR)
  • Total nitrogen < 3 mg/l
  • Total phosphorus < 0.6 mg/l
• Flow-through operation with multi-stage performance
• Concentrated return activated sludge (RAS) provides optimized process environments
• Membrane ready for future expansions
• Load proportioned power savings mode
• Simple and flexible system operation