NCC WF1New Castle County Water Farm #1 WWTP
New Castle County, DE


Duffield Associates was retained by New Castle County, Delaware to upgrade the Water Farm No. 1 wastewater treatment facility in Odessa, Delaware.  The plant serves the Towns of Odessa and Townsend as well as unincorporated areas in southern New Castle County.  The upgraded facility has a design treatment capacity of 2.5 MGD and the capability to provide biological nutrient reduction (BNR).  Treated wastewater is both land applied and discharged to the Appoquinimink River.

Duffield provided design, bid, and construction phase services for the upgrade and facility expansion.  The upgrades included two (2) sequencing batch reactor basins, as well as space for 2 additional basins in cast-in-place below grade concrete tanks for an ultimate treatment capacity NCC WF2of 5.0 MGD.  Positive displacement blowers, retrievable fine bubble diffusers, and direct drive floating mixers were installed for the SBR process.  Other improvements included new cloth disc filters for tertiary treatment, UV disinfection system, headworks building, aerobic digestion tanks, and sludge storage facilities.