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Mt. Pleasant Waterworks Reverse Osmosis No. 4

Location: Mt. Pleasant, SC

Client: Mount Pleasant Waterworks

Project Scope:

  • Permitting
  • Process Design
  • Site Design
  • Building Design
  • Structural
  • Bidding
  • Construction Services
  • Start Up Services

Project Description:

Thomas & Hutton provided engineering design services for Mount Pleasant Waterworks’ new Reverse Osmosis Water Treatment Plant No. 4.

Thomas & Hutton’s responsibilities included building and process design, permitting, bidding, construction and start up services of a 1.4 mgd (expandable to 2.1 mgd) reverse osmosis water treatment plant (WTP) and a 4,100-square foot building. Raw water comes from a cretaceous aquifer deep well with a feedwater TDS of 1,600 mg/L. Two RO trains were designed with a 10:5-7 element array using Hydraulic ESPA 2 membranes.

The WTP boasts the following features:

  • Anti-scalant pre-treatment system and calcium chloride post-treatment system
  • Calcium chloride bulk storage tank
  • Chloramines disinfection system
  • Instrumentation and controls with fully integrated programmable logic controller
  • 600 kW auxiliary generator
  • Incorporated into existing plant site to use ground storage tank and HSPs
  • Harn R/O Systems was the ROEM
Mt. Pleasant Waterworks Reverse Osmosis No. 4