Tuas Seawater Desalination Plant - Seawater Reverse Osmosis (SWRO), Singapore
Key Data:
Plant type
Seawater Reverse Osmosis (SWRO)
Output capacity
136,380m³/d
Pre-treatment elements
Mechanical rake coarse screens, cartridge filters, dissolved air flotation (DAF) units, primary gravity sand filters (GSF), secondary pressure sand filters (PSF)
RO treatment train
Two passes - first for DS removal, second to reduce boron levels
Energy recovery
Pelton wheel and pressure exchange type ERS
Product water treatment
Lime for pH correction, chlorine / ammonia for final disinfection, fluoride added
Brine stream disposal
Sea discharge via submerged outfall
Initial tendered water price
Initial $0.78/m³ in 2005, varying according to a formula linked to fuel costs and inflation
First year selling price
$0.49/m3
Project cost
S$200m
Project finance
S$165m loan, S$35m equity investment
Project Timeline:
Contract awarded
19 January 2003
Hyflux buy out Ondeo Group
June 2003
Groundbreaking ceremony
16 January 2004
Plant opened
13th September 2005
Project Merit awarded
March 2006
Global Water Distinction awarded
May 2006
Contract period ends
2025
Key Players:
Client
Singapore Public Utilities Board (PUB)
DBOO contractor
SingSpring, originally a consortium between Hyflux (70%) and Ondeo Group (30%), now 100% Hyflux owned
Design, permitting and support services
Black & Veatch
EPC contractor
Hydrochem (a wholly owned subsidiary of Hyflux)
Financing
DBS Bank (lead arranger), KBC Bank, ING Bank & Standard Chartered Bank
SingSpring project and finance advice
Hunton & Williams
