Demonstrating a Novel Separate Centrate Deammonification Process: 26th Ward

Client: NYCDEP
Location: Brooklyn NY

Hazen and Sawyer, in collaboration with NYCDEP, NYSERDA, Manhattan College and Columbia University, developed and piloted an innovative approach for applying deammonification at the 26th Ward facility. This novel approach is referred to as separate centrate deammonification (SCAD). The SCAD approach exploits the natural predisposition of the mixed culture community to perform nitrification, denitrification and anaerobic ammonia oxidation to achieve cost-effective nitrogen removal.

Shown here are the reactor (at left) and the settler (right) of the pilot facility.

Project Outcomes and Benefits

  • The research team demonstrated that the SCAD process can achieve greater than 60% TIN removal while reducing aeration (57% reduction), alkalinity (50% reduction) and supplemental carbon demand (90% reduction).
  • Conceptual analyses of implementing SCAD at the full-scale indicated that annual savings up to $1,800,000 per year could be achieved at 26th Ward.
  • The successful demonstration of the SCAD process represents a step forward for the water resource recovery industry since it proves that deammonification can be implemented at WWRFs using non-proprietary processes.

Further details on this research can be found at WITPress and in this WEF abstract.