Vacuum Sewerage System
Contents
Introduction
Project Salient
Principle of Function
Comparison with Gravity System
Integrated Layout
Individual Component
Site Photograph/Activities
Conclusion
INTRODUCTION
Vacuum Sewerage System is a Mechanized system of wastewater transport, unlike gravity flow.
It uses the differential air pressure to move the wastewater.
It requires a central source of power to run Vacuum pumps which maintains vacuum on the collection system.
The system requires a normally closed Vacuum interface valve at each entry to seal the lines so that vacuum is maintained.
The resulting differential pressure between atmosphere and vacuum becomes the driving force that propels the wastewater towards the vacuum station.
PROJECT SALIENT
The Projects Includes Vacuum Sewerage system
Pipe Length to be relocated : 5.9 km Approx
Diameter Used : 90/125/180/200mm
Types of pipes : HDPE(SDR 13.6 &11)
Peak Flow : 13.2 lit/sec
Types of Flow : Negative Pressure(-0.64 to -0.75)
PROJECT SALIENT
DEVELOPER : ALDAR
CONSULTANTS :
- Consultant (Design) : M/s Dar Al Handasah- Consultant (Supervision) : M/s Dar Al Handasah
- Consultant(Overseeing) : M/s Mott MacDonald
CONTRACTOR- M/s Six Co.
Specialized Contractor
- METCO
Estimated Project Cost : AED 8.65 MILLIONS
Start Date : Jan 2010
Completion Date : Sep 2010
Project Status : Completed
PRINCIPLE OF FUNCTION
Comparison with Gravity System
Factors Gravity Vacuum
Pipe Diameter Large (>160) Small (80-250)
Trenches Deep Shallow
Excavation Complicated and long
term
Simple and fast
Leakage Possible Impossible
Manholes Required No manholes, inspection
pipes only
Machinery required Heavy machinery Simple machinery
Cost High Cost Low(compare to gravity)
Storm Water Can Collect Cannot Collect
Distance Long Distance Short Distance
Biofilter Not Required Required
INTEGRATED LAYOUT
INDIVIDUAL COMPONENT
Interface Valve
Isolation valve
Vacuum Pump
Vacuum Vessel
Discharge Pump
Interface Valve
Division Valve
Vacuum Pump
Vacuum Vessel & Discharge Pumps
SITE ACTIVITIES
SITE ACTIVITIES
SITE ACTIVITIES
SITE ACTIVITIES
SITE ACTIVITIES
SITE ACTIVITIES
CONCLUSION.
For the planning and layout of a sewerage system both systems should be considered.
There is the use for conventional gravity systems in the presence of sufficient slope and in densely populated areas
But in rural communities and town extremities, the VSS should be regarded as an appropriate solution for the installation of a sewer network.
CONCLUSION
It improves the hygienic conditions and
will raise the living standard of the
population
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