Technology Spotlight

What is your technology?
The Captivator® system combines enhanced primary treatment and sludge thickening in one unit, resulting in up to an 80% footprint reduction as compared to conventional technologies. The system is a unique carbon diversion technology that uses biosorption principles to achieve high BOD and TSS removal, as well as sludge thickening without the need for costly chemicals. This Evoqua technology incorporates well-established wastewater process technologies in an innovative configuration to achieve high performance at low life cycle costs. The Captivator® system blends WAS (waste activated sludge) with raw wastewater in a mildly aerated contact tank to promote rapid biosorption of soluble organics. Following the contact tank, the stream flows to a dissolved air flotation (DAF) unit that functions as a liquid-solids separation unit, as well as a sludge thickening step without the need for polymers. 

What are the benefits to implementing your technology? 
The Captivator® system significantly increases the organic carbon diverted to digestion in lieu of aerobic oxidation, resulting in dramatic energy savings and smaller aeration tanks. The innovative use of proven technologies makes the Captivator® system an elegant solution that provides a great degree of sustainability and resource recovery for wastewater facilities. The system turns an energy-consuming waste into an energy-producing commodity resulting in aeration energy savings and increased biogas production. Suitable for new or existing facilities; the Captivator® system delivers reliable carbon diversion in a small footprint, without the need for additional sludge thickeners or chemicals. 

Has the technology been tested, demonstrated, or implemented anywhere to date? 
The Captivator® system has been in operation since 2014 at the award-winning 32 MGD Agua Nueva facility in Pima County, AZ. In addition, pilots have been conducted in the U.S. and Singapore to demonstrate the technology.

What are some of the next steps needed to advance the technology? 
Evoqua is launching a pilot program so that owners, engineers, and regulators can see the technology perform first-hand. There are currently two pilot units available. Evoqua is seeking opportunities for piloting with utilities that need to address one of the following:

  • Plant expansions.
  • Improved performance of primary treatment using existing infrastructure with minimal disruption.
  • Reduced O&M costs of primary treatments that use chemicals, and generate revenue stream via cogeneration. 

How has LIFT helped, or how can LIFT help? 
LIFT has been a valuable partner for Evoqua Water Technologies as it offers an excellent platform to accelerate the adoption of innovative technologies in the wastewater industry 

To view a short video, or to connect with a technical expert visit:

Argun Erdogan 
Biosolids Product Manager 
Phone: 262-309-1602