The BioCycle Cyclic Aeration Process is an automated mixing and aeration system that utilizes real-time controls to create ideal conditions for nutrient removal in secondary wastewater treatment processes while saving energy. This patented process integrates the BioMix Compressed Gas Mixing System within a facility’s new or existing diffused aeration system to optimize biological phosphorus removal, simultaneous nitrification/denitrification, and alkalinity recovery in a single bioreactor.

By decoupling aeration and mixing functions and integrating a process control system, operators can enhance a bioreactors flexibility to control dissolved oxygen (DO) levels, taper aeration, and create discrete anaerobic, anoxic and aerobic conditions. BioCycle effectively reduces energy consumption while maintaining effluent quality.

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How It Works

BioCycle dynamically creates optimal process conditions in secondary aeration basins. To determine when to change the cycle operation, the controller monitors DO, oxidation reduction potential (ORP), nitrate (NO3) and ammonia (NH4) concentrations in the basins. Traditional diffused aeration provides the aeration needed to create aerobic conditions, whereas BioMix provides the mixing required for the anoxic cycles.


Click on the icons below to learn more about the unparalleled flexibility, energy efficiency, process optimization, and straightforward operation that BioCycle provides.

  • flexiable
  • energy
  • process
  • energy
Unparalleled Flexibility
  • Through dynamic process controls, effectively changes aerobic and anoxic process volumes to adapt to influent demands.
  • Allows plant to retrofit secondary treatment processes for biological nutrient removal without adding additional tank volume.
  • Adaptable for tanks of any size, shape, or depth. Extremely effective in both long multi-grid aeration tanks with tapered aeration and in standard single-grid aeration tanks where DO control is a priority.
Energy Efficiency
  • Enables significant power savings by reducing blower consumption by up to 50%.
  • During anoxic cycles, mixing operates at a fraction of the energy of diffused aeration mixing.
Process Optimization
  • Maintains effluent quality while decreasing total nitrogen concentrations.
  • Reduces the level of nitrogen in the aeration tank and recovers alkalinity.
  • Alternating aerobic/anoxic conditions encourage healthy bacteria growth and reduce filamentous bacteria.
  • Improves settleability of solids in the clarifier.
Straightforward Operation
  • All in-tank components are maintenance free, non-clogging, and self-cleaning.
  • Minimal maintenance of out-of-tank components (compressors, receivers, and gas control valves) in controlled environments.

Where It Applies

The BioCycle Cyclic Aeration Process is ideally suited for municipal and industrial secondary treatment BNR processes.

The process is extremely effective for plants that are underloaded compared to design, or plants with wide diurnal variations.