Fairfield, PA Municipal Wastewater Treatment Plant

Fairfield, PA Municipal Wastewater Treatment Plant

Chesapeake Bay Initiative Compliance on a Small Municipal Budget

The Town of Fairfield, PA was in a tough position. On one side, environmental regulations of the Chesapeake Bay Initiative were forcing an upgrade to a 40+ year old conventional activated sludge wastewater treatment plant. On the other, the extremely constrained economic environment made that a difficult proposition.


Consulting engineer C.S. Davidson, Inc. sought treatment technologies that could meet tight effluent standards for discharge to the Chesapeake Bay at a cost that was reasonable for a small town.

Additionally, an aging collection system that suffered from persistent Infiltration & Inflow (I&I) required a solution that could treat the towns wastewater effectively under both average and significantly higher peak daily flow conditions. Design average and peak daily flow rates are 0.3 and 0.6 million gallons per day (MGD) respectively.

An Aquapoint AquaCELL™ Moving Bed Biofilm Reactor (MBBR) treatment system was specified for it’s proven enhanced nutrient removal (ENR) capability, ease of operation for the town’s two-man operations group and cost effective design.

The AquaCELL™ process incorporates AquaPoint’s AquaCELL™ 466 biofilm carrier media which moves freely within an aerated wastewater treatment process and provides a high specific surface area for biofilm growth. As the dynamic carrier elements migrate throughout the water column, wastewater passes through the protected internal cells allowing contact between organic/inorganic waste and the fixed biofilm thus providing treatment

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Design Characteristics

Influent Effluent
 PEAK FLOW (MGD) 0.6 0.6
AVG. FLOW (MGD) 0.3 0.3
BODs (mg/I) 250 < 20
TSS (mg/I) 250 < 20
TKN (mg/I) 40
AMMONIA-N (mg/I) 35 < 1
TOTAL-N (mg/I) < 8
TOTAL-P (mg/I) 12 < 1
FECAL (mpn/100ml) < 200

Performance Data

The Aquapoint treatment system was able to incorporate some tanks from the previous plant for aerobic digesters, further contributing to cost savings.

The plant, built by T.A.H Construction in 2012, also included flow equalization, various chemical feed systems, UV disinfection and Integrated PLC controls with remote monitoring capability. Aquapoint provided full support through design, installation and commissioning. We continue that support for the life of the system. The total constructed price of the facility was $5.7M.

System Diagram