projects

Membrane Filtration Water Treatment Plant

Palatka, Florida

Client: City of Palatka, Florida

Services

  • Bidding Administration
  • Construction Administration
  • Design
  • Feasibility Study
  • Resident Project Representation
  • State Grant Funding

Project Summary

The City of Palatka is a small community located along the west shore of the St. Johns River in east Putnam County, Florida. The City was plagued by Trihalomethane (THM) levels in their distribution system consistently in excess of the established maximum contaminant levels (MCL) requiring the City to take corrective actions. The Palatka system contained many dead-end lines which required increased chlorine dosage to ensure sufficient residual at the furthermost points. The THM was produced when the natural organic matter (NOM) present in the source water reacted to the chlorine in the distribution system.

By reviewing water quality data and system hydraulics we determined that water line looping when combined with the removal of the DBP precursors would solve the problem. The two principal treatment goals were reduction of hydrogen sulfide and reduction of distribution system total trihalomethanes (TTHM) and haloacetic acids (HAA5). The upgrade features degassifiers for the removal of hydrogen sulfide, an odor control system for the treatment of hydrogen sulfide off gases, membrane filtration units for the removal of organics, upgraded chemical feed systems, improvements to existing concrete water storage tanks, replacement of existing high service pumps and a wastewater pump station to collect and pump backwash and other system wastewater to the City’s wastewater collection system.

The ultimate hydraulic capacity of the proposed system will be 6.0 mgd however because the system only sees 4.0 mgd we reduced initial capital cost by using a tiered approach. The plant building, piping, bulk chemical tankage, flow metering, waste wetwell and chemical containment areas are all sized for the full 6.0 mgd capacity but the pumping and filtration equipment were sized to meet 4.0 mgd.

Hoyle, Tanner also assisted the City in obtaining a Grant for the Florida DEP SRF Program to fund 85% of the cost of the project.

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