Desalination & Reuse Handbook - Flipbook - Page 39
FEATURED DESALINATION PLANTS
BARKA 4 IWP, OMAN
Plant Name
Barka IV IWP
Location
Barka, Oman
Production capacity
281,000 m³/d
Date awarded
January 2016
Date commissioned
June 2018
Feedwater source
Gulf of Oman
Feedwater TDS
42,000 ppm
Feedwater temperature
22–35°C
Product water quality
TDS: 120–500 ppm
Chloride: < 250 ppm
Total hardness: 40–100 ppm
Alkalinity: 30–100 ppm
Fluoride: 0.6–0.8 ppm
Free chlorine after 30 min: > 0.6 ppm
Product recovery
46%
RO passes
2
Number of RO trains
1st pass: 12
2nd pass: 3
RO membrane Supplier
Dow
Energy Consumption
≤ 3.15 kWh/m3
Energy recovery supplier
Flowserve / Calder (DWEER)
Pretreatment system
DAF, coagulation chambers, DMGF
Post-treatment
Remineralisation and permeate storage
Intake
Sub-surface offshore intake pipes x 2 (diameter 2m)
Intake location
1.5 km offshore
Intake depth
4m
Concentrate disposal
Seawater outfall: 700m outfall pipes with diffusers x 2
(diameter 1.4m)
Project delivery method
IWP
EPC contractor
Suez
Client
Oman Power & Water Procurement Company (OPWP)
Project cost
$300 million
System footprint
120,000 m2
In July 2018, the Barka Desalination Company
announced the commercial launch of the Barka
Independent Water Project (IWP). With a
120,000 m2 footprint and 281,000 m3/d production
capacity, the seawater reverse osmosis (SWRO)
plant is the largest of its kind in Oman. It forms
part of an extremely active project pipeline, with
planned and contracted projects lined up to 2023,
and is the second large-scale SWRO project to be
commissioned in 2018, after the April start-up of
the Qurayyat IWP. The IWP is the largest single
desalination unit in Oman, representing over 10%
of the country’s operational SWRO capacity.
The plant was financed and built by the Barka
Desalination Company (BDC) – a project company
made up of Itochu Corporation (36% stake), ENGIE
(27%), Suez (27%), and Towell Engineering (10%)
– with an EPC cost of $300 million. BDC signed a
20-year water purchase agreement with the Oman
Water and Power Procurement Company (OPWP).
Suez designed, built, and commissioned the plant,
and will operate and maintain the facility for the
duration of the 20-year agreement.
The plant’s pretreatment system features SEADAF
dissolved air floatation (DAF), coagulation, and
dual media granular filtration (DGMF). A two-pass
reverse osmosis system in a 12+3 configuration
achieves a 46% recovery rate, producing permeate
with TDS levels of 120–500 ppm from feedwater
with a TDS of 42,000 ppm.
BDC emphasises the importance of the
plant’s energy consumption in producing an
environmentally friendly and sustainable source of
high-quality drinking water. Using a DWEER energy
recovery system, the Barka 4 IWP operates with an
energy consumption of 3.15 kWh/m3.
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