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Village of Hamilton Wastewater Treatment Facility

Facing significant changes to their State Pollution Discharge Elimination System (SPDES) permit levels and more stringent effluent requirements due to the Chesapeake Bay Watershed TMDL, the Village of Hamilton selected MRB Group to evaluate the existing wastewater treatment plant and provide recommendations for improvements.  Evaluations included the annual loading requirements for Nitrogen and Phosphorus to the receiving stream, based on current permitted flows as well as accomodating future flow scenarios.

The Village of Hamilton Wastewater Treatment Plant was an aged activated sludge plant that included final clarification, sand filtration, and post aeration/chlorination to remove Biological Oxygen Demand, Total Suspended Solids, and Ammonia.  The plant was effectively meeting its permit limits for several years, however, MRB Group found that the new effluent limits would limit the plant capacity to the current flow and not allow any further capacity for future growth.  While meeting the current permit limits, Hamilton’s existing treatment processes were also inadequate to sufficiently treat for Total Phosphorus and Total Nitrogen.

 MRB Group recommended a new design for the Hamiton WWTP that provides for the new limits and allow for the system’s capacity to serve Hamilton’s growing needs.

 The major improvements include:

  • Conversion of the existing aeration basins to SBR (Sequencing Batch Reactor) basins and the construction of two new SBR basins (4-Basin SBR system), including aerobic and anoxic phasing.
  • Retrofit of existing sand filters with tertiary disc filtration units.
  • New UV disinfection system.
  • Conversion of the existing final settling tanks to new aerobic digesters.
  • New belt filter press and sludge drying building.

 With assistance from MRB Group, funding for the project was secured through NYS EFC with a 0% interest loan.