Ultrafiltration & Reverse Osmosis WTP

Start Start Date: Nov 2003
Completion Date: Dec 2004
Delays: 30 Days
Liquidated Damages: None
Change Orders: None
Contact: Harvey Newman, VP, Port St. Lucie, FL

The Water Treatment Division of Layne Christensen Company was contracted through Wharton-Smith by the Spanish Lakes Community Association, Florida, to provide a hybrid water treatment system consisting of two (2) 125,000 GPD of ultrafiltration (UF) units and two (2) 125,000 GPD of low pressure reverse osmosis (LPRO) providing a total capacity of 500,000 GPD. The custom process design was developed by Layne to enable Spanish Lakes to both meet current and foreseeable water treatment requirements as well as produce a permitable waste discharge. The UF system uses Toray Americas UF multibore membranes to ensure long-term membrane integrity and performance. Toray Americas is providing the TMG20-400 LPRO membranes to complete the process design.

The process design is unique in Florida and provides a lot of flexibility allowing the owner to produce a variable level of potable water quality that they desire and/or need by adjusting the operational conditions of the UF and LPRO system. This may include process changes to the units themselves to provide a higher quality of treated water or by adjusting the blend ratio of these two treatment processes. The systems are fully automated, controlled by a single programmable logic controller and operator interface screen where the operator can make adjustments, visually examine the operational state of the system and obtain critical operational data. Layne's scope included providing process design, design and construction of the UF and LPRO water treatment units, programming the PLC control system, installation and start-up.

SOURCE: Layne Christensen