Namur Urban waste water collection and treatment
26th of October 2015
ESTONIAN WATER WORKS ASSOCIATION EVEL
Baseline data
• POPULATION : 105.000 inhab.
• POPULATION Meuse upstream : 92.000 inhab. • POPULATION Sambre : 13.000 inhab.
• Collective treatment systems : 96.000 inhab. (13.000 m3 WW/d)
• Individual treatment systems : 9.000 inhab (+- 10 %). • At the confluence of 2 main rivers : Meuse and Sambre
24/06/2010 3 22/04/2010 FORUM TTE 3
24/06/2010 5 22/04/2010 FORUM TTE 5 Origine du réseau d’égouts urbain
Namur
Brumagne WWTP
93.100 EH - 2011
Existing collectors since 1985
Houyoux collector 2008
Pressure collectors and vortex 2007-2011
Namur - Brumagne area
Conception
• Waste water pressure transport • Goal : Avoid to many groundworks and lower pipe sections
• Objectives : Limit displacement of pipes and other networks
• Treatment of water discharge under rain time • Goal : Compensation of flow limit involved with pressure
systems
• Objectives: Lower discharge of water during rain time
MEUSE
DO
cv
MEUSE EU
Gravity
collector –
waste water
Unit water : mixed rain and waste
waters Discharge of unit
waters during rain
time
Storm weirs
Intercepts waste water
limits yield
DEPTH
3 to 6 m
BASIS SCHEME
MEUSE MEUSE
Discharge of
unit waters
during rain
time
Pressure collectors
Pumping station
Flow regulated
Calibrated overflow
DEPTH
1,8 to 3 m
UNDER PRESSURE SCHEME
Unit water : mixed rain and
waste waters
Longitudinal profile of the collector
Path along the river
BASIS SCHEME :
SUCCESSIVE PUMPING
Intermediate pumping station Path along the river
PRESSURE COLLECTORS SCHEME :
PUMPING WITH ONE MAIN DISCHARGE
SPI
Rain water treatment
• Treatment system at each urban discharge
• « Vortex » technology
• Objectives :
• Separate particulate matter (200µ)
• Take off floating matter (>1 cm)
Sewer
arrives in
"Vortex"
Waste water
and mud Treated
water to
Meuse
Summary
Séparateur Vortex
Sewer
Riv
er
Flow selector
Q (t)
Égout
existant
Pumping
Grid C
olle
cte
ur b
asse
pre
ssio
n
4 Qts Mixing
zone Setteld SM
40 Qts
36 Qt363
440 DWF
440 DWF
436 DWF
44 DWF
Q(t) –
4DWF
Main data’s
• Vortex : 37 units
• Pumping stations :10 units
• Pipe lengths (cumulated) : 15 km
• Cross section of pipes : 200 mm upstream until 900 mm downstream
• Bidder : SM CFE – DANHEUX & MAROYE - NIZET
• Amount of works: 48.770.000 €
• Commissioning start from 05-2007
• End of works: 04-2011
Complex works
Thank you