Next Prev

Bogue Banks Reverse Osmosis

Location: Emerald Isle, NC

Client: Bogue Banks Water Corporation

Project Scope:

  • Water Treatment Facility
  • High Service Pump Station Design
  • Site Design
  • Permitting Assistance
  • Construction Observation

Project Description:

Thomas & Hutton performed high service pump station design, water treatment facility design, permitting and bidding, construction and start up services for this project.

The 1.5 mgd Reverse Osmosis Water Treatment Plant includes pre-treatment, post-treatment and a cleaning system. The project includes a high service pump building with three 550 gpm VFD high service pumps. The project included a de-gasifier to strip the hydrogen sulfide.

The RO Skids were designated to fit within an existing building which formerly housed an EDR process. The EDR was abandoned because it could not treat increasing chloride from the local aquifer.

The water treatment plant boasts the following features:

  • Anti-scalant pre-treatment system and calcium chloride post-treatment system
  • Calcium chloride bulk storage tank
  • Instrumentation and controls with fully-integrated programmable logic controller
  • Auxiliary generator
  • HSP station
  • Three raw water supply wells
  • Concrete disposal to Bogue Sound

The water supply for Emerald Isle comes from the castle Hayne Aquifer and underlies the Western end of the island. This is within the Paleo River channel and contains higher salt concentration but declines toward the east. Our goal of the project was to protect the eastern wells from salt migration by pumping the western wells more to affect western flow of fresh groundwater. This “sink” created by the Reverse Osmosis raw water supply well mitigates lateral movement of salt toward the east and protects the overall salinity of the entire island’s well field.

Bogue Banks Reverse Osmosis