AquaNereda represented by Envirep/TLC in Pennsylvania, Maryland, New Jersey, Delaware, and Washington D.C.

AquaNereda by Aqua-Aerobic Systems

AquaNereda by Aqua-Aerobic System is an advanced biological wastewater treatment technology providing Enhanced Nutrient Removal (ENR) with Total Nitrogen <3mg/L and Total Phosphorus <1mg/L without chemicals. The technology has been used successfully for over 15 years in full-scale wastewater treatment facilities, with over 80 installations worldwide. It was developed by the Dutch company Royal HaskoningDHV in collaboration with the Delft University of Technology.

Aerobic Granular Sludge Process

AquaNereda is an aerobic granular sludge process that generates durable granules composed entirely of biomass that efficiently performs both nitrification and denitrification while biologically reducing phosphorus to low levels without chemical addition. One of the main attributes of aerobic granular sludge is its rapid settling properties. Based on the density of the granules, granular biomass settles significantly faster than traditional activated sludge.

The Nereda process has several advantages over traditional wastewater treatment technologies. It uses less energy and chemicals, produces less sludge, and has a smaller carbon footprint. It possesses a higher treatment capacity and accommodates various wastewater types, such as municipal and industrial wastewater.

Key Features and Benefits of the Aerobic Granular Sludge Process

  • Small Footprint
  • Proven enhanced nutrient removal (ENR)
  • Up to 50 percent energy savings
  • Excellent settling
  • No chemical addition
  • Resilient to fluctuations in pH, toxic shocks, loadings, and flows
  • Easy operation with fully automated controls
  • Low capital costs and low life cycle costs
  • Ideal for both municipal and industrial applications
  • Suitable for new construction and retrofits, small and large plants

In North America, a major success was the startup of the Wolf Creek WWTP in Foley, Alabama. The three-reactor plant treats domestic wastewater and has a design capacity of 3.5 million gallons a day (MGD) on average, with a 6-MGD peak. Within 30 days, the plant was meeting stringent effluent requirements.

Read about the Wolf Creek WWTP project in Foley, Alabama, here.

Review a great slide presentation on the AquaNereda process here.

Watch AquaNereda Video

Photo showing the granules formed by the AquaNereda Granular Activated Sludge process.
Photo showing the granules formed by the AquaNereda Granular Activated Sludge process.

AquaNereda Demonstration Facility

The AquaNereda demonstration facility at the Four Rivers Sanitation Authority in Rockford, IL, is a pilot-scale plant using Nereda technology for wastewater treatment. It was constructed in 2016 as a joint project between the City of Rockford and the University of Illinois at Urbana-Champaign to test the effectiveness of the AquaNereda process in cold weather conditions. The facility has a treatment capacity of 150,000 gallons per day and has been successful in demonstrating the feasibility of the AquaNereda technology in the United States.

Contact Envirep

CLICK HERE to view our manufacturer’s line card.

Envirep/TLC is a manufacturer’s representative for Aqua-Aerobic Systems, Inc. in Pennsylvania, Delaware, Maryland, New Jersey, Virginia, and Washington, D.C.

Contact Envirep at 717-761-7884 or

By Michael Gillespie, President at Envirep