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

THANK YOU !!!