A’Seeb Costal Strip,
Muscat, OMAN
Client: Haya Water
Country: Oman
No. of Redivac Valves: 2,284
No. of Redivac Vacuum Stations: 7
Specialist Feature: The vacuum sewer network
will be one of the largest in the world and the
largest ever constructed in a single project.
The Sultanate of Oman has experienced
significant population growth in recent years.
This growth is expected to continue into the
near future, particularly in the country’s most
populous region, the Governorate of Muscat.
This has led to the implementation of the
Muscat Wastewater Master Plan to address
the urgent need for a wastewater
management system.
The A’Seeb Wastewater Project is a primary
element of the Muscat Wastewater Master
Plan. With a project area of 490 km², it will
provide a new, comprehensive wastewater
network for all residents of the A’Seeb
catchment area.
A highlight of the project is a network of
vacuum sewers. The area covered is a 1-
kilometre strip that runs north for 20 kilometres
from the A’ Seeb International Airport. The
vacuum sewer network is the largest ever
constructed in a single project.
In May 2008 Iseki Vacuum Systems were
awarded the contract to supply 7 vacuum
stations and more than 2,200 Iseki Vacuum
Interface Valves.
Redivac Limited, Iseki Vacuum Systems Limited, High March, Daventry, Northants, NN11 4QE
Telephone: +44 (0) 1327 878777 Fax: +44 (0) 1327 315232 Email: sales@redivac-vacuum.com Website: Redivac-vacuum.com
A’Seeb Costal Strip
OMAN
Vacuum Pipework
The SDR13.6 polyethylene pipework ranges in size
from 90mm to 250mm diameter.
Vacuum Station Equipment
7 No. Redivac Vacuum Stations.
All stations contain numerous rotary vane vacuum
pumps with ratings ranging from 400 to 630 cubic
metres/Hr.
Each station contains 2 No. dry well screw
centrifugal impeller discharge pumps.
The vacuum collection vessel volumes range from
20 to 27 cubic metre, each fully protected with
epoxy coating and tested to Lloyd’s certification.
All stations have separate motor control cabinets in
air conditioned rooms. They are all fully automatic
with programmable PLC. All pumps start in rotation
and all operating conditions are monitored via
station telemetry.
Bespoke “Interface Valve Monitoring System” was
designed and supplied by Redivac. The systems
monitor the open / closed mode of each interface
valve located around the sites.
Summary
The Vacuum Way proved the ideal solution for the
A’Seeb costal area where flat terrain, sandy soil,
and a high water table are important design
considerations. By using Iseki Vacuum Systems to
serve this area with sewage collection, only shallow
excavation were required for installing the vacuum
mains and Interface Valve Chambers. These
shallow excavations did not require dewatering
techniques to be employed and the sometimes
fragile underground drinking water supply was not
contaminated by salt water infiltration.
Furthermore, In the old town area the use of a
vacuum sewer system was particularly important
due to the possibility of fast, cost-effective and
flexible installation and in the busy commercial
district the Redivac system caused very little
disruption to normal life.
Redivac Limited, Iseki Vacuum Systems Limited, High March, Daventry, Northants, NN11 4QE
Telephone: +44 (0) 1327 878777 Fax: +44 (0) 1327 315232 Email: sales@redivac-vacuum.com Website: Redivac-vacuum.com
