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Sulaibiya Wastewater Treatment

Plant type

Reverse osmosis (RO) and ultra-filtration (UF) membrane-based water purification of wastewater

Plant output

Potable quality water for non-potable uses in agriculture, industry and aquifer recharge

Input feed

375,000m³/day

Output product

311,250m³/day

Waste

63,750m³/day

Water recovery efficiency

85% (RO phase), 83% (overall)

Future expansion design potential

600,000m³/day (input feed)

<b>Raw Wastewater Input Characteristics</b>

Temperature

15&#176;C to 36&#176;C

TSS

300mg/l

TDS

1,280mg/l

BOD5

400mg/l

COD

700mg/l

Sulphates

300mg/l

H2S

66mg/l

Total N

70mg/l

Total P

15mg/l

Oil and grease

40mg/l

<b>Product Water Characteristics (Monthly Average Value)</b>

pH

6-9

TDS

<100mg/l

TSS

<1mg/l

BOD5

<1mg/l

NH4-N

<1mg/l

NO3-N

<1mg/l

PO4

<2mg/l

Oil and grease

<0.05mg/l

TOC

<2mg/l

Hardness as (Ca CO3)

<10mg/l

Enteric viruses

5 MPNIU/10 l

Total coliform

<2.2 colonies/100ml

Disc filter elements

5 disc filters (60&#181;m)

Ultra-filtration (UF) elements

Total membrane area 304,640m&#178;; 68 skids with 32 pressure vessels; pore size 30nm

UF performance

Total removal of SS; log 5 removal of bacteria; log 4 removal of viruses

Reverse osmosis (RO) elements

24 first array skids;12 second array skids; six third array skids; each skid comprises 72 pressure vessels containing seven membrane modules apiece; 48 associated pumps

Diffuser array

50,000 Sanitaire Silver Series Diffusers; 2,600 Sanitaire Coarse Bubble Diffusers

Aeration, pumping and mixing system components

13 Blowers; 45 Mixers; 72 Flow boosters; 27 Recirculation pumps; >25km of air main and flooring pipes

Digester volumetric load

2.45kg/VS/m&#179;/d

Contract type

BOT

Concession period

30 years (30 months D&B, 27.5 years O&M)

Total project cost

KD130 million ($430 million)

Loan value

$377 million

Loan period

25 years

Debt-equity

85:15

Projected revenue

>$2 billion

Winning water tariff

$0.47/m&#179;

Tender pre-qualifications

October 1998

Tender bids submitted

April 2000

BOT contract awarded

May 2001

Financial close / service contracts signed

June 2002

Construction begun

July 2002

Aeration / pumping / mixing contract awarded

January 2003

Dynamic hydraulic analysis

March 2003 - February 2004

Pipework contracts awarded

May 2003

Construction completed

November 2004

Formal dedication ceremony

16 March 2005

First water supplied

December 2005

Contract administration

Kuwaiti Ministry of Public Works

Main contractors

Kharafi, Ionics, Bechtel and United Utilities

Utilities Development Company (UDC)

Kharafi Group (75%) and Ionics (25%)

Financial adviser to UDC

ABN Amro

Technical advisers and construction managers

Camp Dresser & McKee; KEO International Consultants

International legal counsel

Allen & Overy

Insurance advisers

Arab Commercial Enterprises

Finance arrangers

National Bank of Kuwait; Gulf Bank; The Bank of Kuwait and the Middle East

Facility agent

National Bank of Kuwait

Arrangers legal counsel

Shearman & Sterling; Al-Essa, Al-Bader & Partners

Insurance advisers

Willis

Financial model auditor

PKF

Design review / technical due diligence

Halcrow

Construction

Kharafi and Philipp Holzmann JVC

Plant design

ILF

RO/UF membrane treatment systems

Ionics Italba

XIGA ultra-filtration membrane technology

NORIT

Aeration, pumping and mixing system

ITT Industries

Piping and internal cement / epoxy

Xinxing Ductile Iron Pipes

Pipe couplings

Viking Johnson

Dynamic hydraulic analysis

WL Delft Hydraulics

Plant operation and maintenance

Kharifi, Ionics and United Utilities

Membrane system operation and maintenance

Ionics
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