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Forest Trails Wastewater Treatment Plant Replacement

Location: Isle of Palms, SC

Client: Isle of Palms Water & Sewer Commission

Project Scope:

  • Architectural Services
  • Construction Documents
  • Landscape Design
  • Layout Design
  • Process Design
  • Structural Design
  • Treatment Process Selection

Project Description:

A new treatment facility was designed by Thomas & Hutton to replace the aged steelpackage system at the Isle of Palms Water & Sewer Commission Forest Trails Wastewater Treatment Plant site. A review of various treatment alternatives ensued, including contact stabilization, oxidation ditch, traditional fine bubble activated sludge, sequencing biologic reactors (SBR), and membrane bioreactors (MBR). Due to space constraints, and superior treatment, the MBR process was chosen using a Business Case Evaluation process which considered monetary and non-monetary factors.

In addition to membrane filtration, the facility will include new influent screens, aeration, aerobic sludge digestion, odor control, disinfection, a control room, and support facilities. 

Extensive architectural treatments were added to the plant so it “fits” into the residential neighborhood and landscaping will be placed to soften the visual impact. Effects from the plant’s operation are lowered by limiting noise and odor from the site.

Highlights of the project include:

  • Demolition of the former facility
  • Construction sequencing maintained plant operations during construction
  • Aesthetic and odor control containment and control features to mitigate off-site impacts
  • Community-sensitive design to minimize plant impacts
  • Business Case Evaluation was conducted to evaluate the project needs and to select the preferred treatment technology by using monetary and non-monetary factors considering financial, environmental, and social impact
Forest Trails Wastewater Treatment Plant Replacement